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Dependents:   GYRO_MPU6050 Bluetooth_Powered_Multimeter_Using_STM32F429_and_RTOS fyp

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Comitter:
guilhemMBED
Date:
Mon Feb 03 13:41:14 2020 +0000
Commit message:
previous version;

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rtos/Mail.h Show annotated file Show diff for this revision Revisions of this file
rtos/MemoryPool.h Show annotated file Show diff for this revision Revisions of this file
rtos/Mutex.cpp Show annotated file Show diff for this revision Revisions of this file
rtos/Mutex.h Show annotated file Show diff for this revision Revisions of this file
rtos/Queue.h Show annotated file Show diff for this revision Revisions of this file
rtos/RtosTimer.cpp Show annotated file Show diff for this revision Revisions of this file
rtos/RtosTimer.h Show annotated file Show diff for this revision Revisions of this file
rtos/Semaphore.cpp Show annotated file Show diff for this revision Revisions of this file
rtos/Semaphore.h Show annotated file Show diff for this revision Revisions of this file
rtos/Thread.cpp Show annotated file Show diff for this revision Revisions of this file
rtos/Thread.h Show annotated file Show diff for this revision Revisions of this file
rtos/rtos.h Show annotated file Show diff for this revision Revisions of this file
rtos/rtos_idle.c Show annotated file Show diff for this revision Revisions of this file
rtos/rtos_idle.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/ARM7/TOOLCHAIN_GCC/HAL_CM0.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/ARM7/TOOLCHAIN_GCC/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/HAL_CM.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/RTX_CM_lib.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/RTX_Conf.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/RTX_Conf_CM.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/cmsis_os.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/os_tcb.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_CMSIS.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_Event.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_Event.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_HAL_CM.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_List.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_List.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_Mailbox.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_Mailbox.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_MemBox.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_MemBox.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_Mutex.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_Mutex.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_Robin.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_Robin.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_Semaphore.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_Semaphore.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_System.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_System.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_Task.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_Task.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_Time.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_Time.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_ARM7/rt_TypeDef.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/HAL_CA.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/RTX_CM_lib.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/RTX_Conf_CA.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/RTX_Config.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/TOOLCHAIN_ARM/HAL_CA9.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/TOOLCHAIN_ARM/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/TOOLCHAIN_GCC/HAL_CA9.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/TOOLCHAIN_GCC/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/TOOLCHAIN_IAR/HAL_CA9.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/TOOLCHAIN_IAR/HAL_CA9_asm.s Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/TOOLCHAIN_IAR/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/cmsis_os.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_CMSIS.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Event.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Event.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_HAL_CA.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_HAL_CM.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_List.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_List.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Mailbox.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Mailbox.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_MemBox.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_MemBox.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Memory.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Memory.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Mutex.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Mutex.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Robin.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Robin.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Semaphore.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Semaphore.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_System.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_System.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Task.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Task.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Time.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Time.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_Timer.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_A/rt_TypeDef.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/HAL_CM.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/RTX_CM_lib.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/RTX_Conf_CM.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/RTX_Config.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_ARM/HAL_CM0.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_ARM/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_GCC/HAL_CM0.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_GCC/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_IAR/HAL_CM0.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_IAR/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_ARM/HAL_CM0.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_ARM/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_GCC/HAL_CM0.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_GCC/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_IAR/HAL_CM0.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_IAR/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_ARM/HAL_CM3.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_ARM/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_GCC/HAL_CM3.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_GCC/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_IAR/HAL_CM3.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_IAR/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_ARM/HAL_CM4.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_ARM/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_GCC/HAL_CM4.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_GCC/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_IAR/HAL_CM4.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_IAR/SVC_Table.S Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/cmsis_os.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_CMSIS.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Event.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Event.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_HAL_CM.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_List.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_List.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Mailbox.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Mailbox.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_MemBox.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_MemBox.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Memory.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Memory.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Mutex.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Mutex.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_OsEventObserver.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_OsEventObserver.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Robin.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Robin.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Semaphore.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Semaphore.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_System.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_System.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Task.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Task.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Time.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Time.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Timer.c Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_Timer.h Show annotated file Show diff for this revision Revisions of this file
rtx/TARGET_CORTEX_M/rt_TypeDef.h Show annotated file Show diff for this revision Revisions of this file
targets/TARGET_ARM_SSG/mbed_rtx4.h Show annotated file Show diff for this revision Revisions of this file
targets/TARGET_Freescale/mbed_rtx4.h Show annotated file Show diff for this revision Revisions of this file
targets/TARGET_Maxim/mbed_rtx4.h Show annotated file Show diff for this revision Revisions of this file
targets/TARGET_NORDIC/mbed_rtx4.h Show annotated file Show diff for this revision Revisions of this file
targets/TARGET_NUVOTON/mbed_rtx4.h Show annotated file Show diff for this revision Revisions of this file
targets/TARGET_NXP/mbed_rtx4.h Show annotated file Show diff for this revision Revisions of this file
targets/TARGET_ONSEMI/mbed_rtx4.h Show annotated file Show diff for this revision Revisions of this file
targets/TARGET_RENESAS/mbed_rtx4.h Show annotated file Show diff for this revision Revisions of this file
targets/TARGET_STM/mbed_rtx4.h Show annotated file Show diff for this revision Revisions of this file
targets/TARGET_Silicon_Labs/mbed_rtx4.h Show annotated file Show diff for this revision Revisions of this file
targets/TARGET_WIZNET/mbed_rtx4.h Show annotated file Show diff for this revision Revisions of this file
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diff -r 000000000000 -r a7c449cd2d5a rtos/Mail.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/Mail.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,113 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef MAIL_H
+#define MAIL_H
+
+#include <stdint.h>
+#include <string.h>
+
+#include "cmsis_os.h"
+
+namespace rtos {
+/** \addtogroup rtos */
+/** @{*/
+
+/** The Mail class allow to control, send, receive, or wait for mail.
+ A mail is a memory block that is send to a thread or interrupt service routine.
+  @tparam  T         data type of a single message element.
+  @tparam  queue_sz  maximum number of messages in queue.
+*/
+template<typename T, uint32_t queue_sz>
+class Mail {
+public:
+    /** Create and Initialise Mail queue. */
+    Mail() {
+    #ifdef CMSIS_OS_RTX
+        memset(_mail_q, 0, sizeof(_mail_q));
+        _mail_p[0] = _mail_q;
+
+        memset(_mail_m, 0, sizeof(_mail_m));
+        _mail_p[1] = _mail_m;
+
+        _mail_def.pool = _mail_p;
+        _mail_def.queue_sz = queue_sz;
+        _mail_def.item_sz = sizeof(T);
+    #endif
+        _mail_id = osMailCreate(&_mail_def, NULL);
+    }
+
+    /** Allocate a memory block of type T
+      @param   millisec  timeout value or 0 in case of no time-out. (default: 0).
+      @return  pointer to memory block that can be filled with mail or NULL in case error.
+    */
+    T* alloc(uint32_t millisec=0) {
+        return (T*)osMailAlloc(_mail_id, millisec);
+    }
+
+    /** Allocate a memory block of type T and set memory block to zero.
+      @param   millisec  timeout value or 0 in case of no time-out.  (default: 0).
+      @return  pointer to memory block that can be filled with mail or NULL in case error.
+    */
+    T* calloc(uint32_t millisec=0) {
+        return (T*)osMailCAlloc(_mail_id, millisec);
+    }
+
+    /** Put a mail in the queue.
+      @param   mptr  memory block previously allocated with Mail::alloc or Mail::calloc.
+      @return  status code that indicates the execution status of the function.
+    */
+    osStatus put(T *mptr) {
+        return osMailPut(_mail_id, (void*)mptr);
+    }
+
+    /** Get a mail from a queue.
+      @param   millisec  timeout value or 0 in case of no time-out. (default: osWaitForever).
+      @return  event that contains mail information or error code.
+    */
+    osEvent get(uint32_t millisec=osWaitForever) {
+        return osMailGet(_mail_id, millisec);
+    }
+
+    /** Free a memory block from a mail.
+      @param   mptr  pointer to the memory block that was obtained with Mail::get.
+      @return  status code that indicates the execution status of the function.
+    */
+    osStatus free(T *mptr) {
+        return osMailFree(_mail_id, (void*)mptr);
+    }
+
+private:
+    osMailQId    _mail_id;
+    osMailQDef_t _mail_def;
+#ifdef CMSIS_OS_RTX
+    uint32_t     _mail_q[4+(queue_sz)];
+    uint32_t     _mail_m[3+((sizeof(T)+3)/4)*(queue_sz)];
+    void        *_mail_p[2];
+#endif
+};
+
+}
+
+#endif
+
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtos/MemoryPool.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/MemoryPool.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,86 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef MEMORYPOOL_H
+#define MEMORYPOOL_H
+
+#include <stdint.h>
+#include <string.h>
+
+#include "cmsis_os.h"
+
+namespace rtos {
+/** \addtogroup rtos */
+/** @{*/
+
+/** Define and manage fixed-size memory pools of objects of a given type.
+  @tparam  T         data type of a single object (element).
+  @tparam  queue_sz  maximum number of objects (elements) in the memory pool.
+*/
+template<typename T, uint32_t pool_sz>
+class MemoryPool {
+public:
+    /** Create and Initialize a memory pool. */
+    MemoryPool() {
+    #ifdef CMSIS_OS_RTX
+        memset(_pool_m, 0, sizeof(_pool_m));
+        _pool_def.pool = _pool_m;
+
+        _pool_def.pool_sz = pool_sz;
+        _pool_def.item_sz =  sizeof(T);
+    #endif
+        _pool_id = osPoolCreate(&_pool_def);
+    }
+
+    /** Allocate a memory block of type T from a memory pool.
+      @return  address of the allocated memory block or NULL in case of no memory available.
+    */
+    T* alloc(void) {
+        return (T*)osPoolAlloc(_pool_id);
+    }
+
+    /** Allocate a memory block of type T from a memory pool and set memory block to zero.
+      @return  address of the allocated memory block or NULL in case of no memory available.
+    */
+    T* calloc(void) {
+        return (T*)osPoolCAlloc(_pool_id);
+    }
+
+    /** Return an allocated memory block back to a specific memory pool.
+      @param   address of the allocated memory block that is returned to the memory pool.
+      @return  status code that indicates the execution status of the function.
+    */
+    osStatus free(T *block) {
+        return osPoolFree(_pool_id, (void*)block);
+    }
+
+private:
+    osPoolId    _pool_id;
+    osPoolDef_t _pool_def;
+#ifdef CMSIS_OS_RTX
+    uint32_t    _pool_m[3+((sizeof(T)+3)/4)*(pool_sz)];
+#endif
+};
+
+}
+#endif
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtos/Mutex.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/Mutex.cpp	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,56 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "rtos/Mutex.h"
+
+#include <string.h>
+#include "platform/mbed_error.h"
+
+namespace rtos {
+
+Mutex::Mutex() {
+#ifdef CMSIS_OS_RTX
+    memset(_mutex_data, 0, sizeof(_mutex_data));
+    _osMutexDef.mutex = _mutex_data;
+#endif
+    _osMutexId = osMutexCreate(&_osMutexDef);
+    if (_osMutexId == NULL) {
+        error("Error initializing the mutex object\n");
+    }
+}
+
+osStatus Mutex::lock(uint32_t millisec) {
+    return osMutexWait(_osMutexId, millisec);
+}
+
+bool Mutex::trylock() {
+    return (osMutexWait(_osMutexId, 0) == osOK);
+}
+
+osStatus Mutex::unlock() {
+    return osMutexRelease(_osMutexId);
+}
+
+Mutex::~Mutex() {
+    osMutexDelete(_osMutexId);
+}
+
+}
diff -r 000000000000 -r a7c449cd2d5a rtos/Mutex.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/Mutex.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,73 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef MUTEX_H
+#define MUTEX_H
+
+#include <stdint.h>
+#include "cmsis_os.h"
+
+namespace rtos {
+/** \addtogroup rtos */
+/** @{*/
+
+/** The Mutex class is used to synchronise the execution of threads.
+ This is for example used to protect access to a shared resource.
+*/
+class Mutex {
+public:
+    /** Create and Initialize a Mutex object */
+    Mutex();
+
+    /** Wait until a Mutex becomes available.
+      @param   millisec  timeout value or 0 in case of no time-out. (default: osWaitForever)
+      @return  status code that indicates the execution status of the function.
+     */
+    osStatus lock(uint32_t millisec=osWaitForever);
+
+    /** Try to lock the mutex, and return immediately
+      @return  true if the mutex was acquired, false otherwise.
+     */
+    bool trylock();
+
+    /** Unlock the mutex that has previously been locked by the same thread
+      @return  status code that indicates the execution status of the function.
+     */
+    osStatus unlock();
+
+    ~Mutex();
+
+private:
+    osMutexId _osMutexId;
+    osMutexDef_t _osMutexDef;
+#ifdef CMSIS_OS_RTX
+#if defined(__MBED_CMSIS_RTOS_CA9) || defined(__MBED_CMSIS_RTOS_CM)
+    int32_t _mutex_data[4];
+#else
+    int32_t _mutex_data[3];
+#endif
+#endif
+};
+
+}
+#endif
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtos/Queue.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/Queue.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,85 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef QUEUE_H
+#define QUEUE_H
+
+#include <stdint.h>
+#include <string.h>
+
+#include "cmsis_os.h"
+#include "platform/mbed_error.h"
+
+namespace rtos {
+/** \addtogroup rtos */
+/** @{*/
+
+/** The Queue class allow to control, send, receive, or wait for messages.
+ A message can be a integer or pointer value  to a certain type T that is send
+ to a thread or interrupt service routine.
+  @tparam  T         data type of a single message element.
+  @tparam  queue_sz  maximum number of messages in queue.
+*/
+template<typename T, uint32_t queue_sz>
+class Queue {
+public:
+    /** Create and initialise a message Queue. */
+    Queue() {
+    #ifdef CMSIS_OS_RTX
+        memset(_queue_q, 0, sizeof(_queue_q));
+        _queue_def.pool = _queue_q;
+        _queue_def.queue_sz = queue_sz;
+    #endif
+        _queue_id = osMessageCreate(&_queue_def, NULL);
+        if (_queue_id == NULL) {
+            error("Error initialising the queue object\n");
+        }
+    }
+
+    /** Put a message in a Queue.
+      @param   data      message pointer.
+      @param   millisec  timeout value or 0 in case of no time-out. (default: 0)
+      @return  status code that indicates the execution status of the function.
+    */
+    osStatus put(T* data, uint32_t millisec=0) {
+        return osMessagePut(_queue_id, (uint32_t)data, millisec);
+    }
+
+    /** Get a message or Wait for a message from a Queue.
+      @param   millisec  timeout value or 0 in case of no time-out. (default: osWaitForever).
+      @return  event information that includes the message and the status code.
+    */
+    osEvent get(uint32_t millisec=osWaitForever) {
+        return osMessageGet(_queue_id, millisec);
+    }
+
+private:
+    osMessageQId    _queue_id;
+    osMessageQDef_t _queue_def;
+#ifdef CMSIS_OS_RTX
+    uint32_t        _queue_q[4+(queue_sz)];
+#endif
+};
+
+}
+#endif
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtos/RtosTimer.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/RtosTimer.cpp	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,55 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "rtos/RtosTimer.h"
+
+#include <string.h>
+
+#include "mbed.h"
+#include "cmsis_os.h"
+#include "platform/mbed_error.h"
+
+namespace rtos {
+
+void RtosTimer::constructor(mbed::Callback<void()> func, os_timer_type type) {
+#ifdef CMSIS_OS_RTX
+    _timer.ptimer = (void (*)(const void *))Callback<void()>::thunk;
+
+    memset(_timer_data, 0, sizeof(_timer_data));
+    _timer.timer = _timer_data;
+#endif
+    _function = func;
+    _timer_id = osTimerCreate(&_timer, type, &_function);
+}
+
+osStatus RtosTimer::start(uint32_t millisec) {
+    return osTimerStart(_timer_id, millisec);
+}
+
+osStatus RtosTimer::stop(void) {
+    return osTimerStop(_timer_id);
+}
+
+RtosTimer::~RtosTimer() {
+    osTimerDelete(_timer_id);
+}
+
+}
diff -r 000000000000 -r a7c449cd2d5a rtos/RtosTimer.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/RtosTimer.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,111 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef RTOS_TIMER_H
+#define RTOS_TIMER_H
+
+#include <stdint.h>
+#include "cmsis_os.h"
+#include "platform/Callback.h"
+#include "platform/toolchain.h"
+
+namespace rtos {
+/** \addtogroup rtos */
+/** @{*/
+
+/** The RtosTimer class allow creating and and controlling of timer functions in the system.
+ A timer function is called when a time period expires whereby both on-shot and
+ periodic timers are possible. A timer can be started, restarted, or stopped.
+
+ Timers are handled in the thread osTimerThread.
+ Callback functions run under control of this thread and may use CMSIS-RTOS API calls.
+*/
+class RtosTimer {
+public:
+    /** Create timer.
+      @param   func      function to be executed by this timer.
+      @param   type      osTimerOnce for one-shot or osTimerPeriodic for periodic behaviour. (default: osTimerPeriodic)
+      @param   argument  argument to the timer call back function. (default: NULL)
+      @deprecated Replaced with RtosTimer(Callback<void()>, os_timer_type)
+     */
+    MBED_DEPRECATED_SINCE("mbed-os-5.1",
+        "Replaced with RtosTimer(Callback<void()>, os_timer_type)")
+    RtosTimer(void (*func)(void const *argument), os_timer_type type=osTimerPeriodic, void *argument=NULL) {
+        constructor(mbed::callback((void (*)(void *))func, argument), type);
+    }
+    
+    /** Create timer.
+      @param   func      function to be executed by this timer.
+      @param   type      osTimerOnce for one-shot or osTimerPeriodic for periodic behaviour. (default: osTimerPeriodic)
+    */
+    RtosTimer(mbed::Callback<void()> func, os_timer_type type=osTimerPeriodic) {
+        constructor(func, type);
+    }
+    
+    /** Create timer.
+      @param   obj       pointer to the object to call the member function on.
+      @param   method    member function to be executed by this timer.
+      @param   type      osTimerOnce for one-shot or osTimerPeriodic for periodic behaviour. (default: osTimerPeriodic)
+      @deprecated
+          The RtosTimer constructor does not support cv-qualifiers. Replaced by
+          RtosTimer(callback(obj, method), os_timer_type).
+    */
+    template <typename T, typename M>
+    MBED_DEPRECATED_SINCE("mbed-os-5.1",
+        "The RtosTimer constructor does not support cv-qualifiers. Replaced by "
+        "RtosTimer(callback(obj, method), os_timer_type).")
+    RtosTimer(T *obj, M method, os_timer_type type=osTimerPeriodic) {
+        constructor(mbed::callback(obj, method), type);
+    }
+
+    /** Stop the timer.
+      @return  status code that indicates the execution status of the function.
+    */
+    osStatus stop(void);
+
+    /** Start the timer.
+      @param   millisec  time delay value of the timer.
+      @return  status code that indicates the execution status of the function.
+    */
+    osStatus start(uint32_t millisec);
+
+    ~RtosTimer();
+
+private:
+    // Required to share definitions without
+    // delegated constructors
+    void constructor(mbed::Callback<void()> func, os_timer_type type);
+    
+    mbed::Callback<void()> _function;
+    osTimerId _timer_id;
+    osTimerDef_t _timer;
+#if defined(CMSIS_OS_RTX) && !defined(__MBED_CMSIS_RTOS_CM)
+    uint32_t _timer_data[5];
+#else
+    uint32_t _timer_data[6];
+#endif
+};
+
+}
+
+#endif
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtos/Semaphore.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/Semaphore.cpp	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,48 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "rtos/Semaphore.h"
+
+#include <string.h>
+
+namespace rtos {
+
+Semaphore::Semaphore(int32_t count) {
+#ifdef CMSIS_OS_RTX
+    memset(_semaphore_data, 0, sizeof(_semaphore_data));
+    _osSemaphoreDef.semaphore = _semaphore_data;
+#endif
+    _osSemaphoreId = osSemaphoreCreate(&_osSemaphoreDef, count);
+}
+
+int32_t Semaphore::wait(uint32_t millisec) {
+    return osSemaphoreWait(_osSemaphoreId, millisec);
+}
+
+osStatus Semaphore::release(void) {
+    return osSemaphoreRelease(_osSemaphoreId);
+}
+
+Semaphore::~Semaphore() {
+    osSemaphoreDelete(_osSemaphoreId);
+}
+
+}
diff -r 000000000000 -r a7c449cd2d5a rtos/Semaphore.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/Semaphore.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,64 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef SEMAPHORE_H
+#define SEMAPHORE_H
+
+#include <stdint.h>
+#include "cmsis_os.h"
+
+namespace rtos {
+/** \addtogroup rtos */
+/** @{*/
+
+/** The Semaphore class is used to manage and protect access to a set of shared resources. */
+class Semaphore {
+public:
+    /** Create and Initialize a Semaphore object used for managing resources.
+      @param number of available resources; maximum index value is (count-1). (default: 0).
+    */
+    Semaphore(int32_t count=0);
+
+    /** Wait until a Semaphore resource becomes available.
+      @param   millisec  timeout value or 0 in case of no time-out. (default: osWaitForever).
+      @return  number of available tokens, or -1 in case of incorrect parameters
+    */
+    int32_t wait(uint32_t millisec=osWaitForever);
+
+    /** Release a Semaphore resource that was obtain with Semaphore::wait.
+      @return  status code that indicates the execution status of the function.
+    */
+    osStatus release(void);
+
+    ~Semaphore();
+
+private:
+    osSemaphoreId _osSemaphoreId;
+    osSemaphoreDef_t _osSemaphoreDef;
+#ifdef CMSIS_OS_RTX
+    uint32_t _semaphore_data[2];
+#endif
+};
+
+}
+#endif
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtos/Thread.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/Thread.cpp	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,374 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "rtos/Thread.h"
+
+#include "mbed.h"
+#include "rtos/rtos_idle.h"
+
+// rt_tid2ptcb is an internal function which we exposed to get TCB for thread id
+#undef NULL  //Workaround for conflicting macros in rt_TypeDef.h and stdio.h
+#include "rt_TypeDef.h"
+
+extern "C" P_TCB rt_tid2ptcb(osThreadId thread_id);
+
+
+static void (*terminate_hook)(osThreadId id) = 0;
+extern "C" void thread_terminate_hook(osThreadId id)
+{
+    if (terminate_hook != (void (*)(osThreadId))NULL) {
+        terminate_hook(id);
+    }
+}
+
+namespace rtos {
+
+void Thread::constructor(osPriority priority,
+        uint32_t stack_size, unsigned char *stack_pointer) {
+    _tid = 0;
+    _dynamic_stack = (stack_pointer == NULL);
+
+#if defined(__MBED_CMSIS_RTOS_CA9) || defined(__MBED_CMSIS_RTOS_CM)
+    _thread_def.tpriority = priority;
+    _thread_def.stacksize = stack_size;
+    _thread_def.stack_pointer = (uint32_t*)stack_pointer;
+#endif
+}
+
+void Thread::constructor(Callback<void()> task,
+        osPriority priority, uint32_t stack_size, unsigned char *stack_pointer) {
+    constructor(priority, stack_size, stack_pointer);
+
+    switch (start(task)) {
+        case osErrorResource:
+            error("OS ran out of threads!\n");
+            break;
+        case osErrorParameter:
+            error("Thread already running!\n");
+            break;
+        case osErrorNoMemory:
+            error("Error allocating the stack memory\n");
+        default:
+            break;
+    }
+}
+
+osStatus Thread::start(Callback<void()> task) {
+    _mutex.lock();
+
+    if (_tid != 0) {
+        _mutex.unlock();
+        return osErrorParameter;
+    }
+
+#if defined(__MBED_CMSIS_RTOS_CA9) || defined(__MBED_CMSIS_RTOS_CM)
+    _thread_def.pthread = Thread::_thunk;
+    if (_thread_def.stack_pointer == NULL) {
+        _thread_def.stack_pointer = new uint32_t[_thread_def.stacksize/sizeof(uint32_t)];
+        MBED_ASSERT(_thread_def.stack_pointer != NULL);
+    }
+
+    //Fill the stack with a magic word for maximum usage checking
+    for (uint32_t i = 0; i < (_thread_def.stacksize / sizeof(uint32_t)); i++) {
+        _thread_def.stack_pointer[i] = 0xE25A2EA5;
+    }
+#endif
+    _task = task;
+    _tid = osThreadCreate(&_thread_def, this);
+    if (_tid == NULL) {
+        if (_dynamic_stack) {
+            delete[] (_thread_def.stack_pointer);
+            _thread_def.stack_pointer = (uint32_t*)NULL;
+        }
+        _mutex.unlock();
+        _join_sem.release();
+        return osErrorResource;
+    }
+
+    _mutex.unlock();
+    return osOK;
+}
+
+osStatus Thread::terminate() {
+    osStatus ret;
+    _mutex.lock();
+
+    // Set the Thread's tid to NULL and
+    // release the semaphore before terminating
+    // since this thread could be terminating itself
+    osThreadId local_id = _tid;
+    _join_sem.release();
+    _tid = (osThreadId)NULL;
+
+    ret = osThreadTerminate(local_id);
+
+    _mutex.unlock();
+    return ret;
+}
+
+osStatus Thread::join() {
+    int32_t ret = _join_sem.wait();
+    if (ret < 0) {
+        return osErrorOS;
+    }
+
+    // The semaphore has been released so this thread is being
+    // terminated or has been terminated. Once the mutex has
+    // been locked it is ensured that the thread is deleted.
+    _mutex.lock();
+    MBED_ASSERT(NULL == _tid);
+    _mutex.unlock();
+
+    // Release sem so any other threads joining this thread wake up
+    _join_sem.release();
+    return osOK;
+}
+
+osStatus Thread::set_priority(osPriority priority) {
+    osStatus ret;
+    _mutex.lock();
+
+    ret = osThreadSetPriority(_tid, priority);
+
+    _mutex.unlock();
+    return ret;
+}
+
+osPriority Thread::get_priority() {
+    osPriority ret;
+    _mutex.lock();
+
+    ret = osThreadGetPriority(_tid);
+
+    _mutex.unlock();
+    return ret;
+}
+
+int32_t Thread::signal_set(int32_t signals) {
+    // osSignalSet is thread safe as long as the underlying
+    // thread does not get terminated or return from main
+    return osSignalSet(_tid, signals);
+}
+
+int32_t Thread::signal_clr(int32_t signals) {
+    // osSignalClear is thread safe as long as the underlying
+    // thread does not get terminated or return from main
+    return osSignalClear(_tid, signals);
+}
+
+Thread::State Thread::get_state() {
+#if !defined(__MBED_CMSIS_RTOS_CA9) && !defined(__MBED_CMSIS_RTOS_CM)
+#ifdef CMSIS_OS_RTX
+    State status = Deleted;
+    _mutex.lock();
+
+    if (_tid != NULL) {
+        status = (State)_thread_def.tcb.state;
+    }
+
+    _mutex.unlock();
+    return status;
+#endif
+#else
+    State status = Deleted;
+    _mutex.lock();
+
+    if (_tid != NULL) {
+        status = (State)osThreadGetState(_tid);
+    }
+
+    _mutex.unlock();
+    return status;
+#endif
+}
+
+uint32_t Thread::stack_size() {
+#ifndef __MBED_CMSIS_RTOS_CA9
+#if defined(CMSIS_OS_RTX) && !defined(__MBED_CMSIS_RTOS_CM)
+    uint32_t size = 0;
+    _mutex.lock();
+
+    if (_tid != NULL) {
+        size = _thread_def.tcb.priv_stack;
+    }
+
+    _mutex.unlock();
+    return size;
+#else
+    uint32_t size = 0;
+    _mutex.lock();
+
+    if (_tid != NULL) {
+        P_TCB tcb = rt_tid2ptcb(_tid);
+        size = tcb->priv_stack;
+    }
+
+    _mutex.unlock();
+    return size;
+#endif
+#else
+    return 0;
+#endif
+}
+
+uint32_t Thread::free_stack() {
+#ifndef __MBED_CMSIS_RTOS_CA9
+#if defined(CMSIS_OS_RTX) && !defined(__MBED_CMSIS_RTOS_CM)
+    uint32_t size = 0;
+    _mutex.lock();
+
+    if (_tid != NULL) {
+        uint32_t bottom = (uint32_t)_thread_def.tcb.stack;
+        size = _thread_def.tcb.tsk_stack - bottom;
+    }
+
+    _mutex.unlock();
+    return size;
+#else
+    uint32_t size = 0;
+    _mutex.lock();
+
+    if (_tid != NULL) {
+        P_TCB tcb = rt_tid2ptcb(_tid);
+        uint32_t bottom = (uint32_t)tcb->stack;
+        size = tcb->tsk_stack - bottom;
+    }
+
+    _mutex.unlock();
+    return size;
+#endif
+#else
+    return 0;
+#endif
+}
+
+uint32_t Thread::used_stack() {
+#ifndef __MBED_CMSIS_RTOS_CA9
+#if defined(CMSIS_OS_RTX) && !defined(__MBED_CMSIS_RTOS_CM)
+    uint32_t size = 0;
+    _mutex.lock();
+
+    if (_tid != NULL) {
+        uint32_t top = (uint32_t)_thread_def.tcb.stack + _thread_def.tcb.priv_stack;
+        size = top - _thread_def.tcb.tsk_stack;
+    }
+
+    _mutex.unlock();
+    return size;
+#else
+    uint32_t size = 0;
+    _mutex.lock();
+
+    if (_tid != NULL) {
+        P_TCB tcb = rt_tid2ptcb(_tid);
+        uint32_t top = (uint32_t)tcb->stack + tcb->priv_stack;
+        size =  top - tcb->tsk_stack;
+    }
+
+    _mutex.unlock();
+    return size;
+#endif
+#else
+    return 0;
+#endif
+}
+
+uint32_t Thread::max_stack() {
+#ifndef __MBED_CMSIS_RTOS_CA9
+#if defined(CMSIS_OS_RTX) && !defined(__MBED_CMSIS_RTOS_CM)
+    uint32_t size = 0;
+    _mutex.lock();
+
+    if (_tid != NULL) {
+        uint32_t high_mark = 0;
+        while (_thread_def.tcb.stack[high_mark] == 0xE25A2EA5)
+            high_mark++;
+        size = _thread_def.tcb.priv_stack - (high_mark * 4);
+    }
+
+    _mutex.unlock();
+    return size;
+#else
+    uint32_t size = 0;
+    _mutex.lock();
+
+    if (_tid != NULL) {
+        P_TCB tcb = rt_tid2ptcb(_tid);
+        uint32_t high_mark = 0;
+        while (tcb->stack[high_mark] == 0xE25A2EA5)
+            high_mark++;
+        size = tcb->priv_stack - (high_mark * 4);
+    }
+
+    _mutex.unlock();
+    return size;
+#endif
+#else
+    return 0;
+#endif
+}
+
+osEvent Thread::signal_wait(int32_t signals, uint32_t millisec) {
+    return osSignalWait(signals, millisec);
+}
+
+osStatus Thread::wait(uint32_t millisec) {
+    return osDelay(millisec);
+}
+
+osStatus Thread::yield() {
+    return osThreadYield();
+}
+
+osThreadId Thread::gettid() {
+    return osThreadGetId();
+}
+
+void Thread::attach_idle_hook(void (*fptr)(void)) {
+    rtos_attach_idle_hook(fptr);
+}
+
+void Thread::attach_terminate_hook(void (*fptr)(osThreadId id)) {
+    terminate_hook = fptr;
+}
+
+Thread::~Thread() {
+    // terminate is thread safe
+    terminate();
+#ifdef __MBED_CMSIS_RTOS_CM
+    if (_dynamic_stack) {
+        delete[] (_thread_def.stack_pointer);
+        _thread_def.stack_pointer = (uint32_t*)NULL;
+    }
+#endif
+}
+
+void Thread::_thunk(const void * thread_ptr)
+{
+    Thread *t = (Thread*)thread_ptr;
+    t->_task();
+    t->_mutex.lock();
+    t->_tid = (osThreadId)NULL;
+    t->_join_sem.release();
+    // rtos will release the mutex automatically
+}
+
+}
diff -r 000000000000 -r a7c449cd2d5a rtos/Thread.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/Thread.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,355 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef THREAD_H
+#define THREAD_H
+
+#include <stdint.h>
+#include "cmsis_os.h"
+#include "platform/Callback.h"
+#include "platform/toolchain.h"
+#include "rtos/Semaphore.h"
+#include "rtos/Mutex.h"
+
+namespace rtos {
+/** \addtogroup rtos */
+/** @{*/
+
+/** The Thread class allow defining, creating, and controlling thread functions in the system.
+ *
+ *  Example:
+ *  @code
+ *  #include "mbed.h"
+ *  #include "rtos.h"
+ *
+ *  Thread thread;
+ *  DigitalOut led1(LED1);
+ *  volatile bool running = true;
+ *
+ *  // Blink function toggles the led in a long running loop
+ *  void blink(DigitalOut *led) {
+ *      while (running) {
+ *          *led = !*led;
+ *          Thread::wait(1000);
+ *      }
+ *  }
+ *
+ *  // Spawns a thread to run blink for 5 seconds
+ *  int main() {
+ *      thread.start(led1, blink);
+ *      Thread::wait(5000);
+ *      running = false;
+ *      thread.join();
+ *  }
+ *  @endcode
+ */
+class Thread {
+public:
+    /** Allocate a new thread without starting execution
+      @param   priority       initial priority of the thread function. (default: osPriorityNormal).
+      @param   stack_size      stack size (in bytes) requirements for the thread function. (default: DEFAULT_STACK_SIZE).
+      @param   stack_pointer  pointer to the stack area to be used by this thread (default: NULL).
+    */
+    Thread(osPriority priority=osPriorityNormal,
+           uint32_t stack_size=DEFAULT_STACK_SIZE,
+           unsigned char *stack_pointer=NULL) {
+        constructor(priority, stack_size, stack_pointer);
+    }
+
+    /** Create a new thread, and start it executing the specified function.
+      @param   task           function to be executed by this thread.
+      @param   argument       pointer that is passed to the thread function as start argument. (default: NULL).
+      @param   priority       initial priority of the thread function. (default: osPriorityNormal).
+      @param   stack_size      stack size (in bytes) requirements for the thread function. (default: DEFAULT_STACK_SIZE).
+      @param   stack_pointer  pointer to the stack area to be used by this thread (default: NULL).
+      @deprecated
+        Thread-spawning constructors hide errors. Replaced by thread.start(task).
+
+        @code
+        Thread thread(priority, stack_size, stack_pointer);
+
+        osStatus status = thread.start(task);
+        if (status != osOK) {
+            error("oh no!");
+        }
+        @endcode
+    */
+    MBED_DEPRECATED_SINCE("mbed-os-5.1",
+        "Thread-spawning constructors hide errors. "
+        "Replaced by thread.start(task).")
+    Thread(mbed::Callback<void()> task,
+           osPriority priority=osPriorityNormal,
+           uint32_t stack_size=DEFAULT_STACK_SIZE,
+           unsigned char *stack_pointer=NULL) {
+        constructor(task, priority, stack_size, stack_pointer);
+    }
+
+    /** Create a new thread, and start it executing the specified function.
+      @param   obj            argument to task.
+      @param   method         function to be executed by this thread.
+      @param   argument       pointer that is passed to the thread function as start argument. (default: NULL).
+      @param   priority       initial priority of the thread function. (default: osPriorityNormal).
+      @param   stack_size      stack size (in bytes) requirements for the thread function. (default: DEFAULT_STACK_SIZE).
+      @param   stack_pointer  pointer to the stack area to be used by this thread (default: NULL).
+      @deprecated
+        Thread-spawning constructors hide errors. Replaced by thread.start(callback(task, argument)).
+
+        @code
+        Thread thread(priority, stack_size, stack_pointer);
+
+        osStatus status = thread.start(callback(task, argument));
+        if (status != osOK) {
+            error("oh no!");
+        }
+        @endcode
+    */
+    template <typename T>
+    MBED_DEPRECATED_SINCE("mbed-os-5.1",
+        "Thread-spawning constructors hide errors. "
+        "Replaced by thread.start(callback(task, argument)).")
+    Thread(T *argument, void (T::*task)(),
+           osPriority priority=osPriorityNormal,
+           uint32_t stack_size=DEFAULT_STACK_SIZE,
+           unsigned char *stack_pointer=NULL) {
+        constructor(mbed::callback(task, argument),
+                    priority, stack_size, stack_pointer);
+    }
+
+    /** Create a new thread, and start it executing the specified function.
+      @param   obj            argument to task.
+      @param   method         function to be executed by this thread.
+      @param   argument       pointer that is passed to the thread function as start argument. (default: NULL).
+      @param   priority       initial priority of the thread function. (default: osPriorityNormal).
+      @param   stack_size      stack size (in bytes) requirements for the thread function. (default: DEFAULT_STACK_SIZE).
+      @param   stack_pointer  pointer to the stack area to be used by this thread (default: NULL).
+      @deprecated
+        Thread-spawning constructors hide errors. Replaced by thread.start(callback(task, argument)).
+
+        @code
+        Thread thread(priority, stack_size, stack_pointer);
+
+        osStatus status = thread.start(callback(task, argument));
+        if (status != osOK) {
+            error("oh no!");
+        }
+        @endcode
+    */
+    template <typename T>
+    MBED_DEPRECATED_SINCE("mbed-os-5.1",
+        "Thread-spawning constructors hide errors. "
+        "Replaced by thread.start(callback(task, argument)).")
+    Thread(T *argument, void (*task)(T *),
+           osPriority priority=osPriorityNormal,
+           uint32_t stack_size=DEFAULT_STACK_SIZE,
+           unsigned char *stack_pointer=NULL) {
+        constructor(mbed::callback(task, argument),
+                    priority, stack_size, stack_pointer);
+    }
+
+    /** Create a new thread, and start it executing the specified function.
+        Provided for backwards compatibility
+      @param   task           function to be executed by this thread.
+      @param   argument       pointer that is passed to the thread function as start argument. (default: NULL).
+      @param   priority       initial priority of the thread function. (default: osPriorityNormal).
+      @param   stack_size      stack size (in bytes) requirements for the thread function. (default: DEFAULT_STACK_SIZE).
+      @param   stack_pointer  pointer to the stack area to be used by this thread (default: NULL).
+      @deprecated
+        Thread-spawning constructors hide errors. Replaced by thread.start(callback(task, argument)).
+
+        @code
+        Thread thread(priority, stack_size, stack_pointer);
+
+        osStatus status = thread.start(callback(task, argument));
+        if (status != osOK) {
+            error("oh no!");
+        }
+        @endcode
+    */
+    MBED_DEPRECATED_SINCE("mbed-os-5.1",
+        "Thread-spawning constructors hide errors. "
+        "Replaced by thread.start(callback(task, argument)).")
+    Thread(void (*task)(void const *argument), void *argument=NULL,
+           osPriority priority=osPriorityNormal,
+           uint32_t stack_size=DEFAULT_STACK_SIZE,
+           unsigned char *stack_pointer=NULL) {
+        constructor(mbed::callback((void (*)(void *))task, argument),
+                    priority, stack_size, stack_pointer);
+    }
+
+    /** Starts a thread executing the specified function.
+      @param   task           function to be executed by this thread.
+      @return  status code that indicates the execution status of the function.
+    */
+    osStatus start(mbed::Callback<void()> task);
+
+    /** Starts a thread executing the specified function.
+      @param   obj            argument to task
+      @param   method         function to be executed by this thread.
+      @return  status code that indicates the execution status of the function.
+      @deprecated
+          The start function does not support cv-qualifiers. Replaced by start(callback(obj, method)).
+    */
+    template <typename T, typename M>
+    MBED_DEPRECATED_SINCE("mbed-os-5.1",
+        "The start function does not support cv-qualifiers. "
+        "Replaced by thread.start(callback(obj, method)).")
+    osStatus start(T *obj, M method) {
+        return start(mbed::callback(obj, method));
+    }
+
+    /** Wait for thread to terminate
+      @return  status code that indicates the execution status of the function.
+      @note not callable from interrupt
+    */
+    osStatus join();
+
+    /** Terminate execution of a thread and remove it from Active Threads
+      @return  status code that indicates the execution status of the function.
+    */
+    osStatus terminate();
+
+    /** Set priority of an active thread
+      @param   priority  new priority value for the thread function.
+      @return  status code that indicates the execution status of the function.
+    */
+    osStatus set_priority(osPriority priority);
+
+    /** Get priority of an active thread
+      @return  current priority value of the thread function.
+    */
+    osPriority get_priority();
+
+    /** Set the specified Signal Flags of an active thread.
+      @param   signals  specifies the signal flags of the thread that should be set.
+      @return  previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters.
+    */
+    int32_t signal_set(int32_t signals);
+
+    /** Clears the specified Signal Flags of an active thread.
+      @param   signals  specifies the signal flags of the thread that should be cleared.
+      @return  resultant signal flags of the specified thread or 0x80000000 in case of incorrect parameters.
+    */
+    int32_t signal_clr(int32_t signals);
+
+    /** State of the Thread */
+    enum State {
+        Inactive,           /**< Not created or terminated */
+        Ready,              /**< Ready to run */
+        Running,            /**< Running */
+        WaitingDelay,       /**< Waiting for a delay to occur */
+        WaitingInterval,    /**< Waiting for an interval to occur */
+        WaitingOr,          /**< Waiting for one event in a set to occur */
+        WaitingAnd,         /**< Waiting for multiple events in a set to occur */
+        WaitingSemaphore,   /**< Waiting for a semaphore event to occur */
+        WaitingMailbox,     /**< Waiting for a mailbox event to occur */
+        WaitingMutex,       /**< Waiting for a mutex event to occur */
+
+        /* Not in sync with RTX below here */
+        Deleted,            /**< The task has been deleted */
+    };
+
+    /** State of this Thread
+      @return  the State of this Thread
+    */
+    State get_state();
+    
+    /** Get the total stack memory size for this Thread
+      @return  the total stack memory size in bytes
+    */
+    uint32_t stack_size();
+    
+    /** Get the currently unused stack memory for this Thread
+      @return  the currently unused stack memory in bytes
+    */
+    uint32_t free_stack();
+    
+    /** Get the currently used stack memory for this Thread
+      @return  the currently used stack memory in bytes
+    */
+    uint32_t used_stack();
+    
+    /** Get the maximum stack memory usage to date for this Thread
+      @return  the maximum stack memory usage to date in bytes
+    */
+    uint32_t max_stack();
+
+    /** Wait for one or more Signal Flags to become signaled for the current RUNNING thread.
+      @param   signals   wait until all specified signal flags set or 0 for any single signal flag.
+      @param   millisec  timeout value or 0 in case of no time-out. (default: osWaitForever).
+      @return  event flag information or error code.
+      @note not callable from interrupt
+    */
+    static osEvent signal_wait(int32_t signals, uint32_t millisec=osWaitForever);
+
+    /** Wait for a specified time period in millisec:
+      @param   millisec  time delay value
+      @return  status code that indicates the execution status of the function.
+      @note not callable from interrupt
+    */
+    static osStatus wait(uint32_t millisec);
+
+    /** Pass control to next thread that is in state READY.
+      @return  status code that indicates the execution status of the function.
+      @note not callable from interrupt
+    */
+    static osStatus yield();
+
+    /** Get the thread id of the current running thread.
+      @return  thread ID for reference by other functions or NULL in case of error.
+    */
+    static osThreadId gettid();
+    
+    /** Attach a function to be called by the RTOS idle task
+      @param   fptr  pointer to the function to be called
+    */
+    static void attach_idle_hook(void (*fptr)(void));
+
+    /** Attach a function to be called when a task is killed
+      @param   fptr  pointer to the function to be called
+    */
+    static void attach_terminate_hook(void (*fptr)(osThreadId id));
+
+    virtual ~Thread();
+
+private:
+    // Required to share definitions without
+    // delegated constructors
+    void constructor(osPriority priority=osPriorityNormal,
+                     uint32_t stack_size=DEFAULT_STACK_SIZE,
+                     unsigned char *stack_pointer=NULL);
+    void constructor(mbed::Callback<void()> task,
+                     osPriority priority=osPriorityNormal,
+                     uint32_t stack_size=DEFAULT_STACK_SIZE,
+                     unsigned char *stack_pointer=NULL);
+    static void _thunk(const void * thread_ptr);
+
+    mbed::Callback<void()> _task;
+    osThreadId _tid;
+    osThreadDef_t _thread_def;
+    bool _dynamic_stack;
+    Semaphore _join_sem;
+    Mutex _mutex;
+};
+
+}
+#endif
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtos/rtos.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/rtos.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,49 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef RTOS_H
+#define RTOS_H
+
+#include "rtos/Thread.h"
+#include "rtos/Mutex.h"
+#include "rtos/RtosTimer.h"
+#include "rtos/Semaphore.h"
+#include "rtos/Mail.h"
+#include "rtos/MemoryPool.h"
+#include "rtos/Queue.h"
+
+using namespace rtos;
+
+/* Get mbed lib version number, as RTOS depends on mbed lib features
+   like mbed_error, Callback and others.
+*/
+#include "mbed.h"
+
+#if (MBED_LIBRARY_VERSION < 122)
+#error "This version of RTOS requires mbed library version > 121"
+#endif
+
+#endif
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtos/rtos_idle.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/rtos_idle.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,51 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "rtos/rtos_idle.h"
+
+static void default_idle_hook(void)
+{
+    /* Sleep: ideally, we should put the chip to sleep.
+     Unfortunately, this usually requires disconnecting the interface chip (debugger).
+     This can be done, but it would break the local file system.
+    */
+    // sleep();
+}
+static void (*idle_hook_fptr)(void) = &default_idle_hook;
+
+void rtos_attach_idle_hook(void (*fptr)(void))
+{
+    //Attach the specified idle hook, or the default idle hook in case of a NULL pointer
+    if (fptr != NULL) {
+        idle_hook_fptr = fptr;
+    } else {
+        idle_hook_fptr = default_idle_hook;
+    }
+}
+
+void rtos_idle_loop(void)
+{
+    //Continuously call the idle hook function pointer
+    while (1) {
+        idle_hook_fptr();
+    }
+}
diff -r 000000000000 -r a7c449cd2d5a rtos/rtos_idle.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtos/rtos_idle.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,42 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2012 ARM Limited
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef RTOS_IDLE_H
+#define RTOS_IDLE_H
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void rtos_attach_idle_hook(void (*fptr)(void));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/ARM7/TOOLCHAIN_GCC/HAL_CM0.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/ARM7/TOOLCHAIN_GCC/HAL_CM0.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,329 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM0.S
+ *      Purpose: Hardware Abstraction Layer for ARM7TDMI
+ *      Rev.:    V1.0
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used 
+ *    to endorse or promote products derived from this software without 
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+        .file   "HAL_CM0.S"
+        .syntax unified
+
+        .equ    TCB_TSTACK, 40
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+        .arm
+
+        .section ".text"
+        .align  2
+
+/*-------------------------- Save Context --------------------------------*/
+/* MUST be called the first */
+.macro SaveContext
+
+      /* Push R0 as we are going to use the register. */                                      \
+        STMDB  SP!, {R0}
+
+        /* Set R0 to SP(user) */
+        STMDB  SP,{SP}^
+        NOP
+        SUB    SP, SP, #4
+        LDMIA  SP!,{R0}
+
+        /* Push the LR return address onto the user stack. */
+        STMDB  R0!, {LR}
+
+        /* Now we have saved LR we can use it instead of R0. */
+        MOV    LR, R0
+
+        /* Pop R0 so we can save it onto the system mode stack. */
+        LDMIA  SP!, {R0}
+
+        /* Push all the system mode registers onto the task stack. */
+        STMDB  LR,{R0-R12,LR}^      /* LR can not be changed because  user's LR is used*/
+        NOP                         /* pass 1 cycle before changing LR */
+        SUB    LR, LR, #14*4        /* change LR now -15 dwords (R0-R14)*/
+
+        /* Push the SPSR onto the task stack. */
+        MRS    R0, SPSR
+        STMDB  LR!, {R0}
+
+        /* Store the new top of stack for the task. */
+        LDR    R0,=os_tsk
+        LDR    R0, [R0]             /* R0 = (tcb) os_tsk.run */
+        STR    LR, [R0, TCB_TSTACK] /* tcb.tsk_stack = SP(user) */
+.endm
+
+/*-------------------------- Restore Context --------------------------------*/
+        .type   RestoreContext, %function
+        .global RestoreContext
+RestoreContext:
+        .fnstart
+        .cantunwind
+    /* Set the LR to the task stack. */
+    LDR     R0,=os_tsk
+    LDR     R1, [R0, 4]              /* R1 = (tcb) os_tsk.new */
+    STR     R1, [R0]                 /* os_tsk.run = os_tsk_newk */
+    LDR     LR, [R1, TCB_TSTACK]     /* LR = tcb.tsk_stack */
+
+    /* Get the SPSR from the stack. */
+    LDMFD   LR!, {R0}                /*  SPSR */
+    MSR     SPSR, R0
+
+    /* Restore all system mode registers for the task. */
+    LDMFD  LR, {R0-R12,LR}^
+    NOP
+
+    ADD    LR, LR, 15*4               /* increase stack pointer */
+    /* Set SP(user) to LR */
+    STMDB  SP!,{LR}
+    LDMIA  SP,{SP}^
+    NOP
+    ADD    SP, SP, #4
+
+    /* Restore the return address. */
+    LDR    LR, [LR,#-4]                   /* last dword is task's PC register */
+
+    /* And return - correcting the offset in the LR to obtain the */
+    /* correct address. */
+    SUBS    PC, LR, #4
+
+/*-------------------------- End --------------------------------*/
+ .fnend
+        .size   RestoreContext, .-RestoreContext
+
+
+
+/*--------------------------- rt_set_PSP ------------------------------------*/
+
+#       void rt_set_PSP (U32 stack);
+
+        .type   rt_set_PSP, %function
+        .global rt_set_PSP
+rt_set_PSP:
+        .fnstart
+        .cantunwind
+
+        MOV     SP,R0
+        BX      LR
+
+        .fnend
+        .size   rt_set_PSP, .-rt_set_PSP
+
+
+/*--------------------------- rt_get_PSP ------------------------------------*/
+
+#       U32 rt_get_PSP (void);
+
+        .type   rt_get_PSP, %function
+        .global rt_get_PSP
+rt_get_PSP:
+        .fnstart
+        .cantunwind
+
+        MOV     R0,SP
+        BX      LR
+
+        .fnend
+        .size   rt_get_PSP, .-rt_get_PSP
+
+
+
+/*--------------------------- _alloc_box ------------------------------------*/
+
+#      void *_alloc_box (void *box_mem);
+       /* Function wrapper for Unprivileged/Privileged mode. */
+
+        .type   _alloc_box, %function
+        .global _alloc_box
+_alloc_box:
+        .fnstart
+        .cantunwind
+
+        LDR     R3,=rt_alloc_box
+        MOV     R12, R3
+        MRS     R3, CPSR
+        AND     R3, 0x1F
+        CMP     R3, 0x12 /* IRQ mode*/
+        BNE     PrivilegedA
+        CMP     R3, 0x1F /* System mode*/
+        BNE     PrivilegedA
+        SVC     0
+        BX      LR
+PrivilegedA:
+        BX      R12
+
+        .fnend
+        .size   _alloc_box, .-_alloc_box
+
+
+/*--------------------------- _free_box -------------------------------------*/
+
+#       int _free_box (void *box_mem, void *box);
+        /* Function wrapper for Unprivileged/Privileged mode. */
+
+        .type   _free_box, %function
+        .global _free_box
+_free_box:
+        .fnstart
+        .cantunwind
+
+        LDR     R3,=rt_free_box
+        MOV     R12, R3
+        MRS     R3, CPSR
+        AND     R3, 0x1F
+        CMP     R3, 0x12 /* IRQ mode*/
+        BNE     PrivilegedA
+        CMP     R3, 0x1F /* System mode*/
+        BNE     PrivilegedA
+        SVC     0
+        BX      LR
+PrivilegedF:
+        BX      R12
+
+        .fnend
+        .size   _free_box, .-_free_box
+
+
+/*-------------------------- SVC_Handler ------------------------------------*/
+
+#       void SVC_Handler (void);
+
+        .type   SVC_Handler, %function
+        .global SVC_Handler
+SVC_Handler:
+        .fnstart
+        .cantunwind
+        /* Within an IRQ ISR the link register has an offset from the true return
+        address, but an SWI ISR does not.  Add the offset manually so the same
+        ISR return code can be used in both cases. */
+
+        STMFD   SP!, {R0,LR}          /* Store registers. */
+        ADD     LR, LR, #4            /* Align LR with IRQ handler */
+        SaveContext
+        MOV     R11, LR               /* Save Task Stack Pointer */
+        LDMFD   SP!, {R0,LR}          /* Restore registers and return. */
+        STMFD   SP!, {R11}            /* Save Task Stack Pointer */
+
+        LDR     R5, [LR,#-4]          /* Calculate address of SWI instruction and load it into r5. */
+        BIC     R5, R5,#0xff000000    /* Mask off top 8 bits of instruction to give SWI number. */
+
+        CMP     R5, #0
+        BNE     SVC_User                /* User SVC Number > 0 */
+        MOV     LR, PC                  /* set LR to return address */
+        BX      R12                     /* Call SVC Function */
+
+        LDMFD   SP!, {R11}              /* Load Task Stack Pointer */
+        STMIB   R11!, {R0-R3}           /* Store return values to Task stack */
+
+SVC_Exit:
+        B       RestoreContext           /* return to the task */
+
+        /*------------------- User SVC ------------------------------*/
+
+SVC_User:
+        LDR     R6,=SVC_Count
+        LDR     R6,[R6]
+        CMP     R5,R6
+        LDMFDHI   SP!, {R11}
+        BHI     SVC_Done                /* Overflow */
+
+        LDR     R4,=SVC_Table - 4
+        LSLS    R5,R5,#2
+        LDR     R4,[R4,R5]              /* Load SVC Function Address */
+        /*  R0-R3,R12  are unchanged */
+        MOV     LR, PC                  /* set LR to return address */
+        BX      R4                      /* Call SVC Function */
+
+        LDMFD   SP!, {R11}              /* Load Task Stack Pointer */
+        BEQ     SVC_Exit                /* no need in return values */
+
+        STMIB   R11!, {R0-R3}           /* Store return values to Task stack */
+SVC_Done:
+        B       RestoreContext           /* return to the task */
+
+        .fnend
+        .size   SVC_Handler, .-SVC_Handler
+        
+
+/*-------------------------- IRQ_Handler ---------------------------------*/
+
+#       void IRQ_Handler (void);
+
+        .type   IRQ_Handler, %function
+        .global IRQ_Handler
+IRQ_Handler:
+        .fnstart
+        .cantunwind
+
+        SaveContext
+
+        MOV R0, #0xFFFFFF00
+        LDR R0, [R0]               /* Load address of raised IRQ handler*/
+
+        MOV LR, PC
+        BX  R0
+
+        MOV R0, #0xFFFFFF00
+        STR R0, [R0]              /* Clear interrupt */
+
+        B   RestoreContext
+
+        .fnend
+        .size   IRQ_Handler, .-IRQ_Handler
+
+/*-------------------------- SysTick_Handler --------------------------------*/
+
+#       void SysTick_Handler (void);
+
+        .type   SysTick_Handler, %function
+        .global SysTick_Handler
+SysTick_Handler:
+        .fnstart
+        .cantunwind
+
+        PUSH    {LR}
+        BL      rt_systick
+        POP     {LR}
+        BX      LR               /* return to IRQ handler */
+
+/*-------------------------- End --------------------------------*/
+ .fnend
+        .size   SysTick_Handler, .-SysTick_Handler
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+.end
\ No newline at end of file
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/ARM7/TOOLCHAIN_GCC/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/ARM7/TOOLCHAIN_GCC/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,56 @@
+;/*----------------------------------------------------------------------------
+; *      RL-ARM - RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.60
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used 
+; *    to endorse or promote products derived from this software without 
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+        .file   "SVC_Table.S"
+
+
+        .section ".svc_table"
+
+        .global  SVC_Table
+SVC_Table:
+/* Insert user SVC functions here. SVC 0 used by RTL Kernel. */
+#       .long   __SVC_1                 /* user SVC function */
+SVC_End:
+
+        .global  SVC_Count
+SVC_Count:
+        .long   (SVC_End-SVC_Table)/4
+
+
+        .end
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/HAL_CM.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/HAL_CM.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,161 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM.C
+ *      Purpose: Hardware Abstraction Layer for ARM7TDMI
+ *      Rev.:    V1.0
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Conf.h"
+#include "rt_HAL_CM.h"
+
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+#ifdef DBG_MSG
+BIT dbg_msg;
+#endif
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_init_stack ---------------------------------*/
+
+void rt_init_stack (P_TCB p_TCB, FUNCP task_body) {
+  /* Prepare TCB and saved context for a first time start of a task. */
+  U32 *stk,i,size;
+
+  /* Prepare a complete interrupt frame for first task start */
+  size = p_TCB->priv_stack >> 2;
+
+  /* Write to the top of stack. */
+  stk = &p_TCB->stack[size];
+
+  /* Auto correct to 8-byte ARM stack alignment. */
+  if ((U32)stk & 0x04) {
+    stk--;
+  }
+
+  stk -= 16;
+
+  /* Default xPSR and initial PC */
+  stk[15] = (U32)task_body + 4; /* add 4 byte offset because SUB PC, LR - 4 */
+  stk[0] = INITIAL_xPSR;
+
+  /* Clear R0-R13/LR registers. */
+  for (i = 1; i < 14; i++) {
+    stk[i] = 0;
+  }
+
+  /* Assign a void pointer to R0. */
+  stk[TCB_STACK_R0_OFFSET_DWORDS] = (U32)p_TCB->msg;
+
+  /* Initial Task stack pointer. */
+  p_TCB->tsk_stack = (U32)stk;
+
+  /* Task entry point. */
+  p_TCB->ptask = task_body;
+
+  /* Set a magic word for checking of stack overflow.
+   For the main thread (ID: 0x01) the stack is in a memory area shared with the
+   heap, therefore the last word of the stack is a moving target.
+   We want to do stack/heap collision detection instead.
+  */
+  if (p_TCB->task_id != 0x01)
+      p_TCB->stack[0] = MAGIC_WORD;
+}
+
+
+/*--------------------------- rt_ret_val ----------------------------------*/
+
+static __inline U32 *rt_ret_regs (P_TCB p_TCB) {
+  /* Get pointer to task return value registers (R0..R3) in Stack */
+
+  /* Stack Frame: CPSR,R0-R13,PC */
+  return (U32 *)(p_TCB->tsk_stack + TCB_STACK_R0_OFFSET_BYTES);
+}
+
+void rt_ret_val (P_TCB p_TCB, U32 v0) {
+  U32 *ret;
+
+  ret = rt_ret_regs(p_TCB);
+  ret[0] = v0;
+}
+
+void rt_ret_val2(P_TCB p_TCB, U32 v0, U32 v1) {
+  U32 *ret;
+
+  ret = rt_ret_regs(p_TCB);
+  ret[0] = v0;
+  ret[1] = v1;
+}
+
+
+/*--------------------------- dbg_init --------------------------------------*/
+
+#ifdef DBG_MSG
+void dbg_init (void) {
+  if ((DEMCR & DEMCR_TRCENA)     &&
+      (ITM_CONTROL & ITM_ITMENA) &&
+      (ITM_ENABLE & (1UL << 31))) {
+    dbg_msg = __TRUE;
+  }
+}
+#endif
+
+/*--------------------------- dbg_task_notify -------------------------------*/
+
+#ifdef DBG_MSG
+void dbg_task_notify (P_TCB p_tcb, BOOL create) {
+  while (ITM_PORT31_U32 == 0);
+  ITM_PORT31_U32 = (U32)p_tcb->ptask;
+  while (ITM_PORT31_U32 == 0);
+  ITM_PORT31_U16 = (create << 8) | p_tcb->task_id;
+}
+#endif
+
+/*--------------------------- dbg_task_switch -------------------------------*/
+
+#ifdef DBG_MSG
+void dbg_task_switch (U32 task_id) {
+  while (ITM_PORT31_U32 == 0);
+  ITM_PORT31_U8 = task_id;
+}
+#endif
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/RTX_CM_lib.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/RTX_CM_lib.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,401 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RTX_CM_LIB.H
+ *      Purpose: RTX Kernel System Configuration
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+#include "mbed_error.h"
+
+#if   defined (__CC_ARM)
+#pragma O3
+#define __USED __attribute__((used))
+#elif defined (__GNUC__)
+#pragma GCC optimize ("O3")
+#define __USED __attribute__((used))
+#elif defined (__ICCARM__)
+#define __USED __root
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      Definitions
+ *---------------------------------------------------------------------------*/
+
+#define _declare_box(pool,size,cnt)  uint32_t pool[(((size)+3)/4)*(cnt) + 3]
+#define _declare_box8(pool,size,cnt) uint64_t pool[(((size)+7)/8)*(cnt) + 2]
+
+#define OS_TCB_SIZE     48
+#define OS_TMR_SIZE     8
+
+#if defined (__CC_ARM) && !defined (__MICROLIB)
+
+typedef void    *OS_ID;
+typedef uint32_t OS_TID;
+typedef uint32_t OS_MUT[3];
+typedef uint32_t OS_RESULT;
+
+#define runtask_id()    rt_tsk_self()
+#define mutex_init(m)   rt_mut_init(m)
+#define mutex_wait(m)   os_mut_wait(m,0xFFFF)
+#define mutex_rel(m)    os_mut_release(m)
+
+extern OS_TID    rt_tsk_self    (void);
+extern void      rt_mut_init    (OS_ID mutex);
+extern OS_RESULT rt_mut_release (OS_ID mutex);
+extern OS_RESULT rt_mut_wait    (OS_ID mutex, uint16_t timeout);
+
+#define os_mut_wait(mutex,timeout) _os_mut_wait((uint32_t)rt_mut_wait,mutex,timeout)
+#define os_mut_release(mutex)      _os_mut_release((uint32_t)rt_mut_release,mutex)
+
+OS_RESULT _os_mut_release (uint32_t p, OS_ID mutex)                   __svc_indirect(0);
+OS_RESULT _os_mut_wait    (uint32_t p, OS_ID mutex, uint16_t timeout) __svc_indirect(0);
+
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+#if (OS_TIMERS != 0)
+#define OS_TASK_CNT (OS_TASKCNT + 1)
+#else
+#define OS_TASK_CNT  OS_TASKCNT
+#endif
+
+uint16_t const os_maxtaskrun = OS_TASK_CNT;
+uint32_t const os_rrobin     = (OS_ROBIN << 16) | OS_ROBINTOUT;
+uint32_t const os_trv        = OS_TRV;
+uint8_t  const os_flags      = OS_RUNPRIV;
+
+/* Export following defines to uVision debugger. */
+__USED uint32_t const os_clockrate = OS_TICK;
+__USED uint32_t const os_timernum  = 0;
+
+/* Stack for the os_idle_demon */
+unsigned int idle_task_stack[OS_IDLESTKSIZE];
+unsigned short const idle_task_stack_size = OS_IDLESTKSIZE;
+
+#ifndef OS_FIFOSZ
+ #define OS_FIFOSZ      16
+#endif
+
+/* Fifo Queue buffer for ISR requests.*/
+uint32_t       os_fifo[OS_FIFOSZ*2+1];
+uint8_t  const os_fifo_size = OS_FIFOSZ;
+
+/* An array of Active task pointers. */
+void *os_active_TCB[OS_TASK_CNT];
+
+/* User Timers Resources */
+#if (OS_TIMERS != 0)
+extern void osTimerThread (void const *argument);
+osThreadDef(osTimerThread, (osPriority)(OS_TIMERPRIO-3), 4*OS_TIMERSTKSZ);
+osThreadId osThreadId_osTimerThread;
+osMessageQDef(osTimerMessageQ, OS_TIMERCBQS, void *);
+osMessageQId osMessageQId_osTimerMessageQ;
+#else
+osThreadDef_t os_thread_def_osTimerThread = { NULL };
+osThreadId osThreadId_osTimerThread;
+osMessageQDef(osTimerMessageQ, 0, void *);
+osMessageQId osMessageQId_osTimerMessageQ;
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      RTX Optimizations (empty functions)
+ *---------------------------------------------------------------------------*/
+
+#if OS_ROBIN == 0
+ void rt_init_robin (void) {;}
+ void rt_chk_robin  (void) {;}
+#endif
+
+#if OS_STKCHECK == 0
+ void rt_stk_check  (void) {;}
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      Standard Library multithreading interface
+ *---------------------------------------------------------------------------*/
+
+#if defined (__CC_ARM) && !defined (__MICROLIB)
+ static OS_MUT   std_libmutex[OS_MUTEXCNT];
+ static uint32_t nr_mutex;
+
+ /*--------------------------- _mutex_initialize -----------------------------*/
+
+int _mutex_initialize (OS_ID *mutex) {
+  /* Allocate and initialize a system mutex. */
+
+  if (nr_mutex >= OS_MUTEXCNT) {
+    /* If you are here, you need to increase the number OS_MUTEXCNT. */
+    error("Not enough stdlib mutexes\n");
+  }
+  *mutex = &std_libmutex[nr_mutex++];
+  mutex_init (*mutex);
+  return (1);
+}
+
+
+/*--------------------------- _mutex_acquire --------------------------------*/
+
+__attribute__((used)) void _mutex_acquire (OS_ID *mutex) {
+  /* Acquire a system mutex, lock stdlib resources. */
+  if (runtask_id ()) {
+    /* RTX running, acquire a mutex. */
+    mutex_wait (*mutex);
+  }
+}
+
+
+/*--------------------------- _mutex_release --------------------------------*/
+
+__attribute__((used)) void _mutex_release (OS_ID *mutex) {
+  /* Release a system mutex, unlock stdlib resources. */
+  if (runtask_id ()) {
+    /* RTX running, release a mutex. */
+    mutex_rel (*mutex);
+  }
+}
+
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      RTX Startup
+ *---------------------------------------------------------------------------*/
+
+/* Main Thread definition */
+extern void pre_main (void);
+osThreadDef_t os_thread_def_main = {(os_pthread)pre_main, osPriorityNormal, 0, NULL};
+
+#ifndef INITIAL_SP
+ #error "no target defined"
+#endif
+
+#ifdef __CC_ARM
+extern unsigned char     Image$$RW_IRAM1$$ZI$$Limit[];
+#define HEAP_START      (Image$$RW_IRAM1$$ZI$$Limit)
+#elif defined(__GNUC__)
+extern unsigned char     __end__[];
+#define HEAP_START      (__end__)
+#elif defined(__ICCARM__)
+#pragma section="HEAP"
+#define HEAP_START     (void *)__section_begin("HEAP")
+#endif
+
+void set_main_stack(void) {
+    // That is the bottom of the main stack block: no collision detection
+    os_thread_def_main.stack_pointer = HEAP_START;
+
+    // Leave OS_SCHEDULERSTKSIZE words for the scheduler and interrupts
+    os_thread_def_main.stacksize = (INITIAL_SP - (unsigned int)HEAP_START) - (OS_SCHEDULERSTKSIZE * 4);
+}
+
+#if defined (__CC_ARM)
+#ifdef __MICROLIB
+
+int main(void);
+void _main_init (void) __attribute__((section(".ARM.Collect$$$$000000FF")));
+void $Super$$__cpp_initialize__aeabi_(void);
+
+void _main_init (void) {
+  osKernelInitialize();
+  set_main_stack();
+  osThreadCreate(&os_thread_def_main, NULL);
+  osKernelStart();
+  for (;;);
+}
+
+void $Sub$$__cpp_initialize__aeabi_(void)
+{
+  // this should invoke C++ initializers prior _main_init, we keep this empty and
+  // invoke them after _main_init (=starts RTX kernel)
+}
+
+void pre_main()
+{
+  $Super$$__cpp_initialize__aeabi_();
+  main();
+}
+
+#else
+
+void * armcc_heap_base;
+void * armcc_heap_top;
+
+__asm void pre_main (void)
+{
+  IMPORT  __rt_lib_init
+  IMPORT  main
+  IMPORT  armcc_heap_base
+  IMPORT  armcc_heap_top
+
+  LDR     R0,=armcc_heap_base
+  LDR     R1,=armcc_heap_top
+  LDR     R0,[R0]
+  LDR     R1,[R1]
+  /* Save link register (keep 8 byte alignment with dummy R4) */
+  PUSH    {R4, LR}
+  BL      __rt_lib_init
+  BL       main
+  /* Return to the thread destroy function.
+   */
+  POP     {R4, PC}
+  ALIGN
+}
+
+/* The single memory model is checking for stack collision at run time, verifing
+   that the heap pointer is underneath the stack pointer.
+
+   With the RTOS there is not only one stack above the heap, there are multiple
+   stacks and some of them are underneath the heap pointer.
+*/
+#pragma import(__use_two_region_memory)
+
+__asm void __rt_entry (void) {
+
+  IMPORT  __user_setup_stackheap
+  IMPORT  armcc_heap_base
+  IMPORT  armcc_heap_top
+  IMPORT  os_thread_def_main
+  IMPORT  osKernelInitialize
+  IMPORT  set_main_stack
+  IMPORT  osKernelStart
+  IMPORT  osThreadCreate
+
+  /* __user_setup_stackheap returns:
+   * - Heap base in r0 (if the program uses the heap).
+   * - Stack base in sp.
+   * - Heap limit in r2 (if the program uses the heap and uses two-region memory).
+   *
+   * More info can be found in:
+   * ARM Compiler ARM C and C++ Libraries and Floating-Point Support User Guide
+   */
+  BL      __user_setup_stackheap
+  LDR     R3,=armcc_heap_base
+  LDR     R4,=armcc_heap_top
+  STR     R0,[R3]
+  STR     R2,[R4]
+  BL      osKernelInitialize
+  BL      set_main_stack
+  LDR     R0,=os_thread_def_main
+  MOVS    R1,#0
+  BL      osThreadCreate
+  BL      osKernelStart
+  /* osKernelStart should not return */
+  B       .
+
+  ALIGN
+}
+
+#endif
+
+#elif defined (__GNUC__)
+
+extern int atexit(void (*func)(void));
+extern void __libc_fini_array(void);
+extern void __libc_init_array (void);
+extern int main(int argc, char **argv);
+
+void pre_main(void) {
+    atexit(__libc_fini_array);
+    __libc_init_array();
+    main(0, NULL);
+}
+
+__attribute__((naked)) void software_init_hook_rtos (void) {
+  __asm (
+    ".syntax unified\n"
+    ".thumb\n"
+    "bl   osKernelInitialize\n"
+    "bl   set_main_stack\n"
+    "ldr  r0,=os_thread_def_main\n"
+    "movs r1,#0\n"
+    "bl   osThreadCreate\n"
+    "bl   osKernelStart\n"
+    /* osKernelStart should not return */
+    "B       .\n"
+  );
+}
+
+#elif defined (__ICCARM__)
+
+extern void* __vector_table;
+extern int  __low_level_init(void);
+extern void __iar_data_init3(void);
+extern __weak void __iar_init_core( void );
+extern __weak void __iar_init_vfp( void );
+extern void __iar_dynamic_initialization(void);
+extern void mbed_sdk_init(void);
+extern void exit(int arg);
+
+static uint8_t low_level_init_needed;
+
+void pre_main(void) {
+    if (low_level_init_needed) {
+        __iar_dynamic_initialization();
+    }
+    main();
+}
+
+#pragma required=__vector_table
+void __iar_program_start( void )
+{
+  __iar_init_core();
+  __iar_init_vfp();
+
+  uint8_t low_level_init_needed_local;
+
+  low_level_init_needed_local = __low_level_init();
+  if (low_level_init_needed_local) {
+    __iar_data_init3();
+    mbed_sdk_init();
+  }
+  /* Store in a global variable after RAM has been initialized */
+  low_level_init_needed = low_level_init_needed_local;
+  osKernelInitialize();
+  set_main_stack();
+  osThreadCreate(&os_thread_def_main, NULL);
+  osKernelStart();
+  /* osKernelStart should not return */
+  while (1);
+}
+
+#endif
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/RTX_Conf.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/RTX_Conf.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,72 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RTX_CONFIG.H
+ *      Purpose: Exported functions of RTX_Config.c
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+
+/* Error Codes */
+#define OS_ERR_STK_OVF          1
+#define OS_ERR_FIFO_OVF         2
+#define OS_ERR_MBX_OVF          3
+
+/* Definitions */
+#define BOX_ALIGN_8                   0x80000000
+#define _declare_box(pool,size,cnt)   U32 pool[(((size)+3)/4)*(cnt) + 3]
+#define _declare_box8(pool,size,cnt)  U64 pool[(((size)+7)/8)*(cnt) + 2]
+#define _init_box8(pool,size,bsize)   _init_box (pool,size,(bsize) | BOX_ALIGN_8)
+
+/* Variables */
+extern U32 idle_task_stack[];
+extern U32 os_fifo[];
+extern void *os_active_TCB[];
+
+/* Constants */
+extern U16 const os_maxtaskrun;
+extern U32 const os_trv;
+extern U8  const os_flags;
+extern U32 const os_rrobin;
+extern U32 const os_clockrate;
+extern U32 const os_timernum;
+extern U16 const idle_task_stack_size;
+
+extern U8  const os_fifo_size;
+
+/* Functions */
+extern void os_idle_demon   (void);
+extern int  os_tick_init    (void);
+extern void os_tick_irqack  (void);
+extern void os_tmr_call     (U16  info);
+extern void os_error        (U32 err_code);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/RTX_Conf_CM.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/RTX_Conf_CM.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,228 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RTX_Conf_CM.C
+ *      Purpose: Configuration of CMSIS RTX Kernel for ARM7TDMI
+ *      Rev.:    V1.0
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "cmsis_os.h"
+
+
+/*----------------------------------------------------------------------------
+ *      RTX User configuration part BEGIN
+ *---------------------------------------------------------------------------*/
+
+// Include per-target RTX config file
+#include "mbed_rtx4.h"
+
+//-------- <<< Use Configuration Wizard in Context Menu >>> -----------------
+//
+// <h>Thread Configuration
+// =======================
+//
+//   <o>Number of concurrent running threads <0-250>
+//   <i> Defines max. number of threads that will run at the same time.
+//       counting "main", but not counting "osTimerThread"
+//   <i> Default: 6
+#ifndef OS_TASKCNT
+ #error "no target defined"
+#endif
+
+//   <o>Scheduler (+ interrupts) stack size [bytes] <64-4096:8><#/4>
+#ifndef OS_SCHEDULERSTKSIZE
+ #error "no target defined"
+#endif
+
+//   <o>Idle stack size [bytes] <64-4096:8><#/4>
+//   <i> Defines default stack size for the Idle thread.
+#ifndef OS_IDLESTKSIZE
+ #define OS_IDLESTKSIZE         136
+#endif
+
+//   <o>Timer Thread stack size [bytes] <64-4096:8><#/4>
+//   <i> Defines stack size for Timer thread.
+//   <i> Default: 200
+#ifndef OS_TIMERSTKSZ
+ #define OS_TIMERSTKSZ  WORDS_STACK_SIZE
+#endif
+
+// <q>Check for stack overflow
+// <i> Includes the stack checking code for stack overflow.
+// <i> Note that additional code reduces the Kernel performance.
+#ifndef OS_STKCHECK
+ #define OS_STKCHECK    1
+#endif
+
+// <o>Processor mode for thread execution
+//   <0=> Unprivileged mode
+//   <1=> Privileged mode
+// <i> Default: Privileged mode
+#ifndef OS_RUNPRIV
+ #define OS_RUNPRIV     1
+#endif
+
+// </h>
+// <h>SysTick Timer Configuration
+// ==============================
+//
+//   <o>Timer clock value [Hz] <1-1000000000>
+//   <i> Defines the timer clock value.
+//   <i> Default: 6000000  (6MHz)
+#ifndef OS_CLOCK
+ #error "no target defined"
+#endif
+
+//   <o>Timer tick value [us] <1-1000000>
+//   <i> Defines the timer tick value.
+//   <i> Default: 1000  (1ms)
+#ifndef OS_TICK
+ #define OS_TICK        1000
+#endif
+
+// </h>
+
+// <h>System Configuration
+// =======================
+//
+// <e>Round-Robin Thread switching
+// ===============================
+//
+// <i> Enables Round-Robin Thread switching.
+#ifndef OS_ROBIN
+ #define OS_ROBIN       1
+#endif
+
+//   <o>Round-Robin Timeout [ticks] <1-1000>
+//   <i> Defines how long a thread will execute before a thread switch.
+//   <i> Default: 5
+#ifndef OS_ROBINTOUT
+ #define OS_ROBINTOUT   5
+#endif
+
+// </e>
+
+// <e>User Timers
+// ==============
+//   <i> Enables user Timers
+#ifndef OS_TIMERS
+ #define OS_TIMERS      1
+#endif
+
+//   <o>Timer Thread Priority
+//                        <1=> Low
+//                        <2=> Below Normal
+//                        <3=> Normal
+//                        <4=> Above Normal
+//                        <5=> High
+//                        <6=> Realtime (highest)
+//   <i> Defines priority for Timer Thread
+//   <i> Default: High
+#ifndef OS_TIMERPRIO
+ #define OS_TIMERPRIO   5
+#endif
+
+//   <o>Timer Callback Queue size <1-32>
+//   <i> Number of concurrent active timer callback functions.
+//   <i> Default: 4
+#ifndef OS_TIMERCBQSZ
+ #define OS_TIMERCBQS   4
+#endif
+
+// </e>
+
+//   <o>ISR FIFO Queue size<4=>   4 entries  <8=>   8 entries
+//                         <12=> 12 entries  <16=> 16 entries
+//                         <24=> 24 entries  <32=> 32 entries
+//                         <48=> 48 entries  <64=> 64 entries
+//                         <96=> 96 entries
+//   <i> ISR functions store requests to this buffer,
+//   <i> when they are called from the interrupt handler.
+//   <i> Default: 16 entries
+#ifndef OS_FIFOSZ
+ #define OS_FIFOSZ      16
+#endif
+
+// </h>
+
+//------------- <<< end of configuration section >>> -----------------------
+
+// Standard library system mutexes
+// ===============================
+//  Define max. number system mutexes that are used to protect
+//  the arm standard runtime library. For microlib they are not used.
+#ifndef OS_MUTEXCNT
+ #define OS_MUTEXCNT    12
+#endif
+
+/*----------------------------------------------------------------------------
+ *      RTX User configuration part END
+ *---------------------------------------------------------------------------*/
+
+#define OS_TRV          ((uint32_t)(((double)OS_CLOCK*(double)OS_TICK)/1E6)-1)
+
+
+/*----------------------------------------------------------------------------
+ *      OS Idle daemon
+ *---------------------------------------------------------------------------*/
+extern void rtos_idle_loop(void);
+
+void os_idle_demon (void) {
+    /* The idle demon is a system thread, running when no other thread is      */
+    /* ready to run.                                                           */
+    rtos_idle_loop();
+}
+
+/*----------------------------------------------------------------------------
+ *      RTX Errors
+ *---------------------------------------------------------------------------*/
+extern void mbed_die(void);
+
+void os_error (uint32_t err_code) {
+    /* This function is called when a runtime error is detected. Parameter     */
+    /* 'err_code' holds the runtime error code (defined in RTX_Conf.h).      */
+    mbed_die();
+}
+
+void sysThreadError(osStatus status) {
+    if (status != osOK) {
+        mbed_die();
+    }
+}
+
+/*----------------------------------------------------------------------------
+ *      RTX Configuration Functions
+ *---------------------------------------------------------------------------*/
+
+#include "RTX_CM_lib.h"
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/cmsis_os.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/cmsis_os.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,774 @@
+/* ----------------------------------------------------------------------
+ * Copyright (C) 2015 ARM Limited. All rights reserved.
+ *
+ * $Date:        5. June 2012
+ * $Revision:    V1.01
+ *
+ * Project:      CMSIS-RTOS API
+ * Title:        cmsis_os.h RTX header file
+ *
+ * Version 0.02
+ *    Initial Proposal Phase
+ * Version 0.03
+ *    osKernelStart added, optional feature: main started as thread
+ *    osSemaphores have standard behavior
+ *    osTimerCreate does not start the timer, added osTimerStart
+ *    osThreadPass is renamed to osThreadYield
+ * Version 1.01
+ *    Support for C++ interface
+ *     - const attribute removed from the osXxxxDef_t typedef's
+ *     - const attribute added to the osXxxxDef macros
+ *    Added: osTimerDelete, osMutexDelete, osSemaphoreDelete
+ *    Added: osKernelInitialize
+ * -------------------------------------------------------------------- */
+
+/**
+\page cmsis_os_h Header File Template: cmsis_os.h
+
+The file \b cmsis_os.h is a template header file for a CMSIS-RTOS compliant Real-Time Operating System (RTOS).
+Each RTOS that is compliant with CMSIS-RTOS shall provide a specific \b cmsis_os.h header file that represents
+its implementation.
+
+The file cmsis_os.h contains:
+ - CMSIS-RTOS API function definitions
+ - struct definitions for parameters and return types
+ - status and priority values used by CMSIS-RTOS API functions
+ - macros for defining threads and other kernel objects
+
+
+<b>Name conventions and header file modifications</b>
+
+All definitions are prefixed with \b os to give an unique name space for CMSIS-RTOS functions.
+Definitions that are prefixed \b os_ are not used in the application code but local to this header file.
+All definitions and functions that belong to a module are grouped and have a common prefix, i.e. \b osThread.
+
+Definitions that are marked with <b>CAN BE CHANGED</b> can be adapted towards the needs of the actual CMSIS-RTOS implementation.
+These definitions can be specific to the underlying RTOS kernel.
+
+Definitions that are marked with <b>MUST REMAIN UNCHANGED</b> cannot be altered. Otherwise the CMSIS-RTOS implementation is no longer
+compliant to the standard. Note that some functions are optional and need not to be provided by every CMSIS-RTOS implementation.
+
+
+<b>Function calls from interrupt service routines</b>
+
+The following CMSIS-RTOS functions can be called from threads and interrupt service routines (ISR):
+  - \ref osSignalSet
+  - \ref osSemaphoreRelease
+  - \ref osPoolAlloc, \ref osPoolCAlloc, \ref osPoolFree
+  - \ref osMessagePut, \ref osMessageGet
+  - \ref osMailAlloc, \ref osMailCAlloc, \ref osMailGet, \ref osMailPut, \ref osMailFree
+
+Functions that cannot be called from an ISR are verifying the interrupt status and return in case that they are called
+from an ISR context the status code \b osErrorISR. In some implementations this condition might be caught using the HARD FAULT vector.
+
+Some CMSIS-RTOS implementations support CMSIS-RTOS function calls from multiple ISR at the same time.
+If this is impossible, the CMSIS-RTOS rejects calls by nested ISR functions with the status code \b osErrorISRRecursive.
+
+
+<b>Define and reference object definitions</b>
+
+With <b>\#define osObjectsExternal</b> objects are defined as external symbols. This allows to create a consistent header file
+that is used throughout a project as shown below:
+
+<i>Header File</i>
+\code
+#include <cmsis_os.h>                                         // CMSIS RTOS header file
+
+// Thread definition
+extern void thread_sample (void const *argument);             // function prototype
+osThreadDef (thread_sample, osPriorityBelowNormal, 1, 100);
+
+// Pool definition
+osPoolDef(MyPool, 10, long);
+\endcode
+
+
+This header file defines all objects when included in a C/C++ source file. When <b>\#define osObjectsExternal</b> is
+present before the header file, the objects are defined as external symbols. A single consistent header file can therefore be
+used throughout the whole project.
+
+<i>Example</i>
+\code
+#include "osObjects.h"     // Definition of the CMSIS-RTOS objects
+\endcode
+
+\code
+#define osObjectExternal   // Objects will be defined as external symbols
+#include "osObjects.h"     // Reference to the CMSIS-RTOS objects
+\endcode
+
+*/
+
+#ifndef _CMSIS_OS_H
+#define _CMSIS_OS_H
+
+/// \note MUST REMAIN UNCHANGED: \b osCMSIS identifies the CMSIS-RTOS API version.
+#define osCMSIS           0x10001      ///< API version (main [31:16] .sub [15:0])
+
+/// \note CAN BE CHANGED: \b osCMSIS_KERNEL identifies the underlying RTOS kernel and version number.
+#define osCMSIS_RTX     ((4<<16)|61)   ///< RTOS identification and version (main [31:16] .sub [15:0])
+
+/// \note MUST REMAIN UNCHANGED: \b osKernelSystemId shall be consistent in every CMSIS-RTOS.
+#define osKernelSystemId "RTX V4.61"   ///< RTOS identification string
+
+
+#define CMSIS_OS_RTX
+
+// The stack space occupied is mainly dependent on the underling C standard library
+#if defined(TOOLCHAIN_GCC) || defined(TOOLCHAIN_ARM_STD) || defined(TOOLCHAIN_IAR)
+#    define WORDS_STACK_SIZE   512
+#elif defined(TOOLCHAIN_ARM_MICRO)
+#    define WORDS_STACK_SIZE   128
+#endif
+
+#define DEFAULT_STACK_SIZE         (WORDS_STACK_SIZE*4)
+
+
+/// \note MUST REMAIN UNCHANGED: \b osFeature_xxx shall be consistent in every CMSIS-RTOS.
+#define osFeature_MainThread   1       ///< main thread      1=main can be thread, 0=not available
+#define osFeature_Pool         1       ///< Memory Pools:    1=available, 0=not available
+#define osFeature_MailQ        1       ///< Mail Queues:     1=available, 0=not available
+#define osFeature_MessageQ     1       ///< Message Queues:  1=available, 0=not available
+#define osFeature_Signals      16      ///< maximum number of Signal Flags available per thread
+#define osFeature_Semaphore    65535   ///< maximum count for \ref osSemaphoreCreate function
+#define osFeature_Wait         0       ///< osWait function: 1=available, 0=not available
+
+#if defined (__CC_ARM)
+#define os_InRegs __value_in_regs      // Compiler specific: force struct in registers
+#elif defined (__ICCARM__)
+#define os_InRegs __value_in_regs      // Compiler specific: force struct in registers
+#else
+#define os_InRegs
+#endif
+
+#include <stdint.h>
+#include <stddef.h>
+
+#ifdef  __cplusplus
+extern "C"
+{
+#endif
+
+#include "os_tcb.h"
+
+// ==== Enumeration, structures, defines ====
+
+/// Priority used for thread control.
+/// \note MUST REMAIN UNCHANGED: \b osPriority shall be consistent in every CMSIS-RTOS.
+typedef enum  {
+  osPriorityIdle          = -3,          ///< priority: idle (lowest)
+  osPriorityLow           = -2,          ///< priority: low
+  osPriorityBelowNormal   = -1,          ///< priority: below normal
+  osPriorityNormal        =  0,          ///< priority: normal (default)
+  osPriorityAboveNormal   = +1,          ///< priority: above normal
+  osPriorityHigh          = +2,          ///< priority: high
+  osPriorityRealtime      = +3,          ///< priority: realtime (highest)
+  osPriorityError         =  0x84        ///< system cannot determine priority or thread has illegal priority
+} osPriority;
+
+/// Timeout value.
+/// \note MUST REMAIN UNCHANGED: \b osWaitForever shall be consistent in every CMSIS-RTOS.
+#define osWaitForever     0xFFFFFFFF     ///< wait forever timeout value
+
+/// Status code values returned by CMSIS-RTOS functions.
+/// \note MUST REMAIN UNCHANGED: \b osStatus shall be consistent in every CMSIS-RTOS.
+typedef enum  {
+  osOK                    =     0,       ///< function completed; no error or event occurred.
+  osEventSignal           =  0x08,       ///< function completed; signal event occurred.
+  osEventMessage          =  0x10,       ///< function completed; message event occurred.
+  osEventMail             =  0x20,       ///< function completed; mail event occurred.
+  osEventTimeout          =  0x40,       ///< function completed; timeout occurred.
+  osErrorParameter        =  0x80,       ///< parameter error: a mandatory parameter was missing or specified an incorrect object.
+  osErrorResource         =  0x81,       ///< resource not available: a specified resource was not available.
+  osErrorTimeoutResource  =  0xC1,       ///< resource not available within given time: a specified resource was not available within the timeout period.
+  osErrorISR              =  0x82,       ///< not allowed in ISR context: the function cannot be called from interrupt service routines.
+  osErrorISRRecursive     =  0x83,       ///< function called multiple times from ISR with same object.
+  osErrorPriority         =  0x84,       ///< system cannot determine priority or thread has illegal priority.
+  osErrorNoMemory         =  0x85,       ///< system is out of memory: it was impossible to allocate or reserve memory for the operation.
+  osErrorValue            =  0x86,       ///< value of a parameter is out of range.
+  osErrorOS               =  0xFF,       ///< unspecified RTOS error: run-time error but no other error message fits.
+  os_status_reserved      =  0x7FFFFFFF  ///< prevent from enum down-size compiler optimization.
+} osStatus;
+
+
+/// Timer type value for the timer definition.
+/// \note MUST REMAIN UNCHANGED: \b os_timer_type shall be consistent in every CMSIS-RTOS.
+typedef enum  {
+  osTimerOnce             =     0,       ///< one-shot timer
+  osTimerPeriodic         =     1        ///< repeating timer
+} os_timer_type;
+
+/// Entry point of a thread.
+/// \note MUST REMAIN UNCHANGED: \b os_pthread shall be consistent in every CMSIS-RTOS.
+typedef void (*os_pthread) (void const *argument);
+
+/// Entry point of a timer call back function.
+/// \note MUST REMAIN UNCHANGED: \b os_ptimer shall be consistent in every CMSIS-RTOS.
+typedef void (*os_ptimer) (void const *argument);
+
+// >>> the following data type definitions may shall adapted towards a specific RTOS
+
+/// Thread ID identifies the thread (pointer to a thread control block).
+/// \note CAN BE CHANGED: \b os_thread_cb is implementation specific in every CMSIS-RTOS.
+typedef struct os_thread_cb *osThreadId;
+
+/// Timer ID identifies the timer (pointer to a timer control block).
+/// \note CAN BE CHANGED: \b os_timer_cb is implementation specific in every CMSIS-RTOS.
+typedef struct os_timer_cb *osTimerId;
+
+/// Mutex ID identifies the mutex (pointer to a mutex control block).
+/// \note CAN BE CHANGED: \b os_mutex_cb is implementation specific in every CMSIS-RTOS.
+typedef struct os_mutex_cb *osMutexId;
+
+/// Semaphore ID identifies the semaphore (pointer to a semaphore control block).
+/// \note CAN BE CHANGED: \b os_semaphore_cb is implementation specific in every CMSIS-RTOS.
+typedef struct os_semaphore_cb *osSemaphoreId;
+
+/// Pool ID identifies the memory pool (pointer to a memory pool control block).
+/// \note CAN BE CHANGED: \b os_pool_cb is implementation specific in every CMSIS-RTOS.
+typedef struct os_pool_cb *osPoolId;
+
+/// Message ID identifies the message queue (pointer to a message queue control block).
+/// \note CAN BE CHANGED: \b os_messageQ_cb is implementation specific in every CMSIS-RTOS.
+typedef struct os_messageQ_cb *osMessageQId;
+
+/// Mail ID identifies the mail queue (pointer to a mail queue control block).
+/// \note CAN BE CHANGED: \b os_mailQ_cb is implementation specific in every CMSIS-RTOS.
+typedef struct os_mailQ_cb *osMailQId;
+
+
+/// Thread Definition structure contains startup information of a thread.
+/// \note CAN BE CHANGED: \b os_thread_def is implementation specific in every CMSIS-RTOS.
+typedef struct os_thread_def  {
+  os_pthread               pthread;      ///< start address of thread function
+  osPriority             tpriority;      ///< initial thread priority
+  uint32_t               stacksize;      ///< stack size requirements in bytes
+  uint32_t              *stack_pointer;  ///< pointer to the stack memory block
+  struct OS_TCB          tcb;
+} osThreadDef_t;
+
+/// Timer Definition structure contains timer parameters.
+/// \note CAN BE CHANGED: \b os_timer_def is implementation specific in every CMSIS-RTOS.
+typedef struct os_timer_def  {
+  os_ptimer                 ptimer;    ///< start address of a timer function
+  void                      *timer;    ///< pointer to internal data
+} osTimerDef_t;
+
+/// Mutex Definition structure contains setup information for a mutex.
+/// \note CAN BE CHANGED: \b os_mutex_def is implementation specific in every CMSIS-RTOS.
+typedef struct os_mutex_def  {
+  void                      *mutex;    ///< pointer to internal data
+} osMutexDef_t;
+
+/// Semaphore Definition structure contains setup information for a semaphore.
+/// \note CAN BE CHANGED: \b os_semaphore_def is implementation specific in every CMSIS-RTOS.
+typedef struct os_semaphore_def  {
+  void                  *semaphore;    ///< pointer to internal data
+} osSemaphoreDef_t;
+
+/// Definition structure for memory block allocation.
+/// \note CAN BE CHANGED: \b os_pool_def is implementation specific in every CMSIS-RTOS.
+typedef struct os_pool_def  {
+  uint32_t                 pool_sz;    ///< number of items (elements) in the pool
+  uint32_t                 item_sz;    ///< size of an item
+  void                       *pool;    ///< pointer to memory for pool
+} osPoolDef_t;
+
+/// Definition structure for message queue.
+/// \note CAN BE CHANGED: \b os_messageQ_def is implementation specific in every CMSIS-RTOS.
+typedef struct os_messageQ_def  {
+  uint32_t                queue_sz;    ///< number of elements in the queue
+  void                       *pool;    ///< memory array for messages
+} osMessageQDef_t;
+
+/// Definition structure for mail queue.
+/// \note CAN BE CHANGED: \b os_mailQ_def is implementation specific in every CMSIS-RTOS.
+typedef struct os_mailQ_def  {
+  uint32_t                queue_sz;    ///< number of elements in the queue
+  uint32_t                 item_sz;    ///< size of an item
+  void                       *pool;    ///< memory array for mail
+} osMailQDef_t;
+
+/// Event structure contains detailed information about an event.
+/// \note MUST REMAIN UNCHANGED: \b os_event shall be consistent in every CMSIS-RTOS.
+///       However the struct may be extended at the end.
+typedef struct  {
+  osStatus                 status;     ///< status code: event or error information
+  union  {
+    uint32_t                    v;     ///< message as 32-bit value
+    void                       *p;     ///< message or mail as void pointer
+    int32_t               signals;     ///< signal flags
+  } value;                             ///< event value
+  union  {
+    osMailQId             mail_id;     ///< mail id obtained by \ref osMailCreate
+    osMessageQId       message_id;     ///< message id obtained by \ref osMessageCreate
+  } def;                               ///< event definition
+} osEvent;
+
+
+//  ==== Kernel Control Functions ====
+
+/// Initialize the RTOS Kernel for creating objects.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osKernelInitialize shall be consistent in every CMSIS-RTOS.
+osStatus osKernelInitialize (void);
+
+/// Start the RTOS Kernel.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osKernelStart shall be consistent in every CMSIS-RTOS.
+osStatus osKernelStart (void);
+
+/// Check if the RTOS kernel is already started.
+/// \note MUST REMAIN UNCHANGED: \b osKernelRunning shall be consistent in every CMSIS-RTOS.
+/// \return 0 RTOS is not started, 1 RTOS is started.
+int32_t osKernelRunning(void);
+
+
+//  ==== Thread Management ====
+
+/// Create a Thread Definition with function, priority, and stack requirements.
+/// \param         name         name of the thread function.
+/// \param         priority     initial priority of the thread function.
+/// \param         stacksz      stack size (in bytes) requirements for the thread function.
+/// \note CAN BE CHANGED: The parameters to \b osThreadDef shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osThreadDef(name, priority, stacksz)  \
+extern osThreadDef_t os_thread_def_##name
+#else                            // define the object
+#define osThreadDef(name, priority, stacksz)  \
+uint32_t os_thread_def_stack_##name [stacksz / sizeof(uint32_t)]; \
+osThreadDef_t os_thread_def_##name = \
+{ (name), (priority), (stacksz), (os_thread_def_stack_##name)}
+#endif
+
+/// Access a Thread definition.
+/// \param         name          name of the thread definition object.
+/// \note CAN BE CHANGED: The parameter to \b osThread shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osThread(name)  \
+&os_thread_def_##name
+
+/// Create a thread and add it to Active Threads and set it to state READY.
+/// \param[in]     thread_def    thread definition referenced with \ref osThread.
+/// \param[in]     argument      pointer that is passed to the thread function as start argument.
+/// \return thread ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osThreadCreate shall be consistent in every CMSIS-RTOS.
+osThreadId osThreadCreate (osThreadDef_t *thread_def, void *argument);
+
+/// Return the thread ID of the current running thread.
+/// \return thread ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osThreadGetId shall be consistent in every CMSIS-RTOS.
+osThreadId osThreadGetId (void);
+
+/// Terminate execution of a thread and remove it from Active Threads.
+/// \param[in]     thread_id   thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osThreadTerminate shall be consistent in every CMSIS-RTOS.
+osStatus osThreadTerminate (osThreadId thread_id);
+
+/// Pass control to next thread that is in state \b READY.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osThreadYield shall be consistent in every CMSIS-RTOS.
+osStatus osThreadYield (void);
+
+/// Change priority of an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \param[in]     priority      new priority value for the thread function.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osThreadSetPriority shall be consistent in every CMSIS-RTOS.
+osStatus osThreadSetPriority (osThreadId thread_id, osPriority priority);
+
+/// Get current priority of an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \return current priority value of the thread function.
+/// \note MUST REMAIN UNCHANGED: \b osThreadGetPriority shall be consistent in every CMSIS-RTOS.
+osPriority osThreadGetPriority (osThreadId thread_id);
+
+
+//  ==== Generic Wait Functions ====
+
+/// Wait for Timeout (Time Delay).
+/// \param[in]     millisec      time delay value
+/// \return status code that indicates the execution status of the function.
+osStatus osDelay (uint32_t millisec);
+
+#if (defined (osFeature_Wait)  &&  (osFeature_Wait != 0))     // Generic Wait available
+
+/// Wait for Signal, Message, Mail, or Timeout.
+/// \param[in] millisec          timeout value or 0 in case of no time-out
+/// \return event that contains signal, message, or mail information or error code.
+/// \note MUST REMAIN UNCHANGED: \b osWait shall be consistent in every CMSIS-RTOS.
+os_InRegs osEvent osWait (uint32_t millisec);
+
+#endif  // Generic Wait available
+
+
+//  ==== Timer Management Functions ====
+/// Define a Timer object.
+/// \param         name          name of the timer object.
+/// \param         function      name of the timer call back function.
+/// \note CAN BE CHANGED: The parameter to \b osTimerDef shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osTimerDef(name, function)  \
+extern osTimerDef_t os_timer_def_##name
+#else                            // define the object
+#define osTimerDef(name, function)  \
+uint32_t os_timer_cb_##name[5]; \
+osTimerDef_t os_timer_def_##name = \
+{ (function), (os_timer_cb_##name) }
+#endif
+
+/// Access a Timer definition.
+/// \param         name          name of the timer object.
+/// \note CAN BE CHANGED: The parameter to \b osTimer shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osTimer(name) \
+&os_timer_def_##name
+
+/// Create a timer.
+/// \param[in]     timer_def     timer object referenced with \ref osTimer.
+/// \param[in]     type          osTimerOnce for one-shot or osTimerPeriodic for periodic behavior.
+/// \param[in]     argument      argument to the timer call back function.
+/// \return timer ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osTimerCreate shall be consistent in every CMSIS-RTOS.
+osTimerId osTimerCreate (osTimerDef_t *timer_def, os_timer_type type, void *argument);
+
+/// Start or restart a timer.
+/// \param[in]     timer_id      timer ID obtained by \ref osTimerCreate.
+/// \param[in]     millisec      time delay value of the timer.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osTimerStart shall be consistent in every CMSIS-RTOS.
+osStatus osTimerStart (osTimerId timer_id, uint32_t millisec);
+
+/// Stop the timer.
+/// \param[in]     timer_id      timer ID obtained by \ref osTimerCreate.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osTimerStop shall be consistent in every CMSIS-RTOS.
+osStatus osTimerStop (osTimerId timer_id);
+
+/// Delete a timer that was created by \ref osTimerCreate.
+/// \param[in]     timer_id      timer ID obtained by \ref osTimerCreate.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osTimerDelete shall be consistent in every CMSIS-RTOS.
+osStatus osTimerDelete (osTimerId timer_id);
+
+
+//  ==== Signal Management ====
+
+/// Set the specified Signal Flags of an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \param[in]     signals       specifies the signal flags of the thread that should be set.
+/// \return previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters.
+/// \note MUST REMAIN UNCHANGED: \b osSignalSet shall be consistent in every CMSIS-RTOS.
+int32_t osSignalSet (osThreadId thread_id, int32_t signals);
+
+/// Clear the specified Signal Flags of an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \param[in]     signals       specifies the signal flags of the thread that shall be cleared.
+/// \return previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters.
+/// \note MUST REMAIN UNCHANGED: \b osSignalClear shall be consistent in every CMSIS-RTOS.
+int32_t osSignalClear (osThreadId thread_id, int32_t signals);
+
+/// Get Signal Flags status of an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \return previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters.
+/// \note MUST REMAIN UNCHANGED: \b osSignalGet shall be consistent in every CMSIS-RTOS.
+int32_t osSignalGet (osThreadId thread_id);
+
+/// Wait for one or more Signal Flags to become signaled for the current \b RUNNING thread.
+/// \param[in]     signals       wait until all specified signal flags set or 0 for any single signal flag.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out.
+/// \return event flag information or error code.
+/// \note MUST REMAIN UNCHANGED: \b osSignalWait shall be consistent in every CMSIS-RTOS.
+os_InRegs osEvent osSignalWait (int32_t signals, uint32_t millisec);
+
+
+//  ==== Mutex Management ====
+
+/// Define a Mutex.
+/// \param         name          name of the mutex object.
+/// \note CAN BE CHANGED: The parameter to \b osMutexDef shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osMutexDef(name)  \
+extern osMutexDef_t os_mutex_def_##name
+#else                            // define the object
+#define osMutexDef(name)  \
+uint32_t os_mutex_cb_##name[3]; \
+osMutexDef_t os_mutex_def_##name = { (os_mutex_cb_##name) }
+#endif
+
+/// Access a Mutex definition.
+/// \param         name          name of the mutex object.
+/// \note CAN BE CHANGED: The parameter to \b osMutex shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osMutex(name)  \
+&os_mutex_def_##name
+
+/// Create and Initialize a Mutex object.
+/// \param[in]     mutex_def     mutex definition referenced with \ref osMutex.
+/// \return mutex ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osMutexCreate shall be consistent in every CMSIS-RTOS.
+osMutexId osMutexCreate (osMutexDef_t *mutex_def);
+
+/// Wait until a Mutex becomes available.
+/// \param[in]     mutex_id      mutex ID obtained by \ref osMutexCreate.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osMutexWait shall be consistent in every CMSIS-RTOS.
+osStatus osMutexWait (osMutexId mutex_id, uint32_t millisec);
+
+/// Release a Mutex that was obtained by \ref osMutexWait.
+/// \param[in]     mutex_id      mutex ID obtained by \ref osMutexCreate.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osMutexRelease shall be consistent in every CMSIS-RTOS.
+osStatus osMutexRelease (osMutexId mutex_id);
+
+/// Delete a Mutex that was created by \ref osMutexCreate.
+/// \param[in]     mutex_id      mutex ID obtained by \ref osMutexCreate.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osMutexDelete shall be consistent in every CMSIS-RTOS.
+osStatus osMutexDelete (osMutexId mutex_id);
+
+
+//  ==== Semaphore Management Functions ====
+
+#if (defined (osFeature_Semaphore)  &&  (osFeature_Semaphore != 0))     // Semaphore available
+
+/// Define a Semaphore object.
+/// \param         name          name of the semaphore object.
+/// \note CAN BE CHANGED: The parameter to \b osSemaphoreDef shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osSemaphoreDef(name)  \
+extern osSemaphoreDef_t os_semaphore_def_##name
+#else                            // define the object
+#define osSemaphoreDef(name)  \
+uint32_t os_semaphore_cb_##name[2]; \
+osSemaphoreDef_t os_semaphore_def_##name = { (os_semaphore_cb_##name) }
+#endif
+
+/// Access a Semaphore definition.
+/// \param         name          name of the semaphore object.
+/// \note CAN BE CHANGED: The parameter to \b osSemaphore shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osSemaphore(name)  \
+&os_semaphore_def_##name
+
+/// Create and Initialize a Semaphore object used for managing resources.
+/// \param[in]     semaphore_def semaphore definition referenced with \ref osSemaphore.
+/// \param[in]     count         number of available resources.
+/// \return semaphore ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osSemaphoreCreate shall be consistent in every CMSIS-RTOS.
+osSemaphoreId osSemaphoreCreate (osSemaphoreDef_t *semaphore_def, int32_t count);
+
+/// Wait until a Semaphore token becomes available.
+/// \param[in]     semaphore_id  semaphore object referenced with \ref osSemaphoreCreate.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out.
+/// \return number of available tokens, or -1 in case of incorrect parameters.
+/// \note MUST REMAIN UNCHANGED: \b osSemaphoreWait shall be consistent in every CMSIS-RTOS.
+int32_t osSemaphoreWait (osSemaphoreId semaphore_id, uint32_t millisec);
+
+/// Release a Semaphore token.
+/// \param[in]     semaphore_id  semaphore object referenced with \ref osSemaphoreCreate.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osSemaphoreRelease shall be consistent in every CMSIS-RTOS.
+osStatus osSemaphoreRelease (osSemaphoreId semaphore_id);
+
+/// Delete a Semaphore that was created by \ref osSemaphoreCreate.
+/// \param[in]     semaphore_id  semaphore object referenced with \ref osSemaphoreCreate.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osSemaphoreDelete shall be consistent in every CMSIS-RTOS.
+osStatus osSemaphoreDelete (osSemaphoreId semaphore_id);
+
+#endif     // Semaphore available
+
+
+//  ==== Memory Pool Management Functions ====
+
+#if (defined (osFeature_Pool)  &&  (osFeature_Pool != 0))  // Memory Pool Management available
+
+/// \brief Define a Memory Pool.
+/// \param         name          name of the memory pool.
+/// \param         no            maximum number of blocks (objects) in the memory pool.
+/// \param         type          data type of a single block (object).
+/// \note CAN BE CHANGED: The parameter to \b osPoolDef shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osPoolDef(name, no, type)   \
+extern osPoolDef_t os_pool_def_##name
+#else                            // define the object
+#define osPoolDef(name, no, type)   \
+uint32_t os_pool_m_##name[3+((sizeof(type)+3)/4)*(no)]; \
+osPoolDef_t os_pool_def_##name = \
+{ (no), sizeof(type), (os_pool_m_##name) }
+#endif
+
+/// \brief Access a Memory Pool definition.
+/// \param         name          name of the memory pool
+/// \note CAN BE CHANGED: The parameter to \b osPool shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osPool(name) \
+&os_pool_def_##name
+
+/// Create and Initialize a memory pool.
+/// \param[in]     pool_def      memory pool definition referenced with \ref osPool.
+/// \return memory pool ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osPoolCreate shall be consistent in every CMSIS-RTOS.
+osPoolId osPoolCreate (osPoolDef_t *pool_def);
+
+/// Allocate a memory block from a memory pool.
+/// \param[in]     pool_id       memory pool ID obtain referenced with \ref osPoolCreate.
+/// \return address of the allocated memory block or NULL in case of no memory available.
+/// \note MUST REMAIN UNCHANGED: \b osPoolAlloc shall be consistent in every CMSIS-RTOS.
+void *osPoolAlloc (osPoolId pool_id);
+
+/// Allocate a memory block from a memory pool and set memory block to zero.
+/// \param[in]     pool_id       memory pool ID obtain referenced with \ref osPoolCreate.
+/// \return address of the allocated memory block or NULL in case of no memory available.
+/// \note MUST REMAIN UNCHANGED: \b osPoolCAlloc shall be consistent in every CMSIS-RTOS.
+void *osPoolCAlloc (osPoolId pool_id);
+
+/// Return an allocated memory block back to a specific memory pool.
+/// \param[in]     pool_id       memory pool ID obtain referenced with \ref osPoolCreate.
+/// \param[in]     block         address of the allocated memory block that is returned to the memory pool.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osPoolFree shall be consistent in every CMSIS-RTOS.
+osStatus osPoolFree (osPoolId pool_id, void *block);
+
+#endif   // Memory Pool Management available
+
+
+//  ==== Message Queue Management Functions ====
+
+#if (defined (osFeature_MessageQ)  &&  (osFeature_MessageQ != 0))     // Message Queues available
+
+/// \brief Create a Message Queue Definition.
+/// \param         name          name of the queue.
+/// \param         queue_sz      maximum number of messages in the queue.
+/// \param         type          data type of a single message element (for debugger).
+/// \note CAN BE CHANGED: The parameter to \b osMessageQDef shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osMessageQDef(name, queue_sz, type)   \
+extern osMessageQDef_t os_messageQ_def_##name
+#else                            // define the object
+#define osMessageQDef(name, queue_sz, type)   \
+uint32_t os_messageQ_q_##name[4+(queue_sz)]; \
+osMessageQDef_t os_messageQ_def_##name = \
+{ (queue_sz), (os_messageQ_q_##name) }
+#endif
+
+/// \brief Access a Message Queue Definition.
+/// \param         name          name of the queue
+/// \note CAN BE CHANGED: The parameter to \b osMessageQ shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osMessageQ(name) \
+&os_messageQ_def_##name
+
+/// Create and Initialize a Message Queue.
+/// \param[in]     queue_def     queue definition referenced with \ref osMessageQ.
+/// \param[in]     thread_id     thread ID (obtained by \ref osThreadCreate or \ref osThreadGetId) or NULL.
+/// \return message queue ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osMessageCreate shall be consistent in every CMSIS-RTOS.
+osMessageQId osMessageCreate (osMessageQDef_t *queue_def, osThreadId thread_id);
+
+/// Put a Message to a Queue.
+/// \param[in]     queue_id      message queue ID obtained with \ref osMessageCreate.
+/// \param[in]     info          message information.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osMessagePut shall be consistent in every CMSIS-RTOS.
+osStatus osMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec);
+
+/// Get a Message or Wait for a Message from a Queue.
+/// \param[in]     queue_id      message queue ID obtained with \ref osMessageCreate.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out.
+/// \return event information that includes status code.
+/// \note MUST REMAIN UNCHANGED: \b osMessageGet shall be consistent in every CMSIS-RTOS.
+os_InRegs osEvent osMessageGet (osMessageQId queue_id, uint32_t millisec);
+
+#endif     // Message Queues available
+
+
+//  ==== Mail Queue Management Functions ====
+
+#if (defined (osFeature_MailQ)  &&  (osFeature_MailQ != 0))     // Mail Queues available
+
+/// \brief Create a Mail Queue Definition.
+/// \param         name          name of the queue
+/// \param         queue_sz      maximum number of messages in queue
+/// \param         type          data type of a single message element
+/// \note CAN BE CHANGED: The parameter to \b osMailQDef shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osMailQDef(name, queue_sz, type) \
+extern osMailQDef_t os_mailQ_def_##name
+#else                            // define the object
+#define osMailQDef(name, queue_sz, type) \
+uint32_t os_mailQ_q_##name[4+(queue_sz)]; \
+uint32_t os_mailQ_m_##name[3+((sizeof(type)+3)/4)*(queue_sz)]; \
+void *   os_mailQ_p_##name[2] = { (os_mailQ_q_##name), os_mailQ_m_##name }; \
+osMailQDef_t os_mailQ_def_##name =  \
+{ (queue_sz), sizeof(type), (os_mailQ_p_##name) }
+#endif
+
+/// \brief Access a Mail Queue Definition.
+/// \param         name          name of the queue
+/// \note CAN BE CHANGED: The parameter to \b osMailQ shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osMailQ(name)  \
+&os_mailQ_def_##name
+
+/// Create and Initialize mail queue.
+/// \param[in]     queue_def     reference to the mail queue definition obtain with \ref osMailQ
+/// \param[in]     thread_id     thread ID (obtained by \ref osThreadCreate or \ref osThreadGetId) or NULL.
+/// \return mail queue ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osMailCreate shall be consistent in every CMSIS-RTOS.
+osMailQId osMailCreate (osMailQDef_t *queue_def, osThreadId thread_id);
+
+/// Allocate a memory block from a mail.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out
+/// \return pointer to memory block that can be filled with mail or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osMailAlloc shall be consistent in every CMSIS-RTOS.
+void *osMailAlloc (osMailQId queue_id, uint32_t millisec);
+
+/// Allocate a memory block from a mail and set memory block to zero.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out
+/// \return pointer to memory block that can be filled with mail or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osMailCAlloc shall be consistent in every CMSIS-RTOS.
+void *osMailCAlloc (osMailQId queue_id, uint32_t millisec);
+
+/// Put a mail to a queue.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     mail          memory block previously allocated with \ref osMailAlloc or \ref osMailCAlloc.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osMailPut shall be consistent in every CMSIS-RTOS.
+osStatus osMailPut (osMailQId queue_id, void *mail);
+
+/// Get a mail from a queue.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out
+/// \return event that contains mail information or error code.
+/// \note MUST REMAIN UNCHANGED: \b osMailGet shall be consistent in every CMSIS-RTOS.
+os_InRegs osEvent osMailGet (osMailQId queue_id, uint32_t millisec);
+
+/// Free a memory block from a mail.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     mail          pointer to the memory block that was obtained with \ref osMailGet.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osMailFree shall be consistent in every CMSIS-RTOS.
+osStatus osMailFree (osMailQId queue_id, void *mail);
+
+#endif  // Mail Queues available
+
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif  // _CMSIS_OS_H
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/os_tcb.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/os_tcb.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,55 @@
+#ifndef OS_TCB_H
+#define OS_TCB_H
+
+/* Types */
+typedef char               S8;
+typedef unsigned char      U8;
+typedef short              S16;
+typedef unsigned short     U16;
+typedef int                S32;
+typedef unsigned int       U32;
+typedef long long          S64;
+typedef unsigned long long U64;
+typedef unsigned char      BIT;
+typedef unsigned int       BOOL;
+typedef void               (*FUNCP)(void);
+#define TCB_STACK_LR_OFFSET_BYTES   (14*4) // prelast DWORD
+#define TCB_STACK_LR_OFFSET_DWORDS  (14)   // prelast DWORD
+#define TCB_STACK_R0_OFFSET_BYTES   (1*4)  // second DWORD
+#define TCB_STACK_R0_OFFSET_DWORDS  (1)    // second DWORD
+
+typedef struct OS_TCB {
+  /* General part: identical for all implementations.                        */
+  U8     cb_type;                 /* Control Block Type                      */
+  U8     state;                   /* Task state                              */
+  U8     prio;                    /* Execution priority                      */
+  U8     task_id;                 /* Task ID value for optimized TCB access  */
+  struct OS_TCB *p_lnk;           /* Link pointer for ready/sem. wait list   */
+  struct OS_TCB *p_rlnk;          /* Link pointer for sem./mbx lst backwards */
+  struct OS_TCB *p_dlnk;          /* Link pointer for delay list             */
+  struct OS_TCB *p_blnk;          /* Link pointer for delay list backwards   */
+  U16    delta_time;              /* Time until time out                     */
+  U16    interval_time;           /* Time interval for periodic waits        */
+  U16    events;                  /* Event flags                             */
+  U16    waits;                   /* Wait flags                              */
+  void   **msg;                   /* Direct message passing when task waits  */
+
+  /* Hardware dependant part: specific for CM processor                      */
+  U8     stack_frame;             /* Stack frame: 0=Basic, 1=Extended        */
+  U8     reserved1;
+  U16    reserved2;
+  U32    priv_stack;              /* Private stack size in bytes             */
+  U32    tsk_stack;               /* Current task Stack pointer (R13)        */
+  U32    *stack;                  /* Pointer to Task Stack memory block      */
+
+  /* Library dependant part                                                   */
+#if defined (__CC_ARM) && !defined (__MICROLIB)
+ /* A memory space for arm standard library. */
+  U32 std_libspace[96/4];
+#endif
+
+  /* Task entry point used for uVision debugger                              */
+  FUNCP  ptask;                   /* Task entry address                      */
+} *P_TCB;
+
+#endif
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_CMSIS.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_CMSIS.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,1853 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    rt_CMSIS.c
+ *      Purpose: CMSIS RTOS API
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#define __CMSIS_GENERIC
+
+#include "core_arm7.h"
+
+#include "rt_TypeDef.h"
+#include "RTX_Conf.h"
+#include "rt_System.h"
+#include "rt_Task.h"
+#include "rt_Event.h"
+#include "rt_List.h"
+#include "rt_Time.h"
+#include "rt_Mutex.h"
+#include "rt_Semaphore.h"
+#include "rt_Mailbox.h"
+#include "rt_MemBox.h"
+#include "rt_HAL_CM.h"
+
+#define os_thread_cb OS_TCB
+
+#include "cmsis_os.h"
+
+#if (osFeature_Signals != 16)
+#error Invalid "osFeature_Signals" value!
+#endif
+#if (osFeature_Semaphore > 65535)
+#error Invalid "osFeature_Semaphore" value!
+#endif
+#if (osFeature_Wait != 0)
+#error osWait not supported!
+#endif
+
+
+// ==== Enumeration, structures, defines ====
+
+// Service Calls defines
+
+#if defined (__CC_ARM)          /* ARM Compiler */
+
+#define __NO_RETURN __declspec(noreturn)
+
+#define osEvent_type       osEvent
+#define osEvent_ret_status ret
+#define osEvent_ret_value  ret
+#define osEvent_ret_msg    ret
+#define osEvent_ret_mail   ret
+
+#define osCallback_type    osCallback
+#define osCallback_ret     ret
+
+#define SVC_0_1(f,t,...)                                                       \
+__svc_indirect(0) t  _##f (t(*)());                                            \
+                  t     f (void);                                              \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (void) {                                             \
+  return _##f(f);                                                              \
+}
+
+#define SVC_1_1(f,t,t1,...)                                                    \
+__svc_indirect(0) t  _##f (t(*)(t1),t1);                                       \
+                  t     f (t1 a1);                                             \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (t1 a1) {                                            \
+  return _##f(f,a1);                                                           \
+}
+
+#define SVC_2_1(f,t,t1,t2,...)                                                 \
+__svc_indirect(0) t  _##f (t(*)(t1,t2),t1,t2);                                 \
+                  t     f (t1 a1, t2 a2);                                      \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (t1 a1, t2 a2) {                                     \
+  return _##f(f,a1,a2);                                                        \
+}
+
+#define SVC_3_1(f,t,t1,t2,t3,...)                                              \
+__svc_indirect(0) t  _##f (t(*)(t1,t2,t3),t1,t2,t3);                           \
+                  t     f (t1 a1, t2 a2, t3 a3);                               \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (t1 a1, t2 a2, t3 a3) {                              \
+  return _##f(f,a1,a2,a3);                                                     \
+}
+
+#define SVC_4_1(f,t,t1,t2,t3,t4,...)                                           \
+__svc_indirect(0) t  _##f (t(*)(t1,t2,t3,t4),t1,t2,t3,t4);                     \
+                  t     f (t1 a1, t2 a2, t3 a3, t4 a4);                        \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (t1 a1, t2 a2, t3 a3, t4 a4) {                       \
+  return _##f(f,a1,a2,a3,a4);                                                  \
+}
+
+#define SVC_1_2 SVC_1_1
+#define SVC_1_3 SVC_1_1
+#define SVC_2_3 SVC_2_1
+
+#elif defined (__GNUC__)        /* GNU Compiler */
+
+#define __NO_RETURN __attribute__((noreturn))
+
+typedef uint32_t __attribute__((vector_size(8)))  ret64;
+typedef uint32_t __attribute__((vector_size(16))) ret128;
+
+#define RET_pointer    __r0
+#define RET_int32_t    __r0
+#define RET_osStatus   __r0
+#define RET_osPriority __r0
+#define RET_osEvent    {(osStatus)__r0, {(uint32_t)__r1}, {(void *)__r2}}
+#define RET_osCallback {(void *)__r0, (void *)__r1}
+
+#define osEvent_type        ret128
+#define osEvent_ret_status (ret128){ret.status}
+#define osEvent_ret_value  (ret128){ret.status, ret.value.v}
+#define osEvent_ret_msg    (ret128){ret.status, ret.value.v, (uint32_t)ret.def.message_id}
+#define osEvent_ret_mail   (ret128){ret.status, ret.value.v, (uint32_t)ret.def.mail_id}
+
+#define osCallback_type     ret64
+#define osCallback_ret     (ret64) {(uint32_t)ret.fp, (uint32_t)ret.arg}
+
+#define SVC_ArgN(n) \
+  register int __r##n __asm("r"#n);
+
+#define SVC_ArgR(n,t,a) \
+  register t   __r##n __asm("r"#n) = a;
+
+#define SVC_Arg0()                                                             \
+  SVC_ArgN(0)                                                                  \
+  SVC_ArgN(1)                                                                  \
+  SVC_ArgN(2)                                                                  \
+  SVC_ArgN(3)
+
+#define SVC_Arg1(t1)                                                           \
+  SVC_ArgR(0,t1,a1)                                                            \
+  SVC_ArgN(1)                                                                  \
+  SVC_ArgN(2)                                                                  \
+  SVC_ArgN(3)
+
+#define SVC_Arg2(t1,t2)                                                        \
+  SVC_ArgR(0,t1,a1)                                                            \
+  SVC_ArgR(1,t2,a2)                                                            \
+  SVC_ArgN(2)                                                                  \
+  SVC_ArgN(3)
+
+#define SVC_Arg3(t1,t2,t3)                                                     \
+  SVC_ArgR(0,t1,a1)                                                            \
+  SVC_ArgR(1,t2,a2)                                                            \
+  SVC_ArgR(2,t3,a3)                                                            \
+  SVC_ArgN(3)
+
+#define SVC_Arg4(t1,t2,t3,t4)                                                  \
+  SVC_ArgR(0,t1,a1)                                                            \
+  SVC_ArgR(1,t2,a2)                                                            \
+  SVC_ArgR(2,t3,a3)                                                            \
+  SVC_ArgR(3,t4,a4)
+
+#if (defined (__CORTEX_M0)) || defined (__CORTEX_M0PLUS)
+#define SVC_Call(f)                                                            \
+  __asm volatile                                                                 \
+  (                                                                            \
+    "ldr r7,="#f"\n\t"                                                         \
+    "mov r12,r7\n\t"                                                           \
+    "svc 0"                                                                    \
+    :               "=r" (__r0), "=r" (__r1), "=r" (__r2), "=r" (__r3)         \
+    :                "r" (__r0),  "r" (__r1),  "r" (__r2),  "r" (__r3)         \
+    : "r7", "r12", "lr", "cc"                                                  \
+  );
+#else
+#define SVC_Call(f)                                                            \
+  __asm volatile                                                                 \
+  (                                                                            \
+    "ldr r12,="#f"\n\t"                                                        \
+    "svc 0"                                                                    \
+    :               "=r" (__r0), "=r" (__r1), "=r" (__r2), "=r" (__r3)         \
+    :                "r" (__r0),  "r" (__r1),  "r" (__r2),  "r" (__r3)         \
+    : "r12", "lr", "cc"                                                        \
+  );
+#endif
+
+#define SVC_0_1(f,t,rv)                                                        \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (void) {                                                \
+  SVC_Arg0();                                                                  \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_1_1(f,t,t1,rv)                                                     \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (t1 a1) {                                               \
+  SVC_Arg1(t1);                                                                \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_2_1(f,t,t1,t2,rv)                                                  \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (t1 a1, t2 a2) {                                        \
+  SVC_Arg2(t1,t2);                                                             \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_3_1(f,t,t1,t2,t3,rv)                                               \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (t1 a1, t2 a2, t3 a3) {                                 \
+  SVC_Arg3(t1,t2,t3);                                                          \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_4_1(f,t,t1,t2,t3,t4,rv)                                            \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (t1 a1, t2 a2, t3 a3, t4 a4) {                          \
+  SVC_Arg4(t1,t2,t3,t4);                                                       \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_1_2 SVC_1_1
+#define SVC_1_3 SVC_1_1
+#define SVC_2_3 SVC_2_1
+
+#elif defined (__ICCARM__)      /* IAR Compiler */
+
+#define __NO_RETURN __noreturn
+
+#define osEvent_type       osEvent
+#define osEvent_ret_status ret
+#define osEvent_ret_value  ret
+#define osEvent_ret_msg    ret
+#define osEvent_ret_mail   ret
+
+#define osCallback_type    osCallback
+#define osCallback_ret     ret
+
+#define RET_osEvent     osEvent
+#define RET_osCallback  osCallback
+
+#define SVC_Setup(f)                                                           \
+  __asm(                                                                       \
+    "mov r12,%0\n"                                                             \
+    :: "r"(&f): "r12"                                                          \
+  );
+
+
+#define SVC_0_1(f,t,...)                                                       \
+t f (void);                                                                    \
+_Pragma("swi_number=0") __swi t _##f (void);                                   \
+static inline t __##f (void) {                                                 \
+  SVC_Setup(f);                                                                \
+  return _##f();                                                               \
+}
+
+#define SVC_1_1(f,t,t1,...)                                                    \
+t f (t1 a1);                                                                   \
+_Pragma("swi_number=0") __swi t _##f (t1 a1);                                  \
+static inline t __##f (t1 a1) {                                                \
+  SVC_Setup(f);                                                                \
+  return _##f(a1);                                                             \
+}
+
+#define SVC_2_1(f,t,t1,t2,...)                                                 \
+t f (t1 a1, t2 a2);                                                            \
+_Pragma("swi_number=0") __swi t _##f (t1 a1, t2 a2);                           \
+static inline t __##f (t1 a1, t2 a2) {                                         \
+  SVC_Setup(f);                                                                \
+  return _##f(a1,a2);                                                          \
+}
+
+#define SVC_3_1(f,t,t1,t2,t3,...)                                              \
+t f (t1 a1, t2 a2, t3 a3);                                                     \
+_Pragma("swi_number=0") __swi t _##f (t1 a1, t2 a2, t3 a3);                    \
+static inline t __##f (t1 a1, t2 a2, t3 a3) {                                  \
+  SVC_Setup(f);                                                                \
+  return _##f(a1,a2,a3);                                                       \
+}
+
+#define SVC_4_1(f,t,t1,t2,t3,t4,...)                                           \
+t f (t1 a1, t2 a2, t3 a3, t4 a4);                                              \
+_Pragma("swi_number=0") __swi t _##f (t1 a1, t2 a2, t3 a3, t4 a4);             \
+static inline t __##f (t1 a1, t2 a2, t3 a3, t4 a4) {                           \
+  SVC_Setup(f);                                                                \
+  return _##f(a1,a2,a3,a4);                                                    \
+}
+
+#define SVC_1_2 SVC_1_1
+#define SVC_1_3 SVC_1_1
+#define SVC_2_3 SVC_2_1
+
+#endif
+
+
+// Callback structure
+typedef struct {
+  void *fp;             // Function pointer
+  void *arg;            // Function argument
+} osCallback;
+
+
+// OS Section definitions
+#ifdef OS_SECTIONS_LINK_INFO
+extern const uint32_t  os_section_id$$Base;
+extern const uint32_t  os_section_id$$Limit;
+#endif
+
+// OS Timers external resources
+extern osThreadDef_t   os_thread_def_osTimerThread;
+extern osThreadId      osThreadId_osTimerThread;
+extern osMessageQDef_t os_messageQ_def_osTimerMessageQ;
+extern osMessageQId    osMessageQId_osTimerMessageQ;
+
+
+// ==== Helper Functions ====
+
+/// Convert timeout in millisec to system ticks
+static uint32_t rt_ms2tick (uint32_t millisec) {
+  uint32_t tick;
+
+  if (millisec == osWaitForever) return 0xFFFF; // Indefinite timeout
+  if (millisec > 4000000) return 0xFFFE;        // Max ticks supported
+
+  tick = ((1000 * millisec) + os_clockrate - 1)  / os_clockrate;
+  if (tick > 0xFFFE) return 0xFFFE;
+
+  return tick;
+}
+
+/// Convert Thread ID to TCB pointer
+static P_TCB rt_tid2ptcb (osThreadId thread_id) {
+  P_TCB ptcb;
+
+  if (thread_id == NULL) return NULL;
+
+  if ((uint32_t)thread_id & 3) return NULL;
+
+#ifdef OS_SECTIONS_LINK_INFO
+  if ((os_section_id$$Base != 0) && (os_section_id$$Limit != 0)) {
+    if (thread_id  < (osThreadId)os_section_id$$Base)  return NULL;
+    if (thread_id >= (osThreadId)os_section_id$$Limit) return NULL;
+  }
+#endif
+
+  ptcb = thread_id;
+
+  if (ptcb->cb_type != TCB) return NULL;
+
+  return ptcb;
+}
+
+/// Convert ID pointer to Object pointer
+static void *rt_id2obj (void *id) {
+
+  if ((uint32_t)id & 3) return NULL;
+
+#ifdef OS_SECTIONS_LINK_INFO
+  if ((os_section_id$$Base != 0) && (os_section_id$$Limit != 0)) {
+    if (id  < (void *)os_section_id$$Base)  return NULL;
+    if (id >= (void *)os_section_id$$Limit) return NULL;
+  }
+#endif
+
+  return id;
+}
+
+
+// ==== Kernel Control ====
+
+uint8_t os_initialized;                         // Kernel Initialized flag
+uint8_t os_running;                             // Kernel Running flag
+
+// Kernel Control Service Calls declarations
+SVC_0_1(svcKernelInitialize, osStatus, RET_osStatus)
+SVC_0_1(svcKernelStart,      osStatus, RET_osStatus)
+SVC_0_1(svcKernelRunning,    int32_t,  RET_int32_t)
+
+extern void  sysThreadError   (osStatus status);
+osThreadId   svcThreadCreate  (osThreadDef_t *thread_def, void *argument);
+osMessageQId svcMessageCreate (osMessageQDef_t *queue_def, osThreadId thread_id);
+
+// Kernel Control Service Calls
+
+/// Initialize the RTOS Kernel for creating objects
+osStatus svcKernelInitialize (void) {
+  if (os_initialized) return osOK;
+
+  rt_sys_init();                                // RTX System Initialization
+  os_tsk.run->prio = 255;                       // Highest priority
+
+  sysThreadError(osOK);
+
+  os_initialized = 1;
+
+  return osOK;
+}
+
+/// Start the RTOS Kernel
+osStatus svcKernelStart (void) {
+
+  if (os_running) return osOK;
+
+  // Create OS Timers resources (Message Queue & Thread)
+  osMessageQId_osTimerMessageQ = svcMessageCreate (&os_messageQ_def_osTimerMessageQ, NULL);
+  osThreadId_osTimerThread = svcThreadCreate(&os_thread_def_osTimerThread, NULL);
+
+  rt_tsk_prio(0, 0);                            // Lowest priority
+//  __set_SP(os_tsk.run->tsk_stack + 8*4);       // New context
+  os_tsk.run = NULL;                            // Force context switch
+
+  rt_sys_start();
+
+  os_running = 1;
+
+  return osOK;
+}
+
+/// Check if the RTOS kernel is already started
+int32_t svcKernelRunning(void) {
+  return os_running;
+}
+
+// Kernel Control Public API
+
+/// Initialize the RTOS Kernel for creating objects
+osStatus osKernelInitialize (void) {
+  if (__get_CONTROL() == MODE_IRQ) return osErrorISR;     // Not allowed in ISR
+  if (__get_CONTROL() == MODE_SUPERVISOR)  {              // Privileged mode
+    return   svcKernelInitialize();
+  } else {
+    return __svcKernelInitialize();
+  }
+}
+
+/// Start the RTOS Kernel
+osStatus osKernelStart (void) {
+
+  if (__get_CONTROL() == MODE_IRQ) return osErrorISR;     // Not allowed in ISR
+  switch (__get_CONTROL()) {
+    case MODE_SUPERVISOR:                      // Privileged mode
+      break;
+    case MODE_USER:
+    case MODE_SYSTEM:                           // Unprivileged mode
+      return osErrorOS;
+    default:                                   // Other invalid modes
+      return osErrorOS;
+      break;
+  }
+  return svcKernelStart();
+}
+
+/// Check if the RTOS kernel is already started
+int32_t osKernelRunning(void) {
+  if ((__get_CONTROL() == MODE_IRQ) || (__get_CONTROL() == MODE_SUPERVISOR)) {
+    // in ISR or Privileged
+    return os_running;
+  } else {
+    return __svcKernelRunning();
+  }
+}
+
+
+// ==== Thread Management ====
+
+__NO_RETURN void osThreadExit (void);
+
+// Thread Service Calls declarations
+SVC_2_1(svcThreadCreate,      osThreadId, osThreadDef_t *, void *,     RET_pointer)
+SVC_0_1(svcThreadGetId,       osThreadId,                              RET_pointer)
+SVC_1_1(svcThreadTerminate,   osStatus,   osThreadId,                  RET_osStatus)
+SVC_0_1(svcThreadYield,       osStatus,                                RET_osStatus)
+SVC_2_1(svcThreadSetPriority, osStatus,   osThreadId,      osPriority, RET_osStatus)
+SVC_1_1(svcThreadGetPriority, osPriority, osThreadId,                  RET_osPriority)
+
+// Thread Service Calls
+extern OS_TID rt_get_TID (void);
+extern void   rt_init_context (P_TCB p_TCB, U8 priority, FUNCP task_body);
+
+/// Create a thread and add it to Active Threads and set it to state READY
+osThreadId svcThreadCreate (osThreadDef_t *thread_def, void *argument) {
+  P_TCB  ptcb;
+
+  if ((thread_def == NULL) ||
+      (thread_def->pthread == NULL) ||
+      (thread_def->tpriority < osPriorityIdle) ||
+      (thread_def->tpriority > osPriorityRealtime) ||
+      (thread_def->stacksize == 0) ||
+      (thread_def->stack_pointer == NULL) ) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  U8 priority = thread_def->tpriority - osPriorityIdle + 1;
+  P_TCB task_context = &thread_def->tcb;
+
+  /* Utilize the user provided stack. */
+  task_context->stack      = (U32*)thread_def->stack_pointer;
+  task_context->priv_stack = thread_def->stacksize;
+  /* Find a free entry in 'os_active_TCB' table. */
+  OS_TID tsk = rt_get_TID ();
+  os_active_TCB[tsk-1] = task_context;
+  task_context->task_id = tsk;
+  /* Pass parameter 'argv' to 'rt_init_context' */
+  task_context->msg = argument;
+  /* For 'size == 0' system allocates the user stack from the memory pool. */
+  rt_init_context (task_context, priority, (FUNCP)thread_def->pthread);
+
+  /* Dispatch this task to the scheduler for execution. */
+  DBG_TASK_NOTIFY(task_context, __TRUE);
+  rt_dispatch (task_context);
+
+  ptcb = (P_TCB)os_active_TCB[tsk - 1];         // TCB pointer
+
+  *((uint32_t *)ptcb->tsk_stack + TCB_STACK_LR_OFFSET_DWORDS) = (uint32_t)osThreadExit; /* LR = osThreadExit */
+
+  return ptcb;
+}
+
+/// Return the thread ID of the current running thread
+osThreadId svcThreadGetId (void) {
+  OS_TID tsk;
+
+  tsk = rt_tsk_self();
+  if (tsk == 0) return NULL;
+  return (P_TCB)os_active_TCB[tsk - 1];
+}
+
+/// Terminate execution of a thread and remove it from ActiveThreads
+osStatus svcThreadTerminate (osThreadId thread_id) {
+  OS_RESULT res;
+  P_TCB     ptcb;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return osErrorParameter;
+
+  res = rt_tsk_delete(ptcb->task_id);           // Delete task
+
+  if (res == OS_R_NOK) return osErrorResource;  // Delete task failed
+
+  return osOK;
+}
+
+/// Pass control to next thread that is in state READY
+osStatus svcThreadYield (void) {
+  rt_tsk_pass();                                // Pass control to next task
+  return osOK;
+}
+
+/// Change priority of an active thread
+osStatus svcThreadSetPriority (osThreadId thread_id, osPriority priority) {
+  OS_RESULT res;
+  P_TCB     ptcb;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return osErrorParameter;
+
+  if ((priority < osPriorityIdle) || (priority > osPriorityRealtime)) {
+    return osErrorValue;
+  }
+
+  res = rt_tsk_prio(                            // Change task priority
+    ptcb->task_id,                              // Task ID
+    priority - osPriorityIdle + 1               // New task priority
+  );
+
+  if (res == OS_R_NOK) return osErrorResource;  // Change task priority failed
+
+  return osOK;
+}
+
+/// Get current priority of an active thread
+osPriority svcThreadGetPriority (osThreadId thread_id) {
+  P_TCB ptcb;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return osPriorityError;
+
+  return (osPriority)(ptcb->prio - 1 + osPriorityIdle);
+}
+
+
+// Thread Public API
+
+/// Create a thread and add it to Active Threads and set it to state READY
+osThreadId osThreadCreate (osThreadDef_t *thread_def, void *argument) {
+  if (__get_CONTROL() == MODE_IRQ) return NULL;           // Not allowed in ISR
+  if ((__get_CONTROL() == MODE_SUPERVISOR) && (os_running == 0)) {
+    // Privileged and not running
+    return   svcThreadCreate(thread_def, argument);
+  } else {
+    return __svcThreadCreate(thread_def, argument);
+  }
+}
+
+/// Return the thread ID of the current running thread
+osThreadId osThreadGetId (void) {
+  if (__get_CONTROL() == MODE_IRQ) return NULL;           // Not allowed in ISR
+  return __svcThreadGetId();
+}
+
+/// Terminate execution of a thread and remove it from ActiveThreads
+osStatus osThreadTerminate (osThreadId thread_id) {
+  if (__get_CONTROL() == MODE_IRQ) return osErrorISR;     // Not allowed in ISR
+  return __svcThreadTerminate(thread_id);
+}
+
+/// Pass control to next thread that is in state READY
+osStatus osThreadYield (void) {
+  if (__get_CONTROL() == MODE_IRQ) return osErrorISR;     // Not allowed in ISR
+  return __svcThreadYield();
+}
+
+/// Change priority of an active thread
+osStatus osThreadSetPriority (osThreadId thread_id, osPriority priority) {
+  if (__get_CONTROL() == MODE_IRQ) return osErrorISR;     // Not allowed in ISR
+  return __svcThreadSetPriority(thread_id, priority);
+}
+
+/// Get current priority of an active thread
+osPriority osThreadGetPriority (osThreadId thread_id) {
+  if (__get_CONTROL() == MODE_IRQ) return osPriorityError;// Not allowed in ISR
+  return __svcThreadGetPriority(thread_id);
+}
+
+/// INTERNAL - Not Public
+/// Auto Terminate Thread on exit (used implicitly when thread exists)
+__NO_RETURN void osThreadExit (void) {
+  __svcThreadTerminate(__svcThreadGetId());
+  for (;;);                                     // Should never come here
+}
+
+
+// ==== Generic Wait Functions ====
+
+// Generic Wait Service Calls declarations
+SVC_1_1(svcDelay,           osStatus, uint32_t, RET_osStatus)
+#if osFeature_Wait != 0
+SVC_1_3(svcWait,  os_InRegs osEvent,  uint32_t, RET_osEvent)
+#endif
+
+// Generic Wait Service Calls
+
+/// Wait for Timeout (Time Delay)
+osStatus svcDelay (uint32_t millisec) {
+  if (millisec == 0) return osOK;
+  rt_dly_wait(rt_ms2tick(millisec));
+  return osEventTimeout;
+}
+
+/// Wait for Signal, Message, Mail, or Timeout
+#if osFeature_Wait != 0
+os_InRegs osEvent_type svcWait (uint32_t millisec) {
+  osEvent ret;
+
+  if (millisec == 0) {
+    ret.status = osOK;
+    return osEvent_ret_status;
+  }
+
+  /* To Do: osEventSignal, osEventMessage, osEventMail */
+  rt_dly_wait(rt_ms2tick(millisec));
+  ret.status = osEventTimeout;
+
+  return osEvent_ret_status;
+}
+#endif
+
+
+// Generic Wait API
+
+/// Wait for Timeout (Time Delay)
+osStatus osDelay (uint32_t millisec) {
+  if (__get_CONTROL() == MODE_IRQ)  return osErrorISR;     // Not allowed in ISR
+  return __svcDelay(millisec);
+}
+
+/// Wait for Signal, Message, Mail, or Timeout
+os_InRegs osEvent osWait (uint32_t millisec) {
+  osEvent ret;
+
+#if osFeature_Wait == 0
+  ret.status = osErrorOS;
+  return ret;
+#else
+  if (__get_CONTROL() == MODE_IRQ) {                      // Not allowed in ISR
+    ret.status = osErrorISR;
+    return ret;
+  }
+  return __svcWait(millisec);
+#endif
+}
+
+
+// ==== Timer Management ====
+
+// Timer definitions
+#define osTimerInvalid  0
+#define osTimerStopped  1
+#define osTimerRunning  2
+
+// Timer structures
+
+typedef struct os_timer_cb_ {                   // Timer Control Block
+  struct os_timer_cb_ *next;                    // Pointer to next active Timer
+  uint8_t             state;                    // Timer State
+  uint8_t              type;                    // Timer Type (Periodic/One-shot)
+  uint16_t         reserved;                    // Reserved
+  uint16_t             tcnt;                    // Timer Delay Count
+  uint16_t             icnt;                    // Timer Initial Count
+  void                 *arg;                    // Timer Function Argument
+  osTimerDef_t       *timer;                    // Pointer to Timer definition
+} os_timer_cb;
+
+// Timer variables
+os_timer_cb *os_timer_head;                     // Pointer to first active Timer
+
+
+// Timer Helper Functions
+
+// Insert Timer into the list sorted by time
+static void rt_timer_insert (os_timer_cb *pt, uint32_t tcnt) {
+  os_timer_cb *p, *prev;
+
+  prev = NULL;
+  p = os_timer_head;
+  while (p != NULL) {
+    if (tcnt < p->tcnt) break;
+    tcnt -= p->tcnt;
+    prev = p;
+    p = p->next;
+  }
+  pt->next = p;
+  pt->tcnt = (uint16_t)tcnt;
+  if (p != NULL) {
+    p->tcnt -= pt->tcnt;
+  }
+  if (prev != NULL) {
+    prev->next = pt;
+  } else {
+    os_timer_head = pt;
+  }
+}
+
+// Remove Timer from the list
+static int rt_timer_remove (os_timer_cb *pt) {
+  os_timer_cb *p, *prev;
+
+  prev = NULL;
+  p = os_timer_head;
+  while (p != NULL) {
+    if (p == pt) break;
+    prev = p;
+    p = p->next;
+  }
+  if (p == NULL) return -1;
+  if (prev != NULL) {
+    prev->next = pt->next;
+  } else {
+    os_timer_head = pt->next;
+  }
+  if (pt->next != NULL) {
+    pt->next->tcnt += pt->tcnt;
+  }
+
+  return 0;
+}
+
+
+// Timer Service Calls declarations
+SVC_3_1(svcTimerCreate,           osTimerId,  osTimerDef_t *, os_timer_type, void *, RET_pointer)
+SVC_2_1(svcTimerStart,            osStatus,   osTimerId,      uint32_t,              RET_osStatus)
+SVC_1_1(svcTimerStop,             osStatus,   osTimerId,                             RET_osStatus)
+SVC_1_1(svcTimerDelete,           osStatus,   osTimerId,                             RET_osStatus)
+SVC_1_2(svcTimerCall,   os_InRegs osCallback, osTimerId,                             RET_osCallback)
+
+// Timer Management Service Calls
+
+/// Create timer
+osTimerId svcTimerCreate (osTimerDef_t *timer_def, os_timer_type type, void *argument) {
+  os_timer_cb *pt;
+
+  if ((timer_def == NULL) || (timer_def->ptimer == NULL)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  pt = timer_def->timer;
+  if (pt == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  if ((type != osTimerOnce) && (type != osTimerPeriodic)) {
+    sysThreadError(osErrorValue);
+    return NULL;
+  }
+
+  if (osThreadId_osTimerThread == NULL) {
+    sysThreadError(osErrorResource);
+    return NULL;
+  }
+
+  if (pt->state != osTimerInvalid){
+    sysThreadError(osErrorResource);
+    return NULL;
+  }
+
+  pt->state = osTimerStopped;
+  pt->type  =  (uint8_t)type;
+  pt->arg   = argument;
+  pt->timer = timer_def;
+
+  return (osTimerId)pt;
+}
+
+/// Start or restart timer
+osStatus svcTimerStart (osTimerId timer_id, uint32_t millisec) {
+  os_timer_cb *pt;
+  uint32_t     tcnt;
+
+  pt = rt_id2obj(timer_id);
+  if (pt == NULL) return osErrorParameter;
+
+  tcnt = rt_ms2tick(millisec);
+  if (tcnt == 0) return osErrorValue;
+
+  switch (pt->state) {
+    case osTimerRunning:
+      if (rt_timer_remove(pt) != 0) {
+        return osErrorResource;
+      }
+      break;
+    case osTimerStopped:
+      pt->state = osTimerRunning;
+      pt->icnt  = (uint16_t)tcnt;
+      break;
+    default:
+      return osErrorResource;
+  }
+
+  rt_timer_insert(pt, tcnt);
+
+  return osOK;
+}
+
+/// Stop timer
+osStatus svcTimerStop (osTimerId timer_id) {
+  os_timer_cb *pt;
+
+  pt = rt_id2obj(timer_id);
+  if (pt == NULL) return osErrorParameter;
+
+  if (pt->state != osTimerRunning) return osErrorResource;
+
+  pt->state = osTimerStopped;
+
+  if (rt_timer_remove(pt) != 0) {
+    return osErrorResource;
+  }
+
+  return osOK;
+}
+
+/// Delete timer
+osStatus svcTimerDelete (osTimerId timer_id) {
+  os_timer_cb *pt;
+
+  pt = rt_id2obj(timer_id);
+  if (pt == NULL) return osErrorParameter;
+
+  switch (pt->state) {
+    case osTimerRunning:
+      rt_timer_remove(pt);
+      break;
+    case osTimerStopped:
+      break;
+    default:
+      return osErrorResource;
+  }
+
+  pt->state = osTimerInvalid;
+
+  return osOK;
+}
+
+/// Get timer callback parameters
+os_InRegs osCallback_type svcTimerCall (osTimerId timer_id) {
+  os_timer_cb *pt;
+  osCallback   ret;
+
+  pt = rt_id2obj(timer_id);
+  if (pt == NULL) {
+    ret.fp  = NULL;
+    ret.arg = NULL;
+    return osCallback_ret;
+  }
+
+  ret.fp  = (void *)pt->timer->ptimer;
+  ret.arg = pt->arg;
+
+  return osCallback_ret;
+}
+
+static __INLINE osStatus isrMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec);
+
+/// Timer Tick (called each SysTick)
+void sysTimerTick (void) {
+  os_timer_cb *pt, *p;
+
+  p = os_timer_head;
+  if (p == NULL) return;
+
+  p->tcnt--;
+  while ((p != NULL) && (p->tcnt == 0)) {
+    pt = p;
+    p = p->next;
+    os_timer_head = p;
+    isrMessagePut(osMessageQId_osTimerMessageQ, (uint32_t)pt, 0);
+    if (pt->type == osTimerPeriodic) {
+      rt_timer_insert(pt, pt->icnt);
+    } else {
+      pt->state = osTimerStopped;
+    }
+  }
+}
+
+
+// Timer Management Public API
+
+/// Create timer
+osTimerId osTimerCreate (osTimerDef_t *timer_def, os_timer_type type, void *argument) {
+  if (__get_CONTROL() == MODE_IRQ) return NULL;           // Not allowed in ISR
+  if ((__get_CONTROL() == MODE_SUPERVISOR) && (os_running == 0)) {
+    // Privileged and not running
+    return   svcTimerCreate(timer_def, type, argument);
+  } else {
+    return __svcTimerCreate(timer_def, type, argument);
+  }
+}
+
+/// Start or restart timer
+osStatus osTimerStart (osTimerId timer_id, uint32_t millisec) {
+  if (__get_CONTROL() == MODE_IRQ) return osErrorISR;     // Not allowed in ISR
+  return __svcTimerStart(timer_id, millisec);
+}
+
+/// Stop timer
+osStatus osTimerStop (osTimerId timer_id) {
+  if (__get_CONTROL() == MODE_IRQ) return osErrorISR;     // Not allowed in ISR
+  return __svcTimerStop(timer_id);
+}
+
+/// Delete timer
+osStatus osTimerDelete (osTimerId timer_id) {
+  if (__get_CONTROL() == MODE_IRQ) return osErrorISR;     // Not allowed in ISR
+  return __svcTimerDelete(timer_id);
+}
+
+/// INTERNAL - Not Public
+/// Get timer callback parameters (used by OS Timer Thread)
+os_InRegs osCallback osTimerCall (osTimerId timer_id) {
+  return __svcTimerCall(timer_id);
+}
+
+
+// Timer Thread
+__NO_RETURN void osTimerThread (void const *argument) {
+  osCallback cb;
+  osEvent    evt;
+
+  for (;;) {
+    evt = osMessageGet(osMessageQId_osTimerMessageQ, osWaitForever);
+    if (evt.status == osEventMessage) {
+      cb = osTimerCall(evt.value.p);
+      if (cb.fp != NULL) {
+        (*(os_ptimer)cb.fp)(cb.arg);
+      }
+    }
+  }
+}
+
+
+// ==== Signal Management ====
+
+// Signal Service Calls declarations
+SVC_2_1(svcSignalSet,             int32_t, osThreadId, int32_t,  RET_int32_t)
+SVC_2_1(svcSignalClear,           int32_t, osThreadId, int32_t,  RET_int32_t)
+SVC_1_1(svcSignalGet,             int32_t, osThreadId,           RET_int32_t)
+SVC_2_3(svcSignalWait,  os_InRegs osEvent, int32_t,    uint32_t, RET_osEvent)
+
+// Signal Service Calls
+
+/// Set the specified Signal Flags of an active thread
+int32_t svcSignalSet (osThreadId thread_id, int32_t signals) {
+  P_TCB   ptcb;
+  int32_t sig;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return 0x80000000;
+
+  if (signals & (0xFFFFFFFF << osFeature_Signals)) return 0x80000000;
+
+  sig = ptcb->events;                           // Previous signal flags
+
+  rt_evt_set(signals, ptcb->task_id);           // Set event flags
+
+  return sig;
+}
+
+/// Clear the specified Signal Flags of an active thread
+int32_t svcSignalClear (osThreadId thread_id, int32_t signals) {
+  P_TCB   ptcb;
+  int32_t sig;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return 0x80000000;
+
+  if (signals & (0xFFFFFFFF << osFeature_Signals)) return 0x80000000;
+
+  sig = ptcb->events;                           // Previous signal flags
+
+  rt_evt_clr(signals, ptcb->task_id);           // Clear event flags
+
+  return sig;
+}
+
+/// Get Signal Flags status of an active thread
+int32_t svcSignalGet (osThreadId thread_id) {
+  P_TCB ptcb;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return 0x80000000;
+
+  return ptcb->events;                          // Return event flags
+}
+
+/// Wait for one or more Signal Flags to become signaled for the current RUNNING thread
+os_InRegs osEvent_type svcSignalWait (int32_t signals, uint32_t millisec) {
+  OS_RESULT res;
+  osEvent   ret;
+
+  if (signals & (0xFFFFFFFF << osFeature_Signals)) {
+    ret.status = osErrorValue;
+    return osEvent_ret_status;
+  }
+
+  if (signals != 0) {                           // Wait for all specified signals
+    res = rt_evt_wait(signals, rt_ms2tick(millisec), __TRUE);
+  } else {                                      // Wait for any signal
+    res = rt_evt_wait(0xFFFF,  rt_ms2tick(millisec), __FALSE);
+  }
+
+  if (res == OS_R_EVT) {
+    ret.status = osEventSignal;
+    ret.value.signals = signals ? signals : os_tsk.run->waits;
+  } else {
+    ret.status = millisec ? osEventTimeout : osOK;
+    ret.value.signals = 0;
+  }
+
+  return osEvent_ret_value;
+}
+
+
+// Signal ISR Calls
+
+/// Set the specified Signal Flags of an active thread
+static __INLINE int32_t isrSignalSet (osThreadId thread_id, int32_t signals) {
+  P_TCB   ptcb;
+  int32_t sig;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return 0x80000000;
+
+  if (signals & (0xFFFFFFFF << osFeature_Signals)) return 0x80000000;
+
+  sig = ptcb->events;                           // Previous signal flags
+
+  isr_evt_set(signals, ptcb->task_id);          // Set event flags
+
+  return sig;
+}
+
+
+// Signal Public API
+
+/// Set the specified Signal Flags of an active thread
+int32_t osSignalSet (osThreadId thread_id, int32_t signals) {
+  if (__get_CONTROL() == MODE_IRQ) {                      // in ISR
+    return   isrSignalSet(thread_id, signals);
+  } else {                                      // in Thread
+    return __svcSignalSet(thread_id, signals);
+  }
+}
+
+/// Clear the specified Signal Flags of an active thread
+int32_t osSignalClear (osThreadId thread_id, int32_t signals) {
+  if (__get_CONTROL() == MODE_IRQ) return osErrorISR;     // Not allowed in ISR
+  return __svcSignalClear(thread_id, signals);
+}
+
+/// Get Signal Flags status of an active thread
+int32_t osSignalGet (osThreadId thread_id) {
+  if (__get_CONTROL() == MODE_IRQ) return osErrorISR;     // Not allowed in ISR
+  return __svcSignalGet(thread_id);
+}
+
+/// Wait for one or more Signal Flags to become signaled for the current RUNNING thread
+os_InRegs osEvent osSignalWait (int32_t signals, uint32_t millisec) {
+  osEvent ret;
+
+  if (__get_CONTROL() == MODE_IRQ) {                      // Not allowed in ISR
+    ret.status = osErrorISR;
+    return ret;
+  }
+  return __svcSignalWait(signals, millisec);
+}
+
+
+// ==== Mutex Management ====
+
+// Mutex Service Calls declarations
+SVC_1_1(svcMutexCreate,  osMutexId, osMutexDef_t *,           RET_pointer)
+SVC_2_1(svcMutexWait,    osStatus,  osMutexId,      uint32_t, RET_osStatus)
+SVC_1_1(svcMutexRelease, osStatus,  osMutexId,                RET_osStatus)
+SVC_1_1(svcMutexDelete,  osStatus,  osMutexId,                RET_osStatus)
+
+// Mutex Service Calls
+
+/// Create and Initialize a Mutex object
+osMutexId svcMutexCreate (osMutexDef_t *mutex_def) {
+  OS_ID mut;
+
+  if (mutex_def == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  mut = mutex_def->mutex;
+  if (mut == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  if (((P_MUCB)mut)->cb_type != 0) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  rt_mut_init(mut);                             // Initialize Mutex
+
+  return mut;
+}
+
+/// Wait until a Mutex becomes available
+osStatus svcMutexWait (osMutexId mutex_id, uint32_t millisec) {
+  OS_ID     mut;
+  OS_RESULT res;
+
+  mut = rt_id2obj(mutex_id);
+  if (mut == NULL) return osErrorParameter;
+
+  if (((P_MUCB)mut)->cb_type != MUCB) return osErrorParameter;
+
+  res = rt_mut_wait(mut, rt_ms2tick(millisec)); // Wait for Mutex
+
+  if (res == OS_R_TMO) {
+    return (millisec ? osErrorTimeoutResource : osErrorResource);
+  }
+
+  return osOK;
+}
+
+/// Release a Mutex that was obtained with osMutexWait
+osStatus svcMutexRelease (osMutexId mutex_id) {
+  OS_ID     mut;
+  OS_RESULT res;
+
+  mut = rt_id2obj(mutex_id);
+  if (mut == NULL) return osErrorParameter;
+
+  if (((P_MUCB)mut)->cb_type != MUCB) return osErrorParameter;
+
+  res = rt_mut_release(mut);                    // Release Mutex
+
+  if (res == OS_R_NOK) return osErrorResource;  // Thread not owner or Zero Counter
+
+  return osOK;
+}
+
+/// Delete a Mutex that was created by osMutexCreate
+osStatus svcMutexDelete (osMutexId mutex_id) {
+  OS_ID mut;
+
+  mut = rt_id2obj(mutex_id);
+  if (mut == NULL) return osErrorParameter;
+
+  if (((P_MUCB)mut)->cb_type != MUCB) return osErrorParameter;
+
+  rt_mut_delete(mut);                           // Release Mutex
+
+  return osOK;
+}
+
+
+// Mutex Public API
+
+/// Create and Initialize a Mutex object
+osMutexId osMutexCreate (osMutexDef_t *mutex_def) {
+  if (__get_CONTROL() == MODE_IRQ) return NULL;           // Not allowed in ISR
+  if ((__get_CONTROL() == MODE_SUPERVISOR) && (os_running == 0)) {
+    // Privileged and not running
+    return    svcMutexCreate(mutex_def);
+  } else {
+    return __svcMutexCreate(mutex_def);
+  }
+}
+
+/// Wait until a Mutex becomes available
+osStatus osMutexWait (osMutexId mutex_id, uint32_t millisec) {
+  if (__get_CONTROL() == MODE_IRQ) return osErrorISR;     // Not allowed in ISR
+  return __svcMutexWait(mutex_id, millisec);
+}
+
+/// Release a Mutex that was obtained with osMutexWait
+osStatus osMutexRelease (osMutexId mutex_id) {
+  if (__get_CONTROL() == MODE_IRQ) return osErrorISR;     // Not allowed in ISR
+  return __svcMutexRelease(mutex_id);
+}
+
+/// Delete a Mutex that was created by osMutexCreate
+osStatus osMutexDelete (osMutexId mutex_id) {
+  if (__get_CONTROL() == MODE_IRQ) return osErrorISR;     // Not allowed in ISR
+  return __svcMutexDelete(mutex_id);
+}
+
+
+// ==== Semaphore Management ====
+
+// Semaphore Service Calls declarations
+SVC_2_1(svcSemaphoreCreate,  osSemaphoreId, const osSemaphoreDef_t *,  int32_t, RET_pointer)
+SVC_2_1(svcSemaphoreWait,    int32_t,       osSemaphoreId,      uint32_t, RET_int32_t)
+SVC_1_1(svcSemaphoreRelease, osStatus,      osSemaphoreId,                RET_osStatus)
+SVC_1_1(svcSemaphoreDelete,  osStatus,            osSemaphoreId,                RET_osStatus)
+
+// Semaphore Service Calls
+
+/// Create and Initialize a Semaphore object
+osSemaphoreId svcSemaphoreCreate (const osSemaphoreDef_t *semaphore_def, int32_t count) {
+  OS_ID sem;
+
+  if (semaphore_def == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  sem = semaphore_def->semaphore;
+  if (sem == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  if (((P_SCB)sem)->cb_type != 0) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  if (count > osFeature_Semaphore) {
+    sysThreadError(osErrorValue);
+    return NULL;
+  }
+
+  rt_sem_init(sem, count);                      // Initialize Semaphore
+
+  return sem;
+}
+
+/// Wait until a Semaphore becomes available
+int32_t svcSemaphoreWait (osSemaphoreId semaphore_id, uint32_t millisec) {
+  OS_ID     sem;
+  OS_RESULT res;
+
+  sem = rt_id2obj(semaphore_id);
+  if (sem == NULL) return -1;
+
+  if (((P_SCB)sem)->cb_type != SCB) return -1;
+
+  res = rt_sem_wait(sem, rt_ms2tick(millisec)); // Wait for Semaphore
+
+  if (res == OS_R_TMO) return 0;                // Timeout
+
+  return (((P_SCB)sem)->tokens + 1);
+}
+
+/// Release a Semaphore
+osStatus svcSemaphoreRelease (osSemaphoreId semaphore_id) {
+  OS_ID sem;
+
+  sem = rt_id2obj(semaphore_id);
+  if (sem == NULL) return osErrorParameter;
+
+  if (((P_SCB)sem)->cb_type != SCB) return osErrorParameter;
+
+  if (((P_SCB)sem)->tokens == osFeature_Semaphore) return osErrorResource;
+
+  rt_sem_send(sem);                             // Release Semaphore
+
+  return osOK;
+}
+
+/// Delete a Semaphore that was created by osSemaphoreCreate
+osStatus svcSemaphoreDelete (osSemaphoreId semaphore_id) {
+  OS_ID sem;
+
+  sem = rt_id2obj(semaphore_id);
+  if (sem == NULL) return osErrorParameter;
+
+  if (((P_SCB)sem)->cb_type != SCB) return osErrorParameter;
+
+  rt_sem_delete(sem);                           // Delete Semaphore
+
+  return osOK;
+}
+
+
+// Semaphore ISR Calls
+
+/// Release a Semaphore
+static __INLINE osStatus isrSemaphoreRelease (osSemaphoreId semaphore_id) {
+  OS_ID sem;
+
+  sem = rt_id2obj(semaphore_id);
+  if (sem == NULL) return osErrorParameter;
+
+  if (((P_SCB)sem)->cb_type != SCB) return osErrorParameter;
+
+  if (((P_SCB)sem)->tokens == osFeature_Semaphore) return osErrorResource;
+
+  isr_sem_send(sem);                            // Release Semaphore
+
+  return osOK;
+}
+
+
+// Semaphore Public API
+
+/// Create and Initialize a Semaphore object
+osSemaphoreId osSemaphoreCreate (osSemaphoreDef_t *semaphore_def, int32_t count) {
+  if (__get_CONTROL() == MODE_IRQ) return NULL;           // Not allowed in ISR
+  if ((__get_CONTROL() == MODE_SUPERVISOR) && (os_running == 0)) {
+    // Privileged and not running
+    return   svcSemaphoreCreate(semaphore_def, count);
+  } else {
+    return __svcSemaphoreCreate(semaphore_def, count);
+  }
+}
+
+/// Wait until a Semaphore becomes available
+int32_t osSemaphoreWait (osSemaphoreId semaphore_id, uint32_t millisec) {
+  if (__get_CONTROL() == MODE_IRQ) return -1;             // Not allowed in ISR
+  return __svcSemaphoreWait(semaphore_id, millisec);
+}
+
+/// Release a Semaphore
+osStatus osSemaphoreRelease (osSemaphoreId semaphore_id) {
+  if (__get_CONTROL() == MODE_IRQ) {                      // in ISR
+    return   isrSemaphoreRelease(semaphore_id);
+  } else {                                      // in Thread
+    return __svcSemaphoreRelease(semaphore_id);
+  }
+}
+
+/// Delete a Semaphore that was created by osSemaphoreCreate
+osStatus osSemaphoreDelete (osSemaphoreId semaphore_id) {
+  if (__get_CONTROL() == MODE_IRQ) return osErrorISR;     // Not allowed in ISR
+  return __svcSemaphoreDelete(semaphore_id);
+}
+
+
+// ==== Memory Management Functions ====
+
+// Memory Management Helper Functions
+
+// Clear Memory Box (Zero init)
+static void rt_clr_box (void *box_mem, void *box) {
+  uint32_t *p, n;
+
+  if (box) {
+    p = box;
+    for (n = ((P_BM)box_mem)->blk_size; n; n -= 4) {
+      *p++ = 0;
+    }
+  }
+}
+
+// Memory Management Service Calls declarations
+SVC_1_1(svcPoolCreate, osPoolId, const osPoolDef_t *,           RET_pointer)
+SVC_2_1(sysPoolAlloc,  void *,   osPoolId,      uint32_t, RET_pointer)
+SVC_2_1(sysPoolFree,   osStatus, osPoolId,      void *,   RET_osStatus)
+
+// Memory Management Service & ISR Calls
+
+/// Create and Initialize memory pool
+osPoolId svcPoolCreate (const osPoolDef_t *pool_def) {
+  uint32_t blk_sz;
+
+  if ((pool_def == NULL) ||
+      (pool_def->pool_sz == 0) ||
+      (pool_def->item_sz == 0) ||
+      (pool_def->pool == NULL)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  blk_sz = (pool_def->item_sz + 3) & ~3;
+
+  _init_box(pool_def->pool, sizeof(struct OS_BM) + pool_def->pool_sz * blk_sz, blk_sz);
+
+  return pool_def->pool;
+}
+
+/// Allocate a memory block from a memory pool
+void *sysPoolAlloc (osPoolId pool_id, uint32_t clr) {
+  void *ptr;
+
+  if (pool_id == NULL) return NULL;
+
+  ptr = rt_alloc_box(pool_id);
+  if (clr) {
+    rt_clr_box(pool_id, ptr);
+  }
+
+  return ptr;
+}
+
+/// Return an allocated memory block back to a specific memory pool
+osStatus sysPoolFree (osPoolId pool_id, void *block) {
+  int32_t res;
+
+  if (pool_id == NULL) return osErrorParameter;
+
+  res = rt_free_box(pool_id, block);
+  if (res != 0) return osErrorValue;
+
+  return osOK;
+}
+
+
+// Memory Management Public API
+
+/// Create and Initialize memory pool
+osPoolId osPoolCreate (osPoolDef_t *pool_def) {
+  if (__get_CONTROL() == MODE_IRQ) return NULL;           // Not allowed in ISR
+  if ((__get_CONTROL() == MODE_SUPERVISOR) && (os_running == 0)) {
+    // Privileged and not running
+    return   svcPoolCreate(pool_def);
+  } else {
+    return __svcPoolCreate(pool_def);
+  }
+}
+
+/// Allocate a memory block from a memory pool
+void *osPoolAlloc (osPoolId pool_id) {
+  if ((__get_CONTROL() == MODE_IRQ) || (__get_CONTROL()  == MODE_SUPERVISOR)) {    // in ISR or Privileged
+    return   sysPoolAlloc(pool_id, 0);
+  } else {                                      // in Thread
+    return __sysPoolAlloc(pool_id, 0);
+  }
+}
+
+/// Allocate a memory block from a memory pool and set memory block to zero
+void *osPoolCAlloc (osPoolId pool_id) {
+  if ((__get_CONTROL() == MODE_IRQ) || (__get_CONTROL() == MODE_SUPERVISOR)) {    // in ISR or Privileged
+    return   sysPoolAlloc(pool_id, 1);
+  } else {                                      // in Thread
+    return __sysPoolAlloc(pool_id, 1);
+  }
+}
+
+/// Return an allocated memory block back to a specific memory pool
+osStatus osPoolFree (osPoolId pool_id, void *block) {
+  if ((__get_CONTROL() == MODE_IRQ) || (__get_CONTROL() == MODE_SUPERVISOR)) {    // in ISR or Privileged
+    return   sysPoolFree(pool_id, block);
+  } else {                                      // in Thread
+    return __sysPoolFree(pool_id, block);
+  }
+}
+
+
+// ==== Message Queue Management Functions ====
+
+// Message Queue Management Service Calls declarations
+SVC_2_1(svcMessageCreate,        osMessageQId,    osMessageQDef_t *, osThreadId,           RET_pointer)
+SVC_3_1(svcMessagePut,              osStatus,     osMessageQId,      uint32_t,   uint32_t, RET_osStatus)
+SVC_2_3(svcMessageGet,    os_InRegs osEvent,      osMessageQId,      uint32_t,             RET_osEvent)
+
+// Message Queue Service Calls
+
+/// Create and Initialize Message Queue
+osMessageQId svcMessageCreate (osMessageQDef_t *queue_def, osThreadId thread_id) {
+
+  if ((queue_def == NULL) ||
+      (queue_def->queue_sz == 0) ||
+      (queue_def->pool == NULL)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  if (((P_MCB)queue_def->pool)->cb_type != 0) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  rt_mbx_init(queue_def->pool, 4*(queue_def->queue_sz + 4));
+
+  return queue_def->pool;
+}
+
+/// Put a Message to a Queue
+osStatus svcMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec) {
+  OS_RESULT res;
+
+  if (queue_id == NULL) return osErrorParameter;
+
+  if (((P_MCB)queue_id)->cb_type != MCB) return osErrorParameter;
+
+  res = rt_mbx_send(queue_id, (void *)info, rt_ms2tick(millisec));
+
+  if (res == OS_R_TMO) {
+    return (millisec ? osErrorTimeoutResource : osErrorResource);
+  }
+
+  return osOK;
+}
+
+/// Get a Message or Wait for a Message from a Queue
+os_InRegs osEvent_type svcMessageGet (osMessageQId queue_id, uint32_t millisec) {
+  OS_RESULT res;
+  osEvent   ret;
+
+  if (queue_id == NULL) {
+    ret.status = osErrorParameter;
+    return osEvent_ret_status;
+  }
+
+  if (((P_MCB)queue_id)->cb_type != MCB) {
+    ret.status = osErrorParameter;
+    return osEvent_ret_status;
+  }
+
+  res = rt_mbx_wait(queue_id, &ret.value.p, rt_ms2tick(millisec));
+
+  if (res == OS_R_TMO) {
+    ret.status = millisec ? osEventTimeout : osOK;
+    return osEvent_ret_value;
+  }
+
+  ret.status = osEventMessage;
+
+  return osEvent_ret_value;
+}
+
+
+// Message Queue ISR Calls
+
+/// Put a Message to a Queue
+static __INLINE osStatus isrMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec) {
+
+  if ((queue_id == NULL) || (millisec != 0)) {
+    return osErrorParameter;
+  }
+
+  if (((P_MCB)queue_id)->cb_type != MCB) return osErrorParameter;
+
+  if (rt_mbx_check(queue_id) == 0) {            // Check if Queue is full
+    return osErrorResource;
+  }
+
+  isr_mbx_send(queue_id, (void *)info);
+
+  return osOK;
+}
+
+/// Get a Message or Wait for a Message from a Queue
+static __INLINE os_InRegs osEvent isrMessageGet (osMessageQId queue_id, uint32_t millisec) {
+  OS_RESULT res;
+  osEvent   ret;
+
+  if ((queue_id == NULL) || (millisec != 0)) {
+    ret.status = osErrorParameter;
+    return ret;
+  }
+
+  if (((P_MCB)queue_id)->cb_type != MCB) {
+    ret.status = osErrorParameter;
+    return ret;
+  }
+
+  res = isr_mbx_receive(queue_id, &ret.value.p);
+
+  if (res != OS_R_MBX) {
+    ret.status = osOK;
+    return ret;
+  }
+
+  ret.status = osEventMessage;
+
+  return ret;
+}
+
+
+// Message Queue Management Public API
+
+/// Create and Initialize Message Queue
+osMessageQId osMessageCreate (osMessageQDef_t *queue_def, osThreadId thread_id) {
+  if (__get_CONTROL() == MODE_IRQ) return NULL;           // Not allowed in ISR
+  if ((__get_CONTROL() == MODE_SUPERVISOR) && (os_running == 0)) {
+    // Privileged and not running
+    return   svcMessageCreate(queue_def, thread_id);
+  } else {
+    return __svcMessageCreate(queue_def, thread_id);
+  }
+}
+
+/// Put a Message to a Queue
+osStatus osMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec) {
+  if (__get_CONTROL() == MODE_IRQ) {                      // in ISR
+    return   isrMessagePut(queue_id, info, millisec);
+  } else {                                      // in Thread
+    return __svcMessagePut(queue_id, info, millisec);
+  }
+}
+
+/// Get a Message or Wait for a Message from a Queue
+os_InRegs osEvent osMessageGet (osMessageQId queue_id, uint32_t millisec) {
+  if (__get_CONTROL() == MODE_IRQ) {                      // in ISR
+    return   isrMessageGet(queue_id, millisec);
+  } else {                                      // in Thread
+    return __svcMessageGet(queue_id, millisec);
+  }
+}
+
+
+// ==== Mail Queue Management Functions ====
+
+// Mail Queue Management Service Calls declarations
+SVC_2_1(svcMailCreate, osMailQId, osMailQDef_t *, osThreadId,                   RET_pointer)
+SVC_4_1(sysMailAlloc,  void *,    osMailQId,      uint32_t, uint32_t, uint32_t, RET_pointer)
+SVC_3_1(sysMailFree,   osStatus,  osMailQId,      void *,   uint32_t,           RET_osStatus)
+
+// Mail Queue Management Service & ISR Calls
+
+/// Create and Initialize mail queue
+osMailQId svcMailCreate (osMailQDef_t *queue_def, osThreadId thread_id) {
+  uint32_t blk_sz;
+  P_MCB    pmcb;
+  void    *pool;
+
+  if ((queue_def == NULL) ||
+      (queue_def->queue_sz == 0) ||
+      (queue_def->item_sz  == 0) ||
+      (queue_def->pool == NULL)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  pmcb = *(((void **)queue_def->pool) + 0);
+  pool = *(((void **)queue_def->pool) + 1);
+
+  if ((pool == NULL) || (pmcb == NULL) || (pmcb->cb_type != 0)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  blk_sz = (queue_def->item_sz + 3) & ~3;
+
+  _init_box(pool, sizeof(struct OS_BM) + queue_def->queue_sz * blk_sz, blk_sz);
+
+  rt_mbx_init(pmcb, 4*(queue_def->queue_sz + 4));
+
+
+  return queue_def->pool;
+}
+
+/// Allocate a memory block from a mail
+void *sysMailAlloc (osMailQId queue_id, uint32_t millisec, uint32_t isr, uint32_t clr) {
+  P_MCB pmcb;
+  void *pool;
+  void *mem;
+
+  if (queue_id == NULL) return NULL;
+
+  pmcb = *(((void **)queue_id) + 0);
+  pool = *(((void **)queue_id) + 1);
+
+  if ((pool == NULL) || (pmcb == NULL)) return NULL;
+
+  if (isr && (millisec != 0)) return NULL;
+
+  mem = rt_alloc_box(pool);
+  if (clr) {
+    rt_clr_box(pool, mem);
+  }
+
+  if ((mem == NULL) && (millisec != 0)) {
+    // Put Task to sleep when Memory not available
+    if (pmcb->p_lnk != NULL) {
+      rt_put_prio((P_XCB)pmcb, os_tsk.run);
+    } else {
+      pmcb->p_lnk = os_tsk.run;
+      os_tsk.run->p_lnk = NULL;
+      os_tsk.run->p_rlnk = (P_TCB)pmcb;
+      // Task is waiting to allocate a message
+      pmcb->state = 3;
+    }
+    rt_block(rt_ms2tick(millisec), WAIT_MBX);
+  }
+
+  return mem;
+}
+
+/// Free a memory block from a mail
+osStatus sysMailFree (osMailQId queue_id, void *mail, uint32_t isr) {
+  P_MCB   pmcb;
+  P_TCB   ptcb;
+  void   *pool;
+  void   *mem;
+  int32_t res;
+
+  if (queue_id == NULL) return osErrorParameter;
+
+  pmcb = *(((void **)queue_id) + 0);
+  pool = *(((void **)queue_id) + 1);
+
+  if ((pmcb == NULL) || (pool == NULL)) return osErrorParameter;
+
+  res = rt_free_box(pool, mail);
+
+  if (res != 0) return osErrorValue;
+
+  if (pmcb->state == 3) {
+    // Task is waiting to allocate a message
+    if (isr) {
+      rt_psq_enq (pmcb, (U32)pool);
+      rt_psh_req ();
+    } else {
+      mem = rt_alloc_box(pool);
+      if (mem != NULL) {
+        ptcb = rt_get_first((P_XCB)pmcb);
+        if (pmcb->p_lnk == NULL) {
+          pmcb->state = 0;
+        }
+        rt_ret_val(ptcb, (U32)mem);
+        rt_rmv_dly(ptcb);
+        rt_dispatch(ptcb);
+      }
+    }
+  }
+
+  return osOK;
+}
+
+
+// Mail Queue Management Public API
+
+/// Create and Initialize mail queue
+osMailQId osMailCreate (osMailQDef_t *queue_def, osThreadId thread_id) {
+  if (__get_CONTROL() == MODE_IRQ) return NULL;           // Not allowed in ISR
+  if ((__get_CONTROL() == MODE_SUPERVISOR) && (os_running == 0)) {
+    // Privileged and not running
+    return   svcMailCreate(queue_def, thread_id);
+  } else {
+    return __svcMailCreate(queue_def, thread_id);
+  }
+}
+
+/// Allocate a memory block from a mail
+void *osMailAlloc (osMailQId queue_id, uint32_t millisec) {
+  if (__get_CONTROL() == MODE_IRQ) {                      // in ISR
+    return   sysMailAlloc(queue_id, millisec, 1, 0);
+  } else {                                      // in Thread
+    return __sysMailAlloc(queue_id, millisec, 0, 0);
+  }
+}
+
+/// Allocate a memory block from a mail and set memory block to zero
+void *osMailCAlloc (osMailQId queue_id, uint32_t millisec) {
+  if (__get_CONTROL() == MODE_IRQ) {                      // in ISR
+    return   sysMailAlloc(queue_id, millisec, 1, 1);
+  } else {                                      // in Thread
+    return __sysMailAlloc(queue_id, millisec, 0, 1);
+  }
+}
+
+/// Free a memory block from a mail
+osStatus osMailFree (osMailQId queue_id, void *mail) {
+  if (__get_CONTROL() == MODE_IRQ) {                      // in ISR
+    return   sysMailFree(queue_id, mail, 1);
+  } else {                                      // in Thread
+    return __sysMailFree(queue_id, mail, 0);
+  }
+}
+
+/// Put a mail to a queue
+osStatus osMailPut (osMailQId queue_id, void *mail) {
+  if (queue_id == NULL) return osErrorParameter;
+  if (mail == NULL)     return osErrorValue;
+  return osMessagePut(*((void **)queue_id), (uint32_t)mail, 0);
+}
+
+/// Get a mail from a queue
+os_InRegs osEvent osMailGet (osMailQId queue_id, uint32_t millisec) {
+  osEvent ret;
+
+  if (queue_id == NULL) {
+    ret.status = osErrorParameter;
+    return ret;
+  }
+
+  ret = osMessageGet(*((void **)queue_id), millisec);
+  if (ret.status == osEventMessage) ret.status = osEventMail;
+
+  return ret;
+}
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_Event.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_Event.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,190 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_EVENT.C
+ *      Purpose: Implements waits and wake-ups for event flags
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Conf.h"
+#include "rt_System.h"
+#include "rt_Event.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#include "rt_HAL_CM.h"
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_evt_wait -----------------------------------*/
+
+OS_RESULT rt_evt_wait (U16 wait_flags, U16 timeout, BOOL and_wait) {
+  /* Wait for one or more event flags with optional time-out.                */
+  /* "wait_flags" identifies the flags to wait for.                          */
+  /* "timeout" is the time-out limit in system ticks (0xffff if no time-out) */
+  /* "and_wait" specifies the AND-ing of "wait_flags" as condition to be met */
+  /* to complete the wait. (OR-ing if set to 0).                             */
+  U32 block_state;
+
+  if (and_wait) {
+    /* Check for AND-connected events */
+    if ((os_tsk.run->events & wait_flags) == wait_flags) {
+      os_tsk.run->events &= ~wait_flags;
+      return (OS_R_EVT);
+    }
+    block_state = WAIT_AND;
+  }
+  else {
+    /* Check for OR-connected events */
+    if (os_tsk.run->events & wait_flags) {
+      os_tsk.run->waits = os_tsk.run->events & wait_flags;
+      os_tsk.run->events &= ~wait_flags;
+      return (OS_R_EVT);
+    }
+    block_state = WAIT_OR;
+  }
+  /* Task has to wait */
+  os_tsk.run->waits = wait_flags;
+  rt_block (timeout, (U8)block_state);
+  return (OS_R_TMO);
+}
+
+
+/*--------------------------- rt_evt_set ------------------------------------*/
+
+void rt_evt_set (U16 event_flags, OS_TID task_id) {
+  /* Set one or more event flags of a selectable task. */
+  P_TCB p_tcb;
+
+  p_tcb = os_active_TCB[task_id-1];
+  if (p_tcb == NULL) {
+    return;
+  }
+  p_tcb->events |= event_flags;
+  event_flags    = p_tcb->waits;
+  /* If the task is not waiting for an event, it should not be put */
+  /* to ready state. */
+  if (p_tcb->state == WAIT_AND) {
+    /* Check for AND-connected events */
+    if ((p_tcb->events & event_flags) == event_flags) {
+      goto wkup;
+    }
+  }
+  if (p_tcb->state == WAIT_OR) {
+    /* Check for OR-connected events */
+    if (p_tcb->events & event_flags) {
+      p_tcb->waits  &= p_tcb->events;
+wkup: p_tcb->events &= ~event_flags;
+      rt_rmv_dly (p_tcb);
+      p_tcb->state   = READY;
+#ifdef __CMSIS_RTOS
+      rt_ret_val2(p_tcb, 0x08/*osEventSignal*/, p_tcb->waits);
+#else
+      rt_ret_val (p_tcb, OS_R_EVT);
+#endif
+      rt_dispatch (p_tcb);
+    }
+  }
+}
+
+
+/*--------------------------- rt_evt_clr ------------------------------------*/
+
+void rt_evt_clr (U16 clear_flags, OS_TID task_id) {
+  /* Clear one or more event flags (identified by "clear_flags") of a */
+  /* selectable task (identified by "task"). */
+  P_TCB task = os_active_TCB[task_id-1];
+
+  if (task == NULL) {
+    return;
+  }
+  task->events &= ~clear_flags;
+}
+
+
+/*--------------------------- isr_evt_set -----------------------------------*/
+
+void isr_evt_set (U16 event_flags, OS_TID task_id) {
+  /* Same function as "os_evt_set", but to be called by ISRs. */
+  P_TCB p_tcb = os_active_TCB[task_id-1];
+
+  if (p_tcb == NULL) {
+    return;
+  }
+  rt_psq_enq (p_tcb, event_flags);
+  rt_psh_req ();
+}
+
+
+/*--------------------------- rt_evt_get ------------------------------------*/
+
+U16 rt_evt_get (void) {
+  /* Get events of a running task after waiting for OR connected events. */
+  return (os_tsk.run->waits);
+}
+
+
+/*--------------------------- rt_evt_psh ------------------------------------*/
+
+void rt_evt_psh (P_TCB p_CB, U16 set_flags) {
+  /* Check if task has to be waken up */
+  U16 event_flags;
+
+  p_CB->events |= set_flags;
+  event_flags = p_CB->waits;
+  if (p_CB->state == WAIT_AND) {
+    /* Check for AND-connected events */
+    if ((p_CB->events & event_flags) == event_flags) {
+      goto rdy;
+    }
+  }
+  if (p_CB->state == WAIT_OR) {
+    /* Check for OR-connected events */
+    if (p_CB->events & event_flags) {
+      p_CB->waits  &= p_CB->events;
+rdy:  p_CB->events &= ~event_flags;
+      rt_rmv_dly (p_CB);
+      p_CB->state   = READY;
+#ifdef __CMSIS_RTOS
+      rt_ret_val2(p_CB, 0x08/*osEventSignal*/, p_CB->waits);
+#else
+      rt_ret_val (p_CB, OS_R_EVT);
+#endif
+      rt_put_prio (&os_rdy, p_CB);
+    }
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_Event.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_Event.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,46 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_EVENT.H
+ *      Purpose: Implements waits and wake-ups for event flags
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+extern OS_RESULT rt_evt_wait (U16 wait_flags,  U16 timeout, BOOL and_wait);
+extern void      rt_evt_set  (U16 event_flags, OS_TID task_id);
+extern void      rt_evt_clr  (U16 clear_flags, OS_TID task_id);
+extern void      isr_evt_set (U16 event_flags, OS_TID task_id);
+extern U16       rt_evt_get  (void);
+extern void      rt_evt_psh  (P_TCB p_CB, U16 set_flags);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_HAL_CM.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_HAL_CM.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,216 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_HAL_CM.H
+ *      Purpose: Hardware Abstraction Layer for Cortex-M definitions
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "cmsis.h"
+/* Definitions */
+#define INITIAL_xPSR    0x10000000
+#define DEMCR_TRCENA    0x01000000
+#define ITM_ITMENA      0x00000001
+#define MAGIC_WORD      0xE25A2EA5
+
+#define SYS_TICK_IRQn TIMER0_IRQn
+
+extern void rt_set_PSP (U32 stack);
+extern U32  rt_get_PSP (void);
+extern void os_set_env (void);
+extern void SysTick_Handler (void);
+extern void *_alloc_box (void *box_mem);
+extern int  _free_box (void *box_mem, void *box);
+
+extern void rt_init_stack (P_TCB p_TCB, FUNCP task_body);
+extern void rt_ret_val  (P_TCB p_TCB, U32 v0);
+extern void rt_ret_val2 (P_TCB p_TCB, U32 v0, U32 v1);
+
+extern void dbg_init (void);
+extern void dbg_task_notify (P_TCB p_tcb, BOOL create);
+extern void dbg_task_switch (U32 task_id);
+
+
+#if defined (__CC_ARM)          /* ARM Compiler */
+
+#if ((__TARGET_ARCH_7_M || __TARGET_ARCH_7E_M) && !NO_EXCLUSIVE_ACCESS)
+ #define __USE_EXCLUSIVE_ACCESS
+#else
+ #undef  __USE_EXCLUSIVE_ACCESS
+#endif
+
+#elif defined (__GNUC__)        /* GNU Compiler */
+
+#undef  __USE_EXCLUSIVE_ACCESS
+
+#if defined (__CORTEX_M0) || defined (__CORTEX_M0PLUS)
+#define __TARGET_ARCH_6S_M 1
+#else
+#define __TARGET_ARCH_6S_M 0
+#endif
+
+#if defined (__VFP_FP__) && !defined(__SOFTFP__)
+#define __TARGET_FPU_VFP 1
+#else
+#define __TARGET_FPU_VFP 0
+#endif
+
+#define __inline inline
+#define __weak   __attribute__((weak))
+
+
+#elif defined (__ICCARM__)      /* IAR Compiler */
+
+#undef  __USE_EXCLUSIVE_ACCESS
+
+#if (__CORE__ == __ARM6M__)
+#define __TARGET_ARCH_6S_M 1
+#else
+#define __TARGET_ARCH_6S_M 0
+#endif
+
+#if defined __ARMVFP__
+#define __TARGET_FPU_VFP 1
+#else
+#define __TARGET_FPU_VFP 0
+#endif
+
+#define __inline inline
+
+#endif
+
+
+/* NVIC registers */
+
+#define OS_PEND_IRQ()   NVIC_PendIRQ(SYS_TICK_IRQn)
+#define OS_PENDING      NVIC_PendingIRQ(SYS_TICK_IRQn)
+#define OS_UNPEND(fl)   NVIC_UnpendIRQ(SYS_TICK_IRQn)
+#define OS_PEND(fl,p)   NVIC_PendIRQ(SYS_TICK_IRQn)
+#define OS_LOCK()       NVIC_DisableIRQ(SYS_TICK_IRQn)
+#define OS_UNLOCK()     NVIC_EnableIRQ(SYS_TICK_IRQn)
+
+#define OS_X_PENDING    NVIC_PendingIRQ(SYS_TICK_IRQn)
+#define OS_X_UNPEND(fl) NVIC_UnpendIRQ(SYS_TICK_IRQn)
+#define OS_X_PEND(fl,p) NVIC_PendIRQ(SYS_TICK_IRQn)
+
+#define OS_X_INIT(n)    NVIC_EnableIRQ(n)
+#define OS_X_LOCK(n)    NVIC_DisableIRQ(n)
+#define OS_X_UNLOCK(n)  NVIC_EnableIRQ(n)
+
+/* Variables */
+extern BIT dbg_msg;
+
+/* Functions */
+#ifdef __USE_EXCLUSIVE_ACCESS
+ #define rt_inc(p)     while(__strex((__ldrex(p)+1),p))
+ #define rt_dec(p)     while(__strex((__ldrex(p)-1),p))
+#else
+ #define rt_inc(p)     __disable_irq();(*p)++;__enable_irq();
+ #define rt_dec(p)     __disable_irq();(*p)--;__enable_irq();
+#endif
+
+__inline static U32 rt_inc_qi (U32 size, U8 *count, U8 *first) {
+  U32 cnt,c2;
+#ifdef __USE_EXCLUSIVE_ACCESS
+  do {
+    if ((cnt = __ldrex(count)) == size) {
+      __clrex();
+      return (cnt); }
+  } while (__strex(cnt+1, count));
+  do {
+    c2 = (cnt = __ldrex(first)) + 1;
+    if (c2 == size) c2 = 0;
+  } while (__strex(c2, first));
+#else
+  __disable_irq();
+  if ((cnt = *count) < size) {
+    *count = cnt+1;
+    c2 = (cnt = *first) + 1;
+    if (c2 == size) c2 = 0;
+    *first = c2;
+  }
+  __enable_irq ();
+#endif
+  return (cnt);
+}
+
+__inline static void rt_systick_init (void) {
+#if SYS_TICK_IRQn == TIMER0_IRQn
+ #define SYS_TICK_TIMER  LPC_TIM0
+ LPC_SC->PCONP |= (1 << PCTIM0);
+ LPC_SC->PCLKSEL0 = (LPC_SC->PCLKSEL0 & (~(1<<3))) | (1<<2); //PCLK == CPUCLK
+#elif SYS_TICK_IRQn == TIMER1_IRQn
+ #define SYS_TICK_TIMER LPC_TIM1
+ LPC_SC->PCONP |= (1 << PCTIM1);
+ LPC_SC->PCLKSEL0 = (LPC_SC->PCLKSEL0 & (~(1<<5))) | (1<<4); //PCLK == CPUCLK
+#elif SYS_TICK_IRQn == TIMER2_IRQn
+ #define SYS_TICK_TIMER LPC_TIM2
+ LPC_SC->PCONP |= (1 << PCTIM2);
+ LPC_SC->PCLKSEL1 = (LPC_SC->PCLKSEL1 & (~(1<<13))) | (1<<12); //PCLK == CPUCLK
+#else
+ #define SYS_TICK_TIMER LPC_TIM3
+ LPC_SC->PCONP |= (1 << PCTIM3);
+ LPC_SC->PCLKSEL1 = (LPC_SC->PCLKSEL1 & (~(1<<15))) | (1<<14); //PCLK == CPUCLK
+#endif
+
+  // setup Timer to count forever
+  //interrupt_reg
+  SYS_TICK_TIMER->TCR = 2; // reset & disable timer 0
+  SYS_TICK_TIMER->TC = os_trv;
+  SYS_TICK_TIMER->PR = 0; // set the prescale divider
+  //Reset of TC and Interrupt when MR3  MR2 matches TC
+  SYS_TICK_TIMER->MCR = (1 << 9) |(1 << 10); //TMCR_MR3_R_Msk | TMCR_MR3_I_Msk
+  SYS_TICK_TIMER->MR3 = os_trv; // match registers
+  SYS_TICK_TIMER->CCR = 0; // disable compare registers
+  SYS_TICK_TIMER->EMR = 0; // disable external match register
+  // initialize the interrupt vector
+  NVIC_SetVector(SYS_TICK_IRQn, (uint32_t)&SysTick_Handler);
+  SYS_TICK_TIMER->TCR = 1; // enable timer 0
+}
+
+__inline static void rt_svc_init (void) {
+// TODO: add svcInit
+
+}
+
+#ifdef DBG_MSG
+#define DBG_INIT() dbg_init()
+#define DBG_TASK_NOTIFY(p_tcb,create) if (dbg_msg) dbg_task_notify(p_tcb,create)
+#define DBG_TASK_SWITCH(task_id)      if (dbg_msg && (os_tsk.new_tsk != os_tsk.run)) \
+                                                   dbg_task_switch(task_id)
+#else
+#define DBG_INIT()
+#define DBG_TASK_NOTIFY(p_tcb,create)
+#define DBG_TASK_SWITCH(task_id)
+#endif
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_List.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_List.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,320 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_LIST.C
+ *      Purpose: Functions for the management of different lists
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Conf.h"
+#include "rt_System.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#include "rt_Time.h"
+#include "rt_HAL_CM.h"
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+/* List head of chained ready tasks */
+struct OS_XCB  os_rdy;
+/* List head of chained delay tasks */
+struct OS_XCB  os_dly;
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_put_prio -----------------------------------*/
+
+void rt_put_prio (P_XCB p_CB, P_TCB p_task) {
+  /* Put task identified with "p_task" into list ordered by priority.       */
+  /* "p_CB" points to head of list; list has always an element at end with  */
+  /* a priority less than "p_task->prio".                                   */
+  P_TCB p_CB2;
+  U32 prio;
+  BOOL sem_mbx = __FALSE;
+
+  if (p_CB->cb_type == SCB || p_CB->cb_type == MCB || p_CB->cb_type == MUCB) {
+    sem_mbx = __TRUE;
+  }
+  prio = p_task->prio;
+  p_CB2 = p_CB->p_lnk;
+  /* Search for an entry in the list */
+  while (p_CB2 != NULL && prio <= p_CB2->prio) {
+    p_CB = (P_XCB)p_CB2;
+    p_CB2 = p_CB2->p_lnk;
+  }
+  /* Entry found, insert the task into the list */
+  p_task->p_lnk = p_CB2;
+  p_CB->p_lnk = p_task;
+  if (sem_mbx) {
+    if (p_CB2 != NULL) {
+      p_CB2->p_rlnk = p_task;
+    }
+    p_task->p_rlnk = (P_TCB)p_CB;
+  }
+  else {
+    p_task->p_rlnk = NULL;
+  }
+}
+
+
+/*--------------------------- rt_get_first ----------------------------------*/
+
+P_TCB rt_get_first (P_XCB p_CB) {
+  /* Get task at head of list: it is the task with highest priority. */
+  /* "p_CB" points to head of list. */
+  P_TCB p_first;
+
+  p_first = p_CB->p_lnk;
+  p_CB->p_lnk = p_first->p_lnk;
+  if (p_CB->cb_type == SCB || p_CB->cb_type == MCB || p_CB->cb_type == MUCB) {
+    if (p_first->p_lnk != NULL) {
+      p_first->p_lnk->p_rlnk = (P_TCB)p_CB;
+      p_first->p_lnk = NULL;
+    }
+    p_first->p_rlnk = NULL;
+  }
+  else {
+    p_first->p_lnk = NULL;
+  }
+  return (p_first);
+}
+
+
+/*--------------------------- rt_put_rdy_first ------------------------------*/
+
+void rt_put_rdy_first (P_TCB p_task) {
+  /* Put task identified with "p_task" at the head of the ready list. The   */
+  /* task must have at least a priority equal to highest priority in list.  */
+  p_task->p_lnk = os_rdy.p_lnk;
+  p_task->p_rlnk = NULL;
+  os_rdy.p_lnk = p_task;
+}
+
+
+/*--------------------------- rt_get_same_rdy_prio --------------------------*/
+
+P_TCB rt_get_same_rdy_prio (void) {
+  /* Remove a task of same priority from ready list if any exists. Other-   */
+  /* wise return NULL.                                                      */
+  P_TCB p_first;
+
+  p_first = os_rdy.p_lnk;
+  if (p_first->prio == os_tsk.run->prio) {
+    os_rdy.p_lnk = os_rdy.p_lnk->p_lnk;
+    return (p_first);
+  }
+  return (NULL);
+}
+
+
+/*--------------------------- rt_resort_prio --------------------------------*/
+
+void rt_resort_prio (P_TCB p_task) {
+  /* Re-sort ordered lists after the priority of 'p_task' has changed.      */
+  P_TCB p_CB;
+
+  if (p_task->p_rlnk == NULL) {
+    if (p_task->state == READY) {
+      /* Task is chained into READY list. */
+      p_CB = (P_TCB)&os_rdy;
+      goto res;
+    }
+  }
+  else {
+    p_CB = p_task->p_rlnk;
+    while (p_CB->cb_type == TCB) {
+      /* Find a header of this task chain list. */
+      p_CB = p_CB->p_rlnk;
+    }
+res:rt_rmv_list (p_task);
+    rt_put_prio ((P_XCB)p_CB, p_task);
+  }
+}
+
+
+/*--------------------------- rt_put_dly ------------------------------------*/
+
+void rt_put_dly (P_TCB p_task, U16 delay) {
+  /* Put a task identified with "p_task" into chained delay wait list using */
+  /* a delay value of "delay".                                              */
+  P_TCB p;
+  U32 delta,idelay = delay;
+
+  p = (P_TCB)&os_dly;
+  if (p->p_dlnk == NULL) {
+    /* Delay list empty */
+    delta = 0;
+    goto last;
+  }
+  delta = os_dly.delta_time;
+  while (delta < idelay) {
+    if (p->p_dlnk == NULL) {
+      /* End of list found */
+last: p_task->p_dlnk = NULL;
+      p->p_dlnk = p_task;
+      p_task->p_blnk = p;
+      p->delta_time = (U16)(idelay - delta);
+      p_task->delta_time = 0;
+      return;
+    }
+    p = p->p_dlnk;
+    delta += p->delta_time;
+  }
+  /* Right place found */
+  p_task->p_dlnk = p->p_dlnk;
+  p->p_dlnk = p_task;
+  p_task->p_blnk = p;
+  if (p_task->p_dlnk != NULL) {
+    p_task->p_dlnk->p_blnk = p_task;
+  }
+  p_task->delta_time = (U16)(delta - idelay);
+  p->delta_time -= p_task->delta_time;
+}
+
+
+/*--------------------------- rt_dec_dly ------------------------------------*/
+
+void rt_dec_dly (void) {
+  /* Decrement delta time of list head: remove tasks having a value of zero.*/
+  P_TCB p_rdy;
+
+  if (os_dly.p_dlnk == NULL) {
+    return;
+  }
+  os_dly.delta_time--;
+  while ((os_dly.delta_time == 0) && (os_dly.p_dlnk != NULL)) {
+    p_rdy = os_dly.p_dlnk;
+    if (p_rdy->p_rlnk != NULL) {
+      /* Task is really enqueued, remove task from semaphore/mailbox */
+      /* timeout waiting list. */
+      p_rdy->p_rlnk->p_lnk = p_rdy->p_lnk;
+      if (p_rdy->p_lnk != NULL) {
+        p_rdy->p_lnk->p_rlnk = p_rdy->p_rlnk;
+        p_rdy->p_lnk = NULL;
+      }
+      p_rdy->p_rlnk = NULL;
+    }
+    rt_put_prio (&os_rdy, p_rdy);
+    os_dly.delta_time = p_rdy->delta_time;
+    if (p_rdy->state == WAIT_ITV) {
+      /* Calculate the next time for interval wait. */
+      p_rdy->delta_time = p_rdy->interval_time + (U16)os_time;
+    }
+    p_rdy->state   = READY;
+    os_dly.p_dlnk = p_rdy->p_dlnk;
+    if (p_rdy->p_dlnk != NULL) {
+      p_rdy->p_dlnk->p_blnk =  (P_TCB)&os_dly;
+      p_rdy->p_dlnk = NULL;
+    }
+    p_rdy->p_blnk = NULL;
+  }
+}
+
+
+/*--------------------------- rt_rmv_list -----------------------------------*/
+
+void rt_rmv_list (P_TCB p_task) {
+  /* Remove task identified with "p_task" from ready, semaphore or mailbox  */
+  /* waiting list if enqueued.                                              */
+  P_TCB p_b;
+
+  if (p_task->p_rlnk != NULL) {
+    /* A task is enqueued in semaphore / mailbox waiting list. */
+    p_task->p_rlnk->p_lnk = p_task->p_lnk;
+    if (p_task->p_lnk != NULL) {
+      p_task->p_lnk->p_rlnk = p_task->p_rlnk;
+    }
+    return;
+  }
+
+  p_b = (P_TCB)&os_rdy;
+  while (p_b != NULL) {
+    /* Search the ready list for task "p_task" */
+    if (p_b->p_lnk == p_task) {
+      p_b->p_lnk = p_task->p_lnk;
+      return;
+    }
+    p_b = p_b->p_lnk;
+  }
+}
+
+
+/*--------------------------- rt_rmv_dly ------------------------------------*/
+
+void rt_rmv_dly (P_TCB p_task) {
+  /* Remove task identified with "p_task" from delay list if enqueued.      */
+  P_TCB p_b;
+
+  p_b = p_task->p_blnk;
+  if (p_b != NULL) {
+    /* Task is really enqueued */
+    p_b->p_dlnk = p_task->p_dlnk;
+    if (p_task->p_dlnk != NULL) {
+      /* 'p_task' is in the middle of list */
+      p_b->delta_time += p_task->delta_time;
+      p_task->p_dlnk->p_blnk = p_b;
+      p_task->p_dlnk = NULL;
+    }
+    else {
+      /* 'p_task' is at the end of list */
+      p_b->delta_time = 0;
+    }
+    p_task->p_blnk = NULL;
+  }
+}
+
+
+/*--------------------------- rt_psq_enq ------------------------------------*/
+
+void rt_psq_enq (OS_ID entry, U32 arg) {
+  /* Insert post service request "entry" into ps-queue. */
+  U32 idx;
+
+  idx = rt_inc_qi (os_psq->size, &os_psq->count, &os_psq->first);
+  if (idx < os_psq->size) {
+    os_psq->q[idx].id  = entry;
+    os_psq->q[idx].arg = arg;
+  }
+  else {
+    os_error (OS_ERR_FIFO_OVF);
+  }
+}
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_List.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_List.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,67 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_LIST.H
+ *      Purpose: Functions for the management of different lists
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Definitions */
+
+/* Values for 'cb_type' */
+#define TCB             0
+#define MCB             1
+#define SCB             2
+#define MUCB            3
+#define HCB             4
+
+/* Variables */
+extern struct OS_XCB os_rdy;
+extern struct OS_XCB os_dly;
+
+/* Functions */
+extern void  rt_put_prio      (P_XCB p_CB, P_TCB p_task);
+extern P_TCB rt_get_first     (P_XCB p_CB);
+extern void  rt_put_rdy_first (P_TCB p_task);
+extern P_TCB rt_get_same_rdy_prio (void);
+extern void  rt_resort_prio   (P_TCB p_task);
+extern void  rt_put_dly       (P_TCB p_task, U16 delay);
+extern void  rt_dec_dly       (void);
+extern void  rt_rmv_list      (P_TCB p_task);
+extern void  rt_rmv_dly       (P_TCB p_task);
+extern void  rt_psq_enq       (OS_ID entry, U32 arg);
+
+/* This is a fast macro generating in-line code */
+#define rt_rdy_prio(void) (os_rdy.p_lnk->prio)
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_Mailbox.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_Mailbox.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,292 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MAILBOX.C
+ *      Purpose: Implements waits and wake-ups for mailbox messages
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Conf.h"
+#include "rt_System.h"
+#include "rt_List.h"
+#include "rt_Mailbox.h"
+#include "rt_MemBox.h"
+#include "rt_Task.h"
+#include "rt_HAL_CM.h"
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_mbx_init -----------------------------------*/
+
+void rt_mbx_init (OS_ID mailbox, U16 mbx_size) {
+  /* Initialize a mailbox */
+  P_MCB p_MCB = mailbox;
+
+  p_MCB->cb_type = MCB;
+  p_MCB->state   = 0;
+  p_MCB->isr_st  = 0;
+  p_MCB->p_lnk   = NULL;
+  p_MCB->first   = 0;
+  p_MCB->last    = 0;
+  p_MCB->count   = 0;
+  p_MCB->size    = (mbx_size + sizeof(void *) - sizeof(struct OS_MCB)) /
+                                                     (U32)sizeof (void *);
+}
+
+
+/*--------------------------- rt_mbx_send -----------------------------------*/
+
+OS_RESULT rt_mbx_send (OS_ID mailbox, void *p_msg, U16 timeout) {
+  /* Send message to a mailbox */
+  P_MCB p_MCB = mailbox;
+  P_TCB p_TCB;
+
+  if ((p_MCB->p_lnk != NULL) && (p_MCB->state == 1)) {
+    /* A task is waiting for message */
+    p_TCB = rt_get_first ((P_XCB)p_MCB);
+#ifdef __CMSIS_RTOS
+    rt_ret_val2(p_TCB, 0x10/*osEventMessage*/, (U32)p_msg);
+#else
+    *p_TCB->msg = p_msg;
+    rt_ret_val (p_TCB, OS_R_MBX);
+#endif
+    rt_rmv_dly (p_TCB);
+    rt_dispatch (p_TCB);
+  }
+  else {
+    /* Store message in mailbox queue */
+    if (p_MCB->count == p_MCB->size) {
+      /* No free message entry, wait for one. If message queue is full, */
+      /* then no task is waiting for message. The 'p_MCB->p_lnk' list   */
+      /* pointer can now be reused for send message waits task list.    */
+      if (timeout == 0) {
+        return (OS_R_TMO);
+      }
+      if (p_MCB->p_lnk != NULL) {
+        rt_put_prio ((P_XCB)p_MCB, os_tsk.run);
+      }
+      else {
+        p_MCB->p_lnk = os_tsk.run;
+        os_tsk.run->p_lnk  = NULL;
+        os_tsk.run->p_rlnk = (P_TCB)p_MCB;
+        /* Task is waiting to send a message */
+        p_MCB->state = 2;
+      }
+      os_tsk.run->msg = p_msg;
+      rt_block (timeout, WAIT_MBX);
+      return (OS_R_TMO);
+    }
+    /* Yes, there is a free entry in a mailbox. */
+    p_MCB->msg[p_MCB->first] = p_msg;
+    rt_inc (&p_MCB->count);
+    if (++p_MCB->first == p_MCB->size) {
+      p_MCB->first = 0;
+    }
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_mbx_wait -----------------------------------*/
+
+OS_RESULT rt_mbx_wait (OS_ID mailbox, void **message, U16 timeout) {
+  /* Receive a message; possibly wait for it */
+  P_MCB p_MCB = mailbox;
+  P_TCB p_TCB;
+
+  /* If a message is available in the fifo buffer */
+  /* remove it from the fifo buffer and return. */
+  if (p_MCB->count) {
+    *message = p_MCB->msg[p_MCB->last];
+    if (++p_MCB->last == p_MCB->size) {
+      p_MCB->last = 0;
+    }
+    if ((p_MCB->p_lnk != NULL) && (p_MCB->state == 2)) {
+      /* A task is waiting to send message */
+      p_TCB = rt_get_first ((P_XCB)p_MCB);
+#ifdef __CMSIS_RTOS
+      rt_ret_val(p_TCB, 0/*osOK*/);
+#else
+      rt_ret_val(p_TCB, OS_R_OK);
+#endif
+      p_MCB->msg[p_MCB->first] = p_TCB->msg;
+      if (++p_MCB->first == p_MCB->size) {
+        p_MCB->first = 0;
+      }
+      rt_rmv_dly (p_TCB);
+      rt_dispatch (p_TCB);
+    }
+    else {
+      rt_dec (&p_MCB->count);
+    }
+    return (OS_R_OK);
+  }
+  /* No message available: wait for one */
+  if (timeout == 0) {
+    return (OS_R_TMO);
+  }
+  if (p_MCB->p_lnk != NULL) {
+    rt_put_prio ((P_XCB)p_MCB, os_tsk.run);
+  }
+  else {
+    p_MCB->p_lnk = os_tsk.run;
+    os_tsk.run->p_lnk = NULL;
+    os_tsk.run->p_rlnk = (P_TCB)p_MCB;
+    /* Task is waiting to receive a message */
+    p_MCB->state = 1;
+  }
+  rt_block(timeout, WAIT_MBX);
+#ifndef __CMSIS_RTOS
+  os_tsk.run->msg = message;
+#endif
+  return (OS_R_TMO);
+}
+
+
+/*--------------------------- rt_mbx_check ----------------------------------*/
+
+OS_RESULT rt_mbx_check (OS_ID mailbox) {
+  /* Check for free space in a mailbox. Returns the number of messages     */
+  /* that can be stored to a mailbox. It returns 0 when mailbox is full.   */
+  P_MCB p_MCB = mailbox;
+
+  return (p_MCB->size - p_MCB->count);
+}
+
+
+/*--------------------------- isr_mbx_send ----------------------------------*/
+
+void isr_mbx_send (OS_ID mailbox, void *p_msg) {
+  /* Same function as "os_mbx_send", but to be called by ISRs. */
+  P_MCB p_MCB = mailbox;
+
+  rt_psq_enq (p_MCB, (U32)p_msg);
+  rt_psh_req ();
+}
+
+
+/*--------------------------- isr_mbx_receive -------------------------------*/
+
+OS_RESULT isr_mbx_receive (OS_ID mailbox, void **message) {
+  /* Receive a message in the interrupt function. The interrupt function   */
+  /* should not wait for a message since this would block the rtx os.      */
+  P_MCB p_MCB = mailbox;
+
+  if (p_MCB->count) {
+    /* A message is available in the fifo buffer. */
+    *message = p_MCB->msg[p_MCB->last];
+    if (p_MCB->state == 2) {
+      /* A task is locked waiting to send message */
+      rt_psq_enq (p_MCB, 0);
+      rt_psh_req ();
+    }
+    rt_dec (&p_MCB->count);
+    if (++p_MCB->last == p_MCB->size) {
+      p_MCB->last = 0;
+    }
+    return (OS_R_MBX);
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_mbx_psh ------------------------------------*/
+
+void rt_mbx_psh (P_MCB p_CB, void *p_msg) {
+  /* Store the message to the mailbox queue or pass it to task directly. */
+  P_TCB p_TCB;
+  void *mem;
+
+  if (p_CB->p_lnk != NULL) switch (p_CB->state) {
+#ifdef __CMSIS_RTOS
+    case 3:
+      /* Task is waiting to allocate memory, remove it from the waiting list */
+      mem = rt_alloc_box(p_msg);
+      if (mem == NULL) break;
+      p_TCB = rt_get_first ((P_XCB)p_CB);
+      rt_ret_val(p_TCB, (U32)mem);
+      p_TCB->state = READY;
+      rt_rmv_dly (p_TCB);
+      rt_put_prio (&os_rdy, p_TCB);
+      break;
+#endif
+    case 2:
+      /* Task is waiting to send a message, remove it from the waiting list */
+      p_TCB = rt_get_first ((P_XCB)p_CB);
+#ifdef __CMSIS_RTOS
+      rt_ret_val(p_TCB, 0/*osOK*/);
+#else
+      rt_ret_val(p_TCB, OS_R_OK);
+#endif
+      p_CB->msg[p_CB->first] = p_TCB->msg;
+      rt_inc (&p_CB->count);
+      if (++p_CB->first == p_CB->size) {
+        p_CB->first = 0;
+      }
+      p_TCB->state = READY;
+      rt_rmv_dly (p_TCB);
+      rt_put_prio (&os_rdy, p_TCB);
+      break;
+    case 1:
+      /* Task is waiting for a message, pass the message to the task directly */
+      p_TCB = rt_get_first ((P_XCB)p_CB);
+#ifdef __CMSIS_RTOS
+      rt_ret_val2(p_TCB, 0x10/*osEventMessage*/, (U32)p_msg);
+#else
+      *p_TCB->msg = p_msg;
+      rt_ret_val (p_TCB, OS_R_MBX);
+#endif
+      p_TCB->state = READY;
+      rt_rmv_dly (p_TCB);
+      rt_put_prio (&os_rdy, p_TCB);
+      break;
+  } else {
+      /* No task is waiting for a message, store it to the mailbox queue */
+      if (p_CB->count < p_CB->size) {
+        p_CB->msg[p_CB->first] = p_msg;
+        rt_inc (&p_CB->count);
+        if (++p_CB->first == p_CB->size) {
+          p_CB->first = 0;
+        }
+      }
+      else {
+        os_error (OS_ERR_MBX_OVF);
+      }
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_Mailbox.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_Mailbox.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,48 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MAILBOX.H
+ *      Purpose: Implements waits and wake-ups for mailbox messages
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+extern void      rt_mbx_init  (OS_ID mailbox, U16 mbx_size);
+extern OS_RESULT rt_mbx_send  (OS_ID mailbox, void *p_msg,    U16 timeout);
+extern OS_RESULT rt_mbx_wait  (OS_ID mailbox, void **message, U16 timeout);
+extern OS_RESULT rt_mbx_check (OS_ID mailbox);
+extern void      isr_mbx_send (OS_ID mailbox, void *p_msg);
+extern OS_RESULT isr_mbx_receive (OS_ID mailbox, void **message);
+extern void      rt_mbx_psh   (P_MCB p_CB,    void *p_msg);
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_MemBox.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_MemBox.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,166 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MEMBOX.C
+ *      Purpose: Interface functions for fixed memory block management system
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Conf.h"
+#include "rt_System.h"
+#include "rt_MemBox.h"
+#include "rt_HAL_CM.h"
+
+/*----------------------------------------------------------------------------
+ *      Global Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- _init_box -------------------------------------*/
+
+int _init_box  (void *box_mem, U32 box_size, U32 blk_size) {
+  /* Initialize memory block system, returns 0 if OK, 1 if fails. */
+  void *end;
+  void *blk;
+  void *next;
+  U32  sizeof_bm;
+
+  /* Create memory structure. */
+  if (blk_size & BOX_ALIGN_8) {
+    /* Memory blocks 8-byte aligned. */
+    blk_size = ((blk_size & ~BOX_ALIGN_8) + 7) & ~7;
+    sizeof_bm = (sizeof (struct OS_BM) + 7) & ~7;
+  }
+  else {
+    /* Memory blocks 4-byte aligned. */
+    blk_size = (blk_size + 3) & ~3;
+    sizeof_bm = sizeof (struct OS_BM);
+  }
+  if (blk_size == 0) {
+    return (1);
+  }
+  if ((blk_size + sizeof_bm) > box_size) {
+    return (1);
+  }
+  /* Create a Memory structure. */
+  blk = ((U8 *) box_mem) + sizeof_bm;
+  ((P_BM) box_mem)->free = blk;
+  end = ((U8 *) box_mem) + box_size;
+  ((P_BM) box_mem)->end      = end;
+  ((P_BM) box_mem)->blk_size = blk_size;
+
+  /* Link all free blocks using offsets. */
+  end = ((U8 *) end) - blk_size;
+  while (1)  {
+    next = ((U8 *) blk) + blk_size;
+    if (next > end)  break;
+    *((void **)blk) = next;
+    blk = next;
+  }
+  /* end marker */
+  *((void **)blk) = 0;
+  return (0);
+}
+
+/*--------------------------- rt_alloc_box ----------------------------------*/
+
+void *rt_alloc_box (void *box_mem) {
+  /* Allocate a memory block and return start address. */
+  void **free;
+#ifndef __USE_EXCLUSIVE_ACCESS
+  int  irq_dis;
+
+  irq_dis = __disable_irq ();
+  free = ((P_BM) box_mem)->free;
+  if (free) {
+    ((P_BM) box_mem)->free = *free;
+  }
+  if (!irq_dis) __enable_irq ();
+#else
+  do {
+    if ((free = (void **)__ldrex(&((P_BM) box_mem)->free)) == 0) {
+      __clrex();
+      break;
+    }
+  } while (__strex((U32)*free, &((P_BM) box_mem)->free));
+#endif
+  return (free);
+}
+
+
+/*--------------------------- _calloc_box -----------------------------------*/
+
+void *_calloc_box (void *box_mem)  {
+  /* Allocate a 0-initialized memory block and return start address. */
+  void *free;
+  U32 *p;
+  U32 i;
+
+  free = _alloc_box (box_mem);
+  if (free)  {
+    p = free;
+    for (i = ((P_BM) box_mem)->blk_size; i; i -= 4)  {
+      *p = 0;
+      p++;
+    }
+  }
+  return (free);
+}
+
+
+/*--------------------------- rt_free_box -----------------------------------*/
+
+int rt_free_box (void *box_mem, void *box) {
+  /* Free a memory block, returns 0 if OK, 1 if box does not belong to box_mem */
+#ifndef __USE_EXCLUSIVE_ACCESS
+  int irq_dis;
+#endif
+
+  if (box < box_mem || box >= ((P_BM) box_mem)->end) {
+    return (1);
+  }
+
+#ifndef __USE_EXCLUSIVE_ACCESS
+  irq_dis = __disable_irq ();
+  *((void **)box) = ((P_BM) box_mem)->free;
+  ((P_BM) box_mem)->free = box;
+  if (!irq_dis) __enable_irq ();
+#else
+  do {
+    *((void **)box) = (void *)__ldrex(&((P_BM) box_mem)->free);
+  } while (__strex ((U32)box, &((P_BM) box_mem)->free));
+#endif
+  return (0);
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_MemBox.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_MemBox.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,46 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MEMBOX.H
+ *      Purpose: Interface functions for fixed memory block management system
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+#define rt_init_box     _init_box
+#define rt_calloc_box   _calloc_box
+extern int     _init_box   (void *box_mem, U32 box_size, U32 blk_size);
+extern void *rt_alloc_box  (void *box_mem);
+extern void *  _calloc_box (void *box_mem);
+extern int   rt_free_box   (void *box_mem, void *box);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_Mutex.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_Mutex.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,197 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MUTEX.C
+ *      Purpose: Implements mutex synchronization objects
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Conf.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#include "rt_Mutex.h"
+#include "rt_HAL_CM.h"
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_mut_init -----------------------------------*/
+
+void rt_mut_init (OS_ID mutex) {
+  /* Initialize a mutex object */
+  P_MUCB p_MCB = mutex;
+
+  p_MCB->cb_type = MUCB;
+  p_MCB->prio    = 0;
+  p_MCB->level   = 0;
+  p_MCB->p_lnk   = NULL;
+  p_MCB->owner   = NULL;
+}
+
+
+/*--------------------------- rt_mut_delete ---------------------------------*/
+
+#ifdef __CMSIS_RTOS
+OS_RESULT rt_mut_delete (OS_ID mutex) {
+  /* Delete a mutex object */
+  P_MUCB p_MCB = mutex;
+  P_TCB  p_TCB;
+
+  /* Restore owner task's priority. */
+  if (p_MCB->level != 0) {
+    p_MCB->owner->prio = p_MCB->prio;
+    if (p_MCB->owner != os_tsk.run) {
+      rt_resort_prio (p_MCB->owner);
+    }
+  }
+
+  while (p_MCB->p_lnk != NULL) {
+    /* A task is waiting for mutex. */
+    p_TCB = rt_get_first ((P_XCB)p_MCB);
+    rt_ret_val(p_TCB, 0/*osOK*/);
+    rt_rmv_dly(p_TCB);
+    p_TCB->state = READY;
+    rt_put_prio (&os_rdy, p_TCB);
+  }
+
+  if (os_rdy.p_lnk && (os_rdy.p_lnk->prio > os_tsk.run->prio)) {
+    /* preempt running task */
+    rt_put_prio (&os_rdy, os_tsk.run);
+    os_tsk.run->state = READY;
+    rt_dispatch (NULL);
+  }
+
+  p_MCB->cb_type = 0;
+
+  return (OS_R_OK);
+}
+#endif
+
+
+/*--------------------------- rt_mut_release --------------------------------*/
+
+OS_RESULT rt_mut_release (OS_ID mutex) {
+  /* Release a mutex object */
+  P_MUCB p_MCB = mutex;
+  P_TCB  p_TCB;
+
+  if (p_MCB->level == 0 || p_MCB->owner != os_tsk.run) {
+    /* Unbalanced mutex release or task is not the owner */
+    return (OS_R_NOK);
+  }
+  if (--p_MCB->level != 0) {
+    return (OS_R_OK);
+  }
+  /* Restore owner task's priority. */
+  os_tsk.run->prio = p_MCB->prio;
+  if (p_MCB->p_lnk != NULL) {
+    /* A task is waiting for mutex. */
+    p_TCB = rt_get_first ((P_XCB)p_MCB);
+#ifdef __CMSIS_RTOS
+    rt_ret_val(p_TCB, 0/*osOK*/);
+#else
+    rt_ret_val(p_TCB, OS_R_MUT);
+#endif
+    rt_rmv_dly (p_TCB);
+    /* A waiting task becomes the owner of this mutex. */
+    p_MCB->level     = 1;
+    p_MCB->owner     = p_TCB;
+    p_MCB->prio      = p_TCB->prio;
+    /* Priority inversion, check which task continues. */
+    if (os_tsk.run->prio >= rt_rdy_prio()) {
+      rt_dispatch (p_TCB);
+    }
+    else {
+      /* Ready task has higher priority than running task. */
+      rt_put_prio (&os_rdy, os_tsk.run);
+      rt_put_prio (&os_rdy, p_TCB);
+      os_tsk.run->state = READY;
+      p_TCB->state      = READY;
+      rt_dispatch (NULL);
+    }
+  }
+  else {
+    /* Check if own priority raised by priority inversion. */
+    if (rt_rdy_prio() > os_tsk.run->prio) {
+      rt_put_prio (&os_rdy, os_tsk.run);
+      os_tsk.run->state = READY;
+      rt_dispatch (NULL);
+    }
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_mut_wait -----------------------------------*/
+
+OS_RESULT rt_mut_wait (OS_ID mutex, U16 timeout) {
+  /* Wait for a mutex, continue when mutex is free. */
+  P_MUCB p_MCB = mutex;
+
+  if (p_MCB->level == 0) {
+    p_MCB->owner = os_tsk.run;
+    p_MCB->prio  = os_tsk.run->prio;
+    goto inc;
+  }
+  if (p_MCB->owner == os_tsk.run) {
+    /* OK, running task is the owner of this mutex. */
+inc:p_MCB->level++;
+    return (OS_R_OK);
+  }
+  /* Mutex owned by another task, wait until released. */
+  if (timeout == 0) {
+    return (OS_R_TMO);
+  }
+  /* Raise the owner task priority if lower than current priority. */
+  /* This priority inversion is called priority inheritance.       */
+  if (p_MCB->prio < os_tsk.run->prio) {
+    p_MCB->owner->prio = os_tsk.run->prio;
+    rt_resort_prio (p_MCB->owner);
+  }
+  if (p_MCB->p_lnk != NULL) {
+    rt_put_prio ((P_XCB)p_MCB, os_tsk.run);
+  }
+  else {
+    p_MCB->p_lnk = os_tsk.run;
+    os_tsk.run->p_lnk  = NULL;
+    os_tsk.run->p_rlnk = (P_TCB)p_MCB;
+  }
+  rt_block(timeout, WAIT_MUT);
+  return (OS_R_TMO);
+}
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_Mutex.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_Mutex.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,44 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MUTEX.H
+ *      Purpose: Implements mutex synchronization objects
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+extern void      rt_mut_init    (OS_ID mutex);
+extern OS_RESULT rt_mut_delete  (OS_ID mutex);
+extern OS_RESULT rt_mut_release (OS_ID mutex);
+extern OS_RESULT rt_mut_wait    (OS_ID mutex, U16 timeout);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_Robin.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_Robin.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,84 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_ROBIN.C
+ *      Purpose: Round Robin Task switching
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Conf.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#include "rt_Time.h"
+#include "rt_Robin.h"
+#include "rt_HAL_CM.h"
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+struct OS_ROBIN os_robin;
+
+
+/*----------------------------------------------------------------------------
+ *      Global Functions
+ *---------------------------------------------------------------------------*/
+
+/*--------------------------- rt_init_robin ---------------------------------*/
+
+__weak void rt_init_robin (void) {
+  /* Initialize Round Robin variables. */
+  os_robin.task = NULL;
+  os_robin.tout = (U16)os_rrobin;
+}
+
+/*--------------------------- rt_chk_robin ----------------------------------*/
+
+__weak void rt_chk_robin (void) {
+  /* Check if Round Robin timeout expired and switch to the next ready task.*/
+  P_TCB p_new;
+
+  if (os_robin.task != os_rdy.p_lnk) {
+    /* New task was suspended, reset Round Robin timeout. */
+    os_robin.task = os_rdy.p_lnk;
+    os_robin.time = (U16)os_time + os_robin.tout - 1;
+  }
+  if (os_robin.time == (U16)os_time) {
+    /* Round Robin timeout has expired, swap Robin tasks. */
+    os_robin.task = NULL;
+    p_new = rt_get_first (&os_rdy);
+    rt_put_prio ((P_XCB)&os_rdy, p_new);
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_Robin.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_Robin.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,45 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_ROBIN.H
+ *      Purpose: Round Robin Task switching definitions
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Variables */
+extern struct OS_ROBIN os_robin;
+
+/* Functions */
+extern void rt_init_robin (void);
+extern void rt_chk_robin  (void);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_Semaphore.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_Semaphore.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,183 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_SEMAPHORE.C
+ *      Purpose: Implements binary and counting semaphores
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Conf.h"
+#include "rt_System.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#include "rt_Semaphore.h"
+#include "rt_HAL_CM.h"
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_sem_init -----------------------------------*/
+
+void rt_sem_init (OS_ID semaphore, U16 token_count) {
+  /* Initialize a semaphore */
+  P_SCB p_SCB = semaphore;
+
+  p_SCB->cb_type = SCB;
+  p_SCB->p_lnk  = NULL;
+  p_SCB->tokens = token_count;
+}
+
+
+/*--------------------------- rt_sem_delete ---------------------------------*/
+
+#ifdef __CMSIS_RTOS
+OS_RESULT rt_sem_delete (OS_ID semaphore) {
+  /* Delete semaphore */
+  P_SCB p_SCB = semaphore;
+  P_TCB p_TCB;
+
+  while (p_SCB->p_lnk != NULL) {
+    /* A task is waiting for token */
+    p_TCB = rt_get_first ((P_XCB)p_SCB);
+    rt_ret_val(p_TCB, 0);
+    rt_rmv_dly(p_TCB);
+    p_TCB->state = READY;
+    rt_put_prio (&os_rdy, p_TCB);
+  }
+
+  if (os_rdy.p_lnk && (os_rdy.p_lnk->prio > os_tsk.run->prio)) {
+    /* preempt running task */
+    rt_put_prio (&os_rdy, os_tsk.run);
+    os_tsk.run->state = READY;
+    rt_dispatch (NULL);
+  }
+
+  p_SCB->cb_type = 0;
+
+  return (OS_R_OK);
+}
+#endif
+
+
+/*--------------------------- rt_sem_send -----------------------------------*/
+
+OS_RESULT rt_sem_send (OS_ID semaphore) {
+  /* Return a token to semaphore */
+  P_SCB p_SCB = semaphore;
+  P_TCB p_TCB;
+
+  if (p_SCB->p_lnk != NULL) {
+    /* A task is waiting for token */
+    p_TCB = rt_get_first ((P_XCB)p_SCB);
+#ifdef __CMSIS_RTOS
+    rt_ret_val(p_TCB, 1);
+#else
+    rt_ret_val(p_TCB, OS_R_SEM);
+#endif
+    rt_rmv_dly (p_TCB);
+    rt_dispatch (p_TCB);
+  }
+  else {
+    /* Store token. */
+    p_SCB->tokens++;
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_sem_wait -----------------------------------*/
+
+OS_RESULT rt_sem_wait (OS_ID semaphore, U16 timeout) {
+  /* Obtain a token; possibly wait for it */
+  P_SCB p_SCB = semaphore;
+
+  if (p_SCB->tokens) {
+    p_SCB->tokens--;
+    return (OS_R_OK);
+  }
+  /* No token available: wait for one */
+  if (timeout == 0) {
+    return (OS_R_TMO);
+  }
+  if (p_SCB->p_lnk != NULL) {
+    rt_put_prio ((P_XCB)p_SCB, os_tsk.run);
+  }
+  else {
+    p_SCB->p_lnk = os_tsk.run;
+    os_tsk.run->p_lnk = NULL;
+    os_tsk.run->p_rlnk = (P_TCB)p_SCB;
+  }
+  rt_block(timeout, WAIT_SEM);
+  return (OS_R_TMO);
+}
+
+
+/*--------------------------- isr_sem_send ----------------------------------*/
+
+void isr_sem_send (OS_ID semaphore) {
+  /* Same function as "os_sem"send", but to be called by ISRs */
+  P_SCB p_SCB = semaphore;
+
+  rt_psq_enq (p_SCB, 0);
+  rt_psh_req ();
+}
+
+
+/*--------------------------- rt_sem_psh ------------------------------------*/
+
+void rt_sem_psh (P_SCB p_CB) {
+  /* Check if task has to be waken up */
+  P_TCB p_TCB;
+
+  if (p_CB->p_lnk != NULL) {
+    /* A task is waiting for token */
+    p_TCB = rt_get_first ((P_XCB)p_CB);
+    rt_rmv_dly (p_TCB);
+    p_TCB->state   = READY;
+#ifdef __CMSIS_RTOS
+    rt_ret_val(p_TCB, 1);
+#else
+    rt_ret_val(p_TCB, OS_R_SEM);
+#endif
+    rt_put_prio (&os_rdy, p_TCB);
+  }
+  else {
+    /* Store token */
+    p_CB->tokens++;
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_Semaphore.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_Semaphore.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,46 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_SEMAPHORE.H
+ *      Purpose: Implements binary and counting semaphores
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+extern void      rt_sem_init  (OS_ID semaphore, U16 token_count);
+extern OS_RESULT rt_sem_delete(OS_ID semaphore);
+extern OS_RESULT rt_sem_send  (OS_ID semaphore);
+extern OS_RESULT rt_sem_wait  (OS_ID semaphore, U16 timeout);
+extern void      isr_sem_send (OS_ID semaphore);
+extern void      rt_sem_psh (P_SCB p_CB);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_System.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_System.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,293 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_SYSTEM.C
+ *      Purpose: System Task Manager
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Conf.h"
+#include "rt_Task.h"
+#include "rt_System.h"
+#include "rt_Event.h"
+#include "rt_List.h"
+#include "rt_Mailbox.h"
+#include "rt_Semaphore.h"
+#include "rt_Time.h"
+#include "rt_Robin.h"
+#include "rt_HAL_CM.h"
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+int os_tick_irqn;
+
+/*----------------------------------------------------------------------------
+ *      Local Variables
+ *---------------------------------------------------------------------------*/
+
+static volatile BIT os_lock;
+static volatile BIT os_psh_flag;
+static          U8  pend_flags;
+
+/*----------------------------------------------------------------------------
+ *      Global Functions
+ *---------------------------------------------------------------------------*/
+
+#if defined (__CC_ARM)
+__asm void $$RTX$$version (void) {
+   /* Export a version number symbol for a version control. */
+
+                EXPORT  __RL_RTX_VER
+
+__RL_RTX_VER    EQU     0x450
+}
+#endif
+
+
+/*--------------------------- rt_suspend ------------------------------------*/
+U32 rt_suspend (void) {
+  /* Suspend OS scheduler */
+  U32 delta = 0xFFFF;
+
+  rt_tsk_lock();
+
+  if (os_dly.p_dlnk) {
+    delta = os_dly.delta_time;
+  }
+#ifndef __CMSIS_RTOS
+  if (os_tmr.next) {
+    if (os_tmr.tcnt < delta) delta = os_tmr.tcnt;
+  }
+#endif
+
+  return (delta);
+}
+
+
+/*--------------------------- rt_resume -------------------------------------*/
+void rt_resume (U32 sleep_time) {
+  /* Resume OS scheduler after suspend */
+  P_TCB next;
+  U32   delta;
+
+  os_tsk.run->state = READY;
+  rt_put_rdy_first (os_tsk.run);
+
+  os_robin.task = NULL;
+
+  /* Update delays. */
+  if (os_dly.p_dlnk) {
+    delta = sleep_time;
+    if (delta >= os_dly.delta_time) {
+      delta   -= os_dly.delta_time;
+      os_time += os_dly.delta_time;
+      os_dly.delta_time = 1;
+      while (os_dly.p_dlnk) {
+        rt_dec_dly();
+        if (delta == 0) break;
+        delta--;
+        os_time++;
+      }
+    } else {
+      os_time           += delta;
+      os_dly.delta_time -= delta;
+    }
+  } else {
+    os_time += sleep_time;
+  }
+
+#ifndef __CMSIS_RTOS
+  /* Check the user timers. */
+  if (os_tmr.next) {
+    delta = sleep_time;
+    if (delta >= os_tmr.tcnt) {
+      delta   -= os_tmr.tcnt;
+      os_tmr.tcnt = 1;
+      while (os_tmr.next) {
+        rt_tmr_tick();
+        if (delta == 0) break;
+        delta--;
+      }
+    } else {
+      os_tmr.tcnt -= delta;
+    }
+  }
+#endif
+
+  /* Switch back to highest ready task */
+  next = rt_get_first (&os_rdy);
+  rt_switch_req (next);
+
+  rt_tsk_unlock();
+}
+
+
+/*--------------------------- rt_tsk_lock -----------------------------------*/
+
+void rt_tsk_lock (void) {
+  /* Prevent task switching by locking out scheduler */
+    OS_X_LOCK(os_tick_irqn);
+    os_lock = __TRUE;
+    OS_X_UNPEND (&pend_flags);
+}
+
+
+/*--------------------------- rt_tsk_unlock ---------------------------------*/
+
+void rt_tsk_unlock (void) {
+  /* Unlock scheduler and re-enable task switching */
+    OS_X_UNLOCK(os_tick_irqn);
+    os_lock = __FALSE;
+    OS_X_PEND (pend_flags, os_psh_flag);
+    os_psh_flag = __FALSE;
+}
+
+
+/*--------------------------- rt_psh_req ------------------------------------*/
+
+void rt_psh_req (void) {
+  /* Initiate a post service handling request if required. */
+  if (os_lock == __FALSE) {
+    OS_PEND_IRQ ();
+  }
+  else {
+    os_psh_flag = __TRUE;
+  }
+}
+
+
+/*--------------------------- rt_pop_req ------------------------------------*/
+
+void rt_pop_req (void) {
+  /* Process an ISR post service requests. */
+  struct OS_XCB *p_CB;
+  P_TCB next;
+  U32  idx;
+
+  os_tsk.run->state = READY;
+  rt_put_rdy_first (os_tsk.run);
+
+  idx = os_psq->last;
+  while (os_psq->count) {
+    p_CB = os_psq->q[idx].id;
+    if (p_CB->cb_type == TCB) {
+      /* Is of TCB type */
+      rt_evt_psh ((P_TCB)p_CB, (U16)os_psq->q[idx].arg);
+    }
+    else if (p_CB->cb_type == MCB) {
+      /* Is of MCB type */
+      rt_mbx_psh ((P_MCB)p_CB, (void *)os_psq->q[idx].arg);
+    }
+    else {
+      /* Must be of SCB type */
+      rt_sem_psh ((P_SCB)p_CB);
+    }
+    if (++idx == os_psq->size) idx = 0;
+    rt_dec (&os_psq->count);
+  }
+  os_psq->last = idx;
+
+  next = rt_get_first (&os_rdy);
+  rt_switch_req (next);
+}
+
+
+/*--------------------------- os_tick_init ----------------------------------*/
+
+__weak int os_tick_init (void) {
+  /* Initialize SysTick timer as system tick timer. */
+  rt_systick_init ();
+  return (SYS_TICK_IRQn);  /* Return IRQ number of SysTick timer */
+}
+
+
+/*--------------------------- os_tick_irqack --------------------------------*/
+
+__weak void os_tick_irqack (void) {
+  /* Acknowledge timer interrupt. */
+}
+
+
+/*--------------------------- rt_systick ------------------------------------*/
+
+extern void sysTimerTick(void);
+
+void rt_systick (void) {
+  if(NVIC_Pending(SYS_TICK_IRQn)){
+    rt_pop_req();
+    NVIC_UnpendIRQ(SYS_TICK_IRQn);
+    SYS_TICK_TIMER->IR = 0xF; // clear timer interrupt
+    return;
+  }
+  /* Check for system clock update, suspend running task. */
+  P_TCB next;
+
+  os_tsk.run->state = READY;
+  rt_put_rdy_first (os_tsk.run);
+
+  /* Check Round Robin timeout. */
+  rt_chk_robin ();
+
+  /* Update delays. */
+  os_time++;
+  rt_dec_dly ();
+
+  /* Check the user timers. */
+#ifdef __CMSIS_RTOS
+  sysTimerTick();
+#else
+  rt_tmr_tick ();
+#endif
+
+  /* Switch back to highest ready task */
+  next = rt_get_first (&os_rdy);
+  rt_switch_req (next);
+  SYS_TICK_TIMER->IR = 0xF; // clear timer interrupt
+}
+
+/*--------------------------- rt_stk_check ----------------------------------*/
+__weak void rt_stk_check (void) {
+    /* Check for stack overflow. */
+    if (os_tsk.run->task_id == 0x01) {
+        // TODO: For the main thread the check should be done against the main heap pointer
+    } else {
+        if ((os_tsk.run->tsk_stack < (U32)os_tsk.run->stack) ||
+            (os_tsk.run->stack[0] != MAGIC_WORD)) {
+            os_error (OS_ERR_STK_OVF);
+        }
+    }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_System.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_System.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,52 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_SYSTEM.H
+ *      Purpose: System Task Manager definitions
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Variables */
+#define os_psq  ((P_PSQ)&os_fifo)
+extern int os_tick_irqn;
+
+/* Functions */
+extern U32  rt_suspend    (void);
+extern void rt_resume     (U32 sleep_time);
+extern void rt_tsk_lock   (void);
+extern void rt_tsk_unlock (void);
+extern void rt_psh_req    (void);
+extern void rt_pop_req    (void);
+extern void rt_systick    (void);
+extern void rt_stk_check  (void);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_Task.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_Task.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,341 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TASK.C
+ *      Purpose: Task functions and system start up.
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Conf.h"
+#include "rt_System.h"
+#include "rt_Task.h"
+#include "rt_List.h"
+#include "rt_MemBox.h"
+#include "rt_Robin.h"
+#include "rt_HAL_CM.h"
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+/* Running and next task info. */
+struct OS_TSK os_tsk;
+
+/* Task Control Blocks of idle demon */
+struct OS_TCB os_idle_TCB;
+
+
+/*----------------------------------------------------------------------------
+ *      Local Functions
+ *---------------------------------------------------------------------------*/
+
+OS_TID rt_get_TID (void) {
+  U32 tid;
+
+  for (tid = 1; tid <= os_maxtaskrun; tid++) {
+    if (os_active_TCB[tid-1] == NULL) {
+      return ((OS_TID)tid);
+    }
+  }
+  return (0);
+}
+
+#if defined (__CC_ARM) && !defined (__MICROLIB)
+/*--------------------------- __user_perthread_libspace ---------------------*/
+extern void  *__libspace_start;
+
+void *__user_perthread_libspace (void) {
+  /* Provide a separate libspace for each task. */
+  if (os_tsk.run == NULL) {
+    /* RTX not running yet. */
+    return (&__libspace_start);
+  }
+  return (void *)(os_tsk.run->std_libspace);
+}
+#endif
+
+/*--------------------------- rt_init_context -------------------------------*/
+
+void rt_init_context (P_TCB p_TCB, U8 priority, FUNCP task_body) {
+  /* Initialize general part of the Task Control Block. */
+  p_TCB->cb_type = TCB;
+  p_TCB->state   = READY;
+  p_TCB->prio    = priority;
+  p_TCB->p_lnk   = NULL;
+  p_TCB->p_rlnk  = NULL;
+  p_TCB->p_dlnk  = NULL;
+  p_TCB->p_blnk  = NULL;
+  p_TCB->delta_time    = 0;
+  p_TCB->interval_time = 0;
+  p_TCB->events  = 0;
+  p_TCB->waits   = 0;
+  p_TCB->stack_frame = 0;
+
+  rt_init_stack (p_TCB, task_body);
+}
+
+
+/*--------------------------- rt_switch_req ---------------------------------*/
+
+void rt_switch_req (P_TCB p_new) {
+  /* Switch to next task (identified by "p_new"). */
+  os_tsk.new_tsk   = p_new;
+  p_new->state = RUNNING;
+  DBG_TASK_SWITCH(p_new->task_id);
+}
+
+
+/*--------------------------- rt_dispatch -----------------------------------*/
+
+void rt_dispatch (P_TCB next_TCB) {
+  /* Dispatch next task if any identified or dispatch highest ready task    */
+  /* "next_TCB" identifies a task to run or has value NULL (=no next task)  */
+  if (next_TCB == NULL) {
+    /* Running task was blocked: continue with highest ready task */
+    next_TCB = rt_get_first (&os_rdy);
+    rt_switch_req (next_TCB);
+  }
+  else {
+    /* Check which task continues */
+    if (next_TCB->prio > os_tsk.run->prio) {
+      /* preempt running task */
+      rt_put_rdy_first (os_tsk.run);
+      os_tsk.run->state = READY;
+      rt_switch_req (next_TCB);
+    }
+    else {
+      /* put next task into ready list, no task switch takes place */
+      next_TCB->state = READY;
+      rt_put_prio (&os_rdy, next_TCB);
+    }
+  }
+}
+
+
+/*--------------------------- rt_block --------------------------------------*/
+
+void rt_block (U16 timeout, U8 block_state) {
+  /* Block running task and choose next ready task.                         */
+  /* "timeout" sets a time-out value or is 0xffff (=no time-out).           */
+  /* "block_state" defines the appropriate task state */
+  P_TCB next_TCB;
+
+  if (timeout) {
+    if (timeout < 0xffff) {
+      rt_put_dly (os_tsk.run, timeout);
+    }
+    os_tsk.run->state = block_state;
+    next_TCB = rt_get_first (&os_rdy);
+    rt_switch_req (next_TCB);
+  }
+}
+
+
+/*--------------------------- rt_tsk_pass -----------------------------------*/
+
+void rt_tsk_pass (void) {
+  /* Allow tasks of same priority level to run cooperatively.*/
+  P_TCB p_new;
+
+  p_new = rt_get_same_rdy_prio();
+  if (p_new != NULL) {
+    rt_put_prio ((P_XCB)&os_rdy, os_tsk.run);
+    os_tsk.run->state = READY;
+    rt_switch_req (p_new);
+  }
+}
+
+
+/*--------------------------- rt_tsk_self -----------------------------------*/
+
+OS_TID rt_tsk_self (void) {
+  /* Return own task identifier value. */
+  if (os_tsk.run == NULL) {
+    return (0);
+  }
+  return (os_tsk.run->task_id);
+}
+
+
+/*--------------------------- rt_tsk_prio -----------------------------------*/
+
+OS_RESULT rt_tsk_prio (OS_TID task_id, U8 new_prio) {
+  /* Change execution priority of a task to "new_prio". */
+  P_TCB p_task;
+
+  if (task_id == 0) {
+    /* Change execution priority of calling task. */
+    os_tsk.run->prio = new_prio;
+run:if (rt_rdy_prio() > new_prio) {
+      rt_put_prio (&os_rdy, os_tsk.run);
+      os_tsk.run->state   = READY;
+      rt_dispatch (NULL);
+    }
+    return (OS_R_OK);
+  }
+
+  /* Find the task in the "os_active_TCB" array. */
+  if (task_id > os_maxtaskrun || os_active_TCB[task_id-1] == NULL) {
+    /* Task with "task_id" not found or not started. */
+    return (OS_R_NOK);
+  }
+  p_task = os_active_TCB[task_id-1];
+  p_task->prio = new_prio;
+  if (p_task == os_tsk.run) {
+    goto run;
+  }
+  rt_resort_prio (p_task);
+  if (p_task->state == READY) {
+    /* Task enqueued in a ready list. */
+    p_task = rt_get_first (&os_rdy);
+    rt_dispatch (p_task);
+  }
+  return (OS_R_OK);
+}
+
+/*--------------------------- rt_tsk_delete ---------------------------------*/
+
+OS_RESULT rt_tsk_delete (OS_TID task_id) {
+  /* Terminate the task identified with "task_id". */
+  P_TCB task_context;
+
+  if (task_id == 0 || task_id == os_tsk.run->task_id) {
+    /* Terminate itself. */
+    os_tsk.run->state     = INACTIVE;
+    os_tsk.run->tsk_stack = 0;
+    rt_stk_check ();
+    os_active_TCB[os_tsk.run->task_id-1] = NULL;
+
+    os_tsk.run->stack = NULL;
+    DBG_TASK_NOTIFY(os_tsk.run, __FALSE);
+    os_tsk.run = NULL;
+    rt_dispatch (NULL);
+    /* The program should never come to this point. */
+  }
+  else {
+    /* Find the task in the "os_active_TCB" array. */
+    if (task_id > os_maxtaskrun || os_active_TCB[task_id-1] == NULL) {
+      /* Task with "task_id" not found or not started. */
+      return (OS_R_NOK);
+    }
+    task_context = os_active_TCB[task_id-1];
+    rt_rmv_list (task_context);
+    rt_rmv_dly (task_context);
+    os_active_TCB[task_id-1] = NULL;
+
+    task_context->stack = NULL;
+    DBG_TASK_NOTIFY(task_context, __FALSE);
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_sys_init -----------------------------------*/
+
+#ifdef __CMSIS_RTOS
+void rt_sys_init (void) {
+#else
+void rt_sys_init (FUNCP first_task, U32 prio_stksz, void *stk) {
+#endif
+  /* Initialize system and start up task declared with "first_task". */
+  U32 i;
+
+  DBG_INIT();
+
+  /* Initialize dynamic memory and task TCB pointers to NULL. */
+  for (i = 0; i < os_maxtaskrun; i++) {
+    os_active_TCB[i] = NULL;
+  }
+
+  /* Set up TCB of idle demon */
+  os_idle_TCB.task_id = 255;
+  os_idle_TCB.priv_stack = idle_task_stack_size;
+  os_idle_TCB.stack = idle_task_stack;
+  rt_init_context (&os_idle_TCB, 0, os_idle_demon);
+
+  /* Set up ready list: initially empty */
+  os_rdy.cb_type = HCB;
+  os_rdy.p_lnk   = NULL;
+  /* Set up delay list: initially empty */
+  os_dly.cb_type = HCB;
+  os_dly.p_dlnk  = NULL;
+  os_dly.p_blnk  = NULL;
+  os_dly.delta_time = 0;
+
+  /* Fix SP and systemvariables to assume idle task is running  */
+  /* Transform main program into idle task by assuming idle TCB */
+#ifndef __CMSIS_RTOS
+  rt_set_PSP (os_idle_TCB.tsk_stack);
+#endif
+  os_tsk.run = &os_idle_TCB;
+  os_tsk.run->state = RUNNING;
+
+  /* Initialize ps queue */
+  os_psq->first = 0;
+  os_psq->last  = 0;
+  os_psq->size  = os_fifo_size;
+
+  rt_init_robin ();
+
+  /* Intitialize SVC and PendSV */
+  rt_svc_init ();
+
+#ifndef __CMSIS_RTOS
+  /* Intitialize and start system clock timer */
+  os_tick_irqn = os_tick_init ();
+  if (os_tick_irqn >= 0) {
+    OS_X_INIT(os_tick_irqn);
+  }
+
+  /* Start up first user task before entering the endless loop */
+  rt_tsk_create (first_task, prio_stksz, stk, NULL);
+#endif
+}
+
+
+/*--------------------------- rt_sys_start ----------------------------------*/
+
+#ifdef __CMSIS_RTOS
+void rt_sys_start (void) {
+  /* Start system */
+
+  /* Intitialize and start system clock timer */
+  os_tick_irqn = os_tick_init ();
+  if (os_tick_irqn >= 0) {
+    OS_X_INIT(os_tick_irqn);
+  }
+  extern void RestoreContext();
+  RestoreContext(); // Start the first task
+}
+#endif
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_Task.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_Task.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,73 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TASK.H
+ *      Purpose: Task functions and system start up.
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Definitions */
+#define __CMSIS_RTOS    1
+
+/* Values for 'state'   */
+#define INACTIVE        0
+#define READY           1
+#define RUNNING         2
+#define WAIT_DLY        3
+#define WAIT_ITV        4
+#define WAIT_OR         5
+#define WAIT_AND        6
+#define WAIT_SEM        7
+#define WAIT_MBX        8
+#define WAIT_MUT        9
+
+/* Return codes */
+#define OS_R_TMO        0x01
+#define OS_R_EVT        0x02
+#define OS_R_SEM        0x03
+#define OS_R_MBX        0x04
+#define OS_R_MUT        0x05
+
+#define OS_R_OK         0x00
+#define OS_R_NOK        0xff
+
+/* Variables */
+extern struct OS_TSK os_tsk;
+extern struct OS_TCB os_idle_TCB;
+
+/* Functions */
+extern void      rt_switch_req (P_TCB p_new);
+extern void      rt_dispatch   (P_TCB next_TCB);
+extern void      rt_block      (U16 timeout, U8 block_state);
+extern void      rt_tsk_pass   (void);
+extern OS_TID    rt_tsk_self   (void);
+extern OS_RESULT rt_tsk_prio   (OS_TID task_id, U8 new_prio);
+extern OS_RESULT rt_tsk_delete (OS_TID task_id);
+extern void      rt_sys_init   (void);
+extern void      rt_sys_start  (void);
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_Time.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_Time.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,94 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TIME.C
+ *      Purpose: Delay and interval wait functions
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Conf.h"
+#include "rt_Task.h"
+#include "rt_Time.h"
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+/* Free running system tick counter */
+U32 os_time;
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_time_get -----------------------------------*/
+
+U32 rt_time_get (void) {
+  /* Get system time tick */
+  return (os_time);
+}
+
+
+/*--------------------------- rt_dly_wait -----------------------------------*/
+
+void rt_dly_wait (U16 delay_time) {
+  /* Delay task by "delay_time" */
+  rt_block (delay_time, WAIT_DLY);
+}
+
+
+/*--------------------------- rt_itv_set ------------------------------------*/
+
+void rt_itv_set (U16 interval_time) {
+  /* Set interval length and define start of first interval */
+  os_tsk.run->interval_time = interval_time;
+  os_tsk.run->delta_time = interval_time + (U16)os_time;
+}
+
+
+/*--------------------------- rt_itv_wait -----------------------------------*/
+
+void rt_itv_wait (void) {
+  /* Wait for interval end and define start of next one */
+  U16 delta;
+
+  delta = os_tsk.run->delta_time - (U16)os_time;
+  os_tsk.run->delta_time += os_tsk.run->interval_time;
+  if ((delta & 0x8000) == 0) {
+    rt_block (delta, WAIT_ITV);
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_Time.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_Time.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,47 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TIME.H
+ *      Purpose: Delay and interval wait functions definitions
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Variables */
+extern U32 os_time;
+
+/* Functions */
+extern U32  rt_time_get (void);
+extern void rt_dly_wait (U16 delay_time);
+extern void rt_itv_set  (U16 interval_time);
+extern void rt_itv_wait (void);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_ARM7/rt_TypeDef.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_ARM7/rt_TypeDef.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,128 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TYPEDEF.H
+ *      Purpose: Type Definitions
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+#ifndef RT_TYPE_DEF_H
+#define RT_TYPE_DEF_H
+
+#include "os_tcb.h"
+
+typedef U32     OS_TID;
+typedef void    *OS_ID;
+typedef U32     OS_RESULT;
+
+#define TCB_STACKF      32        /* 'stack_frame' offset                    */
+#define TCB_TSTACK      40        /* 'tsk_stack' offset                      */
+
+typedef struct OS_PSFE {          /* Post Service Fifo Entry                 */
+  void  *id;                      /* Object Identification                   */
+  U32    arg;                     /* Object Argument                         */
+} *P_PSFE;
+
+typedef struct OS_PSQ {           /* Post Service Queue                      */
+  U8     first;                   /* FIFO Head Index                         */
+  U8     last;                    /* FIFO Tail Index                         */
+  U8     count;                   /* Number of stored items in FIFO          */
+  U8     size;                    /* FIFO Size                               */
+  struct OS_PSFE q[1];            /* FIFO Content                            */
+} *P_PSQ;
+
+typedef struct OS_TSK {
+  P_TCB  run;                     /* Current running task                    */
+  P_TCB  new_tsk;                 /* Scheduled task to run                   */
+} *P_TSK;
+
+typedef struct OS_ROBIN {         /* Round Robin Control                     */
+  P_TCB  task;                    /* Round Robin task                        */
+  U16    time;                    /* Round Robin switch time                 */
+  U16    tout;                    /* Round Robin timeout                     */
+} *P_ROBIN;
+
+typedef struct OS_XCB {
+  U8     cb_type;                 /* Control Block Type                      */
+  struct OS_TCB *p_lnk;           /* Link pointer for ready/sem. wait list   */
+  struct OS_TCB *p_rlnk;          /* Link pointer for sem./mbx lst backwards */
+  struct OS_TCB *p_dlnk;          /* Link pointer for delay list             */
+  struct OS_TCB *p_blnk;          /* Link pointer for delay list backwards   */
+  U16    delta_time;              /* Time until time out                     */
+} *P_XCB;
+
+typedef struct OS_MCB {
+  U8     cb_type;                 /* Control Block Type                      */
+  U8     state;                   /* State flag variable                     */
+  U8     isr_st;                  /* State flag variable for isr functions   */
+  struct OS_TCB *p_lnk;           /* Chain of tasks waiting for message      */
+  U16    first;                   /* Index of the message list begin         */
+  U16    last;                    /* Index of the message list end           */
+  U16    count;                   /* Actual number of stored messages        */
+  U16    size;                    /* Maximum number of stored messages       */
+  void   *msg[1];                 /* FIFO for Message pointers 1st element   */
+} *P_MCB;
+
+typedef struct OS_SCB {
+  U8     cb_type;                 /* Control Block Type                      */
+  U8     mask;                    /* Semaphore token mask                    */
+  U16    tokens;                  /* Semaphore tokens                        */
+  struct OS_TCB *p_lnk;           /* Chain of tasks waiting for tokens       */
+} *P_SCB;
+
+typedef struct OS_MUCB {
+  U8     cb_type;                 /* Control Block Type                      */
+  U8     prio;                    /* Owner task default priority             */
+  U16    level;                   /* Call nesting level                      */
+  struct OS_TCB *p_lnk;           /* Chain of tasks waiting for mutex        */
+  struct OS_TCB *owner;           /* Mutex owner task                        */
+} *P_MUCB;
+
+typedef struct OS_XTMR {
+  struct OS_TMR  *next;
+  U16    tcnt;
+} *P_XTMR;
+
+typedef struct OS_TMR {
+  struct OS_TMR  *next;           /* Link pointer to Next timer              */
+  U16    tcnt;                    /* Timer delay count                       */
+  U16    info;                    /* User defined call info                  */
+} *P_TMR;
+
+typedef struct OS_BM {
+  void *free;                     /* Pointer to first free memory block      */
+  void *end;                      /* Pointer to memory block end             */
+  U32  blk_size;                  /* Memory block size                       */
+} *P_BM;
+
+/* Definitions */
+#define __TRUE          1
+#define __FALSE         0
+#define NULL            ((void *) 0)
+
+#endif
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/HAL_CA.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/HAL_CA.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,124 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CA.C
+ *      Purpose: Hardware Abstraction Layer for Cortex-A
+ *      Rev.:
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 2012 ARM Limited
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_HAL_CA.h"
+
+/*--------------------------- os_init_context -------------------------------*/
+
+void rt_init_stack (P_TCB p_TCB, FUNCP task_body) {
+  /* Prepare TCB and saved context for a first time start of a task. */
+  U32 *stk,i,size;
+
+  /* Prepare a complete interrupt frame for first task start */
+  size = p_TCB->priv_stack >> 2;
+  if (size == 0) {
+    size = (U16)os_stackinfo >> 2;
+  }
+  /* Write to the top of stack. */
+  stk = &p_TCB->stack[size];
+
+  /* Auto correct to 8-byte ARM stack alignment. */
+  if ((U32)stk & 0x04) {
+    stk--;
+  }
+
+  stk -= 16;
+
+  /* Initial PC and default CPSR */
+  stk[14] = (U32)task_body;
+  /* Task run mode is inherited from the startup file. */
+  /*  (non-privileged USER or privileged SYSTEM mode)  */
+  stk[15] = (os_flags & 1) ? INIT_CPSR_SYS : INIT_CPSR_USER;
+  /* Set T-bit if task function in Thumb mode. */
+  if ((U32)task_body & 1) {
+    stk[15] |= CPSR_T_BIT;
+  }
+  /* Assign a void pointer to R0. */
+  stk[8]  = (U32)p_TCB->msg;
+  /* Clear R1-R12,LR registers. */
+  for (i = 0; i < 8; i++) {
+    stk[i] = 0;
+  }
+  for (i = 9; i < 14; i++) {
+    stk[i] = 0;
+  }
+
+  /* Initial Task stack pointer. */
+  p_TCB->tsk_stack = (U32)stk;
+
+  /* Task entry point. */
+  p_TCB->ptask = task_body;
+
+  /* Set a magic word for checking of stack overflow. */
+  p_TCB->stack[0] = MAGIC_WORD;
+}
+
+
+/*--------------------------- rt_ret_val ----------------------------------*/
+
+static __inline U32 *rt_ret_regs (P_TCB p_TCB) {
+  /* Get pointer to task return value registers (R0..R3) in Stack */
+  if (p_TCB->stack_frame & 0x4) {
+    /* NEON/D32 Stack Frame: D0-31,FPSCR,Reserved,R4-R11,R0-R3,R12,LR,PC,xPSR */
+    return (U32 *)(p_TCB->tsk_stack + 8*4 + 2*4 + 32*8);
+  } else if (p_TCB->stack_frame & 0x2) {
+    /* VFP/D16 Stack Frame: D0-D15/S0-31,FPSCR,Reserved,R4-R11,R0-R3,R12,LR,PC,xPSR */
+    return (U32 *)(p_TCB->tsk_stack + 8*4 + 2*4 + 32*4);
+  } else {
+    /* Basic Stack Frame: R4-R11,R0-R3,R12,LR,PC,xPSR */
+    return (U32 *)(p_TCB->tsk_stack + 8*4);
+  }
+}
+
+void rt_ret_val (P_TCB p_TCB, U32 v0) {
+  U32 *ret;
+
+  ret = rt_ret_regs(p_TCB);
+  ret[0] = v0;
+}
+
+void rt_ret_val2(P_TCB p_TCB, U32 v0, U32 v1) {
+  U32 *ret;
+
+  ret = rt_ret_regs(p_TCB);
+  ret[0] = v0;
+  ret[1] = v1;
+}
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/RTX_CM_lib.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/RTX_CM_lib.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,563 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RTX_CM_LIB.H
+ *      Purpose: RTX Kernel System Configuration
+ *      Rev.:    V4.73
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#if   defined (__CC_ARM)
+#include <rt_misc.h>
+#pragma O3
+#define __USED __attribute__((used))
+#elif defined (__GNUC__)
+#pragma GCC optimize ("O3")
+#define __USED __attribute__((used))
+#elif defined (__ICCARM__)
+#define __USED __root
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      Definitions
+ *---------------------------------------------------------------------------*/
+
+#define _declare_box(pool,size,cnt)  uint32_t pool[(((size)+3)/4)*(cnt) + 3]
+#define _declare_box8(pool,size,cnt) uint64_t pool[(((size)+7)/8)*(cnt) + 2]
+
+#define OS_TCB_SIZE     64
+#define OS_TMR_SIZE     8
+
+#if defined (__CC_ARM) && !defined (__MICROLIB)
+
+typedef void    *OS_ID;
+typedef uint32_t OS_TID;
+typedef uint32_t OS_MUT[4];
+typedef uint32_t OS_RESULT;
+
+#define runtask_id()    rt_tsk_self()
+#define mutex_init(m)   rt_mut_init(m)
+#define mutex_wait(m)   os_mut_wait(m,0xFFFF)
+#define mutex_rel(m)    os_mut_release(m)
+
+extern OS_TID    rt_tsk_self    (void);
+extern void      rt_mut_init    (OS_ID mutex);
+extern OS_RESULT rt_mut_release (OS_ID mutex);
+extern OS_RESULT rt_mut_wait    (OS_ID mutex, uint16_t timeout);
+
+#define os_mut_wait(mutex,timeout) _os_mut_wait((uint32_t)rt_mut_wait,mutex,timeout)
+#define os_mut_release(mutex)      _os_mut_release((uint32_t)rt_mut_release,mutex)
+
+OS_RESULT _os_mut_release (uint32_t p, OS_ID mutex)                   __svc_indirect(0);
+OS_RESULT _os_mut_wait    (uint32_t p, OS_ID mutex, uint16_t timeout) __svc_indirect(0);
+
+#elif defined (__ICCARM__)
+
+typedef void    *OS_ID;
+typedef uint32_t OS_TID;
+typedef uint32_t OS_MUT[4];
+typedef uint32_t OS_RESULT;
+
+#define runtask_id()    rt_tsk_self()
+#define mutex_init(m)   rt_mut_init(m)
+#define mutex_del(m)    os_mut_delete(m)
+#define mutex_wait(m)   os_mut_wait(m,0xFFFF)
+#define mutex_rel(m)    os_mut_release(m)
+
+extern OS_TID    rt_tsk_self    (void);
+extern void      rt_mut_init    (OS_ID mutex);
+extern OS_RESULT rt_mut_delete  (OS_ID mutex);
+extern OS_RESULT rt_mut_release (OS_ID mutex);
+extern OS_RESULT rt_mut_wait    (OS_ID mutex, uint16_t timeout);
+
+#pragma swi_number=0
+__swi OS_RESULT _os_mut_delete  (OS_ID mutex);
+
+static inline OS_RESULT os_mut_delete(OS_ID mutex)
+{
+    __asm("mov r12,%0\n" :: "r"(&rt_mut_delete) : "r12" );
+    return _os_mut_delete(mutex);
+}
+
+#pragma swi_number=0
+__swi OS_RESULT _os_mut_release (OS_ID mutex);
+
+static inline OS_RESULT os_mut_release(OS_ID mutex)
+{
+    __asm("mov r12,%0\n" :: "r"(&rt_mut_release) : "r12" );
+    return _os_mut_release(mutex);
+}
+
+#pragma swi_number=0
+__swi OS_RESULT _os_mut_wait    (OS_ID mutex, uint16_t timeout);
+
+static inline OS_RESULT os_mut_wait(OS_ID mutex, uint16_t timeout)
+{
+    __asm("mov r12,%0\n" :: "r"(&rt_mut_wait) : "r12" );
+    return _os_mut_wait(mutex, timeout);
+}
+
+#include <yvals.h> /* for include DLib_Thread.h */
+
+void __iar_system_Mtxinit(__iar_Rmtx *);
+void __iar_system_Mtxdst(__iar_Rmtx *);
+void __iar_system_Mtxlock(__iar_Rmtx *);
+void __iar_system_Mtxunlock(__iar_Rmtx *);
+
+
+
+
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+#if (OS_TIMERS != 0)
+#define OS_TASK_CNT (OS_TASKCNT + 1)
+#ifndef __MBED_CMSIS_RTOS_CA9
+#define OS_PRIV_CNT (OS_PRIVCNT + 2)
+#define OS_STACK_SZ (4*(OS_PRIVSTKSIZE+OS_MAINSTKSIZE+OS_TIMERSTKSZ))
+#endif
+#else
+#define OS_TASK_CNT  OS_TASKCNT
+#ifndef __MBED_CMSIS_RTOS_CA9
+#define OS_PRIV_CNT (OS_PRIVCNT + 1)
+#define OS_STACK_SZ (4*(OS_PRIVSTKSIZE+OS_MAINSTKSIZE))
+#endif
+#endif
+
+uint16_t const os_maxtaskrun = OS_TASK_CNT;
+#ifdef __MBED_CMSIS_RTOS_CA9
+uint32_t const os_stackinfo  = (OS_STKCHECK<<24)| (OS_IDLESTKSIZE*4);
+#else
+uint32_t const os_stackinfo  = (OS_STKCHECK<<24)| (OS_PRIV_CNT<<16) | (OS_STKSIZE*4);
+#endif
+uint32_t const os_rrobin     = (OS_ROBIN << 16) | OS_ROBINTOUT;
+uint32_t const os_tickfreq   = OS_CLOCK;
+uint16_t const os_tickus_i   = OS_CLOCK/1000000;
+uint16_t const os_tickus_f   = (((uint64_t)(OS_CLOCK-1000000*(OS_CLOCK/1000000)))<<16)/1000000;
+uint32_t const os_trv        = OS_TRV;
+uint8_t  const os_flags      = OS_RUNPRIV;
+
+/* Export following defines to uVision debugger. */
+__USED uint32_t const CMSIS_RTOS_API_Version = osCMSIS;
+__USED uint32_t const CMSIS_RTOS_RTX_Version = osCMSIS_RTX;
+__USED uint32_t const os_clockrate = OS_TICK;
+__USED uint32_t const os_timernum  = 0;
+
+/* Memory pool for TCB allocation    */
+_declare_box  (mp_tcb, OS_TCB_SIZE, OS_TASK_CNT);
+uint16_t const mp_tcb_size = sizeof(mp_tcb);
+
+#ifdef __MBED_CMSIS_RTOS_CA9
+/* Memory pool for os_idle_demon stack allocation. */
+_declare_box8 (mp_stk, OS_IDLESTKSIZE*4, 1);
+uint32_t const mp_stk_size = sizeof(mp_stk);
+#else
+/* Memory pool for System stack allocation (+os_idle_demon). */
+_declare_box8 (mp_stk, OS_STKSIZE*4, OS_TASK_CNT-OS_PRIV_CNT+1);
+uint32_t const mp_stk_size = sizeof(mp_stk);
+
+/* Memory pool for user specified stack allocation (+main, +timer) */
+uint64_t       os_stack_mem[2+OS_PRIV_CNT+(OS_STACK_SZ/8)];
+uint32_t const os_stack_sz = sizeof(os_stack_mem);
+#endif
+
+#ifndef OS_FIFOSZ
+ #define OS_FIFOSZ      16
+#endif
+
+/* Fifo Queue buffer for ISR requests.*/
+uint32_t       os_fifo[OS_FIFOSZ*2+1];
+uint8_t  const os_fifo_size = OS_FIFOSZ;
+
+/* An array of Active task pointers. */
+void *os_active_TCB[OS_TASK_CNT];
+
+/* User Timers Resources */
+#if (OS_TIMERS != 0)
+extern void osTimerThread (void const *argument);
+#ifdef __MBED_CMSIS_RTOS_CA9
+osThreadDef(osTimerThread, (osPriority)(OS_TIMERPRIO-3), 4*OS_TIMERSTKSZ);
+#else
+osThreadDef(osTimerThread, (osPriority)(OS_TIMERPRIO-3), 1, 4*OS_TIMERSTKSZ);
+#endif
+osThreadId osThreadId_osTimerThread;
+osMessageQDef(osTimerMessageQ, OS_TIMERCBQS, void *);
+osMessageQId osMessageQId_osTimerMessageQ;
+#else
+osThreadDef_t os_thread_def_osTimerThread = { NULL };
+osThreadId osThreadId_osTimerThread;
+osMessageQDef(osTimerMessageQ, 0, void *);
+osMessageQId osMessageQId_osTimerMessageQ;
+#endif
+
+/* Legacy RTX User Timers not used */
+uint32_t       os_tmr = 0;
+uint32_t const *m_tmr = NULL;
+uint16_t const mp_tmr_size = 0;
+
+/* singleton mutex */
+osMutexId singleton_mutex_id;
+osMutexDef(singleton_mutex);
+
+#if defined (__CC_ARM) && !defined (__MICROLIB)
+ /* A memory space for arm standard library. */
+ static uint32_t std_libspace[OS_TASK_CNT][96/4];
+ static OS_MUT   std_libmutex[OS_MUTEXCNT];
+ static uint32_t nr_mutex;
+ extern void  *__libspace_start;
+#elif defined (__ICCARM__)
+typedef struct os_mut_array {
+    OS_MUT   mutex;
+    uint32_t used;
+} os_mut_array_t;
+
+static os_mut_array_t std_libmutex[OS_MUTEXCNT];/* must be Zero clear */
+static uint32_t nr_mutex = 0;
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      RTX Optimizations (empty functions)
+ *---------------------------------------------------------------------------*/
+
+#if OS_ROBIN == 0
+ void rt_init_robin (void) {;}
+ void rt_chk_robin  (void) {;}
+#endif
+
+#if OS_STKCHECK == 0
+ void rt_stk_check  (void) {;}
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      Standard Library multithreading interface
+ *---------------------------------------------------------------------------*/
+
+#if defined (__CC_ARM) && !defined (__MICROLIB)
+
+/*--------------------------- __user_perthread_libspace ---------------------*/
+
+void *__user_perthread_libspace (void) {
+  /* Provide a separate libspace for each task. */
+  uint32_t idx;
+
+  idx = runtask_id ();
+  if (idx == 0) {
+    /* RTX not running yet. */
+    return (&__libspace_start);
+  }
+  return ((void *)&std_libspace[idx-1]);
+}
+
+/*--------------------------- _mutex_initialize -----------------------------*/
+
+int _mutex_initialize (OS_ID *mutex) {
+  /* Allocate and initialize a system mutex. */
+
+  if (nr_mutex >= OS_MUTEXCNT) {
+    /* If you are here, you need to increase the number OS_MUTEXCNT. */
+    for (;;);
+  }
+  *mutex = &std_libmutex[nr_mutex++];
+  mutex_init (*mutex);
+  return (1);
+}
+
+
+/*--------------------------- _mutex_acquire --------------------------------*/
+
+__attribute__((used)) void _mutex_acquire (OS_ID *mutex) {
+  /* Acquire a system mutex, lock stdlib resources. */
+  if (runtask_id ()) {
+    /* RTX running, acquire a mutex. */
+    mutex_wait (*mutex);
+  }
+}
+
+
+/*--------------------------- _mutex_release --------------------------------*/
+
+__attribute__((used)) void _mutex_release (OS_ID *mutex) {
+  /* Release a system mutex, unlock stdlib resources. */
+  if (runtask_id ()) {
+    /* RTX running, release a mutex. */
+    mutex_rel (*mutex);
+  }
+}
+
+#elif defined (__ICCARM__)
+
+/*--------------------------- __iar_system_Mtxinit --------------------------*/
+
+void __iar_system_Mtxinit(__iar_Rmtx *mutex)
+{
+    /* Allocate and initialize a system mutex. */
+    int32_t idx;
+
+    for (idx = 0; idx < OS_MUTEXCNT; idx++)
+    {
+        if (std_libmutex[idx].used == 0)
+        {
+            std_libmutex[idx].used = 1;
+            *mutex = &std_libmutex[idx].mutex;
+            nr_mutex++;
+            break;
+        }
+    }
+    if (nr_mutex >= OS_MUTEXCNT)
+    {
+        /* If you are here, you need to increase the number OS_MUTEXCNT. */
+        for (;;);
+    }
+  
+    mutex_init (*mutex);
+}
+
+/*--------------------------- __iar_system_Mtxdst ---------------------------*/
+
+void __iar_system_Mtxdst(__iar_Rmtx *mutex)
+{
+    /* Free a system mutex. */
+    int32_t idx;
+
+    if (nr_mutex == 0)
+    {
+        for (;;);
+    }
+
+    idx = ((((uint32_t)mutex) - ((uint32_t)&std_libmutex[0].mutex))
+           / sizeof(os_mut_array_t));
+
+    if (idx >= OS_MUTEXCNT)
+    {
+        for (;;);
+    }
+
+    mutex_del (*mutex);
+    std_libmutex[idx].used = 0;
+}
+
+/*--------------------------- __iar_system_Mtxlock --------------------------*/
+
+void __iar_system_Mtxlock(__iar_Rmtx *mutex)
+{
+    /* Acquire a system mutex, lock stdlib resources. */
+    if (runtask_id ())
+    {
+        /* RTX running, acquire a mutex. */
+        mutex_wait (*mutex);
+    }
+}
+
+/*--------------------------- __iar_system_Mtxunlock ------------------------*/
+
+void __iar_system_Mtxunlock(__iar_Rmtx *mutex)
+{
+    /* Release a system mutex, unlock stdlib resources. */
+    if (runtask_id ())
+    {
+        /* RTX running, release a mutex. */
+        mutex_rel (*mutex);
+    }
+}
+
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      RTX Startup
+ *---------------------------------------------------------------------------*/
+
+/* Main Thread definition */
+extern void pre_main (void);
+#ifdef __MBED_CMSIS_RTOS_CA9
+uint32_t os_thread_def_stack_main [(4 * OS_MAINSTKSIZE) / sizeof(uint32_t)];
+osThreadDef_t os_thread_def_main = {(os_pthread)pre_main, osPriorityNormal, 1, 4*OS_MAINSTKSIZE, os_thread_def_stack_main };
+#else
+osThreadDef_t os_thread_def_main = {(os_pthread)pre_main, osPriorityNormal, 1, 4*OS_MAINSTKSIZE };
+#endif
+
+#if defined (__CC_ARM)
+
+#ifdef __MICROLIB
+
+int main(void);
+void _main_init (void) __attribute__((section(".ARM.Collect$$$$000000FF")));
+void $Super$$__cpp_initialize__aeabi_(void);
+
+#if __TARGET_ARCH_ARM
+#pragma push
+#pragma arm
+#endif
+void _main_init (void) {
+  osKernelInitialize();
+  osThreadCreate(&os_thread_def_main, NULL);
+  osKernelStart();
+  for (;;);
+}
+#if __TARGET_ARCH_ARM
+#pragma pop
+#endif
+
+void $Sub$$__cpp_initialize__aeabi_(void)  
+{  
+  // this should invoke C++ initializers prior _main_init, we keep this empty and  
+  // invoke them after _main_init (=starts RTX kernel)  
+}  
+
+void pre_main()  
+{  
+  singleton_mutex_id = osMutexCreate(osMutex(singleton_mutex));
+  $Super$$__cpp_initialize__aeabi_();  
+  main();  
+}
+
+#else
+
+void * armcc_heap_base;
+void * armcc_heap_top;
+
+int main(void);
+
+void pre_main (void)
+{
+    singleton_mutex_id = osMutexCreate(osMutex(singleton_mutex));
+    __rt_lib_init((unsigned)armcc_heap_base, (unsigned)armcc_heap_top);
+    main();
+}
+
+__asm void __rt_entry (void) {
+
+  IMPORT  __user_setup_stackheap
+  IMPORT  os_thread_def_main
+  IMPORT  armcc_heap_base
+  IMPORT  armcc_heap_top
+  IMPORT  osKernelInitialize
+  IMPORT  osKernelStart
+  IMPORT  osThreadCreate
+
+  BL      __user_setup_stackheap
+  LDR     R3,=armcc_heap_base
+  LDR     R4,=armcc_heap_top
+  STR     R0,[R3]
+  STR     R2,[R4]
+  BL      osKernelInitialize
+  LDR     R0,=os_thread_def_main
+  MOVS    R1,#0
+  BL      osThreadCreate
+  BL      osKernelStart
+  /* osKernelStart should not return */
+  B       .
+
+  ALIGN
+}
+#endif
+
+#elif defined (__GNUC__)
+extern int atexit(void (*func)(void));
+extern void __libc_fini_array(void);
+extern void __libc_init_array (void);
+extern int main(int argc, char **argv);
+
+void pre_main(void) {
+    singleton_mutex_id = osMutexCreate(osMutex(singleton_mutex));
+    atexit(__libc_fini_array);
+    __libc_init_array();
+    main(0, NULL);
+}
+
+__attribute__((naked)) void software_init_hook_rtos (void) {
+  __asm (
+    ".syntax unified\n"
+    ".arm\n"
+    "bl   osKernelInitialize\n"
+    "ldr  r0,=os_thread_def_main\n"
+    "movs r1,#0\n"
+    "bl   osThreadCreate\n"
+    "bl   osKernelStart\n"
+    /* osKernelStart should not return */ 
+    "B       .\n"
+  );
+}
+
+#elif defined (__ICCARM__)
+extern void* __vector_core_a9;
+extern int  __low_level_init(void);
+extern void __iar_data_init3(void);
+extern __weak void __iar_init_core( void );
+extern __weak void __iar_init_vfp( void );
+extern void __iar_dynamic_initialization(void);
+extern void mbed_sdk_init(void);
+extern void mbed_main(void);
+extern int main(void);
+static uint8_t low_level_init_needed;
+
+void pre_main(void) {
+    singleton_mutex_id = osMutexCreate(osMutex(singleton_mutex));
+    if (low_level_init_needed) {
+        __iar_dynamic_initialization();
+    }
+    mbed_main();
+    main();
+}
+
+#pragma required=__vector_core_a9
+void __iar_program_start( void )
+{
+  __iar_init_core();
+  __iar_init_vfp();
+  
+  uint8_t low_level_init_needed_local;
+  
+  low_level_init_needed_local = __low_level_init();
+  if (low_level_init_needed_local) {
+     __iar_data_init3();
+     mbed_sdk_init();
+   }
+  /* Store in a global variable after RAM has been initialized */
+  low_level_init_needed = low_level_init_needed_local;
+  osKernelInitialize();
+  osThreadCreate(&os_thread_def_main, NULL);
+  osKernelStart();
+  /* osKernelStart should not return */
+  while (1);
+}
+
+#endif
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/RTX_Conf_CA.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/RTX_Conf_CA.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,334 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RTX_Conf_CM.C
+ *      Purpose: Configuration of CMSIS RTX Kernel
+ *      Rev.:    V4.60
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "cmsis_os.h"
+
+/*----------------------------------------------------------------------------
+ *      RTX User configuration part BEGIN
+ *---------------------------------------------------------------------------*/
+
+// Include per-target RTX config file
+#include "mbed_rtx4.h"
+
+//-------- <<< Use Configuration Wizard in Context Menu >>> -----------------
+//
+// <h>Thread Configuration
+// =======================
+//
+//   <o>Number of concurrent running threads <0-250>
+//   <i> Defines max. number of threads that will run at the same time.
+//   <i> Default: 6
+#ifndef OS_TASKCNT
+ #define OS_TASKCNT     25
+#endif
+
+#ifdef __MBED_CMSIS_RTOS_CA9
+//   <o>Idle stack size [bytes] <64-4096:8><#/4>
+//   <i> Defines default stack size for the Idle thread.
+#ifndef OS_IDLESTKSIZE
+ #define OS_IDLESTKSIZE 128
+#endif
+#else // __MBED_CMSIS_RTOS_CA9
+//   <o>Default Thread stack size [bytes] <64-4096:8><#/4>
+//   <i> Defines default stack size for threads with osThreadDef stacksz = 0
+//   <i> Default: 200
+#ifndef OS_STKSIZE
+ #define OS_STKSIZE     200
+#endif
+#endif // __MBED_CMSIS_RTOS_CA9
+
+//   <o>Main Thread stack size [bytes] <64-4096:8><#/4>
+//   <i> Defines stack size for main thread.
+//   <i> Default: 4096
+#ifndef OS_MAINSTKSIZE
+ #define OS_MAINSTKSIZE 4096
+#endif
+
+#ifndef __MBED_CMSIS_RTOS_CA9
+//   <o>Number of threads with user-provided stack size <0-250>
+//   <i> Defines the number of threads with user-provided stack size.
+//   <i> Default: 0
+#ifndef OS_PRIVCNT
+ #define OS_PRIVCNT     0
+#endif
+
+//   <o>Total stack size [bytes] for threads with user-provided stack size <0-4096:8><#/4>
+//   <i> Defines the combined stack size for threads with user-provided stack size.
+//   <i> Default: 0
+#ifndef OS_PRIVSTKSIZE
+ #define OS_PRIVSTKSIZE 0
+#endif
+#endif // __MBED_CMSIS_RTOS_CA9
+
+// <q>Check for stack overflow
+// <i> Includes the stack checking code for stack overflow.
+// <i> Note that additional code reduces the Kernel performance.
+#ifndef OS_STKCHECK
+ #define OS_STKCHECK    1
+#endif
+
+// <o>Processor mode for thread execution
+//   <0=> Unprivileged mode
+//   <1=> Privileged mode
+// <i> Default: Privileged mode
+#ifndef OS_RUNPRIV
+ #define OS_RUNPRIV     1
+#endif
+
+// </h>
+
+// <h>RTX Kernel Timer Tick Configuration
+// ======================================
+// <q> Use Cortex-M SysTick timer as RTX Kernel Timer
+// <i> Use the Cortex-M SysTick timer as a time-base for RTX.
+#ifndef OS_SYSTICK
+ #define OS_SYSTICK     0
+#endif
+//
+//   <o>Timer clock value [Hz] <1-1000000000>
+//   <i> Defines the timer clock value.
+//   <i> Default: 12000000  (12MHz)
+#ifndef OS_CLOCK
+ #error "no target defined"
+#endif
+
+//   <o>Timer tick value [us] <1-1000000>
+//   <i> Defines the timer tick value.
+//   <i> Default: 1000  (1ms)
+#ifndef OS_TICK
+ #define OS_TICK        1000
+#endif
+
+// </h>
+
+// <h>System Configuration
+// =======================
+//
+// <e>Round-Robin Thread switching
+// ===============================
+//
+// <i> Enables Round-Robin Thread switching.
+#ifndef OS_ROBIN
+ #define OS_ROBIN       1
+#endif
+
+//   <o>Round-Robin Timeout [ticks] <1-1000>
+//   <i> Defines how long a thread will execute before a thread switch.
+//   <i> Default: 5
+#ifndef OS_ROBINTOUT
+ #define OS_ROBINTOUT   5
+#endif
+
+// </e>
+
+// <e>User Timers
+// ==============
+//   <i> Enables user Timers
+#ifndef OS_TIMERS
+ #define OS_TIMERS      1
+#endif
+
+//   <o>Timer Thread Priority
+//                        <1=> Low
+//     <2=> Below Normal  <3=> Normal  <4=> Above Normal
+//                        <5=> High
+//                        <6=> Realtime (highest)
+//   <i> Defines priority for Timer Thread
+//   <i> Default: High
+#ifndef OS_TIMERPRIO
+ #define OS_TIMERPRIO   5
+#endif
+
+//   <o>Timer Thread stack size [bytes] <64-4096:8><#/4>
+//   <i> Defines stack size for Timer thread.
+//   <i> Default: 200
+#ifndef OS_TIMERSTKSZ
+ #define OS_TIMERSTKSZ  WORDS_STACK_SIZE
+#endif
+
+//   <o>Timer Callback Queue size <1-32>
+//   <i> Number of concurrent active timer callback functions.
+//   <i> Default: 4
+#ifndef OS_TIMERCBQS
+ #define OS_TIMERCBQS   4
+#endif
+
+// </e>
+
+//   <o>ISR FIFO Queue size<4=>   4 entries  <8=>   8 entries
+//                         <12=> 12 entries  <16=> 16 entries
+//                         <24=> 24 entries  <32=> 32 entries
+//                         <48=> 48 entries  <64=> 64 entries
+//                         <96=> 96 entries
+//   <i> ISR functions store requests to this buffer,
+//   <i> when they are called from the interrupt handler.
+//   <i> Default: 16 entries
+#ifndef OS_FIFOSZ
+ #define OS_FIFOSZ      16
+#endif
+
+// </h>
+
+//------------- <<< end of configuration section >>> -----------------------
+
+// Standard library system mutexes
+// ===============================
+//  Define max. number system mutexes that are used to protect
+//  the arm standard runtime library. For microlib they are not used.
+#ifndef OS_MUTEXCNT
+ #define OS_MUTEXCNT    12
+#endif
+
+/*----------------------------------------------------------------------------
+ *      RTX User configuration part END
+ *---------------------------------------------------------------------------*/
+
+#define OS_TRV          ((uint32_t)(((double)OS_CLOCK*(double)OS_TICK)/1E6)-1)
+
+
+/*----------------------------------------------------------------------------
+ *      Global Functions
+ *---------------------------------------------------------------------------*/
+
+/*--------------------------- os_idle_demon ---------------------------------*/
+extern void rtos_idle_loop(void);
+
+void os_idle_demon (void) {
+  /* The idle demon is a system thread, running when no other thread is      */
+  /* ready to run.                                                           */
+  rtos_idle_loop();
+}
+
+#if (OS_SYSTICK == 0)   // Functions for alternative timer as RTX kernel timer
+
+/*--------------------------- os_tick_init ----------------------------------*/
+#if defined(TARGET_RZ_A1H) || defined(TARGET_VK_RZ_A1H)
+#define OSTM0   (0xFCFEC000uL) /* OSTM0 */
+#define OSTM1   (0xFCFEC400uL) /* OSTM1 */
+#define CPG     (0xFCFE0410uL) /* CPG */
+
+#define CPGSTBCR5 (*((volatile unsigned char*)(CPG    + 0x00000018uL)))
+
+#define OSTM0CMP (*((volatile unsigned long*)(OSTM0   + 0x00000000uL)))
+#define OSTM0CNT (*((volatile unsigned long*)(OSTM0   + 0x00000004uL)))
+#define OSTM0TE  (*((volatile unsigned char*)(OSTM0   + 0x00000010uL)))
+#define OSTM0TS  (*((volatile unsigned char*)(OSTM0   + 0x00000014uL)))
+#define OSTM0TT  (*((volatile unsigned char*)(OSTM0   + 0x00000018uL)))
+#define OSTM0CTL (*((volatile unsigned char*)(OSTM0   + 0x00000020uL)))
+
+#define OSTM1CMP (*((volatile unsigned long*)(OSTM1   + 0x00000000uL)))
+#define OSTM1CNT (*((volatile unsigned long*)(OSTM1   + 0x00000004uL)))
+#define OSTM1TE  (*((volatile unsigned char*)(OSTM1   + 0x00000010uL)))
+#define OSTM1TS  (*((volatile unsigned char*)(OSTM1   + 0x00000014uL)))
+#define OSTM1TT  (*((volatile unsigned char*)(OSTM1   + 0x00000018uL)))
+#define OSTM1CTL (*((volatile unsigned char*)(OSTM1   + 0x00000020uL)))
+
+#define CPG_STBCR5_BIT_MSTP51   (0x02u) /* OSTM0 */
+#define CM1_RENESAS_RZ_A1_P0_CLK ( 32000000u)
+#define CM0_RENESAS_RZ_A1_P0_CLK ( 33333333u)
+
+typedef enum
+{
+    IRQ_SGI0       = 0,
+    IRQ_OSTMI0TINT = 134
+} IRQn_Type;
+
+typedef void(*IRQHandler)();
+
+extern void PendSV_Handler(uint32_t);
+extern void OS_Tick_Handler(uint32_t);
+extern uint32_t InterruptHandlerRegister (IRQn_Type irq, IRQHandler handler);
+#endif
+
+// Initialize alternative hardware timer as RTX kernel timer
+// Return: IRQ number of the alternative hardware timer
+int os_tick_init (void) {
+#if defined(TARGET_RZ_A1H) || defined(TARGET_VK_RZ_A1H)
+  CPGSTBCR5 &= ~(CPG_STBCR5_BIT_MSTP51); /* enable OSTM0 clock */
+
+  OSTM0TT   = 0x1;    /* Stop the counter and clears the OSTM0TE bit.     */
+  OSTM0CTL  = 0x1;    /* Interval timer mode. Interrupt enabled  */
+
+  OSTM0CMP  = (uint32_t)(((double)CM0_RENESAS_RZ_A1_P0_CLK*(double)OS_TICK)/1E6);
+
+  OSTM0TS   = 0x1;    /* Start the counter and sets the OSTM0TE bit.     */
+
+  InterruptHandlerRegister(IRQ_SGI0    , (IRQHandler)PendSV_Handler);
+  InterruptHandlerRegister(IRQ_OSTMI0TINT, (IRQHandler)OS_Tick_Handler);
+
+
+  return IRQ_OSTMI0TINT; /* Return IRQ number of timer (0..239) */
+              /* RTX will set and configure the interrupt */
+#endif
+}
+
+/*--------------------------- os_tick_irqack --------------------------------*/
+
+// Acknowledge alternative hardware timer interrupt
+void os_tick_irqack (void) {
+  /* ... */
+}
+
+#endif   // (OS_SYSTICK == 0)
+
+/*--------------------------- os_error --------------------------------------*/
+extern void mbed_die(void);
+
+void os_error (uint32_t err_code) {
+  /* This function is called when a runtime error is detected. Parameter */
+  /* 'err_code' holds the runtime error code (defined in RTL.H).         */
+    mbed_die();
+
+  /* HERE: include optional code to be executed on runtime error. */
+  for (;;);
+}
+
+/*----------------------------------------------------------------------------
+ *      RTX Hooks
+ *---------------------------------------------------------------------------*/
+extern void thread_terminate_hook(osThreadId id);
+
+void sysThreadTerminate(osThreadId id) {
+    thread_terminate_hook(id);
+}
+
+/*----------------------------------------------------------------------------
+ *      RTX Configuration Functions
+ *---------------------------------------------------------------------------*/
+
+#include "RTX_CM_lib.h"
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/RTX_Config.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/RTX_Config.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,78 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RTX_CONFIG.H
+ *      Purpose: Exported functions of RTX_Config.c
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+
+/* Error Codes */
+#define OS_ERR_STK_OVF          1
+#define OS_ERR_FIFO_OVF         2
+#define OS_ERR_MBX_OVF          3
+
+/* Definitions */
+#define BOX_ALIGN_8                   0x80000000
+#define _declare_box(pool,size,cnt)   U32 pool[(((size)+3)/4)*(cnt) + 3]
+#define _declare_box8(pool,size,cnt)  U64 pool[(((size)+7)/8)*(cnt) + 2]
+#define _init_box8(pool,size,bsize)   _init_box (pool,size,(bsize) | BOX_ALIGN_8)
+
+/* Variables */
+extern U32 mp_tcb[];
+extern U64 mp_stk[];
+extern U32 os_fifo[];
+extern void *os_active_TCB[];
+
+/* Constants */
+extern U16 const os_maxtaskrun;
+extern U32 const os_trv;
+extern U8  const os_flags;
+extern U32 const os_stackinfo;
+extern U32 const os_rrobin;
+extern U32 const os_clockrate;
+extern U32 const os_timernum;
+extern U16 const mp_tcb_size;
+extern U32 const mp_stk_size;
+extern U32 const *m_tmr;
+extern U16 const mp_tmr_size;
+extern U8  const os_fifo_size;
+
+/* Functions */
+extern void os_idle_demon   (void);
+extern int  os_tick_init    (void);
+extern U32  os_tick_val     (void);
+extern U32  os_tick_ovf     (void);
+extern void os_tick_irqack  (void);
+extern void os_tmr_call     (U16  info);
+extern void os_error        (U32 err_code);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/TOOLCHAIN_ARM/HAL_CA9.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/TOOLCHAIN_ARM/HAL_CA9.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,437 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CA9.c
+ *      Purpose: Hardware Abstraction Layer for Cortex-A9
+ *      Rev.:    8 April 2015
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 2012 - 2015 ARM Limited
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_Task.h"
+#include "rt_List.h"
+#include "rt_MemBox.h"
+#include "rt_HAL_CA.h"
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+//For A-class, set USR/SYS stack
+__asm void rt_set_PSP (U32 stack) {
+        ARM
+
+        MRS     R1, CPSR
+        CPS     #MODE_SYS   ;no effect in USR mode
+        ISB
+        MOV     SP, R0
+        MSR     CPSR_c, R1  ;no effect in USR mode
+        ISB
+        BX      LR
+
+}
+
+//For A-class, get USR/SYS stack
+__asm U32 rt_get_PSP (void) {
+        ARM
+
+        MRS     R1, CPSR
+        CPS     #MODE_SYS   ;no effect in USR mode
+        ISB
+        MOV     R0, SP
+        MSR     CPSR_c, R1  ;no effect in USR mode
+        ISB
+        BX      LR
+}
+
+/*--------------------------- _alloc_box ------------------------------------*/
+__asm void *_alloc_box (void *box_mem) {
+    /* Function wrapper for Unprivileged/Privileged mode. */
+        ARM
+
+        LDR     R12,=__cpp(rt_alloc_box)
+        MRS     R2, CPSR
+        LSLS    R2, #28
+        BXNE    R12
+        SVC     0
+        BX      LR
+}
+
+
+/*--------------------------- _free_box -------------------------------------*/
+__asm int _free_box (void *box_mem, void *box) {
+   /* Function wrapper for Unprivileged/Privileged mode. */
+        ARM
+
+        LDR     R12,=__cpp(rt_free_box)
+        MRS     R2, CPSR
+        LSLS    R2, #28
+        BXNE    R12
+        SVC     0
+        BX      LR
+
+}
+
+/*-------------------------- SVC_Handler -----------------------------------*/
+
+#pragma push
+#pragma arm
+__asm void SVC_Handler (void) {
+        PRESERVE8
+        ARM
+
+        IMPORT  rt_tsk_lock
+        IMPORT  rt_tsk_unlock
+        IMPORT  SVC_Count
+        IMPORT  SVC_Table
+        IMPORT  rt_stk_check
+        IMPORT  FPUEnable
+        IMPORT  scheduler_suspended    ; flag set by rt_suspend, cleared by rt_resume, read by SVC_Handler
+
+Mode_SVC        EQU     0x13
+
+        SRSFD   SP!, #Mode_SVC         ; Push LR_SVC and SPRS_SVC onto SVC mode stack
+        PUSH    {R4}                   ; Push R4 so we can use it as a temp
+
+        MRS     R4,SPSR                ; Get SPSR
+        TST     R4,#CPSR_T_BIT         ; Check Thumb Bit
+        LDRNEH  R4,[LR,#-2]            ; Thumb: Load Halfword
+        BICNE   R4,R4,#0xFF00          ;        Extract SVC Number
+        LDREQ   R4,[LR,#-4]            ; ARM:   Load Word
+        BICEQ   R4,R4,#0xFF000000      ;        Extract SVC Number
+
+        /* Lock out systick and re-enable interrupts */
+        PUSH    {R0-R3,R12,LR}
+
+        AND     R12, SP, #4            ; Ensure stack is 8-byte aligned
+        SUB     SP, SP, R12            ; Adjust stack
+        PUSH    {R12, LR}              ; Store stack adjustment and dummy LR to SVC stack
+
+        BLX     rt_tsk_lock
+        CPSIE   i
+
+        POP     {R12, LR}              ; Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R12            ; Unadjust stack
+
+        POP     {R0-R3,R12,LR}
+
+        CMP     R4,#0
+        BNE     SVC_User
+
+        MRS     R4,SPSR
+        PUSH    {R4}                    ; Push R4 so we can use it as a temp
+        AND     R4, SP, #4              ; Ensure stack is 8-byte aligned
+        SUB     SP, SP, R4              ; Adjust stack
+        PUSH    {R4, LR}                ; Store stack adjustment and dummy LR
+        BLX     R12
+        POP     {R4, LR}                ; Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R4              ; Unadjust stack
+        POP     {R4}                    ; Restore R4
+        MSR     SPSR_CXSF,R4
+
+        /* Here we will be in SVC mode (even if coming in from PendSV_Handler or OS_Tick_Handler) */
+Sys_Switch
+        LDR     LR,=__cpp(&os_tsk)
+        LDM     LR,{R4,LR}              ; os_tsk.run, os_tsk.new_tsk
+        CMP     R4,LR
+        BNE     switching
+
+        PUSH    {R0-R3,R12,LR}
+
+        AND     R12, SP, #4             ; Ensure stack is 8-byte aligned
+        SUB     SP, SP, R12             ; Adjust stack
+        PUSH    {R12, LR}               ; Store stack adjustment and dummy LR to SVC stack
+
+        CPSID   i
+        ; Do not unlock scheduler if it has just been suspended by rt_suspend()
+        LDR     R1,=scheduler_suspended
+        LDRB    R0, [R1]
+        CMP     R0, #1
+        BEQ     dont_unlock
+        BLX     rt_tsk_unlock
+dont_unlock
+
+        POP     {R12, LR}               ; Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R12             ; Unadjust stack
+
+        POP     {R0-R3,R12,LR}
+        POP     {R4}
+        RFEFD   SP!                     ; Return from exception, no task switch
+
+switching
+        CLREX
+        CMP     R4,#0
+        ADDEQ   SP,SP,#12               ; Original R4, LR & SPSR do not need to be popped when we are paging in a different task
+        BEQ     SVC_Next                ; Runtask deleted?
+
+
+        PUSH    {R8-R11} //R4 and LR already stacked
+        MOV     R10,R4                  ; Preserve os_tsk.run
+        MOV     R11,LR                  ; Preserve os_tsk.new_tsk
+
+        ADD     R8,SP,#16               ; Unstack R4,LR
+        LDMIA   R8,{R4,LR}
+
+        SUB     SP,SP,#4                ; Make space on the stack for the next instn
+        STMIA   SP,{SP}^                ; Put User SP onto stack
+        POP     {R8}                    ; Pop User SP into R8
+
+        MRS     R9,SPSR
+        STMDB   R8!,{R9}                ; User CPSR
+        STMDB   R8!,{LR}                ; User PC
+        STMDB   R8,{LR}^                ; User LR
+        SUB     R8,R8,#4                ; No writeback for store of User LR
+        STMDB   R8!,{R0-R3,R12}         ; User R0-R3,R12
+        MOV     R3,R10                  ; os_tsk.run
+        MOV     LR,R11                  ; os_tsk.new_tsk
+        POP     {R9-R12}
+        ADD     SP,SP,#12               ; Fix up SP for unstack of R4, LR & SPSR
+        STMDB   R8!,{R4-R7,R9-R12}      ; User R4-R11
+
+        //If applicable, stack VFP/NEON state
+        MRC     p15,0,R1,c1,c0,2        ; VFP/NEON access enabled? (CPACR)
+        AND     R2,R1,#0x00F00000
+        CMP     R2,#0x00F00000
+        BNE     no_outgoing_vfp
+        VMRS    R2,FPSCR
+        STMDB   R8!,{R2,R4}             ; Push FPSCR, maintain 8-byte alignment
+        VSTMDB  R8!,{D0-D15}
+        VSTMDB  R8!,{D16-D31}
+        LDRB    R2,[R3,#TCB_STACKF]     ; Record in TCB that NEON/D32 state is stacked
+        ORR     R2,#4
+        STRB    R2,[R3,#TCB_STACKF]
+
+no_outgoing_vfp
+        STR     R8,[R3,#TCB_TSTACK]
+        MOV     R4,LR
+
+        PUSH    {R4}                    ; Push R4 so we can use it as a temp
+        AND     R4, SP, #4              ; Ensure stack is 8-byte aligned
+        SUB     SP, SP, R4              ; Adjust stack
+        PUSH    {R4, LR}                ; Store stack adjustment and dummy LR to SVC stack
+
+        BLX     rt_stk_check
+
+        POP     {R4, LR}                ; Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R4              ; Unadjust stack
+        POP     {R4}                    ; Restore R4
+
+        MOV     LR,R4
+
+SVC_Next  //R4 == os_tsk.run, LR == os_tsk.new_tsk, R0-R3, R5-R12 corruptible
+        LDR     R1,=__cpp(&os_tsk)      ; os_tsk.run = os_tsk.new_tsk
+        STR     LR,[R1]
+        LDRB    R1,[LR,#TCB_TID]        ; os_tsk.run->task_id
+        LSL     R1,#8                   ; Store PROCID
+        MCR     p15,0,R1,c13,c0,1       ; Write CONTEXTIDR
+
+        LDR     R0,[LR,#TCB_TSTACK]     ; os_tsk.run->tsk_stack
+
+        //Does incoming task have VFP/NEON state in stack?
+        LDRB    R3,[LR,#TCB_STACKF]
+        ANDS    R3, R3, #0x6
+        MRC     p15,0,R1,c1,c0,2        ; Read CPACR
+        ANDEQ   R1,R1,#0xFF0FFFFF       ; Disable VFP/NEON access if incoming task does not have stacked VFP/NEON state
+        ORRNE   R1,R1,#0x00F00000       ; Enable VFP/NEON access if incoming task does have stacked VFP/NEON state
+        MCR     p15,0,R1,c1,c0,2        ; Write CPACR
+        BEQ     no_incoming_vfp
+        ISB                             ; We only need the sync if we enabled, otherwise we will context switch before next VFP/NEON instruction anyway
+        VLDMIA  R0!,{D16-D31}
+        VLDMIA  R0!,{D0-D15}
+        LDR     R2,[R0]
+        VMSR    FPSCR,R2
+        ADD     R0,R0,#8
+
+no_incoming_vfp
+        LDR     R1,[R0,#60]             ; Restore User CPSR
+        MSR     SPSR_CXSF,R1
+        LDMIA   R0!,{R4-R11}            ; Restore User R4-R11
+        ADD     R0,R0,#4                ; Restore User R1-R3,R12
+        LDMIA   R0!,{R1-R3,R12}
+        LDMIA   R0,{LR}^                ; Restore User LR
+        ADD     R0,R0,#4                ; No writeback for load to user LR
+        LDMIA   R0!,{LR}                ; Restore User PC
+        ADD     R0,R0,#4                ; Correct User SP for unstacked user CPSR
+
+        PUSH    {R0}                    ; Push R0 onto stack
+        LDMIA   SP,{SP}^                ; Get R0 off stack into User SP
+        ADD     SP,SP,#4                ; Put SP back
+
+        LDR     R0,[R0,#-32]            ; Restore R0
+
+        PUSH    {R0-R3,R12,LR}
+
+        AND     R12, SP, #4             ; Ensure stack is 8-byte aligned
+        SUB     SP, SP, R12             ; Adjust stack
+        PUSH    {R12, LR}               ; Store stack adjustment and dummy LR to SVC stack
+
+        CPSID   i
+        BLX     rt_tsk_unlock
+
+        POP     {R12, LR}               ; Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R12             ; Unadjust stack
+
+        POP     {R0-R3,R12,LR}
+
+        MOVS    PC,LR                   ; Return from exception
+
+
+        /*------------------- User SVC -------------------------------*/
+
+SVC_User
+        LDR     R12,=SVC_Count
+        LDR     R12,[R12]
+        CMP     R4,R12                  ; Check for overflow
+        BHI     SVC_Done
+
+        LDR     R12,=SVC_Table-4
+        LDR     R12,[R12,R4,LSL #2]     ; Load SVC Function Address
+        MRS     R4,SPSR                 ; Save SPSR
+        PUSH    {R4}                    ; Push R4 so we can use it as a temp
+        AND     R4, SP, #4              ; Ensure stack is 8-byte aligned
+        SUB     SP, SP, R4              ; Adjust stack
+        PUSH    {R4, LR}                ; Store stack adjustment and dummy LR
+        BLX     R12                     ; Call SVC Function
+        POP     {R4, LR}                ; Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R4              ; Unadjust stack
+        POP     {R4}                    ; Restore R4
+        MSR     SPSR_CXSF,R4            ; Restore SPSR
+
+SVC_Done
+        PUSH    {R0-R3,R12,LR}
+
+        PUSH    {R4}                    ; Push R4 so we can use it as a temp
+        AND     R4, SP, #4              ; Ensure stack is 8-byte aligned
+        SUB     SP, SP, R4              ; Adjust stack
+        PUSH    {R4, LR}                ; Store stack adjustment and dummy LR
+
+        CPSID   i
+        BLX     rt_tsk_unlock
+
+        POP     {R4, LR}                ; Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R4              ; Unadjust stack
+        POP     {R4}                    ; Restore R4
+
+        POP     {R0-R3,R12,LR}
+        POP     {R4}
+        RFEFD   SP!                     ; Return from exception
+}
+#pragma pop
+
+#pragma push
+#pragma arm
+__asm void PendSV_Handler (U32 IRQn) {
+    ARM
+
+    IMPORT  rt_tsk_lock
+    IMPORT  IRQNestLevel                ; Flag indicates whether inside an ISR, and the depth of nesting.  0 = not in ISR.
+    IMPORT  seen_id0_active             ; Flag used to workaround GIC 390 errata 733075 - set in startup_Renesas_RZ_A1.s
+
+    ADD     SP,SP,#8 //fix up stack pointer (R0 has been pushed and will never be popped, R1 was pushed for stack alignment)
+
+    //Disable systick interrupts, then write EOIR. We want interrupts disabled before we enter the context switcher.
+    PUSH    {R0, R1}
+    BLX     rt_tsk_lock
+    POP     {R0, R1}
+    LDR     R1, =__cpp(&GICInterface_BASE)
+    LDR     R1, [R1, #0]
+    STR     R0, [R1, #0x10]
+
+    ; If it was interrupt ID0, clear the seen flag, otherwise return as normal
+    CMP     R0, #0
+    LDREQ   R1, =seen_id0_active
+    STRBEQ  R0, [R1]                    ; Clear the seen flag, using R0 (which is 0), to save loading another register
+
+    LDR     R0, =IRQNestLevel           ; Get address of nesting counter
+    LDR     R1, [R0]
+    SUB     R1, R1, #1                  ; Decrement nesting counter
+    STR     R1, [R0]
+
+    BLX     __cpp(rt_pop_req)
+
+    POP     {R1, LR}                ; Get stack adjustment & discard dummy LR
+    ADD     SP, SP, R1              ; Unadjust stack
+
+    LDR     R0,[SP,#24]
+    MSR     SPSR_CXSF,R0
+    POP     {R0-R3,R12}             ; Leave SPSR & LR on the stack
+    PUSH    {R4}
+    B       Sys_Switch
+}
+#pragma pop
+
+
+#pragma push
+#pragma arm
+__asm void OS_Tick_Handler (U32 IRQn) {
+    ARM
+
+    IMPORT  rt_tsk_lock
+    IMPORT  IRQNestLevel                ; Flag indicates whether inside an ISR, and the depth of nesting.  0 = not in ISR.
+    IMPORT  seen_id0_active             ; Flag used to workaround GIC 390 errata 733075 - set in startup_Renesas_RZ_A1.s
+
+    ADD     SP,SP,#8 //fix up stack pointer (R0 has been pushed and will never be popped, R1 was pushed for stack alignment)
+
+    PUSH    {R0, R1}
+    BLX     rt_tsk_lock
+    POP     {R0, R1}
+    LDR     R1, =__cpp(&GICInterface_BASE)
+    LDR     R1, [R1, #0]
+    STR     R0, [R1, #0x10]
+
+    ; If it was interrupt ID0, clear the seen flag, otherwise return as normal
+    CMP     R0, #0
+    LDREQ   R1, =seen_id0_active
+    STRBEQ  R0, [R1]                    ; Clear the seen flag, using R0 (which is 0), to save loading another register
+
+    LDR     R0, =IRQNestLevel           ; Get address of nesting counter
+    LDR     R1, [R0]
+    SUB     R1, R1, #1                  ; Decrement nesting counter
+    STR     R1, [R0]
+
+    BLX      __cpp(os_tick_irqack)
+    BLX      __cpp(rt_systick)
+
+    POP     {R1, LR}                ; Get stack adjustment & discard dummy LR
+    ADD     SP, SP, R1              ; Unadjust stack
+
+    LDR     R0,[SP,#24]
+    MSR     SPSR_CXSF,R0
+    POP     {R0-R3,R12}             ; Leave SPSR & LR on the stack
+    PUSH    {R4}
+    B       Sys_Switch
+}
+#pragma pop
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/TOOLCHAIN_ARM/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/TOOLCHAIN_ARM/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,57 @@
+;/*----------------------------------------------------------------------------
+; *      RL-ARM - RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.70
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used
+; *    to endorse or promote products derived from this software without
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+                AREA    SVC_TABLE, CODE, READONLY
+
+                EXPORT  SVC_Count
+
+SVC_Cnt         EQU    (SVC_End-SVC_Table)/4
+SVC_Count       DCD     SVC_Cnt
+
+; Import user SVC functions here.
+;                IMPORT  __SVC_1
+
+                EXPORT  SVC_Table
+SVC_Table
+; Insert user SVC functions here. SVC 0 used by RTL Kernel.
+;                DCD     __SVC_1                 ; InitMemorySubsystem
+
+SVC_End
+
+                END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/TOOLCHAIN_GCC/HAL_CA9.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/TOOLCHAIN_GCC/HAL_CA9.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,472 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CA9.c
+ *      Purpose: Hardware Abstraction Layer for Cortex-A9
+ *      Rev.:    8 April 2015
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 2012 - 2015 ARM Limited
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+    .global rt_set_PSP
+    .global rt_get_PSP
+    .global _alloc_box
+    .global _free_box
+    .global SVC_Handler
+    .global PendSV_Handler
+    .global OS_Tick_Handler
+
+/* macro defines form rt_HAL_CA.h */
+    .EQU CPSR_T_BIT,    0x20
+    .EQU CPSR_I_BIT,    0x80
+    .EQU CPSR_F_BIT,    0x40
+
+    .EQU MODE_USR,      0x10
+    .EQU MODE_FIQ,      0x11
+    .EQU MODE_IRQ,      0x12
+    .EQU MODE_SVC,      0x13
+    .EQU MODE_ABT,      0x17
+    .EQU MODE_UND,      0x1B
+    .EQU MODE_SYS,      0x1F
+
+/* macro defines form rt_TypeDef.h */
+    .EQU TCB_TID,        3        /* 'task id' offset                        */
+    .EQU TCB_STACKF,    37        /* 'stack_frame' offset                    */
+    .EQU TCB_TSTACK,    44        /* 'tsk_stack' offset for LARGE_STACK      */
+
+
+    .extern rt_alloc_box
+    .extern os_tsk
+    .extern GICInterface_BASE
+    .extern rt_pop_req
+    .extern os_tick_irqack
+    .extern rt_systick
+
+    .text
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+@ For A-class, set USR/SYS stack
+@ __asm void rt_set_PSP (U32 stack) {
+rt_set_PSP:
+        .ARM
+
+        MRS     R1, CPSR
+        CPS     #MODE_SYS   @no effect in USR mode
+        ISB
+        MOV     SP, R0
+        MSR     CPSR_c, R1  @no effect in USR mode
+        ISB
+        BX      LR
+
+@ }
+
+@ For A-class, get USR/SYS stack
+@ __asm U32 rt_get_PSP (void) {
+rt_get_PSP:
+        .ARM
+
+        MRS     R1, CPSR
+        CPS     #MODE_SYS   @no effect in USR mode
+        ISB
+        MOV     R0, SP
+        MSR     CPSR_c, R1  @no effect in USR mode
+        ISB
+        BX      LR
+@ }
+
+/*--------------------------- _alloc_box ------------------------------------*/
+@ __asm void *_alloc_box (void *box_mem) {
+_alloc_box:
+    /* Function wrapper for Unprivileged/Privileged mode. */
+        .ARM
+
+        LDR     R12,=rt_alloc_box
+        MRS     R2, CPSR
+        LSLS    R2, #28
+        BXNE    R12
+        SVC     0
+        BX      LR
+@ }
+
+
+/*--------------------------- _free_box -------------------------------------*/
+@ __asm int _free_box (void *box_mem, void *box) {
+_free_box:
+   /* Function wrapper for Unprivileged/Privileged mode. */
+        .ARM
+
+        LDR     R12,=rt_free_box
+        MRS     R2, CPSR
+        LSLS    R2, #28
+        BXNE    R12
+        SVC     0
+        BX      LR
+
+@ }
+
+/*-------------------------- SVC_Handler -----------------------------------*/
+
+@ #pragma push
+@ #pragma arm
+@ __asm void SVC_Handler (void) {
+SVC_Handler:
+        .eabi_attribute Tag_ABI_align8_preserved,1
+        .ARM
+
+        .extern  rt_tsk_lock
+        .extern  rt_tsk_unlock
+        .extern  SVC_Count
+        .extern  SVC_Table
+        .extern  rt_stk_check
+        .extern  FPUEnable
+        .extern  scheduler_suspended   @ flag set by rt_suspend, cleared by rt_resume, read by SVC_Handler
+
+        .EQU    Mode_SVC, 0x13
+
+        SRSDB   SP!, #Mode_SVC         @ Push LR_SVC and SPRS_SVC onto SVC mode stack  @ Use SRSDB because SRSFD isn't supported by GCC-ARM.
+        PUSH    {R4}                   @ Push R4 so we can use it as a temp
+
+        MRS     R4,SPSR                @ Get SPSR
+        TST     R4,#CPSR_T_BIT         @ Check Thumb Bit
+        LDRNEH  R4,[LR,#-2]            @ Thumb: Load Halfword
+        BICNE   R4,R4,#0xFF00          @        Extract SVC Number
+        LDREQ   R4,[LR,#-4]            @ ARM:   Load Word
+        BICEQ   R4,R4,#0xFF000000      @        Extract SVC Number
+
+        /* Lock out systick and re-enable interrupts */
+        PUSH    {R0-R3,R12,LR}
+
+        AND     R12, SP, #4            @ Ensure stack is 8-byte aligned
+        SUB     SP, SP, R12            @ Adjust stack
+        PUSH    {R12, LR}              @ Store stack adjustment and dummy LR to SVC stack
+
+        BLX     rt_tsk_lock
+        CPSIE   i
+
+        POP     {R12, LR}              @ Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R12            @ Unadjust stack
+
+        POP     {R0-R3,R12,LR}
+
+        CMP     R4,#0
+        BNE     SVC_User
+
+        MRS     R4,SPSR
+        PUSH    {R4}                    @ Push R4 so we can use it as a temp
+        AND     R4, SP, #4              @ Ensure stack is 8-byte aligned
+        SUB     SP, SP, R4              @ Adjust stack
+        PUSH    {R4, LR}                @ Store stack adjustment and dummy LR
+        BLX     R12
+        POP     {R4, LR}                @ Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R4              @ Unadjust stack
+        POP     {R4}                    @ Restore R4
+        MSR     SPSR_cxsf,R4
+
+        /* Here we will be in SVC mode (even if coming in from PendSV_Handler or OS_Tick_Handler) */
+Sys_Switch:
+        LDR     LR,=os_tsk
+        LDM     LR,{R4,LR}              @ os_tsk.run, os_tsk.new_tsk
+        CMP     R4,LR
+        BNE     switching
+
+        PUSH    {R0-R3,R12,LR}
+
+        AND     R12, SP, #4             @ Ensure stack is 8-byte aligned
+        SUB     SP, SP, R12             @ Adjust stack
+        PUSH    {R12, LR}               @ Store stack adjustment and dummy LR to SVC stack
+
+        CPSID   i
+        @ Do not unlock scheduler if it has just been suspended by rt_suspend()
+        LDR     R1,=scheduler_suspended
+        LDRB    R0, [R1]
+        CMP     R0, #1
+        BEQ     dont_unlock
+        BLX     rt_tsk_unlock
+dont_unlock:
+
+        POP     {R12, LR}               @ Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R12             @ Unadjust stack
+
+        POP     {R0-R3,R12,LR}
+        POP     {R4}
+        RFEFD   SP!                     @ Return from exception, no task switch
+
+switching:
+        CLREX
+        CMP     R4,#0
+        ADDEQ   SP,SP,#12               @ Original R4, LR & SPSR do not need to be popped when we are paging in a different task
+        BEQ     SVC_Next                @ Runtask deleted?
+
+
+        PUSH    {R8-R11} @ R4 and LR already stacked
+        MOV     R10,R4                  @ Preserve os_tsk.run
+        MOV     R11,LR                  @ Preserve os_tsk.new_tsk
+
+        ADD     R8,SP,#16               @ Unstack R4,LR
+        LDMIA   R8,{R4,LR}
+
+        SUB     SP,SP,#4                @ Make space on the stack for the next instn
+        STMIA   SP,{SP}^                @ Put User SP onto stack
+        POP     {R8}                    @ Pop User SP into R8
+
+        MRS     R9,SPSR
+        STMDB   R8!,{R9}                @ User CPSR
+        STMDB   R8!,{LR}                @ User PC
+        STMDB   R8,{LR}^                @ User LR
+        SUB     R8,R8,#4                @ No writeback for store of User LR
+        STMDB   R8!,{R0-R3,R12}         @ User R0-R3,R12
+        MOV     R3,R10                  @ os_tsk.run
+        MOV     LR,R11                  @ os_tsk.new_tsk
+        POP     {R9-R12}
+        ADD     SP,SP,#12               @ Fix up SP for unstack of R4, LR & SPSR
+        STMDB   R8!,{R4-R7,R9-R12}      @ User R4-R11
+
+        @ If applicable, stack VFP/NEON state
+        MRC     p15,0,R1,c1,c0,2        @ VFP/NEON access enabled? (CPACR)
+        AND     R2,R1,#0x00F00000
+        CMP     R2,#0x00F00000
+        BNE     no_outgoing_vfp
+        VMRS    R2,FPSCR
+        STMDB   R8!,{R2,R4}             @ Push FPSCR, maintain 8-byte alignment
+        VSTMDB  R8!,{D0-D15}
+        VSTMDB  R8!,{D16-D31}
+        LDRB    R2,[R3,#TCB_STACKF]     @ Record in TCB that NEON/D32 state is stacked
+        ORR     R2,#4
+        STRB    R2,[R3,#TCB_STACKF]
+
+no_outgoing_vfp:
+        STR     R8,[R3,#TCB_TSTACK]
+        MOV     R4,LR
+
+        PUSH    {R4}                    @ Push R4 so we can use it as a temp
+        AND     R4, SP, #4              @ Ensure stack is 8-byte aligned
+        SUB     SP, SP, R4              @ Adjust stack
+        PUSH    {R4, LR}                @ Store stack adjustment and dummy LR to SVC stack
+
+        BLX     rt_stk_check
+
+        POP     {R4, LR}                @ Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R4              @ Unadjust stack
+        POP     {R4}                    @ Restore R4
+
+        MOV     LR,R4
+
+SVC_Next:  @ R4 == os_tsk.run, LR == os_tsk.new_tsk, R0-R3, R5-R12 corruptible
+        LDR     R1,=os_tsk              @ os_tsk.run = os_tsk.new_tsk
+        STR     LR,[R1]
+        LDRB    R1,[LR,#TCB_TID]        @ os_tsk.run->task_id
+        LSL     R1,#8                   @ Store PROCID
+        MCR     p15,0,R1,c13,c0,1       @ Write CONTEXTIDR
+
+        LDR     R0,[LR,#TCB_TSTACK]     @ os_tsk.run->tsk_stack
+
+        @ Does incoming task have VFP/NEON state in stack?
+        LDRB    R3,[LR,#TCB_STACKF]
+        ANDS    R3, R3, #0x6
+        MRC     p15,0,R1,c1,c0,2        @ Read CPACR
+        ANDEQ   R1,R1,#0xFF0FFFFF       @ Disable VFP/NEON access if incoming task does not have stacked VFP/NEON state
+        ORRNE   R1,R1,#0x00F00000       @ Enable VFP/NEON access if incoming task does have stacked VFP/NEON state
+        MCR     p15,0,R1,c1,c0,2        @ Write CPACR
+        BEQ     no_incoming_vfp
+        ISB                             @ We only need the sync if we enabled, otherwise we will context switch before next VFP/NEON instruction anyway
+        VLDMIA  R0!,{D16-D31}
+        VLDMIA  R0!,{D0-D15}
+        LDR     R2,[R0]
+        VMSR    FPSCR,R2
+        ADD     R0,R0,#8
+
+no_incoming_vfp:
+        LDR     R1,[R0,#60]             @ Restore User CPSR
+        MSR     SPSR_cxsf,R1
+        LDMIA   R0!,{R4-R11}            @ Restore User R4-R11
+        ADD     R0,R0,#4                @ Restore User R1-R3,R12
+        LDMIA   R0!,{R1-R3,R12}
+        LDMIA   R0,{LR}^                @ Restore User LR
+        ADD     R0,R0,#4                @ No writeback for load to user LR
+        LDMIA   R0!,{LR}                @ Restore User PC
+        ADD     R0,R0,#4                @ Correct User SP for unstacked user CPSR
+
+        PUSH    {R0}                    @ Push R0 onto stack
+        LDMIA   SP,{SP}^                @ Get R0 off stack into User SP
+        ADD     SP,SP,#4                @ Put SP back
+
+        LDR     R0,[R0,#-32]            @ Restore R0
+
+        PUSH    {R0-R3,R12,LR}
+
+        AND     R12, SP, #4             @ Ensure stack is 8-byte aligned
+        SUB     SP, SP, R12             @ Adjust stack
+        PUSH    {R12, LR}               @ Store stack adjustment and dummy LR to SVC stack
+
+        CPSID   i
+        BLX     rt_tsk_unlock
+
+        POP     {R12, LR}               @ Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R12             @ Unadjust stack
+
+        POP     {R0-R3,R12,LR}
+
+        MOVS    PC,LR                   @ Return from exception
+
+
+        /*------------------- User SVC -------------------------------*/
+
+SVC_User:
+        LDR     R12,=SVC_Count
+        LDR     R12,[R12]
+        CMP     R4,R12                  @ Check for overflow
+        BHI     SVC_Done
+
+        LDR     R12,=SVC_Table-4
+        LDR     R12,[R12,R4,LSL #2]     @ Load SVC Function Address
+        MRS     R4,SPSR                 @ Save SPSR
+        PUSH    {R4}                    @ Push R4 so we can use it as a temp
+        AND     R4, SP, #4              @ Ensure stack is 8-byte aligned
+        SUB     SP, SP, R4              @ Adjust stack
+        PUSH    {R4, LR}                @ Store stack adjustment and dummy LR
+        BLX     R12                     @ Call SVC Function
+        POP     {R4, LR}                @ Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R4              @ Unadjust stack
+        POP     {R4}                    @ Restore R4
+        MSR     SPSR_cxsf,R4            @ Restore SPSR
+
+SVC_Done:
+        PUSH    {R0-R3,R12,LR}
+
+        PUSH    {R4}                    @ Push R4 so we can use it as a temp
+        AND     R4, SP, #4              @ Ensure stack is 8-byte aligned
+        SUB     SP, SP, R4              @ Adjust stack
+        PUSH    {R4, LR}                @ Store stack adjustment and dummy LR
+
+        CPSID   i
+        BLX     rt_tsk_unlock
+
+        POP     {R4, LR}                @ Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R4              @ Unadjust stack
+        POP     {R4}                    @ Restore R4
+
+        POP     {R0-R3,R12,LR}
+        POP     {R4}
+        RFEFD   SP!                     @ Return from exception
+@ }
+@ #pragma pop
+
+@ #pragma push
+@ #pragma arm
+@ __asm void PendSV_Handler (U32 IRQn) {
+PendSV_Handler:
+    .ARM
+
+    .extern  rt_tsk_lock
+    .extern  IRQNestLevel                @ Flag indicates whether inside an ISR, and the depth of nesting.  0 = not in ISR.
+    .extern  seen_id0_active             @ Flag used to workaround GIC 390 errata 733075 - set in startup_Renesas_RZ_A1.s
+
+    ADD     SP,SP,#8 @ fix up stack pointer (R0 has been pushed and will never be popped, R1 was pushed for stack alignment)
+
+    @ Disable systick interrupts, then write EOIR. We want interrupts disabled before we enter the context switcher.
+    PUSH    {R0, R1}
+    BLX     rt_tsk_lock
+    POP     {R0, R1}
+    LDR     R1, =GICInterface_BASE
+    LDR     R1, [R1, #0]
+    STR     R0, [R1, #0x10]
+
+    @ If it was interrupt ID0, clear the seen flag, otherwise return as normal
+    CMP     R0, #0
+    LDREQ   R1, =seen_id0_active
+    STREQB  R0, [R1]                    @ Clear the seen flag, using R0 (which is 0), to save loading another register
+
+    LDR     R0, =IRQNestLevel           @ Get address of nesting counter
+    LDR     R1, [R0]
+    SUB     R1, R1, #1                  @ Decrement nesting counter
+    STR     R1, [R0]
+
+    BLX     rt_pop_req
+
+    POP     {R1, LR}                @ Get stack adjustment & discard dummy LR
+    ADD     SP, SP, R1              @ Unadjust stack
+
+    LDR     R0,[SP,#24]
+    MSR     SPSR_cxsf,R0
+    POP     {R0-R3,R12}             @ Leave SPSR & LR on the stack
+    PUSH    {R4}
+    B       Sys_Switch
+@ }
+@ #pragma pop
+
+
+@ #pragma push
+@ #pragma arm
+@ __asm void OS_Tick_Handler (U32 IRQn) {
+OS_Tick_Handler:
+    .ARM
+
+    .extern  rt_tsk_lock
+    .extern  IRQNestLevel                @ Flag indicates whether inside an ISR, and the depth of nesting.  0 = not in ISR.
+    .extern  seen_id0_active             @ Flag used to workaround GIC 390 errata 733075 - set in startup_Renesas_RZ_A1.s
+
+    ADD     SP,SP,#8 @ fix up stack pointer (R0 has been pushed and will never be popped, R1 was pushed for stack alignment)
+
+    PUSH    {R0, R1}
+    BLX     rt_tsk_lock
+    POP     {R0, R1}
+    LDR     R1, =GICInterface_BASE
+    LDR     R1, [R1, #0]
+    STR     R0, [R1, #0x10]
+
+    @ If it was interrupt ID0, clear the seen flag, otherwise return as normal
+    CMP     R0, #0
+    LDREQ   R1, =seen_id0_active
+    STREQB  R0, [R1]                    @ Clear the seen flag, using R0 (which is 0), to save loading another register
+
+    LDR     R0, =IRQNestLevel           @ Get address of nesting counter
+    LDR     R1, [R0]
+    SUB     R1, R1, #1                  @ Decrement nesting counter
+    STR     R1, [R0]
+
+    BLX      os_tick_irqack
+    BLX      rt_systick
+
+    POP     {R1, LR}                @ Get stack adjustment & discard dummy LR
+    ADD     SP, SP, R1              @ Unadjust stack
+
+    LDR     R0,[SP,#24]
+    MSR     SPSR_cxsf,R0
+    POP     {R0-R3,R12}             @ Leave SPSR & LR on the stack
+    PUSH    {R4}
+    B       Sys_Switch
+@ }
+@ #pragma pop
+
+
+    .END
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/TOOLCHAIN_GCC/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/TOOLCHAIN_GCC/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,57 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    SVC_TABLE.S
+ *      Purpose: Pre-defined SVC Table for Cortex-M
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+
+                .section    SVC_TABLE @, CODE, READONLY
+
+                .global  SVC_Count
+
+.EQU    SVC_Cnt,        (SVC_End-SVC_Table)/4
+SVC_Count:      .word   SVC_Cnt
+
+@ Import user SVC functions here.
+@                .extern __SVC_1
+
+                .global SVC_Table
+SVC_Table:
+@ Insert user SVC functions here. SVC 0 used by RTL Kernel.
+@                .word   __SVC_1                 @ InitMemorySubsystem
+
+SVC_End:
+
+                .END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/TOOLCHAIN_IAR/HAL_CA9.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/TOOLCHAIN_IAR/HAL_CA9.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,46 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CA9.c
+ *      Purpose: Hardware Abstraction Layer for Cortex-A9
+ *      Rev.:    23 March 2015
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 2012 - 2015 ARM Limited
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used 
+ *    to endorse or promote products derived from this software without 
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+//unsigned char seen_id0_active = 0; // single byte to hold a flag used in the workaround for GIC errata 733075
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+/* Functions move to HAL_CA9_asm.S */
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/TOOLCHAIN_IAR/HAL_CA9_asm.s
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/TOOLCHAIN_IAR/HAL_CA9_asm.s	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,480 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CA9.c
+ *      Purpose: Hardware Abstraction Layer for Cortex-A9
+ *      Rev.:    8 April 2015
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 2012 - 2015 ARM Limited
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used 
+ *    to endorse or promote products derived from this software without 
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+        PUBLIC rt_set_PSP
+        PUBLIC rt_get_PSP
+        PUBLIC _alloc_box
+        PUBLIC _free_box
+        PUBLIC SWI_Handler
+        PUBLIC PendSV_Handler
+        PUBLIC OS_Tick_Handler
+
+/* macro defines form rt_HAL_CA.h */
+#define CPSR_T_BIT      0x20
+#define CPSR_I_BIT      0x80
+#define CPSR_F_BIT      0x40
+
+#define MODE_USR        0x10
+#define MODE_FIQ        0x11
+#define MODE_IRQ        0x12
+#define MODE_SVC        0x13
+#define MODE_ABT        0x17
+#define MODE_UND        0x1B
+#define MODE_SYS        0x1F
+
+/* macro defines form rt_TypeDef.h */
+#define TCB_TID          3        /* 'task id' offset                        */
+#define TCB_STACKF      37        /* 'stack_frame' offset                    */
+#ifndef __LARGE_PRIV_STACK
+#define TCB_TSTACK      40        /* 'tsk_stack' offset                      */
+#else
+#define TCB_TSTACK      44        /* 'tsk_stack' offset for LARGE_STACK      */
+#endif
+
+
+        IMPORT rt_alloc_box
+        IMPORT rt_free_box
+        IMPORT os_tsk
+        IMPORT GICInterface_BASE
+        IMPORT rt_pop_req
+        IMPORT os_tick_irqack
+        IMPORT rt_systick
+
+        SECTION `.text`:CODE:ROOT(2)
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+//For A-class, set USR/SYS stack
+//__asm void rt_set_PSP (U32 stack) {
+rt_set_PSP:
+        ARM
+
+        MRS     R1, CPSR
+        CPS     #MODE_SYS   ;no effect in USR mode
+        ISB
+        MOV     SP, R0
+        MSR     CPSR_c, R1  ;no effect in USR mode
+        ISB
+        BX      LR
+
+//}
+
+//For A-class, get USR/SYS stack
+//__asm U32 rt_get_PSP (void) {
+rt_get_PSP:
+        ARM
+
+        MRS     R1, CPSR
+        CPS     #MODE_SYS   ;no effect in USR mode
+        ISB
+        MOV     R0, SP
+        MSR     CPSR_c, R1  ;no effect in USR mode
+        ISB
+        BX      LR
+//}
+
+/*--------------------------- _alloc_box ------------------------------------*/
+//__asm void *_alloc_box (void *box_mem) {
+_alloc_box:
+    /* Function wrapper for Unprivileged/Privileged mode. */
+        ARM
+
+        LDR     R12,=(rt_alloc_box)
+        MRS     R2, CPSR
+        LSLS    R2, R2,#28
+        BXNE    R12
+        SVC     0
+        BX      LR
+//}
+
+
+/*--------------------------- _free_box -------------------------------------*/
+//__asm int _free_box (void *box_mem, void *box) {
+_free_box:
+   /* Function wrapper for Unprivileged/Privileged mode. */
+
+        LDR     R12,=(rt_free_box)
+        MRS     R2, CPSR
+        LSLS    R2, R2,#28
+        BXNE    R12
+        SVC     0
+        BX      LR
+
+//}
+
+/*-------------------------- SWI_Handler -----------------------------------*/
+
+//#pragma push
+//#pragma arm
+//__asm void SWI_Handler (void) {
+SWI_Handler:
+        PRESERVE8
+        ARM
+
+        IMPORT  rt_tsk_lock
+        IMPORT  rt_tsk_unlock
+        IMPORT  SVC_Count
+        IMPORT  SVC_Table
+        IMPORT  rt_stk_check
+        IMPORT  FPUEnable
+        IMPORT  scheduler_suspended    ; flag set by rt_suspend, cleared by rt_resume, read by SWI_Handler
+
+Mode_SVC        EQU     0x13
+
+        SRSDB   #Mode_SVC!             ; Push LR_SVC and SPRS_SVC onto SVC mode stack
+        STR     R4,[SP,#-0x4]!         ; Push R4 so we can use it as a temp
+
+        MRS     R4,SPSR                ; Get SPSR
+        TST     R4,#CPSR_T_BIT         ; Check Thumb Bit
+        LDRNEH  R4,[LR,#-2]            ; Thumb: Load Halfword
+        BICNE   R4,R4,#0xFF00          ;        Extract SVC Number
+        LDREQ   R4,[LR,#-4]            ; ARM:   Load Word
+        BICEQ   R4,R4,#0xFF000000      ;        Extract SVC Number
+
+        /* Lock out systick and re-enable interrupts */
+        STMDB   SP!,{R0-R3,R12,LR}
+
+        AND     R12, SP, #4            ; Ensure stack is 8-byte aligned
+        SUB     SP, SP, R12            ; Adjust stack
+        STMDB   SP!,{R12, LR}          ; Store stack adjustment and dummy LR to SVC stack
+
+        BLX     rt_tsk_lock
+        CPSIE   i
+
+        LDMIA   SP!,{R12,LR}           ; Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R12            ; Unadjust stack
+
+        LDMIA   SP!,{R0-R3,R12,LR}
+
+        CMP     R4,#0
+        BNE     SVC_User
+
+        MRS     R4,SPSR
+        STR     R4,[SP,#-0x4]!         ; Push R4 so we can use it as a temp
+        AND     R4, SP, #4              ; Ensure stack is 8-byte aligned
+        SUB     SP, SP, R4              ; Adjust stack
+        STMDB   SP!,{R4, LR}            ; Store stack adjustment and dummy LR
+        BLX     R12
+        LDMIA   SP!,{R4, LR}            ; Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R4              ; Unadjust stack
+        LDR     R4,[SP],#0x4            ; Restore R4
+        MSR     SPSR_CXSF,R4
+
+        /* Here we will be in SVC mode (even if coming in from PendSV_Handler or OS_Tick_Handler) */
+Sys_Switch:
+        LDR     LR,=(os_tsk)
+        LDMIA   LR,{R4,LR}              ; os_tsk.run, os_tsk.new
+        CMP     R4,LR
+        BNE     switching
+
+        STMDB   SP!,{R0-R3,R12,LR}
+
+        AND     R12, SP, #4             ; Ensure stack is 8-byte aligned
+        SUB     SP, SP, R12             ; Adjust stack
+        STMDB   SP!,{R12,LR}            ; Store stack adjustment and dummy LR to SVC stack
+
+        CPSID   i
+        ; Do not unlock scheduler if it has just been suspended by rt_suspend()
+        LDR     R1,=scheduler_suspended
+        LDRB    R0, [R1]
+        CMP     R0, #1
+        BEQ     dont_unlock
+        BLX     rt_tsk_unlock
+dont_unlock:
+
+        LDMIA   SP!,{R12,LR}            ; Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R12             ; Unadjust stack
+
+        LDMIA   SP!,{R0-R3,R12,LR}
+        LDR     R4,[SP],#0x4
+        RFEFD   SP!                     ; Return from exception, no task switch
+
+switching:
+        CLREX
+        CMP     R4,#0
+        ADDEQ   SP,SP,#12               ; Original R4, LR & SPSR do not need to be popped when we are paging in a different task
+        BEQ     SVC_Next                ; Runtask deleted?
+
+
+        STMDB   SP!,{R8-R11} //R4 and LR already stacked
+        MOV     R10,R4                  ; Preserve os_tsk.run
+        MOV     R11,LR                  ; Preserve os_tsk.new
+
+        ADD     R8,SP,#16               ; Unstack R4,LR
+        LDMIA   R8,{R4,LR}
+
+        SUB     SP,SP,#4                ; Make space on the stack for the next instn
+        STMIA   SP,{SP}^                ; Put User SP onto stack
+        LDR     R8,[SP],#0x4            ; Pop User SP into R8
+
+        MRS     R9,SPSR
+        STMDB   R8!,{R9}                ; User CPSR
+        STMDB   R8!,{LR}                ; User PC
+        STMDB   R8,{LR}^                ; User LR
+        SUB     R8,R8,#4                ; No writeback for store of User LR
+        STMDB   R8!,{R0-R3,R12}         ; User R0-R3,R12
+        MOV     R3,R10                  ; os_tsk.run
+        MOV     LR,R11                  ; os_tsk.new
+        LDMIA   SP!,{R9-R12}
+        ADD     SP,SP,#12               ; Fix up SP for unstack of R4, LR & SPSR
+        STMDB   R8!,{R4-R7,R9-R12}      ; User R4-R11
+
+        //If applicable, stack VFP/NEON state
+        MRC     p15,0,R1,c1,c0,2        ; VFP/NEON access enabled? (CPACR)
+        AND     R2,R1,#0x00F00000
+        CMP     R2,#0x00F00000
+        BNE     no_outgoing_vfp
+        VMRS    R2,FPSCR
+        STMDB   R8!,{R2,R4}             ; Push FPSCR, maintain 8-byte alignment
+  //IF {TARGET_FEATURE_EXTENSION_REGISTER_COUNT} == 32
+        VSTMDB  R8!,{D0-D15}
+        VSTMDB  R8!,{D16-D31}
+        LDRB    R2,[R3,#TCB_STACKF]     ; Record in TCB that NEON/D32 state is stacked
+        ORR     R2,R2,#4
+        STRB    R2,[R3,#TCB_STACKF]
+  //ENDIF
+
+no_outgoing_vfp:
+        STR     R8,[R3,#TCB_TSTACK]
+        MOV     R4,LR
+
+        STR     R4,[SP,#-0x4]!          ; Push R4 so we can use it as a temp
+        AND     R4, SP, #4              ; Ensure stack is 8-byte aligned
+        SUB     SP, SP, R4              ; Adjust stack
+        STMDB   SP!,{R4, LR}            ; Store stack adjustment and dummy LR to SVC stack
+
+        BLX     rt_stk_check
+
+        LDMIA   SP!,{R4, LR}            ; Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R4              ; Unadjust stack
+        LDR     R4,[SP],#0x4            ; Restore R4
+
+        MOV     LR,R4
+
+SVC_Next:  //R4 == os_tsk.run, LR == os_tsk.new, R0-R3, R5-R12 corruptible
+        LDR     R1,=(os_tsk)            ; os_tsk.run = os_tsk.new
+        STR     LR,[R1]
+        LDRB    R1,[LR,#TCB_TID]        ; os_tsk.run->task_id
+        LSL     R1,R1,#8                ; Store PROCID
+        MCR     p15,0,R1,c13,c0,1       ; Write CONTEXTIDR
+
+        LDR     R0,[LR,#TCB_TSTACK]     ; os_tsk.run->tsk_stack
+
+        //Does incoming task have VFP/NEON state in stack?
+        LDRB    R3,[LR,#TCB_STACKF]
+        ANDS    R3, R3, #0x6
+        MRC     p15,0,R1,c1,c0,2        ; Read CPACR
+        BICEQ   R1,R1,#0x00F00000       ; Disable VFP/NEON access if incoming task does not have stacked VFP/NEON state
+        ORRNE   R1,R1,#0x00F00000       ; Enable VFP/NEON access if incoming task does have stacked VFP/NEON state
+        MCR     p15,0,R1,c1,c0,2        ; Write CPACR
+        BEQ     no_incoming_vfp
+        ISB                             ; We only need the sync if we enabled, otherwise we will context switch before next VFP/NEON instruction anyway
+  //IF {TARGET_FEATURE_EXTENSION_REGISTER_COUNT} == 32
+        VLDMIA  R0!,{D16-D31}
+  //ENDIF
+        VLDMIA  R0!,{D0-D15}
+        LDR     R2,[R0]
+        VMSR    FPSCR,R2
+        ADD     R0,R0,#8
+
+no_incoming_vfp:
+        LDR     R1,[R0,#60]             ; Restore User CPSR
+        MSR     SPSR_CXSF,R1
+        LDMIA   R0!,{R4-R11}            ; Restore User R4-R11
+        ADD     R0,R0,#4                ; Restore User R1-R3,R12
+        LDMIA   R0!,{R1-R3,R12}
+        LDMIA   R0,{LR}^                ; Restore User LR
+        ADD     R0,R0,#4                ; No writeback for load to user LR
+        LDMIA   R0!,{LR}                ; Restore User PC
+        ADD     R0,R0,#4                ; Correct User SP for unstacked user CPSR
+
+        STR     R0,[SP,#-0x4]!          ; Push R0 onto stack
+        LDMIA   SP,{SP}^                ; Get R0 off stack into User SP
+        ADD     SP,SP,#4                ; Put SP back
+
+        LDR     R0,[R0,#-32]            ; Restore R0
+
+        STMDB   SP!,{R0-R3,R12,LR}
+
+        AND     R12, SP, #4             ; Ensure stack is 8-byte aligned
+        SUB     SP, SP, R12             ; Adjust stack
+        STMDB   sp!,{R12, LR}           ; Store stack adjustment and dummy LR to SVC stack
+
+        CPSID   i
+        BLX     rt_tsk_unlock
+
+        LDMIA   sp!,{R12, LR}           ; Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R12             ; Unadjust stack
+
+        LDMIA   SP!,{R0-R3,R12,LR}
+
+        MOVS    PC,LR                   ; Return from exception
+
+
+        /*------------------- User SVC -------------------------------*/
+
+SVC_User:
+        LDR     R12,=SVC_Count
+        LDR     R12,[R12]
+        CMP     R4,R12                  ; Check for overflow
+        BHI     SVC_Done
+
+        LDR     R12,=SVC_Table-4
+        LDR     R12,[R12,R4,LSL #2]     ; Load SVC Function Address
+        MRS     R4,SPSR                 ; Save SPSR
+        STR     R4,[SP,#-0x4]!          ; Push R4 so we can use it as a temp
+        AND     R4, SP, #4              ; Ensure stack is 8-byte aligned
+        SUB     SP, SP, R4              ; Adjust stack
+        STMDB   SP!,{R4, LR}            ; Store stack adjustment and dummy LR
+        BLX     R12                     ; Call SVC Function
+        LDMIA   SP!,{R4, LR}            ; Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R4              ; Unadjust stack
+        LDR     R4,[SP],#0x4            ; Restore R4
+        MSR     SPSR_CXSF,R4            ; Restore SPSR
+
+SVC_Done:
+        STMDB   sp!,{R0-R3,R12,LR}
+
+        STR     R4,[sp,#-0x4]!          ; Push R4 so we can use it as a temp
+        AND     R4, SP, #4              ; Ensure stack is 8-byte aligned
+        SUB     SP, SP, R4              ; Adjust stack
+        STMDB   SP!,{R4, LR}            ; Store stack adjustment and dummy LR
+
+        CPSID   i
+        BLX     rt_tsk_unlock
+
+        LDMIA   SP!,{R4, LR}            ; Get stack adjustment & discard dummy LR
+        ADD     SP, SP, R4              ; Unadjust stack
+        LDR     R4,[SP],#0x4            ; Restore R4
+
+        LDMIA   SP!,{R0-R3,R12,LR}
+        LDR     R4,[SP],#0x4
+        RFEFD   SP!                     ; Return from exception
+//}
+//#pragma pop
+
+//#pragma push
+//#pragma arm
+//__asm void PendSV_Handler (U32 IRQn) {
+PendSV_Handler:
+    ARM
+
+    IMPORT  rt_tsk_lock
+    IMPORT  IRQNestLevel                ; Flag indicates whether inside an ISR, and the depth of nesting.  0 = not in ISR.
+    IMPORT  seen_id0_active             ; Flag used to workaround GIC 390 errata 733075 - set in startup_Renesas_RZ_A1.s
+
+    ADD     SP,SP,#8 //fix up stack pointer (R0 has been pushed and will never be popped, R1 was pushed for stack alignment)
+
+    //Disable systick interrupts, then write EOIR. We want interrupts disabled before we enter the context switcher.
+    STMDB   SP!,{R0, R1}
+    BLX     rt_tsk_lock
+    LDMIA   SP!,{R0, R1}
+    LDR     R1,=(GICInterface_BASE)
+    LDR     R1, [R1, #0]
+    STR     R0, [R1, #0x10]
+
+    ; If it was interrupt ID0, clear the seen flag, otherwise return as normal
+    CMP     R0, #0
+    LDREQ   R1, =seen_id0_active
+    STRBEQ  R0, [R1]                    ; Clear the seen flag, using R0 (which is 0), to save loading another register
+
+    LDR     R0, =IRQNestLevel           ; Get address of nesting counter
+    LDR     R1, [R0]
+    SUB     R1, R1, #1                  ; Decrement nesting counter
+    STR     R1, [R0]
+
+    BLX     (rt_pop_req)
+
+    LDMIA   SP!,{R1, LR}            ; Get stack adjustment & discard dummy LR
+    ADD     SP, SP, R1              ; Unadjust stack
+
+    LDR     R0,[SP,#24]
+    MSR     SPSR_CXSF,R0
+    LDMIA   SP!,{R0-R3,R12}         ; Leave SPSR & LR on the stack
+    STR     R4,[SP,#-0x4]!
+    B       Sys_Switch
+//}
+//#pragma pop
+
+
+//#pragma push
+//#pragma arm
+//__asm void OS_Tick_Handler (U32 IRQn) {
+OS_Tick_Handler:
+    ARM
+
+    IMPORT  rt_tsk_lock
+    IMPORT  IRQNestLevel                ; Flag indicates whether inside an ISR, and the depth of nesting.  0 = not in ISR.
+    IMPORT  seen_id0_active             ; Flag used to workaround GIC 390 errata 733075 - set in startup_Renesas_RZ_A1.s
+
+    ADD     SP,SP,#8 //fix up stack pointer (R0 has been pushed and will never be popped, R1 was pushed for stack alignment)
+
+    STMDB   SP!,{R0, R1}
+    BLX     rt_tsk_lock
+    LDMIA   SP!,{R0, R1}
+    LDR     R1, =(GICInterface_BASE)
+    LDR     R1, [R1, #0]
+    STR     R0, [R1, #0x10]
+
+    ; If it was interrupt ID0, clear the seen flag, otherwise return as normal
+    CMP     R0, #0
+    LDREQ   R1, =seen_id0_active
+    STRBEQ  R0, [R1]                    ; Clear the seen flag, using R0 (which is 0), to save loading another register
+
+    LDR     R0, =IRQNestLevel           ; Get address of nesting counter
+    LDR     R1, [R0]
+    SUB     R1, R1, #1                  ; Decrement nesting counter
+    STR     R1, [R0]
+
+    BLX     (os_tick_irqack)
+    BLX     (rt_systick)
+
+    LDMIA   SP!,{R1, LR}            ; Get stack adjustment & discard dummy LR
+    ADD     SP, SP, R1              ; Unadjust stack
+
+    LDR     R0,[SP,#24]
+    MSR     SPSR_CXSF,R0
+    LDMIA   SP!,{R0-R3,R12}         ; Leave SPSR & LR on the stack
+    STR     R4,[SP,#-0x4]!
+    B       Sys_Switch
+//}
+//#pragma pop
+
+
+  END
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/TOOLCHAIN_IAR/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/TOOLCHAIN_IAR/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,57 @@
+;/*----------------------------------------------------------------------------
+; *      RL-ARM - RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.70
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used 
+; *    to endorse or promote products derived from this software without 
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+                SECTION SVC_TABLE:CODE:ROOT(2)
+
+                EXPORT  SVC_Count
+
+SVC_Cnt         EQU    (SVC_End-SVC_Table)/4
+SVC_Count       DCD     SVC_Cnt
+
+; Import user SVC functions here.
+;                IMPORT  __SVC_1
+
+                EXPORT  SVC_Table
+SVC_Table
+; Insert user SVC functions here. SVC 0 used by RTL Kernel.
+;                DCD     __SVC_1                 ; InitMemorySubsystem
+
+SVC_End
+
+                END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/cmsis_os.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/cmsis_os.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,879 @@
+/* ----------------------------------------------------------------------
+ * $Date:        5. February 2013
+ * $Revision:    V1.02
+ *
+ * Project:      CMSIS-RTOS API
+ * Title:        cmsis_os.h RTX header file
+ *
+ * Version 0.02
+ *    Initial Proposal Phase
+ * Version 0.03
+ *    osKernelStart added, optional feature: main started as thread
+ *    osSemaphores have standard behavior
+ *    osTimerCreate does not start the timer, added osTimerStart
+ *    osThreadPass is renamed to osThreadYield
+ * Version 1.01
+ *    Support for C++ interface
+ *     - const attribute removed from the osXxxxDef_t typedef's
+ *     - const attribute added to the osXxxxDef macros
+ *    Added: osTimerDelete, osMutexDelete, osSemaphoreDelete
+ *    Added: osKernelInitialize
+ * Version 1.02
+ *    Control functions for short timeouts in microsecond resolution:
+ *    Added: osKernelSysTick, osKernelSysTickFrequency, osKernelSysTickMicroSec
+ *    Removed: osSignalGet 
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 2013 ARM LIMITED
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/**
+\page cmsis_os_h Header File Template: cmsis_os.h
+
+The file \b cmsis_os.h is a template header file for a CMSIS-RTOS compliant Real-Time Operating System (RTOS).
+Each RTOS that is compliant with CMSIS-RTOS shall provide a specific \b cmsis_os.h header file that represents
+its implementation.
+
+The file cmsis_os.h contains:
+ - CMSIS-RTOS API function definitions
+ - struct definitions for parameters and return types
+ - status and priority values used by CMSIS-RTOS API functions
+ - macros for defining threads and other kernel objects
+
+
+<b>Name conventions and header file modifications</b>
+
+All definitions are prefixed with \b os to give an unique name space for CMSIS-RTOS functions.
+Definitions that are prefixed \b os_ are not used in the application code but local to this header file.
+All definitions and functions that belong to a module are grouped and have a common prefix, i.e. \b osThread.
+
+Definitions that are marked with <b>CAN BE CHANGED</b> can be adapted towards the needs of the actual CMSIS-RTOS implementation.
+These definitions can be specific to the underlying RTOS kernel.
+
+Definitions that are marked with <b>MUST REMAIN UNCHANGED</b> cannot be altered. Otherwise the CMSIS-RTOS implementation is no longer
+compliant to the standard. Note that some functions are optional and need not to be provided by every CMSIS-RTOS implementation.
+
+
+<b>Function calls from interrupt service routines</b>
+
+The following CMSIS-RTOS functions can be called from threads and interrupt service routines (ISR):
+  - \ref osSignalSet
+  - \ref osSemaphoreRelease
+  - \ref osPoolAlloc, \ref osPoolCAlloc, \ref osPoolFree
+  - \ref osMessagePut, \ref osMessageGet
+  - \ref osMailAlloc, \ref osMailCAlloc, \ref osMailGet, \ref osMailPut, \ref osMailFree
+
+Functions that cannot be called from an ISR are verifying the interrupt status and return in case that they are called
+from an ISR context the status code \b osErrorISR. In some implementations this condition might be caught using the HARD FAULT vector.
+
+Some CMSIS-RTOS implementations support CMSIS-RTOS function calls from multiple ISR at the same time.
+If this is impossible, the CMSIS-RTOS rejects calls by nested ISR functions with the status code \b osErrorISRRecursive.
+
+
+<b>Define and reference object definitions</b>
+
+With <b>\#define osObjectsExternal</b> objects are defined as external symbols. This allows to create a consistent header file
+that is used throughout a project as shown below:
+
+<i>Header File</i>
+\code
+#include <cmsis_os.h>                                         // CMSIS RTOS header file
+
+// Thread definition
+extern void thread_sample (void const *argument);             // function prototype
+osThreadDef (thread_sample, osPriorityBelowNormal, 1, 100);
+
+// Pool definition
+osPoolDef(MyPool, 10, long);
+\endcode
+
+
+This header file defines all objects when included in a C/C++ source file. When <b>\#define osObjectsExternal</b> is
+present before the header file, the objects are defined as external symbols. A single consistent header file can therefore be
+used throughout the whole project.
+
+<i>Example</i>
+\code
+#include "osObjects.h"     // Definition of the CMSIS-RTOS objects
+\endcode
+
+\code
+#define osObjectExternal   // Objects will be defined as external symbols
+#include "osObjects.h"     // Reference to the CMSIS-RTOS objects
+\endcode
+
+*/
+
+#ifndef _CMSIS_OS_H
+#define _CMSIS_OS_H
+
+/// \note MUST REMAIN UNCHANGED: \b osCMSIS identifies the CMSIS-RTOS API version.
+#define osCMSIS           0x10002      ///< API version (main [31:16] .sub [15:0])
+
+/// \note CAN BE CHANGED: \b osCMSIS_KERNEL identifies the underlying RTOS kernel and version number.
+#define osCMSIS_RTX     ((4<<16)|74)   ///< RTOS identification and version (main [31:16] .sub [15:0])
+
+/// \note MUST REMAIN UNCHANGED: \b osKernelSystemId shall be consistent in every CMSIS-RTOS.
+#define osKernelSystemId "RTX V4.74"   ///< RTOS identification string
+
+#define CMSIS_OS_RTX
+#define CMSIS_OS_RTX_CA          /* new define for Coretex-A */
+
+// The stack space occupied is mainly dependent on the underling C standard library
+#if defined(TOOLCHAIN_GCC) || defined(TOOLCHAIN_ARM_STD) || defined(TOOLCHAIN_IAR)
+#    define WORDS_STACK_SIZE   512
+#elif defined(TOOLCHAIN_ARM_MICRO)
+#    define WORDS_STACK_SIZE   128
+#endif
+
+#define DEFAULT_STACK_SIZE         (WORDS_STACK_SIZE*4)
+
+/// \note MUST REMAIN UNCHANGED: \b osFeature_xxx shall be consistent in every CMSIS-RTOS.
+#define osFeature_MainThread   1       ///< main thread      1=main can be thread, 0=not available
+#define osFeature_Pool         1       ///< Memory Pools:    1=available, 0=not available
+#define osFeature_MailQ        1       ///< Mail Queues:     1=available, 0=not available
+#define osFeature_MessageQ     1       ///< Message Queues:  1=available, 0=not available
+#define osFeature_Signals      16      ///< maximum number of Signal Flags available per thread
+#define osFeature_Semaphore    65535   ///< maximum count for \ref osSemaphoreCreate function
+#define osFeature_Wait         0       ///< osWait function: 1=available, 0=not available
+#define osFeature_SysTick      1       ///< osKernelSysTick functions: 1=available, 0=not available
+#define osFeature_ThreadEnum   1       ///< Thread enumeration available
+
+#if defined (__CC_ARM)
+#define os_InRegs __value_in_regs      // Compiler specific: force struct in registers
+#else
+#define os_InRegs
+#endif
+
+#include <stdint.h>
+#include <stddef.h>
+
+#ifdef  __cplusplus
+extern "C"
+{
+#endif
+
+
+// ==== Enumeration, structures, defines ====
+
+/// Priority used for thread control.
+/// \note MUST REMAIN UNCHANGED: \b osPriority shall be consistent in every CMSIS-RTOS.
+typedef enum  {
+  osPriorityIdle          = -3,          ///< priority: idle (lowest)
+  osPriorityLow           = -2,          ///< priority: low
+  osPriorityBelowNormal   = -1,          ///< priority: below normal
+  osPriorityNormal        =  0,          ///< priority: normal (default)
+  osPriorityAboveNormal   = +1,          ///< priority: above normal
+  osPriorityHigh          = +2,          ///< priority: high
+  osPriorityRealtime      = +3,          ///< priority: realtime (highest)
+  osPriorityError         =  0x84        ///< system cannot determine priority or thread has illegal priority
+} osPriority;
+
+/// Timeout value.
+/// \note MUST REMAIN UNCHANGED: \b osWaitForever shall be consistent in every CMSIS-RTOS.
+#define osWaitForever     0xFFFFFFFF     ///< wait forever timeout value
+
+/// Status code values returned by CMSIS-RTOS functions.
+/// \note MUST REMAIN UNCHANGED: \b osStatus shall be consistent in every CMSIS-RTOS.
+typedef enum  {
+  osOK                    =     0,       ///< function completed; no error or event occurred.
+  osEventSignal           =  0x08,       ///< function completed; signal event occurred.
+  osEventMessage          =  0x10,       ///< function completed; message event occurred.
+  osEventMail             =  0x20,       ///< function completed; mail event occurred.
+  osEventTimeout          =  0x40,       ///< function completed; timeout occurred.
+  osErrorParameter        =  0x80,       ///< parameter error: a mandatory parameter was missing or specified an incorrect object.
+  osErrorResource         =  0x81,       ///< resource not available: a specified resource was not available.
+  osErrorTimeoutResource  =  0xC1,       ///< resource not available within given time: a specified resource was not available within the timeout period.
+  osErrorISR              =  0x82,       ///< not allowed in ISR context: the function cannot be called from interrupt service routines.
+  osErrorISRRecursive     =  0x83,       ///< function called multiple times from ISR with same object.
+  osErrorPriority         =  0x84,       ///< system cannot determine priority or thread has illegal priority.
+  osErrorNoMemory         =  0x85,       ///< system is out of memory: it was impossible to allocate or reserve memory for the operation.
+  osErrorValue            =  0x86,       ///< value of a parameter is out of range.
+  osErrorOS               =  0xFF,       ///< unspecified RTOS error: run-time error but no other error message fits.
+  os_status_reserved      =  0x7FFFFFFF  ///< prevent from enum down-size compiler optimization.
+} osStatus;
+
+
+/// Timer type value for the timer definition.
+/// \note MUST REMAIN UNCHANGED: \b os_timer_type shall be consistent in every CMSIS-RTOS.
+typedef enum  {
+  osTimerOnce             =     0,       ///< one-shot timer
+  osTimerPeriodic         =     1        ///< repeating timer
+} os_timer_type;
+
+typedef enum {
+  osThreadInfoState,
+  osThreadInfoStackSize,
+  osThreadInfoStackMax,
+  osThreadInfoEntry,
+  osThreadInfoArg,
+
+  osThreadInfo_reserved   =  0x7FFFFFFF  ///< prevent from enum down-size compiler optimization.
+} osThreadInfo;
+
+/// Entry point of a thread.
+/// \note MUST REMAIN UNCHANGED: \b os_pthread shall be consistent in every CMSIS-RTOS.
+typedef void (*os_pthread) (void const *argument);
+
+/// Entry point of a timer call back function.
+/// \note MUST REMAIN UNCHANGED: \b os_ptimer shall be consistent in every CMSIS-RTOS.
+typedef void (*os_ptimer) (void const *argument);
+
+// >>> the following data type definitions may shall adapted towards a specific RTOS
+
+/// Thread ID identifies the thread (pointer to a thread control block).
+/// \note CAN BE CHANGED: \b os_thread_cb is implementation specific in every CMSIS-RTOS.
+typedef struct os_thread_cb *osThreadId;
+
+/// Timer ID identifies the timer (pointer to a timer control block).
+/// \note CAN BE CHANGED: \b os_timer_cb is implementation specific in every CMSIS-RTOS.
+typedef struct os_timer_cb *osTimerId;
+
+/// Mutex ID identifies the mutex (pointer to a mutex control block).
+/// \note CAN BE CHANGED: \b os_mutex_cb is implementation specific in every CMSIS-RTOS.
+typedef struct os_mutex_cb *osMutexId;
+
+/// Semaphore ID identifies the semaphore (pointer to a semaphore control block).
+/// \note CAN BE CHANGED: \b os_semaphore_cb is implementation specific in every CMSIS-RTOS.
+typedef struct os_semaphore_cb *osSemaphoreId;
+
+/// Pool ID identifies the memory pool (pointer to a memory pool control block).
+/// \note CAN BE CHANGED: \b os_pool_cb is implementation specific in every CMSIS-RTOS.
+typedef struct os_pool_cb *osPoolId;
+
+/// Message ID identifies the message queue (pointer to a message queue control block).
+/// \note CAN BE CHANGED: \b os_messageQ_cb is implementation specific in every CMSIS-RTOS.
+typedef struct os_messageQ_cb *osMessageQId;
+
+/// Mail ID identifies the mail queue (pointer to a mail queue control block).
+/// \note CAN BE CHANGED: \b os_mailQ_cb is implementation specific in every CMSIS-RTOS.
+typedef struct os_mailQ_cb *osMailQId;
+
+/// Thread enumeration ID identifies the enumeration (pointer to a thread enumeration control block).
+typedef uint32_t *osThreadEnumId;
+
+/// Thread Definition structure contains startup information of a thread.
+/// \note CAN BE CHANGED: \b os_thread_def is implementation specific in every CMSIS-RTOS.
+typedef struct os_thread_def  {
+  os_pthread               pthread;    ///< start address of thread function
+  osPriority             tpriority;    ///< initial thread priority
+  uint32_t               instances;    ///< maximum number of instances of that thread function
+  uint32_t               stacksize;    ///< stack size requirements in bytes; 0 is default stack size
+#ifdef __MBED_CMSIS_RTOS_CA9
+  uint32_t               *stack_pointer;  ///< pointer to the stack memory block
+#endif
+} osThreadDef_t;
+
+/// Timer Definition structure contains timer parameters.
+/// \note CAN BE CHANGED: \b os_timer_def is implementation specific in every CMSIS-RTOS.
+typedef struct os_timer_def  {
+  os_ptimer                 ptimer;    ///< start address of a timer function
+  void                      *timer;    ///< pointer to internal data
+} osTimerDef_t;
+
+/// Mutex Definition structure contains setup information for a mutex.
+/// \note CAN BE CHANGED: \b os_mutex_def is implementation specific in every CMSIS-RTOS.
+typedef struct os_mutex_def  {
+  void                      *mutex;    ///< pointer to internal data
+} osMutexDef_t;
+
+/// Semaphore Definition structure contains setup information for a semaphore.
+/// \note CAN BE CHANGED: \b os_semaphore_def is implementation specific in every CMSIS-RTOS.
+typedef struct os_semaphore_def  {
+  void                  *semaphore;    ///< pointer to internal data
+} osSemaphoreDef_t;
+
+/// Definition structure for memory block allocation.
+/// \note CAN BE CHANGED: \b os_pool_def is implementation specific in every CMSIS-RTOS.
+typedef struct os_pool_def  {
+  uint32_t                 pool_sz;    ///< number of items (elements) in the pool
+  uint32_t                 item_sz;    ///< size of an item
+  void                       *pool;    ///< pointer to memory for pool
+} osPoolDef_t;
+
+/// Definition structure for message queue.
+/// \note CAN BE CHANGED: \b os_messageQ_def is implementation specific in every CMSIS-RTOS.
+typedef struct os_messageQ_def  {
+  uint32_t                queue_sz;    ///< number of elements in the queue
+  void                       *pool;    ///< memory array for messages
+} osMessageQDef_t;
+
+/// Definition structure for mail queue.
+/// \note CAN BE CHANGED: \b os_mailQ_def is implementation specific in every CMSIS-RTOS.
+typedef struct os_mailQ_def  {
+  uint32_t                queue_sz;    ///< number of elements in the queue
+  uint32_t                 item_sz;    ///< size of an item
+  void                       *pool;    ///< memory array for mail
+} osMailQDef_t;
+
+/// Event structure contains detailed information about an event.
+/// \note MUST REMAIN UNCHANGED: \b os_event shall be consistent in every CMSIS-RTOS.
+///       However the struct may be extended at the end.
+typedef struct  {
+  osStatus                 status;     ///< status code: event or error information
+  union  {
+    uint32_t                    v;     ///< message as 32-bit value
+    void                       *p;     ///< message or mail as void pointer
+    int32_t               signals;     ///< signal flags
+  } value;                             ///< event value
+  union  {
+    osMailQId             mail_id;     ///< mail id obtained by \ref osMailCreate
+    osMessageQId       message_id;     ///< message id obtained by \ref osMessageCreate
+  } def;                               ///< event definition
+} osEvent;
+
+
+//  ==== Kernel Control Functions ====
+
+/// Initialize the RTOS Kernel for creating objects.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osKernelInitialize shall be consistent in every CMSIS-RTOS.
+osStatus osKernelInitialize (void);
+
+/// Start the RTOS Kernel.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osKernelStart shall be consistent in every CMSIS-RTOS.
+osStatus osKernelStart (void);
+
+/// Check if the RTOS kernel is already started.
+/// \note MUST REMAIN UNCHANGED: \b osKernelRunning shall be consistent in every CMSIS-RTOS.
+/// \return 0 RTOS is not started, 1 RTOS is started.
+int32_t osKernelRunning(void);
+
+#if (defined (osFeature_SysTick)  &&  (osFeature_SysTick != 0))     // System Timer available
+
+extern uint32_t const os_tickfreq;
+extern uint16_t const os_tickus_i;
+extern uint16_t const os_tickus_f;
+
+/// Get the RTOS kernel system timer counter.
+/// \note MUST REMAIN UNCHANGED: \b osKernelSysTick shall be consistent in every CMSIS-RTOS.
+/// \return RTOS kernel system timer as 32-bit value 
+uint32_t osKernelSysTick (void);
+
+/// The RTOS kernel system timer frequency in Hz.
+/// \note Reflects the system timer setting and is typically defined in a configuration file.
+#define osKernelSysTickFrequency os_tickfreq
+
+/// Convert a microseconds value to a RTOS kernel system timer value.
+/// \param         microsec     time value in microseconds.
+/// \return time value normalized to the \ref osKernelSysTickFrequency
+/*
+#define osKernelSysTickMicroSec(microsec) (((uint64_t)microsec * (osKernelSysTickFrequency)) / 1000000)
+*/
+#define osKernelSysTickMicroSec(microsec) ((microsec * os_tickus_i) + ((microsec * os_tickus_f) >> 16))
+
+#endif    // System Timer available
+
+//  ==== Thread Management ====
+
+/// Create a Thread Definition with function, priority, and stack requirements.
+/// \param         name         name of the thread function.
+/// \param         priority     initial priority of the thread function.
+/// \param         instances    number of possible thread instances.
+/// \param         stacksz      stack size (in bytes) requirements for the thread function.
+/// \note CAN BE CHANGED: The parameters to \b osThreadDef shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osThreadDef(name, priority, instances, stacksz)  \
+extern const osThreadDef_t os_thread_def_##name
+#else                            // define the object
+#ifdef __MBED_CMSIS_RTOS_CA9
+#define osThreadDef(name, priority, stacksz)  \
+uint32_t os_thread_def_stack_##name [stacksz / sizeof(uint32_t)]; \
+const osThreadDef_t os_thread_def_##name = \
+{ (name), (priority), 1, (stacksz), (os_thread_def_stack_##name) }
+#else
+#define osThreadDef(name, priority, instances, stacksz)  \
+const osThreadDef_t os_thread_def_##name = \
+{ (name), (priority), (instances), (stacksz)  }
+#endif
+#endif
+
+/// Access a Thread definition.
+/// \param         name          name of the thread definition object.
+/// \note CAN BE CHANGED: The parameter to \b osThread shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osThread(name)  \
+&os_thread_def_##name
+
+/// Create a thread and add it to Active Threads and set it to state READY.
+/// \param[in]     thread_def    thread definition referenced with \ref osThread.
+/// \param[in]     argument      pointer that is passed to the thread function as start argument.
+/// \return thread ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osThreadCreate shall be consistent in every CMSIS-RTOS.
+osThreadId osThreadCreate (const osThreadDef_t *thread_def, void *argument);
+
+/// Return the thread ID of the current running thread.
+/// \return thread ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osThreadGetId shall be consistent in every CMSIS-RTOS.
+osThreadId osThreadGetId (void);
+
+/// Terminate execution of a thread and remove it from Active Threads.
+/// \param[in]     thread_id   thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osThreadTerminate shall be consistent in every CMSIS-RTOS.
+osStatus osThreadTerminate (osThreadId thread_id);
+
+/// Pass control to next thread that is in state \b READY.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osThreadYield shall be consistent in every CMSIS-RTOS.
+osStatus osThreadYield (void);
+
+/// Change priority of an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \param[in]     priority      new priority value for the thread function.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osThreadSetPriority shall be consistent in every CMSIS-RTOS.
+osStatus osThreadSetPriority (osThreadId thread_id, osPriority priority);
+
+/// Get current priority of an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \return current priority value of the thread function.
+/// \note MUST REMAIN UNCHANGED: \b osThreadGetPriority shall be consistent in every CMSIS-RTOS.
+osPriority osThreadGetPriority (osThreadId thread_id);
+
+#ifdef __MBED_CMSIS_RTOS_CA9
+/// Get current thread state.
+uint8_t osThreadGetState (osThreadId thread_id);
+#endif
+
+/// Get into from an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \param[in]     info          information to read.
+/// \return current state of the thread function.
+/// \return requested info that includes the status code.
+os_InRegs osEvent _osThreadGetInfo(osThreadId thread_id, osThreadInfo info);
+
+//  ==== Generic Wait Functions ====
+
+/// Wait for Timeout (Time Delay).
+/// \param[in]     millisec      time delay value
+/// \return status code that indicates the execution status of the function.
+osStatus osDelay (uint32_t millisec);
+
+#if (defined (osFeature_Wait)  &&  (osFeature_Wait != 0))     // Generic Wait available
+
+/// Wait for Signal, Message, Mail, or Timeout.
+/// \param[in] millisec          timeout value or 0 in case of no time-out
+/// \return event that contains signal, message, or mail information or error code.
+/// \note MUST REMAIN UNCHANGED: \b osWait shall be consistent in every CMSIS-RTOS.
+os_InRegs osEvent osWait (uint32_t millisec);
+
+#endif  // Generic Wait available
+
+
+//  ==== Timer Management Functions ====
+/// Define a Timer object.
+/// \param         name          name of the timer object.
+/// \param         function      name of the timer call back function.
+/// \note CAN BE CHANGED: The parameter to \b osTimerDef shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osTimerDef(name, function)  \
+extern const osTimerDef_t os_timer_def_##name
+#else                            // define the object
+#define osTimerDef(name, function)  \
+uint32_t os_timer_cb_##name[5]; \
+const osTimerDef_t os_timer_def_##name = \
+{ (function), (os_timer_cb_##name) }
+#endif
+
+/// Access a Timer definition.
+/// \param         name          name of the timer object.
+/// \note CAN BE CHANGED: The parameter to \b osTimer shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osTimer(name) \
+&os_timer_def_##name
+
+/// Create a timer.
+/// \param[in]     timer_def     timer object referenced with \ref osTimer.
+/// \param[in]     type          osTimerOnce for one-shot or osTimerPeriodic for periodic behavior.
+/// \param[in]     argument      argument to the timer call back function.
+/// \return timer ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osTimerCreate shall be consistent in every CMSIS-RTOS.
+osTimerId osTimerCreate (const osTimerDef_t *timer_def, os_timer_type type, void *argument);
+
+/// Start or restart a timer.
+/// \param[in]     timer_id      timer ID obtained by \ref osTimerCreate.
+/// \param[in]     millisec      time delay value of the timer.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osTimerStart shall be consistent in every CMSIS-RTOS.
+osStatus osTimerStart (osTimerId timer_id, uint32_t millisec);
+
+/// Stop the timer.
+/// \param[in]     timer_id      timer ID obtained by \ref osTimerCreate.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osTimerStop shall be consistent in every CMSIS-RTOS.
+osStatus osTimerStop (osTimerId timer_id);
+
+/// Delete a timer that was created by \ref osTimerCreate.
+/// \param[in]     timer_id      timer ID obtained by \ref osTimerCreate.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osTimerDelete shall be consistent in every CMSIS-RTOS.
+osStatus osTimerDelete (osTimerId timer_id);
+
+
+//  ==== Signal Management ====
+
+/// Set the specified Signal Flags of an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \param[in]     signals       specifies the signal flags of the thread that should be set.
+/// \return previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters.
+/// \note MUST REMAIN UNCHANGED: \b osSignalSet shall be consistent in every CMSIS-RTOS.
+int32_t osSignalSet (osThreadId thread_id, int32_t signals);
+
+/// Clear the specified Signal Flags of an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \param[in]     signals       specifies the signal flags of the thread that shall be cleared.
+/// \return previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters.
+/// \note MUST REMAIN UNCHANGED: \b osSignalClear shall be consistent in every CMSIS-RTOS.
+int32_t osSignalClear (osThreadId thread_id, int32_t signals);
+
+/// Wait for one or more Signal Flags to become signaled for the current \b RUNNING thread.
+/// \param[in]     signals       wait until all specified signal flags set or 0 for any single signal flag.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out.
+/// \return event flag information or error code.
+/// \note MUST REMAIN UNCHANGED: \b osSignalWait shall be consistent in every CMSIS-RTOS.
+os_InRegs osEvent osSignalWait (int32_t signals, uint32_t millisec);
+
+
+//  ==== Mutex Management ====
+
+/// Define a Mutex.
+/// \param         name          name of the mutex object.
+/// \note CAN BE CHANGED: The parameter to \b osMutexDef shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osMutexDef(name)  \
+extern const osMutexDef_t os_mutex_def_##name
+#else                            // define the object
+#define osMutexDef(name)  \
+uint32_t os_mutex_cb_##name[4] = { 0 }; \
+const osMutexDef_t os_mutex_def_##name = { (os_mutex_cb_##name) }
+#endif
+
+/// Access a Mutex definition.
+/// \param         name          name of the mutex object.
+/// \note CAN BE CHANGED: The parameter to \b osMutex shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osMutex(name)  \
+&os_mutex_def_##name
+
+/// Create and Initialize a Mutex object.
+/// \param[in]     mutex_def     mutex definition referenced with \ref osMutex.
+/// \return mutex ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osMutexCreate shall be consistent in every CMSIS-RTOS.
+osMutexId osMutexCreate (const osMutexDef_t *mutex_def);
+
+/// Wait until a Mutex becomes available.
+/// \param[in]     mutex_id      mutex ID obtained by \ref osMutexCreate.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osMutexWait shall be consistent in every CMSIS-RTOS.
+osStatus osMutexWait (osMutexId mutex_id, uint32_t millisec);
+
+/// Release a Mutex that was obtained by \ref osMutexWait.
+/// \param[in]     mutex_id      mutex ID obtained by \ref osMutexCreate.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osMutexRelease shall be consistent in every CMSIS-RTOS.
+osStatus osMutexRelease (osMutexId mutex_id);
+
+/// Delete a Mutex that was created by \ref osMutexCreate.
+/// \param[in]     mutex_id      mutex ID obtained by \ref osMutexCreate.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osMutexDelete shall be consistent in every CMSIS-RTOS.
+osStatus osMutexDelete (osMutexId mutex_id);
+
+
+//  ==== Semaphore Management Functions ====
+
+#if (defined (osFeature_Semaphore)  &&  (osFeature_Semaphore != 0))     // Semaphore available
+
+/// Define a Semaphore object.
+/// \param         name          name of the semaphore object.
+/// \note CAN BE CHANGED: The parameter to \b osSemaphoreDef shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osSemaphoreDef(name)  \
+extern const osSemaphoreDef_t os_semaphore_def_##name
+#else                            // define the object
+#define osSemaphoreDef(name)  \
+uint32_t os_semaphore_cb_##name[2] = { 0 }; \
+const osSemaphoreDef_t os_semaphore_def_##name = { (os_semaphore_cb_##name) }
+#endif
+
+/// Access a Semaphore definition.
+/// \param         name          name of the semaphore object.
+/// \note CAN BE CHANGED: The parameter to \b osSemaphore shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osSemaphore(name)  \
+&os_semaphore_def_##name
+
+/// Create and Initialize a Semaphore object used for managing resources.
+/// \param[in]     semaphore_def semaphore definition referenced with \ref osSemaphore.
+/// \param[in]     count         number of available resources.
+/// \return semaphore ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osSemaphoreCreate shall be consistent in every CMSIS-RTOS.
+osSemaphoreId osSemaphoreCreate (const osSemaphoreDef_t *semaphore_def, int32_t count);
+
+/// Wait until a Semaphore token becomes available.
+/// \param[in]     semaphore_id  semaphore object referenced with \ref osSemaphoreCreate.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out.
+/// \return number of available tokens, or -1 in case of incorrect parameters.
+/// \note MUST REMAIN UNCHANGED: \b osSemaphoreWait shall be consistent in every CMSIS-RTOS.
+int32_t osSemaphoreWait (osSemaphoreId semaphore_id, uint32_t millisec);
+
+/// Release a Semaphore token.
+/// \param[in]     semaphore_id  semaphore object referenced with \ref osSemaphoreCreate.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osSemaphoreRelease shall be consistent in every CMSIS-RTOS.
+osStatus osSemaphoreRelease (osSemaphoreId semaphore_id);
+
+/// Delete a Semaphore that was created by \ref osSemaphoreCreate.
+/// \param[in]     semaphore_id  semaphore object referenced with \ref osSemaphoreCreate.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osSemaphoreDelete shall be consistent in every CMSIS-RTOS.
+osStatus osSemaphoreDelete (osSemaphoreId semaphore_id);
+
+#endif     // Semaphore available
+
+
+//  ==== Memory Pool Management Functions ====
+
+#if (defined (osFeature_Pool)  &&  (osFeature_Pool != 0))  // Memory Pool Management available
+
+/// \brief Define a Memory Pool.
+/// \param         name          name of the memory pool.
+/// \param         no            maximum number of blocks (objects) in the memory pool.
+/// \param         type          data type of a single block (object).
+/// \note CAN BE CHANGED: The parameter to \b osPoolDef shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osPoolDef(name, no, type)   \
+extern const osPoolDef_t os_pool_def_##name
+#else                            // define the object
+#define osPoolDef(name, no, type)   \
+uint32_t os_pool_m_##name[3+((sizeof(type)+3)/4)*(no)]; \
+const osPoolDef_t os_pool_def_##name = \
+{ (no), sizeof(type), (os_pool_m_##name) }
+#endif
+
+/// \brief Access a Memory Pool definition.
+/// \param         name          name of the memory pool
+/// \note CAN BE CHANGED: The parameter to \b osPool shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osPool(name) \
+&os_pool_def_##name
+
+/// Create and Initialize a memory pool.
+/// \param[in]     pool_def      memory pool definition referenced with \ref osPool.
+/// \return memory pool ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osPoolCreate shall be consistent in every CMSIS-RTOS.
+osPoolId osPoolCreate (const osPoolDef_t *pool_def);
+
+/// Allocate a memory block from a memory pool.
+/// \param[in]     pool_id       memory pool ID obtain referenced with \ref osPoolCreate.
+/// \return address of the allocated memory block or NULL in case of no memory available.
+/// \note MUST REMAIN UNCHANGED: \b osPoolAlloc shall be consistent in every CMSIS-RTOS.
+void *osPoolAlloc (osPoolId pool_id);
+
+/// Allocate a memory block from a memory pool and set memory block to zero.
+/// \param[in]     pool_id       memory pool ID obtain referenced with \ref osPoolCreate.
+/// \return address of the allocated memory block or NULL in case of no memory available.
+/// \note MUST REMAIN UNCHANGED: \b osPoolCAlloc shall be consistent in every CMSIS-RTOS.
+void *osPoolCAlloc (osPoolId pool_id);
+
+/// Return an allocated memory block back to a specific memory pool.
+/// \param[in]     pool_id       memory pool ID obtain referenced with \ref osPoolCreate.
+/// \param[in]     block         address of the allocated memory block that is returned to the memory pool.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osPoolFree shall be consistent in every CMSIS-RTOS.
+osStatus osPoolFree (osPoolId pool_id, void *block);
+
+#endif   // Memory Pool Management available
+
+
+//  ==== Message Queue Management Functions ====
+
+#if (defined (osFeature_MessageQ)  &&  (osFeature_MessageQ != 0))     // Message Queues available
+
+/// \brief Create a Message Queue Definition.
+/// \param         name          name of the queue.
+/// \param         queue_sz      maximum number of messages in the queue.
+/// \param         type          data type of a single message element (for debugger).
+/// \note CAN BE CHANGED: The parameter to \b osMessageQDef shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osMessageQDef(name, queue_sz, type)   \
+extern const osMessageQDef_t os_messageQ_def_##name
+#else                            // define the object
+#define osMessageQDef(name, queue_sz, type)   \
+uint32_t os_messageQ_q_##name[4+(queue_sz)] = { 0 }; \
+const osMessageQDef_t os_messageQ_def_##name = \
+{ (queue_sz), (os_messageQ_q_##name) }
+#endif
+
+/// \brief Access a Message Queue Definition.
+/// \param         name          name of the queue
+/// \note CAN BE CHANGED: The parameter to \b osMessageQ shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osMessageQ(name) \
+&os_messageQ_def_##name
+
+/// Create and Initialize a Message Queue.
+/// \param[in]     queue_def     queue definition referenced with \ref osMessageQ.
+/// \param[in]     thread_id     thread ID (obtained by \ref osThreadCreate or \ref osThreadGetId) or NULL.
+/// \return message queue ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osMessageCreate shall be consistent in every CMSIS-RTOS.
+osMessageQId osMessageCreate (const osMessageQDef_t *queue_def, osThreadId thread_id);
+
+/// Put a Message to a Queue.
+/// \param[in]     queue_id      message queue ID obtained with \ref osMessageCreate.
+/// \param[in]     info          message information.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osMessagePut shall be consistent in every CMSIS-RTOS.
+osStatus osMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec);
+
+/// Get a Message or Wait for a Message from a Queue.
+/// \param[in]     queue_id      message queue ID obtained with \ref osMessageCreate.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out.
+/// \return event information that includes status code.
+/// \note MUST REMAIN UNCHANGED: \b osMessageGet shall be consistent in every CMSIS-RTOS.
+os_InRegs osEvent osMessageGet (osMessageQId queue_id, uint32_t millisec);
+
+#endif     // Message Queues available
+
+
+//  ==== Mail Queue Management Functions ====
+
+#if (defined (osFeature_MailQ)  &&  (osFeature_MailQ != 0))     // Mail Queues available
+
+/// \brief Create a Mail Queue Definition.
+/// \param         name          name of the queue
+/// \param         queue_sz      maximum number of messages in queue
+/// \param         type          data type of a single message element
+/// \note CAN BE CHANGED: The parameter to \b osMailQDef shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osMailQDef(name, queue_sz, type) \
+extern const osMailQDef_t os_mailQ_def_##name
+#else                            // define the object
+#define osMailQDef(name, queue_sz, type) \
+uint32_t os_mailQ_q_##name[4+(queue_sz)] = { 0 }; \
+uint32_t os_mailQ_m_##name[3+((sizeof(type)+3)/4)*(queue_sz)]; \
+void *   os_mailQ_p_##name[2] = { (os_mailQ_q_##name), os_mailQ_m_##name }; \
+const osMailQDef_t os_mailQ_def_##name =  \
+{ (queue_sz), sizeof(type), (os_mailQ_p_##name) }
+#endif
+
+/// \brief Access a Mail Queue Definition.
+/// \param         name          name of the queue
+/// \note CAN BE CHANGED: The parameter to \b osMailQ shall be consistent but the
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osMailQ(name)  \
+&os_mailQ_def_##name
+
+/// Create and Initialize mail queue.
+/// \param[in]     queue_def     reference to the mail queue definition obtain with \ref osMailQ
+/// \param[in]     thread_id     thread ID (obtained by \ref osThreadCreate or \ref osThreadGetId) or NULL.
+/// \return mail queue ID for reference by other functions or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osMailCreate shall be consistent in every CMSIS-RTOS.
+osMailQId osMailCreate (const osMailQDef_t *queue_def, osThreadId thread_id);
+
+/// Allocate a memory block from a mail.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out
+/// \return pointer to memory block that can be filled with mail or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osMailAlloc shall be consistent in every CMSIS-RTOS.
+void *osMailAlloc (osMailQId queue_id, uint32_t millisec);
+
+/// Allocate a memory block from a mail and set memory block to zero.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out
+/// \return pointer to memory block that can be filled with mail or NULL in case of error.
+/// \note MUST REMAIN UNCHANGED: \b osMailCAlloc shall be consistent in every CMSIS-RTOS.
+void *osMailCAlloc (osMailQId queue_id, uint32_t millisec);
+
+/// Put a mail to a queue.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     mail          memory block previously allocated with \ref osMailAlloc or \ref osMailCAlloc.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osMailPut shall be consistent in every CMSIS-RTOS.
+osStatus osMailPut (osMailQId queue_id, void *mail);
+
+/// Get a mail from a queue.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     millisec      timeout value or 0 in case of no time-out
+/// \return event that contains mail information or error code.
+/// \note MUST REMAIN UNCHANGED: \b osMailGet shall be consistent in every CMSIS-RTOS.
+os_InRegs osEvent osMailGet (osMailQId queue_id, uint32_t millisec);
+
+/// Free a memory block from a mail.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     mail          pointer to the memory block that was obtained with \ref osMailGet.
+/// \return status code that indicates the execution status of the function.
+/// \note MUST REMAIN UNCHANGED: \b osMailFree shall be consistent in every CMSIS-RTOS.
+osStatus osMailFree (osMailQId queue_id, void *mail);
+
+#endif  // Mail Queues available
+
+
+//  ==== Thread Enumeration Functions ====
+
+#if (defined (osFeature_ThreadEnum)  &&  (osFeature_ThreadEnum != 0))     // Thread enumeration available
+
+/// Start a thread enumeration.
+/// \return an enumeration ID or NULL on error.
+osThreadEnumId _osThreadsEnumStart(void);
+
+/// Get the next task ID in the enumeration.
+/// \return a thread ID or NULL on if the end of the enumeration has been reached.
+osThreadId _osThreadEnumNext(osThreadEnumId enum_id);
+
+/// Free the enumeration structure.
+/// \param[in]     enum_id       pointer to the enumeration ID that was obtained with \ref _osThreadsEnumStart.
+/// \return status code that indicates the execution status of the function.
+osStatus _osThreadEnumFree(osThreadEnumId enum_id);
+
+#endif  // Thread Enumeration available
+
+
+//  ==== RTX Extensions ====
+
+/// os_suspend: http://www.keil.com/support/man/docs/rlarm/rlarm_os_suspend.htm
+uint32_t os_suspend (void);
+
+/// os_resume: http://www.keil.com/support/man/docs/rlarm/rlarm_os_resume.htm
+void os_resume (uint32_t sleep_time);
+
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif  // _CMSIS_OS_H
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_CMSIS.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_CMSIS.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,2332 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    rt_CMSIS.c
+ *      Purpose: CMSIS RTOS API
+ *      Rev.:    V4.74
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#define __CMSIS_GENERIC
+
+#if defined (__CORTEX_M4) || defined (__CORTEX_M4F)
+  #include "core_cm4.h"
+#elif defined (__CORTEX_M3)
+  #include "core_cm3.h"
+#elif defined (__CORTEX_M0)
+  #include "core_cm0.h"
+#elif defined (__CORTEX_A9)
+  #include "core_ca9.h"
+#else
+  #error "Missing __CORTEX_xx definition"
+#endif
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_Task.h"
+#include "rt_Event.h"
+#include "rt_List.h"
+#include "rt_Time.h"
+#include "rt_Mutex.h"
+#include "rt_Semaphore.h"
+#include "rt_Mailbox.h"
+#include "rt_MemBox.h"
+#include "rt_Memory.h"
+#include "rt_HAL_CM.h"
+
+#define os_thread_cb OS_TCB
+
+#include "cmsis_os.h"
+
+#if (osFeature_Signals != 16)
+#error Invalid "osFeature_Signals" value!
+#endif
+#if (osFeature_Semaphore > 65535)
+#error Invalid "osFeature_Semaphore" value!
+#endif
+#if (osFeature_Wait != 0)
+#error osWait not supported!
+#endif
+
+
+// ==== Enumeration, structures, defines ====
+
+// Service Calls defines
+
+#if defined (__CC_ARM)          /* ARM Compiler */
+
+#define __NO_RETURN __declspec(noreturn)
+
+#define osEvent_type       osEvent
+#define osEvent_ret_status ret
+#define osEvent_ret_value  ret
+#define osEvent_ret_msg    ret
+#define osEvent_ret_mail   ret
+
+#define osCallback_type    osCallback
+#define osCallback_ret     ret
+
+#define SVC_0_1(f,t,...)                                                       \
+__svc_indirect(0) t  _##f (t(*)());                                            \
+                  t     f (void);                                              \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (void) {                                             \
+  return _##f(f);                                                              \
+}
+
+#define SVC_1_0(f,t,t1,...)                                                    \
+__svc_indirect(0) t  _##f (t(*)(t1),t1);                                       \
+                  t     f (t1 a1);                                             \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (t1 a1) {                                            \
+  _##f(f,a1);                                                                  \
+}
+
+#define SVC_1_1(f,t,t1,...)                                                    \
+__svc_indirect(0) t  _##f (t(*)(t1),t1);                                       \
+                  t     f (t1 a1);                                             \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (t1 a1) {                                            \
+  return _##f(f,a1);                                                           \
+}
+
+#define SVC_2_1(f,t,t1,t2,...)                                                 \
+__svc_indirect(0) t  _##f (t(*)(t1,t2),t1,t2);                                 \
+                  t     f (t1 a1, t2 a2);                                      \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (t1 a1, t2 a2) {                                     \
+  return _##f(f,a1,a2);                                                        \
+}
+
+#define SVC_3_1(f,t,t1,t2,t3,...)                                              \
+__svc_indirect(0) t  _##f (t(*)(t1,t2,t3),t1,t2,t3);                           \
+                  t     f (t1 a1, t2 a2, t3 a3);                               \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (t1 a1, t2 a2, t3 a3) {                              \
+  return _##f(f,a1,a2,a3);                                                     \
+}
+
+#define SVC_4_1(f,t,t1,t2,t3,t4,...)                                           \
+__svc_indirect(0) t  _##f (t(*)(t1,t2,t3,t4),t1,t2,t3,t4);                     \
+                  t     f (t1 a1, t2 a2, t3 a3, t4 a4);                        \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (t1 a1, t2 a2, t3 a3, t4 a4) {                       \
+  return _##f(f,a1,a2,a3,a4);                                                  \
+}
+
+#define SVC_1_2 SVC_1_1
+#define SVC_1_3 SVC_1_1
+#define SVC_2_3 SVC_2_1
+
+#elif defined (__GNUC__)        /* GNU Compiler */
+
+#define __NO_RETURN __attribute__((noreturn))
+
+typedef uint32_t __attribute__((vector_size(8)))  ret64;
+typedef uint32_t __attribute__((vector_size(16))) ret128;
+
+#define RET_pointer    __r0
+#define RET_int32_t    __r0
+#define RET_uint32_t   __r0
+#define RET_osStatus   __r0
+#define RET_osPriority __r0
+#define RET_osEvent    {(osStatus)__r0, {(uint32_t)__r1}, {(void *)__r2}}
+#define RET_osCallback {(void *)__r0, (void *)__r1}
+
+#if defined (__ARM_PCS_VFP)
+
+#define osEvent_type        void
+#define osEvent_ret_status {  __asm ("MOV r0, %0;"      \
+                                     : /* no outputs */ \
+                                     : "r"(ret.status)  \
+                                     : "r0"             \
+                                     );                 \
+                           }
+#define osEvent_ret_value  {  __asm ("MOV r1, %0;"         \
+                                     "MOV r0, %1;"         \
+                                     :   /* no outputs */  \
+                                     :   "r"(ret.value.v), \
+                                         "r"(ret.status)   \
+                                     : "r0", "r1"          \
+                                     );                    \
+                           }
+#define osEvent_ret_msg    {  __asm ("MOV r2, %0;"                \
+                                     "MOV r1, %1;"                \
+                                     "MOV r0, %2;"                \
+                                     : /* no outputs */           \
+                                     :   "r"(ret.def.message_id), \
+                                         "r"(ret.value.v),        \
+                                         "r"(ret.status)          \
+                                     : "r0", "r1" , "r2"          \
+                                     );                           \
+                           }
+
+#define osEvent_ret_mail   {  __asm ("MOV r2, %0;"             \
+                                     "MOV r1, %1;"             \
+                                     "MOV r0, %2;"             \
+                                     : /* no outputs */        \
+                                     :   "r"(ret.def.mail_id), \
+                                         "r"(ret.value.v),     \
+                                         "r"(ret.status)       \
+                                     : "r0", "r1" , "r2"       \
+                                     );                        \
+                           }
+
+#define osCallback_type     void
+#define osCallback_ret     {  __asm ("MOV r1, %0;"      \
+                                     "MOV r0, %1;"      \
+                                     : /* no outputs */ \
+                                     : "r"(ret.arg),    \
+                                       "r"(ret.fp)      \
+                                     : "r0", "r1"       \
+                                     );                 \
+                           }
+
+#else /* defined (__ARM_PCS_VFP) */
+
+#define osEvent_type        ret128
+#define osEvent_ret_status (ret128){ret.status}
+#define osEvent_ret_value  (ret128){ret.status, ret.value.v}
+#define osEvent_ret_msg    (ret128){ret.status, ret.value.v, (uint32_t)ret.def.message_id}
+#define osEvent_ret_mail   (ret128){ret.status, ret.value.v, (uint32_t)ret.def.mail_id}
+
+#define osCallback_type     ret64
+#define osCallback_ret     (ret64) {(uint32_t)ret.fp, (uint32_t)ret.arg}
+
+#endif /* defined (__ARM_PCS_VFP) */
+
+#define SVC_ArgN(n) \
+  register int __r##n __asm("r"#n);
+
+#define SVC_ArgR(n,t,a) \
+  register t   __r##n __asm("r"#n) = a;
+
+#define SVC_Arg0()                                                             \
+  SVC_ArgN(0)                                                                  \
+  SVC_ArgN(1)                                                                  \
+  SVC_ArgN(2)                                                                  \
+  SVC_ArgN(3)
+
+#define SVC_Arg1(t1)                                                           \
+  SVC_ArgR(0,t1,a1)                                                            \
+  SVC_ArgN(1)                                                                  \
+  SVC_ArgN(2)                                                                  \
+  SVC_ArgN(3)
+
+#define SVC_Arg2(t1,t2)                                                        \
+  SVC_ArgR(0,t1,a1)                                                            \
+  SVC_ArgR(1,t2,a2)                                                            \
+  SVC_ArgN(2)                                                                  \
+  SVC_ArgN(3)
+
+#define SVC_Arg3(t1,t2,t3)                                                     \
+  SVC_ArgR(0,t1,a1)                                                            \
+  SVC_ArgR(1,t2,a2)                                                            \
+  SVC_ArgR(2,t3,a3)                                                            \
+  SVC_ArgN(3)
+
+#define SVC_Arg4(t1,t2,t3,t4)                                                  \
+  SVC_ArgR(0,t1,a1)                                                            \
+  SVC_ArgR(1,t2,a2)                                                            \
+  SVC_ArgR(2,t3,a3)                                                            \
+  SVC_ArgR(3,t4,a4)
+
+#if (defined (__CORTEX_M0))
+#define SVC_Call(f)                                                            \
+  __asm volatile                                                                 \
+  (                                                                            \
+    "ldr r7,="#f"\n\t"                                                         \
+    "mov r12,r7\n\t"                                                           \
+    "svc 0"                                                                    \
+    :               "=r" (__r0), "=r" (__r1), "=r" (__r2), "=r" (__r3)         \
+    :                "r" (__r0),  "r" (__r1),  "r" (__r2),  "r" (__r3)         \
+    : "r7", "r12", "lr", "cc"                                                  \
+  );
+#else
+#define SVC_Call(f)                                                            \
+  __asm volatile                                                                 \
+  (                                                                            \
+    "ldr r12,="#f"\n\t"                                                        \
+    "svc 0"                                                                    \
+    :               "=r" (__r0), "=r" (__r1), "=r" (__r2), "=r" (__r3)         \
+    :                "r" (__r0),  "r" (__r1),  "r" (__r2),  "r" (__r3)         \
+    : "r12", "lr", "cc"                                                        \
+  );
+#endif
+
+#define SVC_0_1(f,t,rv)                                                        \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (void) {                                                \
+  SVC_Arg0();                                                                  \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_1_0(f,t,t1)                                                        \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (t1 a1) {                                               \
+  SVC_Arg1(t1);                                                                \
+  SVC_Call(f);                                                                 \
+}
+
+#define SVC_1_1(f,t,t1,rv)                                                     \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (t1 a1) {                                               \
+  SVC_Arg1(t1);                                                                \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_2_1(f,t,t1,t2,rv)                                                  \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (t1 a1, t2 a2) {                                        \
+  SVC_Arg2(t1,t2);                                                             \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_3_1(f,t,t1,t2,t3,rv)                                               \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (t1 a1, t2 a2, t3 a3) {                                 \
+  SVC_Arg3(t1,t2,t3);                                                          \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_4_1(f,t,t1,t2,t3,t4,rv)                                            \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (t1 a1, t2 a2, t3 a3, t4 a4) {                          \
+  SVC_Arg4(t1,t2,t3,t4);                                                       \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_1_2 SVC_1_1
+#define SVC_1_3 SVC_1_1
+#define SVC_2_3 SVC_2_1
+
+#elif defined (__ICCARM__)      /* IAR Compiler */
+
+#define __NO_RETURN __noreturn
+
+#define RET_osEvent        "=r"(ret.status), "=r"(ret.value), "=r"(ret.def)
+#define RET_osCallback     "=r"(ret.fp), "=r"(ret.arg)
+
+#define osEvent_type       osEvent
+#define osEvent_ret_status ret
+#define osEvent_ret_value  ret
+#define osEvent_ret_msg    ret
+#define osEvent_ret_mail   ret
+
+#define osCallback_type    uint64_t
+#define osCallback_ret     ((uint64_t)ret.fp | ((uint64_t)ret.arg)<<32)
+
+#define SVC_Setup(f)                                                           \
+  __asm(                                                                         \
+    "mov r12,%0\n"                                                             \
+    :: "r"(&f): "r12"                                                          \
+  );
+
+#define SVC_Ret3()                                                             \
+  __asm(                                                                         \
+    "ldr r0,[sp,#0]\n"                                                         \
+    "ldr r1,[sp,#4]\n"                                                         \
+    "ldr r2,[sp,#8]\n"                                                         \
+  );
+
+#define SVC_0_1(f,t,...)                                                       \
+t f (void);                                                                    \
+_Pragma("swi_number=0") __swi t _##f (void);                                   \
+static inline t __##f (void) {                                                 \
+  SVC_Setup(f);                                                                \
+  return _##f();                                                               \
+}
+
+#define SVC_1_0(f,t,t1,...)                                                    \
+t f (t1 a1);                                                                   \
+_Pragma("swi_number=0") __swi t _##f (t1 a1);                                  \
+static inline t __##f (t1 a1) {                                                \
+  SVC_Setup(f);                                                                \
+  _##f(a1);                                                                    \
+}
+
+#define SVC_1_1(f,t,t1,...)                                                    \
+t f (t1 a1);                                                                   \
+_Pragma("swi_number=0") __swi t _##f (t1 a1);                                  \
+static inline t __##f (t1 a1) {                                                \
+  SVC_Setup(f);                                                                \
+  return _##f(a1);                                                             \
+}
+
+#define SVC_2_1(f,t,t1,t2,...)                                                 \
+t f (t1 a1, t2 a2);                                                            \
+_Pragma("swi_number=0") __swi t _##f (t1 a1, t2 a2);                           \
+static inline t __##f (t1 a1, t2 a2) {                                         \
+  SVC_Setup(f);                                                                \
+  return _##f(a1,a2);                                                          \
+}
+
+#define SVC_3_1(f,t,t1,t2,t3,...)                                              \
+t f (t1 a1, t2 a2, t3 a3);                                                     \
+_Pragma("swi_number=0") __swi t _##f (t1 a1, t2 a2, t3 a3);                    \
+static inline t __##f (t1 a1, t2 a2, t3 a3) {                                  \
+  SVC_Setup(f);                                                                \
+  return _##f(a1,a2,a3);                                                       \
+}
+
+#define SVC_4_1(f,t,t1,t2,t3,t4,...)                                           \
+t f (t1 a1, t2 a2, t3 a3, t4 a4);                                              \
+_Pragma("swi_number=0") __swi t _##f (t1 a1, t2 a2, t3 a3, t4 a4);             \
+static inline t __##f (t1 a1, t2 a2, t3 a3, t4 a4) {                           \
+  SVC_Setup(f);                                                                \
+  return _##f(a1,a2,a3,a4);                                                    \
+}
+
+#define SVC_1_2(f,t,t1,rr)                                                     \
+uint64_t f (t1 a1);                                                            \
+_Pragma("swi_number=0") __swi uint64_t _##f (t1 a1);                           \
+static inline t __##f (t1 a1) {                                                \
+  t ret;                                                                       \
+  SVC_Setup(f);                                                                \
+  _##f(a1);                                                                    \
+  __asm("" : rr : :);                                                            \
+  return ret;                                                                  \
+}
+
+#define SVC_1_3(f,t,t1,rr)                                                     \
+t f (t1 a1);                                                                   \
+void f##_ (t1 a1) {                                                            \
+  f(a1);                                                                       \
+  SVC_Ret3();                                                                  \
+}                                                                              \
+_Pragma("swi_number=0") __swi void _##f (t1 a1);                               \
+static inline t __##f (t1 a1) {                                                \
+  t ret;                                                                       \
+  SVC_Setup(f##_);                                                             \
+  _##f(a1);                                                                    \
+  __asm("" : rr : :);                                                            \
+  return ret;                                                                  \
+}
+
+#define SVC_2_3(f,t,t1,t2,rr)                                                  \
+t f (t1 a1, t2 a2);                                                            \
+void f##_ (t1 a1, t2 a2) {                                                     \
+  f(a1,a2);                                                                    \
+  SVC_Ret3();                                                                  \
+}                                                                              \
+_Pragma("swi_number=0") __swi void _##f (t1 a1, t2 a2);                        \
+static inline t __##f (t1 a1, t2 a2) {                                         \
+  t ret;                                                                       \
+  SVC_Setup(f##_);                                                             \
+  _##f(a1,a2);                                                                 \
+  __asm("" : rr : :);                                                            \
+  return ret;                                                                  \
+}
+
+#endif
+
+
+// Callback structure
+typedef struct {
+  void *fp;             // Function pointer
+  void *arg;            // Function argument
+} osCallback;
+
+
+// OS Section definitions
+#ifdef OS_SECTIONS_LINK_INFO
+extern const uint32_t  os_section_id$$Base;
+extern const uint32_t  os_section_id$$Limit;
+#endif
+
+#ifndef __MBED_CMSIS_RTOS_CA9
+// OS Stack Memory for Threads definitions
+extern       uint64_t  os_stack_mem[];
+extern const uint32_t  os_stack_sz;
+#endif
+
+// OS Timers external resources
+extern const osThreadDef_t   os_thread_def_osTimerThread;
+extern       osThreadId      osThreadId_osTimerThread;
+extern const osMessageQDef_t os_messageQ_def_osTimerMessageQ;
+extern       osMessageQId    osMessageQId_osTimerMessageQ;
+
+extern U32 IRQNestLevel; /* Indicates whether inside an ISR, and the depth of nesting.  0 = not in ISR. */
+
+// Thread creation and destruction
+osMutexDef(osThreadMutex);
+osMutexId osMutexId_osThreadMutex;
+void sysThreadTerminate(osThreadId id);
+
+// ==== Helper Functions ====
+
+/// Convert timeout in millisec to system ticks
+static uint32_t rt_ms2tick (uint32_t millisec) {
+  uint32_t tick;
+
+  if (millisec == osWaitForever) return 0xFFFF; // Indefinite timeout
+  if (millisec > 4000000) return 0xFFFE;        // Max ticks supported
+
+  tick = ((1000 * millisec) + os_clockrate - 1)  / os_clockrate;
+  if (tick > 0xFFFE) return 0xFFFE;
+
+  return tick;
+}
+
+/// Convert Thread ID to TCB pointer
+static P_TCB rt_tid2ptcb (osThreadId thread_id) {
+  P_TCB ptcb;
+
+  if (thread_id == NULL) return NULL;
+
+  if ((uint32_t)thread_id & 3) return NULL;
+
+#ifdef OS_SECTIONS_LINK_INFO
+  if ((os_section_id$$Base != 0) && (os_section_id$$Limit != 0)) {
+    if (thread_id  < (osThreadId)os_section_id$$Base)  return NULL;
+    if (thread_id >= (osThreadId)os_section_id$$Limit) return NULL;
+  }
+#endif
+
+  ptcb = thread_id;
+
+  if (ptcb->cb_type != TCB) return NULL;
+
+  return ptcb;
+}
+
+/// Convert ID pointer to Object pointer
+static void *rt_id2obj (void *id) {
+
+  if ((uint32_t)id & 3) return NULL;
+
+#ifdef OS_SECTIONS_LINK_INFO
+  if ((os_section_id$$Base != 0) && (os_section_id$$Limit != 0)) {
+    if (id  < (void *)os_section_id$$Base)  return NULL;
+    if (id >= (void *)os_section_id$$Limit) return NULL;
+  }
+#endif
+
+  return id;
+}
+
+// === Helper functions for system call interface ===
+
+static __inline char __get_mode(void) {
+    return (char)(__get_CPSR() & 0x1f);
+}
+
+static __inline char __exceptional_mode(void) {
+    // Interrupts disabled
+    if (__get_CPSR() & 0x80) {
+        return 1;
+    }
+
+    switch(__get_mode()) {
+        case MODE_USR:
+        case MODE_SYS:
+            return 0;
+        case MODE_SVC:
+            if (IRQNestLevel == 0)
+                return 0; /* handling a regular service call */
+            else
+                return 1; /* handling an ISR in SVC mode */
+        default:
+            return 1;
+    }
+}
+
+// ==== Kernel Control ====
+
+uint8_t os_initialized;                         // Kernel Initialized flag
+uint8_t os_running;                             // Kernel Running flag
+
+// Kernel Control Service Calls declarations
+SVC_0_1(svcKernelInitialize, osStatus, RET_osStatus)
+SVC_0_1(svcKernelStart,      osStatus, RET_osStatus)
+SVC_0_1(svcKernelRunning,    int32_t,  RET_int32_t)
+SVC_0_1(svcKernelSysTick,    uint32_t, RET_uint32_t)
+
+static void  sysThreadError   (osStatus status);
+osThreadId   svcThreadCreate  (const osThreadDef_t *thread_def, void *argument);
+osMessageQId svcMessageCreate (const osMessageQDef_t *queue_def, osThreadId thread_id);
+
+// Kernel Control Service Calls
+
+/// Initialize the RTOS Kernel for creating objects
+osStatus svcKernelInitialize (void) {
+#ifdef __MBED_CMSIS_RTOS_CA9
+  if (!os_initialized) {
+    rt_sys_init();                              // RTX System Initialization
+  }
+#else
+  int ret;
+
+  if (!os_initialized) {
+
+    // Init Thread Stack Memory (must be 8-byte aligned)
+    if ((uint32_t)os_stack_mem & 7) return osErrorNoMemory;
+    ret = rt_init_mem(os_stack_mem, os_stack_sz);
+    if (ret != 0) return osErrorNoMemory;
+
+    rt_sys_init();                              // RTX System Initialization
+  }
+#endif
+
+  os_tsk.run->prio = 255;                       // Highest priority
+
+  if (!os_initialized) {
+    // Create OS Timers resources (Message Queue & Thread)
+    osMessageQId_osTimerMessageQ = svcMessageCreate (&os_messageQ_def_osTimerMessageQ, NULL);
+    osThreadId_osTimerThread = svcThreadCreate(&os_thread_def_osTimerThread, NULL);
+    // Initialize thread mutex
+    osMutexId_osThreadMutex = osMutexCreate(osMutex(osThreadMutex));
+  }
+
+  sysThreadError(osOK);
+
+  os_initialized = 1;
+  os_running = 0;
+
+  return osOK;
+}
+
+/// Start the RTOS Kernel
+osStatus svcKernelStart (void) {
+
+  if (os_running) return osOK;
+
+  rt_tsk_prio(0, os_tsk.run->prio_base);        // Restore priority
+  if (os_tsk.run->task_id == 0xFF) {            // Idle Thread
+    __set_PSP(os_tsk.run->tsk_stack + 8*4);     // Setup PSP
+  }
+  os_tsk.run = NULL;                            // Force context switch
+
+  rt_sys_start();
+
+  os_running = 1;
+
+  return osOK;
+}
+
+/// Check if the RTOS kernel is already started
+int32_t svcKernelRunning(void) {
+  return os_running;
+}
+
+/// Get the RTOS kernel system timer counter
+uint32_t svcKernelSysTick (void) {
+  uint32_t tick, tick0;
+
+  tick = os_tick_val();
+  if (os_tick_ovf()) {
+    tick0 = os_tick_val();
+    if (tick0 < tick) tick = tick0;
+    tick += (os_trv + 1) * (os_time + 1);
+  } else {
+    tick += (os_trv + 1) *  os_time;
+  }
+
+  return tick;
+}
+
+// Kernel Control Public API
+
+/// Initialize the RTOS Kernel for creating objects
+osStatus osKernelInitialize (void) {
+  if (__exceptional_mode()) return osErrorISR;     // Not allowed in ISR
+  if (__get_mode() != MODE_USR) {
+    return   svcKernelInitialize();
+  } else {
+    return __svcKernelInitialize();
+  }
+}
+
+/// Start the RTOS Kernel
+osStatus osKernelStart (void) {
+  char mode = __get_mode();
+
+  switch(mode) {
+    case MODE_USR:
+      if (os_flags & 1) return osErrorOS;  // Privileged Thread mode requested from Unprivileged
+      break;
+    case MODE_SYS:
+      if (!(os_flags & 1)) {
+        __set_CPS_USR();
+      }
+      break;
+    default:
+      return osErrorISR;                   // Not allowed in ISR
+  }
+  return __svcKernelStart();
+}
+
+/// Check if the RTOS kernel is already started
+int32_t osKernelRunning(void) {
+  if(__get_mode() != MODE_USR) {
+    return os_running;
+  } else {
+    return __svcKernelRunning();
+  }
+}
+
+/// Get the RTOS kernel system timer counter
+uint32_t osKernelSysTick (void) {
+  if (__exceptional_mode()) return 0;              // Not allowed in ISR
+  return __svcKernelSysTick();
+}
+
+
+// ==== Thread Management ====
+
+/// Set Thread Error (for Create functions which return IDs)
+static void sysThreadError (osStatus status) {
+  // To Do
+}
+
+__NO_RETURN void osThreadExit (void);
+
+// Thread Service Calls declarations
+SVC_2_1(svcThreadCreate,      osThreadId, const osThreadDef_t *, void *,     RET_pointer)
+SVC_0_1(svcThreadGetId,       osThreadId,                                    RET_pointer)
+SVC_1_1(svcThreadTerminate,   osStatus,         osThreadId,                  RET_osStatus)
+SVC_0_1(svcThreadYield,       osStatus,                                      RET_osStatus)
+SVC_2_1(svcThreadSetPriority, osStatus,         osThreadId,      osPriority, RET_osStatus)
+SVC_1_1(svcThreadGetPriority, osPriority,       osThreadId,                  RET_osPriority)
+SVC_2_3(svcThreadGetInfo,    os_InRegs osEvent, osThreadId,    osThreadInfo, RET_osEvent)
+
+// Thread Service Calls
+
+/// Create a thread and add it to Active Threads and set it to state READY
+osThreadId svcThreadCreate (const osThreadDef_t *thread_def, void *argument) {
+  P_TCB  ptcb;
+  OS_TID tsk;
+  void  *stk;
+
+  if ((thread_def == NULL) ||
+      (thread_def->pthread == NULL) ||
+      (thread_def->tpriority < osPriorityIdle) ||
+      (thread_def->tpriority > osPriorityRealtime)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+#ifdef __MBED_CMSIS_RTOS_CA9
+  if (thread_def->stacksize != 0) {             // Custom stack size
+    stk = (void *)thread_def->stack_pointer;
+  } else {                                      // Default stack size
+    stk = NULL;
+  }
+#else
+  if (thread_def->stacksize != 0) {             // Custom stack size
+    stk = rt_alloc_mem(                         // Allocate stack
+      os_stack_mem,
+      thread_def->stacksize
+    );
+    if (stk == NULL) {
+      sysThreadError(osErrorNoMemory);          // Out of memory
+      return NULL;
+    }
+  } else {                                      // Default stack size
+    stk = NULL;
+  }
+#endif
+
+  tsk = rt_tsk_create(                          // Create task
+    (FUNCP)thread_def->pthread,                 // Task function pointer
+    (thread_def->tpriority-osPriorityIdle+1) |  // Task priority
+    (thread_def->stacksize << 8),               // Task stack size in bytes
+    stk,                                        // Pointer to task's stack
+    argument                                    // Argument to the task
+  );
+
+  if (tsk == 0) {                               // Invalid task ID
+#ifndef __MBED_CMSIS_RTOS_CA9
+    if (stk != NULL) {
+      rt_free_mem(os_stack_mem, stk);           // Free allocated stack
+    }
+#endif
+    sysThreadError(osErrorNoMemory);            // Create task failed (Out of memory)
+    return NULL;
+  }
+
+  ptcb = (P_TCB)os_active_TCB[tsk - 1];         // TCB pointer
+
+  *((uint32_t *)ptcb->tsk_stack + 13) = (uint32_t)osThreadExit;
+
+  return ptcb;
+}
+
+/// Return the thread ID of the current running thread
+osThreadId svcThreadGetId (void) {
+  OS_TID tsk;
+
+  tsk = rt_tsk_self();
+  if (tsk == 0) return NULL;
+  return (P_TCB)os_active_TCB[tsk - 1];
+}
+
+/// Terminate execution of a thread and remove it from ActiveThreads
+osStatus svcThreadTerminate (osThreadId thread_id) {
+  OS_RESULT res;
+  P_TCB     ptcb;
+#ifndef __MBED_CMSIS_RTOS_CA9
+  void     *stk;
+#endif
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return osErrorParameter;
+
+#ifndef __MBED_CMSIS_RTOS_CA9
+  stk = ptcb->priv_stack ? ptcb->stack : NULL;  // Private stack
+#endif
+
+  res = rt_tsk_delete(ptcb->task_id);           // Delete task
+
+  if (res == OS_R_NOK) return osErrorResource;  // Delete task failed
+
+#ifndef __MBED_CMSIS_RTOS_CA9
+  if (stk != NULL) {
+    rt_free_mem(os_stack_mem, stk);             // Free private stack
+  }
+#endif
+
+  return osOK;
+}
+
+/// Pass control to next thread that is in state READY
+osStatus svcThreadYield (void) {
+  rt_tsk_pass();                                // Pass control to next task
+  return osOK;
+}
+
+/// Change priority of an active thread
+osStatus svcThreadSetPriority (osThreadId thread_id, osPriority priority) {
+  OS_RESULT res;
+  P_TCB     ptcb;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return osErrorParameter;
+
+  if ((priority < osPriorityIdle) || (priority > osPriorityRealtime)) {
+    return osErrorValue;
+  }
+
+  res = rt_tsk_prio(                            // Change task priority
+    ptcb->task_id,                              // Task ID
+    priority - osPriorityIdle + 1               // New task priority
+  );
+
+  if (res == OS_R_NOK) return osErrorResource;  // Change task priority failed
+
+  return osOK;
+}
+
+/// Get current priority of an active thread
+osPriority svcThreadGetPriority (osThreadId thread_id) {
+  P_TCB ptcb;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return osPriorityError;
+
+  return (osPriority)(ptcb->prio - 1 + osPriorityIdle);
+}
+
+/// Get info from an active thread
+os_InRegs osEvent_type svcThreadGetInfo (osThreadId thread_id, osThreadInfo info) {
+  P_TCB ptcb;
+  osEvent ret;
+  ret.status = osOK;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) {
+    ret.status = osErrorValue;
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+    osEvent_ret_status;
+    return;
+#else
+    return osEvent_ret_status;
+#endif
+  }
+
+  if (osThreadInfoStackSize == info) {
+    uint32_t size;
+    size = ptcb->priv_stack;
+    if (0 == size) {
+      // This is an OS task - always a fixed size
+      size = os_stackinfo & 0x3FFFF;
+    }
+    ret.value.v = size;
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+    osEvent_ret_value;
+    return;
+#else
+    return osEvent_ret_value;
+#endif
+  }
+
+  if (osThreadInfoStackMax == info) {
+    // Cortex-A RTX does not have stack init so
+    // the maximum stack usage cannot be obtained.
+    ret.status = osErrorResource;
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+    osEvent_ret_status;
+    return;
+#else
+    return osEvent_ret_status;
+#endif
+  }
+
+  if (osThreadInfoEntry == info) {
+    ret.value.p = (void*)ptcb->ptask;
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+    osEvent_ret_value;
+    return;
+#else
+    return osEvent_ret_value;
+#endif
+  }
+
+  if (osThreadInfoArg == info) {
+    ret.value.p = (void*)ptcb->argv;
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+    osEvent_ret_value;
+    return;
+#else
+    return osEvent_ret_value;
+#endif
+  }
+
+  // Unsupported option so return error
+  ret.status = osErrorParameter;
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+    osEvent_ret_status;
+    return;
+#else
+    return osEvent_ret_status;
+#endif
+}
+
+// Thread Public API
+
+/// Create a thread and add it to Active Threads and set it to state READY
+osThreadId osThreadCreate (const osThreadDef_t *thread_def, void *argument) {
+  if (__exceptional_mode()) return NULL;           // Not allowed in ISR
+  if ((__get_mode() != MODE_USR) && (os_running == 0)) {
+    // Privileged and not running
+    return   svcThreadCreate(thread_def, argument);
+  } else {
+    osThreadId id;
+    osMutexWait(osMutexId_osThreadMutex, osWaitForever);
+    // Thread mutex must be held when a thread is created or terminated
+    id = __svcThreadCreate(thread_def, argument);
+    osMutexRelease(osMutexId_osThreadMutex);
+    return id;
+  }
+}
+
+/// Return the thread ID of the current running thread
+osThreadId osThreadGetId (void) {
+  if (__exceptional_mode()) return NULL;           // Not allowed in ISR
+  return __svcThreadGetId();
+}
+
+/// Terminate execution of a thread and remove it from ActiveThreads
+osStatus osThreadTerminate (osThreadId thread_id) {
+  osStatus status;
+  if (__exceptional_mode()) return osErrorISR;     // Not allowed in ISR
+  osMutexWait(osMutexId_osThreadMutex, osWaitForever);
+  sysThreadTerminate(thread_id);
+  // Thread mutex must be held when a thread is created or terminated
+  status = __svcThreadTerminate(thread_id);
+  osMutexRelease(osMutexId_osThreadMutex);
+  return status;
+}
+
+/// Pass control to next thread that is in state READY
+osStatus osThreadYield (void) {
+  if (__exceptional_mode()) return osErrorISR;     // Not allowed in ISR
+  return __svcThreadYield();
+}
+
+/// Change priority of an active thread
+osStatus osThreadSetPriority (osThreadId thread_id, osPriority priority) {
+  if (__exceptional_mode()) return osErrorISR;     // Not allowed in ISR
+  return __svcThreadSetPriority(thread_id, priority);
+}
+
+/// Get current priority of an active thread
+osPriority osThreadGetPriority (osThreadId thread_id) {
+  if (__exceptional_mode()) return osPriorityError;// Not allowed in ISR
+  return __svcThreadGetPriority(thread_id);
+}
+
+/// INTERNAL - Not Public
+/// Auto Terminate Thread on exit (used implicitly when thread exists)
+__NO_RETURN void osThreadExit (void) {
+  osThreadId id;
+  // Thread mutex must be held when a thread is created or terminated
+  // Note - the mutex will be released automatically by the os when
+  //        the thread is terminated
+  osMutexWait(osMutexId_osThreadMutex, osWaitForever);
+  id = __svcThreadGetId();
+  sysThreadTerminate(id);
+  __svcThreadTerminate(id);
+  for (;;);                                     // Should never come here
+}
+
+#ifdef __MBED_CMSIS_RTOS_CA9
+/// Get current thread state
+uint8_t osThreadGetState (osThreadId thread_id) {
+  P_TCB ptcb;
+
+  if (__exceptional_mode()) return osErrorISR;     // Not allowed in ISR
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return INACTIVE;
+
+  return ptcb->state;
+}
+#endif
+
+/// Get the requested info from the specified active thread
+os_InRegs osEvent _osThreadGetInfo(osThreadId thread_id, osThreadInfo info) {
+  osEvent ret;
+  if (__exceptional_mode()) {
+    ret.status = osErrorISR;
+    return ret;                                 // Not allowed in ISR
+  }
+  return __svcThreadGetInfo(thread_id, info);
+}
+
+osThreadEnumId _osThreadsEnumStart() {
+  static uint32_t thread_enum_index;
+  osMutexWait(osMutexId_osThreadMutex, osWaitForever);
+  thread_enum_index = 0;
+  return &thread_enum_index;
+}
+
+osThreadId _osThreadEnumNext(osThreadEnumId enum_id) {
+  uint32_t i;
+  osThreadId id = NULL;
+  uint32_t *index = (uint32_t*)enum_id;
+  for (i = *index; i < os_maxtaskrun; i++) {
+    if (os_active_TCB[i] != NULL) {
+      id = (osThreadId)os_active_TCB[i];
+      break;
+    }
+  }
+  if (i == os_maxtaskrun) {
+    // Include the idle task at the end of the enumeration
+    id = &os_idle_TCB;
+  }
+  *index = i + 1;
+  return id;
+}
+
+osStatus _osThreadEnumFree(osThreadEnumId enum_id) {
+  uint32_t *index = (uint32_t*)enum_id;
+  *index = 0;
+  osMutexRelease(osMutexId_osThreadMutex);
+  return osOK;
+}
+
+// ==== Generic Wait Functions ====
+
+// Generic Wait Service Calls declarations
+SVC_1_1(svcDelay,           osStatus, uint32_t, RET_osStatus)
+#if osFeature_Wait != 0
+SVC_1_3(svcWait,  os_InRegs osEvent,  uint32_t, RET_osEvent)
+#endif
+
+// Generic Wait Service Calls
+
+/// Wait for Timeout (Time Delay)
+osStatus svcDelay (uint32_t millisec) {
+  if (millisec == 0) return osOK;
+  rt_dly_wait(rt_ms2tick(millisec));
+  return osEventTimeout;
+}
+
+/// Wait for Signal, Message, Mail, or Timeout
+#if osFeature_Wait != 0
+os_InRegs osEvent_type svcWait (uint32_t millisec) {
+  osEvent ret;
+
+  if (millisec == 0) {
+    ret.status = osOK;
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+    osEvent_ret_status;
+    return;
+#else
+    return osEvent_ret_status;
+#endif
+  }
+
+  /* To Do: osEventSignal, osEventMessage, osEventMail */
+  rt_dly_wait(rt_ms2tick(millisec));
+  ret.status = osEventTimeout;
+
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+  osEvent_ret_status;
+  return;
+#else
+  return osEvent_ret_status;
+#endif
+}
+#endif
+
+
+// Generic Wait API
+
+/// Wait for Timeout (Time Delay)
+osStatus osDelay (uint32_t millisec) {
+  if (__exceptional_mode()) return osErrorISR;     // Not allowed in ISR
+  return __svcDelay(millisec);
+}
+
+/// Wait for Signal, Message, Mail, or Timeout
+os_InRegs osEvent osWait (uint32_t millisec) {
+  osEvent ret;
+
+#if osFeature_Wait == 0
+  ret.status = osErrorOS;
+  return ret;
+#else
+  if (__exceptional_mode()) {                      // Not allowed in ISR
+    ret.status = osErrorISR;
+    return ret;
+  }
+  return __svcWait(millisec);
+#endif
+}
+
+
+// ==== Timer Management ====
+
+// Timer definitions
+#define osTimerInvalid  0
+#define osTimerStopped  1
+#define osTimerRunning  2
+
+// Timer structures
+
+typedef struct os_timer_cb_ {                   // Timer Control Block
+  struct os_timer_cb_ *next;                    // Pointer to next active Timer
+  uint8_t             state;                    // Timer State
+  uint8_t              type;                    // Timer Type (Periodic/One-shot)
+  uint16_t         reserved;                    // Reserved
+  uint16_t             tcnt;                    // Timer Delay Count
+  uint16_t             icnt;                    // Timer Initial Count
+  void                 *arg;                    // Timer Function Argument
+  const osTimerDef_t *timer;                    // Pointer to Timer definition
+} os_timer_cb;
+
+// Timer variables
+os_timer_cb *os_timer_head;                     // Pointer to first active Timer
+
+
+// Timer Helper Functions
+
+// Insert Timer into the list sorted by time
+static void rt_timer_insert (os_timer_cb *pt, uint32_t tcnt) {
+  os_timer_cb *p, *prev;
+
+  prev = NULL;
+  p = os_timer_head;
+  while (p != NULL) {
+    if (tcnt < p->tcnt) break;
+    tcnt -= p->tcnt;
+    prev = p;
+    p = p->next;
+  }
+  pt->next = p;
+  pt->tcnt = (uint16_t)tcnt;
+  if (p != NULL) {
+    p->tcnt -= pt->tcnt;
+  }
+  if (prev != NULL) {
+    prev->next = pt;
+  } else {
+    os_timer_head = pt;
+  }
+}
+
+// Remove Timer from the list
+static int rt_timer_remove (os_timer_cb *pt) {
+  os_timer_cb *p, *prev;
+
+  prev = NULL;
+  p = os_timer_head;
+  while (p != NULL) {
+    if (p == pt) break;
+    prev = p;
+    p = p->next;
+  }
+  if (p == NULL) return -1;
+  if (prev != NULL) {
+    prev->next = pt->next;
+  } else {
+    os_timer_head = pt->next;
+  }
+  if (pt->next != NULL) {
+    pt->next->tcnt += pt->tcnt;
+  }
+
+  return 0;
+}
+
+
+// Timer Service Calls declarations
+SVC_3_1(svcTimerCreate,           osTimerId,  const osTimerDef_t *, os_timer_type, void *, RET_pointer)
+SVC_2_1(svcTimerStart,            osStatus,         osTimerId,      uint32_t,              RET_osStatus)
+SVC_1_1(svcTimerStop,             osStatus,         osTimerId,                             RET_osStatus)
+SVC_1_1(svcTimerDelete,           osStatus,         osTimerId,                             RET_osStatus)
+SVC_1_2(svcTimerCall,   os_InRegs osCallback,       osTimerId,                             RET_osCallback)
+
+// Timer Management Service Calls
+
+/// Create timer
+osTimerId svcTimerCreate (const osTimerDef_t *timer_def, os_timer_type type, void *argument) {
+  os_timer_cb *pt;
+
+  if ((timer_def == NULL) || (timer_def->ptimer == NULL)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  pt = timer_def->timer;
+  if (pt == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  if ((type != osTimerOnce) && (type != osTimerPeriodic)) {
+    sysThreadError(osErrorValue);
+    return NULL;
+  }
+
+  if (osThreadId_osTimerThread == NULL) {
+    sysThreadError(osErrorResource);
+    return NULL;
+  }
+
+  if (pt->state != osTimerInvalid){
+    sysThreadError(osErrorResource);
+    return NULL;
+  }
+
+  pt->next  = NULL;
+  pt->state = osTimerStopped;
+  pt->type  =  (uint8_t)type;
+  pt->arg   = argument;
+  pt->timer = timer_def;
+
+  return (osTimerId)pt;
+}
+
+/// Start or restart timer
+osStatus svcTimerStart (osTimerId timer_id, uint32_t millisec) {
+  os_timer_cb *pt;
+  uint32_t     tcnt;
+
+  pt = rt_id2obj(timer_id);
+  if (pt == NULL) return osErrorParameter;
+
+  tcnt = rt_ms2tick(millisec);
+  if (tcnt == 0) return osErrorValue;
+
+  switch (pt->state) {
+    case osTimerRunning:
+      if (rt_timer_remove(pt) != 0) {
+        return osErrorResource;
+      }
+      break;
+    case osTimerStopped:
+      pt->state = osTimerRunning;
+      pt->icnt  = (uint16_t)tcnt;
+      break;
+    default:
+      return osErrorResource;
+  }
+
+  rt_timer_insert(pt, tcnt);
+
+  return osOK;
+}
+
+/// Stop timer
+osStatus svcTimerStop (osTimerId timer_id) {
+  os_timer_cb *pt;
+
+  pt = rt_id2obj(timer_id);
+  if (pt == NULL) return osErrorParameter;
+
+  if (pt->state != osTimerRunning) return osErrorResource;
+
+  pt->state = osTimerStopped;
+
+  if (rt_timer_remove(pt) != 0) {
+    return osErrorResource;
+  }
+
+  return osOK;
+}
+
+/// Delete timer
+osStatus svcTimerDelete (osTimerId timer_id) {
+  os_timer_cb *pt;
+
+  pt = rt_id2obj(timer_id);
+  if (pt == NULL) return osErrorParameter;
+
+  switch (pt->state) {
+    case osTimerRunning:
+      rt_timer_remove(pt);
+      break;
+    case osTimerStopped:
+      break;
+    default:
+      return osErrorResource;
+  }
+
+  pt->state = osTimerInvalid;
+
+  return osOK;
+}
+
+/// Get timer callback parameters
+os_InRegs osCallback_type svcTimerCall (osTimerId timer_id) {
+  os_timer_cb *pt;
+  osCallback   ret;
+
+  pt = rt_id2obj(timer_id);
+  if (pt == NULL) {
+    ret.fp  = NULL;
+    ret.arg = NULL;
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+    osCallback_ret;
+    return;
+#else
+    return osCallback_ret;
+#endif
+  }
+
+  ret.fp  = (void *)pt->timer->ptimer;
+  ret.arg = pt->arg;
+
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+  osCallback_ret;
+  return;
+#else
+  return osCallback_ret;
+#endif
+}
+
+static __INLINE osStatus isrMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec);
+
+/// Timer Tick (called each SysTick)
+void sysTimerTick (void) {
+  os_timer_cb *pt, *p;
+
+  p = os_timer_head;
+  if (p == NULL) return;
+
+  p->tcnt--;
+  while ((p != NULL) && (p->tcnt == 0)) {
+    pt = p;
+    p = p->next;
+    os_timer_head = p;
+    isrMessagePut(osMessageQId_osTimerMessageQ, (uint32_t)pt, 0);
+    if (pt->type == osTimerPeriodic) {
+      rt_timer_insert(pt, pt->icnt);
+    } else {
+      pt->state = osTimerStopped;
+    }
+  }
+}
+
+/// Get user timers wake-up time 
+uint32_t sysUserTimerWakeupTime (void) {
+
+  if (os_timer_head) {
+    return os_timer_head->tcnt;
+  }
+  return 0xFFFF;
+}
+
+/// Update user timers on resume
+void sysUserTimerUpdate (uint32_t sleep_time) {
+
+  while (os_timer_head && sleep_time) {
+    if (sleep_time >= os_timer_head->tcnt) {
+      sleep_time -= os_timer_head->tcnt;
+      os_timer_head->tcnt = 1;
+      sysTimerTick();
+    } else {
+      os_timer_head->tcnt -= sleep_time;
+      break;
+    }
+  }
+}
+
+
+// Timer Management Public API
+
+/// Create timer
+osTimerId osTimerCreate (const osTimerDef_t *timer_def, os_timer_type type, void *argument) {
+  if (__exceptional_mode()) return NULL;           // Not allowed in ISR
+  if ((__get_mode() != MODE_USR) && (os_running == 0)) {
+    // Privileged and not running
+    return   svcTimerCreate(timer_def, type, argument);
+  } else {
+    return __svcTimerCreate(timer_def, type, argument);
+  }
+}
+
+/// Start or restart timer
+osStatus osTimerStart (osTimerId timer_id, uint32_t millisec) {
+  if (__exceptional_mode()) return osErrorISR;     // Not allowed in ISR
+  return __svcTimerStart(timer_id, millisec);
+}
+
+/// Stop timer
+osStatus osTimerStop (osTimerId timer_id) {
+  if (__exceptional_mode()) return osErrorISR;     // Not allowed in ISR
+  return __svcTimerStop(timer_id);
+}
+
+/// Delete timer
+osStatus osTimerDelete (osTimerId timer_id) {
+  if (__exceptional_mode()) return osErrorISR;     // Not allowed in ISR
+  return __svcTimerDelete(timer_id);
+}
+
+/// INTERNAL - Not Public
+/// Get timer callback parameters (used by OS Timer Thread)
+os_InRegs osCallback osTimerCall (osTimerId timer_id) {
+  return __svcTimerCall(timer_id);
+}
+
+
+// Timer Thread
+__NO_RETURN void osTimerThread (void const *argument) {
+  osCallback cb;
+  osEvent    evt;
+
+  for (;;) {
+    evt = osMessageGet(osMessageQId_osTimerMessageQ, osWaitForever);
+    if (evt.status == osEventMessage) {
+      cb = osTimerCall(evt.value.p);
+      if (cb.fp != NULL) {
+        (*(os_ptimer)cb.fp)(cb.arg);
+      }
+    }
+  }
+}
+
+
+// ==== Signal Management ====
+
+// Signal Service Calls declarations
+SVC_2_1(svcSignalSet,             int32_t, osThreadId, int32_t,  RET_int32_t)
+SVC_2_1(svcSignalClear,           int32_t, osThreadId, int32_t,  RET_int32_t)
+SVC_2_3(svcSignalWait,  os_InRegs osEvent, int32_t,    uint32_t, RET_osEvent)
+
+// Signal Service Calls
+
+/// Set the specified Signal Flags of an active thread
+int32_t svcSignalSet (osThreadId thread_id, int32_t signals) {
+  P_TCB   ptcb;
+  int32_t sig;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return 0x80000000;
+
+  if (signals & (0xFFFFFFFF << osFeature_Signals)) return 0x80000000;
+
+  sig = ptcb->events;                           // Previous signal flags
+
+  rt_evt_set(signals, ptcb->task_id);           // Set event flags
+
+  return sig;
+}
+
+/// Clear the specified Signal Flags of an active thread
+int32_t svcSignalClear (osThreadId thread_id, int32_t signals) {
+  P_TCB   ptcb;
+  int32_t sig;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return 0x80000000;
+
+  if (signals & (0xFFFFFFFF << osFeature_Signals)) return 0x80000000;
+
+  sig = ptcb->events;                           // Previous signal flags
+
+  rt_evt_clr(signals, ptcb->task_id);           // Clear event flags
+
+  return sig;
+}
+
+/// Wait for one or more Signal Flags to become signaled for the current RUNNING thread
+os_InRegs osEvent_type svcSignalWait (int32_t signals, uint32_t millisec) {
+  OS_RESULT res;
+  osEvent   ret;
+
+  if (signals & (0xFFFFFFFF << osFeature_Signals)) {
+    ret.status = osErrorValue;
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+    osEvent_ret_status;
+    return;
+#else
+    return osEvent_ret_status;
+#endif
+  }
+
+  if (signals != 0) {                           // Wait for all specified signals
+    res = rt_evt_wait(signals, rt_ms2tick(millisec), __TRUE);
+  } else {                                      // Wait for any signal
+    res = rt_evt_wait(0xFFFF,  rt_ms2tick(millisec), __FALSE);
+  }
+
+  if (res == OS_R_EVT) {
+    ret.status = osEventSignal;
+    ret.value.signals = signals ? signals : os_tsk.run->waits;
+  } else {
+    ret.status = millisec ? osEventTimeout : osOK;
+    ret.value.signals = 0;
+  }
+
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+  osEvent_ret_value;
+  return;
+#else
+  return osEvent_ret_value;
+#endif
+}
+
+
+// Signal ISR Calls
+
+/// Set the specified Signal Flags of an active thread
+static __INLINE int32_t isrSignalSet (osThreadId thread_id, int32_t signals) {
+  P_TCB   ptcb;
+  int32_t sig;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return 0x80000000;
+
+  if (signals & (0xFFFFFFFF << osFeature_Signals)) return 0x80000000;
+
+  sig = ptcb->events;                           // Previous signal flags
+
+  isr_evt_set(signals, ptcb->task_id);          // Set event flags
+
+  return sig;
+}
+
+
+// Signal Public API
+
+/// Set the specified Signal Flags of an active thread
+int32_t osSignalSet (osThreadId thread_id, int32_t signals) {
+  if (__exceptional_mode()) {                      // in ISR
+    return   isrSignalSet(thread_id, signals);
+  } else {                                      // in Thread
+    return __svcSignalSet(thread_id, signals);
+  }
+}
+
+/// Clear the specified Signal Flags of an active thread
+int32_t osSignalClear (osThreadId thread_id, int32_t signals) {
+  if (__exceptional_mode()) return osErrorISR;     // Not allowed in ISR
+  return __svcSignalClear(thread_id, signals);
+}
+
+/// Wait for one or more Signal Flags to become signaled for the current RUNNING thread
+os_InRegs osEvent osSignalWait (int32_t signals, uint32_t millisec) {
+  osEvent ret;
+
+  if (__exceptional_mode()) {                      // Not allowed in ISR
+    ret.status = osErrorISR;
+    return ret;
+  }
+  return __svcSignalWait(signals, millisec);
+}
+
+
+// ==== Mutex Management ====
+
+// Mutex Service Calls declarations
+SVC_1_1(svcMutexCreate,  osMutexId, const osMutexDef_t *,           RET_pointer)
+SVC_2_1(svcMutexWait,    osStatus,        osMutexId,      uint32_t, RET_osStatus)
+SVC_1_1(svcMutexRelease, osStatus,        osMutexId,                RET_osStatus)
+SVC_1_1(svcMutexDelete,  osStatus,        osMutexId,                RET_osStatus)
+
+// Mutex Service Calls
+
+/// Create and Initialize a Mutex object
+osMutexId svcMutexCreate (const osMutexDef_t *mutex_def) {
+  OS_ID mut;
+
+  if (mutex_def == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  mut = mutex_def->mutex;
+  if (mut == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  if (((P_MUCB)mut)->cb_type != 0) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  rt_mut_init(mut);                             // Initialize Mutex
+
+  return mut;
+}
+
+/// Wait until a Mutex becomes available
+osStatus svcMutexWait (osMutexId mutex_id, uint32_t millisec) {
+  OS_ID     mut;
+  OS_RESULT res;
+
+  mut = rt_id2obj(mutex_id);
+  if (mut == NULL) return osErrorParameter;
+
+  if (((P_MUCB)mut)->cb_type != MUCB) return osErrorParameter;
+
+  res = rt_mut_wait(mut, rt_ms2tick(millisec)); // Wait for Mutex
+
+  if (res == OS_R_TMO) {
+    return (millisec ? osErrorTimeoutResource : osErrorResource);
+  }
+
+  return osOK;
+}
+
+/// Release a Mutex that was obtained with osMutexWait
+osStatus svcMutexRelease (osMutexId mutex_id) {
+  OS_ID     mut;
+  OS_RESULT res;
+
+  mut = rt_id2obj(mutex_id);
+  if (mut == NULL) return osErrorParameter;
+
+  if (((P_MUCB)mut)->cb_type != MUCB) return osErrorParameter;
+
+  res = rt_mut_release(mut);                    // Release Mutex
+
+  if (res == OS_R_NOK) return osErrorResource;  // Thread not owner or Zero Counter
+
+  return osOK;
+}
+
+/// Delete a Mutex that was created by osMutexCreate
+osStatus svcMutexDelete (osMutexId mutex_id) {
+  OS_ID mut;
+
+  mut = rt_id2obj(mutex_id);
+  if (mut == NULL) return osErrorParameter;
+
+  if (((P_MUCB)mut)->cb_type != MUCB) return osErrorParameter;
+
+  rt_mut_delete(mut);                           // Release Mutex
+
+  return osOK;
+}
+
+
+// Mutex Public API
+
+/// Create and Initialize a Mutex object
+osMutexId osMutexCreate (const osMutexDef_t *mutex_def) {
+  if (__exceptional_mode()) return NULL;           // Not allowed in ISR
+  if ((__get_mode() != MODE_USR) && (os_running == 0)) {
+    // Privileged and not running
+    return    svcMutexCreate(mutex_def);
+  } else {
+    return __svcMutexCreate(mutex_def);
+  }
+}
+
+/// Wait until a Mutex becomes available
+osStatus osMutexWait (osMutexId mutex_id, uint32_t millisec) {
+  if (__exceptional_mode()) return osErrorISR;     // Not allowed in ISR
+  return __svcMutexWait(mutex_id, millisec);
+}
+
+/// Release a Mutex that was obtained with osMutexWait
+osStatus osMutexRelease (osMutexId mutex_id) {
+  if (__exceptional_mode()) return osErrorISR;     // Not allowed in ISR
+  return __svcMutexRelease(mutex_id);
+}
+
+/// Delete a Mutex that was created by osMutexCreate
+osStatus osMutexDelete (osMutexId mutex_id) {
+  if (__exceptional_mode()) return osErrorISR;     // Not allowed in ISR
+  return __svcMutexDelete(mutex_id);
+}
+
+
+// ==== Semaphore Management ====
+
+// Semaphore Service Calls declarations
+SVC_2_1(svcSemaphoreCreate,  osSemaphoreId, const osSemaphoreDef_t *,  int32_t, RET_pointer)
+SVC_2_1(svcSemaphoreWait,    int32_t,             osSemaphoreId,      uint32_t, RET_int32_t)
+SVC_1_1(svcSemaphoreRelease, osStatus,            osSemaphoreId,                RET_osStatus)
+SVC_1_1(svcSemaphoreDelete,  osStatus,            osSemaphoreId,                RET_osStatus)
+
+// Semaphore Service Calls
+
+/// Create and Initialize a Semaphore object
+osSemaphoreId svcSemaphoreCreate (const osSemaphoreDef_t *semaphore_def, int32_t count) {
+  OS_ID sem;
+
+  if (semaphore_def == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  sem = semaphore_def->semaphore;
+  if (sem == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  if (((P_SCB)sem)->cb_type != 0) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  if (count > osFeature_Semaphore) {
+    sysThreadError(osErrorValue);
+    return NULL;
+  }
+
+  rt_sem_init(sem, count);                      // Initialize Semaphore
+
+  return sem;
+}
+
+/// Wait until a Semaphore becomes available
+int32_t svcSemaphoreWait (osSemaphoreId semaphore_id, uint32_t millisec) {
+  OS_ID     sem;
+  OS_RESULT res;
+
+  sem = rt_id2obj(semaphore_id);
+  if (sem == NULL) return -1;
+
+  if (((P_SCB)sem)->cb_type != SCB) return -1;
+
+  res = rt_sem_wait(sem, rt_ms2tick(millisec)); // Wait for Semaphore
+
+  if (res == OS_R_TMO) return 0;                // Timeout
+
+  return (((P_SCB)sem)->tokens + 1);
+}
+
+/// Release a Semaphore
+osStatus svcSemaphoreRelease (osSemaphoreId semaphore_id) {
+  OS_ID sem;
+
+  sem = rt_id2obj(semaphore_id);
+  if (sem == NULL) return osErrorParameter;
+
+  if (((P_SCB)sem)->cb_type != SCB) return osErrorParameter;
+
+  if (((P_SCB)sem)->tokens == osFeature_Semaphore) return osErrorResource;
+
+  rt_sem_send(sem);                             // Release Semaphore
+
+  return osOK;
+}
+
+/// Delete a Semaphore that was created by osSemaphoreCreate
+osStatus svcSemaphoreDelete (osSemaphoreId semaphore_id) {
+  OS_ID sem;
+
+  sem = rt_id2obj(semaphore_id);
+  if (sem == NULL) return osErrorParameter;
+
+  if (((P_SCB)sem)->cb_type != SCB) return osErrorParameter;
+
+  rt_sem_delete(sem);                           // Delete Semaphore
+
+  return osOK;
+}
+
+
+// Semaphore ISR Calls
+
+/// Release a Semaphore
+static __INLINE osStatus isrSemaphoreRelease (osSemaphoreId semaphore_id) {
+  OS_ID sem;
+
+  sem = rt_id2obj(semaphore_id);
+  if (sem == NULL) return osErrorParameter;
+
+  if (((P_SCB)sem)->cb_type != SCB) return osErrorParameter;
+
+  if (((P_SCB)sem)->tokens == osFeature_Semaphore) return osErrorResource;
+
+  isr_sem_send(sem);                            // Release Semaphore
+
+  return osOK;
+}
+
+
+// Semaphore Public API
+
+/// Create and Initialize a Semaphore object
+osSemaphoreId osSemaphoreCreate (const osSemaphoreDef_t *semaphore_def, int32_t count) {
+  if (__exceptional_mode()) return NULL;           // Not allowed in ISR
+  if ((__get_mode() != MODE_USR) && (os_running == 0)) {
+    // Privileged and not running
+    return   svcSemaphoreCreate(semaphore_def, count);
+  } else {
+    return __svcSemaphoreCreate(semaphore_def, count);
+  }
+}
+
+/// Wait until a Semaphore becomes available
+int32_t osSemaphoreWait (osSemaphoreId semaphore_id, uint32_t millisec) {
+  if (__exceptional_mode()) return -1;             // Not allowed in ISR
+  return __svcSemaphoreWait(semaphore_id, millisec);
+}
+
+/// Release a Semaphore
+osStatus osSemaphoreRelease (osSemaphoreId semaphore_id) {
+  if (__exceptional_mode()) {                      // in ISR
+    return   isrSemaphoreRelease(semaphore_id);
+  } else {                                      // in Thread
+    return __svcSemaphoreRelease(semaphore_id);
+  }
+}
+
+/// Delete a Semaphore that was created by osSemaphoreCreate
+osStatus osSemaphoreDelete (osSemaphoreId semaphore_id) {
+  if (__exceptional_mode()) return osErrorISR;     // Not allowed in ISR
+  return __svcSemaphoreDelete(semaphore_id);
+}
+
+
+// ==== Memory Management Functions ====
+
+// Memory Management Helper Functions
+
+// Clear Memory Box (Zero init)
+static void rt_clr_box (void *box_mem, void *box) {
+  uint32_t *p, n;
+
+  if (box) {
+    p = box;
+    for (n = ((P_BM)box_mem)->blk_size; n; n -= 4) {
+      *p++ = 0;
+    }
+  }
+}
+
+// Memory Management Service Calls declarations
+SVC_1_1(svcPoolCreate, osPoolId, const osPoolDef_t *,           RET_pointer)
+SVC_2_1(sysPoolAlloc,  void *,         osPoolId,      uint32_t, RET_pointer)
+SVC_2_1(sysPoolFree,   osStatus,       osPoolId,      void *,   RET_osStatus)
+
+// Memory Management Service & ISR Calls
+
+/// Create and Initialize memory pool
+osPoolId svcPoolCreate (const osPoolDef_t *pool_def) {
+  uint32_t blk_sz;
+
+  if ((pool_def == NULL) ||
+      (pool_def->pool_sz == 0) ||
+      (pool_def->item_sz == 0) ||
+      (pool_def->pool == NULL)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  blk_sz = (pool_def->item_sz + 3) & ~3;
+
+  _init_box(pool_def->pool, sizeof(struct OS_BM) + pool_def->pool_sz * blk_sz, blk_sz);
+
+  return pool_def->pool;
+}
+
+/// Allocate a memory block from a memory pool
+void *sysPoolAlloc (osPoolId pool_id, uint32_t clr) {
+  void *ptr;
+
+  if (pool_id == NULL) return NULL;
+
+  ptr = rt_alloc_box(pool_id);
+  if (clr) {
+    rt_clr_box(pool_id, ptr);
+  }
+
+  return ptr;
+}
+
+/// Return an allocated memory block back to a specific memory pool
+osStatus sysPoolFree (osPoolId pool_id, void *block) {
+  int32_t res;
+
+  if (pool_id == NULL) return osErrorParameter;
+
+  res = rt_free_box(pool_id, block);
+  if (res != 0) return osErrorValue;
+
+  return osOK;
+}
+
+
+// Memory Management Public API
+
+/// Create and Initialize memory pool
+osPoolId osPoolCreate (const osPoolDef_t *pool_def) {
+  if (__exceptional_mode()) return NULL;           // Not allowed in ISR
+  if ((__get_mode() != MODE_USR) && (os_running == 0)) {
+    // Privileged and not running
+    return   svcPoolCreate(pool_def);
+  } else {
+    return __svcPoolCreate(pool_def);
+  }
+}
+
+/// Allocate a memory block from a memory pool
+void *osPoolAlloc (osPoolId pool_id) {
+  if (__get_mode() != MODE_USR) {               // in ISR or Privileged
+    return   sysPoolAlloc(pool_id, 0);
+  } else {                                      // in Thread
+    return __sysPoolAlloc(pool_id, 0);
+  }
+}
+
+/// Allocate a memory block from a memory pool and set memory block to zero
+void *osPoolCAlloc (osPoolId pool_id) {
+  if (__get_mode() != MODE_USR) {               // in ISR or Privileged
+    return   sysPoolAlloc(pool_id, 1);
+  } else {                                      // in Thread
+    return __sysPoolAlloc(pool_id, 1);
+  }
+}
+
+/// Return an allocated memory block back to a specific memory pool
+osStatus osPoolFree (osPoolId pool_id, void *block) {
+  if (__get_mode() != MODE_USR) {               // in ISR or Privileged
+    return   sysPoolFree(pool_id, block);
+  } else {                                      // in Thread
+    return __sysPoolFree(pool_id, block);
+  }
+}
+
+
+// ==== Message Queue Management Functions ====
+
+// Message Queue Management Service Calls declarations
+SVC_2_1(svcMessageCreate,        osMessageQId, const osMessageQDef_t *, osThreadId,           RET_pointer)
+SVC_3_1(svcMessagePut,           osStatus,           osMessageQId,      uint32_t,   uint32_t, RET_osStatus)
+SVC_2_3(svcMessageGet, os_InRegs osEvent,            osMessageQId,      uint32_t,             RET_osEvent)
+
+// Message Queue Service Calls
+
+/// Create and Initialize Message Queue
+osMessageQId svcMessageCreate (const osMessageQDef_t *queue_def, osThreadId thread_id) {
+
+  if ((queue_def == NULL) ||
+      (queue_def->queue_sz == 0) ||
+      (queue_def->pool == NULL)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  if (((P_MCB)queue_def->pool)->cb_type != 0) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  rt_mbx_init(queue_def->pool, 4*(queue_def->queue_sz + 4));
+
+  return queue_def->pool;
+}
+
+/// Put a Message to a Queue
+osStatus svcMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec) {
+  OS_RESULT res;
+
+  if (queue_id == NULL) return osErrorParameter;
+
+  if (((P_MCB)queue_id)->cb_type != MCB) return osErrorParameter;
+
+  res = rt_mbx_send(queue_id, (void *)info, rt_ms2tick(millisec));
+
+  if (res == OS_R_TMO) {
+    return (millisec ? osErrorTimeoutResource : osErrorResource);
+  }
+
+  return osOK;
+}
+
+/// Get a Message or Wait for a Message from a Queue
+os_InRegs osEvent_type svcMessageGet (osMessageQId queue_id, uint32_t millisec) {
+  OS_RESULT res;
+  osEvent   ret;
+
+  if (queue_id == NULL) {
+    ret.status = osErrorParameter;
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+    osEvent_ret_status;
+    return;
+#else
+    return osEvent_ret_status;
+#endif
+  }
+
+  if (((P_MCB)queue_id)->cb_type != MCB) {
+    ret.status = osErrorParameter;
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+    osEvent_ret_status;
+    return;
+#else
+    return osEvent_ret_status;
+#endif
+  }
+
+  res = rt_mbx_wait(queue_id, &ret.value.p, rt_ms2tick(millisec));
+
+  if (res == OS_R_TMO) {
+    ret.status = millisec ? osEventTimeout : osOK;
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+    osEvent_ret_value;
+    return;
+#else
+    return osEvent_ret_value;
+#endif
+  }
+
+  ret.status = osEventMessage;
+
+#if defined (__GNUC__) && defined (__ARM_PCS_VFP)
+  osEvent_ret_value;
+  return;
+#else
+  return osEvent_ret_value;
+#endif
+}
+
+
+// Message Queue ISR Calls
+
+/// Put a Message to a Queue
+static __INLINE osStatus isrMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec) {
+
+  if ((queue_id == NULL) || (millisec != 0)) {
+    return osErrorParameter;
+  }
+
+  if (((P_MCB)queue_id)->cb_type != MCB) return osErrorParameter;
+
+  if (rt_mbx_check(queue_id) == 0) {            // Check if Queue is full
+    return osErrorResource;
+  }
+
+  isr_mbx_send(queue_id, (void *)info);
+
+  return osOK;
+}
+
+/// Get a Message or Wait for a Message from a Queue
+static __INLINE os_InRegs osEvent isrMessageGet (osMessageQId queue_id, uint32_t millisec) {
+  OS_RESULT res;
+  osEvent   ret;
+
+  if ((queue_id == NULL) || (millisec != 0)) {
+    ret.status = osErrorParameter;
+    return ret;
+  }
+
+  if (((P_MCB)queue_id)->cb_type != MCB) {
+    ret.status = osErrorParameter;
+    return ret;
+  }
+
+  res = isr_mbx_receive(queue_id, &ret.value.p);
+
+  if (res != OS_R_MBX) {
+    ret.status = osOK;
+    return ret;
+  }
+
+  ret.status = osEventMessage;
+
+  return ret;
+}
+
+
+// Message Queue Management Public API
+
+/// Create and Initialize Message Queue
+osMessageQId osMessageCreate (const osMessageQDef_t *queue_def, osThreadId thread_id) {
+  if (__exceptional_mode()) return NULL;           // Not allowed in ISR
+  if ((__get_mode() != MODE_USR) && (os_running == 0)) {
+    // Privileged and not running
+    return   svcMessageCreate(queue_def, thread_id);
+  } else {
+    return __svcMessageCreate(queue_def, thread_id);
+  }
+}
+
+/// Put a Message to a Queue
+osStatus osMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec) {
+  if (__exceptional_mode()) {                      // in ISR
+    return   isrMessagePut(queue_id, info, millisec);
+  } else {                                      // in Thread
+    return __svcMessagePut(queue_id, info, millisec);
+  }
+}
+
+/// Get a Message or Wait for a Message from a Queue
+os_InRegs osEvent osMessageGet (osMessageQId queue_id, uint32_t millisec) {
+  if (__exceptional_mode()) {                      // in ISR
+    return   isrMessageGet(queue_id, millisec);
+  } else {                                      // in Thread
+    return __svcMessageGet(queue_id, millisec);
+  }
+}
+
+
+// ==== Mail Queue Management Functions ====
+
+// Mail Queue Management Service Calls declarations
+SVC_2_1(svcMailCreate, osMailQId, const osMailQDef_t *, osThreadId,                   RET_pointer)
+SVC_4_1(sysMailAlloc,  void *,          osMailQId,      uint32_t, uint32_t, uint32_t, RET_pointer)
+SVC_3_1(sysMailFree,   osStatus,        osMailQId,      void *,   uint32_t,           RET_osStatus)
+
+// Mail Queue Management Service & ISR Calls
+
+/// Create and Initialize mail queue
+osMailQId svcMailCreate (const osMailQDef_t *queue_def, osThreadId thread_id) {
+  uint32_t blk_sz;
+  P_MCB    pmcb;
+  void    *pool;
+
+  if ((queue_def == NULL) ||
+      (queue_def->queue_sz == 0) ||
+      (queue_def->item_sz  == 0) ||
+      (queue_def->pool == NULL)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  pmcb = *(((void **)queue_def->pool) + 0);
+  pool = *(((void **)queue_def->pool) + 1);
+
+  if ((pool == NULL) || (pmcb == NULL) || (pmcb->cb_type != 0)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  blk_sz = (queue_def->item_sz + 3) & ~3;
+
+  _init_box(pool, sizeof(struct OS_BM) + queue_def->queue_sz * blk_sz, blk_sz);
+
+  rt_mbx_init(pmcb, 4*(queue_def->queue_sz + 4));
+
+  return queue_def->pool;
+}
+
+/// Allocate a memory block from a mail
+void *sysMailAlloc (osMailQId queue_id, uint32_t millisec, uint32_t isr, uint32_t clr) {
+  P_MCB pmcb;
+  void *pool;
+  void *mem;
+
+  if (queue_id == NULL) return NULL;
+
+  pmcb = *(((void **)queue_id) + 0);
+  pool = *(((void **)queue_id) + 1);
+
+  if ((pool == NULL) || (pmcb == NULL)) return NULL;
+
+  if (isr && (millisec != 0)) return NULL;
+
+  mem = rt_alloc_box(pool);
+  if (clr) {
+    rt_clr_box(pool, mem);
+  }
+
+  if ((mem == NULL) && (millisec != 0)) {
+    // Put Task to sleep when Memory not available
+    if (pmcb->p_lnk != NULL) {
+      rt_put_prio((P_XCB)pmcb, os_tsk.run);
+    } else {
+      pmcb->p_lnk = os_tsk.run;
+      os_tsk.run->p_lnk = NULL;
+      os_tsk.run->p_rlnk = (P_TCB)pmcb;
+      // Task is waiting to allocate a message
+      pmcb->state = 3;
+    }
+    rt_block(rt_ms2tick(millisec), WAIT_MBX);
+  }
+
+  return mem;
+}
+
+/// Free a memory block from a mail
+osStatus sysMailFree (osMailQId queue_id, void *mail, uint32_t isr) {
+  P_MCB   pmcb;
+  P_TCB   ptcb;
+  void   *pool;
+  void   *mem;
+  int32_t res;
+
+  if (queue_id == NULL) return osErrorParameter;
+
+  pmcb = *(((void **)queue_id) + 0);
+  pool = *(((void **)queue_id) + 1);
+
+  if ((pmcb == NULL) || (pool == NULL)) return osErrorParameter;
+
+  res = rt_free_box(pool, mail);
+
+  if (res != 0) return osErrorValue;
+
+  if ((pmcb->p_lnk != NULL) && (pmcb->state == 3)) {
+    // Task is waiting to allocate a message
+    if (isr) {
+      rt_psq_enq (pmcb, (U32)pool);
+      rt_psh_req ();
+    } else {
+      mem = rt_alloc_box(pool);
+      if (mem != NULL) {
+        ptcb = rt_get_first((P_XCB)pmcb);
+        rt_ret_val(ptcb, (U32)mem);
+        rt_rmv_dly(ptcb);
+        rt_dispatch(ptcb);
+      }
+    }
+  }
+
+  return osOK;
+}
+
+
+// Mail Queue Management Public API
+
+/// Create and Initialize mail queue
+osMailQId osMailCreate (const osMailQDef_t *queue_def, osThreadId thread_id) {
+  if (__exceptional_mode()) return NULL;           // Not allowed in ISR
+  if ((__get_mode() != MODE_USR) && (os_running == 0)) {
+    // Privileged and not running
+    return   svcMailCreate(queue_def, thread_id);
+  } else {
+    return __svcMailCreate(queue_def, thread_id);
+  }
+}
+
+/// Allocate a memory block from a mail
+void *osMailAlloc (osMailQId queue_id, uint32_t millisec) {
+  if (__exceptional_mode()) {                      // in ISR
+    return   sysMailAlloc(queue_id, millisec, 1, 0);
+  } else {                                      // in Thread
+    return __sysMailAlloc(queue_id, millisec, 0, 0);
+  }
+}
+
+/// Allocate a memory block from a mail and set memory block to zero
+void *osMailCAlloc (osMailQId queue_id, uint32_t millisec) {
+  if (__exceptional_mode()) {                      // in ISR
+    return   sysMailAlloc(queue_id, millisec, 1, 1);
+  } else {                                      // in Thread
+    return __sysMailAlloc(queue_id, millisec, 0, 1);
+  }
+}
+
+/// Free a memory block from a mail
+osStatus osMailFree (osMailQId queue_id, void *mail) {
+  if (__exceptional_mode()) {                      // in ISR
+    return   sysMailFree(queue_id, mail, 1);
+  } else {                                      // in Thread
+    return __sysMailFree(queue_id, mail, 0);
+  }
+}
+
+/// Put a mail to a queue
+osStatus osMailPut (osMailQId queue_id, void *mail) {
+  if (queue_id == NULL) return osErrorParameter;
+  if (mail == NULL)     return osErrorValue;
+  return osMessagePut(*((void **)queue_id), (uint32_t)mail, 0);
+}
+
+#ifdef __CC_ARM
+#pragma push
+#pragma Ospace
+#endif // __arm__
+/// Get a mail from a queue
+os_InRegs osEvent osMailGet (osMailQId queue_id, uint32_t millisec) {
+  osEvent ret;
+
+  if (queue_id == NULL) {
+    ret.status = osErrorParameter;
+    return ret;
+  }
+
+  ret = osMessageGet(*((void **)queue_id), millisec);
+  if (ret.status == osEventMessage) ret.status = osEventMail;
+
+  return ret;
+}
+#ifdef __CC_ARM
+#pragma pop
+#endif // __arm__
+
+
+//  ==== RTX Extensions ====
+
+// Service Calls declarations
+SVC_0_1(rt_suspend, uint32_t, RET_uint32_t)
+SVC_1_0(rt_resume,  void,     uint32_t)
+
+
+// Public API
+
+/// Suspends the OS task scheduler
+uint32_t os_suspend (void) {
+  return __rt_suspend();
+}
+
+/// Resumes the OS task scheduler
+void os_resume (uint32_t sleep_time) {
+  __rt_resume(sleep_time);
+}
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Event.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Event.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,194 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_EVENT.C
+ *      Purpose: Implements waits and wake-ups for event flags
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_Event.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#ifdef __CORTEX_A9
+#include "rt_HAL_CA.h"
+#else
+#include "rt_HAL_CM.h"
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_evt_wait -----------------------------------*/
+
+OS_RESULT rt_evt_wait (U16 wait_flags, U16 timeout, BOOL and_wait) {
+  /* Wait for one or more event flags with optional time-out.                */
+  /* "wait_flags" identifies the flags to wait for.                          */
+  /* "timeout" is the time-out limit in system ticks (0xffff if no time-out) */
+  /* "and_wait" specifies the AND-ing of "wait_flags" as condition to be met */
+  /* to complete the wait. (OR-ing if set to 0).                             */
+  U32 block_state;
+
+  if (and_wait) {
+    /* Check for AND-connected events */
+    if ((os_tsk.run->events & wait_flags) == wait_flags) {
+      os_tsk.run->events &= ~wait_flags;
+      return (OS_R_EVT);
+    }
+    block_state = WAIT_AND;
+  }
+  else {
+    /* Check for OR-connected events */
+    if (os_tsk.run->events & wait_flags) {
+      os_tsk.run->waits = os_tsk.run->events & wait_flags;
+      os_tsk.run->events &= ~wait_flags;
+      return (OS_R_EVT);
+    }
+    block_state = WAIT_OR;
+  }
+  /* Task has to wait */
+  os_tsk.run->waits = wait_flags;
+  rt_block (timeout, (U8)block_state);
+  return (OS_R_TMO);
+}
+
+
+/*--------------------------- rt_evt_set ------------------------------------*/
+
+void rt_evt_set (U16 event_flags, OS_TID task_id) {
+  /* Set one or more event flags of a selectable task. */
+  P_TCB p_tcb;
+
+  p_tcb = os_active_TCB[task_id-1];
+  if (p_tcb == NULL) {
+    return;
+  }
+  p_tcb->events |= event_flags;
+  event_flags    = p_tcb->waits;
+  /* If the task is not waiting for an event, it should not be put */
+  /* to ready state. */
+  if (p_tcb->state == WAIT_AND) {
+    /* Check for AND-connected events */
+    if ((p_tcb->events & event_flags) == event_flags) {
+      goto wkup;
+    }
+  }
+  if (p_tcb->state == WAIT_OR) {
+    /* Check for OR-connected events */
+    if (p_tcb->events & event_flags) {
+      p_tcb->waits  &= p_tcb->events;
+wkup: p_tcb->events &= ~event_flags;
+      rt_rmv_dly (p_tcb);
+      p_tcb->state   = READY;
+#ifdef __CMSIS_RTOS
+      rt_ret_val2(p_tcb, 0x08/*osEventSignal*/, p_tcb->waits);
+#else
+      rt_ret_val (p_tcb, OS_R_EVT);
+#endif
+      rt_dispatch (p_tcb);
+    }
+  }
+}
+
+
+/*--------------------------- rt_evt_clr ------------------------------------*/
+
+void rt_evt_clr (U16 clear_flags, OS_TID task_id) {
+  /* Clear one or more event flags (identified by "clear_flags") of a */
+  /* selectable task (identified by "task"). */
+  P_TCB task = os_active_TCB[task_id-1];
+
+  if (task == NULL) {
+    return;
+  }
+  task->events &= ~clear_flags;
+}
+
+
+/*--------------------------- isr_evt_set -----------------------------------*/
+
+void isr_evt_set (U16 event_flags, OS_TID task_id) {
+  /* Same function as "os_evt_set", but to be called by ISRs. */
+  P_TCB p_tcb = os_active_TCB[task_id-1];
+
+  if (p_tcb == NULL) {
+    return;
+  }
+  rt_psq_enq (p_tcb, event_flags);
+  rt_psh_req ();
+}
+
+
+/*--------------------------- rt_evt_get ------------------------------------*/
+
+U16 rt_evt_get (void) {
+  /* Get events of a running task after waiting for OR connected events. */
+  return (os_tsk.run->waits);
+}
+
+
+/*--------------------------- rt_evt_psh ------------------------------------*/
+
+void rt_evt_psh (P_TCB p_CB, U16 set_flags) {
+  /* Check if task has to be waken up */
+  U16 event_flags;
+
+  p_CB->events |= set_flags;
+  event_flags = p_CB->waits;
+  if (p_CB->state == WAIT_AND) {
+    /* Check for AND-connected events */
+    if ((p_CB->events & event_flags) == event_flags) {
+      goto rdy;
+    }
+  }
+  if (p_CB->state == WAIT_OR) {
+    /* Check for OR-connected events */
+    if (p_CB->events & event_flags) {
+      p_CB->waits  &= p_CB->events;
+rdy:  p_CB->events &= ~event_flags;
+      rt_rmv_dly (p_CB);
+      p_CB->state   = READY;
+#ifdef __CMSIS_RTOS
+      rt_ret_val2(p_CB, 0x08/*osEventSignal*/, p_CB->waits);
+#else
+      rt_ret_val (p_CB, OS_R_EVT);
+#endif
+      rt_put_prio (&os_rdy, p_CB);
+    }
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Event.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Event.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,46 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_EVENT.H
+ *      Purpose: Implements waits and wake-ups for event flags
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+extern OS_RESULT rt_evt_wait (U16 wait_flags,  U16 timeout, BOOL and_wait);
+extern void      rt_evt_set  (U16 event_flags, OS_TID task_id);
+extern void      rt_evt_clr  (U16 clear_flags, OS_TID task_id);
+extern void      isr_evt_set (U16 event_flags, OS_TID task_id);
+extern U16       rt_evt_get  (void);
+extern void      rt_evt_psh  (P_TCB p_CB, U16 set_flags);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_HAL_CA.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_HAL_CA.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,242 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_HAL_CA.H
+ *      Purpose: Hardware Abstraction Layer for Cortex-A definitions
+ *      Rev.:    14th Jan 2014
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Definitions */
+#define INIT_CPSR_SYS   0x4000001F
+#define INIT_CPSR_USER  0x40000010
+
+#define CPSR_T_BIT      0x20
+#define CPSR_I_BIT      0x80
+#define CPSR_F_BIT      0x40
+
+#define MODE_USR        0x10
+#define MODE_FIQ        0x11
+#define MODE_IRQ        0x12
+#define MODE_SVC        0x13
+#define MODE_ABT        0x17
+#define MODE_UND        0x1B
+#define MODE_SYS        0x1F
+
+#define MAGIC_WORD      0xE25A2EA5
+
+#include "core_ca9.h"
+
+#if defined (__CC_ARM)          /* ARM Compiler */
+
+#if ((__TARGET_ARCH_7_M || __TARGET_ARCH_7E_M || __TARGET_ARCH_7_A) && !defined(NO_EXCLUSIVE_ACCESS))
+ #define __USE_EXCLUSIVE_ACCESS
+#else
+ #undef  __USE_EXCLUSIVE_ACCESS
+#endif
+
+/* Supress __ldrex and __strex deprecated warnings - "#3731-D: intrinsic is deprecated" */
+#ifdef __USE_EXCLUSIVE_ACCESS
+#pragma diag_suppress 3731
+#endif
+
+#elif defined (__GNUC__)        /* GNU Compiler */
+
+#undef  __USE_EXCLUSIVE_ACCESS
+
+#if defined (__VFP_FP__) && !defined(__SOFTFP__)
+#define __TARGET_FPU_VFP 1
+#else
+#define __TARGET_FPU_VFP 0
+#endif
+
+#define __inline inline
+#define __weak   __attribute__((weak))
+
+#elif defined (__ICCARM__)      /* IAR Compiler */
+
+#endif
+
+static U8 priority = 0xff;
+
+extern const U32 GICDistributor_BASE;
+extern const U32 GICInterface_BASE;
+
+/* GIC registers - Distributor */
+#define GICD_ICDICER0   (*((volatile U32 *)(GICDistributor_BASE + 0x180))) /* - RW - Interrupt Clear-Enable Registers */
+#define GICD_ICDISER0   (*((volatile U32 *)(GICDistributor_BASE + 0x100))) /* - RW - Interrupt Set-Enable Registers */
+#define GICD_ICDIPR0    (*((volatile U32 *)(GICDistributor_BASE + 0x400))) /* - RW - Interrupt Priority Registers */
+#define GICD_ICDSGIR    (*((volatile U32 *)(GICDistributor_BASE + 0xf00))) /* - RW - Interrupt Software Interrupt Register */
+#define GICD_ICDICERx(irq)   *(volatile U32 *)(&GICD_ICDICER0 + irq/32)
+#define GICD_ICDISERx(irq)   *(volatile U32 *)(&GICD_ICDISER0 + irq/32)
+
+/* GIC register  - CPU Interface  */
+#define GICI_ICCPMR     (*((volatile U32 *)(GICInterface_BASE + 0x004))) /* - RW - Interrupt Priority Mask Register */
+
+#define SGI_PENDSV      0 /* SGI0 */
+#define SGI_PENDSV_BIT  ((U32)(1 << (SGI_PENDSV & 0xf)))
+
+//Increase priority filter to prevent timer and PendSV interrupts signaling. Guarantees that interrupts will not be forwarded.
+#if defined (__ICCARM__)
+#define OS_LOCK() int irq_dis = __disable_irq_iar();\
+                  priority = GICI_ICCPMR; \
+                  GICI_ICCPMR = 0xff; \
+                  GICI_ICCPMR = GICI_ICCPMR - 1; \
+                  __DSB();\
+                  if(!irq_dis) __enable_irq(); \
+
+#else
+#define OS_LOCK() int irq_dis = __disable_irq();\
+                  priority = GICI_ICCPMR; \
+                  GICI_ICCPMR = 0xff; \
+                  GICI_ICCPMR = GICI_ICCPMR - 1; \
+                  __DSB();\
+                  if(!irq_dis) __enable_irq(); \
+
+#endif
+
+//Restore priority filter. Re-enable timer and PendSV signaling
+#define OS_UNLOCK() __DSB(); \
+                    GICI_ICCPMR = priority; \
+
+#define OS_PEND_IRQ() GICD_ICDSGIR = 0x0010000 | SGI_PENDSV
+#define OS_PEND(fl,p) if(p) OS_PEND_IRQ();
+#define OS_UNPEND(fl)
+
+/* HW initialization needs to be done in os_tick_init (void) -RTX_Conf_CM.c-
+ * OS_X_INIT enables the IRQ n in the GIC */
+#define OS_X_INIT(n) volatile char *reg; \
+                     reg = (char *)(&GICD_ICDIPR0 + n / 4); \
+                     reg += n % 4; \
+                     *reg = (char)0xff; \
+                     *reg = *reg - 1; \
+                     GICD_ICDISERx(n) = (U32)(1 << n % 32);
+#define OS_X_LOCK(n) OS_LOCK()
+#define OS_X_UNLOCK(n) OS_UNLOCK()
+#define OS_X_PEND_IRQ() OS_PEND_IRQ()
+#define OS_X_PEND(fl,p) if(p) OS_X_PEND_IRQ();
+#define OS_X_UNPEND(fl)
+
+
+/* Functions */
+#ifdef __USE_EXCLUSIVE_ACCESS
+ #define rt_inc(p)     while(__strex((__ldrex(p)+1),p))
+ #define rt_dec(p)     while(__strex((__ldrex(p)-1),p))
+#else
+#if defined (__ICCARM__)
+ #define rt_inc(p)     { int irq_dis = __disable_irq_iar();(*p)++;if(!irq_dis) __enable_irq(); }
+ #define rt_dec(p)     { int irq_dis = __disable_irq_iar();(*p)--;if(!irq_dis) __enable_irq(); }
+#else
+ #define rt_inc(p)     { int irq_dis = __disable_irq();(*p)++;if(!irq_dis) __enable_irq(); }
+ #define rt_dec(p)     { int irq_dis = __disable_irq();(*p)--;if(!irq_dis) __enable_irq(); }
+#endif /* __ICCARM__ */
+#endif /* __USE_EXCLUSIVE_ACCESS */
+
+__inline static U32 rt_inc_qi (U32 size, U8 *count, U8 *first) {
+  U32 cnt,c2;
+#ifdef __USE_EXCLUSIVE_ACCESS
+  do {
+    if ((cnt = __ldrex(count)) == size) {
+      __clrex();
+      return (cnt); }
+  } while (__strex(cnt+1, count));
+  do {
+    c2 = (cnt = __ldrex(first)) + 1;
+    if (c2 == size) c2 = 0;
+  } while (__strex(c2, first));
+#else
+  int irq_dis;
+ #if defined (__ICCARM__)
+  irq_dis = __disable_irq_iar();
+ #else
+  irq_dis = __disable_irq();
+ #endif /* __ICCARM__ */
+  if ((cnt = *count) < size) {
+    *count = cnt+1;
+    c2 = (cnt = *first) + 1;
+    if (c2 == size) c2 = 0;
+    *first = c2;
+  }
+  if(!irq_dis) __enable_irq ();
+#endif
+  return (cnt);
+}
+
+__inline static void rt_systick_init (void) {
+  /* Cortex-A doesn't have a Systick. User needs to provide an alternative timer using RTX_Conf_CM configuration */
+  /* HW initialization needs to be done in os_tick_init (void) -RTX_Conf_CM.c- */
+}
+
+__inline static U32 rt_systick_val (void) {
+  /* Cortex-A doesn't have a Systick. User needs to provide an alternative timer using RTX_Conf_CM configuration */
+  /* HW initialization needs to be done in os_tick_init (void) -RTX_Conf_CM.c- */
+  return 0;
+}
+
+__inline static U32 rt_systick_ovf (void) {
+  /* Cortex-A doesn't have a Systick. User needs to provide an alternative timer using RTX_Conf_CM configuration */
+  /* HW initialization needs to be done in os_tick_init (void) -RTX_Conf_CM.c- */
+  return 0;
+}
+
+__inline static void rt_svc_init (void) {
+  /* Register pendSV - through SGI */
+  volatile char *reg;
+
+  reg = (char *)(&GICD_ICDIPR0 + SGI_PENDSV/4);
+  reg += SGI_PENDSV % 4;
+  /* Write 0xff to read priority level */
+  *reg = (char)0xff;
+  /* Read priority level and set the lowest possible*/
+  *reg = *reg - 1;
+
+  GICD_ICDISERx(SGI_PENDSV) = (U32)SGI_PENDSV_BIT;
+}
+
+extern void rt_set_PSP (U32 stack);
+extern U32  rt_get_PSP (void);
+extern void os_set_env (P_TCB p_TCB);
+extern void *_alloc_box (void *box_mem);
+extern int  _free_box (void *box_mem, void *box);
+
+extern void rt_init_stack (P_TCB p_TCB, FUNCP task_body);
+extern void rt_ret_val  (P_TCB p_TCB, U32 v0);
+extern void rt_ret_val2 (P_TCB p_TCB, U32 v0, U32 v1);
+
+extern void dbg_init (void);
+extern void dbg_task_notify (P_TCB p_tcb, BOOL create);
+extern void dbg_task_switch (U32 task_id);
+
+#define DBG_INIT()
+#define DBG_TASK_NOTIFY(p_tcb,create)
+#define DBG_TASK_SWITCH(task_id)
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_HAL_CM.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_HAL_CM.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,289 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_HAL_CM.H
+ *      Purpose: Hardware Abstraction Layer for Cortex-M definitions
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Definitions */
+#define INITIAL_xPSR    0x01000000
+#define DEMCR_TRCENA    0x01000000
+#define ITM_ITMENA      0x00000001
+#define MAGIC_WORD      0xE25A2EA5
+
+#if defined (__CC_ARM)          /* ARM Compiler */
+
+#if ((__TARGET_ARCH_7_M || __TARGET_ARCH_7E_M) && !defined(NO_EXCLUSIVE_ACCESS))
+ #define __USE_EXCLUSIVE_ACCESS
+#else
+ #undef  __USE_EXCLUSIVE_ACCESS
+#endif
+
+/* Supress __ldrex and __strex deprecated warnings - "#3731-D: intrinsic is deprecated" */
+#ifdef __USE_EXCLUSIVE_ACCESS
+#pragma diag_suppress 3731
+#endif
+
+#elif defined (__GNUC__)        /* GNU Compiler */
+
+#undef  __USE_EXCLUSIVE_ACCESS
+
+#if defined (__CORTEX_M0)
+#define __TARGET_ARCH_6S_M 1
+#else
+#define __TARGET_ARCH_6S_M 0
+#endif
+
+#if defined (__VFP_FP__) && !defined(__SOFTFP__)
+#define __TARGET_FPU_VFP 1
+#else
+#define __TARGET_FPU_VFP 0
+#endif
+
+#define __inline inline
+#define __weak   __attribute__((weak))
+
+#ifndef __CMSIS_GENERIC
+
+__attribute__((always_inline)) static inline void __enable_irq(void)
+{
+  __asm volatile ("cpsie i");
+}
+
+__attribute__((always_inline)) static inline U32 __disable_irq(void)
+{
+  U32 result;
+
+  __asm volatile ("mrs %0, primask" : "=r" (result));
+  __asm volatile ("cpsid i");
+  return(result & 1);
+}
+
+#endif
+
+__attribute__(( always_inline)) static inline U8 __clz(U32 value)
+{
+  U8 result;
+
+  __asm volatile ("clz %0, %1" : "=r" (result) : "r" (value));
+  return(result);
+}
+
+#elif defined (__ICCARM__)      /* IAR Compiler */
+
+#undef  __USE_EXCLUSIVE_ACCESS
+
+#if (__CORE__ == __ARM6M__)
+#define __TARGET_ARCH_6S_M 1
+#else
+#define __TARGET_ARCH_6S_M 0
+#endif
+
+#if defined __ARMVFP__
+#define __TARGET_FPU_VFP 1
+#else
+#define __TARGET_FPU_VFP 0
+#endif
+
+#define __inline inline
+
+#ifndef __CMSIS_GENERIC
+
+static inline void __enable_irq(void)
+{
+  __asm volatile ("cpsie i");
+}
+
+static inline U32 __disable_irq(void)
+{
+  U32 result;
+
+  __asm volatile ("mrs %0, primask" : "=r" (result));
+  __asm volatile ("cpsid i");
+  return(result & 1);
+}
+
+#endif
+
+static inline U8 __clz(U32 value)
+{
+  U8 result;
+
+  __asm volatile ("clz %0, %1" : "=r" (result) : "r" (value));
+  return(result);
+}
+
+#endif
+
+/* NVIC registers */
+#define NVIC_ST_CTRL    (*((volatile U32 *)0xE000E010))
+#define NVIC_ST_RELOAD  (*((volatile U32 *)0xE000E014))
+#define NVIC_ST_CURRENT (*((volatile U32 *)0xE000E018))
+#define NVIC_ISER         ((volatile U32 *)0xE000E100)
+#define NVIC_ICER         ((volatile U32 *)0xE000E180)
+#if (__TARGET_ARCH_6S_M)
+#define NVIC_IP           ((volatile U32 *)0xE000E400)
+#else
+#define NVIC_IP           ((volatile U8  *)0xE000E400)
+#endif
+#define NVIC_INT_CTRL   (*((volatile U32 *)0xE000ED04))
+#define NVIC_AIR_CTRL   (*((volatile U32 *)0xE000ED0C))
+#define NVIC_SYS_PRI2   (*((volatile U32 *)0xE000ED1C))
+#define NVIC_SYS_PRI3   (*((volatile U32 *)0xE000ED20))
+
+#define OS_PEND_IRQ()   NVIC_INT_CTRL  = (1<<28)
+#define OS_PENDING      ((NVIC_INT_CTRL >> 26) & (1<<2 | 1))
+#define OS_UNPEND(fl)   NVIC_INT_CTRL  = (*fl = OS_PENDING) << 25
+#define OS_PEND(fl,p)   NVIC_INT_CTRL  = (fl | p<<2) << 26
+#define OS_LOCK()       NVIC_ST_CTRL   =  0x0005
+#define OS_UNLOCK()     NVIC_ST_CTRL   =  0x0007
+
+#define OS_X_PENDING    ((NVIC_INT_CTRL >> 28) & 1)
+#define OS_X_UNPEND(fl) NVIC_INT_CTRL  = (*fl = OS_X_PENDING) << 27
+#define OS_X_PEND(fl,p) NVIC_INT_CTRL  = (fl | p) << 28
+#if (__TARGET_ARCH_6S_M)
+#define OS_X_INIT(n)    NVIC_IP[n>>2] |= 0xFF << (8*(n & 0x03)); \
+                        NVIC_ISER[n>>5] = 1 << (n & 0x1F)
+#else
+#define OS_X_INIT(n)    NVIC_IP[n] = 0xFF; \
+                        NVIC_ISER[n>>5] = 1 << (n & 0x1F)
+#endif
+#define OS_X_LOCK(n)    NVIC_ICER[n>>5] = 1 << (n & 0x1F)
+#define OS_X_UNLOCK(n)  NVIC_ISER[n>>5] = 1 << (n & 0x1F)
+
+/* Core Debug registers */
+#define DEMCR           (*((volatile U32 *)0xE000EDFC))
+
+/* ITM registers */
+#define ITM_CONTROL     (*((volatile U32 *)0xE0000E80))
+#define ITM_ENABLE      (*((volatile U32 *)0xE0000E00))
+#define ITM_PORT30_U32  (*((volatile U32 *)0xE0000078))
+#define ITM_PORT31_U32  (*((volatile U32 *)0xE000007C))
+#define ITM_PORT31_U16  (*((volatile U16 *)0xE000007C))
+#define ITM_PORT31_U8   (*((volatile U8  *)0xE000007C))
+
+/* Variables */
+extern BIT dbg_msg;
+
+/* Functions */
+#ifdef __USE_EXCLUSIVE_ACCESS
+ #define rt_inc(p)     while(__strex((__ldrex(p)+1),p))
+ #define rt_dec(p)     while(__strex((__ldrex(p)-1),p))
+#else
+ #define rt_inc(p)     __disable_irq();(*p)++;__enable_irq();
+ #define rt_dec(p)     __disable_irq();(*p)--;__enable_irq();
+#endif
+
+__inline static U32 rt_inc_qi (U32 size, U8 *count, U8 *first) {
+  U32 cnt,c2;
+#ifdef __USE_EXCLUSIVE_ACCESS
+  do {
+    if ((cnt = __ldrex(count)) == size) {
+      __clrex();
+      return (cnt); }
+  } while (__strex(cnt+1, count));
+  do {
+    c2 = (cnt = __ldrex(first)) + 1;
+    if (c2 == size) c2 = 0;
+  } while (__strex(c2, first));
+#else
+  __disable_irq();
+  if ((cnt = *count) < size) {
+    *count = cnt+1;
+    c2 = (cnt = *first) + 1;
+    if (c2 == size) c2 = 0;
+    *first = c2;
+  }
+  __enable_irq ();
+#endif
+  return (cnt);
+}
+
+__inline static void rt_systick_init (void) {
+  NVIC_ST_RELOAD  = os_trv;
+  NVIC_ST_CURRENT = 0;
+  NVIC_ST_CTRL    = 0x0007;
+  NVIC_SYS_PRI3  |= 0xFF000000;
+}
+
+__inline static U32 rt_systick_val (void) {
+  return (os_trv - NVIC_ST_CURRENT);
+}
+
+__inline static U32 rt_systick_ovf (void) {
+  return ((NVIC_INT_CTRL >> 26) & 1);
+}
+
+__inline static void rt_svc_init (void) {
+#if !(__TARGET_ARCH_6S_M)
+  int sh,prigroup;
+#endif
+  NVIC_SYS_PRI3 |= 0x00FF0000;
+#if (__TARGET_ARCH_6S_M)
+  NVIC_SYS_PRI2 |= (NVIC_SYS_PRI3<<(8+1)) & 0xFC000000;
+#else
+  sh       = 8 - __clz (~((NVIC_SYS_PRI3 << 8) & 0xFF000000));
+  prigroup = ((NVIC_AIR_CTRL >> 8) & 0x07);
+  if (prigroup >= sh) {
+    sh = prigroup + 1;
+  }
+  NVIC_SYS_PRI2 = ((0xFEFFFFFF << sh) & 0xFF000000) | (NVIC_SYS_PRI2 & 0x00FFFFFF);
+#endif
+}
+
+extern void rt_set_PSP (U32 stack);
+extern U32  rt_get_PSP (void);
+extern void os_set_env (void);
+extern void *_alloc_box (void *box_mem);
+extern int  _free_box (void *box_mem, void *box);
+
+extern void rt_init_stack (P_TCB p_TCB, FUNCP task_body);
+extern void rt_ret_val  (P_TCB p_TCB, U32 v0);
+extern void rt_ret_val2 (P_TCB p_TCB, U32 v0, U32 v1);
+
+extern void dbg_init (void);
+extern void dbg_task_notify (P_TCB p_tcb, BOOL create);
+extern void dbg_task_switch (U32 task_id);
+
+#ifdef DBG_MSG
+#define DBG_INIT() dbg_init()
+#define DBG_TASK_NOTIFY(p_tcb,create) if (dbg_msg) dbg_task_notify(p_tcb,create)
+#define DBG_TASK_SWITCH(task_id)      if (dbg_msg && (os_tsk.new_tsk!=os_tsk.run)) \
+                                                   dbg_task_switch(task_id)
+#else
+#define DBG_INIT()
+#define DBG_TASK_NOTIFY(p_tcb,create)
+#define DBG_TASK_SWITCH(task_id)
+#endif
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_List.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_List.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,324 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_LIST.C
+ *      Purpose: Functions for the management of different lists
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#include "rt_Time.h"
+#ifdef __CORTEX_A9
+#include "rt_HAL_CA.h"
+#else
+#include "rt_HAL_CM.h"
+#endif
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+/* List head of chained ready tasks */
+struct OS_XCB  os_rdy;
+/* List head of chained delay tasks */
+struct OS_XCB  os_dly;
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_put_prio -----------------------------------*/
+
+void rt_put_prio (P_XCB p_CB, P_TCB p_task) {
+  /* Put task identified with "p_task" into list ordered by priority.       */
+  /* "p_CB" points to head of list; list has always an element at end with  */
+  /* a priority less than "p_task->prio".                                   */
+  P_TCB p_CB2;
+  U32 prio;
+  BOOL sem_mbx = __FALSE;
+
+  if (p_CB->cb_type == SCB || p_CB->cb_type == MCB || p_CB->cb_type == MUCB) {
+    sem_mbx = __TRUE;
+  }
+  prio = p_task->prio;
+  p_CB2 = p_CB->p_lnk;
+  /* Search for an entry in the list */
+  while (p_CB2 != NULL && prio <= p_CB2->prio) {
+    p_CB = (P_XCB)p_CB2;
+    p_CB2 = p_CB2->p_lnk;
+  }
+  /* Entry found, insert the task into the list */
+  p_task->p_lnk = p_CB2;
+  p_CB->p_lnk = p_task;
+  if (sem_mbx) {
+    if (p_CB2 != NULL) {
+      p_CB2->p_rlnk = p_task;
+    }
+    p_task->p_rlnk = (P_TCB)p_CB;
+  }
+  else {
+    p_task->p_rlnk = NULL;
+  }
+}
+
+
+/*--------------------------- rt_get_first ----------------------------------*/
+
+P_TCB rt_get_first (P_XCB p_CB) {
+  /* Get task at head of list: it is the task with highest priority. */
+  /* "p_CB" points to head of list. */
+  P_TCB p_first;
+
+  p_first = p_CB->p_lnk;
+  p_CB->p_lnk = p_first->p_lnk;
+  if (p_CB->cb_type == SCB || p_CB->cb_type == MCB || p_CB->cb_type == MUCB) {
+    if (p_first->p_lnk != NULL) {
+      p_first->p_lnk->p_rlnk = (P_TCB)p_CB;
+      p_first->p_lnk = NULL;
+    }
+    p_first->p_rlnk = NULL;
+  }
+  else {
+    p_first->p_lnk = NULL;
+  }
+  return (p_first);
+}
+
+
+/*--------------------------- rt_put_rdy_first ------------------------------*/
+
+void rt_put_rdy_first (P_TCB p_task) {
+  /* Put task identified with "p_task" at the head of the ready list. The   */
+  /* task must have at least a priority equal to highest priority in list.  */
+  p_task->p_lnk = os_rdy.p_lnk;
+  p_task->p_rlnk = NULL;
+  os_rdy.p_lnk = p_task;
+}
+
+
+/*--------------------------- rt_get_same_rdy_prio --------------------------*/
+
+P_TCB rt_get_same_rdy_prio (void) {
+  /* Remove a task of same priority from ready list if any exists. Other-   */
+  /* wise return NULL.                                                      */
+  P_TCB p_first;
+
+  p_first = os_rdy.p_lnk;
+  if (p_first->prio == os_tsk.run->prio) {
+    os_rdy.p_lnk = os_rdy.p_lnk->p_lnk;
+    return (p_first);
+  }
+  return (NULL);
+}
+
+
+/*--------------------------- rt_resort_prio --------------------------------*/
+
+void rt_resort_prio (P_TCB p_task) {
+  /* Re-sort ordered lists after the priority of 'p_task' has changed.      */
+  P_TCB p_CB;
+
+  if (p_task->p_rlnk == NULL) {
+    if (p_task->state == READY) {
+      /* Task is chained into READY list. */
+      p_CB = (P_TCB)&os_rdy;
+      goto res;
+    }
+  }
+  else {
+    p_CB = p_task->p_rlnk;
+    while (p_CB->cb_type == TCB) {
+      /* Find a header of this task chain list. */
+      p_CB = p_CB->p_rlnk;
+    }
+res:rt_rmv_list (p_task);
+    rt_put_prio ((P_XCB)p_CB, p_task);
+  }
+}
+
+
+/*--------------------------- rt_put_dly ------------------------------------*/
+
+void rt_put_dly (P_TCB p_task, U16 delay) {
+  /* Put a task identified with "p_task" into chained delay wait list using */
+  /* a delay value of "delay".                                              */
+  P_TCB p;
+  U32 delta,idelay = delay;
+
+  p = (P_TCB)&os_dly;
+  if (p->p_dlnk == NULL) {
+    /* Delay list empty */
+    delta = 0;
+    goto last;
+  }
+  delta = os_dly.delta_time;
+  while (delta < idelay) {
+    if (p->p_dlnk == NULL) {
+      /* End of list found */
+last: p_task->p_dlnk = NULL;
+      p->p_dlnk = p_task;
+      p_task->p_blnk = p;
+      p->delta_time = (U16)(idelay - delta);
+      p_task->delta_time = 0;
+      return;
+    }
+    p = p->p_dlnk;
+    delta += p->delta_time;
+  }
+  /* Right place found */
+  p_task->p_dlnk = p->p_dlnk;
+  p->p_dlnk = p_task;
+  p_task->p_blnk = p;
+  if (p_task->p_dlnk != NULL) {
+    p_task->p_dlnk->p_blnk = p_task;
+  }
+  p_task->delta_time = (U16)(delta - idelay);
+  p->delta_time -= p_task->delta_time;
+}
+
+
+/*--------------------------- rt_dec_dly ------------------------------------*/
+
+void rt_dec_dly (void) {
+  /* Decrement delta time of list head: remove tasks having a value of zero.*/
+  P_TCB p_rdy;
+
+  if (os_dly.p_dlnk == NULL) {
+    return;
+  }
+  os_dly.delta_time--;
+  while ((os_dly.delta_time == 0) && (os_dly.p_dlnk != NULL)) {
+    p_rdy = os_dly.p_dlnk;
+    if (p_rdy->p_rlnk != NULL) {
+      /* Task is really enqueued, remove task from semaphore/mailbox */
+      /* timeout waiting list. */
+      p_rdy->p_rlnk->p_lnk = p_rdy->p_lnk;
+      if (p_rdy->p_lnk != NULL) {
+        p_rdy->p_lnk->p_rlnk = p_rdy->p_rlnk;
+        p_rdy->p_lnk = NULL;
+      }
+      p_rdy->p_rlnk = NULL;
+    }
+    rt_put_prio (&os_rdy, p_rdy);
+    os_dly.delta_time = p_rdy->delta_time;
+    if (p_rdy->state == WAIT_ITV) {
+      /* Calculate the next time for interval wait. */
+      p_rdy->delta_time = p_rdy->interval_time + (U16)os_time;
+    }
+    p_rdy->state   = READY;
+    os_dly.p_dlnk = p_rdy->p_dlnk;
+    if (p_rdy->p_dlnk != NULL) {
+      p_rdy->p_dlnk->p_blnk =  (P_TCB)&os_dly;
+      p_rdy->p_dlnk = NULL;
+    }
+    p_rdy->p_blnk = NULL;
+  }
+}
+
+
+/*--------------------------- rt_rmv_list -----------------------------------*/
+
+void rt_rmv_list (P_TCB p_task) {
+  /* Remove task identified with "p_task" from ready, semaphore or mailbox  */
+  /* waiting list if enqueued.                                              */
+  P_TCB p_b;
+
+  if (p_task->p_rlnk != NULL) {
+    /* A task is enqueued in semaphore / mailbox waiting list. */
+    p_task->p_rlnk->p_lnk = p_task->p_lnk;
+    if (p_task->p_lnk != NULL) {
+      p_task->p_lnk->p_rlnk = p_task->p_rlnk;
+    }
+    return;
+  }
+
+  p_b = (P_TCB)&os_rdy;
+  while (p_b != NULL) {
+    /* Search the ready list for task "p_task" */
+    if (p_b->p_lnk == p_task) {
+      p_b->p_lnk = p_task->p_lnk;
+      return;
+    }
+    p_b = p_b->p_lnk;
+  }
+}
+
+
+/*--------------------------- rt_rmv_dly ------------------------------------*/
+
+void rt_rmv_dly (P_TCB p_task) {
+  /* Remove task identified with "p_task" from delay list if enqueued.      */
+  P_TCB p_b;
+
+  p_b = p_task->p_blnk;
+  if (p_b != NULL) {
+    /* Task is really enqueued */
+    p_b->p_dlnk = p_task->p_dlnk;
+    if (p_task->p_dlnk != NULL) {
+      /* 'p_task' is in the middle of list */
+      p_b->delta_time += p_task->delta_time;
+      p_task->p_dlnk->p_blnk = p_b;
+      p_task->p_dlnk = NULL;
+    }
+    else {
+      /* 'p_task' is at the end of list */
+      p_b->delta_time = 0;
+    }
+    p_task->p_blnk = NULL;
+  }
+}
+
+
+/*--------------------------- rt_psq_enq ------------------------------------*/
+
+void rt_psq_enq (OS_ID entry, U32 arg) {
+  /* Insert post service request "entry" into ps-queue. */
+  U32 idx;
+
+  idx = rt_inc_qi (os_psq->size, &os_psq->count, &os_psq->first);
+  if (idx < os_psq->size) {
+    os_psq->q[idx].id  = entry;
+    os_psq->q[idx].arg = arg;
+  }
+  else {
+    os_error (OS_ERR_FIFO_OVF);
+  }
+}
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_List.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_List.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,67 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_LIST.H
+ *      Purpose: Functions for the management of different lists
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Definitions */
+
+/* Values for 'cb_type' */
+#define TCB             0
+#define MCB             1
+#define SCB             2
+#define MUCB            3
+#define HCB             4
+
+/* Variables */
+extern struct OS_XCB os_rdy;
+extern struct OS_XCB os_dly;
+
+/* Functions */
+extern void  rt_put_prio      (P_XCB p_CB, P_TCB p_task);
+extern P_TCB rt_get_first     (P_XCB p_CB);
+extern void  rt_put_rdy_first (P_TCB p_task);
+extern P_TCB rt_get_same_rdy_prio (void);
+extern void  rt_resort_prio   (P_TCB p_task);
+extern void  rt_put_dly       (P_TCB p_task, U16 delay);
+extern void  rt_dec_dly       (void);
+extern void  rt_rmv_list      (P_TCB p_task);
+extern void  rt_rmv_dly       (P_TCB p_task);
+extern void  rt_psq_enq       (OS_ID entry, U32 arg);
+
+/* This is a fast macro generating in-line code */
+#define rt_rdy_prio(void) (os_rdy.p_lnk->prio)
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Mailbox.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Mailbox.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,296 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MAILBOX.C
+ *      Purpose: Implements waits and wake-ups for mailbox messages
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_List.h"
+#include "rt_Mailbox.h"
+#include "rt_MemBox.h"
+#include "rt_Task.h"
+#ifdef __CORTEX_A9
+#include "rt_HAL_CA.h"
+#else
+#include "rt_HAL_CM.h"
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_mbx_init -----------------------------------*/
+
+void rt_mbx_init (OS_ID mailbox, U16 mbx_size) {
+  /* Initialize a mailbox */
+  P_MCB p_MCB = mailbox;
+
+  p_MCB->cb_type = MCB;
+  p_MCB->state   = 0;
+  p_MCB->isr_st  = 0;
+  p_MCB->p_lnk   = NULL;
+  p_MCB->first   = 0;
+  p_MCB->last    = 0;
+  p_MCB->count   = 0;
+  p_MCB->size    = (mbx_size + sizeof(void *) - sizeof(struct OS_MCB)) /
+                                                     (U32)sizeof (void *);
+}
+
+
+/*--------------------------- rt_mbx_send -----------------------------------*/
+
+OS_RESULT rt_mbx_send (OS_ID mailbox, void *p_msg, U16 timeout) {
+  /* Send message to a mailbox */
+  P_MCB p_MCB = mailbox;
+  P_TCB p_TCB;
+
+  if ((p_MCB->p_lnk != NULL) && (p_MCB->state == 1)) {
+    /* A task is waiting for message */
+    p_TCB = rt_get_first ((P_XCB)p_MCB);
+#ifdef __CMSIS_RTOS
+    rt_ret_val2(p_TCB, 0x10/*osEventMessage*/, (U32)p_msg);
+#else
+    *p_TCB->msg = p_msg;
+    rt_ret_val (p_TCB, OS_R_MBX);
+#endif
+    rt_rmv_dly (p_TCB);
+    rt_dispatch (p_TCB);
+  }
+  else {
+    /* Store message in mailbox queue */
+    if (p_MCB->count == p_MCB->size) {
+      /* No free message entry, wait for one. If message queue is full, */
+      /* then no task is waiting for message. The 'p_MCB->p_lnk' list   */
+      /* pointer can now be reused for send message waits task list.    */
+      if (timeout == 0) {
+        return (OS_R_TMO);
+      }
+      if (p_MCB->p_lnk != NULL) {
+        rt_put_prio ((P_XCB)p_MCB, os_tsk.run);
+      }
+      else {
+        p_MCB->p_lnk = os_tsk.run;
+        os_tsk.run->p_lnk  = NULL;
+        os_tsk.run->p_rlnk = (P_TCB)p_MCB;
+        /* Task is waiting to send a message */
+        p_MCB->state = 2;
+      }
+      os_tsk.run->msg = p_msg;
+      rt_block (timeout, WAIT_MBX);
+      return (OS_R_TMO);
+    }
+    /* Yes, there is a free entry in a mailbox. */
+    p_MCB->msg[p_MCB->first] = p_msg;
+    rt_inc (&p_MCB->count);
+    if (++p_MCB->first == p_MCB->size) {
+      p_MCB->first = 0;
+    }
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_mbx_wait -----------------------------------*/
+
+OS_RESULT rt_mbx_wait (OS_ID mailbox, void **message, U16 timeout) {
+  /* Receive a message; possibly wait for it */
+  P_MCB p_MCB = mailbox;
+  P_TCB p_TCB;
+
+  /* If a message is available in the fifo buffer */
+  /* remove it from the fifo buffer and return. */
+  if (p_MCB->count) {
+    *message = p_MCB->msg[p_MCB->last];
+    if (++p_MCB->last == p_MCB->size) {
+      p_MCB->last = 0;
+    }
+    if ((p_MCB->p_lnk != NULL) && (p_MCB->state == 2)) {
+      /* A task is waiting to send message */
+      p_TCB = rt_get_first ((P_XCB)p_MCB);
+#ifdef __CMSIS_RTOS
+      rt_ret_val(p_TCB, 0/*osOK*/);
+#else
+      rt_ret_val(p_TCB, OS_R_OK);
+#endif
+      p_MCB->msg[p_MCB->first] = p_TCB->msg;
+      if (++p_MCB->first == p_MCB->size) {
+        p_MCB->first = 0;
+      }
+      rt_rmv_dly (p_TCB);
+      rt_dispatch (p_TCB);
+    }
+    else {
+      rt_dec (&p_MCB->count);
+    }
+    return (OS_R_OK);
+  }
+  /* No message available: wait for one */
+  if (timeout == 0) {
+    return (OS_R_TMO);
+  }
+  if (p_MCB->p_lnk != NULL) {
+    rt_put_prio ((P_XCB)p_MCB, os_tsk.run);
+  }
+  else {
+    p_MCB->p_lnk = os_tsk.run;
+    os_tsk.run->p_lnk = NULL;
+    os_tsk.run->p_rlnk = (P_TCB)p_MCB;
+    /* Task is waiting to receive a message */
+    p_MCB->state = 1;
+  }
+  rt_block(timeout, WAIT_MBX);
+#ifndef __CMSIS_RTOS
+  os_tsk.run->msg = message;
+#endif
+  return (OS_R_TMO);
+}
+
+
+/*--------------------------- rt_mbx_check ----------------------------------*/
+
+OS_RESULT rt_mbx_check (OS_ID mailbox) {
+  /* Check for free space in a mailbox. Returns the number of messages     */
+  /* that can be stored to a mailbox. It returns 0 when mailbox is full.   */
+  P_MCB p_MCB = mailbox;
+
+  return (p_MCB->size - p_MCB->count);
+}
+
+
+/*--------------------------- isr_mbx_send ----------------------------------*/
+
+void isr_mbx_send (OS_ID mailbox, void *p_msg) {
+  /* Same function as "os_mbx_send", but to be called by ISRs. */
+  P_MCB p_MCB = mailbox;
+
+  rt_psq_enq (p_MCB, (U32)p_msg);
+  rt_psh_req ();
+}
+
+
+/*--------------------------- isr_mbx_receive -------------------------------*/
+
+OS_RESULT isr_mbx_receive (OS_ID mailbox, void **message) {
+  /* Receive a message in the interrupt function. The interrupt function   */
+  /* should not wait for a message since this would block the rtx os.      */
+  P_MCB p_MCB = mailbox;
+
+  if (p_MCB->count) {
+    /* A message is available in the fifo buffer. */
+    *message = p_MCB->msg[p_MCB->last];
+    if (p_MCB->state == 2) {
+      /* A task is locked waiting to send message */
+      rt_psq_enq (p_MCB, 0);
+      rt_psh_req ();
+    }
+    rt_dec (&p_MCB->count);
+    if (++p_MCB->last == p_MCB->size) {
+      p_MCB->last = 0;
+    }
+    return (OS_R_MBX);
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_mbx_psh ------------------------------------*/
+
+void rt_mbx_psh (P_MCB p_CB, void *p_msg) {
+  /* Store the message to the mailbox queue or pass it to task directly. */
+  P_TCB p_TCB;
+  void *mem;
+
+  if (p_CB->p_lnk != NULL) switch (p_CB->state) {
+#ifdef __CMSIS_RTOS
+    case 3:
+      /* Task is waiting to allocate memory, remove it from the waiting list */
+      mem = rt_alloc_box(p_msg);
+      if (mem == NULL) break;
+      p_TCB = rt_get_first ((P_XCB)p_CB);
+      rt_ret_val(p_TCB, (U32)mem);
+      p_TCB->state = READY;
+      rt_rmv_dly (p_TCB);
+      rt_put_prio (&os_rdy, p_TCB);
+      break;
+#endif
+    case 2:
+      /* Task is waiting to send a message, remove it from the waiting list */
+      p_TCB = rt_get_first ((P_XCB)p_CB);
+#ifdef __CMSIS_RTOS
+      rt_ret_val(p_TCB, 0/*osOK*/);
+#else
+      rt_ret_val(p_TCB, OS_R_OK);
+#endif
+      p_CB->msg[p_CB->first] = p_TCB->msg;
+      rt_inc (&p_CB->count);
+      if (++p_CB->first == p_CB->size) {
+        p_CB->first = 0;
+      }
+      p_TCB->state = READY;
+      rt_rmv_dly (p_TCB);
+      rt_put_prio (&os_rdy, p_TCB);
+      break;
+    case 1:
+      /* Task is waiting for a message, pass the message to the task directly */
+      p_TCB = rt_get_first ((P_XCB)p_CB);
+#ifdef __CMSIS_RTOS
+      rt_ret_val2(p_TCB, 0x10/*osEventMessage*/, (U32)p_msg);
+#else
+      *p_TCB->msg = p_msg;
+      rt_ret_val (p_TCB, OS_R_MBX);
+#endif
+      p_TCB->state = READY;
+      rt_rmv_dly (p_TCB);
+      rt_put_prio (&os_rdy, p_TCB);
+      break;
+  } else {
+    /* No task is waiting for a message, store it to the mailbox queue */
+    if (p_CB->count < p_CB->size) {
+      p_CB->msg[p_CB->first] = p_msg;
+      rt_inc (&p_CB->count);
+      if (++p_CB->first == p_CB->size) {
+        p_CB->first = 0;
+      }
+    }
+    else {
+      os_error (OS_ERR_MBX_OVF);
+    }
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Mailbox.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Mailbox.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,48 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MAILBOX.H
+ *      Purpose: Implements waits and wake-ups for mailbox messages
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+extern void      rt_mbx_init  (OS_ID mailbox, U16 mbx_size);
+extern OS_RESULT rt_mbx_send  (OS_ID mailbox, void *p_msg,    U16 timeout);
+extern OS_RESULT rt_mbx_wait  (OS_ID mailbox, void **message, U16 timeout);
+extern OS_RESULT rt_mbx_check (OS_ID mailbox);
+extern void      isr_mbx_send (OS_ID mailbox, void *p_msg);
+extern OS_RESULT isr_mbx_receive (OS_ID mailbox, void **message);
+extern void      rt_mbx_psh   (P_MCB p_CB,    void *p_msg);
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_MemBox.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_MemBox.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,179 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MEMBOX.C
+ *      Purpose: Interface functions for fixed memory block management system
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_MemBox.h"
+#ifdef __CORTEX_A9
+#include "rt_HAL_CA.h"
+#else
+#include "rt_HAL_CM.h"
+#endif
+
+/*----------------------------------------------------------------------------
+ *      Global Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- _init_box -------------------------------------*/
+
+int _init_box  (void *box_mem, U32 box_size, U32 blk_size) {
+  /* Initialize memory block system, returns 0 if OK, 1 if fails. */
+  void *end;
+  void *blk;
+  void *next;
+  U32  sizeof_bm;
+
+  /* Create memory structure. */
+  if (blk_size & BOX_ALIGN_8) {
+    /* Memory blocks 8-byte aligned. */
+    blk_size = ((blk_size & ~BOX_ALIGN_8) + 7) & ~7;
+    sizeof_bm = (sizeof (struct OS_BM) + 7) & ~7;
+  }
+  else {
+    /* Memory blocks 4-byte aligned. */
+    blk_size = (blk_size + 3) & ~3;
+    sizeof_bm = sizeof (struct OS_BM);
+  }
+  if (blk_size == 0) {
+    return (1);
+  }
+  if ((blk_size + sizeof_bm) > box_size) {
+    return (1);
+  }
+  /* Create a Memory structure. */
+  blk = ((U8 *) box_mem) + sizeof_bm;
+  ((P_BM) box_mem)->free = blk;
+  end = ((U8 *) box_mem) + box_size;
+  ((P_BM) box_mem)->end      = end;
+  ((P_BM) box_mem)->blk_size = blk_size;
+
+  /* Link all free blocks using offsets. */
+  end = ((U8 *) end) - blk_size;
+  while (1)  {
+    next = ((U8 *) blk) + blk_size;
+    if (next > end)  break;
+    *((void **)blk) = next;
+    blk = next;
+  }
+  /* end marker */
+  *((void **)blk) = 0;
+  return (0);
+}
+
+/*--------------------------- rt_alloc_box ----------------------------------*/
+
+void *rt_alloc_box (void *box_mem) {
+  /* Allocate a memory block and return start address. */
+  void **free;
+#ifndef __USE_EXCLUSIVE_ACCESS
+  int  irq_dis;
+
+
+#if defined (__ICCARM__)
+  irq_dis = __disable_irq_iar();
+#else
+  irq_dis = __disable_irq ();
+#endif /* __ICCARM__ */
+  free = ((P_BM) box_mem)->free;
+  if (free) {
+    ((P_BM) box_mem)->free = *free;
+  }
+  if (!irq_dis) __enable_irq ();
+#else
+  do {
+    if ((free = (void **)__ldrex(&((P_BM) box_mem)->free)) == 0) {
+      __clrex();
+      break;
+    }
+  } while (__strex((U32)*free, &((P_BM) box_mem)->free));
+#endif
+  return (free);
+}
+
+
+/*--------------------------- _calloc_box -----------------------------------*/
+
+void *_calloc_box (void *box_mem)  {
+  /* Allocate a 0-initialized memory block and return start address. */
+  void *free;
+  U32 *p;
+  U32 i;
+
+  free = _alloc_box (box_mem);
+  if (free)  {
+    p = free;
+    for (i = ((P_BM) box_mem)->blk_size; i; i -= 4)  {
+      *p = 0;
+      p++;
+    }
+  }
+  return (free);
+}
+
+
+/*--------------------------- rt_free_box -----------------------------------*/
+
+int rt_free_box (void *box_mem, void *box) {
+  /* Free a memory block, returns 0 if OK, 1 if box does not belong to box_mem */
+#ifndef __USE_EXCLUSIVE_ACCESS
+  int irq_dis;
+#endif
+
+  if (box < box_mem || box >= ((P_BM) box_mem)->end) {
+    return (1);
+  }
+
+#ifndef __USE_EXCLUSIVE_ACCESS
+#if defined (__ICCARM__)
+  irq_dis = __disable_irq_iar();
+#else
+  irq_dis = __disable_irq ();
+#endif /* __ICCARM__ */
+  *((void **)box) = ((P_BM) box_mem)->free;
+  ((P_BM) box_mem)->free = box;
+  if (!irq_dis) __enable_irq ();
+#else
+  do {
+    *((void **)box) = (void *)__ldrex(&((P_BM) box_mem)->free);
+  } while (__strex ((U32)box, &((P_BM) box_mem)->free));
+#endif
+  return (0);
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_MemBox.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_MemBox.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,46 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MEMBOX.H
+ *      Purpose: Interface functions for fixed memory block management system
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+#define rt_init_box     _init_box
+#define rt_calloc_box   _calloc_box
+extern int     _init_box   (void *box_mem, U32 box_size, U32 blk_size);
+extern void *rt_alloc_box  (void *box_mem);
+extern void *  _calloc_box (void *box_mem);
+extern int   rt_free_box   (void *box_mem, void *box);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Memory.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Memory.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,140 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MEMORY.C
+ *      Purpose: Interface functions for Dynamic Memory Management System
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "rt_Memory.h"
+
+
+/* Functions */
+
+// Initialize Dynamic Memory pool
+//   Parameters:
+//     pool:    Pointer to memory pool
+//     size:    Size of memory pool in bytes
+//   Return:    0 - OK, 1 - Error
+
+int rt_init_mem (void *pool, U32 size) {
+  MEMP *ptr;
+
+  if ((pool == NULL) || (size < sizeof(MEMP))) return (1);
+
+  ptr = (MEMP *)pool;
+  ptr->next = (MEMP *)((U32)pool + size - sizeof(MEMP *));
+  ptr->next->next = NULL;
+  ptr->len = 0;
+
+  return (0);
+}
+
+// Allocate Memory from Memory pool
+//   Parameters:
+//     pool:    Pointer to memory pool
+//     size:    Size of memory in bytes to allocate
+//   Return:    Pointer to allocated memory
+
+void *rt_alloc_mem (void *pool, U32 size) {
+  MEMP *p, *p_search, *p_new;
+  U32   hole_size;
+
+  if ((pool == NULL) || (size == 0)) return NULL;
+
+  /* Add header offset to 'size' */
+  size += sizeof(MEMP);
+  /* Make sure that block is 4-byte aligned  */
+  size = (size + 3) & ~3;
+
+  p_search = (MEMP *)pool;
+  while (1) {
+    hole_size  = (U32)p_search->next - (U32)p_search;
+    hole_size -= p_search->len;
+    /* Check if hole size is big enough */
+    if (hole_size >= size) break;
+    p_search = p_search->next;
+    if (p_search->next == NULL) {
+      /* Failed, we are at the end of the list */
+      return NULL;
+    }
+  }
+
+  if (p_search->len == 0) {
+    /* No block is allocated, set the Length of the first element */
+    p_search->len = size;
+    p = (MEMP *)(((U32)p_search) + sizeof(MEMP));
+  } else {
+    /* Insert new list element into the memory list */
+    p_new       = (MEMP *)((U32)p_search + p_search->len);
+    p_new->next = p_search->next;
+    p_new->len  = size;
+    p_search->next = p_new;
+    p = (MEMP *)(((U32)p_new) + sizeof(MEMP));
+  }
+
+  return (p);
+}
+
+// Free Memory and return it to Memory pool
+//   Parameters:
+//     pool:    Pointer to memory pool
+//     mem:     Pointer to memory to free
+//   Return:    0 - OK, 1 - Error
+
+int rt_free_mem (void *pool, void *mem) {
+  MEMP *p_search, *p_prev, *p_return;
+
+  if ((pool == NULL) || (mem == NULL)) return (1);
+
+  p_return = (MEMP *)((U32)mem - sizeof(MEMP));
+
+  /* Set list header */
+  p_prev = NULL;
+  p_search = (MEMP *)pool;
+  while (p_search != p_return) {
+    p_prev   = p_search;
+    p_search = p_search->next;
+    if (p_search == NULL) {
+      /* Valid Memory block not found */
+      return (1);
+    }
+  }
+
+  if (p_prev == NULL) {
+    /* First block to be released, only set length to 0 */
+    p_search->len = 0;
+  } else {
+    /* Discard block from chain list */
+    p_prev->next = p_search->next;
+  }
+
+  return (0);
+}
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Memory.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Memory.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,44 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MEMORY.H
+ *      Purpose: Interface functions for Dynamic Memory Management System
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Types */
+typedef struct mem {              /* << Memory Pool management struct >>     */
+  struct mem *next;               /* Next Memory Block in the list           */
+  U32         len;                /* Length of data block                    */
+} MEMP;
+
+/* Functions */
+extern int   rt_init_mem  (void *pool, U32  size);
+extern void *rt_alloc_mem (void *pool, U32  size);
+extern int   rt_free_mem  (void *pool, void *mem);
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Mutex.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Mutex.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,267 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MUTEX.C
+ *      Purpose: Implements mutex synchronization objects
+ *      Rev.:    V4.73
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#include "rt_Mutex.h"
+#ifdef __CORTEX_A9
+#include "rt_HAL_CA.h"
+#else
+#include "rt_HAL_CM.h"
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_mut_init -----------------------------------*/
+
+void rt_mut_init (OS_ID mutex) {
+  /* Initialize a mutex object */
+  P_MUCB p_MCB = mutex;
+
+  p_MCB->cb_type = MUCB;
+  p_MCB->level   = 0;
+  p_MCB->p_lnk   = NULL;
+  p_MCB->owner   = NULL;
+  p_MCB->p_mlnk  = NULL;
+}
+
+
+/*--------------------------- rt_mut_delete ---------------------------------*/
+
+#ifdef __CMSIS_RTOS
+OS_RESULT rt_mut_delete (OS_ID mutex) {
+  /* Delete a mutex object */
+  P_MUCB p_MCB = mutex;
+  P_TCB  p_TCB;
+  P_MUCB p_mlnk;
+  U8     prio;
+
+  __DMB();
+  /* Restore owner task's priority. */
+  if (p_MCB->level != 0) {
+
+    p_TCB = p_MCB->owner;
+
+    /* Remove mutex from task mutex owner list. */
+    p_mlnk = p_TCB->p_mlnk;
+    if (p_mlnk == p_MCB) {
+      p_TCB->p_mlnk = p_MCB->p_mlnk;
+    }
+    else {
+      while (p_mlnk) {
+        if (p_mlnk->p_mlnk == p_MCB) {
+          p_mlnk->p_mlnk = p_MCB->p_mlnk;
+          break;
+        }
+        p_mlnk = p_mlnk->p_mlnk;
+      }
+    }
+
+    /* Restore owner task's priority. */
+    prio = p_TCB->prio_base;
+    p_mlnk = p_TCB->p_mlnk;
+    while (p_mlnk) {
+      if (p_mlnk->p_lnk && (p_mlnk->p_lnk->prio > prio)) {
+        /* A task with higher priority is waiting for mutex. */
+        prio = p_mlnk->p_lnk->prio;
+      }
+      p_mlnk = p_mlnk->p_mlnk;
+    }
+    if (p_TCB->prio != prio) {
+      p_TCB->prio = prio;
+      if (p_TCB != os_tsk.run) {
+        rt_resort_prio (p_TCB);
+    }
+  }
+
+  }
+
+  while (p_MCB->p_lnk != NULL) {
+    /* A task is waiting for mutex. */
+    p_TCB = rt_get_first ((P_XCB)p_MCB);
+    rt_ret_val(p_TCB, 0/*osOK*/);
+    rt_rmv_dly(p_TCB);
+    p_TCB->state = READY;
+    rt_put_prio (&os_rdy, p_TCB);
+  }
+
+  if (os_rdy.p_lnk && (os_rdy.p_lnk->prio > os_tsk.run->prio)) {
+    /* preempt running task */
+    rt_put_prio (&os_rdy, os_tsk.run);
+    os_tsk.run->state = READY;
+    rt_dispatch (NULL);
+  }
+
+  p_MCB->cb_type = 0;
+
+  return (OS_R_OK);
+}
+#endif
+
+
+/*--------------------------- rt_mut_release --------------------------------*/
+
+OS_RESULT rt_mut_release (OS_ID mutex) {
+  /* Release a mutex object */
+  P_MUCB p_MCB = mutex;
+  P_TCB  p_TCB;
+  P_MUCB p_mlnk;
+  U8     prio;
+
+  if (p_MCB->level == 0 || p_MCB->owner != os_tsk.run) {
+    /* Unbalanced mutex release or task is not the owner */
+    return (OS_R_NOK);
+  }
+  __DMB();
+  if (--p_MCB->level != 0) {
+    return (OS_R_OK);
+  }
+
+  /* Remove mutex from task mutex owner list. */
+  p_mlnk = os_tsk.run->p_mlnk;
+  if (p_mlnk == p_MCB) {
+    os_tsk.run->p_mlnk = p_MCB->p_mlnk;
+  }
+  else {
+    while (p_mlnk) {
+      if (p_mlnk->p_mlnk == p_MCB) {
+        p_mlnk->p_mlnk = p_MCB->p_mlnk;
+        break;
+      }
+      p_mlnk = p_mlnk->p_mlnk;
+    }
+  }
+
+  /* Restore owner task's priority. */
+  prio = os_tsk.run->prio_base;
+  p_mlnk = os_tsk.run->p_mlnk;
+  while (p_mlnk) {
+    if (p_mlnk->p_lnk && (p_mlnk->p_lnk->prio > prio)) {
+      /* A task with higher priority is waiting for mutex. */
+      prio = p_mlnk->p_lnk->prio;
+    }
+    p_mlnk = p_mlnk->p_mlnk;
+  }
+  os_tsk.run->prio = prio;
+
+  if (p_MCB->p_lnk != NULL) {
+    /* A task is waiting for mutex. */
+    p_TCB = rt_get_first ((P_XCB)p_MCB);
+#ifdef __CMSIS_RTOS
+    rt_ret_val(p_TCB, 0/*osOK*/);
+#else
+    rt_ret_val(p_TCB, OS_R_MUT);
+#endif
+    rt_rmv_dly (p_TCB);
+    /* A waiting task becomes the owner of this mutex. */
+    p_MCB->level     = 1;
+    p_MCB->owner     = p_TCB;
+    p_MCB->p_mlnk = p_TCB->p_mlnk;
+    p_TCB->p_mlnk = p_MCB; 
+    /* Priority inversion, check which task continues. */
+    if (os_tsk.run->prio >= rt_rdy_prio()) {
+      rt_dispatch (p_TCB);
+    }
+    else {
+      /* Ready task has higher priority than running task. */
+      rt_put_prio (&os_rdy, os_tsk.run);
+      rt_put_prio (&os_rdy, p_TCB);
+      os_tsk.run->state = READY;
+      p_TCB->state      = READY;
+      rt_dispatch (NULL);
+    }
+  }
+  else {
+    /* Check if own priority lowered by priority inversion. */
+    if (rt_rdy_prio() > os_tsk.run->prio) {
+      rt_put_prio (&os_rdy, os_tsk.run);
+      os_tsk.run->state = READY;
+      rt_dispatch (NULL);
+    }
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_mut_wait -----------------------------------*/
+
+OS_RESULT rt_mut_wait (OS_ID mutex, U16 timeout) {
+  /* Wait for a mutex, continue when mutex is free. */
+  P_MUCB p_MCB = mutex;
+
+  if (p_MCB->level == 0) {
+    p_MCB->owner = os_tsk.run;
+    p_MCB->p_mlnk = os_tsk.run->p_mlnk;
+    os_tsk.run->p_mlnk = p_MCB; 
+    goto inc;
+  }
+  if (p_MCB->owner == os_tsk.run) {
+    /* OK, running task is the owner of this mutex. */
+inc:p_MCB->level++;
+    __DMB();
+    return (OS_R_OK);
+  }
+  /* Mutex owned by another task, wait until released. */
+  if (timeout == 0) {
+    return (OS_R_TMO);
+  }
+  /* Raise the owner task priority if lower than current priority. */
+  /* This priority inversion is called priority inheritance.       */
+  if (p_MCB->owner->prio < os_tsk.run->prio) {
+    p_MCB->owner->prio = os_tsk.run->prio;
+    rt_resort_prio (p_MCB->owner);
+  }
+  if (p_MCB->p_lnk != NULL) {
+    rt_put_prio ((P_XCB)p_MCB, os_tsk.run);
+  }
+  else {
+    p_MCB->p_lnk = os_tsk.run;
+    os_tsk.run->p_lnk  = NULL;
+    os_tsk.run->p_rlnk = (P_TCB)p_MCB;
+  }
+  rt_block(timeout, WAIT_MUT);
+  return (OS_R_TMO);
+}
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Mutex.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Mutex.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,44 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MUTEX.H
+ *      Purpose: Implements mutex synchronization objects
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+extern void      rt_mut_init    (OS_ID mutex);
+extern OS_RESULT rt_mut_delete  (OS_ID mutex);
+extern OS_RESULT rt_mut_release (OS_ID mutex);
+extern OS_RESULT rt_mut_wait    (OS_ID mutex, U16 timeout);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Robin.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Robin.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,88 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_ROBIN.C
+ *      Purpose: Round Robin Task switching
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#include "rt_Time.h"
+#include "rt_Robin.h"
+#ifdef __CORTEX_A9
+#include "rt_HAL_CA.h"
+#else
+#include "rt_HAL_CM.h"
+#endif
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+struct OS_ROBIN os_robin;
+
+
+/*----------------------------------------------------------------------------
+ *      Global Functions
+ *---------------------------------------------------------------------------*/
+
+/*--------------------------- rt_init_robin ---------------------------------*/
+
+__weak void rt_init_robin (void) {
+  /* Initialize Round Robin variables. */
+  os_robin.task = NULL;
+  os_robin.tout = (U16)os_rrobin;
+}
+
+/*--------------------------- rt_chk_robin ----------------------------------*/
+
+__weak void rt_chk_robin (void) {
+  /* Check if Round Robin timeout expired and switch to the next ready task.*/
+  P_TCB p_new;
+
+  if (os_robin.task != os_rdy.p_lnk) {
+    /* New task was suspended, reset Round Robin timeout. */
+    os_robin.task = os_rdy.p_lnk;
+    os_robin.time = (U16)os_time + os_robin.tout - 1;
+  }
+  if (os_robin.time == (U16)os_time) {
+    /* Round Robin timeout has expired, swap Robin tasks. */
+    os_robin.task = NULL;
+    p_new = rt_get_first (&os_rdy);
+    rt_put_prio ((P_XCB)&os_rdy, p_new);
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Robin.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Robin.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,45 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_ROBIN.H
+ *      Purpose: Round Robin Task switching definitions
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Variables */
+extern struct OS_ROBIN os_robin;
+
+/* Functions */
+extern void rt_init_robin (void);
+extern void rt_chk_robin  (void);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Semaphore.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Semaphore.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,191 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_SEMAPHORE.C
+ *      Purpose: Implements binary and counting semaphores
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#include "rt_Semaphore.h"
+#ifdef __CORTEX_A9
+#include "rt_HAL_CA.h"
+#else
+#include "rt_HAL_CM.h"
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_sem_init -----------------------------------*/
+
+void rt_sem_init (OS_ID semaphore, U16 token_count) {
+  /* Initialize a semaphore */
+  P_SCB p_SCB = semaphore;
+
+  p_SCB->cb_type = SCB;
+  p_SCB->p_lnk  = NULL;
+  p_SCB->tokens = token_count;
+}
+
+
+/*--------------------------- rt_sem_delete ---------------------------------*/
+
+#ifdef __CMSIS_RTOS
+OS_RESULT rt_sem_delete (OS_ID semaphore) {
+  /* Delete semaphore */
+  P_SCB p_SCB = semaphore;
+  P_TCB p_TCB;
+
+  __DMB();
+  while (p_SCB->p_lnk != NULL) {
+    /* A task is waiting for token */
+    p_TCB = rt_get_first ((P_XCB)p_SCB);
+    rt_ret_val(p_TCB, 0);
+    rt_rmv_dly(p_TCB);
+    p_TCB->state = READY;
+    rt_put_prio (&os_rdy, p_TCB);
+  }
+
+  if (os_rdy.p_lnk && (os_rdy.p_lnk->prio > os_tsk.run->prio)) {
+    /* preempt running task */
+    rt_put_prio (&os_rdy, os_tsk.run);
+    os_tsk.run->state = READY;
+    rt_dispatch (NULL);
+  }
+
+  p_SCB->cb_type = 0;
+
+  return (OS_R_OK);
+}
+#endif
+
+
+/*--------------------------- rt_sem_send -----------------------------------*/
+
+OS_RESULT rt_sem_send (OS_ID semaphore) {
+  /* Return a token to semaphore */
+  P_SCB p_SCB = semaphore;
+  P_TCB p_TCB;
+
+  __DMB();
+  if (p_SCB->p_lnk != NULL) {
+    /* A task is waiting for token */
+    p_TCB = rt_get_first ((P_XCB)p_SCB);
+#ifdef __CMSIS_RTOS
+    rt_ret_val(p_TCB, 1);
+#else
+    rt_ret_val(p_TCB, OS_R_SEM);
+#endif
+    rt_rmv_dly (p_TCB);
+    rt_dispatch (p_TCB);
+  }
+  else {
+    /* Store token. */
+    p_SCB->tokens++;
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_sem_wait -----------------------------------*/
+
+OS_RESULT rt_sem_wait (OS_ID semaphore, U16 timeout) {
+  /* Obtain a token; possibly wait for it */
+  P_SCB p_SCB = semaphore;
+
+  if (p_SCB->tokens) {
+    p_SCB->tokens--;
+    __DMB();
+    return (OS_R_OK);
+  }
+  /* No token available: wait for one */
+  if (timeout == 0) {
+    return (OS_R_TMO);
+  }
+  if (p_SCB->p_lnk != NULL) {
+    rt_put_prio ((P_XCB)p_SCB, os_tsk.run);
+  }
+  else {
+    p_SCB->p_lnk = os_tsk.run;
+    os_tsk.run->p_lnk = NULL;
+    os_tsk.run->p_rlnk = (P_TCB)p_SCB;
+  }
+  rt_block(timeout, WAIT_SEM);
+  return (OS_R_TMO);
+}
+
+
+/*--------------------------- isr_sem_send ----------------------------------*/
+
+void isr_sem_send (OS_ID semaphore) {
+  /* Same function as "os_sem_send", but to be called by ISRs */
+  P_SCB p_SCB = semaphore;
+
+  rt_psq_enq (p_SCB, 0);
+  rt_psh_req ();
+}
+
+
+/*--------------------------- rt_sem_psh ------------------------------------*/
+
+void rt_sem_psh (P_SCB p_CB) {
+  /* Check if task has to be waken up */
+  P_TCB p_TCB;
+
+  __DMB();
+  if (p_CB->p_lnk != NULL) {
+    /* A task is waiting for token */
+    p_TCB = rt_get_first ((P_XCB)p_CB);
+    rt_rmv_dly (p_TCB);
+    p_TCB->state   = READY;
+#ifdef __CMSIS_RTOS
+    rt_ret_val(p_TCB, 1);
+#else
+    rt_ret_val(p_TCB, OS_R_SEM);
+#endif
+    rt_put_prio (&os_rdy, p_TCB);
+  }
+  else {
+    /* Store token */
+    p_CB->tokens++;
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Semaphore.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Semaphore.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,46 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_SEMAPHORE.H
+ *      Purpose: Implements binary and counting semaphores
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+extern void      rt_sem_init  (OS_ID semaphore, U16 token_count);
+extern OS_RESULT rt_sem_delete(OS_ID semaphore);
+extern OS_RESULT rt_sem_send  (OS_ID semaphore);
+extern OS_RESULT rt_sem_wait  (OS_ID semaphore, U16 timeout);
+extern void      isr_sem_send (OS_ID semaphore);
+extern void      rt_sem_psh (P_SCB p_CB);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_System.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_System.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,337 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_SYSTEM.C
+ *      Purpose: System Task Manager
+ *      Rev.:    8 April 2015
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_Task.h"
+#include "rt_System.h"
+#include "rt_Event.h"
+#include "rt_List.h"
+#include "rt_Mailbox.h"
+#include "rt_Semaphore.h"
+#include "rt_Time.h"
+#include "rt_Timer.h"
+#include "rt_Robin.h"
+#ifdef __CORTEX_A9
+#include "rt_HAL_CA.h"
+#else
+#include "rt_HAL_CM.h"
+#endif
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+int os_tick_irqn;
+U8  scheduler_suspended = 0;    // flag set by rt_suspend, cleared by rt_resume, read by SVC_Handler
+
+/*----------------------------------------------------------------------------
+ *      Local Variables
+ *---------------------------------------------------------------------------*/
+
+static volatile BIT os_lock;
+static volatile BIT os_psh_flag;
+#ifndef __CORTEX_A9
+static          U8  pend_flags;
+#endif
+/*----------------------------------------------------------------------------
+ *      Global Functions
+ *---------------------------------------------------------------------------*/
+
+#define RL_RTX_VER      0x473
+
+#if defined (__CC_ARM)
+__asm void $$RTX$$version (void) {
+   /* Export a version number symbol for a version control. */
+
+                EXPORT  __RL_RTX_VER
+
+__RL_RTX_VER    EQU     RL_RTX_VER
+}
+#endif
+
+
+/*--------------------------- rt_suspend ------------------------------------*/
+
+extern U32 sysUserTimerWakeupTime(void);
+
+U32 rt_suspend (void) {
+  /* Suspend OS scheduler */
+  U32 delta = 0xFFFF;
+#ifdef __CMSIS_RTOS
+  U32 sleep;
+#endif
+
+  rt_tsk_lock();
+  scheduler_suspended = 1;
+
+  if (os_dly.p_dlnk) {
+    delta = os_dly.delta_time;
+  }
+#ifdef __CMSIS_RTOS
+  sleep = sysUserTimerWakeupTime();
+  if (sleep < delta) delta = sleep;
+#else
+  if (os_tmr.next) {
+    if (os_tmr.tcnt < delta) delta = os_tmr.tcnt;
+  }
+#endif
+
+  return (delta);
+}
+
+
+/*--------------------------- rt_resume -------------------------------------*/
+
+extern void sysUserTimerUpdate (U32 sleep_time);
+
+void rt_resume (U32 sleep_time) {
+  /* Resume OS scheduler after suspend */
+  P_TCB next;
+  U32   delta;
+
+  os_tsk.run->state = READY;
+  rt_put_rdy_first (os_tsk.run);
+
+  os_robin.task = NULL;
+
+  /* Update delays. */
+  if (os_dly.p_dlnk) {
+    delta = sleep_time;
+    if (delta >= os_dly.delta_time) {
+      delta   -= os_dly.delta_time;
+      os_time += os_dly.delta_time;
+      os_dly.delta_time = 1;
+      while (os_dly.p_dlnk) {
+        rt_dec_dly();
+        if (delta == 0) break;
+        delta--;
+        os_time++;
+      }
+    } else {
+      os_time           += delta;
+      os_dly.delta_time -= delta;
+    }
+  } else {
+    os_time += sleep_time;
+  }
+
+  /* Check the user timers. */
+#ifdef __CMSIS_RTOS
+  sysUserTimerUpdate(sleep_time);
+#else
+  if (os_tmr.next) {
+    delta = sleep_time;
+    if (delta >= os_tmr.tcnt) {
+      delta   -= os_tmr.tcnt;
+      os_tmr.tcnt = 1;
+      while (os_tmr.next) {
+        rt_tmr_tick();
+        if (delta == 0) break;
+        delta--;
+      }
+    } else {
+      os_tmr.tcnt -= delta;
+    }
+  }
+#endif
+
+  /* Switch back to highest ready task */
+  next = rt_get_first (&os_rdy);
+  rt_switch_req (next);
+
+  scheduler_suspended = 0;
+  rt_tsk_unlock();
+}
+
+
+/*--------------------------- rt_tsk_lock -----------------------------------*/
+
+void rt_tsk_lock (void) {
+  /* Prevent task switching by locking out scheduler */
+  if (os_lock == __TRUE) // don't lock again if already locked
+    return;
+
+  if (os_tick_irqn < 0) {
+    OS_LOCK();
+    os_lock = __TRUE;
+    OS_UNPEND (&pend_flags);
+  } else {
+    OS_X_LOCK(os_tick_irqn);
+    os_lock = __TRUE;
+    OS_X_UNPEND (&pend_flags);
+  }
+}
+
+
+/*--------------------------- rt_tsk_unlock ---------------------------------*/
+
+void rt_tsk_unlock (void) {
+  /* Unlock scheduler and re-enable task switching */
+  if (os_tick_irqn < 0) {
+    OS_UNLOCK();
+    os_lock = __FALSE;
+    OS_PEND (pend_flags, os_psh_flag);
+    os_psh_flag = __FALSE;
+  } else {
+    OS_X_UNLOCK(os_tick_irqn);
+    os_lock = __FALSE;
+    OS_X_PEND (pend_flags, os_psh_flag);
+    os_psh_flag = __FALSE;
+  }
+}
+
+
+/*--------------------------- rt_psh_req ------------------------------------*/
+
+void rt_psh_req (void) {
+  /* Initiate a post service handling request if required. */
+  if (os_lock == __FALSE) {
+    OS_PEND_IRQ ();
+  }
+  else {
+    os_psh_flag = __TRUE;
+  }
+}
+
+
+/*--------------------------- rt_pop_req ------------------------------------*/
+
+void rt_pop_req (void) {
+  /* Process an ISR post service requests. */
+  struct OS_XCB *p_CB;
+  P_TCB next;
+  U32  idx;
+
+  os_tsk.run->state = READY;
+  rt_put_rdy_first (os_tsk.run);
+
+  idx = os_psq->last;
+  while (os_psq->count) {
+    p_CB = os_psq->q[idx].id;
+    if (p_CB->cb_type == TCB) {
+      /* Is of TCB type */
+      rt_evt_psh ((P_TCB)p_CB, (U16)os_psq->q[idx].arg);
+    }
+    else if (p_CB->cb_type == MCB) {
+      /* Is of MCB type */
+      rt_mbx_psh ((P_MCB)p_CB, (void *)os_psq->q[idx].arg);
+    }
+    else {
+      /* Must be of SCB type */
+      rt_sem_psh ((P_SCB)p_CB);
+    }
+    if (++idx == os_psq->size) idx = 0;
+    rt_dec (&os_psq->count);
+  }
+  os_psq->last = idx;
+
+  next = rt_get_first (&os_rdy);
+  rt_switch_req (next);
+}
+
+
+/*--------------------------- os_tick_init ----------------------------------*/
+
+__weak int os_tick_init (void) {
+  /* Initialize SysTick timer as system tick timer. */
+  rt_systick_init ();
+  return (-1);  /* Return IRQ number of SysTick timer */
+}
+
+/*--------------------------- os_tick_val -----------------------------------*/
+
+__weak U32 os_tick_val (void) {
+  /* Get SysTick timer current value (0 .. OS_TRV). */
+  return rt_systick_val();
+}
+
+/*--------------------------- os_tick_ovf -----------------------------------*/
+
+__weak U32 os_tick_ovf (void) {
+  /* Get SysTick timer overflow flag */
+  return rt_systick_ovf();
+}
+
+/*--------------------------- os_tick_irqack --------------------------------*/
+
+__weak void os_tick_irqack (void) {
+  /* Acknowledge timer interrupt. */
+}
+
+
+/*--------------------------- rt_systick ------------------------------------*/
+
+extern void sysTimerTick(void);
+
+void rt_systick (void) {
+  /* Check for system clock update, suspend running task. */
+  P_TCB next;
+
+  os_tsk.run->state = READY;
+  rt_put_rdy_first (os_tsk.run);
+
+  /* Check Round Robin timeout. */
+  rt_chk_robin ();
+
+  /* Update delays. */
+  os_time++;
+  rt_dec_dly ();
+
+  /* Check the user timers. */
+#ifdef __CMSIS_RTOS
+  sysTimerTick();
+#else
+  rt_tmr_tick ();
+#endif
+
+  /* Switch back to highest ready task */
+  next = rt_get_first (&os_rdy);
+  rt_switch_req (next);
+}
+
+/*--------------------------- rt_stk_check ----------------------------------*/
+
+__weak void rt_stk_check (void) {
+  /* Check for stack overflow. */
+  if ((os_tsk.run->tsk_stack < (U32)os_tsk.run->stack) ||
+      (os_tsk.run->stack[0] != MAGIC_WORD)) {
+    os_error (OS_ERR_STK_OVF);
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_System.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_System.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,52 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_SYSTEM.H
+ *      Purpose: System Task Manager definitions
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Variables */
+#define os_psq  ((P_PSQ)&os_fifo)
+extern int os_tick_irqn;
+
+/* Functions */
+extern U32  rt_suspend    (void);
+extern void rt_resume     (U32 sleep_time);
+extern void rt_tsk_lock   (void);
+extern void rt_tsk_unlock (void);
+extern void rt_psh_req    (void);
+extern void rt_pop_req    (void);
+extern void rt_systick    (void);
+extern void rt_stk_check  (void);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Task.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Task.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,436 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TASK.C
+ *      Purpose: Task functions and system start up.
+ *      Rev.:    V4.73
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_Task.h"
+#include "rt_List.h"
+#include "rt_MemBox.h"
+#include "rt_Robin.h"
+#ifdef __CORTEX_A9
+#include "rt_HAL_CA.h"
+#else
+#include "rt_HAL_CM.h"
+#endif
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+/* Running and next task info. */
+struct OS_TSK os_tsk;
+
+/* Task Control Blocks of idle demon */
+struct OS_TCB os_idle_TCB;
+
+
+/*----------------------------------------------------------------------------
+ *      Local Functions
+ *---------------------------------------------------------------------------*/
+
+static OS_TID rt_get_TID (void) {
+  U32 tid;
+
+  for (tid = 1; tid <= os_maxtaskrun; tid++) {
+    if (os_active_TCB[tid-1] == NULL) {
+      return ((OS_TID)tid);
+    }
+  }
+  return (0);
+}
+
+
+/*--------------------------- rt_init_context -------------------------------*/
+
+static void rt_init_context (P_TCB p_TCB, U8 priority, FUNCP task_body) {
+  /* Initialize general part of the Task Control Block. */
+  p_TCB->cb_type = TCB;
+  p_TCB->state   = READY;
+  p_TCB->prio    = priority;
+  p_TCB->prio_base = priority;
+  p_TCB->p_lnk   = NULL;
+  p_TCB->p_rlnk  = NULL;
+  p_TCB->p_dlnk  = NULL;
+  p_TCB->p_blnk  = NULL;
+  p_TCB->p_mlnk    = NULL;
+  p_TCB->delta_time    = 0;
+  p_TCB->interval_time = 0;
+  p_TCB->events  = 0;
+  p_TCB->waits   = 0;
+  p_TCB->stack_frame = 0;
+
+  if (p_TCB->priv_stack == 0) {
+    /* Allocate the memory space for the stack. */
+    p_TCB->stack = rt_alloc_box (mp_stk);
+  }
+  rt_init_stack (p_TCB, task_body);
+}
+
+
+/*--------------------------- rt_switch_req ---------------------------------*/
+
+void rt_switch_req (P_TCB p_new) {
+  /* Switch to next task (identified by "p_new"). */
+  os_tsk.new_tsk   = p_new;
+  p_new->state = RUNNING;
+  DBG_TASK_SWITCH(p_new->task_id);
+}
+
+
+/*--------------------------- rt_dispatch -----------------------------------*/
+
+void rt_dispatch (P_TCB next_TCB) {
+  /* Dispatch next task if any identified or dispatch highest ready task    */
+  /* "next_TCB" identifies a task to run or has value NULL (=no next task)  */
+  if (next_TCB == NULL) {
+    /* Running task was blocked: continue with highest ready task */
+    next_TCB = rt_get_first (&os_rdy);
+    rt_switch_req (next_TCB);
+  }
+  else {
+    /* Check which task continues */
+    if (next_TCB->prio > os_tsk.run->prio) {
+      /* preempt running task */
+      rt_put_rdy_first (os_tsk.run);
+      os_tsk.run->state = READY;
+      rt_switch_req (next_TCB);
+    }
+    else {
+      /* put next task into ready list, no task switch takes place */
+      next_TCB->state = READY;
+      rt_put_prio (&os_rdy, next_TCB);
+    }
+  }
+}
+
+
+/*--------------------------- rt_block --------------------------------------*/
+
+void rt_block (U16 timeout, U8 block_state) {
+  /* Block running task and choose next ready task.                         */
+  /* "timeout" sets a time-out value or is 0xffff (=no time-out).           */
+  /* "block_state" defines the appropriate task state */
+  P_TCB next_TCB;
+
+  if (timeout) {
+    if (timeout < 0xffff) {
+      rt_put_dly (os_tsk.run, timeout);
+    }
+    os_tsk.run->state = block_state;
+    next_TCB = rt_get_first (&os_rdy);
+    rt_switch_req (next_TCB);
+  }
+}
+
+
+/*--------------------------- rt_tsk_pass -----------------------------------*/
+
+void rt_tsk_pass (void) {
+  /* Allow tasks of same priority level to run cooperatively.*/
+  P_TCB p_new;
+
+  p_new = rt_get_same_rdy_prio();
+  if (p_new != NULL) {
+    rt_put_prio ((P_XCB)&os_rdy, os_tsk.run);
+    os_tsk.run->state = READY;
+    rt_switch_req (p_new);
+  }
+}
+
+
+/*--------------------------- rt_tsk_self -----------------------------------*/
+
+OS_TID rt_tsk_self (void) {
+  /* Return own task identifier value. */
+  if (os_tsk.run == NULL) {
+    return (0);
+  }
+  return (os_tsk.run->task_id);
+}
+
+
+/*--------------------------- rt_tsk_prio -----------------------------------*/
+
+OS_RESULT rt_tsk_prio (OS_TID task_id, U8 new_prio) {
+  /* Change execution priority of a task to "new_prio". */
+  P_TCB p_task;
+
+  if (task_id == 0) {
+    /* Change execution priority of calling task. */
+    os_tsk.run->prio = new_prio;
+    os_tsk.run->prio_base = new_prio;
+run:if (rt_rdy_prio() > new_prio) {
+      rt_put_prio (&os_rdy, os_tsk.run);
+      os_tsk.run->state   = READY;
+      rt_dispatch (NULL);
+    }
+    return (OS_R_OK);
+  }
+
+  /* Find the task in the "os_active_TCB" array. */
+  if (task_id > os_maxtaskrun || os_active_TCB[task_id-1] == NULL) {
+    /* Task with "task_id" not found or not started. */
+    return (OS_R_NOK);
+  }
+  p_task = os_active_TCB[task_id-1];
+  p_task->prio = new_prio;
+  p_task->prio_base = new_prio;
+  if (p_task == os_tsk.run) {
+    goto run;
+  }
+  rt_resort_prio (p_task);
+  if (p_task->state == READY) {
+    /* Task enqueued in a ready list. */
+    p_task = rt_get_first (&os_rdy);
+    rt_dispatch (p_task);
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_tsk_create ---------------------------------*/
+
+OS_TID rt_tsk_create (FUNCP task, U32 prio_stksz, void *stk, void *argv) {
+  /* Start a new task declared with "task". */
+  P_TCB task_context;
+  U32 i;
+
+  /* Priority 0 is reserved for idle task! */
+  if ((prio_stksz & 0xFF) == 0) {
+    prio_stksz += 1;
+  }
+  task_context = rt_alloc_box (mp_tcb);
+  if (task_context == NULL) {
+    return (0);
+  }
+  /* If "size != 0" use a private user provided stack. */
+  task_context->stack      = stk;
+  task_context->priv_stack = prio_stksz >> 8;
+  /* Pass parameter 'argv' to 'rt_init_context' */
+  task_context->msg = argv;
+  /* For 'size == 0' system allocates the user stack from the memory pool. */
+  rt_init_context (task_context, prio_stksz & 0xFF, task);
+
+  /* Find a free entry in 'os_active_TCB' table. */
+  i = rt_get_TID ();
+  os_active_TCB[i-1] = task_context;
+  task_context->task_id = i;
+  DBG_TASK_NOTIFY(task_context, __TRUE);
+  rt_dispatch (task_context);
+  return ((OS_TID)i);
+}
+
+
+/*--------------------------- rt_tsk_delete ---------------------------------*/
+
+OS_RESULT rt_tsk_delete (OS_TID task_id) {
+  /* Terminate the task identified with "task_id". */
+  P_TCB task_context;
+  P_TCB  p_TCB;
+  P_MUCB p_MCB, p_MCB0;
+
+  if (task_id == 0 || task_id == os_tsk.run->task_id) {
+    /* Terminate itself. */
+    os_tsk.run->state     = INACTIVE;
+    os_tsk.run->tsk_stack = rt_get_PSP ();
+    rt_stk_check ();
+    p_MCB = os_tsk.run->p_mlnk;
+    while (p_MCB) {
+      /* Release mutexes owned by this task */
+      if (p_MCB->p_lnk) {
+        /* A task is waiting for mutex. */
+        p_TCB = rt_get_first ((P_XCB)p_MCB);
+#ifdef __CMSIS_RTOS
+        rt_ret_val(p_TCB, 0/*osOK*/);
+#else
+        rt_ret_val(p_TCB, OS_R_MUT); 
+#endif
+        rt_rmv_dly (p_TCB);
+        p_TCB->state = READY;
+        rt_put_prio (&os_rdy, p_TCB);
+        /* A waiting task becomes the owner of this mutex. */
+        p_MCB0 = p_MCB;
+        p_MCB->level  = 1;
+        p_MCB->owner  = p_TCB;
+        p_MCB->p_mlnk = p_TCB->p_mlnk;
+        p_TCB->p_mlnk = p_MCB; 
+        p_MCB = p_MCB0->p_mlnk;
+      }
+      else {
+        p_MCB = p_MCB->p_mlnk;
+      }
+    }
+    os_active_TCB[os_tsk.run->task_id-1] = NULL;
+    rt_free_box (mp_stk, os_tsk.run->stack);
+    os_tsk.run->stack = NULL;
+    DBG_TASK_NOTIFY(os_tsk.run, __FALSE);
+    rt_free_box (mp_tcb, os_tsk.run);
+    os_tsk.run = NULL;
+    rt_dispatch (NULL);
+    /* The program should never come to this point. */
+  }
+  else {
+    /* Find the task in the "os_active_TCB" array. */
+    if (task_id > os_maxtaskrun || os_active_TCB[task_id-1] == NULL) {
+      /* Task with "task_id" not found or not started. */
+      return (OS_R_NOK);
+    }
+    task_context = os_active_TCB[task_id-1];
+    rt_rmv_list (task_context);
+    rt_rmv_dly (task_context);
+    p_MCB = task_context->p_mlnk;
+    while (p_MCB) {
+      /* Release mutexes owned by this task */
+      if (p_MCB->p_lnk) {
+        /* A task is waiting for mutex. */
+        p_TCB = rt_get_first ((P_XCB)p_MCB);
+#ifdef __CMSIS_RTOS
+        rt_ret_val(p_TCB, 0/*osOK*/);
+#else
+        rt_ret_val(p_TCB, OS_R_MUT); 
+#endif
+        rt_rmv_dly (p_TCB);
+        p_TCB->state = READY;
+        rt_put_prio (&os_rdy, p_TCB);
+        /* A waiting task becomes the owner of this mutex. */
+        p_MCB0 = p_MCB;
+        p_MCB->level  = 1;
+        p_MCB->owner  = p_TCB;
+        p_MCB->p_mlnk = p_TCB->p_mlnk;
+        p_TCB->p_mlnk = p_MCB; 
+        p_MCB = p_MCB0->p_mlnk;
+      }
+      else {
+        p_MCB = p_MCB->p_mlnk;
+      }
+    }
+    os_active_TCB[task_id-1] = NULL;
+    rt_free_box (mp_stk, task_context->stack);
+    task_context->stack = NULL;
+    DBG_TASK_NOTIFY(task_context, __FALSE);
+    rt_free_box (mp_tcb, task_context);
+    if (rt_rdy_prio() > os_tsk.run->prio) {
+      /* Ready task has higher priority than running task. */
+      os_tsk.run->state = READY;
+      rt_put_prio (&os_rdy, os_tsk.run);
+      rt_dispatch (NULL);
+    }
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_sys_init -----------------------------------*/
+
+#ifdef __CMSIS_RTOS
+void rt_sys_init (void) {
+#else
+void rt_sys_init (FUNCP first_task, U32 prio_stksz, void *stk) {
+#endif
+  /* Initialize system and start up task declared with "first_task". */
+  U32 i;
+
+  DBG_INIT();
+
+  /* Initialize dynamic memory and task TCB pointers to NULL. */
+  for (i = 0; i < os_maxtaskrun; i++) {
+    os_active_TCB[i] = NULL;
+  }
+  rt_init_box (&mp_tcb, mp_tcb_size, sizeof(struct OS_TCB));
+  rt_init_box (&mp_stk, mp_stk_size, BOX_ALIGN_8 | (U16)(os_stackinfo));
+  rt_init_box ((U32 *)m_tmr, mp_tmr_size, sizeof(struct OS_TMR));
+
+  /* Set up TCB of idle demon */
+  os_idle_TCB.task_id    = 255;
+  os_idle_TCB.priv_stack = 0;
+  rt_init_context (&os_idle_TCB, 0, os_idle_demon);
+
+  /* Set up ready list: initially empty */
+  os_rdy.cb_type = HCB;
+  os_rdy.p_lnk   = NULL;
+  /* Set up delay list: initially empty */
+  os_dly.cb_type = HCB;
+  os_dly.p_dlnk  = NULL;
+  os_dly.p_blnk  = NULL;
+  os_dly.delta_time = 0;
+
+  /* Fix SP and system variables to assume idle task is running  */
+  /* Transform main program into idle task by assuming idle TCB */
+#ifndef __CMSIS_RTOS
+  rt_set_PSP (os_idle_TCB.tsk_stack+32);
+#endif
+  os_tsk.run = &os_idle_TCB;
+  os_tsk.run->state = RUNNING;
+
+  /* Initialize ps queue */
+  os_psq->first = 0;
+  os_psq->last  = 0;
+  os_psq->size  = os_fifo_size;
+
+  rt_init_robin ();
+
+  /* Initialize SVC and PendSV */
+  rt_svc_init ();
+
+#ifndef __CMSIS_RTOS
+  /* Initialize and start system clock timer */
+  os_tick_irqn = os_tick_init ();
+  if (os_tick_irqn >= 0) {
+    OS_X_INIT(os_tick_irqn);
+  }
+
+  /* Start up first user task before entering the endless loop */
+  rt_tsk_create (first_task, prio_stksz, stk, NULL);
+#endif
+}
+
+
+/*--------------------------- rt_sys_start ----------------------------------*/
+
+#ifdef __CMSIS_RTOS
+void rt_sys_start (void) {
+  /* Start system */
+
+  /* Initialize and start system clock timer */
+  os_tick_irqn = os_tick_init ();
+  if (os_tick_irqn >= 0) {
+    OS_X_INIT(os_tick_irqn);
+  }
+}
+#endif
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Task.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Task.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,87 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TASK.H
+ *      Purpose: Task functions and system start up.
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Definitions */
+
+/* Values for 'state'   */
+#define INACTIVE        0
+#define READY           1
+#define RUNNING         2
+#define WAIT_DLY        3
+#define WAIT_ITV        4
+#define WAIT_OR         5
+#define WAIT_AND        6
+#define WAIT_SEM        7
+#define WAIT_MBX        8
+#define WAIT_MUT        9
+
+/* Return codes */
+#define OS_R_TMO        0x01
+#define OS_R_EVT        0x02
+#define OS_R_SEM        0x03
+#define OS_R_MBX        0x04
+#define OS_R_MUT        0x05
+
+#define OS_R_OK         0x00
+#define OS_R_NOK        0xff
+
+/* Variables */
+extern struct OS_TSK os_tsk;
+extern struct OS_TCB os_idle_TCB;
+
+/* Functions */
+extern void      rt_switch_req (P_TCB p_new);
+extern void      rt_dispatch   (P_TCB next_TCB);
+extern void      rt_block      (U16 timeout, U8 block_state);
+extern void      rt_tsk_pass   (void);
+extern OS_TID    rt_tsk_self   (void);
+extern OS_RESULT rt_tsk_prio   (OS_TID task_id, U8 new_prio);
+extern OS_TID    rt_tsk_create (FUNCP task, U32 prio_stksz, void *stk, void *argv);
+extern OS_RESULT rt_tsk_delete (OS_TID task_id);
+#ifdef __CMSIS_RTOS
+extern void      rt_sys_init   (void);
+extern void      rt_sys_start  (void);
+#else
+extern void      rt_sys_init   (FUNCP first_task, U32 prio_stksz, void *stk);
+#endif
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+
+
+
+
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Time.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Time.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,94 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TIME.C
+ *      Purpose: Delay and interval wait functions
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_Task.h"
+#include "rt_Time.h"
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+/* Free running system tick counter */
+U32 os_time;
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_time_get -----------------------------------*/
+
+U32 rt_time_get (void) {
+  /* Get system time tick */
+  return (os_time);
+}
+
+
+/*--------------------------- rt_dly_wait -----------------------------------*/
+
+void rt_dly_wait (U16 delay_time) {
+  /* Delay task by "delay_time" */
+  rt_block (delay_time, WAIT_DLY);
+}
+
+
+/*--------------------------- rt_itv_set ------------------------------------*/
+
+void rt_itv_set (U16 interval_time) {
+  /* Set interval length and define start of first interval */
+  os_tsk.run->interval_time = interval_time;
+  os_tsk.run->delta_time = interval_time + (U16)os_time;
+}
+
+
+/*--------------------------- rt_itv_wait -----------------------------------*/
+
+void rt_itv_wait (void) {
+  /* Wait for interval end and define start of next one */
+  U16 delta;
+
+  delta = os_tsk.run->delta_time - (U16)os_time;
+  os_tsk.run->delta_time += os_tsk.run->interval_time;
+  if ((delta & 0x8000) == 0) {
+    rt_block (delta, WAIT_ITV);
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Time.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Time.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,47 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TIME.H
+ *      Purpose: Delay and interval wait functions definitions
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Variables */
+extern U32 os_time;
+
+/* Functions */
+extern U32  rt_time_get (void);
+extern void rt_dly_wait (U16 delay_time);
+extern void rt_itv_set  (U16 interval_time);
+extern void rt_itv_wait (void);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_Timer.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_Timer.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,46 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TIMER.H
+ *      Purpose: User timer functions
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Variables */
+extern struct OS_XTMR os_tmr;
+
+/* Functions */
+extern void  rt_tmr_tick   (void);
+extern OS_ID rt_tmr_create (U16 tcnt, U16 info);
+extern OS_ID rt_tmr_kill   (OS_ID timer);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_A/rt_TypeDef.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_A/rt_TypeDef.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,187 @@
+/*----------------------------------------------------------------------------
+ *      RL-ARM - RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TYPEDEF.H
+ *      Purpose: Type Definitions
+ *      Rev.:    V4.73 (plus large stack)
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Types */
+typedef char               S8;
+typedef unsigned char      U8;
+typedef short              S16;
+typedef unsigned short     U16;
+typedef int                S32;
+typedef unsigned int       U32;
+typedef long long          S64;
+typedef unsigned long long U64;
+typedef unsigned char      BIT;
+typedef unsigned int       BOOL;
+typedef void               (*FUNCP)(void);
+
+typedef U32     OS_TID;
+typedef void    *OS_ID;
+typedef U32     OS_RESULT;
+
+typedef struct OS_TCB {
+  /* General part: identical for all implementations.                        */
+  U8     cb_type;                 /* Control Block Type                      */
+  U8     state;                   /* Task state                              */
+  U8     prio;                    /* Execution priority                      */
+  U8     task_id;                 /* Task ID value for optimized TCB access  */
+  struct OS_TCB *p_lnk;           /* Link pointer for ready/sem. wait list   */
+  struct OS_TCB *p_rlnk;          /* Link pointer for sem./mbx lst backwards */
+  struct OS_TCB *p_dlnk;          /* Link pointer for delay list             */
+  struct OS_TCB *p_blnk;          /* Link pointer for delay list backwards   */
+  U16    delta_time;              /* Time until time out                     */
+  U16    interval_time;           /* Time interval for periodic waits        */
+  U16    events;                  /* Event flags                             */
+  U16    waits;                   /* Wait flags                              */
+  void   **msg;                   /* Direct message passing when task waits  */
+  struct OS_MUCB *p_mlnk;         /* Link pointer for mutex owner list       */
+  U8     prio_base;               /* Base priority                           */
+
+  /* Hardware dependant part: specific for Cortex processor                  */
+  U8     stack_frame;             /* Stack frame: 0x0 Basic, 0x1 Extended, 0x2 VFP/D16 stacked, 0x4 NEON/D32 stacked */
+#if defined (__ICCARM__)
+#ifndef __LARGE_PRIV_STACK
+  U16    priv_stack;              /* Private stack size, 0= system assigned  */
+#else
+  U16    reserved;                /* Reserved (padding)                      */
+  U32    priv_stack;              /* Private stack size for LARGE_STACK, 0= system assigned  */
+#endif /* __LARGE_PRIV_STACK */
+#else
+  U16    reserved;                /* Reserved (padding)                      */
+  U32    priv_stack;              /* Private stack size for LARGE_STACK, 0= system assigned  */
+#endif
+  U32    tsk_stack;               /* Current task Stack pointer (R13)        */
+  U32    *stack;                  /* Pointer to Task Stack memory block      */
+
+  /* Task entry point used for uVision debugger                              */
+  FUNCP  ptask;                   /* Task entry address                      */
+  void   *argv;                   /* Task argument                           */
+} *P_TCB;
+#define TCB_TID          3        /* 'task id' offset                        */
+#define TCB_STACKF      37        /* 'stack_frame' offset                    */
+#if defined (__ICCARM__)
+#ifndef __LARGE_PRIV_STACK
+#define TCB_TSTACK      40        /* 'tsk_stack' offset                      */
+#else
+#define TCB_TSTACK      44        /* 'tsk_stack' offset for LARGE_STACK      */
+#endif /* __LARGE_PRIV_STACK */
+#else
+#define TCB_TSTACK      44        /* 'tsk_stack' offset for LARGE_STACK      */
+#endif
+
+typedef struct OS_PSFE {          /* Post Service Fifo Entry                 */
+  void  *id;                      /* Object Identification                   */
+  U32    arg;                     /* Object Argument                         */
+} *P_PSFE;
+
+typedef struct OS_PSQ {           /* Post Service Queue                      */
+  U8     first;                   /* FIFO Head Index                         */
+  U8     last;                    /* FIFO Tail Index                         */
+  U8     count;                   /* Number of stored items in FIFO          */
+  U8     size;                    /* FIFO Size                               */
+  struct OS_PSFE q[1];            /* FIFO Content                            */
+} *P_PSQ;
+
+typedef struct OS_TSK {
+  P_TCB  run;                     /* Current running task                    */
+  P_TCB  new_tsk;                 /* Scheduled task to run                   */
+} *P_TSK;
+
+typedef struct OS_ROBIN {         /* Round Robin Control                     */
+  P_TCB  task;                    /* Round Robin task                        */
+  U16    time;                    /* Round Robin switch time                 */
+  U16    tout;                    /* Round Robin timeout                     */
+} *P_ROBIN;
+
+typedef struct OS_XCB {
+  U8     cb_type;                 /* Control Block Type                      */
+  struct OS_TCB *p_lnk;           /* Link pointer for ready/sem. wait list   */
+  struct OS_TCB *p_rlnk;          /* Link pointer for sem./mbx lst backwards */
+  struct OS_TCB *p_dlnk;          /* Link pointer for delay list             */
+  struct OS_TCB *p_blnk;          /* Link pointer for delay list backwards   */
+  U16    delta_time;              /* Time until time out                     */
+} *P_XCB;
+
+typedef struct OS_MCB {
+  U8     cb_type;                 /* Control Block Type                      */
+  U8     state;                   /* State flag variable                     */
+  U8     isr_st;                  /* State flag variable for isr functions   */
+  struct OS_TCB *p_lnk;           /* Chain of tasks waiting for message      */
+  U16    first;                   /* Index of the message list begin         */
+  U16    last;                    /* Index of the message list end           */
+  U16    count;                   /* Actual number of stored messages        */
+  U16    size;                    /* Maximum number of stored messages       */
+  void   *msg[1];                 /* FIFO for Message pointers 1st element   */
+} *P_MCB;
+
+typedef struct OS_SCB {
+  U8     cb_type;                 /* Control Block Type                      */
+  U8     mask;                    /* Semaphore token mask                    */
+  U16    tokens;                  /* Semaphore tokens                        */
+  struct OS_TCB *p_lnk;           /* Chain of tasks waiting for tokens       */
+} *P_SCB;
+
+typedef struct OS_MUCB {
+  U8     cb_type;                 /* Control Block Type                      */
+  U16    level;                   /* Call nesting level                      */
+  struct OS_TCB *p_lnk;           /* Chain of tasks waiting for mutex        */
+  struct OS_TCB *owner;           /* Mutex owner task                        */
+  struct OS_MUCB *p_mlnk;         /* Chain of mutexes by owner task          */
+} *P_MUCB;
+
+typedef struct OS_XTMR {
+  struct OS_TMR  *next;
+  U16    tcnt;
+} *P_XTMR;
+
+typedef struct OS_TMR {
+  struct OS_TMR  *next;           /* Link pointer to Next timer              */
+  U16    tcnt;                    /* Timer delay count                       */
+  U16    info;                    /* User defined call info                  */
+} *P_TMR;
+
+typedef struct OS_BM {
+  void *free;                     /* Pointer to first free memory block      */
+  void *end;                      /* Pointer to memory block end             */
+  U32  blk_size;                  /* Memory block size                       */
+} *P_BM;
+
+/* Definitions */
+#define __TRUE          1
+#define __FALSE         0
+#define NULL            ((void *) 0)
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/HAL_CM.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/HAL_CM.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,207 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM.C
+ *      Purpose: Hardware Abstraction Layer for Cortex-M
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_HAL_CM.h"
+#include "cmsis_os.h"
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+#ifdef DBG_MSG
+BIT dbg_msg;
+#endif
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_init_stack ---------------------------------*/
+
+void rt_init_stack (P_TCB p_TCB, FUNCP task_body) {
+  /* Prepare TCB and saved context for a first time start of a task. */
+  U32 *stk,i,size;
+
+  /* Prepare a complete interrupt frame for first task start */
+  size = p_TCB->priv_stack >> 2;
+  if (size == 0U) {
+    size = (U16)os_stackinfo >> 2;
+  }
+
+  /* Write to the top of stack. */
+  stk = &p_TCB->stack[size];
+
+  /* Auto correct to 8-byte ARM stack alignment. */
+  if ((U32)stk & 0x04U) {
+    stk--;
+  }
+
+  stk -= 16;
+
+  /* Default xPSR and initial PC */
+  stk[15] = INITIAL_xPSR;
+  stk[14] = (U32)task_body;
+
+  /* Clear R4-R11,R0-R3,R12,LR registers. */
+  for (i = 0U; i < 14U; i++) {
+    stk[i] = 0U;
+  }
+
+  /* Assign a void pointer to R0. */
+  stk[8] = (U32)p_TCB->msg;
+
+  /* Initial Task stack pointer. */
+  p_TCB->tsk_stack = (U32)stk;
+
+  /* Task entry point. */
+  p_TCB->ptask = task_body;
+
+
+#ifdef __MBED_CMSIS_RTOS_CM
+  /* Set a magic word for checking of stack overflow.
+   For the main thread (ID: MAIN_THREAD_ID) the stack is in a memory area shared with the
+   heap, therefore the last word of the stack is a moving target.
+   We want to do stack/heap collision detection instead.
+   Similar applies to stack filling for the magic pattern.
+  */
+  if (p_TCB->task_id != MAIN_THREAD_ID) {
+    p_TCB->stack[0] = MAGIC_WORD;
+
+    /* Initialize stack with magic pattern. */
+    if (os_stackinfo & 0x10000000U) {
+      if (size > (16U+1U)) {
+        for (i = ((size - 16U)/2U) - 1U; i; i--) {
+          stk -= 2U;
+          stk[1] = MAGIC_PATTERN;
+          stk[0] = MAGIC_PATTERN;
+        }
+        if (--stk > p_TCB->stack) {
+          *stk = MAGIC_PATTERN;
+        }
+      }
+    }
+  }
+#else
+  /* Initialize stack with magic pattern. */
+  if (os_stackinfo & 0x10000000U) {
+    if (size > (16U+1U)) {
+      for (i = ((size - 16U)/2U) - 1U; i; i--) {
+        stk -= 2U;
+        stk[1] = MAGIC_PATTERN;
+        stk[0] = MAGIC_PATTERN;
+      }
+      if (--stk > p_TCB->stack) {
+        *stk = MAGIC_PATTERN;
+      }
+    }
+  }
+
+  /* Set a magic word for checking of stack overflow. */
+  p_TCB->stack[0] = MAGIC_WORD;
+#endif
+}
+
+
+/*--------------------------- rt_ret_val ----------------------------------*/
+
+static __inline U32 *rt_ret_regs (P_TCB p_TCB) {
+  /* Get pointer to task return value registers (R0..R3) in Stack */
+#if defined(__TARGET_FPU_VFP)
+  if (p_TCB->stack_frame) {
+    /* Extended Stack Frame: R4-R11,S16-S31,R0-R3,R12,LR,PC,xPSR,S0-S15,FPSCR */
+    return (U32 *)(p_TCB->tsk_stack + (8U*4U) + (16U*4U));
+  } else {
+    /* Basic Stack Frame: R4-R11,R0-R3,R12,LR,PC,xPSR */
+    return (U32 *)(p_TCB->tsk_stack + (8U*4U));
+  }
+#else
+  /* Stack Frame: R4-R11,R0-R3,R12,LR,PC,xPSR */
+  return (U32 *)(p_TCB->tsk_stack + (8U*4U));
+#endif
+}
+
+void rt_ret_val (P_TCB p_TCB, U32 v0) {
+  U32 *ret;
+
+  ret = rt_ret_regs(p_TCB);
+  ret[0] = v0;
+}
+
+void rt_ret_val2(P_TCB p_TCB, U32 v0, U32 v1) {
+  U32 *ret;
+
+  ret = rt_ret_regs(p_TCB);
+  ret[0] = v0;
+  ret[1] = v1;
+}
+
+
+/*--------------------------- dbg_init --------------------------------------*/
+
+#ifdef DBG_MSG
+void dbg_init (void) {
+  if (((DEMCR & DEMCR_TRCENA) != 0U)     && 
+      ((ITM_CONTROL & ITM_ITMENA) != 0U) &&
+      ((ITM_ENABLE & (1UL << 31)) != 0U)) {
+    dbg_msg = __TRUE;
+  }
+}
+#endif
+
+/*--------------------------- dbg_task_notify -------------------------------*/
+
+#ifdef DBG_MSG
+void dbg_task_notify (P_TCB p_tcb, BOOL create) {
+  while (ITM_PORT31_U32 == 0U);
+  ITM_PORT31_U32 = (U32)p_tcb->ptask;
+  while (ITM_PORT31_U32 == 0U);
+  ITM_PORT31_U16 = (U16)((create << 8) | p_tcb->task_id);
+}
+#endif
+
+/*--------------------------- dbg_task_switch -------------------------------*/
+
+#ifdef DBG_MSG
+void dbg_task_switch (U32 task_id) {
+  while (ITM_PORT31_U32 == 0U);
+  ITM_PORT31_U8 = (U8)task_id;
+}
+#endif
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/RTX_CM_lib.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/RTX_CM_lib.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,608 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RTX_CM_LIB.H
+ *      Purpose: RTX Kernel System Configuration
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+#include "mbed_error.h"
+
+#if   defined (__CC_ARM)
+#include <rt_misc.h>
+#pragma O3
+#define __USED __attribute__((used))
+#elif defined (__GNUC__)
+#pragma GCC optimize ("O3")
+#define __USED __attribute__((used))
+#elif defined (__ICCARM__)
+#define __USED __root
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      Definitions
+ *---------------------------------------------------------------------------*/
+
+#define _declare_box(pool,size,cnt)  uint32_t pool[(((size)+3)/4)*(cnt) + 3]
+#define _declare_box8(pool,size,cnt) uint64_t pool[(((size)+7)/8)*(cnt) + 2]
+
+#define OS_TCB_SIZE     64
+#define OS_TMR_SIZE     8
+
+typedef void    *OS_ID;
+typedef uint32_t OS_TID;
+typedef uint32_t OS_MUT[4];
+typedef uint32_t OS_RESULT;
+
+#if defined (__CC_ARM) && !defined (__MICROLIB)
+
+#define runtask_id()    rt_tsk_self()
+#define mutex_init(m)   rt_mut_init(m)
+#define mutex_wait(m)   os_mut_wait(m,0xFFFFU)
+#define mutex_rel(m)    os_mut_release(m)
+
+extern uint8_t   os_running;
+extern OS_TID    rt_tsk_self    (void);
+extern void      rt_mut_init    (OS_ID mutex);
+extern OS_RESULT rt_mut_release (OS_ID mutex);
+extern OS_RESULT rt_mut_wait    (OS_ID mutex, uint16_t timeout);
+
+#define os_mut_wait(mutex,timeout) _os_mut_wait((uint32_t)rt_mut_wait,mutex,timeout)
+#define os_mut_release(mutex)      _os_mut_release((uint32_t)rt_mut_release,mutex)
+
+OS_RESULT _os_mut_release (uint32_t p, OS_ID mutex)                   __svc_indirect(0);
+OS_RESULT _os_mut_wait    (uint32_t p, OS_ID mutex, uint16_t timeout) __svc_indirect(0);
+
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+#if (OS_TASKCNT == 0)
+#error "Invalid number of concurrent running threads!"
+#endif
+
+#if (OS_PRIVCNT >= OS_TASKCNT)
+#error "Too many threads with user-provided stack size!"
+#endif
+
+#if (OS_TIMERS != 0)
+#define OS_TASK_CNT (OS_TASKCNT + 1)
+#ifndef __MBED_CMSIS_RTOS_CM
+#define OS_PRIV_CNT (OS_PRIVCNT + 2)
+#define OS_STACK_SZ (4*(OS_PRIVSTKSIZE+OS_MAINSTKSIZE+OS_TIMERSTKSZ))
+#endif
+#else
+#define OS_TASK_CNT  OS_TASKCNT
+#ifndef __MBED_CMSIS_RTOS_CM
+#define OS_PRIV_CNT (OS_PRIVCNT + 1)
+#define OS_STACK_SZ (4*(OS_PRIVSTKSIZE+OS_MAINSTKSIZE))
+#endif
+#endif
+
+#ifndef OS_STKINIT
+#define OS_STKINIT  0
+#endif
+
+uint16_t const os_maxtaskrun = OS_TASK_CNT;
+#ifdef __MBED_CMSIS_RTOS_CM
+uint32_t const os_stackinfo  = (OS_STKINIT<<28) | (OS_STKCHECK<<24) | (OS_IDLESTKSIZE*4);
+#else
+uint32_t const os_stackinfo  = (OS_STKINIT<<28) | (OS_STKCHECK<<24) | (OS_PRIV_CNT<<16) | (OS_STKSIZE*4);
+#endif
+uint32_t const os_rrobin     = (OS_ROBIN << 16) | OS_ROBINTOUT;
+uint32_t const os_tickfreq   = OS_CLOCK;
+uint16_t const os_tickus_i   = OS_CLOCK/1000000;
+uint16_t const os_tickus_f   = (((uint64_t)(OS_CLOCK-1000000*(OS_CLOCK/1000000)))<<16)/1000000;
+uint32_t const os_trv        = OS_TRV;
+#if       defined(FEATURE_UVISOR) && defined(TARGET_UVISOR_SUPPORTED)
+uint8_t  const os_flags      = 0;
+#else  /* defined(FEATURE_UVISOR) && defined(TARGET_UVISOR_SUPPORTED) */
+uint8_t  const os_flags      = OS_RUNPRIV;
+#endif /* defined(FEATURE_UVISOR) && defined(TARGET_UVISOR_SUPPORTED) */
+
+/* Export following defines to uVision debugger. */
+__USED uint32_t const CMSIS_RTOS_API_Version = osCMSIS;
+__USED uint32_t const CMSIS_RTOS_RTX_Version = osCMSIS_RTX;
+__USED uint32_t const os_clockrate = OS_TICK;
+__USED uint32_t const os_timernum  = 0U;
+
+/* Memory pool for TCB allocation    */
+_declare_box  (mp_tcb, OS_TCB_SIZE, OS_TASK_CNT);
+uint16_t const mp_tcb_size = sizeof(mp_tcb);
+
+#ifdef __MBED_CMSIS_RTOS_CM
+/* Memory pool for os_idle_demon stack allocation. */
+_declare_box8 (mp_stk, OS_IDLESTKSIZE*4, 1);
+uint32_t const mp_stk_size = sizeof(mp_stk);
+#else
+/* Memory pool for System stack allocation (+os_idle_demon). */
+_declare_box8 (mp_stk, OS_STKSIZE*4, OS_TASK_CNT-OS_PRIV_CNT+1);
+uint32_t const mp_stk_size = sizeof(mp_stk);
+
+/* Memory pool for user specified stack allocation (+main, +timer) */
+uint64_t       os_stack_mem[2+OS_PRIV_CNT+(OS_STACK_SZ/8)];
+uint32_t const os_stack_sz = sizeof(os_stack_mem);
+#endif
+
+#ifndef OS_FIFOSZ
+ #define OS_FIFOSZ      16
+#endif
+
+/* Fifo Queue buffer for ISR requests.*/
+uint32_t       os_fifo[OS_FIFOSZ*2+1];
+uint8_t  const os_fifo_size = OS_FIFOSZ;
+
+/* An array of Active task pointers. */
+void *os_active_TCB[OS_TASK_CNT];
+
+/* User Timers Resources */
+#if (OS_TIMERS != 0)
+extern void osTimerThread (void const *argument);
+#ifdef __MBED_CMSIS_RTOS_CM
+osThreadDef(osTimerThread, (osPriority)(OS_TIMERPRIO-3), 4*OS_TIMERSTKSZ);
+#else
+osThreadDef(osTimerThread, (osPriority)(OS_TIMERPRIO-3), 1, 4*OS_TIMERSTKSZ);
+#endif
+osThreadId osThreadId_osTimerThread;
+osMessageQDef(osTimerMessageQ, OS_TIMERCBQS, void *);
+osMessageQId osMessageQId_osTimerMessageQ;
+#else
+osThreadDef_t os_thread_def_osTimerThread = { NULL };
+osThreadId osThreadId_osTimerThread;
+osMessageQDef(osTimerMessageQ, 0U, void *);
+osMessageQId osMessageQId_osTimerMessageQ;
+#endif
+
+/* Legacy RTX User Timers not used */
+uint32_t       os_tmr = 0U;
+uint32_t const *m_tmr = NULL;
+uint16_t const mp_tmr_size = 0U;
+
+/* singleton mutex */
+osMutexId singleton_mutex_id;
+osMutexDef(singleton_mutex);
+
+#if defined (__CC_ARM) && !defined (__MICROLIB)
+ /* A memory space for arm standard library. */
+ static uint32_t std_libspace[OS_TASK_CNT][96/4];
+ static OS_MUT   std_libmutex[OS_MUTEXCNT];
+ static uint32_t nr_mutex;
+ extern void  *__libspace_start;
+#endif
+
+#if defined (__ICCARM__)
+static osMutexId  std_mutex_id_sys[_MAX_LOCK] = {0};
+static OS_MUT     std_mutex_sys[_MAX_LOCK] = {0};
+#define _FOPEN_MAX 10
+static osMutexId  std_mutex_id_file[_FOPEN_MAX] = {0};
+static OS_MUT     std_mutex_file[_FOPEN_MAX] = {0};
+void __iar_system_Mtxinit(__iar_Rmtx *mutex) /* Initialize a system lock */
+{
+  osMutexDef_t def;
+  uint32_t index;
+  for (index = 0; index < _MAX_LOCK; index++) {
+    if (0 == std_mutex_id_sys[index]) {
+      def.mutex = &std_mutex_sys[index];
+      std_mutex_id_sys[index] = osMutexCreate(&def);
+      *mutex = (__iar_Rmtx*)&std_mutex_id_sys[index];
+      return;
+    }
+  }
+  // This should never happen
+  error("Not enough mutexes\n");
+}
+
+void __iar_system_Mtxdst(__iar_Rmtx *mutex)/*Destroy a system lock */
+{
+  osMutexDelete(*(osMutexId*)*mutex);
+  *mutex = 0;
+}
+
+void __iar_system_Mtxlock(__iar_Rmtx *mutex) /* Lock a system lock */
+{
+  osMutexWait(*(osMutexId*)*mutex, osWaitForever);
+}
+
+void __iar_system_Mtxunlock(__iar_Rmtx *mutex) /* Unlock a system lock */
+{
+  osMutexRelease(*(osMutexId*)*mutex);
+}
+
+void __iar_file_Mtxinit(__iar_Rmtx *mutex)/*Initialize a file lock */
+{
+    osMutexDef_t def;
+    uint32_t index;
+    for (index = 0; index < _FOPEN_MAX; index++) {
+      if (0 == std_mutex_id_file[index]) {
+        def.mutex = &std_mutex_file[index];
+        std_mutex_id_file[index] = osMutexCreate(&def);
+        *mutex = (__iar_Rmtx*)&std_mutex_id_file[index];
+        return;
+      }
+    }
+    // The variable _FOPEN_MAX needs to be increased
+    error("Not enough mutexes\n");
+}
+
+void __iar_file_Mtxdst(__iar_Rmtx *mutex) /* Destroy a file lock */
+{
+  osMutexDelete(*(osMutexId*)*mutex);
+  *mutex = 0;
+}
+
+void __iar_file_Mtxlock(__iar_Rmtx *mutex) /* Lock a file lock */
+{
+  osMutexWait(*(osMutexId*)*mutex, osWaitForever);
+}
+
+void __iar_file_Mtxunlock(__iar_Rmtx *mutex) /* Unlock a file lock */
+{
+  osMutexRelease(*(osMutexId*)*mutex);
+}
+
+#endif
+
+/*----------------------------------------------------------------------------
+ *      RTX Optimizations (empty functions)
+ *---------------------------------------------------------------------------*/
+
+#if OS_ROBIN == 0
+ void rt_init_robin (void) {;}
+ void rt_chk_robin  (void) {;}
+#endif
+
+#if OS_STKCHECK == 0
+ void rt_stk_check  (void) {;}
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      Standard Library multithreading interface
+ *---------------------------------------------------------------------------*/
+
+#if defined (__CC_ARM) && !defined (__MICROLIB)
+
+/*--------------------------- __user_perthread_libspace ---------------------*/
+
+void *__user_perthread_libspace (void) {
+  /* Provide a separate libspace for each task. */
+  uint32_t idx;
+
+  idx = (os_running != 0U) ? runtask_id () : 0U;
+  if (idx == 0U) {
+    /* RTX not running yet. */
+    return (&__libspace_start);
+  }
+  return ((void *)&std_libspace[idx-1]);
+}
+
+/*--------------------------- _mutex_initialize -----------------------------*/
+
+int _mutex_initialize (OS_ID *mutex) {
+  /* Allocate and initialize a system mutex. */
+
+  if (nr_mutex >= OS_MUTEXCNT) {
+    /* If you are here, you need to increase the number OS_MUTEXCNT. */
+    error("Not enough stdlib mutexes\n");
+  }
+  *mutex = &std_libmutex[nr_mutex++];
+  mutex_init (*mutex);
+  return (1);
+}
+
+
+/*--------------------------- _mutex_acquire --------------------------------*/
+
+__attribute__((used)) void _mutex_acquire (OS_ID *mutex) {
+  /* Acquire a system mutex, lock stdlib resources. */
+  if (os_running) {
+    /* RTX running, acquire a mutex. */
+    mutex_wait (*mutex);
+  }
+}
+
+
+/*--------------------------- _mutex_release --------------------------------*/
+
+__attribute__((used)) void _mutex_release (OS_ID *mutex) {
+  /* Release a system mutex, unlock stdlib resources. */
+  if (os_running) {
+    /* RTX running, release a mutex. */
+    mutex_rel (*mutex);
+  }
+}
+
+#endif
+
+
+/*----------------------------------------------------------------------------
+ *      RTX Startup
+ *---------------------------------------------------------------------------*/
+
+/* Main Thread definition */
+extern void pre_main (void);
+osThreadDef_t os_thread_def_main = {(os_pthread)pre_main, osPriorityNormal, 1U, 0U, NULL};
+
+#ifdef __CC_ARM
+#if defined(TARGET_NUMAKER_PFM_NUC472)
+extern uint32_t          Image$$ARM_LIB_HEAP$$Base[];
+#define HEAP_START      ((uint32_t) Image$$ARM_LIB_HEAP$$Base)
+#else
+extern uint32_t          Image$$RW_IRAM1$$ZI$$Limit[];
+#define HEAP_START      (Image$$RW_IRAM1$$ZI$$Limit)
+#endif
+#elif defined(__GNUC__)
+extern uint32_t          __end__[];
+#define HEAP_START      (__end__)
+#elif defined(__ICCARM__)
+#pragma section="HEAP"
+#define HEAP_END  (void *)__section_end("HEAP")
+#endif
+
+void set_main_stack(void) {
+#if defined(TARGET_NUMAKER_PFM_NUC472)
+    // Scheduler stack: OS_MAINSTKSIZE words
+    // Main thread stack: Reserved stack size - OS_MAINSTKSIZE words
+    os_thread_def_main.stack_pointer = (uint32_t *) FINAL_SP;
+    os_thread_def_main.stacksize = (uint32_t) INITIAL_SP - (uint32_t) FINAL_SP - OS_MAINSTKSIZE * 4;
+#else
+#if defined(__ICCARM__)
+    /* For IAR heap is defined  .icf file */
+    uint32_t main_stack_size = ((uint32_t)INITIAL_SP - (uint32_t)HEAP_END) - interrupt_stack_size;
+#else
+    /* For ARM , uARM, or GCC_ARM , heap can grow and reach main stack */
+#endif
+    // That is the bottom of the main stack block: no collision detection
+    os_thread_def_main.stack_pointer = HEAP_START;
+
+    // Leave OS_MAINSTKSIZE words for the scheduler and interrupts
+    os_thread_def_main.stacksize = (INITIAL_SP - (unsigned int)HEAP_START) - (OS_MAINSTKSIZE * 4);
+#endif
+}
+
+#if defined (__CC_ARM)
+
+#ifdef __MICROLIB
+
+int main(void);
+void _main_init (void) __attribute__((section(".ARM.Collect$$$$000000FF")));
+void $Super$$__cpp_initialize__aeabi_(void);
+
+void _main_init (void) {
+  osKernelInitialize();
+#ifdef __MBED_CMSIS_RTOS_CM
+  set_main_stack();
+#endif
+  osThreadCreate(&os_thread_def_main, NULL);
+  osKernelStart();
+  for (;;);
+}
+
+void $Sub$$__cpp_initialize__aeabi_(void)
+{
+  // this should invoke C++ initializers prior _main_init, we keep this empty and
+  // invoke them after _main_init (=starts RTX kernel)
+}
+
+void pre_main()
+{
+  singleton_mutex_id = osMutexCreate(osMutex(singleton_mutex));
+  $Super$$__cpp_initialize__aeabi_();
+  main();
+}
+
+#else
+
+void * armcc_heap_base;
+void * armcc_heap_top;
+
+int main(void);
+
+void pre_main (void)
+{
+    singleton_mutex_id = osMutexCreate(osMutex(singleton_mutex));
+    __rt_lib_init((unsigned)armcc_heap_base, (unsigned)armcc_heap_top);
+    main();
+}
+
+/* The single memory model is checking for stack collision at run time, verifing
+   that the heap pointer is underneath the stack pointer.
+
+   With the RTOS there is not only one stack above the heap, there are multiple
+   stacks and some of them are underneath the heap pointer.
+*/
+#pragma import(__use_two_region_memory)
+
+__asm void __rt_entry (void) {
+
+  IMPORT  __user_setup_stackheap
+  IMPORT  armcc_heap_base
+  IMPORT  armcc_heap_top
+  IMPORT  _platform_post_stackheap_init
+  IMPORT  os_thread_def_main
+  IMPORT  osKernelInitialize
+#ifdef __MBED_CMSIS_RTOS_CM
+  IMPORT  set_main_stack
+#endif
+  IMPORT  osKernelStart
+  IMPORT  osThreadCreate
+
+  /* __user_setup_stackheap returns:
+   * - Heap base in r0 (if the program uses the heap).
+   * - Stack base in sp.
+   * - Heap limit in r2 (if the program uses the heap and uses two-region memory).
+   *
+   * More info can be found in:
+   * ARM Compiler ARM C and C++ Libraries and Floating-Point Support User Guide
+   */
+  BL      __user_setup_stackheap
+  LDR     R3,=armcc_heap_base
+  LDR     R4,=armcc_heap_top
+  STR     R0,[R3]
+  STR     R2,[R4]
+  BL      _platform_post_stackheap_init
+  BL      osKernelInitialize
+#ifdef __MBED_CMSIS_RTOS_CM
+  BL      set_main_stack
+#endif
+  LDR     R0,=os_thread_def_main
+  MOVS    R1,#0
+  BL      osThreadCreate
+  BL      osKernelStart
+  /* osKernelStart should not return */
+  B       .
+
+  ALIGN
+}
+
+#endif
+
+#elif defined (__GNUC__)
+
+osMutexDef(malloc_mutex);
+static osMutexId malloc_mutex_id;
+osMutexDef(env_mutex);
+static osMutexId env_mutex_id;
+
+extern int atexit(void (*func)(void));
+extern void __libc_fini_array(void);
+extern void __libc_init_array (void);
+extern int main(int argc, char **argv);
+
+void pre_main(void) {
+    singleton_mutex_id = osMutexCreate(osMutex(singleton_mutex));
+    malloc_mutex_id = osMutexCreate(osMutex(malloc_mutex));
+    env_mutex_id = osMutexCreate(osMutex(env_mutex));
+    __libc_init_array();
+    main(0, NULL);
+}
+
+__attribute__((naked)) void software_init_hook_rtos (void) {
+  __asm (
+    "bl   osKernelInitialize\n"
+#ifdef __MBED_CMSIS_RTOS_CM
+    "bl   set_main_stack\n"
+#endif
+    "ldr  r0,=os_thread_def_main\n"
+    "movs r1,#0\n"
+    "bl   osThreadCreate\n"
+    "bl   osKernelStart\n"
+    /* osKernelStart should not return */
+    "B       .\n"
+  );
+}
+
+// Opaque declaration of _reent structure
+struct _reent;
+
+void __rtos_malloc_lock( struct _reent *_r )
+{
+    osMutexWait(malloc_mutex_id, osWaitForever);
+}
+
+void __rtos_malloc_unlock( struct _reent *_r )
+{
+    osMutexRelease(malloc_mutex_id);
+}
+
+void __rtos_env_lock( struct _reent *_r )
+{
+    osMutexWait(env_mutex_id, osWaitForever);
+}
+
+void __rtos_env_unlock( struct _reent *_r )
+{
+    osMutexRelease(env_mutex_id);
+}
+
+#elif defined (__ICCARM__)
+
+extern void* __vector_table;
+extern int  __low_level_init(void);
+extern void __iar_data_init3(void);
+extern __weak void __iar_init_core( void );
+extern __weak void __iar_init_vfp( void );
+extern void __iar_dynamic_initialization(void);
+extern void mbed_sdk_init(void);
+extern void mbed_main(void);
+extern int main(void);
+extern void exit(int arg);
+
+static uint8_t low_level_init_needed;
+
+void pre_main(void) {
+    singleton_mutex_id = osMutexCreate(osMutex(singleton_mutex));
+    if (low_level_init_needed) {
+        __iar_dynamic_initialization();
+    }
+    mbed_main();
+    main();
+}
+
+#pragma required=__vector_table
+void __iar_program_start( void )
+{
+#ifdef __MBED_CMSIS_RTOS_CM
+  __iar_init_core();
+  __iar_init_vfp();
+
+  uint8_t low_level_init_needed_local;
+
+  low_level_init_needed_local = __low_level_init();
+  if (low_level_init_needed_local) {
+    __iar_data_init3();
+    mbed_sdk_init();
+  }
+  /* Store in a global variable after RAM has been initialized */
+  low_level_init_needed = low_level_init_needed_local;
+#endif
+  osKernelInitialize();
+#ifdef __MBED_CMSIS_RTOS_CM
+  set_main_stack();
+#endif
+  osThreadCreate(&os_thread_def_main, NULL);
+  osKernelStart();
+  /* osKernelStart should not return */
+  while (1);
+}
+
+#endif
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/RTX_Conf_CM.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/RTX_Conf_CM.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,281 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RTX_Conf_CM.C
+ *      Purpose: Configuration of CMSIS RTX Kernel for Cortex-M
+ *      Rev.:    V4.70.1
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "cmsis_os.h"
+
+
+/*----------------------------------------------------------------------------
+ *      RTX User configuration part BEGIN
+ *---------------------------------------------------------------------------*/
+
+// Include per-target RTX config file
+#include "mbed_rtx4.h"
+
+//-------- <<< Use Configuration Wizard in Context Menu >>> -----------------
+//
+// <h>Thread Configuration
+// =======================
+//
+//   <o>Number of concurrent running user threads <1-250>
+//   <i> Defines max. number of user threads that will run at the same time.
+//   <i> Default: 6
+#ifndef OS_TASKCNT
+ #error "no target defined"
+#endif
+
+#ifdef __MBED_CMSIS_RTOS_CM
+//   <o>Idle stack size [bytes] <64-4096:8><#/4>
+//   <i> Defines default stack size for the Idle thread.
+#ifndef OS_IDLESTKSIZE
+ #define OS_IDLESTKSIZE 128
+#endif
+#else // __MBED_CMSIS_RTOS_CM
+//   <o>Default Thread stack size [bytes] <64-4096:8><#/4>
+//   <i> Defines default stack size for threads with osThreadDef stacksz = 0
+//   <i> Default: 200
+#ifndef OS_STKSIZE
+ #define OS_STKSIZE     200
+#endif
+#endif // __MBED_CMSIS_RTOS_CM
+
+//   <o>Main Thread stack size [bytes] <64-32768:8><#/4>
+#ifndef OS_MAINSTKSIZE
+ #error "no target defined"
+#endif
+
+#ifndef __MBED_CMSIS_RTOS_CM
+//   <o>Number of threads with user-provided stack size <0-250>
+//   <i> Defines the number of threads with user-provided stack size.
+//   <i> Default: 0
+#ifndef OS_PRIVCNT
+ #define OS_PRIVCNT     0
+#endif
+
+//   <o>Total stack size [bytes] for threads with user-provided stack size <0-1048576:8><#/4>
+//   <i> Defines the combined stack size for threads with user-provided stack size.
+//   <i> Default: 0
+#ifndef OS_PRIVSTKSIZE
+ #define OS_PRIVSTKSIZE 0       // this stack size value is in words
+#endif
+#endif // __MBED_CMSIS_RTOS_CM
+
+//   <q>Stack overflow checking
+//   <i> Enable stack overflow checks at thread switch.
+//   <i> Enabling this option increases slightly the execution time of a thread switch.
+#ifndef OS_STKCHECK
+ #define OS_STKCHECK    1
+#endif
+
+//   <q>Stack usage watermark
+//   <i> Initialize thread stack with watermark pattern for analyzing stack usage (current/maximum) in System and Thread Viewer.
+//   <i> Enabling this option increases significantly the execution time of osThreadCreate.
+#ifndef OS_STKINIT
+  #if (defined(MBED_STACK_STATS_ENABLED) && MBED_STACK_STATS_ENABLED)
+   #define OS_STKINIT   1
+  #else
+   #define OS_STKINIT   0
+  #endif
+#endif
+
+//   <o>Processor mode for thread execution
+//     <0=> Unprivileged mode
+//     <1=> Privileged mode
+//   <i> Default: Privileged mode
+#ifndef OS_RUNPRIV
+ #define OS_RUNPRIV     1
+#endif
+
+// </h>
+
+// <h>RTX Kernel Timer Tick Configuration
+// ======================================
+//   <q> Use Cortex-M SysTick timer as RTX Kernel Timer
+//   <i> Cortex-M processors provide in most cases a SysTick timer that can be used as
+//   <i> as time-base for RTX.
+#ifndef OS_SYSTICK
+ #define OS_SYSTICK                1
+#endif
+//
+//   <o>RTOS Kernel Timer input clock frequency [Hz] <1-1000000000>
+//   <i> Defines the input frequency of the RTOS Kernel Timer.
+//   <i> When the Cortex-M SysTick timer is used, the input clock
+//   <i> is on most systems identical with the core clock.
+#ifndef OS_CLOCK
+ #error "no target defined"
+#endif
+
+//   <o>RTX Timer tick interval value [us] <1-1000000>
+//   <i> The RTX Timer tick interval value is used to calculate timeout values.
+//   <i> When the Cortex-M SysTick timer is enabled, the value also configures the SysTick timer.
+//   <i> Default: 1000  (1ms)
+#ifndef OS_TICK
+ #define OS_TICK        1000
+#endif
+
+// </h>
+
+// <h>System Configuration
+// =======================
+//
+// <e>Round-Robin Thread switching
+// ===============================
+//
+// <i> Enables Round-Robin Thread switching.
+#ifndef OS_ROBIN
+ #define OS_ROBIN       1
+#endif
+
+//   <o>Round-Robin Timeout [ticks] <1-1000>
+//   <i> Defines how long a thread will execute before a thread switch.
+//   <i> Default: 5
+#ifndef OS_ROBINTOUT
+ #define OS_ROBINTOUT   5
+#endif
+
+// </e>
+
+// <e>User Timers
+// ==============
+//   <i> Enables user Timers
+#ifndef OS_TIMERS
+ #define OS_TIMERS      1
+#endif
+
+//   <o>Timer Thread Priority
+//                        <1=> Low
+//     <2=> Below Normal  <3=> Normal  <4=> Above Normal
+//                        <5=> High
+//                        <6=> Realtime (highest)
+//   <i> Defines priority for Timer Thread
+//   <i> Default: High
+#ifndef OS_TIMERPRIO
+ #define OS_TIMERPRIO   5
+#endif
+
+//   <o>Timer Thread stack size [bytes] <64-4096:8><#/4>
+//   <i> Defines stack size for Timer thread.
+//   <i> Default: 200
+#ifndef OS_TIMERSTKSZ
+ #define OS_TIMERSTKSZ  200
+#endif
+
+//   <o>Timer Callback Queue size <1-32>
+//   <i> Number of concurrent active timer callback functions.
+//   <i> Default: 4
+#ifndef OS_TIMERCBQS
+ #define OS_TIMERCBQS   4
+#endif
+
+// </e>
+
+//   <o>ISR FIFO Queue size<4=>   4 entries  <8=>   8 entries
+//                         <12=> 12 entries  <16=> 16 entries
+//                         <24=> 24 entries  <32=> 32 entries
+//                         <48=> 48 entries  <64=> 64 entries
+//                         <96=> 96 entries
+//   <i> ISR functions store requests to this buffer,
+//   <i> when they are called from the interrupt handler.
+//   <i> Default: 16 entries
+#ifndef OS_FIFOSZ
+ #define OS_FIFOSZ      16
+#endif
+
+// </h>
+
+//------------- <<< end of configuration section >>> -----------------------
+
+// Standard library system mutexes
+// ===============================
+//  Define max. number system mutexes that are used to protect
+//  the arm standard runtime library. For microlib they are not used.
+#ifndef OS_MUTEXCNT
+ #define OS_MUTEXCNT    12
+#endif
+
+/*----------------------------------------------------------------------------
+ *      RTX User configuration part END
+ *---------------------------------------------------------------------------*/
+
+#define OS_TRV          ((uint32_t)(((double)OS_CLOCK*(double)OS_TICK)/1E6)-1)
+
+
+/*----------------------------------------------------------------------------
+ *      OS Idle daemon
+ *---------------------------------------------------------------------------*/
+extern void rtos_idle_loop(void);
+
+void os_idle_demon (void) {
+    /* The idle demon is a system thread, running when no other thread is      */
+    /* ready to run.                                                           */
+    rtos_idle_loop();
+}
+
+/*----------------------------------------------------------------------------
+ *      RTX Errors
+ *---------------------------------------------------------------------------*/
+extern void error(const char* format, ...);
+extern osThreadId svcThreadGetId (void);
+
+void os_error (uint32_t err_code) {
+    /* This function is called when a runtime error is detected. Parameter     */
+    /* 'err_code' holds the runtime error code (defined in RTX_Config.h).      */
+    osThreadId err_task = svcThreadGetId();
+    error("RTX error code: 0x%08X, task ID: 0x%08X\n", err_code, err_task);
+}
+
+void sysThreadError(osStatus status) {
+    if (status != osOK) {
+        osThreadId err_task = svcThreadGetId();
+        error("CMSIS-RTOS error status: 0x%08X, task ID: 0x%08X\n", status, err_task);
+    }
+}
+
+/*----------------------------------------------------------------------------
+ *      RTX Hooks
+ *---------------------------------------------------------------------------*/
+extern void thread_terminate_hook(osThreadId id);
+
+void sysThreadTerminate(osThreadId id) {
+    thread_terminate_hook(id);
+}
+
+/*----------------------------------------------------------------------------
+ *      RTX Configuration Functions
+ *---------------------------------------------------------------------------*/
+
+#include "RTX_CM_lib.h"
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/RTX_Config.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/RTX_Config.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,84 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RTX_CONFIG.H
+ *      Purpose: Exported functions of RTX_Config.c
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used 
+ *    to endorse or promote products derived from this software without 
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+
+/* Error Codes */
+#define OS_ERR_STK_OVF          1U
+#define OS_ERR_FIFO_OVF         2U
+#define OS_ERR_MBX_OVF          3U
+#define OS_ERR_TIMER_OVF        4U
+
+/* Definitions */
+#define BOX_ALIGN_8                   0x80000000U
+#define _declare_box(pool,size,cnt)   U32 pool[(((size)+3)/4)*(cnt) + 3]
+#define _declare_box8(pool,size,cnt)  U64 pool[(((size)+7)/8)*(cnt) + 2]
+#define _init_box8(pool,size,bsize)   _init_box (pool,size,(bsize) | BOX_ALIGN_8)
+
+/* Variables */
+extern U32 mp_tcb[];
+extern U64 mp_stk[];
+extern U32 os_fifo[];
+extern void *os_active_TCB[];
+
+/* Constants */
+extern U16 const os_maxtaskrun;
+extern U32 const os_trv;
+extern U8  const os_flags;
+extern U32 const os_stackinfo;
+extern U32 const os_rrobin;
+extern U32 const os_clockrate;
+extern U32 const os_timernum;
+extern U16 const mp_tcb_size;
+extern U32 const mp_stk_size;
+extern U32 const *m_tmr;
+extern U16 const mp_tmr_size;
+extern U8  const os_fifo_size;
+
+/* Functions */
+extern void os_idle_demon   (void);
+extern S32  os_tick_init    (void);
+extern U32  os_tick_val     (void);
+extern U32  os_tick_ovf     (void);
+extern void os_tick_irqack  (void);
+extern void os_tmr_call     (U16  info);
+extern void os_error        (U32 err_code);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_ARM/HAL_CM0.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_ARM/HAL_CM0.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,301 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM0.C
+ *      Purpose: Hardware Abstraction Layer for Cortex-M0
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_HAL_CM.h"
+#include "rt_Task.h"
+#include "rt_MemBox.h"
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_set_PSP ------------------------------------*/
+
+__asm void rt_set_PSP (U32 stack) {
+        MSR     PSP,R0
+        BX      LR
+}
+
+
+/*--------------------------- rt_get_PSP ------------------------------------*/
+
+__asm U32 rt_get_PSP (void) {
+        MRS     R0,PSP
+        BX      LR
+}
+
+
+/*--------------------------- os_set_env ------------------------------------*/
+
+__asm void os_set_env (void) {
+   /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
+        MOV     R0,SP                   ; PSP = MSP
+        MSR     PSP,R0
+        LDR     R0,=__cpp(&os_flags)
+        LDRB    R0,[R0]
+        LSLS    R0,#31
+        BNE     PrivilegedE
+        MOVS    R0,#0x03                ; Unprivileged Thread mode, use PSP
+        MSR     CONTROL,R0
+        BX      LR
+PrivilegedE
+        MOVS    R0,#0x02                ; Privileged Thread mode, use PSP
+        MSR     CONTROL,R0
+        BX      LR
+
+        ALIGN
+}
+
+
+/*--------------------------- _alloc_box ------------------------------------*/
+
+__asm void *_alloc_box (void *box_mem) {
+   /* Function wrapper for Unprivileged/Privileged mode. */
+        LDR     R3,=__cpp(rt_alloc_box)
+        MOV     R12,R3
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BNE     PrivilegedA
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BEQ     PrivilegedA
+        SVC     0
+        BX      LR
+PrivilegedA
+        BX      R12
+
+        ALIGN
+}
+
+
+/*--------------------------- _free_box -------------------------------------*/
+
+__asm U32 _free_box (void *box_mem, void *box) {
+   /* Function wrapper for Unprivileged/Privileged mode. */
+        LDR     R3,=__cpp(rt_free_box)
+        MOV     R12,R3
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BNE     PrivilegedF
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BEQ     PrivilegedF
+        SVC     0
+        BX      LR
+PrivilegedF
+        BX      R12
+
+        ALIGN
+}
+
+
+/*-------------------------- SVC_Handler ------------------------------------*/
+
+__asm void SVC_Handler (void) {
+        PRESERVE8
+
+        IMPORT  SVC_Count
+        IMPORT  SVC_Table
+        IMPORT  rt_stk_check
+
+        MRS     R0,PSP                  ; Read PSP
+        LDR     R1,[R0,#24]             ; Read Saved PC from Stack
+        SUBS    R1,R1,#2                ; Point to SVC Instruction
+        LDRB    R1,[R1]                 ; Load SVC Number
+        CMP     R1,#0
+        BNE     SVC_User                ; User SVC Number > 0
+
+        MOV     LR,R4
+        LDMIA   R0,{R0-R3,R4}           ; Read R0-R3,R12 from stack
+        MOV     R12,R4
+        MOV     R4,LR
+        BLX     R12                     ; Call SVC Function
+
+        MRS     R3,PSP                  ; Read PSP
+        STMIA   R3!,{R0-R2}             ; Store return values
+
+        LDR     R3,=__cpp(&os_tsk)
+        LDMIA   R3!,{R1,R2}             ; os_tsk.run, os_tsk.new
+        CMP     R1,R2
+        BEQ     SVC_Exit                ; no task switch
+
+        SUBS    R3,#8
+        CMP     R1,#0                   ; Runtask deleted?
+        BEQ     SVC_Next
+
+        MRS     R0,PSP                  ; Read PSP
+        SUBS    R0,R0,#32               ; Adjust Start Address
+        STR     R0,[R1,#TCB_TSTACK]     ; Update os_tsk.run->tsk_stack
+        STMIA   R0!,{R4-R7}             ; Save old context (R4-R7)
+        MOV     R4,R8
+        MOV     R5,R9
+        MOV     R6,R10
+        MOV     R7,R11
+        STMIA   R0!,{R4-R7}             ; Save old context (R8-R11)
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            ; Check for Stack overflow
+        POP     {R2,R3}
+
+SVC_Next
+        STR     R2,[R3]                 ; os_tsk.run = os_tsk.new
+
+        LDR     R0,[R2,#TCB_TSTACK]     ; os_tsk.new->tsk_stack
+        ADDS    R0,R0,#16               ; Adjust Start Address
+        LDMIA   R0!,{R4-R7}             ; Restore new Context (R8-R11)
+        MOV     R8,R4
+        MOV     R9,R5
+        MOV     R10,R6
+        MOV     R11,R7
+        MSR     PSP,R0                  ; Write PSP
+        SUBS    R0,R0,#32               ; Adjust Start Address
+        LDMIA   R0!,{R4-R7}             ; Restore new Context (R4-R7)
+
+SVC_Exit
+        MOVS    R0,#:NOT:0xFFFFFFFD     ; Set EXC_RETURN value
+        MVNS    R0,R0
+        BX      R0                      ; RETI to Thread Mode, use PSP
+
+        /*------------------- User SVC ------------------------------*/
+
+SVC_User
+        PUSH    {R4,LR}                 ; Save Registers
+        LDR     R2,=SVC_Count
+        LDR     R2,[R2]
+        CMP     R1,R2
+        BHI     SVC_Done                ; Overflow
+
+        LDR     R4,=SVC_Table-4
+        LSLS    R1,R1,#2
+        LDR     R4,[R4,R1]              ; Load SVC Function Address
+        MOV     LR,R4
+
+        LDMIA   R0,{R0-R3,R4}           ; Read R0-R3,R12 from stack
+        MOV     R12,R4
+        BLX     LR                      ; Call SVC Function
+
+        MRS     R4,PSP                  ; Read PSP
+        STMIA   R4!,{R0-R3}             ; Function return values
+SVC_Done
+        POP     {R4,PC}                 ; RETI
+
+        ALIGN
+}
+
+
+/*-------------------------- PendSV_Handler ---------------------------------*/
+
+__asm void PendSV_Handler (void) {
+        PRESERVE8
+
+        BL      __cpp(rt_pop_req)
+
+Sys_Switch
+        LDR     R3,=__cpp(&os_tsk)
+        LDMIA   R3!,{R1,R2}             ; os_tsk.run, os_tsk.new
+        CMP     R1,R2
+        BEQ     Sys_Exit                ; no task switch
+
+        SUBS    R3,#8
+
+        MRS     R0,PSP                  ; Read PSP
+        SUBS    R0,R0,#32               ; Adjust Start Address
+        STR     R0,[R1,#TCB_TSTACK]     ; Update os_tsk.run->tsk_stack
+        STMIA   R0!,{R4-R7}             ; Save old context (R4-R7)
+        MOV     R4,R8
+        MOV     R5,R9
+        MOV     R6,R10
+        MOV     R7,R11
+        STMIA   R0!,{R4-R7}             ; Save old context (R8-R11)
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            ; Check for Stack overflow
+        POP     {R2,R3}
+
+        STR     R2,[R3]                 ; os_tsk.run = os_tsk.new
+
+        LDR     R0,[R2,#TCB_TSTACK]     ; os_tsk.new->tsk_stack
+        ADDS    R0,R0,#16               ; Adjust Start Address
+        LDMIA   R0!,{R4-R7}             ; Restore new Context (R8-R11)
+        MOV     R8,R4
+        MOV     R9,R5
+        MOV     R10,R6
+        MOV     R11,R7
+        MSR     PSP,R0                  ; Write PSP
+        SUBS    R0,R0,#32               ; Adjust Start Address
+        LDMIA   R0!,{R4-R7}             ; Restore new Context (R4-R7)
+
+Sys_Exit
+        MOVS    R0,#:NOT:0xFFFFFFFD     ; Set EXC_RETURN value
+        MVNS    R0,R0
+        BX      R0                      ; RETI to Thread Mode, use PSP
+
+        ALIGN
+}
+
+
+/*-------------------------- SysTick_Handler --------------------------------*/
+
+__asm void SysTick_Handler (void) {
+        PRESERVE8
+
+        BL      __cpp(rt_systick)
+        B       Sys_Switch
+
+        ALIGN
+}
+
+
+/*-------------------------- OS_Tick_Handler --------------------------------*/
+
+__asm void OS_Tick_Handler (void) {
+        PRESERVE8
+
+        BL      __cpp(os_tick_irqack)
+        BL      __cpp(rt_systick)
+        B       Sys_Switch
+
+        ALIGN
+}
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_ARM/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_ARM/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,57 @@
+;/*----------------------------------------------------------------------------
+; *      CMSIS-RTOS  -  RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.70
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used
+; *    to endorse or promote products derived from this software without
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+                AREA    SVC_TABLE, CODE, READONLY
+
+                EXPORT  SVC_Count
+
+SVC_Cnt         EQU    (SVC_End-SVC_Table)/4
+SVC_Count       DCD     SVC_Cnt
+
+; Import user SVC functions here.
+;               IMPORT  __SVC_1
+
+                EXPORT  SVC_Table
+SVC_Table
+; Insert user SVC functions here. SVC 0 used by RTL Kernel.
+;               DCD     __SVC_1                 ; user SVC function
+
+SVC_End
+
+                END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_GCC/HAL_CM0.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_GCC/HAL_CM0.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,370 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM0.S
+ *      Purpose: Hardware Abstraction Layer for Cortex-M0
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+        .file   "HAL_CM0.S"
+        .syntax unified
+
+        .equ    TCB_TSTACK, 44
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+        .thumb
+
+        .section ".text"
+        .align  2
+
+
+/*--------------------------- rt_set_PSP ------------------------------------*/
+
+#       void rt_set_PSP (U32 stack);
+
+        .thumb_func
+        .type   rt_set_PSP, %function
+        .global rt_set_PSP
+rt_set_PSP:
+        .fnstart
+        .cantunwind
+
+        MSR     PSP,R0
+        BX      LR
+
+        .fnend
+        .size   rt_set_PSP, .-rt_set_PSP
+
+
+/*--------------------------- rt_get_PSP ------------------------------------*/
+
+#       U32 rt_get_PSP (void);
+
+        .thumb_func
+        .type   rt_get_PSP, %function
+        .global rt_get_PSP
+rt_get_PSP:
+        .fnstart
+        .cantunwind
+
+        MRS     R0,PSP
+        BX      LR
+
+        .fnend
+        .size   rt_get_PSP, .-rt_get_PSP
+
+
+/*--------------------------- os_set_env ------------------------------------*/
+
+#       void os_set_env (void);
+        /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
+
+        .thumb_func
+        .type   os_set_env, %function
+        .global os_set_env
+os_set_env:
+        .fnstart
+        .cantunwind
+
+        MOV     R0,SP                   /* PSP = MSP */
+        MSR     PSP,R0
+        LDR     R0,=os_flags
+        LDRB    R0,[R0]
+        LSLS    R0,#31
+        BNE     PrivilegedE
+        MOVS    R0,#0x03                /* Unprivileged Thread mode, use PSP */
+        MSR     CONTROL,R0
+        BX      LR
+PrivilegedE:
+        MOVS    R0,#0x02                /* Privileged Thread mode, use PSP */
+        MSR     CONTROL,R0
+        BX      LR
+
+        .fnend
+        .size   os_set_env, .-os_set_env
+
+
+/*--------------------------- _alloc_box ------------------------------------*/
+
+#      void *_alloc_box (void *box_mem);
+       /* Function wrapper for Unprivileged/Privileged mode. */
+
+        .thumb_func
+        .type   _alloc_box, %function
+        .global _alloc_box
+_alloc_box:
+        .fnstart
+        .cantunwind
+
+        LDR     R3,=rt_alloc_box
+        MOV     R12,R3
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BNE     PrivilegedA
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BEQ     PrivilegedA
+        SVC     0
+        BX      LR
+PrivilegedA:
+        BX      R12
+
+        .fnend
+        .size   _alloc_box, .-_alloc_box
+
+
+/*--------------------------- _free_box -------------------------------------*/
+
+#       U32 _free_box (void *box_mem, void *box);
+        /* Function wrapper for Unprivileged/Privileged mode. */
+
+        .thumb_func
+        .type   _free_box, %function
+        .global _free_box
+_free_box:
+        .fnstart
+        .cantunwind
+
+        LDR     R3,=rt_free_box
+        MOV     R12,R3
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BNE     PrivilegedF
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BEQ     PrivilegedF
+        SVC     0
+        BX      LR
+PrivilegedF:
+        BX      R12
+
+        .fnend
+        .size   _free_box, .-_free_box
+
+
+/*-------------------------- SVC_Handler ------------------------------------*/
+
+#       void SVC_Handler (void);
+
+        .thumb_func
+        .type   SVC_Handler, %function
+        .global SVC_Handler
+SVC_Handler:
+        .fnstart
+        .cantunwind
+
+        MRS     R0,PSP                  /* Read PSP */
+        LDR     R1,[R0,#24]             /* Read Saved PC from Stack */
+        SUBS    R1,R1,#2                /* Point to SVC Instruction */
+        LDRB    R1,[R1]                 /* Load SVC Number */
+        CMP     R1,#0
+        BNE     SVC_User                /* User SVC Number > 0 */
+
+        MOV     LR,R4
+        LDMIA   R0,{R0-R3,R4}           /* Read R0-R3,R12 from stack */
+        MOV     R12,R4
+        MOV     R4,LR
+        BLX     R12                     /* Call SVC Function */
+
+        MRS     R3,PSP                  /* Read PSP */
+        STMIA   R3!,{R0-R2}             /* Store return values */
+
+        LDR     R3,=os_tsk
+        LDMIA   R3!,{R1,R2}             /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+        BEQ     SVC_Exit                /* no task switch */
+
+        SUBS    R3,#8
+        CMP     R1,#0                   /* Runtask deleted? */
+        BEQ     SVC_Next
+
+        MRS     R0,PSP                  /* Read PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        STR     R0,[R1,#TCB_TSTACK]     /* Update os_tsk.run->tsk_stack */
+        STMIA   R0!,{R4-R7}             /* Save old context (R4-R7) */
+        MOV     R4,R8
+        MOV     R5,R9
+        MOV     R6,R10
+        MOV     R7,R11
+        STMIA   R0!,{R4-R7}             /* Save old context (R8-R11) */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+SVC_Next:
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R0,[R2,#TCB_TSTACK]     /* os_tsk.new->tsk_stack */
+        ADDS    R0,R0,#16               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R8-R11) */
+        MOV     R8,R4
+        MOV     R9,R5
+        MOV     R10,R6
+        MOV     R11,R7
+        MSR     PSP,R0                  /* Write PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R4-R7) */
+
+SVC_Exit:
+        MOVS    R0,#~0xFFFFFFFD         /* Set EXC_RETURN value */
+        MVNS    R0,R0
+        BX      R0                      /* RETI to Thread Mode, use PSP */
+
+        /*------------------- User SVC ------------------------------*/
+
+SVC_User:
+        PUSH    {R4,LR}                 /* Save Registers */
+        LDR     R2,=SVC_Count
+        LDR     R2,[R2]
+        CMP     R1,R2
+        BHI     SVC_Done                /* Overflow */
+
+        LDR     R4,=SVC_Table-4
+        LSLS    R1,R1,#2
+        LDR     R4,[R4,R1]              /* Load SVC Function Address */
+        MOV     LR,R4
+
+        LDMIA   R0,{R0-R3,R4}           /* Read R0-R3,R12 from stack */
+        MOV     R12,R4
+        BLX     LR                      /* Call SVC Function */
+
+        MRS     R4,PSP                  /* Read PSP */
+        STMIA   R4!,{R0-R3}             /* Function return values */
+SVC_Done:
+        POP     {R4,PC}                 /* RETI */
+
+        .fnend
+        .size   SVC_Handler, .-SVC_Handler
+
+
+/*-------------------------- PendSV_Handler ---------------------------------*/
+
+#       void PendSV_Handler (void);
+
+        .thumb_func
+        .type   PendSV_Handler, %function
+        .global PendSV_Handler
+        .global Sys_Switch
+PendSV_Handler:
+        .fnstart
+        .cantunwind
+
+        BL      rt_pop_req
+
+Sys_Switch:
+        LDR     R3,=os_tsk
+        LDMIA   R3!,{R1,R2}             /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+        BEQ     Sys_Exit                /* no task switch */
+
+        SUBS    R3,#8
+
+        MRS     R0,PSP                  /* Read PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        STR     R0,[R1,#TCB_TSTACK]     /* Update os_tsk.run->tsk_stack */
+        STMIA   R0!,{R4-R7}             /* Save old context (R4-R7) */
+        MOV     R4,R8
+        MOV     R5,R9
+        MOV     R6,R10
+        MOV     R7,R11
+        STMIA   R0!,{R4-R7}             /* Save old context (R8-R11) */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R0,[R2,#TCB_TSTACK]     /* os_tsk.new->tsk_stack */
+        ADDS    R0,R0,#16               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R8-R11) */
+        MOV     R8,R4
+        MOV     R9,R5
+        MOV     R10,R6
+        MOV     R11,R7
+        MSR     PSP,R0                  /* Write PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R4-R7) */
+
+Sys_Exit:
+        MOVS    R0,#~0xFFFFFFFD         /* Set EXC_RETURN value */
+        MVNS    R0,R0
+        BX      R0                      /* RETI to Thread Mode, use PSP */
+
+        .fnend
+        .size   PendSV_Handler, .-PendSV_Handler
+
+
+/*-------------------------- SysTick_Handler --------------------------------*/
+
+#       void SysTick_Handler (void);
+
+        .thumb_func
+        .type   SysTick_Handler, %function
+        .global SysTick_Handler
+SysTick_Handler:
+        .fnstart
+        .cantunwind
+
+        BL      rt_systick
+        B       Sys_Switch
+
+        .fnend
+        .size   SysTick_Handler, .-SysTick_Handler
+
+
+/*-------------------------- OS_Tick_Handler --------------------------------*/
+
+#       void OS_Tick_Handler (void);
+
+        .thumb_func
+        .type   OS_Tick_Handler, %function
+        .global OS_Tick_Handler
+OS_Tick_Handler:
+        .fnstart
+        .cantunwind
+
+        BL      os_tick_irqack
+        BL      rt_systick
+        B       Sys_Switch
+
+        .fnend
+        .size   OS_Tick_Handler, .-OS_Tick_Handler
+
+
+        .end
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_GCC/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_GCC/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,56 @@
+;/*----------------------------------------------------------------------------
+; *      CMSIS-RTOS - RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.70
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used
+; *    to endorse or promote products derived from this software without
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+        .file   "SVC_Table.S"
+
+
+        .section ".svc_table"
+
+        .global  SVC_Table
+SVC_Table:
+/* Insert user SVC functions here. SVC 0 used by RTL Kernel. */
+#       .long   __SVC_1                 /* user SVC function */
+SVC_End:
+
+        .global  SVC_Count
+SVC_Count:
+        .long   (SVC_End-SVC_Table)/4
+
+
+        .end
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_IAR/HAL_CM0.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_IAR/HAL_CM0.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,312 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM0.S
+ *      Purpose: Hardware Abstraction Layer for Cortex-M0
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+        NAME    HAL_CM0.S
+
+        #define TCB_TSTACK 44
+
+        EXTERN  os_flags
+        EXTERN  os_tsk
+        EXTERN  rt_alloc_box
+        EXTERN  rt_free_box
+        EXTERN  rt_stk_check
+        EXTERN  rt_pop_req
+        EXTERN  rt_systick
+        EXTERN  os_tick_irqack
+        EXTERN  SVC_Table
+        EXTERN  SVC_Count
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+        SECTION .text:CODE:NOROOT(2)
+        THUMB
+
+/*--------------------------- rt_set_PSP ------------------------------------*/
+
+;       void rt_set_PSP (U32 stack);
+
+        PUBLIC  rt_set_PSP
+rt_set_PSP:
+
+        MSR     PSP,R0
+        BX      LR
+
+
+/*--------------------------- rt_get_PSP ------------------------------------*/
+
+;       U32 rt_get_PSP (void);
+
+        PUBLIC  rt_get_PSP
+rt_get_PSP:
+
+        MRS     R0,PSP
+        BX      LR
+
+
+/*--------------------------- os_set_env ------------------------------------*/
+
+;       void os_set_env (void);
+        /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
+
+        PUBLIC  os_set_env
+os_set_env:
+
+        MOV     R0,SP                   /* PSP = MSP */
+        MSR     PSP,R0
+        LDR     R0,=os_flags
+        LDRB    R0,[R0]
+        LSLS    R0,#31
+        BNE     PrivilegedE
+        MOVS    R0,#0x03                /* Unprivileged Thread mode, use PSP */
+        MSR     CONTROL,R0
+        BX      LR
+PrivilegedE:
+        MOVS    R0,#0x02                /* Privileged Thread mode, use PSP */
+        MSR     CONTROL,R0
+        BX      LR
+
+
+/*--------------------------- _alloc_box ------------------------------------*/
+
+;      void *_alloc_box (void *box_mem);
+       /* Function wrapper for Unprivileged/Privileged mode. */
+
+        PUBLIC  _alloc_box
+_alloc_box:
+
+        LDR     R3,=rt_alloc_box
+        MOV     R12,R3
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BNE     PrivilegedA
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BEQ     PrivilegedA
+        SVC     0
+        BX      LR
+PrivilegedA:
+        BX      R12
+
+
+/*--------------------------- _free_box -------------------------------------*/
+
+;       U32 _free_box (void *box_mem, void *box);
+        /* Function wrapper for Unprivileged/Privileged mode. */
+
+        PUBLIC  _free_box
+_free_box:
+
+        LDR     R3,=rt_free_box
+        MOV     R12,R3
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BNE     PrivilegedF
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BEQ     PrivilegedF
+        SVC     0
+        BX      LR
+PrivilegedF:
+        BX      R12
+
+
+/*-------------------------- SVC_Handler ------------------------------------*/
+
+;       void SVC_Handler (void);
+
+        PUBLIC  SVC_Handler
+SVC_Handler:
+
+        MRS     R0,PSP                  /* Read PSP */
+        LDR     R1,[R0,#24]             /* Read Saved PC from Stack */
+        SUBS    R1,R1,#2                /* Point to SVC Instruction */
+        LDRB    R1,[R1]                 /* Load SVC Number */
+        CMP     R1,#0
+        BNE     SVC_User                /* User SVC Number > 0 */
+
+        MOV     LR,R4
+        LDMIA   R0,{R0-R3,R4}           /* Read R0-R3,R12 from stack */
+        MOV     R12,R4
+        MOV     R4,LR
+        BLX     R12                     /* Call SVC Function */
+
+        MRS     R3,PSP                  /* Read PSP */
+        STMIA   R3!,{R0-R2}             /* Store return values */
+
+        LDR     R3,=os_tsk
+        LDMIA   R3!,{R1,R2}             /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+        BEQ     SVC_Exit                /* no task switch */
+
+        SUBS    R3,#8
+        CMP     R1,#0                   /* Runtask deleted? */
+        BEQ     SVC_Next
+
+        MRS     R0,PSP                  /* Read PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        STR     R0,[R1,#TCB_TSTACK]     /* Update os_tsk.run->tsk_stack */
+        STMIA   R0!,{R4-R7}             /* Save old context (R4-R7) */
+        MOV     R4,R8
+        MOV     R5,R9
+        MOV     R6,R10
+        MOV     R7,R11
+        STMIA   R0!,{R4-R7}             /* Save old context (R8-R11) */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+SVC_Next:
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R0,[R2,#TCB_TSTACK]     /* os_tsk.new->tsk_stack */
+        ADDS    R0,R0,#16               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R8-R11) */
+        MOV     R8,R4
+        MOV     R9,R5
+        MOV     R10,R6
+        MOV     R11,R7
+        MSR     PSP,R0                  /* Write PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R4-R7) */
+
+SVC_Exit:
+        MOVS    R0,#~0xFFFFFFFD         /* Set EXC_RETURN value */
+        MVNS    R0,R0
+        BX      R0                      /* RETI to Thread Mode, use PSP */
+
+        /*------------------- User SVC ------------------------------*/
+
+SVC_User:
+        PUSH    {R4,LR}                 /* Save Registers */
+        LDR     R2,=SVC_Count
+        LDR     R2,[R2]
+        CMP     R1,R2
+        BHI     SVC_Done                /* Overflow */
+
+        LDR     R4,=SVC_Table-4
+        LSLS    R1,R1,#2
+        LDR     R4,[R4,R1]              /* Load SVC Function Address */
+        MOV     LR,R4
+
+        LDMIA   R0,{R0-R3,R4}           /* Read R0-R3,R12 from stack */
+        MOV     R12,R4
+        BLX     LR                      /* Call SVC Function */
+
+        MRS     R4,PSP                  /* Read PSP */
+        STMIA   R4!,{R0-R3}             /* Function return values */
+SVC_Done:
+        POP     {R4,PC}                 /* RETI */
+
+
+/*-------------------------- PendSV_Handler ---------------------------------*/
+
+;       void PendSV_Handler (void);
+
+        PUBLIC  PendSV_Handler
+PendSV_Handler:
+
+        BL      rt_pop_req
+
+Sys_Switch:
+        LDR     R3,=os_tsk
+        LDMIA   R3!,{R1,R2}             /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+        BEQ     Sys_Exit                /* no task switch */
+
+        SUBS    R3,#8
+
+        MRS     R0,PSP                  /* Read PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        STR     R0,[R1,#TCB_TSTACK]     /* Update os_tsk.run->tsk_stack */
+        STMIA   R0!,{R4-R7}             /* Save old context (R4-R7) */
+        MOV     R4,R8
+        MOV     R5,R9
+        MOV     R6,R10
+        MOV     R7,R11
+        STMIA   R0!,{R4-R7}             /* Save old context (R8-R11) */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R0,[R2,#TCB_TSTACK]     /* os_tsk.new->tsk_stack */
+        ADDS    R0,R0,#16               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R8-R11) */
+        MOV     R8,R4
+        MOV     R9,R5
+        MOV     R10,R6
+        MOV     R11,R7
+        MSR     PSP,R0                  /* Write PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R4-R7) */
+
+Sys_Exit:
+        MOVS    R0,#~0xFFFFFFFD         /* Set EXC_RETURN value */
+        MVNS    R0,R0
+        BX      R0                      /* RETI to Thread Mode, use PSP */
+
+
+/*-------------------------- SysTick_Handler --------------------------------*/
+
+;       void SysTick_Handler (void);
+
+        PUBLIC  SysTick_Handler
+SysTick_Handler:
+
+        BL      rt_systick
+        B       Sys_Switch
+
+
+/*-------------------------- OS_Tick_Handler --------------------------------*/
+
+;       void OS_Tick_Handler (void);
+
+        PUBLIC  OS_Tick_Handler
+OS_Tick_Handler:
+
+        BL      os_tick_irqack
+        BL      rt_systick
+        B       Sys_Switch
+
+
+        END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_IAR/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M0/TOOLCHAIN_IAR/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,58 @@
+;/*----------------------------------------------------------------------------
+; *      CMSIS-RTOS  -  RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.70
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used
+; *    to endorse or promote products derived from this software without
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+                NAME    SVC_TABLE
+                SECTION .text:CONST (2)
+
+                PUBLIC  SVC_Count
+
+SVC_Cnt         EQU    (SVC_End-SVC_Table)/4
+SVC_Count       DCD     SVC_Cnt
+
+; Import user SVC functions here.
+;               IMPORT  __SVC_1
+
+                PUBLIC  SVC_Table
+SVC_Table
+; Insert user SVC functions here. SVC 0 used by RTL Kernel.
+;               DCD     __SVC_1                 ; user SVC function
+
+SVC_End
+
+                END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_ARM/HAL_CM0.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_ARM/HAL_CM0.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,301 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM0.C
+ *      Purpose: Hardware Abstraction Layer for Cortex-M0
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_HAL_CM.h"
+#include "rt_Task.h"
+#include "rt_MemBox.h"
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_set_PSP ------------------------------------*/
+
+__asm void rt_set_PSP (U32 stack) {
+        MSR     PSP,R0
+        BX      LR
+}
+
+
+/*--------------------------- rt_get_PSP ------------------------------------*/
+
+__asm U32 rt_get_PSP (void) {
+        MRS     R0,PSP
+        BX      LR
+}
+
+
+/*--------------------------- os_set_env ------------------------------------*/
+
+__asm void os_set_env (void) {
+   /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
+        MOV     R0,SP                   ; PSP = MSP
+        MSR     PSP,R0
+        LDR     R0,=__cpp(&os_flags)
+        LDRB    R0,[R0]
+        LSLS    R0,#31
+        BNE     PrivilegedE
+        MOVS    R0,#0x03                ; Unprivileged Thread mode, use PSP
+        MSR     CONTROL,R0
+        BX      LR
+PrivilegedE
+        MOVS    R0,#0x02                ; Privileged Thread mode, use PSP
+        MSR     CONTROL,R0
+        BX      LR
+
+        ALIGN
+}
+
+
+/*--------------------------- _alloc_box ------------------------------------*/
+
+__asm void *_alloc_box (void *box_mem) {
+   /* Function wrapper for Unprivileged/Privileged mode. */
+        LDR     R3,=__cpp(rt_alloc_box)
+        MOV     R12,R3
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BNE     PrivilegedA
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BEQ     PrivilegedA
+        SVC     0
+        BX      LR
+PrivilegedA
+        BX      R12
+
+        ALIGN
+}
+
+
+/*--------------------------- _free_box -------------------------------------*/
+
+__asm U32 _free_box (void *box_mem, void *box) {
+   /* Function wrapper for Unprivileged/Privileged mode. */
+        LDR     R3,=__cpp(rt_free_box)
+        MOV     R12,R3
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BNE     PrivilegedF
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BEQ     PrivilegedF
+        SVC     0
+        BX      LR
+PrivilegedF
+        BX      R12
+
+        ALIGN
+}
+
+
+/*-------------------------- SVC_Handler ------------------------------------*/
+
+__asm void SVC_Handler (void) {
+        PRESERVE8
+
+        IMPORT  SVC_Count
+        IMPORT  SVC_Table
+        IMPORT  rt_stk_check
+
+        MRS     R0,PSP                  ; Read PSP
+        LDR     R1,[R0,#24]             ; Read Saved PC from Stack
+        SUBS    R1,R1,#2                ; Point to SVC Instruction
+        LDRB    R1,[R1]                 ; Load SVC Number
+        CMP     R1,#0
+        BNE     SVC_User                ; User SVC Number > 0
+
+        MOV     LR,R4
+        LDMIA   R0,{R0-R3,R4}           ; Read R0-R3,R12 from stack
+        MOV     R12,R4
+        MOV     R4,LR
+        BLX     R12                     ; Call SVC Function
+
+        MRS     R3,PSP                  ; Read PSP
+        STMIA   R3!,{R0-R2}             ; Store return values
+
+        LDR     R3,=__cpp(&os_tsk)
+        LDMIA   R3!,{R1,R2}             ; os_tsk.run, os_tsk.new
+        CMP     R1,R2
+        BEQ     SVC_Exit                ; no task switch
+
+        SUBS    R3,#8
+        CMP     R1,#0                   ; Runtask deleted?
+        BEQ     SVC_Next
+
+        MRS     R0,PSP                  ; Read PSP
+        SUBS    R0,R0,#32               ; Adjust Start Address
+        STR     R0,[R1,#TCB_TSTACK]     ; Update os_tsk.run->tsk_stack
+        STMIA   R0!,{R4-R7}             ; Save old context (R4-R7)
+        MOV     R4,R8
+        MOV     R5,R9
+        MOV     R6,R10
+        MOV     R7,R11
+        STMIA   R0!,{R4-R7}             ; Save old context (R8-R11)
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            ; Check for Stack overflow
+        POP     {R2,R3}
+
+SVC_Next
+        STR     R2,[R3]                 ; os_tsk.run = os_tsk.new
+
+        LDR     R0,[R2,#TCB_TSTACK]     ; os_tsk.new->tsk_stack
+        ADDS    R0,R0,#16               ; Adjust Start Address
+        LDMIA   R0!,{R4-R7}             ; Restore new Context (R8-R11)
+        MOV     R8,R4
+        MOV     R9,R5
+        MOV     R10,R6
+        MOV     R11,R7
+        MSR     PSP,R0                  ; Write PSP
+        SUBS    R0,R0,#32               ; Adjust Start Address
+        LDMIA   R0!,{R4-R7}             ; Restore new Context (R4-R7)
+
+SVC_Exit
+        MOVS    R0,#:NOT:0xFFFFFFFD     ; Set EXC_RETURN value
+        MVNS    R0,R0
+        BX      R0                      ; RETI to Thread Mode, use PSP
+
+        /*------------------- User SVC ------------------------------*/
+
+SVC_User
+        PUSH    {R4,LR}                 ; Save Registers
+        LDR     R2,=SVC_Count
+        LDR     R2,[R2]
+        CMP     R1,R2
+        BHI     SVC_Done                ; Overflow
+
+        LDR     R4,=SVC_Table-4
+        LSLS    R1,R1,#2
+        LDR     R4,[R4,R1]              ; Load SVC Function Address
+        MOV     LR,R4
+
+        LDMIA   R0,{R0-R3,R4}           ; Read R0-R3,R12 from stack
+        MOV     R12,R4
+        BLX     LR                      ; Call SVC Function
+
+        MRS     R4,PSP                  ; Read PSP
+        STMIA   R4!,{R0-R3}             ; Function return values
+SVC_Done
+        POP     {R4,PC}                 ; RETI
+
+        ALIGN
+}
+
+
+/*-------------------------- PendSV_Handler ---------------------------------*/
+
+__asm void PendSV_Handler (void) {
+        PRESERVE8
+
+        BL      __cpp(rt_pop_req)
+
+Sys_Switch
+        LDR     R3,=__cpp(&os_tsk)
+        LDMIA   R3!,{R1,R2}             ; os_tsk.run, os_tsk.new
+        CMP     R1,R2
+        BEQ     Sys_Exit                ; no task switch
+
+        SUBS    R3,#8
+
+        MRS     R0,PSP                  ; Read PSP
+        SUBS    R0,R0,#32               ; Adjust Start Address
+        STR     R0,[R1,#TCB_TSTACK]     ; Update os_tsk.run->tsk_stack
+        STMIA   R0!,{R4-R7}             ; Save old context (R4-R7)
+        MOV     R4,R8
+        MOV     R5,R9
+        MOV     R6,R10
+        MOV     R7,R11
+        STMIA   R0!,{R4-R7}             ; Save old context (R8-R11)
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            ; Check for Stack overflow
+        POP     {R2,R3}
+
+        STR     R2,[R3]                 ; os_tsk.run = os_tsk.new
+
+        LDR     R0,[R2,#TCB_TSTACK]     ; os_tsk.new->tsk_stack
+        ADDS    R0,R0,#16               ; Adjust Start Address
+        LDMIA   R0!,{R4-R7}             ; Restore new Context (R8-R11)
+        MOV     R8,R4
+        MOV     R9,R5
+        MOV     R10,R6
+        MOV     R11,R7
+        MSR     PSP,R0                  ; Write PSP
+        SUBS    R0,R0,#32               ; Adjust Start Address
+        LDMIA   R0!,{R4-R7}             ; Restore new Context (R4-R7)
+
+Sys_Exit
+        MOVS    R0,#:NOT:0xFFFFFFFD     ; Set EXC_RETURN value
+        MVNS    R0,R0
+        BX      R0                      ; RETI to Thread Mode, use PSP
+
+        ALIGN
+}
+
+
+/*-------------------------- SysTick_Handler --------------------------------*/
+
+__asm void SysTick_Handler (void) {
+        PRESERVE8
+
+        BL      __cpp(rt_systick)
+        B       Sys_Switch
+
+        ALIGN
+}
+
+
+/*-------------------------- OS_Tick_Handler --------------------------------*/
+
+__asm void OS_Tick_Handler (void) {
+        PRESERVE8
+
+        BL      __cpp(os_tick_irqack)
+        BL      __cpp(rt_systick)
+        B       Sys_Switch
+
+        ALIGN
+}
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_ARM/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_ARM/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,57 @@
+;/*----------------------------------------------------------------------------
+; *      CMSIS-RTOS  -  RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.70
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2012 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used
+; *    to endorse or promote products derived from this software without
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+                AREA    SVC_TABLE, CODE, READONLY
+
+                EXPORT  SVC_Count
+
+SVC_Cnt         EQU    (SVC_End-SVC_Table)/4
+SVC_Count       DCD     SVC_Cnt
+
+; Import user SVC functions here.
+;               IMPORT  __SVC_1
+
+                EXPORT  SVC_Table
+SVC_Table
+; Insert user SVC functions here. SVC 0 used by RTL Kernel.
+;               DCD     __SVC_1                 ; user SVC function
+
+SVC_End
+
+                END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_GCC/HAL_CM0.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_GCC/HAL_CM0.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,370 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM0.S
+ *      Purpose: Hardware Abstraction Layer for Cortex-M0
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+        .file   "HAL_CM0.S"
+        .syntax unified
+
+        .equ    TCB_TSTACK, 44
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+        .thumb
+
+        .section ".text"
+        .align  2
+
+
+/*--------------------------- rt_set_PSP ------------------------------------*/
+
+#       void rt_set_PSP (U32 stack);
+
+        .thumb_func
+        .type   rt_set_PSP, %function
+        .global rt_set_PSP
+rt_set_PSP:
+        .fnstart
+        .cantunwind
+
+        MSR     PSP,R0
+        BX      LR
+
+        .fnend
+        .size   rt_set_PSP, .-rt_set_PSP
+
+
+/*--------------------------- rt_get_PSP ------------------------------------*/
+
+#       U32 rt_get_PSP (void);
+
+        .thumb_func
+        .type   rt_get_PSP, %function
+        .global rt_get_PSP
+rt_get_PSP:
+        .fnstart
+        .cantunwind
+
+        MRS     R0,PSP
+        BX      LR
+
+        .fnend
+        .size   rt_get_PSP, .-rt_get_PSP
+
+
+/*--------------------------- os_set_env ------------------------------------*/
+
+#       void os_set_env (void);
+        /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
+
+        .thumb_func
+        .type   os_set_env, %function
+        .global os_set_env
+os_set_env:
+        .fnstart
+        .cantunwind
+
+        MOV     R0,SP                   /* PSP = MSP */
+        MSR     PSP,R0
+        LDR     R0,=os_flags
+        LDRB    R0,[R0]
+        LSLS    R0,#31
+        BNE     PrivilegedE
+        MOVS    R0,#0x03                /* Unprivileged Thread mode, use PSP */
+        MSR     CONTROL,R0
+        BX      LR
+PrivilegedE:
+        MOVS    R0,#0x02                /* Privileged Thread mode, use PSP */
+        MSR     CONTROL,R0
+        BX      LR
+
+        .fnend
+        .size   os_set_env, .-os_set_env
+
+
+/*--------------------------- _alloc_box ------------------------------------*/
+
+#      void *_alloc_box (void *box_mem);
+       /* Function wrapper for Unprivileged/Privileged mode. */
+
+        .thumb_func
+        .type   _alloc_box, %function
+        .global _alloc_box
+_alloc_box:
+        .fnstart
+        .cantunwind
+
+        LDR     R3,=rt_alloc_box
+        MOV     R12,R3
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BNE     PrivilegedA
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BEQ     PrivilegedA
+        SVC     0
+        BX      LR
+PrivilegedA:
+        BX      R12
+
+        .fnend
+        .size   _alloc_box, .-_alloc_box
+
+
+/*--------------------------- _free_box -------------------------------------*/
+
+#       U32 _free_box (void *box_mem, void *box);
+        /* Function wrapper for Unprivileged/Privileged mode. */
+
+        .thumb_func
+        .type   _free_box, %function
+        .global _free_box
+_free_box:
+        .fnstart
+        .cantunwind
+
+        LDR     R3,=rt_free_box
+        MOV     R12,R3
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BNE     PrivilegedF
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BEQ     PrivilegedF
+        SVC     0
+        BX      LR
+PrivilegedF:
+        BX      R12
+
+        .fnend
+        .size   _free_box, .-_free_box
+
+
+/*-------------------------- SVC_Handler ------------------------------------*/
+
+#       void SVC_Handler (void);
+
+        .thumb_func
+        .type   SVC_Handler, %function
+        .global SVC_Handler
+SVC_Handler:
+        .fnstart
+        .cantunwind
+
+        MRS     R0,PSP                  /* Read PSP */
+        LDR     R1,[R0,#24]             /* Read Saved PC from Stack */
+        SUBS    R1,R1,#2                /* Point to SVC Instruction */
+        LDRB    R1,[R1]                 /* Load SVC Number */
+        CMP     R1,#0
+        BNE     SVC_User                /* User SVC Number > 0 */
+
+        MOV     LR,R4
+        LDMIA   R0,{R0-R3,R4}           /* Read R0-R3,R12 from stack */
+        MOV     R12,R4
+        MOV     R4,LR
+        BLX     R12                     /* Call SVC Function */
+
+        MRS     R3,PSP                  /* Read PSP */
+        STMIA   R3!,{R0-R2}             /* Store return values */
+
+        LDR     R3,=os_tsk
+        LDMIA   R3!,{R1,R2}             /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+        BEQ     SVC_Exit                /* no task switch */
+
+        SUBS    R3,#8
+        CMP     R1,#0                   /* Runtask deleted? */
+        BEQ     SVC_Next
+
+        MRS     R0,PSP                  /* Read PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        STR     R0,[R1,#TCB_TSTACK]     /* Update os_tsk.run->tsk_stack */
+        STMIA   R0!,{R4-R7}             /* Save old context (R4-R7) */
+        MOV     R4,R8
+        MOV     R5,R9
+        MOV     R6,R10
+        MOV     R7,R11
+        STMIA   R0!,{R4-R7}             /* Save old context (R8-R11) */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+SVC_Next:
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R0,[R2,#TCB_TSTACK]     /* os_tsk.new->tsk_stack */
+        ADDS    R0,R0,#16               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R8-R11) */
+        MOV     R8,R4
+        MOV     R9,R5
+        MOV     R10,R6
+        MOV     R11,R7
+        MSR     PSP,R0                  /* Write PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R4-R7) */
+
+SVC_Exit:
+        MOVS    R0,#~0xFFFFFFFD         /* Set EXC_RETURN value */
+        MVNS    R0,R0
+        BX      R0                      /* RETI to Thread Mode, use PSP */
+
+        /*------------------- User SVC ------------------------------*/
+
+SVC_User:
+        PUSH    {R4,LR}                 /* Save Registers */
+        LDR     R2,=SVC_Count
+        LDR     R2,[R2]
+        CMP     R1,R2
+        BHI     SVC_Done                /* Overflow */
+
+        LDR     R4,=SVC_Table-4
+        LSLS    R1,R1,#2
+        LDR     R4,[R4,R1]              /* Load SVC Function Address */
+        MOV     LR,R4
+
+        LDMIA   R0,{R0-R3,R4}           /* Read R0-R3,R12 from stack */
+        MOV     R12,R4
+        BLX     LR                      /* Call SVC Function */
+
+        MRS     R4,PSP                  /* Read PSP */
+        STMIA   R4!,{R0-R3}             /* Function return values */
+SVC_Done:
+        POP     {R4,PC}                 /* RETI */
+
+        .fnend
+        .size   SVC_Handler, .-SVC_Handler
+
+
+/*-------------------------- PendSV_Handler ---------------------------------*/
+
+#       void PendSV_Handler (void);
+
+        .thumb_func
+        .type   PendSV_Handler, %function
+        .global PendSV_Handler
+        .global Sys_Switch
+PendSV_Handler:
+        .fnstart
+        .cantunwind
+
+        BL      rt_pop_req
+
+Sys_Switch:
+        LDR     R3,=os_tsk
+        LDMIA   R3!,{R1,R2}             /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+        BEQ     Sys_Exit                /* no task switch */
+
+        SUBS    R3,#8
+
+        MRS     R0,PSP                  /* Read PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        STR     R0,[R1,#TCB_TSTACK]     /* Update os_tsk.run->tsk_stack */
+        STMIA   R0!,{R4-R7}             /* Save old context (R4-R7) */
+        MOV     R4,R8
+        MOV     R5,R9
+        MOV     R6,R10
+        MOV     R7,R11
+        STMIA   R0!,{R4-R7}             /* Save old context (R8-R11) */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R0,[R2,#TCB_TSTACK]     /* os_tsk.new->tsk_stack */
+        ADDS    R0,R0,#16               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R8-R11) */
+        MOV     R8,R4
+        MOV     R9,R5
+        MOV     R10,R6
+        MOV     R11,R7
+        MSR     PSP,R0                  /* Write PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R4-R7) */
+
+Sys_Exit:
+        MOVS    R0,#~0xFFFFFFFD         /* Set EXC_RETURN value */
+        MVNS    R0,R0
+        BX      R0                      /* RETI to Thread Mode, use PSP */
+
+        .fnend
+        .size   PendSV_Handler, .-PendSV_Handler
+
+
+/*-------------------------- SysTick_Handler --------------------------------*/
+
+#       void SysTick_Handler (void);
+
+        .thumb_func
+        .type   SysTick_Handler, %function
+        .global SysTick_Handler
+SysTick_Handler:
+        .fnstart
+        .cantunwind
+
+        BL      rt_systick
+        B       Sys_Switch
+
+        .fnend
+        .size   SysTick_Handler, .-SysTick_Handler
+
+
+/*-------------------------- OS_Tick_Handler --------------------------------*/
+
+#       void OS_Tick_Handler (void);
+
+        .thumb_func
+        .type   OS_Tick_Handler, %function
+        .global OS_Tick_Handler
+OS_Tick_Handler:
+        .fnstart
+        .cantunwind
+
+        BL      os_tick_irqack
+        BL      rt_systick
+        B       Sys_Switch
+
+        .fnend
+        .size   OS_Tick_Handler, .-OS_Tick_Handler
+
+
+        .end
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_GCC/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_GCC/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,56 @@
+;/*----------------------------------------------------------------------------
+; *      CMSIS-RTOS - RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.70
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used
+; *    to endorse or promote products derived from this software without
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+        .file   "SVC_Table.S"
+
+
+        .section ".svc_table"
+
+        .global  SVC_Table
+SVC_Table:
+/* Insert user SVC functions here. SVC 0 used by RTL Kernel. */
+#       .long   __SVC_1                 /* user SVC function */
+SVC_End:
+
+        .global  SVC_Count
+SVC_Count:
+        .long   (SVC_End-SVC_Table)/4
+
+
+        .end
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_IAR/HAL_CM0.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_IAR/HAL_CM0.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,312 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM0.S
+ *      Purpose: Hardware Abstraction Layer for Cortex-M0
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+        NAME    HAL_CM0.S
+
+        #define TCB_TSTACK 44
+
+        EXTERN  os_flags
+        EXTERN  os_tsk
+        EXTERN  rt_alloc_box
+        EXTERN  rt_free_box
+        EXTERN  rt_stk_check
+        EXTERN  rt_pop_req
+        EXTERN  rt_systick
+        EXTERN  os_tick_irqack
+        EXTERN  SVC_Table
+        EXTERN  SVC_Count
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+        SECTION .text:CODE:NOROOT(2)
+        THUMB
+
+/*--------------------------- rt_set_PSP ------------------------------------*/
+
+;       void rt_set_PSP (U32 stack);
+
+        PUBLIC  rt_set_PSP
+rt_set_PSP:
+
+        MSR     PSP,R0
+        BX      LR
+
+
+/*--------------------------- rt_get_PSP ------------------------------------*/
+
+;       U32 rt_get_PSP (void);
+
+        PUBLIC  rt_get_PSP
+rt_get_PSP:
+
+        MRS     R0,PSP
+        BX      LR
+
+
+/*--------------------------- os_set_env ------------------------------------*/
+
+;       void os_set_env (void);
+        /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
+
+        PUBLIC  os_set_env
+os_set_env:
+
+        MOV     R0,SP                   /* PSP = MSP */
+        MSR     PSP,R0
+        LDR     R0,=os_flags
+        LDRB    R0,[R0]
+        LSLS    R0,#31
+        BNE     PrivilegedE
+        MOVS    R0,#0x03                /* Unprivileged Thread mode, use PSP */
+        MSR     CONTROL,R0
+        BX      LR
+PrivilegedE:
+        MOVS    R0,#0x02                /* Privileged Thread mode, use PSP */
+        MSR     CONTROL,R0
+        BX      LR
+
+
+/*--------------------------- _alloc_box ------------------------------------*/
+
+;      void *_alloc_box (void *box_mem);
+       /* Function wrapper for Unprivileged/Privileged mode. */
+
+        PUBLIC  _alloc_box
+_alloc_box:
+
+        LDR     R3,=rt_alloc_box
+        MOV     R12,R3
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BNE     PrivilegedA
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BEQ     PrivilegedA
+        SVC     0
+        BX      LR
+PrivilegedA:
+        BX      R12
+
+
+/*--------------------------- _free_box -------------------------------------*/
+
+;       U32 _free_box (void *box_mem, void *box);
+        /* Function wrapper for Unprivileged/Privileged mode. */
+
+        PUBLIC  _free_box
+_free_box:
+
+        LDR     R3,=rt_free_box
+        MOV     R12,R3
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BNE     PrivilegedF
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BEQ     PrivilegedF
+        SVC     0
+        BX      LR
+PrivilegedF:
+        BX      R12
+
+
+/*-------------------------- SVC_Handler ------------------------------------*/
+
+;       void SVC_Handler (void);
+
+        PUBLIC  SVC_Handler
+SVC_Handler:
+
+        MRS     R0,PSP                  /* Read PSP */
+        LDR     R1,[R0,#24]             /* Read Saved PC from Stack */
+        SUBS    R1,R1,#2                /* Point to SVC Instruction */
+        LDRB    R1,[R1]                 /* Load SVC Number */
+        CMP     R1,#0
+        BNE     SVC_User                /* User SVC Number > 0 */
+
+        MOV     LR,R4
+        LDMIA   R0,{R0-R3,R4}           /* Read R0-R3,R12 from stack */
+        MOV     R12,R4
+        MOV     R4,LR
+        BLX     R12                     /* Call SVC Function */
+
+        MRS     R3,PSP                  /* Read PSP */
+        STMIA   R3!,{R0-R2}             /* Store return values */
+
+        LDR     R3,=os_tsk
+        LDMIA   R3!,{R1,R2}             /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+        BEQ     SVC_Exit                /* no task switch */
+
+        SUBS    R3,#8
+        CMP     R1,#0                   /* Runtask deleted? */
+        BEQ     SVC_Next
+
+        MRS     R0,PSP                  /* Read PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        STR     R0,[R1,#TCB_TSTACK]     /* Update os_tsk.run->tsk_stack */
+        STMIA   R0!,{R4-R7}             /* Save old context (R4-R7) */
+        MOV     R4,R8
+        MOV     R5,R9
+        MOV     R6,R10
+        MOV     R7,R11
+        STMIA   R0!,{R4-R7}             /* Save old context (R8-R11) */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+SVC_Next:
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R0,[R2,#TCB_TSTACK]     /* os_tsk.new->tsk_stack */
+        ADDS    R0,R0,#16               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R8-R11) */
+        MOV     R8,R4
+        MOV     R9,R5
+        MOV     R10,R6
+        MOV     R11,R7
+        MSR     PSP,R0                  /* Write PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R4-R7) */
+
+SVC_Exit:
+        MOVS    R0,#~0xFFFFFFFD         /* Set EXC_RETURN value */
+        MVNS    R0,R0
+        BX      R0                      /* RETI to Thread Mode, use PSP */
+
+        /*------------------- User SVC ------------------------------*/
+
+SVC_User:
+        PUSH    {R4,LR}                 /* Save Registers */
+        LDR     R2,=SVC_Count
+        LDR     R2,[R2]
+        CMP     R1,R2
+        BHI     SVC_Done                /* Overflow */
+
+        LDR     R4,=SVC_Table-4
+        LSLS    R1,R1,#2
+        LDR     R4,[R4,R1]              /* Load SVC Function Address */
+        MOV     LR,R4
+
+        LDMIA   R0,{R0-R3,R4}           /* Read R0-R3,R12 from stack */
+        MOV     R12,R4
+        BLX     LR                      /* Call SVC Function */
+
+        MRS     R4,PSP                  /* Read PSP */
+        STMIA   R4!,{R0-R3}             /* Function return values */
+SVC_Done:
+        POP     {R4,PC}                 /* RETI */
+
+
+/*-------------------------- PendSV_Handler ---------------------------------*/
+
+;       void PendSV_Handler (void);
+
+        PUBLIC  PendSV_Handler
+PendSV_Handler:
+
+        BL      rt_pop_req
+
+Sys_Switch:
+        LDR     R3,=os_tsk
+        LDMIA   R3!,{R1,R2}             /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+        BEQ     Sys_Exit                /* no task switch */
+
+        SUBS    R3,#8
+
+        MRS     R0,PSP                  /* Read PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        STR     R0,[R1,#TCB_TSTACK]     /* Update os_tsk.run->tsk_stack */
+        STMIA   R0!,{R4-R7}             /* Save old context (R4-R7) */
+        MOV     R4,R8
+        MOV     R5,R9
+        MOV     R6,R10
+        MOV     R7,R11
+        STMIA   R0!,{R4-R7}             /* Save old context (R8-R11) */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R0,[R2,#TCB_TSTACK]     /* os_tsk.new->tsk_stack */
+        ADDS    R0,R0,#16               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R8-R11) */
+        MOV     R8,R4
+        MOV     R9,R5
+        MOV     R10,R6
+        MOV     R11,R7
+        MSR     PSP,R0                  /* Write PSP */
+        SUBS    R0,R0,#32               /* Adjust Start Address */
+        LDMIA   R0!,{R4-R7}             /* Restore new Context (R4-R7) */
+
+Sys_Exit:
+        MOVS    R0,#~0xFFFFFFFD         /* Set EXC_RETURN value */
+        MVNS    R0,R0
+        BX      R0                      /* RETI to Thread Mode, use PSP */
+
+
+/*-------------------------- SysTick_Handler --------------------------------*/
+
+;       void SysTick_Handler (void);
+
+        PUBLIC  SysTick_Handler
+SysTick_Handler:
+
+        BL      rt_systick
+        B       Sys_Switch
+
+
+/*-------------------------- OS_Tick_Handler --------------------------------*/
+
+;       void OS_Tick_Handler (void);
+
+        PUBLIC  OS_Tick_Handler
+OS_Tick_Handler:
+
+        BL      os_tick_irqack
+        BL      rt_systick
+        B       Sys_Switch
+
+
+        END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_IAR/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M0P/TOOLCHAIN_IAR/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,58 @@
+;/*----------------------------------------------------------------------------
+; *      CMSIS-RTOS  -  RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.70
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used
+; *    to endorse or promote products derived from this software without
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+                NAME    SVC_TABLE
+                SECTION .text:CONST (2)
+
+                PUBLIC  SVC_Count
+
+SVC_Cnt         EQU    (SVC_End-SVC_Table)/4
+SVC_Count       DCD     SVC_Cnt
+
+; Import user SVC functions here.
+;               IMPORT  __SVC_1
+
+                PUBLIC  SVC_Table
+SVC_Table
+; Insert user SVC functions here. SVC 0 used by RTL Kernel.
+;               DCD     __SVC_1                 ; user SVC function
+
+SVC_End
+
+                END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_ARM/HAL_CM3.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_ARM/HAL_CM3.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,274 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM3.C
+ *      Purpose: Hardware Abstraction Layer for Cortex-M3
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_HAL_CM.h"
+#include "rt_Task.h"
+#include "rt_MemBox.h"
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_set_PSP ------------------------------------*/
+
+__asm void rt_set_PSP (U32 stack) {
+        MSR     PSP,R0
+        BX      LR
+}
+
+
+/*--------------------------- rt_get_PSP ------------------------------------*/
+
+__asm U32 rt_get_PSP (void) {
+        MRS     R0,PSP
+        BX      LR
+}
+
+
+/*--------------------------- os_set_env ------------------------------------*/
+
+__asm void os_set_env (void) {
+   /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
+        MOV     R0,SP                   ; PSP = MSP
+        MSR     PSP,R0
+        LDR     R0,=__cpp(&os_flags)
+        LDRB    R0,[R0]
+        LSLS    R0,#31
+        MOVNE   R0,#0x02                ; Privileged Thread mode, use PSP
+        MOVEQ   R0,#0x03                ; Unprivileged Thread mode, use PSP
+        MSR     CONTROL,R0
+        BX      LR
+
+        ALIGN
+}
+
+
+/*--------------------------- _alloc_box ------------------------------------*/
+
+__asm void *_alloc_box (void *box_mem) {
+   /* Function wrapper for Unprivileged/Privileged mode. */
+        LDR     R12,=__cpp(rt_alloc_box)
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BXNE    R12
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BXEQ    R12
+        SVC     0
+        BX      LR
+
+        ALIGN
+}
+
+
+/*--------------------------- _free_box -------------------------------------*/
+
+__asm U32 _free_box (void *box_mem, void *box) {
+   /* Function wrapper for Unprivileged/Privileged mode. */
+        LDR     R12,=__cpp(rt_free_box)
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BXNE    R12
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BXEQ    R12
+        SVC     0
+        BX      LR
+
+        ALIGN
+}
+
+
+/*-------------------------- SVC_Handler ------------------------------------*/
+
+__asm void SVC_Handler (void) {
+        PRESERVE8
+
+        IMPORT  SVC_Count
+        IMPORT  SVC_Table
+        IMPORT  rt_stk_check
+
+#ifdef  IFX_XMC4XXX
+        EXPORT  SVC_Handler_Veneer
+SVC_Handler_Veneer        
+#endif
+
+        MRS     R0,PSP                  ; Read PSP
+        LDR     R1,[R0,#24]             ; Read Saved PC from Stack
+        LDRB    R1,[R1,#-2]             ; Load SVC Number
+        CBNZ    R1,SVC_User
+
+        LDM     R0,{R0-R3,R12}          ; Read R0-R3,R12 from stack
+        BLX     R12                     ; Call SVC Function
+
+        MRS     R12,PSP                 ; Read PSP
+        STM     R12,{R0-R2}             ; Store return values
+
+        LDR     R3,=__cpp(&os_tsk)
+        LDM     R3,{R1,R2}              ; os_tsk.run, os_tsk.new
+        CMP     R1,R2
+        BEQ     SVC_Exit                ; no task switch
+
+        CBZ     R1,SVC_Next             ; Runtask deleted?
+        STMDB   R12!,{R4-R11}           ; Save Old context
+        STR     R12,[R1,#TCB_TSTACK]    ; Update os_tsk.run->tsk_stack
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            ; Check for Stack overflow
+        POP     {R2,R3}
+
+SVC_Next
+        STR     R2,[R3]                 ; os_tsk.run = os_tsk.new
+
+        LDR     R12,[R2,#TCB_TSTACK]    ; os_tsk.new->tsk_stack
+        LDMIA   R12!,{R4-R11}           ; Restore New Context
+        MSR     PSP,R12                 ; Write PSP
+
+SVC_Exit
+        MVN     LR,#:NOT:0xFFFFFFFD     ; set EXC_RETURN value
+#ifdef  IFX_XMC4XXX
+        PUSH    {LR}
+        POP     {PC}
+#else
+        BX      LR
+#endif
+
+        /*------------------- User SVC ------------------------------*/
+
+SVC_User
+        PUSH    {R4,LR}                 ; Save Registers
+        LDR     R2,=SVC_Count
+        LDR     R2,[R2]
+        CMP     R1,R2
+        BHI     SVC_Done                ; Overflow
+
+        LDR     R4,=SVC_Table-4
+        LDR     R4,[R4,R1,LSL #2]       ; Load SVC Function Address
+
+        LDM     R0,{R0-R3,R12}          ; Read R0-R3,R12 from stack
+        BLX     R4                      ; Call SVC Function
+
+        MRS     R12,PSP
+        STM     R12,{R0-R3}             ; Function return values
+SVC_Done
+        POP     {R4,PC}                 ; RETI
+
+        ALIGN
+}
+
+
+/*-------------------------- PendSV_Handler ---------------------------------*/
+
+__asm void PendSV_Handler (void) {
+        PRESERVE8
+
+#ifdef  IFX_XMC4XXX
+        EXPORT  PendSV_Handler_Veneer
+PendSV_Handler_Veneer        
+#endif
+
+        BL      __cpp(rt_pop_req)
+
+Sys_Switch
+        LDR     R3,=__cpp(&os_tsk)
+        LDM     R3,{R1,R2}              ; os_tsk.run, os_tsk.new
+        CMP     R1,R2
+        BEQ     Sys_Exit
+
+        MRS     R12,PSP                 ; Read PSP
+        STMDB   R12!,{R4-R11}           ; Save Old context
+        STR     R12,[R1,#TCB_TSTACK]    ; Update os_tsk.run->tsk_stack
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            ; Check for Stack overflow
+        POP     {R2,R3}
+
+        STR     R2,[R3]                 ; os_tsk.run = os_tsk.new
+
+        LDR     R12,[R2,#TCB_TSTACK]    ; os_tsk.new->tsk_stack
+        LDMIA   R12!,{R4-R11}           ; Restore New Context
+        MSR     PSP,R12                 ; Write PSP
+
+Sys_Exit
+        MVN     LR,#:NOT:0xFFFFFFFD     ; set EXC_RETURN value
+#ifdef  IFX_XMC4XXX
+        PUSH    {LR}
+        POP     {PC}
+#else
+        BX      LR                      ; Return to Thread Mode
+#endif
+
+        ALIGN
+}
+
+
+/*-------------------------- SysTick_Handler --------------------------------*/
+
+__asm void SysTick_Handler (void) {
+        PRESERVE8
+
+#ifdef  IFX_XMC4XXX
+        EXPORT  SysTick_Handler_Veneer
+SysTick_Handler_Veneer        
+#endif
+
+        BL      __cpp(rt_systick)
+        B       Sys_Switch
+
+        ALIGN
+}
+
+
+/*-------------------------- OS_Tick_Handler --------------------------------*/
+
+__asm void OS_Tick_Handler (void) {
+        PRESERVE8
+
+        BL      __cpp(os_tick_irqack)
+        BL      __cpp(rt_systick)
+        B       Sys_Switch
+
+        ALIGN
+}
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_ARM/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_ARM/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,57 @@
+;/*----------------------------------------------------------------------------
+; *      CMSIS-RTOS  -  RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.70
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used
+; *    to endorse or promote products derived from this software without
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+                AREA    SVC_TABLE, CODE, READONLY
+
+                EXPORT  SVC_Count
+
+SVC_Cnt         EQU    (SVC_End-SVC_Table)/4
+SVC_Count       DCD     SVC_Cnt
+
+; Import user SVC functions here.
+;               IMPORT  __SVC_1
+
+                EXPORT  SVC_Table
+SVC_Table
+; Insert user SVC functions here. SVC 0 used by RTL Kernel.
+;               DCD     __SVC_1                 ; user SVC function
+
+SVC_End
+
+                END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_GCC/HAL_CM3.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_GCC/HAL_CM3.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,345 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM3.S
+ *      Purpose: Hardware Abstraction Layer for Cortex-M3
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+        .file   "HAL_CM3.S"
+        .syntax unified
+
+        .equ    TCB_TSTACK, 44
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+        .thumb
+
+        .section ".text"
+        .align  2
+
+
+/*--------------------------- rt_set_PSP ------------------------------------*/
+
+#       void rt_set_PSP (U32 stack);
+
+        .thumb_func
+        .type   rt_set_PSP, %function
+        .global rt_set_PSP
+rt_set_PSP:
+        .fnstart
+        .cantunwind
+
+        MSR     PSP,R0
+        BX      LR
+
+        .fnend
+        .size   rt_set_PSP, .-rt_set_PSP
+
+
+/*--------------------------- rt_get_PSP ------------------------------------*/
+
+#       U32 rt_get_PSP (void);
+
+        .thumb_func
+        .type   rt_get_PSP, %function
+        .global rt_get_PSP
+rt_get_PSP:
+        .fnstart
+        .cantunwind
+
+        MRS     R0,PSP
+        BX      LR
+
+        .fnend
+        .size   rt_get_PSP, .-rt_get_PSP
+
+
+/*--------------------------- os_set_env ------------------------------------*/
+
+#       void os_set_env (void);
+        /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
+
+        .thumb_func
+        .type   os_set_env, %function
+        .global os_set_env
+os_set_env:
+        .fnstart
+        .cantunwind
+
+        MOV     R0,SP                   /* PSP = MSP */
+        MSR     PSP,R0
+        LDR     R0,=os_flags
+        LDRB    R0,[R0]
+        LSLS    R0,#31
+        ITE     NE
+        MOVNE   R0,#0x02                /* Privileged Thread mode, use PSP */
+        MOVEQ   R0,#0x03                /* Unprivileged Thread mode, use PSP */
+        MSR     CONTROL,R0
+        BX      LR
+
+        .fnend
+        .size   os_set_env, .-os_set_env
+
+
+/*--------------------------- _alloc_box ------------------------------------*/
+
+#      void *_alloc_box (void *box_mem);
+       /* Function wrapper for Unprivileged/Privileged mode. */
+
+        .thumb_func
+        .type   _alloc_box, %function
+        .global _alloc_box
+_alloc_box:
+        .fnstart
+        .cantunwind
+
+        LDR     R12,=rt_alloc_box
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        IT      NE
+        BXNE    R12
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        IT      EQ
+        BXEQ    R12
+        SVC     0
+        BX      LR
+
+        .fnend
+        .size   _alloc_box, .-_alloc_box
+
+
+/*--------------------------- _free_box -------------------------------------*/
+
+#       U32 _free_box (void *box_mem, void *box);
+        /* Function wrapper for Unprivileged/Privileged mode. */
+
+        .thumb_func
+        .type   _free_box, %function
+        .global _free_box
+_free_box:
+        .fnstart
+        .cantunwind
+
+        LDR     R12,=rt_free_box
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        IT      NE
+        BXNE    R12
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        IT      EQ
+        BXEQ    R12
+        SVC     0
+        BX      LR
+
+        .fnend
+        .size   _free_box, .-_free_box
+
+
+/*-------------------------- SVC_Handler ------------------------------------*/
+
+#       void SVC_Handler (void);
+
+        .thumb_func
+        .type   SVC_Handler, %function
+        .global SVC_Handler
+SVC_Handler:
+        .ifdef  IFX_XMC4XXX
+        .global SVC_Handler_Veneer
+SVC_Handler_Veneer:
+        .endif
+        .fnstart
+        .cantunwind
+
+        MRS     R0,PSP                  /* Read PSP */
+        LDR     R1,[R0,#24]             /* Read Saved PC from Stack */
+        LDRB    R1,[R1,#-2]             /* Load SVC Number */
+        CBNZ    R1,SVC_User
+
+        LDM     R0,{R0-R3,R12}          /* Read R0-R3,R12 from stack */
+        BLX     R12                     /* Call SVC Function */
+
+        MRS     R12,PSP                 /* Read PSP */
+        STM     R12,{R0-R2}             /* Store return values */
+
+        LDR     R3,=os_tsk
+        LDM     R3,{R1,R2}              /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+        BEQ     SVC_Exit                /* no task switch */
+
+        CBZ     R1,SVC_Next             /* Runtask deleted? */
+        STMDB   R12!,{R4-R11}           /* Save Old context */
+        STR     R12,[R1,#TCB_TSTACK]    /* Update os_tsk.run->tsk_stack */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+SVC_Next:
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R12,[R2,#TCB_TSTACK]    /* os_tsk.new->tsk_stack */
+        LDMIA   R12!,{R4-R11}           /* Restore New Context */
+        MSR     PSP,R12                 /* Write PSP */
+
+SVC_Exit:
+        MVN     LR,#~0xFFFFFFFD         /* set EXC_RETURN value */
+        .ifdef  IFX_XMC4XXX
+        PUSH    {LR}
+        POP     {PC}
+        .else
+        BX      LR
+        .endif
+
+        /*------------------- User SVC ------------------------------*/
+
+SVC_User:
+        PUSH    {R4,LR}                 /* Save Registers */
+        LDR     R2,=SVC_Count
+        LDR     R2,[R2]
+        CMP     R1,R2
+        BHI     SVC_Done                /* Overflow */
+
+        LDR     R4,=SVC_Table-4
+        LDR     R4,[R4,R1,LSL #2]       /* Load SVC Function Address */
+
+        LDM     R0,{R0-R3,R12}          /* Read R0-R3,R12 from stack */
+        BLX     R4                      /* Call SVC Function */
+
+        MRS     R12,PSP
+        STM     R12,{R0-R3}             /* Function return values */
+SVC_Done:
+        POP     {R4,PC}                 /* RETI */
+
+        .fnend
+        .size   SVC_Handler, .-SVC_Handler
+
+
+/*-------------------------- PendSV_Handler ---------------------------------*/
+
+#       void PendSV_Handler (void);
+
+        .thumb_func
+        .type   PendSV_Handler, %function
+        .global PendSV_Handler
+        .global Sys_Switch
+PendSV_Handler:
+        .ifdef  IFX_XMC4XXX
+        .global PendSV_Handler_Veneer
+PendSV_Handler_Veneer:
+        .endif
+        .fnstart
+        .cantunwind
+
+        BL      rt_pop_req
+
+Sys_Switch:
+        LDR     R3,=os_tsk
+        LDM     R3,{R1,R2}              /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+        BEQ     Sys_Exit
+
+        MRS     R12,PSP                 /* Read PSP */
+        STMDB   R12!,{R4-R11}           /* Save Old context */
+        STR     R12,[R1,#TCB_TSTACK]    /* Update os_tsk.run->tsk_stack */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R12,[R2,#TCB_TSTACK]    /* os_tsk.new->tsk_stack */
+        LDMIA   R12!,{R4-R11}           /* Restore New Context */
+        MSR     PSP,R12                 /* Write PSP */
+
+Sys_Exit:
+        MVN     LR,#~0xFFFFFFFD         /* set EXC_RETURN value */
+        .ifdef  IFX_XMC4XXX
+        PUSH    {LR}
+        POP     {PC}
+        .else
+        BX      LR                      /* Return to Thread Mode */
+        .endif
+
+        .fnend
+        .size   PendSV_Handler, .-PendSV_Handler
+
+
+/*-------------------------- SysTick_Handler --------------------------------*/
+
+#       void SysTick_Handler (void);
+
+        .thumb_func
+        .type   SysTick_Handler, %function
+        .global SysTick_Handler
+SysTick_Handler:
+        .ifdef  IFX_XMC4XXX
+        .global SysTick_Handler_Veneer
+SysTick_Handler_Veneer:
+        .endif
+        .fnstart
+        .cantunwind
+
+        BL      rt_systick
+        B       Sys_Switch
+
+        .fnend
+        .size   SysTick_Handler, .-SysTick_Handler
+
+
+/*-------------------------- OS_Tick_Handler --------------------------------*/
+
+#       void OS_Tick_Handler (void);
+
+        .thumb_func
+        .type   OS_Tick_Handler, %function
+        .global OS_Tick_Handler
+OS_Tick_Handler:
+        .fnstart
+        .cantunwind
+
+        BL      os_tick_irqack
+        BL      rt_systick
+        B       Sys_Switch
+
+        .fnend
+        .size   OS_Tick_Handler, .-OS_Tick_Handler
+
+
+        .end
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_GCC/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_GCC/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,56 @@
+;/*----------------------------------------------------------------------------
+; *      CMSIS-RTOS - RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.70
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used
+; *    to endorse or promote products derived from this software without
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+        .file   "SVC_Table.S"
+
+
+        .section ".svc_table"
+
+        .global  SVC_Table
+SVC_Table:
+/* Insert user SVC functions here. SVC 0 used by RTL Kernel. */
+#       .long   __SVC_1                 /* user SVC function */
+SVC_End:
+
+        .global  SVC_Count
+SVC_Count:
+        .long   (SVC_End-SVC_Table)/4
+
+
+        .end
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_IAR/HAL_CM3.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_IAR/HAL_CM3.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,265 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM3.S
+ *      Purpose: Hardware Abstraction Layer for Cortex-M3
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+        NAME    HAL_CM3.S
+
+        #define TCB_TSTACK 44
+
+        EXTERN  os_flags
+        EXTERN  os_tsk
+        EXTERN  rt_alloc_box
+        EXTERN  rt_free_box
+        EXTERN  rt_stk_check
+        EXTERN  rt_pop_req
+        EXTERN  rt_systick
+        EXTERN  os_tick_irqack
+        EXTERN  SVC_Table
+        EXTERN  SVC_Count
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+        SECTION .text:CODE:NOROOT(2)
+        THUMB
+
+/*--------------------------- rt_set_PSP ------------------------------------*/
+
+;       void rt_set_PSP (U32 stack);
+
+        PUBLIC  rt_set_PSP
+rt_set_PSP:
+
+        MSR     PSP,R0
+        BX      LR
+
+
+/*--------------------------- rt_get_PSP ------------------------------------*/
+
+;       U32 rt_get_PSP (void);
+
+        PUBLIC  rt_get_PSP
+rt_get_PSP:
+
+        MRS     R0,PSP
+        BX      LR
+
+
+/*--------------------------- os_set_env ------------------------------------*/
+
+;       void os_set_env (void);
+        /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
+
+        PUBLIC  os_set_env
+os_set_env:
+
+        MOV     R0,SP                   /* PSP = MSP */
+        MSR     PSP,R0
+        LDR     R0,=os_flags
+        LDRB    R0,[R0]
+        LSLS    R0,#31
+        ITE     NE
+        MOVNE   R0,#0x02                /* Privileged Thread mode, use PSP */
+        MOVEQ   R0,#0x03                /* Unprivileged Thread mode, use PSP */
+        MSR     CONTROL,R0
+        BX      LR
+
+
+/*--------------------------- _alloc_box ------------------------------------*/
+
+;      void *_alloc_box (void *box_mem);
+       /* Function wrapper for Unprivileged/Privileged mode. */
+
+        PUBLIC  _alloc_box
+_alloc_box:
+
+        LDR     R12,=rt_alloc_box
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        IT      NE
+        BXNE    R12
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        IT      EQ
+        BXEQ    R12
+        SVC     0
+        BX      LR
+
+
+/*--------------------------- _free_box -------------------------------------*/
+
+;       U32 _free_box (void *box_mem, void *box);
+        /* Function wrapper for Unprivileged/Privileged mode. */
+
+        PUBLIC  _free_box
+_free_box:
+
+        LDR     R12,=rt_free_box
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        IT      NE
+        BXNE    R12
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        IT      EQ
+        BXEQ    R12
+        SVC     0
+        BX      LR
+
+
+/*-------------------------- SVC_Handler ------------------------------------*/
+
+;       void SVC_Handler (void);
+
+        PUBLIC  SVC_Handler
+SVC_Handler:
+
+        MRS     R0,PSP                  /* Read PSP */
+        LDR     R1,[R0,#24]             /* Read Saved PC from Stack */
+        LDRB    R1,[R1,#-2]             /* Load SVC Number */
+        CBNZ    R1,SVC_User
+
+        LDM     R0,{R0-R3,R12}          /* Read R0-R3,R12 from stack */
+        BLX     R12                     /* Call SVC Function */
+
+        MRS     R12,PSP                 /* Read PSP */
+        STM     R12,{R0-R2}             /* Store return values */
+
+        LDR     R3,=os_tsk
+        LDM     R3,{R1,R2}              /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+        BEQ     SVC_Exit                /* no task switch */
+
+        CBZ     R1,SVC_Next             /* Runtask deleted? */
+        STMDB   R12!,{R4-R11}           /* Save Old context */
+        STR     R12,[R1,#TCB_TSTACK]    /* Update os_tsk.run->tsk_stack */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+SVC_Next:
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R12,[R2,#TCB_TSTACK]    /* os_tsk.new->tsk_stack */
+        LDMIA   R12!,{R4-R11}           /* Restore New Context */
+        MSR     PSP,R12                 /* Write PSP */
+
+SVC_Exit:
+        MVN     LR,#~0xFFFFFFFD         /* set EXC_RETURN value */
+        BX      LR
+
+        /*------------------- User SVC ------------------------------*/
+
+SVC_User:
+        PUSH    {R4,LR}                 /* Save Registers */
+        LDR     R2,=SVC_Count
+        LDR     R2,[R2]
+        CMP     R1,R2
+        BHI     SVC_Done                /* Overflow */
+
+        LDR     R4,=SVC_Table-4
+        LDR     R4,[R4,R1,LSL #2]       /* Load SVC Function Address */
+
+        LDM     R0,{R0-R3,R12}          /* Read R0-R3,R12 from stack */
+        BLX     R4                      /* Call SVC Function */
+
+        MRS     R12,PSP
+        STM     R12,{R0-R3}             /* Function return values */
+SVC_Done:
+        POP     {R4,PC}                 /* RETI */
+
+
+/*-------------------------- PendSV_Handler ---------------------------------*/
+
+;       void PendSV_Handler (void);
+
+        PUBLIC  PendSV_Handler
+PendSV_Handler:
+
+        BL      rt_pop_req
+
+Sys_Switch:
+        LDR     R3,=os_tsk
+        LDM     R3,{R1,R2}              /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+        BEQ     Sys_Exit
+
+        MRS     R12,PSP                 /* Read PSP */
+        STMDB   R12!,{R4-R11}           /* Save Old context */
+        STR     R12,[R1,#TCB_TSTACK]    /* Update os_tsk.run->tsk_stack */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R12,[R2,#TCB_TSTACK]    /* os_tsk.new->tsk_stack */
+        LDMIA   R12!,{R4-R11}           /* Restore New Context */
+        MSR     PSP,R12                 /* Write PSP */
+
+Sys_Exit:
+        MVN     LR,#~0xFFFFFFFD         /* set EXC_RETURN value */
+        BX      LR                      /* Return to Thread Mode */
+
+
+/*-------------------------- SysTick_Handler --------------------------------*/
+
+;       void SysTick_Handler (void);
+
+        PUBLIC  SysTick_Handler
+SysTick_Handler:
+
+        BL      rt_systick
+        B       Sys_Switch
+
+
+/*-------------------------- OS_Tick_Handler --------------------------------*/
+
+;       void OS_Tick_Handler (void);
+
+        PUBLIC  OS_Tick_Handler
+OS_Tick_Handler:
+
+        BL      os_tick_irqack
+        BL      rt_systick
+        B       Sys_Switch
+
+
+        END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_IAR/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_M3/TOOLCHAIN_IAR/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,58 @@
+;/*----------------------------------------------------------------------------
+; *      CMSIS-RTOS  -  RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.70
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used
+; *    to endorse or promote products derived from this software without
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+                NAME    SVC_TABLE
+                SECTION .text:CONST (2)
+
+                PUBLIC  SVC_Count
+
+SVC_Cnt         EQU    (SVC_End-SVC_Table)/4
+SVC_Count       DCD     SVC_Cnt
+
+; Import user SVC functions here.
+;               IMPORT  __SVC_1
+
+                PUBLIC  SVC_Table
+SVC_Table
+; Insert user SVC functions here. SVC 0 used by RTL Kernel.
+;               DCD     __SVC_1                 ; user SVC function
+
+SVC_End
+
+                END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_ARM/HAL_CM4.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_ARM/HAL_CM4.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,327 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM4.C
+ *      Purpose: Hardware Abstraction Layer for Cortex-M4
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_HAL_CM.h"
+#include "rt_Task.h"
+#include "rt_MemBox.h"
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_set_PSP ------------------------------------*/
+
+__asm void rt_set_PSP (U32 stack) {
+        MSR     PSP,R0
+        BX      LR
+}
+
+
+/*--------------------------- rt_get_PSP ------------------------------------*/
+
+__asm U32 rt_get_PSP (void) {
+        MRS     R0,PSP
+        BX      LR
+}
+
+
+/*--------------------------- os_set_env ------------------------------------*/
+
+__asm void os_set_env (void) {
+   /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
+        MOV     R0,SP                   ; PSP = MSP
+        MSR     PSP,R0
+        LDR     R0,=__cpp(&os_flags)
+        LDRB    R0,[R0]
+        LSLS    R0,#31
+        MOVNE   R0,#0x02                ; Privileged Thread mode, use PSP
+        MOVEQ   R0,#0x03                ; Unprivileged Thread mode, use PSP
+        MSR     CONTROL,R0
+        BX      LR
+
+        ALIGN
+}
+
+
+/*--------------------------- _alloc_box ------------------------------------*/
+
+__asm void *_alloc_box (void *box_mem) {
+   /* Function wrapper for Unprivileged/Privileged mode. */
+        LDR     R12,=__cpp(rt_alloc_box)
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BXNE    R12
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BXEQ    R12
+        SVC     0
+        BX      LR
+
+        ALIGN
+}
+
+
+/*--------------------------- _free_box -------------------------------------*/
+
+__asm U32 _free_box (void *box_mem, void *box) {
+   /* Function wrapper for Unprivileged/Privileged mode. */
+        LDR     R12,=__cpp(rt_free_box)
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        BXNE    R12
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        BXEQ    R12
+        SVC     0
+        BX      LR
+
+        ALIGN
+}
+
+
+/*-------------------------- SVC_Handler ------------------------------------*/
+
+__asm void SVC_Handler (void) {
+        PRESERVE8
+
+        IMPORT  SVC_Count
+        IMPORT  SVC_Table
+        IMPORT  rt_stk_check
+
+#ifdef  IFX_XMC4XXX
+        EXPORT  SVC_Handler_Veneer
+SVC_Handler_Veneer
+#endif
+
+        MRS     R0,PSP                  ; Read PSP
+        LDR     R1,[R0,#24]             ; Read Saved PC from Stack
+        LDRB    R1,[R1,#-2]             ; Load SVC Number
+        CBNZ    R1,SVC_User
+
+        LDM     R0,{R0-R3,R12}          ; Read R0-R3,R12 from stack
+        PUSH    {R4,LR}                 ; Save EXC_RETURN
+        BLX     R12                     ; Call SVC Function
+        POP     {R4,LR}                 ; Restore EXC_RETURN
+
+        MRS     R12,PSP                 ; Read PSP
+        STM     R12,{R0-R2}             ; Store return values
+
+        LDR     R3,=__cpp(&os_tsk)
+        LDM     R3,{R1,R2}              ; os_tsk.run, os_tsk.new
+        CMP     R1,R2
+#ifdef  IFX_XMC4XXX
+        PUSHEQ  {LR}
+        POPEQ   {PC}
+#else
+        BXEQ    LR                      ; RETI, no task switch
+#endif
+
+        CBNZ    R1,SVC_ContextSave      ; Runtask not deleted?
+
+        TST     LR,#0x10                ; is it extended frame?
+        BNE     SVC_ContextRestore
+        LDR     R1,=0xE000EF34
+        LDR     R0,[R1]                 ; Load FPCCR
+        BIC     R0,#1                   ; Clear LSPACT (Lazy state)
+        STR     R0,[R1]                 ; Store FPCCR
+        B       SVC_ContextRestore
+
+SVC_ContextSave
+        TST     LR,#0x10                ; is it extended frame?
+#if (__FPU_PRESENT == 1)
+        VSTMDBEQ R12!,{S16-S31}         ; yes, stack also VFP hi-regs
+#endif
+        MOVEQ   R0,#0x01                ; os_tsk->stack_frame val
+        MOVNE   R0,#0x00
+        STRB    R0,[R1,#TCB_STACKF]     ; os_tsk.run->stack_frame = val
+        STMDB   R12!,{R4-R11}           ; Save Old context
+        STR     R12,[R1,#TCB_TSTACK]    ; Update os_tsk.run->tsk_stack
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            ; Check for Stack overflow
+        POP     {R2,R3}
+
+SVC_ContextRestore
+        STR     R2,[R3]                 ; os_tsk.run = os_tsk.new
+
+        LDR     R12,[R2,#TCB_TSTACK]    ; os_tsk.new->tsk_stack
+        LDMIA   R12!,{R4-R11}           ; Restore New Context
+        LDRB    R0,[R2,#TCB_STACKF]     ; Stack Frame
+        CMP     R0,#0                   ; Basic/Extended Stack Frame
+        MVNEQ   LR,#:NOT:0xFFFFFFFD     ; set EXC_RETURN value
+        MVNNE   LR,#:NOT:0xFFFFFFED
+#if (__FPU_PRESENT == 1)
+        VLDMIANE R12!,{S16-S31}         ; restore VFP hi-registers
+#endif
+        MSR     PSP,R12                 ; Write PSP
+
+SVC_Exit
+#ifdef  IFX_XMC4XXX
+        PUSH    {LR}
+        POP     {PC}
+#else
+        BX      LR
+#endif
+
+        /*------------------- User SVC ------------------------------*/
+
+SVC_User
+        PUSH    {R4,LR}                 ; Save Registers
+        LDR     R2,=SVC_Count
+        LDR     R2,[R2]
+        CMP     R1,R2
+        BHI     SVC_Done                ; Overflow
+
+        LDR     R4,=SVC_Table-4
+        LDR     R4,[R4,R1,LSL #2]       ; Load SVC Function Address
+
+        LDM     R0,{R0-R3,R12}          ; Read R0-R3,R12 from stack
+        BLX     R4                      ; Call SVC Function
+
+        MRS     R12,PSP
+        STM     R12,{R0-R3}             ; Function return values
+SVC_Done
+        POP     {R4,PC}                 ; RETI
+
+        ALIGN
+}
+
+
+/*-------------------------- PendSV_Handler ---------------------------------*/
+
+__asm void PendSV_Handler (void) {
+        PRESERVE8
+
+#ifdef  IFX_XMC4XXX
+        EXPORT  PendSV_Handler_Veneer
+PendSV_Handler_Veneer
+#endif
+
+        PUSH    {R4,LR}                 ; Save EXC_RETURN
+        BL      __cpp(rt_pop_req)
+
+Sys_Switch
+        POP     {R4,LR}                 ; Restore EXC_RETURN
+
+        LDR     R3,=__cpp(&os_tsk)
+        LDM     R3,{R1,R2}              ; os_tsk.run, os_tsk.new
+        CMP     R1,R2
+#ifdef  IFX_XMC4XXX
+        PUSHEQ  {LR}
+        POPEQ   {PC}
+#else
+        BXEQ    LR                      ; RETI, no task switch
+#endif
+
+        MRS     R12,PSP                 ; Read PSP
+        TST     LR,#0x10                ; is it extended frame?
+#if (__FPU_PRESENT == 1)
+        VSTMDBEQ R12!,{S16-S31}         ; yes, stack also VFP hi-regs
+#endif
+        MOVEQ   R0,#0x01                ; os_tsk->stack_frame val
+        MOVNE   R0,#0x00
+        STRB    R0,[R1,#TCB_STACKF]     ; os_tsk.run->stack_frame = val
+        STMDB   R12!,{R4-R11}           ; Save Old context
+        STR     R12,[R1,#TCB_TSTACK]    ; Update os_tsk.run->tsk_stack
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            ; Check for Stack overflow
+        POP     {R2,R3}
+
+        STR     R2,[R3]                 ; os_tsk.run = os_tsk.new
+
+        LDR     R12,[R2,#TCB_TSTACK]    ; os_tsk.new->tsk_stack
+        LDMIA   R12!,{R4-R11}           ; Restore New Context
+        LDRB    R0,[R2,#TCB_STACKF]     ; Stack Frame
+        CMP     R0,#0                   ; Basic/Extended Stack Frame
+        MVNEQ   LR,#:NOT:0xFFFFFFFD     ; set EXC_RETURN value
+        MVNNE   LR,#:NOT:0xFFFFFFED
+#if (__FPU_PRESENT == 1)
+        VLDMIANE R12!,{S16-S31}         ; restore VFP hi-regs
+#endif
+        MSR     PSP,R12                 ; Write PSP
+
+Sys_Exit
+#ifdef  IFX_XMC4XXX
+        PUSH    {LR}
+        POP     {PC}
+#else
+        BX      LR                      ; Return to Thread Mode
+#endif
+
+        ALIGN
+}
+
+
+/*-------------------------- SysTick_Handler --------------------------------*/
+
+__asm void SysTick_Handler (void) {
+        PRESERVE8
+
+#ifdef  IFX_XMC4XXX
+        EXPORT  SysTick_Handler_Veneer
+SysTick_Handler_Veneer
+#endif
+
+        PUSH    {R4,LR}                 ; Save EXC_RETURN
+        BL      __cpp(rt_systick)
+        B       Sys_Switch
+
+        ALIGN
+}
+
+
+/*-------------------------- OS_Tick_Handler --------------------------------*/
+
+__asm void OS_Tick_Handler (void) {
+        PRESERVE8
+
+        PUSH    {R4,LR}                 ; Save EXC_RETURN
+        BL      __cpp(os_tick_irqack)
+        BL      __cpp(rt_systick)
+        B       Sys_Switch
+
+        ALIGN
+}
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_ARM/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_ARM/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,57 @@
+;/*----------------------------------------------------------------------------
+; *      CMSIS-RTOS  -  RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.70
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used
+; *    to endorse or promote products derived from this software without
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+                AREA    SVC_TABLE, CODE, READONLY
+
+                EXPORT  SVC_Count
+
+SVC_Cnt         EQU    (SVC_End-SVC_Table)/4
+SVC_Count       DCD     SVC_Cnt
+
+; Import user SVC functions here.
+;               IMPORT  __SVC_1
+
+                EXPORT  SVC_Table
+SVC_Table
+; Insert user SVC functions here. SVC 0 used by RTL Kernel.
+;               DCD     __SVC_1                 ; user SVC function
+
+SVC_End
+
+                END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_GCC/HAL_CM4.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_GCC/HAL_CM4.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,419 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM4.S
+ *      Purpose: Hardware Abstraction Layer for Cortex-M4
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+        .file   "HAL_CM4.S"
+        .syntax unified
+
+        .equ    TCB_STACKF, 37
+        .equ    TCB_TSTACK, 44
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+        .thumb
+
+        .section ".text"
+        .align  2
+
+
+/*--------------------------- rt_set_PSP ------------------------------------*/
+
+#       void rt_set_PSP (U32 stack);
+
+        .thumb_func
+        .type   rt_set_PSP, %function
+        .global rt_set_PSP
+rt_set_PSP:
+        .fnstart
+        .cantunwind
+
+        MSR     PSP,R0
+        BX      LR
+
+        .fnend
+        .size   rt_set_PSP, .-rt_set_PSP
+
+
+/*--------------------------- rt_get_PSP ------------------------------------*/
+
+#       U32 rt_get_PSP (void);
+
+        .thumb_func
+        .type   rt_get_PSP, %function
+        .global rt_get_PSP
+rt_get_PSP:
+        .fnstart
+        .cantunwind
+
+        MRS     R0,PSP
+        BX      LR
+
+        .fnend
+        .size   rt_get_PSP, .-rt_get_PSP
+
+
+/*--------------------------- os_set_env ------------------------------------*/
+
+#       void os_set_env (void);
+        /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
+
+        .thumb_func
+        .type   os_set_env, %function
+        .global os_set_env
+os_set_env:
+        .fnstart
+        .cantunwind
+
+        MOV     R0,SP                   /* PSP = MSP */
+        MSR     PSP,R0
+        LDR     R0,=os_flags
+        LDRB    R0,[R0]
+        LSLS    R0,#31
+        ITE     NE
+        MOVNE   R0,#0x02                /* Privileged Thread mode, use PSP */
+        MOVEQ   R0,#0x03                /* Unprivileged Thread mode, use PSP */
+        MSR     CONTROL,R0
+        BX      LR
+
+        .fnend
+        .size   os_set_env, .-os_set_env
+
+
+/*--------------------------- _alloc_box ------------------------------------*/
+
+#      void *_alloc_box (void *box_mem);
+       /* Function wrapper for Unprivileged/Privileged mode. */
+
+        .thumb_func
+        .type   _alloc_box, %function
+        .global _alloc_box
+_alloc_box:
+        .fnstart
+        .cantunwind
+
+        LDR     R12,=rt_alloc_box
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        IT      NE
+        BXNE    R12
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        IT      EQ
+        BXEQ    R12
+        SVC     0
+        BX      LR
+
+        .fnend
+        .size   _alloc_box, .-_alloc_box
+
+
+/*--------------------------- _free_box -------------------------------------*/
+
+#       U32 _free_box (void *box_mem, void *box);
+        /* Function wrapper for Unprivileged/Privileged mode. */
+
+        .thumb_func
+        .type   _free_box, %function
+        .global _free_box
+_free_box:
+        .fnstart
+        .cantunwind
+
+        LDR     R12,=rt_free_box
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        IT      NE
+        BXNE    R12
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        IT      EQ
+        BXEQ    R12
+        SVC     0
+        BX      LR
+
+        .fnend
+        .size   _free_box, .-_free_box
+
+
+/*-------------------------- SVC_Handler ------------------------------------*/
+
+#       void SVC_Handler (void);
+
+        .thumb_func
+        .type   SVC_Handler, %function
+        .global SVC_Handler
+SVC_Handler:
+        .ifdef  IFX_XMC4XXX
+        .global SVC_Handler_Veneer
+SVC_Handler_Veneer:
+        .endif
+        .fnstart
+        .cantunwind
+
+        MRS     R0,PSP                  /* Read PSP */
+        LDR     R1,[R0,#24]             /* Read Saved PC from Stack */
+        LDRB    R1,[R1,#-2]             /* Load SVC Number */
+        CBNZ    R1,SVC_User
+
+        LDM     R0,{R0-R3,R12}          /* Read R0-R3,R12 from stack */
+        PUSH    {R4,LR}                 /* Save EXC_RETURN */
+        BLX     R12                     /* Call SVC Function */
+        POP     {R4,LR}                 /* Restore EXC_RETURN */
+
+        MRS     R12,PSP                 /* Read PSP */
+        STM     R12,{R0-R2}             /* Store return values */
+
+        LDR     R3,=os_tsk
+        LDM     R3,{R1,R2}              /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+        .ifdef  IFX_XMC4XXX
+        ITT     EQ
+        PUSHEQ  {LR}
+        POPEQ   {PC}
+        .else
+        IT      EQ
+        BXEQ    LR                      /* RETI, no task switch */
+        .endif
+
+        CBNZ    R1,SVC_ContextSave      /* Runtask not deleted? */
+
+        TST     LR,#0x10                /* is it extended frame? */
+        BNE     SVC_ContextRestore
+        LDR     R1,=0xE000EF34
+        LDR     R0,[R1]                 /* Load FPCCR */
+        BIC     R0,#1                   /* Clear LSPACT (Lazy state) */
+        STR     R0,[R1]                 /* Store FPCCR */
+        B       SVC_ContextRestore
+
+SVC_ContextSave:
+        TST     LR,#0x10                /* is it extended frame? */
+#ifdef __FPU_PRESENT
+        ITTE    EQ
+        VSTMDBEQ R12!,{S16-S31}         /* yes, stack also VFP hi-regs */
+#else
+        ITE     EQ
+#endif
+        MOVEQ   R0,#0x01                /* os_tsk->stack_frame val */
+        MOVNE   R0,#0x00
+        STRB    R0,[R1,#TCB_STACKF]     /* os_tsk.run->stack_frame = val */
+        STMDB   R12!,{R4-R11}           /* Save Old context */
+        STR     R12,[R1,#TCB_TSTACK]    /* Update os_tsk.run->tsk_stack */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+SVC_ContextRestore:
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R12,[R2,#TCB_TSTACK]    /* os_tsk.new->tsk_stack */
+        LDMIA   R12!,{R4-R11}           /* Restore New Context */
+        LDRB    R0,[R2,#TCB_STACKF]     /* Stack Frame */
+        CMP     R0,#0                   /* Basic/Extended Stack Frame */
+#ifdef __FPU_PRESENT
+        ITEE    EQ
+#else
+        ITE     EQ
+#endif
+        MVNEQ   LR,#~0xFFFFFFFD         /* set EXC_RETURN value */
+        MVNNE   LR,#~0xFFFFFFED
+#ifdef __FPU_PRESENT
+        VLDMIANE R12!,{S16-S31}         /* restore VFP hi-registers */
+#endif
+        MSR     PSP,R12                 /* Write PSP */
+
+SVC_Exit:
+        .ifdef  IFX_XMC4XXX
+        PUSH    {LR}
+        POP     {PC}
+        .else
+        BX      LR
+        .endif
+
+        /*------------------- User SVC ------------------------------*/
+
+SVC_User:
+        PUSH    {R4,LR}                 /* Save Registers */
+        LDR     R2,=SVC_Count
+        LDR     R2,[R2]
+        CMP     R1,R2
+        BHI     SVC_Done                /* Overflow */
+
+        LDR     R4,=SVC_Table-4
+        LDR     R4,[R4,R1,LSL #2]       /* Load SVC Function Address */
+
+        LDM     R0,{R0-R3,R12}          /* Read R0-R3,R12 from stack */
+        BLX     R4                      /* Call SVC Function */
+
+        MRS     R12,PSP
+        STM     R12,{R0-R3}             /* Function return values */
+SVC_Done:
+        POP     {R4,PC}                 /* RETI */
+
+        .fnend
+        .size   SVC_Handler, .-SVC_Handler
+
+
+/*-------------------------- PendSV_Handler ---------------------------------*/
+
+#       void PendSV_Handler (void);
+
+        .thumb_func
+        .type   PendSV_Handler, %function
+        .global PendSV_Handler
+        .global Sys_Switch
+PendSV_Handler:
+        .ifdef  IFX_XMC4XXX
+        .global PendSV_Handler_Veneer
+PendSV_Handler_Veneer:
+        .endif
+        .fnstart
+        .cantunwind
+
+        PUSH    {R4,LR}                 /* Save EXC_RETURN */
+        BL      rt_pop_req
+
+Sys_Switch:
+        POP     {R4,LR}                 /* Restore EXC_RETURN */
+
+        LDR     R3,=os_tsk
+        LDM     R3,{R1,R2}              /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+        .ifdef  IFX_XMC4XXX
+        ITT     EQ
+        PUSHEQ  {LR}
+        POPEQ   {PC}
+        .else
+        IT      EQ
+        BXEQ    LR                      /* RETI, no task switch */
+        .endif
+
+        MRS     R12,PSP                 /* Read PSP */
+        TST     LR,#0x10                /* is it extended frame? */
+#ifdef __FPU_PRESENT
+        ITTE    EQ
+        VSTMDBEQ R12!,{S16-S31}         /* yes, stack also VFP hi-regs */
+#else
+        ITE     EQ
+#endif
+        MOVEQ   R0,#0x01                /* os_tsk->stack_frame val */
+        MOVNE   R0,#0x00
+        STRB    R0,[R1,#TCB_STACKF]     /* os_tsk.run->stack_frame = val */
+        STMDB   R12!,{R4-R11}           /* Save Old context */
+        STR     R12,[R1,#TCB_TSTACK]    /* Update os_tsk.run->tsk_stack */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R12,[R2,#TCB_TSTACK]    /* os_tsk.new->tsk_stack */
+        LDMIA   R12!,{R4-R11}           /* Restore New Context */
+        LDRB    R0,[R2,#TCB_STACKF]     /* Stack Frame */
+        CMP     R0,#0                   /* Basic/Extended Stack Frame */
+#ifdef __FPU_PRESENT
+        ITEE    EQ
+#else
+        ITE     EQ
+#endif
+        MVNEQ   LR,#~0xFFFFFFFD         /* set EXC_RETURN value */
+        MVNNE   LR,#~0xFFFFFFED
+#ifdef __FPU_PRESENT
+        VLDMIANE R12!,{S16-S31}         /* restore VFP hi-registers */
+#endif
+        MSR     PSP,R12                 /* Write PSP */
+
+Sys_Exit:
+        .ifdef  IFX_XMC4XXX
+        PUSH    {LR}
+        POP     {PC}
+        .else
+        BX      LR                      /* Return to Thread Mode */
+        .endif
+
+        .fnend
+        .size   PendSV_Handler, .-PendSV_Handler
+
+
+/*-------------------------- SysTick_Handler --------------------------------*/
+
+#       void SysTick_Handler (void);
+
+        .thumb_func
+        .type   SysTick_Handler, %function
+        .global SysTick_Handler
+SysTick_Handler:
+        .ifdef  IFX_XMC4XXX
+        .global SysTick_Handler_Veneer
+SysTick_Handler_Veneer:
+        .endif
+        .fnstart
+        .cantunwind
+
+        PUSH    {R4,LR}                 /* Save EXC_RETURN */
+        BL      rt_systick
+        B       Sys_Switch
+
+        .fnend
+        .size   SysTick_Handler, .-SysTick_Handler
+
+
+/*-------------------------- OS_Tick_Handler --------------------------------*/
+
+#       void OS_Tick_Handler (void);
+
+        .thumb_func
+        .type   OS_Tick_Handler, %function
+        .global OS_Tick_Handler
+OS_Tick_Handler:
+        .fnstart
+        .cantunwind
+
+        PUSH    {R4,LR}                 /* Save EXC_RETURN */
+        BL      os_tick_irqack
+        BL      rt_systick
+        B       Sys_Switch
+
+        .fnend
+        .size   OS_Tick_Handler, .-OS_Tick_Handler
+
+
+        .end
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_GCC/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_GCC/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,56 @@
+;/*----------------------------------------------------------------------------
+; *      CMSIS-RTOS - RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.70
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used
+; *    to endorse or promote products derived from this software without
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+        .file   "SVC_Table.S"
+
+
+        .section ".svc_table"
+
+        .global  SVC_Table
+SVC_Table:
+/* Insert user SVC functions here. SVC 0 used by RTL Kernel. */
+#       .long   __SVC_1                 /* user SVC function */
+SVC_End:
+
+        .global  SVC_Count
+SVC_Count:
+        .long   (SVC_End-SVC_Table)/4
+
+
+        .end
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_IAR/HAL_CM4.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_IAR/HAL_CM4.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,363 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    HAL_CM4.S
+ *      Purpose: Hardware Abstraction Layer for Cortex-M4
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+        NAME    HAL_CM4.S
+
+        #define TCB_STACKF 37
+        #define TCB_TSTACK 44
+
+        EXTERN  os_flags
+        EXTERN  os_tsk
+        EXTERN  rt_alloc_box
+        EXTERN  rt_free_box
+        EXTERN  rt_stk_check
+        EXTERN  rt_pop_req
+        EXTERN  rt_systick
+        EXTERN  os_tick_irqack
+        EXTERN  SVC_Table
+        EXTERN  SVC_Count
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+        SECTION .text:CODE:NOROOT(2)
+        THUMB
+
+/*--------------------------- rt_set_PSP ------------------------------------*/
+
+;       void rt_set_PSP (U32 stack);
+
+        PUBLIC  rt_set_PSP
+rt_set_PSP:
+
+        MSR     PSP,R0
+        BX      LR
+
+
+/*--------------------------- rt_get_PSP ------------------------------------*/
+
+;       U32 rt_get_PSP (void);
+
+        PUBLIC  rt_get_PSP
+rt_get_PSP:
+
+        MRS     R0,PSP
+        BX      LR
+
+
+/*--------------------------- os_set_env ------------------------------------*/
+
+;       void os_set_env (void);
+        /* Switch to Unprivileged/Privileged Thread mode, use PSP. */
+
+        PUBLIC  os_set_env
+os_set_env:
+
+        MOV     R0,SP                   /* PSP = MSP */
+        MSR     PSP,R0
+        LDR     R0,=os_flags
+        LDRB    R0,[R0]
+        LSLS    R0,#31
+        ITE     NE
+        MOVNE   R0,#0x02                /* Privileged Thread mode, use PSP */
+        MOVEQ   R0,#0x03                /* Unprivileged Thread mode, use PSP */
+        MSR     CONTROL,R0
+        BX      LR
+
+
+/*--------------------------- _alloc_box ------------------------------------*/
+
+;      void *_alloc_box (void *box_mem);
+       /* Function wrapper for Unprivileged/Privileged mode. */
+
+        PUBLIC  _alloc_box
+_alloc_box:
+
+        LDR     R12,=rt_alloc_box
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        IT      NE
+        BXNE    R12
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        IT      EQ
+        BXEQ    R12
+        SVC     0
+        BX      LR
+
+
+/*--------------------------- _free_box -------------------------------------*/
+
+;       U32 _free_box (void *box_mem, void *box);
+        /* Function wrapper for Unprivileged/Privileged mode. */
+
+        PUBLIC  _free_box
+_free_box:
+
+        LDR     R12,=rt_free_box
+        MRS     R3,IPSR
+        LSLS    R3,#24
+        IT      NE
+        BXNE    R12
+        MRS     R3,CONTROL
+        LSLS    R3,#31
+        IT      EQ
+        BXEQ    R12
+        SVC     0
+        BX      LR
+
+
+/*-------------------------- SVC_Handler ------------------------------------*/
+
+;       void SVC_Handler (void);
+
+        PUBLIC  SVC_Handler
+SVC_Handler:
+
+#ifdef IFX_XMC4XXX
+        PUBLIC  SVC_Handler_Veneer
+SVC_Handler_Veneer:
+#endif
+
+        MRS     R0,PSP                  /* Read PSP */
+        LDR     R1,[R0,#24]             /* Read Saved PC from Stack */
+        LDRB    R1,[R1,#-2]             /* Load SVC Number */
+        CBNZ    R1,SVC_User
+
+        LDM     R0,{R0-R3,R12}          /* Read R0-R3,R12 from stack */
+        PUSH    {R4,LR}                 /* Save EXC_RETURN */
+        BLX     R12                     /* Call SVC Function */
+        POP     {R4,LR}                 /* Restore EXC_RETURN */
+
+        MRS     R12,PSP                 /* Read PSP */
+        STM     R12,{R0-R2}             /* Store return values */
+
+        LDR     R3,=os_tsk
+        LDM     R3,{R1,R2}              /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+#ifdef  IFX_XMC4XXX
+        ITT      EQ
+        PUSHEQ  {LR}
+        POPEQ   {PC}
+#else
+        IT      EQ
+        BXEQ    LR                      /* RETI, no task switch */
+#endif
+
+        CBNZ    R1,SVC_ContextSave      /* Runtask not deleted? */
+
+        TST     LR,#0x10                /* is it extended frame? */
+        BNE     SVC_ContextRestore
+        LDR     R1,=0xE000EF34
+        LDR     R0,[R1]                 /* Load FPCCR */
+        BIC     R0,R0,#1                /* Clear LSPACT (Lazy state) */
+        STR     R0,[R1]                 /* Store FPCCR */
+        B       SVC_ContextRestore
+
+SVC_ContextSave:
+        TST     LR,#0x10                /* is it extended frame? */
+#if (__FPU_PRESENT == 1)
+        ITTE    EQ
+        VSTMDBEQ R12!,{S16-S31}         /* yes, stack also VFP hi-regs */
+#else
+        ITE     EQ
+#endif
+        MOVEQ   R0,#0x01                /* os_tsk->stack_frame val */
+        MOVNE   R0,#0x00
+        STRB    R0,[R1,#TCB_STACKF]     /* os_tsk.run->stack_frame = val */
+        STMDB   R12!,{R4-R11}           /* Save Old context */
+        STR     R12,[R1,#TCB_TSTACK]    /* Update os_tsk.run->tsk_stack */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+SVC_ContextRestore:
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R12,[R2,#TCB_TSTACK]    /* os_tsk.new->tsk_stack */
+        LDMIA   R12!,{R4-R11}           /* Restore New Context */
+        LDRB    R0,[R2,#TCB_STACKF]     /* Stack Frame */
+        CMP     R0,#0                   /* Basic/Extended Stack Frame */
+#if (__FPU_PRESENT == 1)
+        ITEE    EQ
+#else
+        ITE     EQ
+#endif
+        MVNEQ   LR,#~0xFFFFFFFD         /* set EXC_RETURN value */
+        MVNNE   LR,#~0xFFFFFFED
+#if (__FPU_PRESENT == 1)
+        VLDMIANE R12!,{S16-S31}         /* restore VFP hi-registers */
+#endif
+        MSR     PSP,R12                 /* Write PSP */
+
+SVC_Exit:
+#ifdef  IFX_XMC4XXX
+        PUSH    {LR}
+        POP     {PC}
+#else
+        BX      LR
+#endif
+
+        /*------------------- User SVC ------------------------------*/
+
+SVC_User:
+        PUSH    {R4,LR}                 /* Save Registers */
+        LDR     R2,=SVC_Count
+        LDR     R2,[R2]
+        CMP     R1,R2
+        BHI     SVC_Done                /* Overflow */
+
+        LDR     R4,=SVC_Table-4
+        LDR     R4,[R4,R1,LSL #2]       /* Load SVC Function Address */
+
+        LDM     R0,{R0-R3,R12}          /* Read R0-R3,R12 from stack */
+        BLX     R4                      /* Call SVC Function */
+
+        MRS     R12,PSP
+        STM     R12,{R0-R3}             /* Function return values */
+SVC_Done:
+        POP     {R4,PC}                 /* RETI */
+
+
+/*-------------------------- PendSV_Handler ---------------------------------*/
+
+;       void PendSV_Handler (void);
+
+        PUBLIC  PendSV_Handler
+PendSV_Handler:
+
+#ifdef  IFX_XMC4XXX
+        PUBLIC  PendSV_Handler_Veneer
+PendSV_Handler_Veneer:
+#endif
+
+        PUSH    {R4,LR}                 /* Save EXC_RETURN */
+        BL      rt_pop_req
+
+Sys_Switch:
+        POP     {R4,LR}                 /* Restore EXC_RETURN */
+
+        LDR     R3,=os_tsk
+        LDM     R3,{R1,R2}              /* os_tsk.run, os_tsk.new */
+        CMP     R1,R2
+#ifdef  IFX_XMC4XXX
+        ITT     EQ
+        PUSHEQ  {LR}
+        POPEQ   {PC}
+#else
+        IT      EQ
+        BXEQ    LR                      /* RETI, no task switch */
+#endif
+
+        MRS     R12,PSP                 /* Read PSP */
+        TST     LR,#0x10                /* is it extended frame? */
+#if (__FPU_PRESENT == 1)
+        ITTE    EQ
+        VSTMDBEQ R12!,{S16-S31}         /* yes, stack also VFP hi-regs */
+#else
+        ITE     EQ
+#endif
+        MOVEQ   R0,#0x01                /* os_tsk->stack_frame val */
+        MOVNE   R0,#0x00
+        STRB    R0,[R1,#TCB_STACKF]     /* os_tsk.run->stack_frame = val */
+        STMDB   R12!,{R4-R11}           /* Save Old context */
+        STR     R12,[R1,#TCB_TSTACK]    /* Update os_tsk.run->tsk_stack */
+
+        PUSH    {R2,R3}
+        BL      rt_stk_check            /* Check for Stack overflow */
+        POP     {R2,R3}
+
+        STR     R2,[R3]                 /* os_tsk.run = os_tsk.new */
+
+        LDR     R12,[R2,#TCB_TSTACK]    /* os_tsk.new->tsk_stack */
+        LDMIA   R12!,{R4-R11}           /* Restore New Context */
+        LDRB    R0,[R2,#TCB_STACKF]     /* Stack Frame */
+        CMP     R0,#0                   /* Basic/Extended Stack Frame */
+#if (__FPU_PRESENT == 1)
+        ITEE    EQ
+#else
+        ITE     EQ
+#endif
+        MVNEQ   LR,#~0xFFFFFFFD         /* set EXC_RETURN value */
+        MVNNE   LR,#~0xFFFFFFED
+#if (__FPU_PRESENT == 1)
+        VLDMIANE R12!,{S16-S31}         /* restore VFP hi-registers */
+#endif
+        MSR     PSP,R12                 /* Write PSP */
+
+Sys_Exit:
+#ifdef  IFX_XMC4XXX
+        PUSH    {LR}
+        POP     {PC}
+#else
+        BX      LR                      /* Return to Thread Mode */
+#endif
+
+
+/*-------------------------- SysTick_Handler --------------------------------*/
+
+;       void SysTick_Handler (void);
+
+        PUBLIC  SysTick_Handler
+SysTick_Handler:
+#ifdef  IFX_XMC4XXX
+        PUBLIC  SysTick_Handler_Veneer
+SysTick_Handler_Veneer:
+#endif
+
+        PUSH    {R4,LR}                 /* Save EXC_RETURN */
+        BL      rt_systick
+        B       Sys_Switch
+
+
+/*-------------------------- OS_Tick_Handler --------------------------------*/
+
+;       void OS_Tick_Handler (void);
+
+        PUBLIC  OS_Tick_Handler
+OS_Tick_Handler:
+
+        PUSH    {R4,LR}                 /* Save EXC_RETURN */
+        BL      os_tick_irqack
+        BL      rt_systick
+        B       Sys_Switch
+
+
+        END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_IAR/SVC_Table.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/TARGET_RTOS_M4_M7/TOOLCHAIN_IAR/SVC_Table.S	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,58 @@
+;/*----------------------------------------------------------------------------
+; *      CMSIS-RTOS  -  RTX
+; *----------------------------------------------------------------------------
+; *      Name:    SVC_TABLE.S
+; *      Purpose: Pre-defined SVC Table for Cortex-M
+; *      Rev.:    V4.70
+; *----------------------------------------------------------------------------
+; *
+; * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+; * All rights reserved.
+; * Redistribution and use in source and binary forms, with or without
+; * modification, are permitted provided that the following conditions are met:
+; *  - Redistributions of source code must retain the above copyright
+; *    notice, this list of conditions and the following disclaimer.
+; *  - Redistributions in binary form must reproduce the above copyright
+; *    notice, this list of conditions and the following disclaimer in the
+; *    documentation and/or other materials provided with the distribution.
+; *  - Neither the name of ARM  nor the names of its contributors may be used
+; *    to endorse or promote products derived from this software without
+; *    specific prior written permission.
+; *
+; * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+; * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+; * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+; * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+; * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+; * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+; * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+; * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+; * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+; * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+; * POSSIBILITY OF SUCH DAMAGE.
+; *---------------------------------------------------------------------------*/
+
+
+                NAME    SVC_TABLE
+                SECTION .text:CONST (2)
+
+                PUBLIC  SVC_Count
+
+SVC_Cnt         EQU    (SVC_End-SVC_Table)/4
+SVC_Count       DCD     SVC_Cnt
+
+; Import user SVC functions here.
+;               IMPORT  __SVC_1
+
+                PUBLIC  SVC_Table
+SVC_Table
+; Insert user SVC functions here. SVC 0 used by RTL Kernel.
+;               DCD     __SVC_1                 ; user SVC function
+
+SVC_End
+
+                END
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/cmsis_os.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/cmsis_os.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,749 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/* ----------------------------------------------------------------------
+ * $Date:        5. February 2013
+ * $Revision:    V1.02
+ *
+ * Project:      CMSIS-RTOS API
+ * Title:        cmsis_os.h RTX header file
+ *
+ * Version 0.02
+ *    Initial Proposal Phase
+ * Version 0.03
+ *    osKernelStart added, optional feature: main started as thread
+ *    osSemaphores have standard behavior
+ *    osTimerCreate does not start the timer, added osTimerStart
+ *    osThreadPass is renamed to osThreadYield
+ * Version 1.01
+ *    Support for C++ interface
+ *     - const attribute removed from the osXxxxDef_t typedef's
+ *     - const attribute added to the osXxxxDef macros
+ *    Added: osTimerDelete, osMutexDelete, osSemaphoreDelete
+ *    Added: osKernelInitialize
+ * Version 1.02
+ *    Control functions for short timeouts in microsecond resolution:
+ *    Added: osKernelSysTick, osKernelSysTickFrequency, osKernelSysTickMicroSec
+ *    Removed: osSignalGet 
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 2013 ARM LIMITED
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+
+#ifndef _CMSIS_OS_H
+#define _CMSIS_OS_H
+
+#define CMSIS_OS_RTX
+
+// __MBED_CMSIS_RTOS_CM captures our changes to the RTX kernel
+#ifndef __MBED_CMSIS_RTOS_CM
+#define __MBED_CMSIS_RTOS_CM
+#endif
+// we use __CMSIS_RTOS version, which changes some API in the kernel
+#ifndef __CMSIS_RTOS
+#define __CMSIS_RTOS
+#endif
+
+// The stack space occupied is mainly dependent on the underling C standard library
+#if defined(TOOLCHAIN_GCC) || defined(TOOLCHAIN_ARM_STD) || defined(TOOLCHAIN_IAR)
+#    define WORDS_STACK_SIZE   512
+#elif defined(TOOLCHAIN_ARM_MICRO)
+#    define WORDS_STACK_SIZE   128
+#endif
+
+#ifdef __MBED_CMSIS_RTOS_CM
+
+/* If os timers macro is set to 0, there's no timer thread created, therefore
+ * main thread has tid 0x01  
+ */
+#if defined(OS_TIMERS) && (OS_TIMERS == 0)
+#define MAIN_THREAD_ID 0x01
+#else
+#define MAIN_THREAD_ID 0x02
+#endif
+#endif
+
+#if defined(TARGET_XDOT_L151CC)
+#define DEFAULT_STACK_SIZE         (WORDS_STACK_SIZE/2)
+#else
+#define DEFAULT_STACK_SIZE         (WORDS_STACK_SIZE*4)
+#endif
+
+#define osCMSIS           0x10002U     ///< CMSIS-RTOS API version (main [31:16] .sub [15:0])
+
+#define osCMSIS_RTX     ((4<<16)|80)   ///< RTOS identification and version (main [31:16] .sub [15:0])
+
+#define osKernelSystemId "RTX V4.80"   ///< RTOS identification string
+
+
+#define osFeature_MainThread   1       ///< main can be thread
+#define osFeature_Pool         1       ///< Memory Pools available
+#define osFeature_MailQ        1       ///< Mail Queues available
+#define osFeature_MessageQ     1       ///< Message Queues available
+#define osFeature_Signals      16      ///< 16 Signal Flags available per thread
+#define osFeature_Semaphore    65535   ///< Maximum count for \ref osSemaphoreCreate function
+#define osFeature_Wait         0       ///< osWait not available
+#define osFeature_SysTick      1       ///< osKernelSysTick functions available
+#define osFeature_ThreadEnum   1       ///< Thread enumeration available
+
+#if defined (__CC_ARM)
+#define os_InRegs __value_in_regs      // Compiler specific: force struct in registers
+#elif defined (__ICCARM__)
+#define os_InRegs __value_in_regs      // Compiler specific: force struct in registers
+#else
+#define os_InRegs
+#endif
+
+#include <stdint.h>
+#include <stddef.h>
+
+#ifdef  __cplusplus
+extern "C"
+{
+#endif
+
+// ==== Enumeration, structures, defines ====
+
+/// Priority used for thread control.
+typedef enum  {
+  osPriorityIdle          = -3,          ///< priority: idle (lowest)
+  osPriorityLow           = -2,          ///< priority: low
+  osPriorityBelowNormal   = -1,          ///< priority: below normal
+  osPriorityNormal        =  0,          ///< priority: normal (default)
+  osPriorityAboveNormal   = +1,          ///< priority: above normal
+  osPriorityHigh          = +2,          ///< priority: high
+  osPriorityRealtime      = +3,          ///< priority: realtime (highest)
+  osPriorityError         =  0x84        ///< system cannot determine priority or thread has illegal priority
+} osPriority;
+
+/// Timeout value.
+#define osWaitForever     0xFFFFFFFFU    ///< wait forever timeout value
+
+/// Status code values returned by CMSIS-RTOS functions.
+typedef enum  {
+  osOK                    =     0,       ///< function completed; no error or event occurred.
+  osEventSignal           =  0x08,       ///< function completed; signal event occurred.
+  osEventMessage          =  0x10,       ///< function completed; message event occurred.
+  osEventMail             =  0x20,       ///< function completed; mail event occurred.
+  osEventTimeout          =  0x40,       ///< function completed; timeout occurred.
+  osErrorParameter        =  0x80,       ///< parameter error: a mandatory parameter was missing or specified an incorrect object.
+  osErrorResource         =  0x81,       ///< resource not available: a specified resource was not available.
+  osErrorTimeoutResource  =  0xC1,       ///< resource not available within given time: a specified resource was not available within the timeout period.
+  osErrorISR              =  0x82,       ///< not allowed in ISR context: the function cannot be called from interrupt service routines.
+  osErrorISRRecursive     =  0x83,       ///< function called multiple times from ISR with same object.
+  osErrorPriority         =  0x84,       ///< system cannot determine priority or thread has illegal priority.
+  osErrorNoMemory         =  0x85,       ///< system is out of memory: it was impossible to allocate or reserve memory for the operation.
+  osErrorValue            =  0x86,       ///< value of a parameter is out of range.
+  osErrorOS               =  0xFF,       ///< unspecified RTOS error: run-time error but no other error message fits.
+  os_status_reserved      =  0x7FFFFFFF  ///< prevent from enum down-size compiler optimization.
+} osStatus;
+
+
+/// Timer type value for the timer definition.
+typedef enum  {
+  osTimerOnce             =     0,       ///< one-shot timer
+  osTimerPeriodic         =     1        ///< repeating timer
+} os_timer_type;
+
+typedef enum {
+  osThreadInfoState,
+  osThreadInfoStackSize,
+  osThreadInfoStackMax,
+  osThreadInfoEntry,
+  osThreadInfoArg,
+
+  osThreadInfo_reserved   =  0x7FFFFFFF  ///< prevent from enum down-size compiler optimization.
+} osThreadInfo;
+
+/// Entry point of a thread.
+typedef void (*os_pthread) (void const *argument);
+
+/// Entry point of a timer call back function.
+typedef void (*os_ptimer) (void const *argument);
+
+// >>> the following data type definitions may shall adapted towards a specific RTOS
+
+/// Thread ID identifies the thread (pointer to a thread control block).
+typedef struct os_thread_cb *osThreadId;
+
+/// Timer ID identifies the timer (pointer to a timer control block).
+typedef struct os_timer_cb *osTimerId;
+
+/// Mutex ID identifies the mutex (pointer to a mutex control block).
+typedef struct os_mutex_cb *osMutexId;
+
+/// Semaphore ID identifies the semaphore (pointer to a semaphore control block).
+typedef struct os_semaphore_cb *osSemaphoreId;
+
+/// Pool ID identifies the memory pool (pointer to a memory pool control block).
+typedef struct os_pool_cb *osPoolId;
+
+/// Message ID identifies the message queue (pointer to a message queue control block).
+typedef struct os_messageQ_cb *osMessageQId;
+
+/// Mail ID identifies the mail queue (pointer to a mail queue control block).
+typedef struct os_mailQ_cb *osMailQId;
+
+/// Thread enumeration ID identifies the enumeration (pointer to a thread enumeration control block).
+typedef uint32_t *osThreadEnumId;
+
+/// Thread Definition structure contains startup information of a thread.
+typedef struct os_thread_def  {
+  os_pthread               pthread;    ///< start address of thread function
+  osPriority             tpriority;    ///< initial thread priority
+  uint32_t               instances;    ///< maximum number of instances of that thread function
+  uint32_t               stacksize;    ///< stack size requirements in bytes; 0 is default stack size
+#ifdef __MBED_CMSIS_RTOS_CM
+  uint32_t               *stack_pointer;  ///< pointer to the stack memory block
+#endif
+} osThreadDef_t;
+
+/// Timer Definition structure contains timer parameters.
+typedef struct os_timer_def  {
+  os_ptimer                 ptimer;    ///< start address of a timer function
+  void                      *timer;    ///< pointer to internal data
+} osTimerDef_t;
+
+/// Mutex Definition structure contains setup information for a mutex.
+typedef struct os_mutex_def  {
+  void                      *mutex;    ///< pointer to internal data
+} osMutexDef_t;
+
+/// Semaphore Definition structure contains setup information for a semaphore.
+typedef struct os_semaphore_def  {
+  void                  *semaphore;    ///< pointer to internal data
+} osSemaphoreDef_t;
+
+/// Definition structure for memory block allocation.
+typedef struct os_pool_def  {
+  uint32_t                 pool_sz;    ///< number of items (elements) in the pool
+  uint32_t                 item_sz;    ///< size of an item
+  void                       *pool;    ///< pointer to memory for pool
+} osPoolDef_t;
+
+/// Definition structure for message queue.
+typedef struct os_messageQ_def  {
+  uint32_t                queue_sz;    ///< number of elements in the queue
+  void                       *pool;    ///< memory array for messages
+} osMessageQDef_t;
+
+/// Definition structure for mail queue.
+typedef struct os_mailQ_def  {
+  uint32_t                queue_sz;    ///< number of elements in the queue
+  uint32_t                 item_sz;    ///< size of an item
+  void                       *pool;    ///< memory array for mail
+} osMailQDef_t;
+
+/// Event structure contains detailed information about an event.
+typedef struct  {
+  osStatus                 status;     ///< status code: event or error information
+  union  {
+    uint32_t                    v;     ///< message as 32-bit value
+    void                       *p;     ///< message or mail as void pointer
+    int32_t               signals;     ///< signal flags
+  } value;                             ///< event value
+  union  {
+    osMailQId             mail_id;     ///< mail id obtained by \ref osMailCreate
+    osMessageQId       message_id;     ///< message id obtained by \ref osMessageCreate
+  } def;                               ///< event definition
+} osEvent;
+
+
+//  ==== Kernel Control Functions ====
+
+/// Initialize the RTOS Kernel for creating objects.
+/// \return status code that indicates the execution status of the function.
+osStatus osKernelInitialize (void);
+
+/// Start the RTOS Kernel.
+/// \return status code that indicates the execution status of the function.
+osStatus osKernelStart (void);
+
+/// Check if the RTOS kernel is already started.
+/// \return 0 RTOS is not started, 1 RTOS is started.
+int32_t osKernelRunning(void);
+
+#if (defined (osFeature_SysTick)  &&  (osFeature_SysTick != 0))     // System Timer available
+
+/// \cond INTERNAL_VARIABLES
+extern uint32_t const os_tickfreq;
+extern uint16_t const os_tickus_i;
+extern uint16_t const os_tickus_f;
+/// \endcond
+
+/// Get the RTOS kernel system timer counter.
+/// \return RTOS kernel system timer as 32-bit value 
+uint32_t osKernelSysTick (void);
+
+/// The RTOS kernel system timer frequency in Hz.
+/// \note Reflects the system timer setting and is typically defined in a configuration file.
+#define osKernelSysTickFrequency os_tickfreq
+
+/// Convert a microseconds value to a RTOS kernel system timer value.
+/// \param         microsec     time value in microseconds.
+/// \return time value normalized to the \ref osKernelSysTickFrequency
+/*
+#define osKernelSysTickMicroSec(microsec) (((uint64_t)microsec * (osKernelSysTickFrequency)) / 1000000)
+*/
+#define osKernelSysTickMicroSec(microsec) ((microsec * os_tickus_i) + ((microsec * os_tickus_f) >> 16))
+
+#endif    // System Timer available
+
+//  ==== Thread Management ====
+
+/// Create a Thread Definition with function, priority, and stack requirements.
+/// \param         name         name of the thread function.
+/// \param         priority     initial priority of the thread function.
+/// \param         instances    number of possible thread instances.
+/// \param         stacksz      stack size (in bytes) requirements for the thread function.
+///       macro body is implementation specific in every CMSIS-RTOS.
+#if defined (osObjectsExternal)  // object is external
+#define osThreadDef(name, priority, instances, stacksz)  \
+extern const osThreadDef_t os_thread_def_##name
+#else                            // define the object
+#ifdef __MBED_CMSIS_RTOS_CM
+#define osThreadDef(name, priority, stacksz)  \
+uint32_t os_thread_def_stack_##name [stacksz / sizeof(uint32_t)]; \
+const osThreadDef_t os_thread_def_##name = \
+{ (name), (priority), 1, (stacksz), (os_thread_def_stack_##name) }
+#else
+#define osThreadDef(name, priority, instances, stacksz)  \
+const osThreadDef_t os_thread_def_##name = \
+{ (name), (priority), (instances), (stacksz)  }
+#endif
+#endif
+
+/// Access a Thread definition.
+/// \param         name          name of the thread definition object.
+///       macro body is implementation specific in every CMSIS-RTOS.
+#define osThread(name)  \
+&os_thread_def_##name
+
+/// Create a thread and add it to Active Threads and set it to state READY.
+/// \param[in]     thread_def    thread definition referenced with \ref osThread.
+/// \param[in]     argument      pointer that is passed to the thread function as start argument.
+/// \return thread ID for reference by other functions or NULL in case of error.
+osThreadId osThreadCreate (const osThreadDef_t *thread_def, void *argument);
+
+osThreadId osThreadContextCreate (const osThreadDef_t *thread_def, void *argument, void *context);
+
+/// Return the thread ID of the current running thread.
+/// \return thread ID for reference by other functions or NULL in case of error.
+osThreadId osThreadGetId (void);
+
+/// Terminate execution of a thread and remove it from Active Threads.
+/// \param[in]     thread_id   thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \return status code that indicates the execution status of the function.
+osStatus osThreadTerminate (osThreadId thread_id);
+
+/// Pass control to next thread that is in state \b READY.
+/// \return status code that indicates the execution status of the function.
+osStatus osThreadYield (void);
+
+/// Change priority of an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \param[in]     priority      new priority value for the thread function.
+/// \return status code that indicates the execution status of the function.
+osStatus osThreadSetPriority (osThreadId thread_id, osPriority priority);
+
+/// Get current priority of an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \return current priority value of the thread function.
+osPriority osThreadGetPriority (osThreadId thread_id);
+
+#ifdef __MBED_CMSIS_RTOS_CM
+/// Get current thread state.
+uint8_t osThreadGetState (osThreadId thread_id);
+#endif
+
+/// Get into from an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \param[in]     info          information to read.
+/// \return current state of the thread function.
+/// \return requested info that includes the status code.
+os_InRegs osEvent _osThreadGetInfo(osThreadId thread_id, osThreadInfo info);
+
+//  ==== Generic Wait Functions ====
+
+/// Wait for Timeout (Time Delay).
+/// \param[in]     millisec      \ref CMSIS_RTOS_TimeOutValue "Time delay" value
+/// \return status code that indicates the execution status of the function.
+osStatus osDelay (uint32_t millisec);
+
+#if (defined (osFeature_Wait)  &&  (osFeature_Wait != 0))     // Generic Wait available
+
+/// Wait for Signal, Message, Mail, or Timeout.
+/// \param[in] millisec          \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out
+/// \return event that contains signal, message, or mail information or error code.
+os_InRegs osEvent osWait (uint32_t millisec);
+
+#endif  // Generic Wait available
+
+
+//  ==== Timer Management Functions ====
+/// Define a Timer object.
+/// \param         name          name of the timer object.
+/// \param         function      name of the timer call back function.
+#if defined (osObjectsExternal)  // object is external
+#define osTimerDef(name, function)  \
+extern const osTimerDef_t os_timer_def_##name
+#else                            // define the object
+#define osTimerDef(name, function)  \
+uint32_t os_timer_cb_##name[6]; \
+const osTimerDef_t os_timer_def_##name = \
+{ (function), (os_timer_cb_##name) }
+#endif
+
+/// Access a Timer definition.
+/// \param         name          name of the timer object.
+#define osTimer(name) \
+&os_timer_def_##name
+
+/// Create a timer.
+/// \param[in]     timer_def     timer object referenced with \ref osTimer.
+/// \param[in]     type          osTimerOnce for one-shot or osTimerPeriodic for periodic behavior.
+/// \param[in]     argument      argument to the timer call back function.
+/// \return timer ID for reference by other functions or NULL in case of error.
+osTimerId osTimerCreate (const osTimerDef_t *timer_def, os_timer_type type, void *argument);
+
+/// Start or restart a timer.
+/// \param[in]     timer_id      timer ID obtained by \ref osTimerCreate.
+/// \param[in]     millisec      \ref CMSIS_RTOS_TimeOutValue "Time delay" value of the timer.
+/// \return status code that indicates the execution status of the function.
+osStatus osTimerStart (osTimerId timer_id, uint32_t millisec);
+
+/// Stop the timer.
+/// \param[in]     timer_id      timer ID obtained by \ref osTimerCreate.
+/// \return status code that indicates the execution status of the function.
+osStatus osTimerStop (osTimerId timer_id);
+
+/// Delete a timer that was created by \ref osTimerCreate.
+/// \param[in]     timer_id      timer ID obtained by \ref osTimerCreate.
+/// \return status code that indicates the execution status of the function.
+osStatus osTimerDelete (osTimerId timer_id);
+
+
+//  ==== Signal Management ====
+
+/// Set the specified Signal Flags of an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \param[in]     signals       specifies the signal flags of the thread that should be set.
+/// \return previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters.
+int32_t osSignalSet (osThreadId thread_id, int32_t signals);
+
+/// Clear the specified Signal Flags of an active thread.
+/// \param[in]     thread_id     thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
+/// \param[in]     signals       specifies the signal flags of the thread that shall be cleared.
+/// \return previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters or call from ISR.
+int32_t osSignalClear (osThreadId thread_id, int32_t signals);
+
+/// Wait for one or more Signal Flags to become signaled for the current \b RUNNING thread.
+/// \param[in]     signals       wait until all specified signal flags set or 0 for any single signal flag.
+/// \param[in]     millisec      \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out.
+/// \return event flag information or error code.
+os_InRegs osEvent osSignalWait (int32_t signals, uint32_t millisec);
+
+
+//  ==== Mutex Management ====
+
+/// Define a Mutex.
+/// \param         name          name of the mutex object.
+#if defined (osObjectsExternal)  // object is external
+#define osMutexDef(name)  \
+extern const osMutexDef_t os_mutex_def_##name
+#else                            // define the object
+#define osMutexDef(name)  \
+uint32_t os_mutex_cb_##name[4] = { 0 }; \
+const osMutexDef_t os_mutex_def_##name = { (os_mutex_cb_##name) }
+#endif
+
+/// Access a Mutex definition.
+/// \param         name          name of the mutex object.
+#define osMutex(name)  \
+&os_mutex_def_##name
+
+/// Create and Initialize a Mutex object.
+/// \param[in]     mutex_def     mutex definition referenced with \ref osMutex.
+/// \return mutex ID for reference by other functions or NULL in case of error.
+osMutexId osMutexCreate (const osMutexDef_t *mutex_def);
+
+/// Wait until a Mutex becomes available.
+/// \param[in]     mutex_id      mutex ID obtained by \ref osMutexCreate.
+/// \param[in]     millisec      \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out.
+/// \return status code that indicates the execution status of the function.
+osStatus osMutexWait (osMutexId mutex_id, uint32_t millisec);
+
+/// Release a Mutex that was obtained by \ref osMutexWait.
+/// \param[in]     mutex_id      mutex ID obtained by \ref osMutexCreate.
+/// \return status code that indicates the execution status of the function.
+osStatus osMutexRelease (osMutexId mutex_id);
+
+/// Delete a Mutex that was created by \ref osMutexCreate.
+/// \param[in]     mutex_id      mutex ID obtained by \ref osMutexCreate.
+/// \return status code that indicates the execution status of the function.
+osStatus osMutexDelete (osMutexId mutex_id);
+
+
+//  ==== Semaphore Management Functions ====
+
+#if (defined (osFeature_Semaphore)  &&  (osFeature_Semaphore != 0))     // Semaphore available
+
+/// Define a Semaphore object.
+/// \param         name          name of the semaphore object.
+#if defined (osObjectsExternal)  // object is external
+#define osSemaphoreDef(name)  \
+extern const osSemaphoreDef_t os_semaphore_def_##name
+#else                            // define the object
+#define osSemaphoreDef(name)  \
+uint32_t os_semaphore_cb_##name[2] = { 0 }; \
+const osSemaphoreDef_t os_semaphore_def_##name = { (os_semaphore_cb_##name) }
+#endif
+
+/// Access a Semaphore definition.
+/// \param         name          name of the semaphore object.
+#define osSemaphore(name)  \
+&os_semaphore_def_##name
+
+/// Create and Initialize a Semaphore object used for managing resources.
+/// \param[in]     semaphore_def semaphore definition referenced with \ref osSemaphore.
+/// \param[in]     count         number of available resources.
+/// \return semaphore ID for reference by other functions or NULL in case of error.
+osSemaphoreId osSemaphoreCreate (const osSemaphoreDef_t *semaphore_def, int32_t count);
+
+/// Wait until a Semaphore token becomes available.
+/// \param[in]     semaphore_id  semaphore object referenced with \ref osSemaphoreCreate.
+/// \param[in]     millisec      \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out.
+/// \return number of available tokens, or -1 in case of incorrect parameters.
+int32_t osSemaphoreWait (osSemaphoreId semaphore_id, uint32_t millisec);
+
+/// Release a Semaphore token.
+/// \param[in]     semaphore_id  semaphore object referenced with \ref osSemaphoreCreate.
+/// \return status code that indicates the execution status of the function.
+osStatus osSemaphoreRelease (osSemaphoreId semaphore_id);
+
+/// Delete a Semaphore that was created by \ref osSemaphoreCreate.
+/// \param[in]     semaphore_id  semaphore object referenced with \ref osSemaphoreCreate.
+/// \return status code that indicates the execution status of the function.
+osStatus osSemaphoreDelete (osSemaphoreId semaphore_id);
+
+#endif     // Semaphore available
+
+
+//  ==== Memory Pool Management Functions ====
+
+#if (defined (osFeature_Pool)  &&  (osFeature_Pool != 0))  // Memory Pool Management available
+
+/// \brief Define a Memory Pool.
+/// \param         name          name of the memory pool.
+/// \param         no            maximum number of blocks (objects) in the memory pool.
+/// \param         type          data type of a single block (object).
+#if defined (osObjectsExternal)  // object is external
+#define osPoolDef(name, no, type)   \
+extern const osPoolDef_t os_pool_def_##name
+#else                            // define the object
+#define osPoolDef(name, no, type)   \
+uint32_t os_pool_m_##name[3+((sizeof(type)+3)/4)*(no)]; \
+const osPoolDef_t os_pool_def_##name = \
+{ (no), sizeof(type), (os_pool_m_##name) }
+#endif
+
+/// \brief Access a Memory Pool definition.
+/// \param         name          name of the memory pool
+#define osPool(name) \
+&os_pool_def_##name
+
+/// Create and Initialize a memory pool.
+/// \param[in]     pool_def      memory pool definition referenced with \ref osPool.
+/// \return memory pool ID for reference by other functions or NULL in case of error.
+osPoolId osPoolCreate (const osPoolDef_t *pool_def);
+
+/// Allocate a memory block from a memory pool.
+/// \param[in]     pool_id       memory pool ID obtain referenced with \ref osPoolCreate.
+/// \return address of the allocated memory block or NULL in case of no memory available.
+void *osPoolAlloc (osPoolId pool_id);
+
+/// Allocate a memory block from a memory pool and set memory block to zero.
+/// \param[in]     pool_id       memory pool ID obtain referenced with \ref osPoolCreate.
+/// \return address of the allocated memory block or NULL in case of no memory available.
+void *osPoolCAlloc (osPoolId pool_id);
+
+/// Return an allocated memory block back to a specific memory pool.
+/// \param[in]     pool_id       memory pool ID obtain referenced with \ref osPoolCreate.
+/// \param[in]     block         address of the allocated memory block that is returned to the memory pool.
+/// \return status code that indicates the execution status of the function.
+osStatus osPoolFree (osPoolId pool_id, void *block);
+
+#endif   // Memory Pool Management available
+
+
+//  ==== Message Queue Management Functions ====
+
+#if (defined (osFeature_MessageQ)  &&  (osFeature_MessageQ != 0))     // Message Queues available
+
+/// \brief Create a Message Queue Definition.
+/// \param         name          name of the queue.
+/// \param         queue_sz      maximum number of messages in the queue.
+/// \param         type          data type of a single message element (for debugger).
+#if defined (osObjectsExternal)  // object is external
+#define osMessageQDef(name, queue_sz, type)   \
+extern const osMessageQDef_t os_messageQ_def_##name
+#else                            // define the object
+#define osMessageQDef(name, queue_sz, type)   \
+uint32_t os_messageQ_q_##name[4+(queue_sz)] = { 0 }; \
+const osMessageQDef_t os_messageQ_def_##name = \
+{ (queue_sz), (os_messageQ_q_##name) }
+#endif
+
+/// \brief Access a Message Queue Definition.
+/// \param         name          name of the queue
+#define osMessageQ(name) \
+&os_messageQ_def_##name
+
+/// Create and Initialize a Message Queue.
+/// \param[in]     queue_def     queue definition referenced with \ref osMessageQ.
+/// \param[in]     thread_id     thread ID (obtained by \ref osThreadCreate or \ref osThreadGetId) or NULL.
+/// \return message queue ID for reference by other functions or NULL in case of error.
+osMessageQId osMessageCreate (const osMessageQDef_t *queue_def, osThreadId thread_id);
+
+/// Put a Message to a Queue.
+/// \param[in]     queue_id      message queue ID obtained with \ref osMessageCreate.
+/// \param[in]     info          message information.
+/// \param[in]     millisec      \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out.
+/// \return status code that indicates the execution status of the function.
+osStatus osMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec);
+
+/// Get a Message or Wait for a Message from a Queue.
+/// \param[in]     queue_id      message queue ID obtained with \ref osMessageCreate.
+/// \param[in]     millisec      \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out.
+/// \return event information that includes status code.
+os_InRegs osEvent osMessageGet (osMessageQId queue_id, uint32_t millisec);
+
+#endif     // Message Queues available
+
+
+//  ==== Mail Queue Management Functions ====
+
+#if (defined (osFeature_MailQ)  &&  (osFeature_MailQ != 0))     // Mail Queues available
+
+/// \brief Create a Mail Queue Definition.
+/// \param         name          name of the queue
+/// \param         queue_sz      maximum number of messages in queue
+/// \param         type          data type of a single message element
+#if defined (osObjectsExternal)  // object is external
+#define osMailQDef(name, queue_sz, type) \
+extern const osMailQDef_t os_mailQ_def_##name
+#else                            // define the object
+#define osMailQDef(name, queue_sz, type) \
+uint32_t os_mailQ_q_##name[4+(queue_sz)] = { 0 }; \
+uint32_t os_mailQ_m_##name[3+((sizeof(type)+3)/4)*(queue_sz)]; \
+void *   os_mailQ_p_##name[2] = { (os_mailQ_q_##name), os_mailQ_m_##name }; \
+const osMailQDef_t os_mailQ_def_##name =  \
+{ (queue_sz), sizeof(type), (os_mailQ_p_##name) }
+#endif
+
+/// \brief Access a Mail Queue Definition.
+/// \param         name          name of the queue
+#define osMailQ(name)  \
+&os_mailQ_def_##name
+
+/// Create and Initialize mail queue.
+/// \param[in]     queue_def     reference to the mail queue definition obtain with \ref osMailQ
+/// \param[in]     thread_id     thread ID (obtained by \ref osThreadCreate or \ref osThreadGetId) or NULL.
+/// \return mail queue ID for reference by other functions or NULL in case of error.
+osMailQId osMailCreate (const osMailQDef_t *queue_def, osThreadId thread_id);
+
+/// Allocate a memory block from a mail.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     millisec      \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out
+/// \return pointer to memory block that can be filled with mail or NULL in case of error.
+void *osMailAlloc (osMailQId queue_id, uint32_t millisec);
+
+/// Allocate a memory block from a mail and set memory block to zero.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     millisec      \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out
+/// \return pointer to memory block that can be filled with mail or NULL in case of error.
+void *osMailCAlloc (osMailQId queue_id, uint32_t millisec);
+
+/// Put a mail to a queue.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     mail          memory block previously allocated with \ref osMailAlloc or \ref osMailCAlloc.
+/// \return status code that indicates the execution status of the function.
+osStatus osMailPut (osMailQId queue_id, void *mail);
+
+/// Get a mail from a queue.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     millisec      \ref CMSIS_RTOS_TimeOutValue or 0 in case of no time-out
+/// \return event that contains mail information or error code.
+os_InRegs osEvent osMailGet (osMailQId queue_id, uint32_t millisec);
+
+/// Free a memory block from a mail.
+/// \param[in]     queue_id      mail queue ID obtained with \ref osMailCreate.
+/// \param[in]     mail          pointer to the memory block that was obtained with \ref osMailGet.
+/// \return status code that indicates the execution status of the function.
+osStatus osMailFree (osMailQId queue_id, void *mail);
+
+#endif  // Mail Queues available
+
+
+//  ==== Thread Enumeration Functions ====
+
+#if (defined (osFeature_ThreadEnum)  &&  (osFeature_ThreadEnum != 0))     // Thread enumeration available
+
+/// Start a thread enumeration.
+/// \return an enumeration ID or NULL on error.
+osThreadEnumId _osThreadsEnumStart(void);
+
+/// Get the next task ID in the enumeration.
+/// \return a thread ID or NULL on if the end of the enumeration has been reached.
+osThreadId _osThreadEnumNext(osThreadEnumId enum_id);
+
+/// Free the enumeration structure.
+/// \param[in]     enum_id       pointer to the enumeration ID that was obtained with \ref _osThreadsEnumStart.
+/// \return status code that indicates the execution status of the function.
+osStatus _osThreadEnumFree(osThreadEnumId enum_id);
+
+#endif  // Thread Enumeration available
+
+
+//  ==== RTX Extensions ====
+
+/// Suspend the RTX task scheduler.
+/// \return number of ticks, for how long the system can sleep or power-down.
+uint32_t os_suspend (void);
+
+/// Resume the RTX task scheduler
+/// \param[in]     sleep_time    specifies how long the system was in sleep or power-down mode.
+void os_resume (uint32_t sleep_time);
+
+
+#ifdef  __cplusplus
+}
+#endif
+
+#endif  // _CMSIS_OS_H
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_CMSIS.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_CMSIS.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,2344 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    rt_CMSIS.c
+ *      Purpose: CMSIS RTOS API
+ *      Rev.:    V4.80
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#define __CMSIS_GENERIC
+
+#if defined (__CORTEX_M4) || defined (__CORTEX_M4F)
+  #include "core_cm4.h"
+#elif defined (__CORTEX_M7) || defined (__CORTEX_M7F)
+  #include "core_cm7.h"
+#elif defined (__CORTEX_M3)
+  #include "core_cm3.h"
+#elif defined (__CORTEX_M0)
+  #include "core_cm0.h"
+#elif defined (__CORTEX_M0PLUS)
+  #include "core_cm0plus.h"
+#else
+  #error "Missing __CORTEX_Mx definition"
+#endif
+
+// This affects cmsis_os only, as it's not used anywhere else. This was left by kernel team
+// to suppress the warning in rt_tid2ptcb about incompatible pointer assignment.
+#define os_thread_cb OS_TCB
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_Task.h"
+#include "rt_Event.h"
+#include "rt_List.h"
+#include "rt_Time.h"
+#include "rt_Mutex.h"
+#include "rt_Semaphore.h"
+#include "rt_Mailbox.h"
+#include "rt_MemBox.h"
+#include "rt_Memory.h"
+#include "rt_HAL_CM.h"
+#include "rt_OsEventObserver.h"
+
+#include "cmsis_os.h"
+
+#if (osFeature_Signals != 16)
+#error Invalid "osFeature_Signals" value!
+#endif
+#if (osFeature_Semaphore > 65535)
+#error Invalid "osFeature_Semaphore" value!
+#endif
+#if (osFeature_Wait != 0)
+#error osWait not supported!
+#endif
+
+
+// ==== Enumeration, structures, defines ====
+
+// Service Calls defines
+
+#if defined (__CC_ARM)          /* ARM Compiler */
+
+#define __NO_RETURN __declspec(noreturn)
+
+#define osEvent_type       osEvent
+#define osEvent_ret_status ret
+#define osEvent_ret_value  ret
+#define osEvent_ret_msg    ret
+#define osEvent_ret_mail   ret
+
+#define osCallback_type    osCallback
+#define osCallback_ret     ret
+
+#define SVC_0_1(f,t,...)                                                       \
+__svc_indirect(0) t  _##f (t(*)());                                            \
+                  t     f (void);                                              \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (void) {                                             \
+  return _##f(f);                                                              \
+}
+
+#define SVC_1_0(f,t,t1,...)                                                    \
+__svc_indirect(0) t  _##f (t(*)(t1),t1);                                       \
+                  t     f (t1 a1);                                             \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (t1 a1) {                                            \
+  _##f(f,a1);                                                                  \
+}
+
+#define SVC_1_1(f,t,t1,...)                                                    \
+__svc_indirect(0) t  _##f (t(*)(t1),t1);                                       \
+                  t     f (t1 a1);                                             \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (t1 a1) {                                            \
+  return _##f(f,a1);                                                           \
+}
+
+#define SVC_2_1(f,t,t1,t2,...)                                                 \
+__svc_indirect(0) t  _##f (t(*)(t1,t2),t1,t2);                                 \
+                  t     f (t1 a1, t2 a2);                                      \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (t1 a1, t2 a2) {                                     \
+  return _##f(f,a1,a2);                                                        \
+}
+
+#define SVC_3_1(f,t,t1,t2,t3,...)                                              \
+__svc_indirect(0) t  _##f (t(*)(t1,t2,t3),t1,t2,t3);                           \
+                  t     f (t1 a1, t2 a2, t3 a3);                               \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (t1 a1, t2 a2, t3 a3) {                              \
+  return _##f(f,a1,a2,a3);                                                     \
+}
+
+#define SVC_4_1(f,t,t1,t2,t3,t4,...)                                           \
+__svc_indirect(0) t  _##f (t(*)(t1,t2,t3,t4),t1,t2,t3,t4);                     \
+                  t     f (t1 a1, t2 a2, t3 a3, t4 a4);                        \
+__attribute__((always_inline))                                                 \
+static __inline   t __##f (t1 a1, t2 a2, t3 a3, t4 a4) {                       \
+  return _##f(f,a1,a2,a3,a4);                                                  \
+}
+
+#define SVC_1_2 SVC_1_1 
+#define SVC_1_3 SVC_1_1 
+#define SVC_2_3 SVC_2_1 
+
+#elif defined (__GNUC__)        /* GNU Compiler */
+
+#define __NO_RETURN __attribute__((noreturn))
+
+typedef uint32_t __attribute__((vector_size(8)))  ret64;
+typedef uint32_t __attribute__((vector_size(16))) ret128;
+
+#define RET_pointer    __r0
+#define RET_int32_t    __r0
+#define RET_uint32_t   __r0
+#define RET_osStatus   __r0
+#define RET_osPriority __r0
+#define RET_osEvent    {(osStatus)__r0, {(uint32_t)__r1}, {(void *)__r2}}
+#define RET_osCallback {(void *)__r0, (void *)__r1}
+
+#define osEvent_type       __attribute__((pcs("aapcs"))) ret128
+#define osEvent_ret_status (ret128){ret.status}
+#define osEvent_ret_value  (ret128){ret.status, ret.value.v}
+#define osEvent_ret_msg    (ret128){ret.status, ret.value.v, (uint32_t)ret.def.message_id}
+#define osEvent_ret_mail   (ret128){ret.status, ret.value.v, (uint32_t)ret.def.mail_id}
+
+#define osCallback_type    __attribute__((pcs("aapcs"))) ret64
+#define osCallback_ret     (ret64) {(uint32_t)ret.fp, (uint32_t)ret.arg}
+
+#define SVC_ArgN(n) \
+  register int __r##n __asm("r"#n);
+
+#define SVC_ArgR(n,t,a) \
+  register t   __r##n __asm("r"#n) = a;
+
+#define SVC_Arg0()                                                             \
+  SVC_ArgN(0)                                                                  \
+  SVC_ArgN(1)                                                                  \
+  SVC_ArgN(2)                                                                  \
+  SVC_ArgN(3)
+
+#define SVC_Arg1(t1)                                                           \
+  SVC_ArgR(0,t1,a1)                                                            \
+  SVC_ArgN(1)                                                                  \
+  SVC_ArgN(2)                                                                  \
+  SVC_ArgN(3)
+
+#define SVC_Arg2(t1,t2)                                                        \
+  SVC_ArgR(0,t1,a1)                                                            \
+  SVC_ArgR(1,t2,a2)                                                            \
+  SVC_ArgN(2)                                                                  \
+  SVC_ArgN(3)
+
+#define SVC_Arg3(t1,t2,t3)                                                     \
+  SVC_ArgR(0,t1,a1)                                                            \
+  SVC_ArgR(1,t2,a2)                                                            \
+  SVC_ArgR(2,t3,a3)                                                            \
+  SVC_ArgN(3)
+
+#define SVC_Arg4(t1,t2,t3,t4)                                                  \
+  SVC_ArgR(0,t1,a1)                                                            \
+  SVC_ArgR(1,t2,a2)                                                            \
+  SVC_ArgR(2,t3,a3)                                                            \
+  SVC_ArgR(3,t4,a4)
+
+#if (defined (__CORTEX_M0)) || defined (__CORTEX_M0PLUS)
+#define SVC_Call(f)                                                            \
+  __asm volatile                                                               \
+  (                                                                            \
+    "ldr r7,="#f"\n\t"                                                         \
+    "mov r12,r7\n\t"                                                           \
+    "svc 0"                                                                    \
+    :               "=r" (__r0), "=r" (__r1), "=r" (__r2), "=r" (__r3)         \
+    :                "r" (__r0),  "r" (__r1),  "r" (__r2),  "r" (__r3)         \
+    : "r7", "r12", "lr", "cc"                                                  \
+  );
+#else
+#define SVC_Call(f)                                                            \
+  __asm volatile                                                               \
+  (                                                                            \
+    "ldr r12,="#f"\n\t"                                                        \
+    "svc 0"                                                                    \
+    :               "=r" (__r0), "=r" (__r1), "=r" (__r2), "=r" (__r3)         \
+    :                "r" (__r0),  "r" (__r1),  "r" (__r2),  "r" (__r3)         \
+    : "r12", "lr", "cc"                                                        \
+  );
+#endif
+
+#define SVC_0_1(f,t,rv)                                                        \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (void) {                                                \
+  SVC_Arg0();                                                                  \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_1_0(f,t,t1)                                                        \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (t1 a1) {                                               \
+  SVC_Arg1(t1);                                                                \
+  SVC_Call(f);                                                                 \
+}
+
+#define SVC_1_1(f,t,t1,rv)                                                     \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (t1 a1) {                                               \
+  SVC_Arg1(t1);                                                                \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_2_1(f,t,t1,t2,rv)                                                  \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (t1 a1, t2 a2) {                                        \
+  SVC_Arg2(t1,t2);                                                             \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_3_1(f,t,t1,t2,t3,rv)                                               \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (t1 a1, t2 a2, t3 a3) {                                 \
+  SVC_Arg3(t1,t2,t3);                                                          \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_4_1(f,t,t1,t2,t3,t4,rv)                                            \
+__attribute__((always_inline))                                                 \
+static inline  t __##f (t1 a1, t2 a2, t3 a3, t4 a4) {                          \
+  SVC_Arg4(t1,t2,t3,t4);                                                       \
+  SVC_Call(f);                                                                 \
+  return (t) rv;                                                               \
+}
+
+#define SVC_1_2 SVC_1_1 
+#define SVC_1_3 SVC_1_1 
+#define SVC_2_3 SVC_2_1 
+
+#elif defined (__ICCARM__)      /* IAR Compiler */
+
+#define __NO_RETURN __noreturn
+
+#define osEvent_type       osEvent
+#define osEvent_ret_status ret
+#define osEvent_ret_value  ret
+#define osEvent_ret_msg    ret
+#define osEvent_ret_mail   ret
+
+#define osCallback_type    osCallback
+#define osCallback_ret     ret
+
+#define RET_osEvent     osEvent
+#define RET_osCallback  osCallback
+
+#define SVC_Setup(f)                                                           \
+  __asm(                                                                       \
+    "mov r12,%0\n"                                                             \
+    :: "r"(&f): "r0", "r1", "r2", "r3", "r12"                                  \
+  );
+
+#define SVC_Ret3()                                                             \
+  __asm(                                                                       \
+    "ldr r0,[sp,#0]\n"                                                         \
+    "ldr r1,[sp,#4]\n"                                                         \
+    "ldr r2,[sp,#8]\n"                                                         \
+  );
+
+#define SVC_0_1(f,t,...)                                                       \
+t f (void);                                                                    \
+_Pragma("swi_number=0") __swi t _##f (void);                                   \
+static inline t __##f (void) {                                                 \
+  SVC_Setup(f);                                                                \
+  return _##f();                                                               \
+}
+
+#define SVC_1_0(f,t,t1,...)                                                    \
+t f (t1 a1);                                                                   \
+_Pragma("swi_number=0") __swi t _##f (t1 a1);                                  \
+static inline t __##f (t1 a1) {                                                \
+  SVC_Setup(f);                                                                \
+  _##f(a1);                                                                    \
+}
+
+#define SVC_1_1(f,t,t1,...)                                                    \
+t f (t1 a1);                                                                   \
+_Pragma("swi_number=0") __swi t _##f (t1 a1);                                  \
+static inline t __##f (t1 a1) {                                                \
+  SVC_Setup(f);                                                                \
+  return _##f(a1);                                                             \
+}
+
+#define SVC_2_1(f,t,t1,t2,...)                                                 \
+t f (t1 a1, t2 a2);                                                            \
+_Pragma("swi_number=0") __swi t _##f (t1 a1, t2 a2);                           \
+static inline t __##f (t1 a1, t2 a2) {                                         \
+  SVC_Setup(f);                                                                \
+  return _##f(a1,a2);                                                          \
+}
+
+#define SVC_3_1(f,t,t1,t2,t3,...)                                              \
+t f (t1 a1, t2 a2, t3 a3);                                                     \
+_Pragma("swi_number=0") __swi t _##f (t1 a1, t2 a2, t3 a3);                    \
+static inline t __##f (t1 a1, t2 a2, t3 a3) {                                  \
+  SVC_Setup(f);                                                                \
+  return _##f(a1,a2,a3);                                                       \
+}
+
+#define SVC_4_1(f,t,t1,t2,t3,t4,...)                                           \
+t f (t1 a1, t2 a2, t3 a3, t4 a4);                                              \
+_Pragma("swi_number=0") __swi t _##f (t1 a1, t2 a2, t3 a3, t4 a4);             \
+static inline t __##f (t1 a1, t2 a2, t3 a3, t4 a4) {                           \
+  SVC_Setup(f);                                                                \
+  return _##f(a1,a2,a3,a4);                                                    \
+}
+
+#define SVC_1_2 SVC_1_1
+#define SVC_1_3 SVC_1_1
+#define SVC_2_3 SVC_2_1
+
+#endif
+
+
+// Callback structure
+typedef struct {
+  void *fp;             // Function pointer
+  void *arg;            // Function argument
+} osCallback;
+
+
+// OS Section definitions
+#ifdef OS_SECTIONS_LINK_INFO
+extern const uint32_t  os_section_id$$Base;
+extern const uint32_t  os_section_id$$Limit;
+#endif
+
+#ifndef __MBED_CMSIS_RTOS_CM
+// OS Stack Memory for Threads definitions
+extern       uint64_t  os_stack_mem[];
+extern const uint32_t  os_stack_sz;
+#endif
+
+// OS Timers external resources
+extern const osThreadDef_t   os_thread_def_osTimerThread;
+extern       osThreadId      osThreadId_osTimerThread;
+extern const osMessageQDef_t os_messageQ_def_osTimerMessageQ;
+extern       osMessageQId    osMessageQId_osTimerMessageQ;
+
+// Thread creation and destruction
+osMutexDef(osThreadMutex);
+osMutexId osMutexId_osThreadMutex;
+void sysThreadTerminate(osThreadId id);
+
+// ==== Helper Functions ====
+
+/// Convert timeout in millisec to system ticks
+static uint16_t rt_ms2tick (uint32_t millisec) {
+  uint32_t tick;
+
+  if (millisec == 0U) { return 0x0U; }                  // No timeout
+  if (millisec == osWaitForever) { return 0xFFFFU; }    // Indefinite timeout
+  if (millisec > 4000000U) { return 0xFFFEU; }          // Max ticks supported
+
+  tick = ((1000U * millisec) + os_clockrate - 1U)  / os_clockrate;
+  if (tick > 0xFFFEU) { return 0xFFFEU; }
+  
+  return (uint16_t)tick;
+}
+
+/// Convert Thread ID to TCB pointer
+P_TCB rt_tid2ptcb (osThreadId thread_id) {
+  P_TCB ptcb;
+
+  if (thread_id == NULL) { return NULL; }
+
+  if ((uint32_t)thread_id & 3U) { return NULL; }
+
+#ifdef OS_SECTIONS_LINK_INFO
+  if ((os_section_id$$Base != 0U) && (os_section_id$$Limit != 0U)) {
+    if (thread_id  < (osThreadId)os_section_id$$Base)  { return NULL; }
+    if (thread_id >= (osThreadId)os_section_id$$Limit) { return NULL; }
+  }
+#endif
+
+  ptcb = thread_id;
+
+  if (ptcb->cb_type != TCB) { return NULL; }
+
+  return ptcb;
+}
+
+/// Convert ID pointer to Object pointer
+static void *rt_id2obj (void *id) {
+
+  if ((uint32_t)id & 3U) { return NULL; }
+
+#ifdef OS_SECTIONS_LINK_INFO
+  if ((os_section_id$$Base != 0U) && (os_section_id$$Limit != 0U)) {
+    if (id  < (void *)os_section_id$$Base)  { return NULL; }
+    if (id >= (void *)os_section_id$$Limit) { return NULL; }
+  }
+#endif
+
+  return id;
+}
+
+
+// ==== Kernel Control ====
+
+uint8_t os_initialized;                         // Kernel Initialized flag
+uint8_t os_running;                             // Kernel Running flag
+
+// Kernel Control Service Calls declarations
+SVC_0_1(svcKernelInitialize, osStatus, RET_osStatus)
+SVC_0_1(svcKernelStart,      osStatus, RET_osStatus)
+SVC_0_1(svcKernelRunning,    int32_t,  RET_int32_t)
+SVC_0_1(svcKernelSysTick,    uint32_t, RET_uint32_t)
+
+static void  sysThreadError   (osStatus status);
+osThreadId   svcThreadCreate  (const osThreadDef_t *thread_def, void *argument, void *context);
+osMessageQId svcMessageCreate (const osMessageQDef_t *queue_def, osThreadId thread_id);
+
+// Kernel Control Service Calls
+
+/// Initialize the RTOS Kernel for creating objects
+osStatus svcKernelInitialize (void) {
+#ifdef __MBED_CMSIS_RTOS_CM
+  if (!os_initialized) {
+    rt_sys_init();                              // RTX System Initialization
+  }
+#else
+  uint32_t ret;
+
+  if (os_initialized == 0U) {
+
+    // Init Thread Stack Memory (must be 8-byte aligned)
+    if (((uint32_t)os_stack_mem & 7U) != 0U) { return osErrorNoMemory; }
+    ret = rt_init_mem(os_stack_mem, os_stack_sz);
+    if (ret != 0U) { return osErrorNoMemory; }
+
+    rt_sys_init();                              // RTX System Initialization
+  }
+#endif
+
+  os_tsk.run->prio = 255U;                      // Highest priority
+
+  if (os_initialized == 0U) {
+    // Create OS Timers resources (Message Queue & Thread)
+    osMessageQId_osTimerMessageQ = svcMessageCreate (&os_messageQ_def_osTimerMessageQ, NULL);
+    osThreadId_osTimerThread = svcThreadCreate(&os_thread_def_osTimerThread, NULL, NULL);
+    // Initialize thread mutex
+    osMutexId_osThreadMutex = osMutexCreate(osMutex(osThreadMutex));
+  }
+
+  sysThreadError(osOK);
+
+  os_initialized = 1U;
+  os_running = 0U;
+
+  return osOK;
+}
+
+/// Start the RTOS Kernel
+osStatus svcKernelStart (void) {
+
+  if (os_running) { return osOK; }
+
+  rt_tsk_prio(0U, os_tsk.run->prio_base);       // Restore priority
+  if (os_tsk.run->task_id == 0xFFU) {           // Idle Thread
+    __set_PSP(os_tsk.run->tsk_stack + (8U*4U)); // Setup PSP
+  }
+  if (os_tsk.new_tsk == NULL) {                     // Force context switch
+    os_tsk.new_tsk = os_tsk.run;
+    os_tsk.run = NULL;
+  }
+
+  rt_sys_start();
+
+  os_running = 1U;
+
+  return osOK;
+}
+
+/// Check if the RTOS kernel is already started
+int32_t svcKernelRunning (void) {
+  return (int32_t)os_running;
+}
+
+/// Get the RTOS kernel system timer counter
+uint32_t svcKernelSysTick (void) {
+  uint32_t tick, tick0;
+
+  tick = os_tick_val();
+  if (os_tick_ovf()) {
+    tick0 = os_tick_val();
+    if (tick0 < tick) { tick = tick0; }
+    tick += (os_trv + 1U) * (os_time + 1U);
+  } else {
+    tick += (os_trv + 1U) *  os_time;
+  }
+
+  return tick;
+}
+
+// Kernel Control Public API
+
+/// Initialize the RTOS Kernel for creating objects
+osStatus osKernelInitialize (void) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return osErrorISR;                          // Not allowed in ISR
+  }
+  if ((__get_CONTROL() & 1U) == 0U) {           // Privileged mode
+    return   svcKernelInitialize();
+  } else {
+    return __svcKernelInitialize();
+  }
+}
+
+/// Start the RTOS Kernel
+osStatus osKernelStart (void) {
+  uint32_t stack[8];
+
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return osErrorISR;                          // Not allowed in ISR
+  }
+
+  /* Call the pre-start event (from unprivileged mode) if the handler exists
+   * and the kernel is not running. */
+  /* FIXME osEventObs needs to be readable but not writable from unprivileged
+   * code. */
+  if (!osKernelRunning() && osEventObs && osEventObs->pre_start) {
+    osEventObs->pre_start();
+  }
+
+  switch (__get_CONTROL() & 0x03U) {
+    case 0x00U:                                 // Privileged Thread mode & MSP
+      __set_PSP((uint32_t)(stack + 8));         // Initial PSP
+      if (os_flags & 1U) {                       
+        __set_CONTROL(0x02U);                   // Set Privileged Thread mode & PSP
+      } else {
+        __set_CONTROL(0x03U);                   // Set Unprivileged Thread mode & PSP
+      }
+      __DSB();
+      __ISB();
+      break;
+    case 0x01U:                                 // Unprivileged Thread mode & MSP
+      return osErrorOS;
+    case 0x02U:                                 // Privileged Thread mode & PSP
+      if ((os_flags & 1U) == 0U) {              // Unprivileged Thread mode requested
+        __set_CONTROL(0x03U);                   // Set Unprivileged Thread mode & PSP
+        __DSB();
+        __ISB();
+      }
+      break;
+    case 0x03U:                                 // Unprivileged Thread mode & PSP
+      if  (os_flags & 1U) { return osErrorOS; } // Privileged Thread mode requested
+      break;
+  }
+  return __svcKernelStart();
+}
+
+/// Check if the RTOS kernel is already started
+int32_t osKernelRunning (void) {
+  if ((__get_PRIMASK() != 0U || __get_IPSR() != 0U) || ((__get_CONTROL() & 1U) == 0U)) {
+    // in ISR or Privileged
+    return (int32_t)os_running;
+  } else {
+    return __svcKernelRunning();
+  }
+}
+
+/// Get the RTOS kernel system timer counter
+uint32_t osKernelSysTick (void) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) { return 0U; }        // Not allowed in ISR
+  return __svcKernelSysTick();
+}
+
+
+// ==== Thread Management ====
+
+/// Set Thread Error (for Create functions which return IDs)
+static void sysThreadError (osStatus status) {
+  // To Do
+}
+
+__NO_RETURN void osThreadExit (void);
+
+// Thread Service Calls declarations
+SVC_3_1(svcThreadCreate,      osThreadId, const osThreadDef_t *, void *, void *, RET_pointer)
+SVC_0_1(svcThreadGetId,       osThreadId,                                    RET_pointer)
+SVC_1_1(svcThreadTerminate,   osStatus,         osThreadId,                  RET_osStatus)
+SVC_0_1(svcThreadYield,       osStatus,                                      RET_osStatus)
+SVC_2_1(svcThreadSetPriority, osStatus,         osThreadId,      osPriority, RET_osStatus)
+SVC_1_1(svcThreadGetPriority, osPriority,       osThreadId,                  RET_osPriority)
+SVC_2_3(svcThreadGetInfo,    os_InRegs osEvent, osThreadId,    osThreadInfo, RET_osEvent)
+
+// Thread Service Calls
+
+/// Create a thread and add it to Active Threads and set it to state READY
+osThreadId svcThreadCreate (const osThreadDef_t *thread_def, void *argument, void *context) {
+  P_TCB  ptcb;
+  OS_TID tsk;
+  void  *stk;
+
+  if ((thread_def == NULL) ||
+      (thread_def->pthread == NULL) ||
+      (thread_def->tpriority < osPriorityIdle) ||
+      (thread_def->tpriority > osPriorityRealtime)) {
+    sysThreadError(osErrorParameter); 
+    return NULL; 
+  }
+
+#ifdef __MBED_CMSIS_RTOS_CM
+  if (thread_def->stacksize != 0) {             // Custom stack size
+    stk = (void *)thread_def->stack_pointer;
+  } else {                                      // Default stack size
+    stk = NULL;
+  }
+#else
+  if (thread_def->stacksize != 0) {             // Custom stack size
+    stk = rt_alloc_mem(                         // Allocate stack
+      os_stack_mem,
+      thread_def->stacksize
+    );
+    if (stk == NULL) { 
+      sysThreadError(osErrorNoMemory);          // Out of memory
+      return NULL;
+    }
+  } else {                                      // Default stack size
+    stk = NULL;
+  }
+#endif
+
+  tsk = rt_tsk_create(                          // Create task
+    (FUNCP)thread_def->pthread,                 // Task function pointer
+    (uint32_t)
+    (thread_def->tpriority-osPriorityIdle+1) |  // Task priority
+    (thread_def->stacksize << 8),               // Task stack size in bytes
+    stk,                                        // Pointer to task's stack
+    argument                                    // Argument to the task
+  );
+
+  if (tsk == 0U) {                              // Invalid task ID
+#ifndef __MBED_CMSIS_RTOS_CM
+    if (stk != NULL) {
+      rt_free_mem(os_stack_mem, stk);           // Free allocated stack
+    }
+#endif
+    sysThreadError(osErrorNoMemory);            // Create task failed (Out of memory)
+    return NULL;
+  }
+
+  ptcb = (P_TCB)os_active_TCB[tsk - 1U];        // TCB pointer
+
+  *((uint32_t *)ptcb->tsk_stack + 13) = (uint32_t)osThreadExit;
+
+  if (osEventObs && osEventObs->thread_create) {
+    ptcb->context = osEventObs->thread_create(ptcb->task_id, context);
+  } else {
+    ptcb->context = context;
+  }
+
+  return ptcb;
+}
+
+/// Return the thread ID of the current running thread
+osThreadId svcThreadGetId (void) {
+  OS_TID tsk;
+
+  tsk = rt_tsk_self();
+  if (tsk == 0U) { return NULL; }
+  return (P_TCB)os_active_TCB[tsk - 1U];
+}
+
+/// Terminate execution of a thread and remove it from ActiveThreads
+osStatus svcThreadTerminate (osThreadId thread_id) {
+  OS_RESULT res;
+  P_TCB     ptcb;
+#ifndef __MBED_CMSIS_RTOS_CM
+  void     *stk;
+#endif
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) { 
+    return osErrorParameter;
+  }
+
+#ifndef __MBED_CMSIS_RTOS_CM
+  stk = ptcb->priv_stack ? ptcb->stack : NULL;  // Private stack
+#endif
+
+  if (osEventObs && osEventObs->thread_destroy) {
+    osEventObs->thread_destroy(ptcb->context);
+  }
+
+  res = rt_tsk_delete(ptcb->task_id);           // Delete task
+
+  if (res == OS_R_NOK) {
+    return osErrorResource;                     // Delete task failed
+  }
+
+#ifndef __MBED_CMSIS_RTOS_CM
+  if (stk != NULL) {                            
+    rt_free_mem(os_stack_mem, stk);             // Free private stack
+  }
+#endif
+
+  return osOK;
+}
+
+/// Pass control to next thread that is in state READY
+osStatus svcThreadYield (void) {
+  rt_tsk_pass();                                // Pass control to next task
+  return osOK;
+}
+
+/// Change priority of an active thread
+osStatus svcThreadSetPriority (osThreadId thread_id, osPriority priority) {
+  OS_RESULT res;
+  P_TCB     ptcb;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) { 
+    return osErrorParameter; 
+  }
+
+  if ((priority < osPriorityIdle) || (priority > osPriorityRealtime)) {
+    return osErrorValue;
+  }
+
+  res = rt_tsk_prio(                            // Change task priority
+    ptcb->task_id,                              // Task ID
+    (uint8_t)(priority - osPriorityIdle + 1)    // New task priority
+  );
+
+  if (res == OS_R_NOK) {
+    return osErrorResource;                     // Change task priority failed
+  }
+
+  return osOK;
+}
+
+/// Get current priority of an active thread
+osPriority svcThreadGetPriority (osThreadId thread_id) {
+  P_TCB ptcb;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) {
+    return osPriorityError;
+  }
+
+  return (osPriority)(ptcb->prio - 1 + osPriorityIdle); 
+}
+
+/// Get info from an active thread
+os_InRegs osEvent_type svcThreadGetInfo (osThreadId thread_id, osThreadInfo info) {
+  P_TCB ptcb;
+  osEvent ret;
+  ret.status = osOK;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) {
+    ret.status = osErrorValue;
+    return osEvent_ret_status;
+  }
+
+  if (osThreadInfoStackSize == info) {
+    uint32_t size;
+    size = ptcb->priv_stack;
+    if (0 == size) {
+      // This is an OS task - always a fixed size
+      size = os_stackinfo & 0x3FFFF;
+    }
+    ret.value.v = size;
+    return osEvent_ret_value;
+  }
+
+  if (osThreadInfoStackMax == info) {
+    uint32_t i;
+    uint32_t *stack_ptr;
+    uint32_t stack_size;
+    if (!(os_stackinfo & (1 << 28))) {
+      // Stack init must be turned on for max stack usage
+      ret.status = osErrorResource;
+      return osEvent_ret_status;
+    }
+    stack_ptr = (uint32_t*)ptcb->stack;
+    stack_size = ptcb->priv_stack;
+    if (0 == stack_size) {
+      // This is an OS task - always a fixed size
+      stack_size = os_stackinfo & 0x3FFFF;
+    }
+    for (i = 1; i <stack_size / 4; i++) {
+      if (stack_ptr[i] != MAGIC_PATTERN) {
+        break;
+      }
+    }
+    ret.value.v = stack_size - i * 4;
+    return osEvent_ret_value;
+  }
+
+  if (osThreadInfoEntry == info) {
+    ret.value.p = (void*)ptcb->ptask;
+    return osEvent_ret_value;
+  }
+
+  if (osThreadInfoArg == info) {
+    ret.value.p = (void*)ptcb->argv;
+    return osEvent_ret_value;
+  }
+
+  // Unsupported option so return error
+  ret.status = osErrorParameter;
+  return osEvent_ret_status;
+}
+
+// Thread Public API
+
+/// Create a thread and add it to Active Threads and set it to state READY
+osThreadId osThreadCreate (const osThreadDef_t *thread_def, void *argument) {
+  return osThreadContextCreate(thread_def, argument, NULL);
+}
+osThreadId osThreadContextCreate (const osThreadDef_t *thread_def, void *argument, void *context) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return NULL;                                // Not allowed in ISR
+  }
+  if (((__get_CONTROL() & 1U) == 0U) && (os_running == 0U)) {
+    // Privileged and not running
+    return   svcThreadCreate(thread_def, argument, context);
+  } else {
+    osThreadId id;
+    osMutexWait(osMutexId_osThreadMutex, osWaitForever);
+    // Thread mutex must be held when a thread is created or terminated
+    id = __svcThreadCreate(thread_def, argument, context);
+    osMutexRelease(osMutexId_osThreadMutex);
+    return id;
+  }
+}
+
+/// Return the thread ID of the current running thread
+osThreadId osThreadGetId (void) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return NULL;                                // Not allowed in ISR
+  }
+  return __svcThreadGetId();
+}
+
+/// Terminate execution of a thread and remove it from ActiveThreads
+osStatus osThreadTerminate (osThreadId thread_id) {
+  osStatus status;
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return osErrorISR;                          // Not allowed in ISR
+  }
+  osMutexWait(osMutexId_osThreadMutex, osWaitForever);
+  sysThreadTerminate(thread_id);
+  // Thread mutex must be held when a thread is created or terminated
+  status = __svcThreadTerminate(thread_id);
+  osMutexRelease(osMutexId_osThreadMutex);
+  return status;
+}
+
+/// Pass control to next thread that is in state READY
+osStatus osThreadYield (void) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return osErrorISR;                          // Not allowed in ISR
+  }
+  return __svcThreadYield();
+}
+
+/// Change priority of an active thread
+osStatus osThreadSetPriority (osThreadId thread_id, osPriority priority) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return osErrorISR;                          // Not allowed in ISR
+  }
+  return __svcThreadSetPriority(thread_id, priority);
+}
+
+/// Get current priority of an active thread
+osPriority osThreadGetPriority (osThreadId thread_id) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return osPriorityError;                     // Not allowed in ISR
+  }
+  return __svcThreadGetPriority(thread_id);
+}
+
+/// INTERNAL - Not Public
+/// Auto Terminate Thread on exit (used implicitly when thread exists)
+__NO_RETURN void osThreadExit (void) {
+  osThreadId id;
+  // Thread mutex must be held when a thread is created or terminated
+  // Note - the mutex will be released automatically by the os when
+  //        the thread is terminated
+  osMutexWait(osMutexId_osThreadMutex, osWaitForever);
+  id = __svcThreadGetId();
+  sysThreadTerminate(id);
+  __svcThreadTerminate(id);
+  for (;;);                                     // Should never come here
+}
+
+#ifdef __MBED_CMSIS_RTOS_CM
+/// Get current thread state
+uint8_t osThreadGetState (osThreadId thread_id) {
+  P_TCB ptcb;
+
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) return osErrorISR;     // Not allowed in ISR
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) return INACTIVE;
+
+  return ptcb->state;
+}
+#endif
+
+/// Get the requested info from the specified active thread
+os_InRegs osEvent _osThreadGetInfo(osThreadId thread_id, osThreadInfo info) {
+  osEvent ret;
+
+  if (__get_IPSR() != 0U) {                     // Not allowed in ISR
+    ret.status = osErrorISR;
+    return ret;
+  }
+  return __svcThreadGetInfo(thread_id, info);
+}
+
+osThreadEnumId _osThreadsEnumStart() {
+  static uint32_t thread_enum_index;
+  osMutexWait(osMutexId_osThreadMutex, osWaitForever);
+  thread_enum_index = 0;
+  return &thread_enum_index;
+}
+
+osThreadId _osThreadEnumNext(osThreadEnumId enum_id) {
+  uint32_t i;
+  osThreadId id = NULL;
+  uint32_t *index = (uint32_t*)enum_id;
+  for (i = *index; i < os_maxtaskrun; i++) {
+    if (os_active_TCB[i] != NULL) {
+      id = (osThreadId)os_active_TCB[i];
+      break;
+    }
+  }
+  if (i == os_maxtaskrun) {
+    // Include the idle task at the end of the enumeration
+    id = &os_idle_TCB;
+  }
+  *index = i + 1;
+  return id;
+}
+
+osStatus _osThreadEnumFree(osThreadEnumId enum_id) {
+  uint32_t *index = (uint32_t*)enum_id;
+  *index = 0;
+  osMutexRelease(osMutexId_osThreadMutex);
+  return osOK;
+}
+
+// ==== Generic Wait Functions ====
+
+// Generic Wait Service Calls declarations
+SVC_1_1(svcDelay,           osStatus, uint32_t, RET_osStatus)
+#if osFeature_Wait != 0
+SVC_1_3(svcWait,  os_InRegs osEvent,  uint32_t, RET_osEvent)
+#endif
+
+// Generic Wait Service Calls
+
+/// Wait for Timeout (Time Delay)
+osStatus svcDelay (uint32_t millisec) {
+  if (millisec == 0U) { return osOK; }
+  rt_dly_wait(rt_ms2tick(millisec));
+  return osEventTimeout;
+}
+
+/// Wait for Signal, Message, Mail, or Timeout
+#if osFeature_Wait != 0
+os_InRegs osEvent_type svcWait (uint32_t millisec) {
+  osEvent ret;
+
+  if (millisec == 0U) {
+    ret.status = osOK;
+    return osEvent_ret_status;
+  }
+
+  /* To Do: osEventSignal, osEventMessage, osEventMail */
+  rt_dly_wait(rt_ms2tick(millisec));
+  ret.status = osEventTimeout;
+
+  return osEvent_ret_status;
+}
+#endif
+
+
+// Generic Wait API
+
+/// Wait for Timeout (Time Delay)
+osStatus osDelay (uint32_t millisec) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return osErrorISR;                          // Not allowed in ISR
+  }
+  return __svcDelay(millisec);
+}
+
+/// Wait for Signal, Message, Mail, or Timeout
+os_InRegs osEvent osWait (uint32_t millisec) {
+  osEvent ret;
+
+#if osFeature_Wait == 0
+  ret.status = osErrorOS;
+  return ret;
+#else
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {                     // Not allowed in ISR
+    ret.status = osErrorISR;
+    return ret;
+  }
+  return __svcWait(millisec);
+#endif
+}
+
+
+// ==== Timer Management ====
+
+// Timer definitions
+#define osTimerInvalid  0U
+#define osTimerStopped  1U
+#define osTimerRunning  2U
+
+// Timer structures 
+
+typedef struct os_timer_cb_ {                   // Timer Control Block
+  struct os_timer_cb_ *next;                    // Pointer to next active Timer
+  uint8_t             state;                    // Timer State
+  uint8_t              type;                    // Timer Type (Periodic/One-shot)
+  uint16_t         reserved;                    // Reserved
+  uint32_t             tcnt;                    // Timer Delay Count
+  uint32_t             icnt;                    // Timer Initial Count 
+  void                 *arg;                    // Timer Function Argument
+  const osTimerDef_t *timer;                    // Pointer to Timer definition
+} os_timer_cb;
+
+// Timer variables
+os_timer_cb *os_timer_head;                     // Pointer to first active Timer
+
+
+// Timer Helper Functions
+
+// Insert Timer into the list sorted by time
+static void rt_timer_insert (os_timer_cb *pt, uint32_t tcnt) {
+  os_timer_cb *p, *prev;
+
+  prev = NULL;
+  p = os_timer_head;
+  while (p != NULL) {
+    if (tcnt < p->tcnt) { break; }
+    tcnt -= p->tcnt;
+    prev = p;
+    p = p->next;
+  }
+  pt->next = p;
+  pt->tcnt = tcnt;
+  if (p != NULL) {
+    p->tcnt -= pt->tcnt;
+  }
+  if (prev != NULL) {
+    prev->next = pt;
+  } else {
+    os_timer_head = pt;
+  }
+}
+
+// Remove Timer from the list
+static int32_t rt_timer_remove (os_timer_cb *pt) {
+  os_timer_cb *p, *prev;
+
+  prev = NULL;
+  p = os_timer_head;
+  while (p != NULL) {
+    if (p == pt) { break; }
+    prev = p;
+    p = p->next;
+  }
+  if (p == NULL) { return -1; }
+  if (prev != NULL) {
+    prev->next = pt->next;
+  } else {
+    os_timer_head = pt->next;
+  }
+  if (pt->next != NULL) {
+    pt->next->tcnt += pt->tcnt;
+  }
+
+  return 0;
+}
+
+
+// Timer Service Calls declarations
+SVC_3_1(svcTimerCreate,           osTimerId,  const osTimerDef_t *, os_timer_type, void *, RET_pointer)
+SVC_2_1(svcTimerStart,            osStatus,         osTimerId,      uint32_t,              RET_osStatus)
+SVC_1_1(svcTimerStop,             osStatus,         osTimerId,                             RET_osStatus)
+SVC_1_1(svcTimerDelete,           osStatus,         osTimerId,                             RET_osStatus)
+SVC_1_2(svcTimerCall,   os_InRegs osCallback,       osTimerId,                             RET_osCallback)
+
+// Timer Management Service Calls
+
+/// Create timer
+osTimerId svcTimerCreate (const osTimerDef_t *timer_def, os_timer_type type, void *argument) {
+  os_timer_cb *pt;
+
+  if ((timer_def == NULL) || (timer_def->ptimer == NULL)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  pt = timer_def->timer;
+  if (pt == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  if ((type != osTimerOnce) && (type != osTimerPeriodic)) {
+    sysThreadError(osErrorValue);
+    return NULL;
+  }
+
+  if (osThreadId_osTimerThread == NULL) {
+    sysThreadError(osErrorResource);
+    return NULL;
+  }
+
+  if (pt->state != osTimerInvalid){
+    sysThreadError(osErrorResource);
+    return NULL;
+  }
+
+  pt->next  = NULL;
+  pt->state = osTimerStopped;
+  pt->type  =  (uint8_t)type;
+  pt->arg   = argument;
+  pt->timer = timer_def;
+
+  return (osTimerId)pt;
+}
+
+/// Start or restart timer
+osStatus svcTimerStart (osTimerId timer_id, uint32_t millisec) {
+  os_timer_cb *pt;
+  uint32_t     tcnt;
+
+  pt = rt_id2obj(timer_id);
+  if (pt == NULL) {
+    return osErrorParameter;
+  }
+
+  if (millisec == 0U) { return osErrorValue; }
+
+  tcnt = (uint32_t)(((1000U * (uint64_t)millisec) + os_clockrate - 1U)  / os_clockrate);
+
+  switch (pt->state) {
+    case osTimerRunning:
+      if (rt_timer_remove(pt) != 0) {
+        return osErrorResource;
+      }
+      break;
+    case osTimerStopped:
+      pt->state = osTimerRunning;
+      pt->icnt  = tcnt;
+      break;
+    default:
+      return osErrorResource;
+  }
+  
+  rt_timer_insert(pt, tcnt);
+
+  return osOK;
+}
+
+/// Stop timer
+osStatus svcTimerStop (osTimerId timer_id) {
+  os_timer_cb *pt;
+
+  pt = rt_id2obj(timer_id);
+  if (pt == NULL) {
+    return osErrorParameter;
+  }
+
+  if (pt->state != osTimerRunning) { return osErrorResource; }
+
+  pt->state = osTimerStopped;
+
+  if (rt_timer_remove(pt) != 0) {
+    return osErrorResource;
+  }
+
+  return osOK;
+}
+
+/// Delete timer
+osStatus svcTimerDelete (osTimerId timer_id) {
+  os_timer_cb *pt;
+
+  pt = rt_id2obj(timer_id);
+  if (pt == NULL) {
+    return osErrorParameter;
+  }
+
+  switch (pt->state) {
+    case osTimerRunning:
+      rt_timer_remove(pt);
+      break;
+    case osTimerStopped:
+      break;
+    default:
+      return osErrorResource;
+  }
+
+  pt->state = osTimerInvalid;
+
+  return osOK;
+}
+
+/// Get timer callback parameters
+os_InRegs osCallback_type svcTimerCall (osTimerId timer_id) {
+  os_timer_cb *pt;
+  osCallback   ret;
+
+  pt = rt_id2obj(timer_id);
+  if (pt == NULL) {
+    ret.fp  = NULL;
+    ret.arg = NULL;
+    return osCallback_ret;
+  }
+
+  ret.fp  = (void *)pt->timer->ptimer;
+  ret.arg = pt->arg;
+
+  return osCallback_ret;
+}
+
+osStatus isrMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec);
+
+/// Timer Tick (called each SysTick)
+void sysTimerTick (void) {
+  os_timer_cb *pt, *p;
+  osStatus     status;
+
+  p = os_timer_head;
+  if (p == NULL) { return; }
+
+  p->tcnt--;
+  while ((p != NULL) && (p->tcnt == 0U)) {
+    pt = p;
+    p = p->next;
+    os_timer_head = p;
+    status = isrMessagePut(osMessageQId_osTimerMessageQ, (uint32_t)pt, 0U);
+    if (status != osOK) {
+      os_error(OS_ERR_TIMER_OVF);
+    }
+    if (pt->type == (uint8_t)osTimerPeriodic) {
+      rt_timer_insert(pt, pt->icnt);
+    } else {
+      pt->state = osTimerStopped;
+    }
+  }
+}
+
+/// Get user timers wake-up time 
+uint32_t sysUserTimerWakeupTime (void) {
+
+  if (os_timer_head) {
+    return os_timer_head->tcnt;
+  }
+  return 0xFFFFFFFFU;
+}
+
+/// Update user timers on resume
+void sysUserTimerUpdate (uint32_t sleep_time) {
+
+  while ((os_timer_head != NULL) && (sleep_time != 0U)) {
+    if (sleep_time >= os_timer_head->tcnt) {
+      sleep_time -= os_timer_head->tcnt;
+      os_timer_head->tcnt = 1U;
+      sysTimerTick();
+    } else {
+      os_timer_head->tcnt -= sleep_time;
+      break;
+    }
+  }
+}
+
+
+// Timer Management Public API
+
+/// Create timer
+osTimerId osTimerCreate (const osTimerDef_t *timer_def, os_timer_type type, void *argument) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return NULL;                                // Not allowed in ISR
+  }
+  if (((__get_CONTROL() & 1U) == 0U) && (os_running == 0U)) {
+    // Privileged and not running
+    return   svcTimerCreate(timer_def, type, argument);
+  } else {
+    return __svcTimerCreate(timer_def, type, argument);
+  }
+}
+
+/// Start or restart timer
+osStatus osTimerStart (osTimerId timer_id, uint32_t millisec) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return osErrorISR;                          // Not allowed in ISR
+  }
+  return __svcTimerStart(timer_id, millisec);
+}
+
+/// Stop timer
+osStatus osTimerStop (osTimerId timer_id) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return osErrorISR;                          // Not allowed in ISR
+  }
+  return __svcTimerStop(timer_id);
+}
+
+/// Delete timer
+osStatus osTimerDelete (osTimerId timer_id) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return osErrorISR;                          // Not allowed in ISR
+  }
+  return __svcTimerDelete(timer_id);
+}
+
+/// INTERNAL - Not Public
+/// Get timer callback parameters (used by OS Timer Thread)
+os_InRegs osCallback osTimerCall (osTimerId timer_id) { 
+  return __svcTimerCall(timer_id); 
+}
+
+
+// Timer Thread
+__NO_RETURN void osTimerThread (void const *argument) {
+  osCallback cb;
+  osEvent    evt;
+
+  for (;;) {
+    evt = osMessageGet(osMessageQId_osTimerMessageQ, osWaitForever);
+    if (evt.status == osEventMessage) {
+      cb = osTimerCall(evt.value.p);
+      if (cb.fp != NULL) {
+        (*(os_ptimer)cb.fp)(cb.arg);
+      }
+    }
+  }
+}
+
+
+// ==== Signal Management ====
+
+// Signal Service Calls declarations
+SVC_2_1(svcSignalSet,             int32_t, osThreadId, int32_t,  RET_int32_t)
+SVC_2_1(svcSignalClear,           int32_t, osThreadId, int32_t,  RET_int32_t)
+SVC_2_3(svcSignalWait,  os_InRegs osEvent, int32_t,    uint32_t, RET_osEvent)
+
+// Signal Service Calls
+
+/// Set the specified Signal Flags of an active thread
+int32_t svcSignalSet (osThreadId thread_id, int32_t signals) {
+  P_TCB   ptcb;
+  int32_t sig;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) {
+    return (int32_t)0x80000000U;
+  }
+
+  if ((uint32_t)signals & (0xFFFFFFFFU << osFeature_Signals)) {
+    return (int32_t)0x80000000U;
+  }
+
+  sig = (int32_t)ptcb->events;                  // Previous signal flags
+
+  rt_evt_set((uint16_t)signals, ptcb->task_id); // Set event flags
+
+  return sig;
+}
+
+/// Clear the specified Signal Flags of an active thread
+int32_t svcSignalClear (osThreadId thread_id, int32_t signals) {
+  P_TCB   ptcb;
+  int32_t sig;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) {
+    return (int32_t)0x80000000U;
+  }
+
+  if ((uint32_t)signals & (0xFFFFFFFFU << osFeature_Signals)) {
+    return (int32_t)0x80000000U;
+  }
+
+  sig = (int32_t)ptcb->events;                  // Previous signal flags
+
+  rt_evt_clr((uint16_t)signals, ptcb->task_id); // Clear event flags
+
+  return sig;
+}
+
+/// Wait for one or more Signal Flags to become signaled for the current RUNNING thread
+os_InRegs osEvent_type svcSignalWait (int32_t signals, uint32_t millisec) {
+  OS_RESULT res;
+  osEvent   ret;
+
+  if ((uint32_t)signals & (0xFFFFFFFFU << osFeature_Signals)) {
+    ret.status = osErrorValue;
+    return osEvent_ret_status;
+  }
+
+  if (signals != 0) {                           // Wait for all specified signals
+    res = rt_evt_wait((uint16_t)signals, rt_ms2tick(millisec), __TRUE);
+  } else {                                      // Wait for any signal
+    res = rt_evt_wait(0xFFFFU,           rt_ms2tick(millisec), __FALSE);
+  }
+
+  if (res == OS_R_EVT) {
+    ret.status = osEventSignal;
+    ret.value.signals = (signals != 0) ? signals : (int32_t)os_tsk.run->waits;
+  } else {
+    ret.status = (millisec != 0U) ? osEventTimeout : osOK;
+    ret.value.signals = 0;
+  }
+
+  return osEvent_ret_value;
+}
+
+
+// Signal ISR Calls
+
+/// Set the specified Signal Flags of an active thread
+int32_t isrSignalSet (osThreadId thread_id, int32_t signals) {
+  P_TCB   ptcb;
+  int32_t sig;
+
+  ptcb = rt_tid2ptcb(thread_id);                // Get TCB pointer
+  if (ptcb == NULL) {
+    return (int32_t)0x80000000U;
+  }
+
+  if ((uint32_t)signals & (0xFFFFFFFFU << osFeature_Signals)) {
+    return (int32_t)0x80000000U;
+  }
+
+  sig = (int32_t)ptcb->events;                  // Previous signal flags
+
+  isr_evt_set((uint16_t)signals, ptcb->task_id);// Set event flags
+
+  return sig;
+}
+
+
+// Signal Public API
+
+/// Set the specified Signal Flags of an active thread
+int32_t osSignalSet (osThreadId thread_id, int32_t signals) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {                     // in ISR
+    return   isrSignalSet(thread_id, signals); 
+  } else {                                      // in Thread
+    return __svcSignalSet(thread_id, signals);
+  }
+}
+
+/// Clear the specified Signal Flags of an active thread
+int32_t osSignalClear (osThreadId thread_id, int32_t signals) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return (int32_t)0x80000000U;                // Not allowed in ISR
+  }
+  return __svcSignalClear(thread_id, signals);
+}
+
+/// Wait for one or more Signal Flags to become signaled for the current RUNNING thread
+os_InRegs osEvent osSignalWait (int32_t signals, uint32_t millisec) {
+  osEvent ret;
+
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {                     // Not allowed in ISR
+    ret.status = osErrorISR;
+    return ret;
+  }
+  return __svcSignalWait(signals, millisec);
+}
+
+
+// ==== Mutex Management ====
+
+// Mutex Service Calls declarations
+SVC_1_1(svcMutexCreate,  osMutexId, const osMutexDef_t *,           RET_pointer)
+SVC_2_1(svcMutexWait,    osStatus,        osMutexId,      uint32_t, RET_osStatus)
+SVC_1_1(svcMutexRelease, osStatus,        osMutexId,                RET_osStatus)
+SVC_1_1(svcMutexDelete,  osStatus,        osMutexId,                RET_osStatus)
+
+// Mutex Service Calls
+
+/// Create and Initialize a Mutex object
+osMutexId svcMutexCreate (const osMutexDef_t *mutex_def) {
+  OS_ID mut;
+
+  if (mutex_def == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  mut = mutex_def->mutex;
+  if (mut == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  if (((P_MUCB)mut)->cb_type != 0U) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  rt_mut_init(mut);                             // Initialize Mutex
+
+  return mut;
+}
+
+/// Wait until a Mutex becomes available
+osStatus svcMutexWait (osMutexId mutex_id, uint32_t millisec) {
+  OS_ID     mut;
+  OS_RESULT res;
+
+  mut = rt_id2obj(mutex_id);
+  if (mut == NULL) {
+    return osErrorParameter;
+  }
+
+  if (((P_MUCB)mut)->cb_type != MUCB) {
+    return osErrorParameter;
+  }
+
+  res = rt_mut_wait(mut, rt_ms2tick(millisec)); // Wait for Mutex
+
+  if (res == OS_R_TMO) {
+    return ((millisec != 0U) ? osErrorTimeoutResource : osErrorResource);
+  }
+
+  return osOK;
+}
+
+/// Release a Mutex that was obtained with osMutexWait
+osStatus svcMutexRelease (osMutexId mutex_id) {
+  OS_ID     mut;
+  OS_RESULT res;
+
+  mut = rt_id2obj(mutex_id);
+  if (mut == NULL) {
+    return osErrorParameter;
+  }
+
+  if (((P_MUCB)mut)->cb_type != MUCB) {
+    return osErrorParameter;
+  }
+
+  res = rt_mut_release(mut);                    // Release Mutex
+
+  if (res == OS_R_NOK) {
+    return osErrorResource;                     // Thread not owner or Zero Counter
+  }
+
+  return osOK;
+}
+
+/// Delete a Mutex that was created by osMutexCreate
+osStatus svcMutexDelete (osMutexId mutex_id) {
+  OS_ID mut;
+
+  mut = rt_id2obj(mutex_id);
+  if (mut == NULL) {
+    return osErrorParameter;
+  }
+
+  if (((P_MUCB)mut)->cb_type != MUCB) {
+    return osErrorParameter;
+  }
+
+  rt_mut_delete(mut);                           // Release Mutex
+
+  return osOK;
+}
+
+
+// Mutex Public API
+
+/// Create and Initialize a Mutex object
+osMutexId osMutexCreate (const osMutexDef_t *mutex_def) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return NULL;                                // Not allowed in ISR
+  }
+  if (((__get_CONTROL() & 1U) == 0U) && (os_running == 0U)) {
+    // Privileged and not running
+    return    svcMutexCreate(mutex_def);
+  } else {
+    return __svcMutexCreate(mutex_def);
+  }
+}
+
+/// Wait until a Mutex becomes available
+osStatus osMutexWait (osMutexId mutex_id, uint32_t millisec) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return osErrorISR;                          // Not allowed in ISR
+  }
+  return __svcMutexWait(mutex_id, millisec);
+}
+
+/// Release a Mutex that was obtained with osMutexWait
+osStatus osMutexRelease (osMutexId mutex_id) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return osErrorISR;                          // Not allowed in ISR
+  }
+  return __svcMutexRelease(mutex_id);
+}
+
+/// Delete a Mutex that was created by osMutexCreate
+osStatus osMutexDelete (osMutexId mutex_id) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return osErrorISR;                          // Not allowed in ISR
+  }
+  return __svcMutexDelete(mutex_id);
+}
+
+
+// ==== Semaphore Management ====
+
+// Semaphore Service Calls declarations
+SVC_2_1(svcSemaphoreCreate,  osSemaphoreId, const osSemaphoreDef_t *,  int32_t, RET_pointer)
+SVC_2_1(svcSemaphoreWait,    int32_t,             osSemaphoreId,      uint32_t, RET_int32_t)
+SVC_1_1(svcSemaphoreRelease, osStatus,            osSemaphoreId,                RET_osStatus)
+SVC_1_1(svcSemaphoreDelete,  osStatus,            osSemaphoreId,                RET_osStatus)
+
+// Semaphore Service Calls
+
+/// Create and Initialize a Semaphore object
+osSemaphoreId svcSemaphoreCreate (const osSemaphoreDef_t *semaphore_def, int32_t count) {
+  OS_ID sem;
+
+  if (semaphore_def == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  sem = semaphore_def->semaphore;
+  if (sem == NULL) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  if (((P_SCB)sem)->cb_type != 0U) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  if (count > osFeature_Semaphore) {
+    sysThreadError(osErrorValue);
+    return NULL;
+  }
+
+  rt_sem_init(sem, (uint16_t)count);            // Initialize Semaphore
+  
+  return sem;
+}
+
+/// Wait until a Semaphore becomes available
+int32_t svcSemaphoreWait (osSemaphoreId semaphore_id, uint32_t millisec) {
+  OS_ID     sem;
+  OS_RESULT res;
+
+  sem = rt_id2obj(semaphore_id);
+  if (sem == NULL) {
+    return -1;
+  }
+
+  if (((P_SCB)sem)->cb_type != SCB) {
+    return -1;
+  }
+
+  res = rt_sem_wait(sem, rt_ms2tick(millisec)); // Wait for Semaphore
+
+  if (res == OS_R_TMO) { return 0; }            // Timeout
+
+  return (int32_t)(((P_SCB)sem)->tokens + 1U);
+}
+
+/// Release a Semaphore
+osStatus svcSemaphoreRelease (osSemaphoreId semaphore_id) {
+  OS_ID sem;
+
+  sem = rt_id2obj(semaphore_id);
+  if (sem == NULL) {
+    return osErrorParameter;
+  }
+
+  if (((P_SCB)sem)->cb_type != SCB) {
+    return osErrorParameter;
+  }
+
+  if ((int32_t)((P_SCB)sem)->tokens == osFeature_Semaphore) {
+    return osErrorResource;
+  }
+  
+  rt_sem_send(sem);                             // Release Semaphore
+
+  return osOK;
+}
+
+/// Delete a Semaphore that was created by osSemaphoreCreate
+osStatus svcSemaphoreDelete (osSemaphoreId semaphore_id) {
+  OS_ID sem;
+
+  sem = rt_id2obj(semaphore_id);
+  if (sem == NULL) {
+    return osErrorParameter;
+  }
+
+  if (((P_SCB)sem)->cb_type != SCB) {
+    return osErrorParameter;
+  }
+
+  rt_sem_delete(sem);                           // Delete Semaphore
+
+  return osOK;
+}
+
+
+// Semaphore ISR Calls
+
+/// Release a Semaphore
+osStatus isrSemaphoreRelease (osSemaphoreId semaphore_id) {
+  OS_ID sem;
+
+  sem = rt_id2obj(semaphore_id);
+  if (sem == NULL) {
+    return osErrorParameter;
+  }
+
+  if (((P_SCB)sem)->cb_type != SCB) {
+    return osErrorParameter;
+  }
+
+  if ((int32_t)((P_SCB)sem)->tokens == osFeature_Semaphore) {
+    return osErrorResource;
+  }
+
+  isr_sem_send(sem);                            // Release Semaphore
+
+  return osOK;
+}
+
+
+// Semaphore Public API
+
+/// Create and Initialize a Semaphore object
+osSemaphoreId osSemaphoreCreate (const osSemaphoreDef_t *semaphore_def, int32_t count) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return NULL;                                // Not allowed in ISR
+  }
+  if (((__get_CONTROL() & 1U) == 0U) && (os_running == 0U)) {
+    // Privileged and not running
+    return   svcSemaphoreCreate(semaphore_def, count);
+  } else {
+    return __svcSemaphoreCreate(semaphore_def, count);
+  }
+}
+
+/// Wait until a Semaphore becomes available
+int32_t osSemaphoreWait (osSemaphoreId semaphore_id, uint32_t millisec) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return -1;                                  // Not allowed in ISR
+  }
+  return __svcSemaphoreWait(semaphore_id, millisec);
+}
+
+/// Release a Semaphore
+osStatus osSemaphoreRelease (osSemaphoreId semaphore_id) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {    // in ISR
+    return   isrSemaphoreRelease(semaphore_id);
+  } else {                                              // in Thread
+    return __svcSemaphoreRelease(semaphore_id);
+  }
+}
+
+/// Delete a Semaphore that was created by osSemaphoreCreate
+osStatus osSemaphoreDelete (osSemaphoreId semaphore_id) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return osErrorISR;                          // Not allowed in ISR
+  }
+  return __svcSemaphoreDelete(semaphore_id);
+}
+
+
+// ==== Memory Management Functions ====
+
+// Memory Management Helper Functions
+
+// Clear Memory Box (Zero init)
+static void rt_clr_box (void *box_mem, void *box) {
+  uint32_t *p, n;
+
+  if ((box_mem != NULL) && (box != NULL)) {
+    p = box;
+    for (n = ((P_BM)box_mem)->blk_size; n; n -= 4U) {
+      *p++ = 0U;
+    }
+  }
+}
+
+// Memory Management Service Calls declarations
+SVC_1_1(svcPoolCreate, osPoolId, const osPoolDef_t *,         RET_pointer)
+SVC_1_1(sysPoolAlloc,  void *,         osPoolId,              RET_pointer)
+SVC_2_1(sysPoolFree,   osStatus,       osPoolId,      void *, RET_osStatus)
+
+// Memory Management Service & ISR Calls
+
+/// Create and Initialize memory pool
+osPoolId svcPoolCreate (const osPoolDef_t *pool_def) {
+  uint32_t blk_sz;
+
+  if ((pool_def == NULL) ||
+      (pool_def->pool_sz == 0U) ||
+      (pool_def->item_sz == 0U) ||
+      (pool_def->pool == NULL)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  blk_sz = (pool_def->item_sz + 3U) & (uint32_t)~3U;
+
+  _init_box(pool_def->pool, sizeof(struct OS_BM) + (pool_def->pool_sz * blk_sz), blk_sz);
+
+  return pool_def->pool;
+}
+
+/// Allocate a memory block from a memory pool
+void *sysPoolAlloc (osPoolId pool_id) {
+  void *mem;
+
+  if (pool_id == NULL) {
+    return NULL;
+  }
+
+  mem = rt_alloc_box(pool_id);
+
+  return mem;
+}
+
+/// Return an allocated memory block back to a specific memory pool
+osStatus sysPoolFree (osPoolId pool_id, void *block) {
+  uint32_t res;
+    
+  if (pool_id == NULL) {
+    return osErrorParameter;
+  }
+
+  res = rt_free_box(pool_id, block);
+  if (res != 0) {
+    return osErrorValue;
+  }
+
+  return osOK;
+}
+
+
+// Memory Management Public API
+
+/// Create and Initialize memory pool
+osPoolId osPoolCreate (const osPoolDef_t *pool_def) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return NULL;                                // Not allowed in ISR
+  }
+  if (((__get_CONTROL() & 1U) == 0U) && (os_running == 0U)) {
+    // Privileged and not running
+    return   svcPoolCreate(pool_def);
+  } else {
+    return __svcPoolCreate(pool_def);
+  }
+}
+
+/// Allocate a memory block from a memory pool
+void *osPoolAlloc (osPoolId pool_id) {
+  if ((__get_PRIMASK() != 0U || __get_IPSR() != 0U) || ((__get_CONTROL() & 1U) == 0U)) {     // in ISR or Privileged
+    return   sysPoolAlloc(pool_id);
+  } else {                                      // in Thread
+    return __sysPoolAlloc(pool_id);
+  }
+}
+
+/// Allocate a memory block from a memory pool and set memory block to zero
+void *osPoolCAlloc (osPoolId pool_id) {
+  void *mem;
+
+  if ((__get_PRIMASK() != 0U || __get_IPSR() != 0U) || ((__get_CONTROL() & 1U) == 0U)) {     // in ISR or Privileged
+    mem =   sysPoolAlloc(pool_id);
+  } else {                                      // in Thread
+    mem = __sysPoolAlloc(pool_id);
+  }
+
+  rt_clr_box(pool_id, mem);
+
+  return mem;
+}
+
+/// Return an allocated memory block back to a specific memory pool
+osStatus osPoolFree (osPoolId pool_id, void *block) {
+  if ((__get_PRIMASK() != 0U || __get_IPSR() != 0U) || ((__get_CONTROL() & 1U) == 0U)) {     // in ISR or Privileged
+    return   sysPoolFree(pool_id, block);
+  } else {                                      // in Thread
+    return __sysPoolFree(pool_id, block);
+  }
+}
+
+
+// ==== Message Queue Management Functions ====
+
+// Message Queue Management Service Calls declarations
+SVC_2_1(svcMessageCreate,        osMessageQId, const osMessageQDef_t *, osThreadId,           RET_pointer)
+SVC_3_1(svcMessagePut,           osStatus,           osMessageQId,      uint32_t,   uint32_t, RET_osStatus)
+SVC_2_3(svcMessageGet, os_InRegs osEvent,            osMessageQId,      uint32_t,             RET_osEvent)
+
+// Message Queue Service Calls
+
+/// Create and Initialize Message Queue
+osMessageQId svcMessageCreate (const osMessageQDef_t *queue_def, osThreadId thread_id) {
+
+  if ((queue_def == NULL) ||
+      (queue_def->queue_sz == 0U) ||
+      (queue_def->pool == NULL)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+  
+  if (((P_MCB)queue_def->pool)->cb_type != 0U) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  rt_mbx_init(queue_def->pool, (uint16_t)(4U*(queue_def->queue_sz + 4U)));
+
+  return queue_def->pool;
+}
+
+/// Put a Message to a Queue
+osStatus svcMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec) {
+  OS_RESULT res;
+
+  if (queue_id == NULL) {
+    return osErrorParameter;
+  }
+
+  if (((P_MCB)queue_id)->cb_type != MCB) {
+    return osErrorParameter;
+  }
+
+  res = rt_mbx_send(queue_id, (void *)info, rt_ms2tick(millisec));
+
+  if (res == OS_R_TMO) {
+    return ((millisec != 0U) ? osErrorTimeoutResource : osErrorResource);
+  }
+
+  return osOK;
+}
+
+/// Get a Message or Wait for a Message from a Queue
+os_InRegs osEvent_type svcMessageGet (osMessageQId queue_id, uint32_t millisec) {
+  OS_RESULT res;
+  osEvent   ret;
+
+  if (queue_id == NULL) {
+    ret.status = osErrorParameter;
+    return osEvent_ret_status;
+  }
+
+  if (((P_MCB)queue_id)->cb_type != MCB) {
+    ret.status = osErrorParameter;
+    return osEvent_ret_status;
+  }
+
+  res = rt_mbx_wait(queue_id, &ret.value.p, rt_ms2tick(millisec));
+  
+  if (res == OS_R_TMO) {
+    ret.status = (millisec != 0U) ? osEventTimeout : osOK;
+    return osEvent_ret_value;
+  }
+
+  ret.status = osEventMessage;
+
+  return osEvent_ret_value;
+}
+
+
+// Message Queue ISR Calls
+
+/// Put a Message to a Queue
+osStatus isrMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec) {
+
+  if ((queue_id == NULL) || (millisec != 0U)) {
+    return osErrorParameter;
+  }
+
+  if (((P_MCB)queue_id)->cb_type != MCB) {
+    return osErrorParameter;
+  }
+
+  if (rt_mbx_check(queue_id) == 0U) {           // Check if Queue is full
+    return osErrorResource;
+  }
+
+  isr_mbx_send(queue_id, (void *)info);
+
+  return osOK;
+}
+
+/// Get a Message or Wait for a Message from a Queue
+os_InRegs osEvent isrMessageGet (osMessageQId queue_id, uint32_t millisec) {
+  OS_RESULT res;
+  osEvent   ret;
+
+  if ((queue_id == NULL) || (millisec != 0U)) {
+    ret.status = osErrorParameter;
+    return ret;
+  }
+
+  if (((P_MCB)queue_id)->cb_type != MCB) {
+    ret.status = osErrorParameter;
+    return ret;
+  }
+
+  res = isr_mbx_receive(queue_id, &ret.value.p);
+  
+  if (res != OS_R_MBX) {
+    ret.status = osOK;
+    return ret;
+  }
+
+  ret.status = osEventMessage; 
+
+  return ret;
+}
+
+
+// Message Queue Management Public API
+
+/// Create and Initialize Message Queue
+osMessageQId osMessageCreate (const osMessageQDef_t *queue_def, osThreadId thread_id) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return NULL;                                // Not allowed in ISR
+  }
+  if (((__get_CONTROL() & 1U) == 0U) && (os_running == 0U)) {
+    // Privileged and not running
+    return   svcMessageCreate(queue_def, thread_id);
+  } else {
+    return __svcMessageCreate(queue_def, thread_id);
+  }
+}
+
+/// Put a Message to a Queue
+osStatus osMessagePut (osMessageQId queue_id, uint32_t info, uint32_t millisec) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {                     // in ISR
+    return   isrMessagePut(queue_id, info, millisec);
+  } else {                                      // in Thread
+    return __svcMessagePut(queue_id, info, millisec);
+  }
+}
+
+/// Get a Message or Wait for a Message from a Queue
+os_InRegs osEvent osMessageGet (osMessageQId queue_id, uint32_t millisec) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {                     // in ISR
+    return   isrMessageGet(queue_id, millisec);
+  } else {                                      // in Thread
+    return __svcMessageGet(queue_id, millisec);
+  }
+}
+
+
+// ==== Mail Queue Management Functions ====
+
+// Mail Queue Management Service Calls declarations
+SVC_2_1(svcMailCreate, osMailQId, const osMailQDef_t *, osThreadId,         RET_pointer)
+SVC_3_1(sysMailAlloc,  void *,          osMailQId,      uint32_t, uint32_t, RET_pointer)
+SVC_3_1(sysMailFree,   osStatus,        osMailQId,      void *,   uint32_t, RET_osStatus)
+
+// Mail Queue Management Service & ISR Calls
+
+/// Create and Initialize mail queue
+osMailQId svcMailCreate (const osMailQDef_t *queue_def, osThreadId thread_id) {
+  uint32_t blk_sz;
+  P_MCB    pmcb;
+  void    *pool;
+
+  if ((queue_def == NULL) ||
+      (queue_def->queue_sz == 0U) ||
+      (queue_def->item_sz  == 0U) ||
+      (queue_def->pool == NULL)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  pmcb = *(((void **)queue_def->pool) + 0);
+  pool = *(((void **)queue_def->pool) + 1);
+
+  if ((pool == NULL) || (pmcb == NULL) || (pmcb->cb_type != 0U)) {
+    sysThreadError(osErrorParameter);
+    return NULL;
+  }
+
+  blk_sz = (queue_def->item_sz + 3U) & (uint32_t)~3U;
+
+  _init_box(pool, sizeof(struct OS_BM) + (queue_def->queue_sz * blk_sz), blk_sz);
+
+  rt_mbx_init(pmcb, (uint16_t)(4U*(queue_def->queue_sz + 4U)));
+
+  return queue_def->pool;
+}
+
+/// Allocate a memory block from a mail
+void *sysMailAlloc (osMailQId queue_id, uint32_t millisec, uint32_t isr) {
+  P_MCB pmcb;
+  void *pool;
+  void *mem;
+
+  if (queue_id == NULL) {
+    return NULL;
+  }
+
+  pmcb = *(((void **)queue_id) + 0);
+  pool = *(((void **)queue_id) + 1);
+
+  if ((pool == NULL) || (pmcb == NULL)) {
+    return NULL; 
+  }
+
+  if ((isr != 0U) && (millisec != 0U)) {
+    return NULL;
+  }
+
+  mem = rt_alloc_box(pool);
+
+  if ((mem == NULL) && (millisec != 0U)) {
+    // Put Task to sleep when Memory not available
+    if (pmcb->p_lnk != NULL) {
+      rt_put_prio((P_XCB)pmcb, os_tsk.run);
+    } else {
+      pmcb->p_lnk = os_tsk.run;
+      os_tsk.run->p_lnk = NULL;
+      os_tsk.run->p_rlnk = (P_TCB)pmcb;
+      // Task is waiting to allocate a message
+      pmcb->state = 3U;
+    }
+    rt_block(rt_ms2tick(millisec), WAIT_MBX);
+  }
+
+  return mem;  
+}
+
+/// Free a memory block from a mail
+osStatus sysMailFree (osMailQId queue_id, void *mail, uint32_t isr) {
+  P_MCB    pmcb;
+  P_TCB    ptcb;
+  void    *pool;
+  void    *mem;
+  uint32_t res;
+
+  if (queue_id == NULL) {
+    return osErrorParameter;
+  }
+
+  pmcb = *(((void **)queue_id) + 0);
+  pool = *(((void **)queue_id) + 1);
+
+  if ((pmcb == NULL) || (pool == NULL)) {
+    return osErrorParameter;
+  }
+
+  res = rt_free_box(pool, mail);
+
+  if (res != 0U) {
+    return osErrorValue;
+  }
+
+  if ((pmcb->p_lnk != NULL) && (pmcb->state == 3U)) {
+    // Task is waiting to allocate a message
+    if (isr != 0U) {
+      rt_psq_enq (pmcb, (U32)pool);
+      rt_psh_req ();
+    } else {
+      mem = rt_alloc_box(pool);
+      if (mem != NULL) {
+        ptcb = rt_get_first((P_XCB)pmcb);
+        rt_ret_val(ptcb, (U32)mem);
+        rt_rmv_dly(ptcb);
+        rt_dispatch(ptcb);
+      }
+    }
+  }
+
+  return osOK;
+}
+
+
+// Mail Queue Management Public API
+
+/// Create and Initialize mail queue
+osMailQId osMailCreate (const osMailQDef_t *queue_def, osThreadId thread_id) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {
+    return NULL;                                // Not allowed in ISR
+  }
+  if (((__get_CONTROL() & 1U) == 0U) && (os_running == 0U)) {
+    // Privileged and not running
+    return   svcMailCreate(queue_def, thread_id);
+  } else {
+    return __svcMailCreate(queue_def, thread_id);
+  }
+}
+
+/// Allocate a memory block from a mail
+void *osMailAlloc (osMailQId queue_id, uint32_t millisec) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {                     // in ISR
+    return   sysMailAlloc(queue_id, millisec, 1U);
+  } else {                                      // in Thread
+    return __sysMailAlloc(queue_id, millisec, 0U);
+  }
+}
+
+/// Allocate a memory block from a mail and set memory block to zero
+void *osMailCAlloc (osMailQId queue_id, uint32_t millisec) {
+  void *pool;
+  void *mem;
+
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {                     // in ISR
+    mem =   sysMailAlloc(queue_id, millisec, 1U);
+  } else {                                      // in Thread
+    mem = __sysMailAlloc(queue_id, millisec, 0U);
+  }
+
+  pool = *(((void **)queue_id) + 1);
+
+  rt_clr_box(pool, mem);
+
+  return mem;
+}
+
+/// Free a memory block from a mail
+osStatus osMailFree (osMailQId queue_id, void *mail) {
+  if (__get_PRIMASK() != 0U || __get_IPSR() != 0U) {                     // in ISR
+    return   sysMailFree(queue_id, mail, 1U);
+  } else {                                      // in Thread
+    return __sysMailFree(queue_id, mail, 0U);
+  }
+}
+
+/// Put a mail to a queue
+osStatus osMailPut (osMailQId queue_id, void *mail) {
+  if (queue_id == NULL) {
+    return osErrorParameter;
+  }
+  if (mail == NULL) {
+    return osErrorValue;
+  }
+  return osMessagePut(*((void **)queue_id), (uint32_t)mail, 0U);
+}
+
+/// Get a mail from a queue
+os_InRegs osEvent osMailGet (osMailQId queue_id, uint32_t millisec) {
+  osEvent ret;
+
+  if (queue_id == NULL) {
+    ret.status = osErrorParameter;
+    return ret;
+  }
+
+  ret = osMessageGet(*((void **)queue_id), millisec);
+  if (ret.status == osEventMessage) ret.status = osEventMail;
+
+  return ret;
+}
+
+
+//  ==== RTX Extensions ====
+
+// Service Calls declarations
+SVC_0_1(rt_suspend, uint32_t, RET_uint32_t)
+SVC_1_0(rt_resume,  void,     uint32_t)
+
+
+// Public API
+
+/// Suspends the OS task scheduler
+uint32_t os_suspend (void) {
+  return __rt_suspend();
+}
+
+/// Resumes the OS task scheduler
+void os_resume (uint32_t sleep_time) {
+  __rt_resume(sleep_time);
+}
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Event.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Event.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,190 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_EVENT.C
+ *      Purpose: Implements waits and wake-ups for event flags
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_Event.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#include "rt_HAL_CM.h"
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_evt_wait -----------------------------------*/
+
+OS_RESULT rt_evt_wait (U16 wait_flags, U16 timeout, BOOL and_wait) {
+  /* Wait for one or more event flags with optional time-out.                */
+  /* "wait_flags" identifies the flags to wait for.                          */
+  /* "timeout" is the time-out limit in system ticks (0xffff if no time-out) */
+  /* "and_wait" specifies the AND-ing of "wait_flags" as condition to be met */
+  /* to complete the wait. (OR-ing if set to 0).                             */
+  U32 block_state;
+
+  if (and_wait) {
+    /* Check for AND-connected events */
+    if ((os_tsk.run->events & wait_flags) == wait_flags) {
+      os_tsk.run->events &= ~wait_flags;
+      return (OS_R_EVT);
+    }
+    block_state = WAIT_AND;
+  }
+  else {
+    /* Check for OR-connected events */
+    if (os_tsk.run->events & wait_flags) {
+      os_tsk.run->waits = os_tsk.run->events & wait_flags;
+      os_tsk.run->events &= ~wait_flags;
+      return (OS_R_EVT);
+    }
+    block_state = WAIT_OR;
+  }
+  /* Task has to wait */
+  os_tsk.run->waits = wait_flags;
+  rt_block (timeout, (U8)block_state);
+  return (OS_R_TMO);
+}
+
+
+/*--------------------------- rt_evt_set ------------------------------------*/
+
+void rt_evt_set (U16 event_flags, OS_TID task_id) {
+  /* Set one or more event flags of a selectable task. */
+  P_TCB p_tcb;
+
+  p_tcb = os_active_TCB[task_id-1U];
+  if (p_tcb == NULL) {
+    return;
+  }
+  p_tcb->events |= event_flags;
+  event_flags    = p_tcb->waits;
+  /* If the task is not waiting for an event, it should not be put */
+  /* to ready state. */
+  if (p_tcb->state == WAIT_AND) {
+    /* Check for AND-connected events */
+    if ((p_tcb->events & event_flags) == event_flags) {
+      goto wkup;
+    }
+  }
+  if (p_tcb->state == WAIT_OR) {
+    /* Check for OR-connected events */
+    if (p_tcb->events & event_flags) {
+      p_tcb->waits  &= p_tcb->events;
+wkup: p_tcb->events &= ~event_flags;
+      rt_rmv_dly (p_tcb);
+      p_tcb->state   = READY;
+#ifdef __CMSIS_RTOS
+      rt_ret_val2(p_tcb, 0x08U/*osEventSignal*/, p_tcb->waits);
+#else
+      rt_ret_val (p_tcb, OS_R_EVT);
+#endif
+      rt_dispatch (p_tcb);
+    }
+  }
+}
+
+
+/*--------------------------- rt_evt_clr ------------------------------------*/
+
+void rt_evt_clr (U16 clear_flags, OS_TID task_id) {
+  /* Clear one or more event flags (identified by "clear_flags") of a */
+  /* selectable task (identified by "task"). */
+  P_TCB task = os_active_TCB[task_id-1U];
+
+  if (task == NULL) {
+    return;
+  }
+  task->events &= ~clear_flags;
+}
+
+
+/*--------------------------- isr_evt_set -----------------------------------*/
+
+void isr_evt_set (U16 event_flags, OS_TID task_id) {
+  /* Same function as "os_evt_set", but to be called by ISRs. */
+  P_TCB p_tcb = os_active_TCB[task_id-1U];
+
+  if (p_tcb == NULL) {
+    return;
+  }
+  rt_psq_enq (p_tcb, event_flags);
+  rt_psh_req ();
+}
+
+
+/*--------------------------- rt_evt_get ------------------------------------*/
+
+U16 rt_evt_get (void) {
+  /* Get events of a running task after waiting for OR connected events. */
+  return (os_tsk.run->waits);
+}
+
+
+/*--------------------------- rt_evt_psh ------------------------------------*/
+
+void rt_evt_psh (P_TCB p_CB, U16 set_flags) {
+  /* Check if task has to be waken up */
+  U16 event_flags;
+
+  p_CB->events |= set_flags;
+  event_flags = p_CB->waits;
+  if (p_CB->state == WAIT_AND) {
+    /* Check for AND-connected events */
+    if ((p_CB->events & event_flags) == event_flags) {
+      goto rdy;
+    }
+  }
+  if (p_CB->state == WAIT_OR) {
+    /* Check for OR-connected events */
+    if (p_CB->events & event_flags) {
+      p_CB->waits  &= p_CB->events;
+rdy:  p_CB->events &= ~event_flags;
+      rt_rmv_dly (p_CB);
+      p_CB->state   = READY;
+#ifdef __CMSIS_RTOS
+      rt_ret_val2(p_CB, 0x08U/*osEventSignal*/, p_CB->waits); 
+#else
+      rt_ret_val (p_CB, OS_R_EVT);
+#endif
+      rt_put_prio (&os_rdy, p_CB);
+    }
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Event.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Event.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,51 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_EVENT.H
+ *      Purpose: Implements waits and wake-ups for event flags
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used 
+ *    to endorse or promote products derived from this software without 
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+extern OS_RESULT rt_evt_wait (U16 wait_flags,  U16 timeout, BOOL and_wait);
+extern void      rt_evt_set  (U16 event_flags, OS_TID task_id);
+extern void      rt_evt_clr  (U16 clear_flags, OS_TID task_id);
+extern void      isr_evt_set (U16 event_flags, OS_TID task_id);
+extern U16       rt_evt_get  (void);
+extern void      rt_evt_psh  (P_TCB p_CB, U16 set_flags);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_HAL_CM.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_HAL_CM.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,344 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_HAL_CM.H
+ *      Purpose: Hardware Abstraction Layer for Cortex-M definitions
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Definitions */
+#define INITIAL_xPSR    0x01000000U
+#define DEMCR_TRCENA    0x01000000U
+#define ITM_ITMENA      0x00000001U
+#define MAGIC_WORD      0xE25A2EA5U
+#define MAGIC_PATTERN   0xCCCCCCCCU
+
+#if defined (__CC_ARM)          /* ARM Compiler */
+
+#if ((defined(__TARGET_ARCH_7_M) || defined(__TARGET_ARCH_7E_M)) && !defined(NO_EXCLUSIVE_ACCESS))
+ #define __USE_EXCLUSIVE_ACCESS
+#else
+ #undef  __USE_EXCLUSIVE_ACCESS
+#endif
+
+/* Supress __ldrex and __strex deprecated warnings - "#3731-D: intrinsic is deprecated" */
+#ifdef __USE_EXCLUSIVE_ACCESS
+#pragma diag_suppress 3731
+#endif
+
+#ifndef __CMSIS_GENERIC
+
+__attribute__((always_inline)) static inline U32 __get_PRIMASK(void)
+{
+    register U32 primask __asm("primask");
+    return primask;
+}
+
+#define __DMB() do {\
+                   __schedule_barrier();\
+                   __dmb(0xF);\
+                   __schedule_barrier();\
+                } while (0)
+
+#endif
+
+#elif defined (__GNUC__)        /* GNU Compiler */
+
+#undef  __USE_EXCLUSIVE_ACCESS
+
+#if defined (__CORTEX_M0) || defined (__CORTEX_M0PLUS)
+#define __TARGET_ARCH_6S_M
+#endif
+
+#if defined (__VFP_FP__) && !defined(__SOFTFP__)
+#define __TARGET_FPU_VFP
+#endif
+
+#define __inline inline
+#define __weak   __attribute__((weak))
+
+#ifndef __CMSIS_GENERIC
+
+__attribute__((always_inline)) static inline U32 __get_PRIMASK(void)
+{
+  U32 result;
+
+  __asm volatile ("mrs %0, primask" : "=r" (result));
+  return result;
+}
+
+__attribute__((always_inline)) static inline void __enable_irq(void)
+{
+  __asm volatile ("cpsie i");
+}
+
+__attribute__((always_inline)) static inline U32 __disable_irq(void)
+{
+  U32 result;
+
+  __asm volatile ("mrs %0, primask" : "=r" (result));
+  __asm volatile ("cpsid i");
+  return(result & 1);
+}
+
+__attribute__((always_inline)) static inline void __DMB(void)
+{
+  __asm volatile ("dmb 0xF":::"memory");
+}
+
+#endif
+
+__attribute__(( always_inline)) static inline U8 __clz(U32 value)
+{
+  U8 result;
+
+  __asm volatile ("clz %0, %1" : "=r" (result) : "r" (value));
+  return(result);
+}
+
+#elif defined (__ICCARM__)      /* IAR Compiler */
+
+#undef  __USE_EXCLUSIVE_ACCESS
+
+#if (__CORE__ == __ARM6M__)
+#define __TARGET_ARCH_6S_M 1
+#endif
+
+#if defined __ARMVFP__
+#define __TARGET_FPU_VFP 1
+#endif
+
+#define __inline inline
+
+#ifndef __CMSIS_GENERIC
+
+static inline U32 __get_PRIMASK(void)
+{
+  U32 result;
+  
+  __asm volatile ("mrs %0, primask" : "=r" (result));
+  return result;
+}
+
+static inline void __enable_irq(void)
+{
+  __asm volatile ("cpsie i");
+}
+
+static inline U32 __disable_irq(void)
+{
+  U32 result;
+  
+  __asm volatile ("mrs %0, primask" : "=r" (result));
+  __asm volatile ("cpsid i");
+  return(result & 1);
+}
+
+#endif
+
+static inline U8 __clz(U32 value)
+{
+  U8 result;
+  
+  __asm volatile ("clz %0, %1" : "=r" (result) : "r" (value));
+  return(result);
+}
+
+#endif
+
+/* NVIC registers */
+#define NVIC_ST_CTRL    (*((volatile U32 *)0xE000E010U))
+#define NVIC_ST_RELOAD  (*((volatile U32 *)0xE000E014U))
+#define NVIC_ST_CURRENT (*((volatile U32 *)0xE000E018U))
+#define NVIC_ISER         ((volatile U32 *)0xE000E100U)
+#define NVIC_ICER         ((volatile U32 *)0xE000E180U)
+#if defined(__TARGET_ARCH_6S_M)
+#define NVIC_IP           ((volatile U32 *)0xE000E400U)
+#else
+#define NVIC_IP           ((volatile U8  *)0xE000E400U)
+#endif
+#define NVIC_INT_CTRL   (*((volatile U32 *)0xE000ED04U))
+#define NVIC_AIR_CTRL   (*((volatile U32 *)0xE000ED0CU))
+#define NVIC_SYS_PRI2   (*((volatile U32 *)0xE000ED1CU))
+#define NVIC_SYS_PRI3   (*((volatile U32 *)0xE000ED20U))
+
+#define OS_PEND_IRQ()   NVIC_INT_CTRL  = (1UL<<28)
+#define OS_PENDING      ((NVIC_INT_CTRL >> 26) & 5U)
+#define OS_UNPEND(fl)   NVIC_INT_CTRL  = (U32)(fl = (U8)OS_PENDING) << 25
+#define OS_PEND(fl,p)   NVIC_INT_CTRL  = (U32)(fl | (U8)(p<<2)) << 26
+#define OS_LOCK()       NVIC_ST_CTRL   =  0x0005U
+#define OS_UNLOCK()     NVIC_ST_CTRL   =  0x0007U
+
+#define OS_X_PENDING    ((NVIC_INT_CTRL >> 28) & 1U)
+#define OS_X_UNPEND(fl) NVIC_INT_CTRL  = (U32)(fl = (U8)OS_X_PENDING) << 27
+#define OS_X_PEND(fl,p) NVIC_INT_CTRL  = (U32)(fl | p) << 28
+#if defined(__TARGET_ARCH_6S_M)
+#define OS_X_INIT(n)    NVIC_IP[n>>2] |=  (U32)0xFFU << ((n & 0x03U) << 3); \
+                        NVIC_ISER[n>>5] = (U32)1U << (n & 0x1FU)
+#else
+#define OS_X_INIT(n)    NVIC_IP[n] = 0xFFU; \
+                        NVIC_ISER[n>>5] = (U32)1U << (n & 0x1FU)
+#endif
+#define OS_X_LOCK(n)    NVIC_ICER[n>>5] = (U32)1U << (n & 0x1FU)
+#define OS_X_UNLOCK(n)  NVIC_ISER[n>>5] = (U32)1U << (n & 0x1FU)
+
+/* Core Debug registers */
+#define DEMCR           (*((volatile U32 *)0xE000EDFCU))
+
+/* ITM registers */
+#define ITM_CONTROL     (*((volatile U32 *)0xE0000E80U))
+#define ITM_ENABLE      (*((volatile U32 *)0xE0000E00U))
+#define ITM_PORT30_U32  (*((volatile U32 *)0xE0000078U))
+#define ITM_PORT31_U32  (*((volatile U32 *)0xE000007CU))
+#define ITM_PORT31_U16  (*((volatile U16 *)0xE000007CU))
+#define ITM_PORT31_U8   (*((volatile U8  *)0xE000007CU))
+
+/* Variables */
+extern BIT dbg_msg;
+
+/* Functions */
+#ifdef __USE_EXCLUSIVE_ACCESS
+ #define rt_inc(p)     while(__strex((__ldrex(p)+1U),p))
+ #define rt_dec(p)     while(__strex((__ldrex(p)-1U),p))
+#else
+ #define rt_inc(p) do {\
+                     U32 primask = __get_PRIMASK();\
+                     __disable_irq();\
+                     (*p)++;\
+                     if (!primask) {\
+                       __enable_irq();\
+                     }\
+                   } while (0)
+ #define rt_dec(p) do {\
+                     U32 primask = __get_PRIMASK();\
+                     __disable_irq();\
+                     (*p)--;\
+                     if (!primask) {\
+                       __enable_irq();\
+                     }\
+                   } while (0)
+#endif
+
+__inline static U32 rt_inc_qi (U32 size, U8 *count, U8 *first) {
+  U32 cnt,c2;
+#ifdef __USE_EXCLUSIVE_ACCESS
+  do {
+    if ((cnt = __ldrex(count)) == size) {
+      __clrex();
+      return (cnt); }
+  } while (__strex(cnt+1U, count));
+  do {
+    c2 = (cnt = __ldrex(first)) + 1U;
+    if (c2 == size) { c2 = 0U; }
+  } while (__strex(c2, first));
+#else
+  U32 primask = __get_PRIMASK();
+  __disable_irq();
+  if ((cnt = *count) < size) {
+    *count = (U8)(cnt+1U);
+    c2 = (cnt = *first) + 1U;
+    if (c2 == size) { c2 = 0U; }
+    *first = (U8)c2; 
+  }
+  if (!primask) {
+    __enable_irq ();
+  }
+#endif
+  return (cnt);
+}
+
+__inline static void rt_systick_init (void) {
+  NVIC_ST_RELOAD  = os_trv;
+  NVIC_ST_CURRENT = 0U;
+  NVIC_ST_CTRL    = 0x0007U;
+  NVIC_SYS_PRI3  |= 0xFF000000U;
+}
+
+__inline static U32 rt_systick_val (void) {
+  return (os_trv - NVIC_ST_CURRENT);
+}
+
+__inline static U32 rt_systick_ovf (void) {
+  return ((NVIC_INT_CTRL >> 26) & 1U);
+}
+
+__inline static void rt_svc_init (void) {
+#if !defined(__TARGET_ARCH_6S_M)
+  U32 sh,prigroup;
+#endif
+  NVIC_SYS_PRI3 |= 0x00FF0000U;
+#if defined(__TARGET_ARCH_6S_M)
+  NVIC_SYS_PRI2 |= (NVIC_SYS_PRI3<<(8+1)) & 0xFC000000U;
+#else
+  sh       = 8U - __clz(~((NVIC_SYS_PRI3 << 8) & 0xFF000000U));
+  prigroup = ((NVIC_AIR_CTRL >> 8) & 0x07U);
+  if (prigroup >= sh) {
+    sh = prigroup + 1U;
+  }
+
+/* Only change the SVCall priority if uVisor is not present. */
+#if !(defined(FEATURE_UVISOR) && defined(TARGET_UVISOR_SUPPORTED))
+  NVIC_SYS_PRI2 = ((0xFEFFFFFFU << sh) & 0xFF000000U) | (NVIC_SYS_PRI2 & 0x00FFFFFFU);
+#endif /* !(defined(FEATURE_UVISOR) && defined(TARGET_UVISOR_SUPPORTED)) */
+#endif
+}
+
+extern void rt_set_PSP (U32 stack);
+extern U32  rt_get_PSP (void);
+extern void os_set_env (void);
+extern void *_alloc_box (void *box_mem);
+extern U32  _free_box (void *box_mem, void *box);
+
+extern void rt_init_stack (P_TCB p_TCB, FUNCP task_body);
+extern void rt_ret_val  (P_TCB p_TCB, U32 v0);
+extern void rt_ret_val2 (P_TCB p_TCB, U32 v0, U32 v1);
+
+extern void dbg_init (void);
+extern void dbg_task_notify (P_TCB p_tcb, BOOL create);
+extern void dbg_task_switch (U32 task_id);
+
+#ifdef DBG_MSG
+#define DBG_INIT() dbg_init()
+#define DBG_TASK_NOTIFY(p_tcb,create) if (dbg_msg) dbg_task_notify(p_tcb,create)
+#define DBG_TASK_SWITCH(task_id)      if (dbg_msg && (os_tsk.new_tsk!=os_tsk.run)) \
+                                        dbg_task_switch(task_id)
+#else
+#define DBG_INIT()
+#define DBG_TASK_NOTIFY(p_tcb,create)
+#define DBG_TASK_SWITCH(task_id)
+#endif
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_List.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_List.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,318 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_LIST.C
+ *      Purpose: Functions for the management of different lists
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#include "rt_Time.h"
+#include "rt_HAL_CM.h"
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+/* List head of chained ready tasks */
+struct OS_XCB  os_rdy;
+/* List head of chained delay tasks */
+struct OS_XCB  os_dly;
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_put_prio -----------------------------------*/
+
+void rt_put_prio (P_XCB p_CB, P_TCB p_task) {
+  /* Put task identified with "p_task" into list ordered by priority.       */
+  /* "p_CB" points to head of list; list has always an element at end with  */
+  /* a priority less than "p_task->prio".                                   */
+  P_TCB p_CB2;
+  U32 prio;
+  BOOL sem_mbx = __FALSE;
+
+  if ((p_CB->cb_type == SCB) || (p_CB->cb_type == MCB) || (p_CB->cb_type == MUCB)) {
+    sem_mbx = __TRUE;
+  }
+  prio = p_task->prio;
+  p_CB2 = p_CB->p_lnk;
+  /* Search for an entry in the list */
+  while ((p_CB2 != NULL) && (prio <= p_CB2->prio)) {
+    p_CB = (P_XCB)p_CB2;
+    p_CB2 = p_CB2->p_lnk;
+  }
+  /* Entry found, insert the task into the list */
+  p_task->p_lnk = p_CB2;
+  p_CB->p_lnk = p_task;
+  if (sem_mbx) {
+    if (p_CB2 != NULL) {
+      p_CB2->p_rlnk = p_task;
+    }
+    p_task->p_rlnk = (P_TCB)p_CB;
+  }
+  else {
+    p_task->p_rlnk = NULL;
+  }
+}
+
+
+/*--------------------------- rt_get_first ----------------------------------*/
+
+P_TCB rt_get_first (P_XCB p_CB) {
+  /* Get task at head of list: it is the task with highest priority. */
+  /* "p_CB" points to head of list. */
+  P_TCB p_first;
+
+  p_first = p_CB->p_lnk;
+  p_CB->p_lnk = p_first->p_lnk;
+  if ((p_CB->cb_type == SCB) || (p_CB->cb_type == MCB) || (p_CB->cb_type == MUCB)) {
+    if (p_first->p_lnk != NULL) {
+      p_first->p_lnk->p_rlnk = (P_TCB)p_CB;
+      p_first->p_lnk = NULL;
+    }
+    p_first->p_rlnk = NULL;
+  }
+  else {
+    p_first->p_lnk = NULL;
+  }
+  return (p_first);
+}
+
+
+/*--------------------------- rt_put_rdy_first ------------------------------*/
+
+void rt_put_rdy_first (P_TCB p_task) {
+  /* Put task identified with "p_task" at the head of the ready list. The   */
+  /* task must have at least a priority equal to highest priority in list.  */
+  p_task->p_lnk = os_rdy.p_lnk;
+  p_task->p_rlnk = NULL;
+  os_rdy.p_lnk = p_task;
+}
+
+
+/*--------------------------- rt_get_same_rdy_prio --------------------------*/
+
+P_TCB rt_get_same_rdy_prio (void) {
+  /* Remove a task of same priority from ready list if any exists. Other-   */
+  /* wise return NULL.                                                      */
+  P_TCB p_first;
+
+  p_first = os_rdy.p_lnk;
+  if (p_first->prio == os_tsk.run->prio) {
+    os_rdy.p_lnk = os_rdy.p_lnk->p_lnk;
+    return (p_first);
+  }
+  return (NULL);
+}
+
+
+/*--------------------------- rt_resort_prio --------------------------------*/
+
+void rt_resort_prio (P_TCB p_task) {
+  /* Re-sort ordered lists after the priority of 'p_task' has changed.      */
+  P_TCB p_CB;
+
+  if (p_task->p_rlnk == NULL) {
+    if (p_task->state == READY) {
+      /* Task is chained into READY list. */
+      p_CB = (P_TCB)&os_rdy;
+      goto res;
+    }
+  }
+  else {
+    p_CB = p_task->p_rlnk;
+    while (p_CB->cb_type == TCB) {
+      /* Find a header of this task chain list. */
+      p_CB = p_CB->p_rlnk;
+    }
+res:rt_rmv_list (p_task);
+    rt_put_prio ((P_XCB)p_CB, p_task);
+  }
+}
+
+
+/*--------------------------- rt_put_dly ------------------------------------*/
+
+void rt_put_dly (P_TCB p_task, U16 delay) {
+  /* Put a task identified with "p_task" into chained delay wait list using */
+  /* a delay value of "delay".                                              */
+  P_TCB p;
+  U32 delta,idelay = delay;
+
+  p = (P_TCB)&os_dly;
+  if (p->p_dlnk == NULL) {
+    /* Delay list empty */
+    delta = 0U;
+    goto last;
+  }
+  delta = os_dly.delta_time;
+  while (delta < idelay) {
+    if (p->p_dlnk == NULL) {
+      /* End of list found */
+last: p_task->p_dlnk = NULL;
+      p->p_dlnk = p_task;
+      p_task->p_blnk = p;
+      p->delta_time = (U16)(idelay - delta);
+      p_task->delta_time = 0U;
+      return;
+    }
+    p = p->p_dlnk;
+    delta += p->delta_time;
+  }
+  /* Right place found */
+  p_task->p_dlnk = p->p_dlnk;
+  p->p_dlnk = p_task;
+  p_task->p_blnk = p;
+  if (p_task->p_dlnk != NULL) {
+    p_task->p_dlnk->p_blnk = p_task;
+  }
+  p_task->delta_time = (U16)(delta - idelay);
+  p->delta_time -= p_task->delta_time;
+}
+
+
+/*--------------------------- rt_dec_dly ------------------------------------*/
+
+void rt_dec_dly (void) {
+  /* Decrement delta time of list head: remove tasks having a value of zero.*/
+  P_TCB p_rdy;
+
+  if (os_dly.p_dlnk == NULL) {
+    return;
+  }
+  os_dly.delta_time--;
+  while ((os_dly.delta_time == 0U) && (os_dly.p_dlnk != NULL)) {
+    p_rdy = os_dly.p_dlnk;
+    if (p_rdy->p_rlnk != NULL) {
+      /* Task is really enqueued, remove task from semaphore/mailbox */
+      /* timeout waiting list. */
+      p_rdy->p_rlnk->p_lnk = p_rdy->p_lnk;
+      if (p_rdy->p_lnk != NULL) {
+        p_rdy->p_lnk->p_rlnk = p_rdy->p_rlnk;
+        p_rdy->p_lnk = NULL;
+      }
+      p_rdy->p_rlnk = NULL;
+    }
+    rt_put_prio (&os_rdy, p_rdy);
+    os_dly.delta_time = p_rdy->delta_time;
+    if (p_rdy->state == WAIT_ITV) {
+      /* Calculate the next time for interval wait. */
+      p_rdy->delta_time = p_rdy->interval_time + (U16)os_time;
+    }
+    p_rdy->state   = READY;
+    os_dly.p_dlnk = p_rdy->p_dlnk;
+    if (p_rdy->p_dlnk != NULL) {
+      p_rdy->p_dlnk->p_blnk = (P_TCB)&os_dly;
+      p_rdy->p_dlnk = NULL;
+    }
+    p_rdy->p_blnk = NULL;
+  }
+}
+
+
+/*--------------------------- rt_rmv_list -----------------------------------*/
+
+void rt_rmv_list (P_TCB p_task) {
+  /* Remove task identified with "p_task" from ready, semaphore or mailbox  */
+  /* waiting list if enqueued.                                              */
+  P_TCB p_b;
+
+  if (p_task->p_rlnk != NULL) {
+    /* A task is enqueued in semaphore / mailbox waiting list. */
+    p_task->p_rlnk->p_lnk = p_task->p_lnk;
+    if (p_task->p_lnk != NULL) {
+      p_task->p_lnk->p_rlnk = p_task->p_rlnk;
+    }
+    return;
+  }
+
+  p_b = (P_TCB)&os_rdy;
+  while (p_b != NULL) {
+    /* Search the ready list for task "p_task" */
+    if (p_b->p_lnk == p_task) {
+      p_b->p_lnk = p_task->p_lnk;
+      return;
+    }
+    p_b = p_b->p_lnk;
+  }
+}
+
+
+/*--------------------------- rt_rmv_dly ------------------------------------*/
+
+void rt_rmv_dly (P_TCB p_task) {
+  /* Remove task identified with "p_task" from delay list if enqueued.      */
+  P_TCB p_b;
+
+  p_b = p_task->p_blnk;
+  if (p_b != NULL) {
+    /* Task is really enqueued */
+    p_b->p_dlnk = p_task->p_dlnk;
+    if (p_task->p_dlnk != NULL) {
+      /* 'p_task' is in the middle of list */
+      p_b->delta_time += p_task->delta_time;
+      p_task->p_dlnk->p_blnk = p_b;
+      p_task->p_dlnk = NULL;
+    }
+    else {
+      /* 'p_task' is at the end of list */
+      p_b->delta_time = 0U;
+    }
+    p_task->p_blnk = NULL;
+  }
+}
+
+
+/*--------------------------- rt_psq_enq ------------------------------------*/
+
+void rt_psq_enq (OS_ID entry, U32 arg) {
+  /* Insert post service request "entry" into ps-queue. */
+  U32 idx;
+
+  idx = rt_inc_qi (os_psq->size, &os_psq->count, &os_psq->first);
+  if (idx < os_psq->size) {
+    os_psq->q[idx].id  = entry;
+    os_psq->q[idx].arg = arg;
+  }
+  else {
+    os_error (OS_ERR_FIFO_OVF);
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_List.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_List.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,72 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_LIST.H
+ *      Purpose: Functions for the management of different lists
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Definitions */
+
+/* Values for 'cb_type' */
+#define TCB             0U
+#define MCB             1U
+#define SCB             2U
+#define MUCB            3U
+#define HCB             4U
+
+/* Variables */
+extern struct OS_XCB os_rdy;
+extern struct OS_XCB os_dly;
+
+/* Functions */
+extern void  rt_put_prio      (P_XCB p_CB, P_TCB p_task);
+extern P_TCB rt_get_first     (P_XCB p_CB);
+extern void  rt_put_rdy_first (P_TCB p_task);
+extern P_TCB rt_get_same_rdy_prio (void);
+extern void  rt_resort_prio   (P_TCB p_task);
+extern void  rt_put_dly       (P_TCB p_task, U16 delay);
+extern void  rt_dec_dly       (void);
+extern void  rt_rmv_list      (P_TCB p_task);
+extern void  rt_rmv_dly       (P_TCB p_task);
+extern void  rt_psq_enq       (OS_ID entry, U32 arg);
+
+/* This is a fast macro generating in-line code */
+#define rt_rdy_prio(void) (os_rdy.p_lnk->prio)
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Mailbox.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Mailbox.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,293 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MAILBOX.C
+ *      Purpose: Implements waits and wake-ups for mailbox messages
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_List.h"
+#include "rt_Mailbox.h"
+#include "rt_MemBox.h"
+#include "rt_Task.h"
+#include "rt_HAL_CM.h"
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_mbx_init -----------------------------------*/
+
+void rt_mbx_init (OS_ID mailbox, U16 mbx_size) {
+  /* Initialize a mailbox */
+  P_MCB p_MCB = mailbox;
+
+  p_MCB->cb_type = MCB;
+  p_MCB->state   = 0U;
+  p_MCB->isr_st  = 0U;
+  p_MCB->p_lnk   = NULL;
+  p_MCB->first   = 0U;
+  p_MCB->last    = 0U;
+  p_MCB->count   = 0U;
+  p_MCB->size    = (U16)((mbx_size - (sizeof(struct OS_MCB) - (sizeof(void *))))
+                         / sizeof(void *));
+}
+
+
+/*--------------------------- rt_mbx_send -----------------------------------*/
+
+OS_RESULT rt_mbx_send (OS_ID mailbox, void *p_msg, U16 timeout) {
+  /* Send message to a mailbox */
+  P_MCB p_MCB = mailbox;
+  P_TCB p_TCB;
+
+  if ((p_MCB->p_lnk != NULL) && (p_MCB->state == 1U)) {
+    /* A task is waiting for message */
+    p_TCB = rt_get_first ((P_XCB)p_MCB);
+#ifdef __CMSIS_RTOS
+    rt_ret_val2(p_TCB, 0x10U/*osEventMessage*/, (U32)p_msg);
+#else
+    *p_TCB->msg = p_msg;
+    rt_ret_val (p_TCB, OS_R_MBX);
+#endif
+    rt_rmv_dly (p_TCB);
+    rt_dispatch (p_TCB);
+  }
+  else {
+    /* Store message in mailbox queue */
+    if (p_MCB->count == p_MCB->size) {
+      /* No free message entry, wait for one. If message queue is full, */
+      /* then no task is waiting for message. The 'p_MCB->p_lnk' list   */
+      /* pointer can now be reused for send message waits task list.    */
+      if (timeout == 0U) {
+        return (OS_R_TMO);
+      }
+      if (p_MCB->p_lnk != NULL) {
+        rt_put_prio ((P_XCB)p_MCB, os_tsk.run);
+      }
+      else {
+        p_MCB->p_lnk = os_tsk.run;
+        os_tsk.run->p_lnk  = NULL;
+        os_tsk.run->p_rlnk = (P_TCB)p_MCB;
+        /* Task is waiting to send a message */      
+        p_MCB->state = 2U;
+      }
+      os_tsk.run->msg = p_msg;
+      rt_block (timeout, WAIT_MBX);
+      return (OS_R_TMO);
+    }
+    /* Yes, there is a free entry in a mailbox. */
+    p_MCB->msg[p_MCB->first] = p_msg;
+    rt_inc (&p_MCB->count);
+    if (++p_MCB->first == p_MCB->size) {
+      p_MCB->first = 0U;
+    }
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_mbx_wait -----------------------------------*/
+
+OS_RESULT rt_mbx_wait (OS_ID mailbox, void **message, U16 timeout) {
+  /* Receive a message; possibly wait for it */
+  P_MCB p_MCB = mailbox;
+  P_TCB p_TCB;
+
+  /* If a message is available in the fifo buffer */
+  /* remove it from the fifo buffer and return. */
+  if (p_MCB->count) {
+    *message = p_MCB->msg[p_MCB->last];
+    if (++p_MCB->last == p_MCB->size) {
+      p_MCB->last = 0U;
+    }
+    if ((p_MCB->p_lnk != NULL) && (p_MCB->state == 2U)) {
+      /* A task is waiting to send message */
+      p_TCB = rt_get_first ((P_XCB)p_MCB);
+#ifdef __CMSIS_RTOS
+      rt_ret_val(p_TCB, 0U/*osOK*/);
+#else
+      rt_ret_val(p_TCB, OS_R_OK);
+#endif
+      p_MCB->msg[p_MCB->first] = p_TCB->msg;
+      if (++p_MCB->first == p_MCB->size) {
+        p_MCB->first = 0U;
+      }
+      rt_rmv_dly (p_TCB);
+      rt_dispatch (p_TCB);
+    }
+    else {
+      rt_dec (&p_MCB->count);
+    }
+    return (OS_R_OK);
+  }
+  /* No message available: wait for one */
+  if (timeout == 0U) {
+    return (OS_R_TMO);
+  }
+  if (p_MCB->p_lnk != NULL) {
+    rt_put_prio ((P_XCB)p_MCB, os_tsk.run);
+  }
+  else {
+    p_MCB->p_lnk = os_tsk.run;
+    os_tsk.run->p_lnk = NULL;
+    os_tsk.run->p_rlnk = (P_TCB)p_MCB;
+    /* Task is waiting to receive a message */      
+    p_MCB->state = 1U;
+  }
+  rt_block(timeout, WAIT_MBX);
+#ifndef __CMSIS_RTOS
+  os_tsk.run->msg = message;
+#endif
+  return (OS_R_TMO);
+}
+
+
+/*--------------------------- rt_mbx_check ----------------------------------*/
+
+OS_RESULT rt_mbx_check (OS_ID mailbox) {
+  /* Check for free space in a mailbox. Returns the number of messages     */
+  /* that can be stored to a mailbox. It returns 0 when mailbox is full.   */
+  P_MCB p_MCB = mailbox;
+
+  return ((U32)(p_MCB->size - p_MCB->count));
+}
+
+
+/*--------------------------- isr_mbx_send ----------------------------------*/
+
+void isr_mbx_send (OS_ID mailbox, void *p_msg) {
+  /* Same function as "os_mbx_send", but to be called by ISRs. */
+  P_MCB p_MCB = mailbox;
+
+  rt_psq_enq (p_MCB, (U32)p_msg);
+  rt_psh_req ();
+}
+
+
+/*--------------------------- isr_mbx_receive -------------------------------*/
+
+OS_RESULT isr_mbx_receive (OS_ID mailbox, void **message) {
+  /* Receive a message in the interrupt function. The interrupt function   */
+  /* should not wait for a message since this would block the rtx os.      */
+  P_MCB p_MCB = mailbox;
+
+  if (p_MCB->count) {
+    /* A message is available in the fifo buffer. */
+    *message = p_MCB->msg[p_MCB->last];
+    if (p_MCB->state == 2U) {
+      /* A task is locked waiting to send message */
+      rt_psq_enq (p_MCB, 0U);
+      rt_psh_req ();
+    }
+    rt_dec (&p_MCB->count);
+    if (++p_MCB->last == p_MCB->size) {
+      p_MCB->last = 0U;
+    }
+    return (OS_R_MBX);
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_mbx_psh ------------------------------------*/
+
+void rt_mbx_psh (P_MCB p_CB, void *p_msg) {
+  /* Store the message to the mailbox queue or pass it to task directly. */
+  P_TCB p_TCB;
+  void *mem;
+
+  if (p_CB->p_lnk != NULL) switch (p_CB->state) {
+#ifdef __CMSIS_RTOS
+    case 3:
+      /* Task is waiting to allocate memory, remove it from the waiting list */
+      mem = rt_alloc_box(p_msg);
+      if (mem == NULL) { break; }
+      p_TCB = rt_get_first ((P_XCB)p_CB);
+      rt_ret_val(p_TCB, (U32)mem);
+      p_TCB->state = READY;
+      rt_rmv_dly (p_TCB);
+      rt_put_prio (&os_rdy, p_TCB);
+      break;
+#endif
+    case 2:
+      /* Task is waiting to send a message, remove it from the waiting list */
+      p_TCB = rt_get_first ((P_XCB)p_CB);
+#ifdef __CMSIS_RTOS
+      rt_ret_val(p_TCB, 0U/*osOK*/);
+#else
+      rt_ret_val(p_TCB, OS_R_OK);
+#endif
+      p_CB->msg[p_CB->first] = p_TCB->msg;
+      rt_inc (&p_CB->count);
+      if (++p_CB->first == p_CB->size) {
+        p_CB->first = 0U;
+      }
+      p_TCB->state = READY;
+      rt_rmv_dly (p_TCB);
+      rt_put_prio (&os_rdy, p_TCB);
+      break;
+    case 1:
+      /* Task is waiting for a message, pass the message to the task directly */
+      p_TCB = rt_get_first ((P_XCB)p_CB);
+#ifdef __CMSIS_RTOS
+      rt_ret_val2(p_TCB, 0x10U/*osEventMessage*/, (U32)p_msg);
+#else
+      *p_TCB->msg = p_msg;
+      rt_ret_val (p_TCB, OS_R_MBX);
+#endif
+      p_TCB->state = READY;
+      rt_rmv_dly (p_TCB);
+      rt_put_prio (&os_rdy, p_TCB);
+      break;
+    default:
+      break;
+  } else {
+    /* No task is waiting for a message, store it to the mailbox queue */
+    if (p_CB->count < p_CB->size) {
+      p_CB->msg[p_CB->first] = p_msg;
+      rt_inc (&p_CB->count);
+      if (++p_CB->first == p_CB->size) {
+        p_CB->first = 0U;
+      }
+    }
+    else {
+      os_error (OS_ERR_MBX_OVF);
+    }
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Mailbox.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Mailbox.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,53 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MAILBOX.H
+ *      Purpose: Implements waits and wake-ups for mailbox messages
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+extern void      rt_mbx_init  (OS_ID mailbox, U16 mbx_size);
+extern OS_RESULT rt_mbx_send  (OS_ID mailbox, void *p_msg,    U16 timeout);
+extern OS_RESULT rt_mbx_wait  (OS_ID mailbox, void **message, U16 timeout);
+extern OS_RESULT rt_mbx_check (OS_ID mailbox);
+extern void      isr_mbx_send (OS_ID mailbox, void *p_msg);
+extern OS_RESULT isr_mbx_receive (OS_ID mailbox, void **message);
+extern void      rt_mbx_psh   (P_MCB p_CB,    void *p_msg);
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_MemBox.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_MemBox.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,168 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MEMBOX.C
+ *      Purpose: Interface functions for fixed memory block management system
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_MemBox.h"
+#include "rt_HAL_CM.h"
+
+/*----------------------------------------------------------------------------
+ *      Global Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- _init_box -------------------------------------*/
+
+U32 _init_box  (void *box_mem, U32 box_size, U32 blk_size) {
+  /* Initialize memory block system, returns 0 if OK, 1 if fails. */
+  void *end;
+  void *blk;
+  void *next;
+  U32  sizeof_bm;
+
+  /* Create memory structure. */
+  if (blk_size & BOX_ALIGN_8) {
+    /* Memory blocks 8-byte aligned. */ 
+    blk_size = ((blk_size & ~BOX_ALIGN_8) + 7U) & ~(U32)7U;
+    sizeof_bm = (sizeof (struct OS_BM) + 7U) & ~(U32)7U;
+  }
+  else {
+    /* Memory blocks 4-byte aligned. */
+    blk_size = (blk_size + 3U) & ~(U32)3U;
+    sizeof_bm = sizeof (struct OS_BM);
+  }
+  if (blk_size == 0U) {
+    return (1U);
+  }
+  if ((blk_size + sizeof_bm) > box_size) {
+    return (1U);
+  }
+  /* Create a Memory structure. */
+  blk = ((U8 *) box_mem) + sizeof_bm;
+  ((P_BM) box_mem)->free = blk;
+  end = ((U8 *) box_mem) + box_size;
+  ((P_BM) box_mem)->end      = end;
+  ((P_BM) box_mem)->blk_size = blk_size;
+
+  /* Link all free blocks using offsets. */
+  end = ((U8 *) end) - blk_size;
+  while (1)  {
+    next = ((U8 *) blk) + blk_size;
+    if (next > end) { break; }
+    *((void **)blk) = next;
+    blk = next;
+  }
+  /* end marker */
+  *((void **)blk) = 0U;
+  return (0U);
+}
+
+/*--------------------------- rt_alloc_box ----------------------------------*/
+
+void *rt_alloc_box (void *box_mem) {
+  /* Allocate a memory block and return start address. */
+  void **free;
+#ifndef __USE_EXCLUSIVE_ACCESS
+  U32  irq_mask;
+
+  irq_mask = (U32)__disable_irq ();
+  free = ((P_BM) box_mem)->free;
+  if (free) {
+    ((P_BM) box_mem)->free = *free;
+  }
+  if (irq_mask == 0U) { __enable_irq (); }
+#else
+  do {
+    if ((free = (void **)__ldrex(&((P_BM) box_mem)->free)) == 0U) {
+      __clrex();
+      break;
+    }
+  } while (__strex((U32)*free, &((P_BM) box_mem)->free));
+#endif
+  return (free);
+}
+
+
+/*--------------------------- _calloc_box -----------------------------------*/
+
+void *_calloc_box (void *box_mem)  {
+  /* Allocate a 0-initialized memory block and return start address. */
+  void *free;
+  U32 *p;
+  U32 i;
+
+  free = _alloc_box (box_mem);
+  if (free)  {
+    p = free;
+    for (i = ((P_BM) box_mem)->blk_size; i; i -= 4U)  {
+      *p = 0U;
+      p++;
+    }
+  }
+  return (free);
+}
+
+
+/*--------------------------- rt_free_box -----------------------------------*/
+
+U32 rt_free_box (void *box_mem, void *box) {
+  /* Free a memory block, returns 0 if OK, 1 if box does not belong to box_mem */
+#ifndef __USE_EXCLUSIVE_ACCESS
+  U32 irq_mask;
+#endif
+
+  if ((box < box_mem) || (box >= ((P_BM) box_mem)->end)) {
+    return (1U);
+  }
+
+#ifndef __USE_EXCLUSIVE_ACCESS
+  irq_mask = (U32)__disable_irq ();
+  *((void **)box) = ((P_BM) box_mem)->free;
+  ((P_BM) box_mem)->free = box;
+  if (irq_mask == 0U) { __enable_irq (); }
+#else
+  do {
+    do {
+      *((void **)box) = ((P_BM) box_mem)->free;
+      __DMB();
+    } while (*(void**)box != (void *)__ldrex(&((P_BM) box_mem)->free));
+  } while (__strex ((U32)box, &((P_BM) box_mem)->free));
+#endif
+  return (0U);
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_MemBox.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_MemBox.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,50 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MEMBOX.H
+ *      Purpose: Interface functions for fixed memory block management system
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+#define rt_init_box     _init_box
+#define rt_calloc_box   _calloc_box
+extern U32     _init_box   (void *box_mem, U32 box_size, U32 blk_size);
+extern void *rt_alloc_box  (void *box_mem);
+extern void *  _calloc_box (void *box_mem);
+extern U32   rt_free_box   (void *box_mem, void *box);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Memory.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Memory.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,140 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MEMORY.C
+ *      Purpose: Interface functions for Dynamic Memory Management System
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used 
+ *    to endorse or promote products derived from this software without 
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "rt_Memory.h"
+
+
+/* Functions */
+
+// Initialize Dynamic Memory pool
+//   Parameters:
+//     pool:    Pointer to memory pool
+//     size:    Size of memory pool in bytes
+//   Return:    0 - OK, 1 - Error
+
+U32 rt_init_mem (void *pool, U32 size) {
+  MEMP *ptr;
+
+  if ((pool == NULL) || (size < sizeof(MEMP))) { return (1U); }
+
+  ptr = (MEMP *)pool;
+  ptr->next = (MEMP *)((U32)pool + size - sizeof(MEMP *));
+  ptr->next->next = NULL;
+  ptr->len = 0U; 
+
+  return (0U);
+}
+
+// Allocate Memory from Memory pool
+//   Parameters:
+//     pool:    Pointer to memory pool
+//     size:    Size of memory in bytes to allocate
+//   Return:    Pointer to allocated memory
+
+void *rt_alloc_mem (void *pool, U32 size) {
+  MEMP *p, *p_search, *p_new;
+  U32   hole_size;
+
+  if ((pool == NULL) || (size == 0U)) { return NULL; }
+
+  /* Add header offset to 'size' */
+  size += sizeof(MEMP);
+  /* Make sure that block is 4-byte aligned  */
+  size = (size + 3U) & ~(U32)3U;
+
+  p_search = (MEMP *)pool;
+  while (1) {
+    hole_size  = (U32)p_search->next - (U32)p_search;
+    hole_size -= p_search->len;
+    /* Check if hole size is big enough */
+    if (hole_size >= size) { break; }
+    p_search = p_search->next;
+    if (p_search->next == NULL) {
+      /* Failed, we are at the end of the list */
+      return NULL;
+    }
+  }
+
+  if (p_search->len == 0U) {
+    /* No block is allocated, set the Length of the first element */
+    p_search->len = size;
+    p = (MEMP *)(((U32)p_search) + sizeof(MEMP));
+  } else {
+    /* Insert new list element into the memory list */
+    p_new       = (MEMP *)((U32)p_search + p_search->len);
+    p_new->next = p_search->next;
+    p_new->len  = size;
+    p_search->next = p_new;
+    p = (MEMP *)(((U32)p_new) + sizeof(MEMP));
+  }
+
+  return (p);
+}
+
+// Free Memory and return it to Memory pool
+//   Parameters:
+//     pool:    Pointer to memory pool
+//     mem:     Pointer to memory to free
+//   Return:    0 - OK, 1 - Error
+
+U32 rt_free_mem (void *pool, void *mem) {
+  MEMP *p_search, *p_prev, *p_return;
+
+  if ((pool == NULL) || (mem == NULL)) { return (1U); }
+
+  p_return = (MEMP *)((U32)mem - sizeof(MEMP));
+  
+  /* Set list header */
+  p_prev = NULL;
+  p_search = (MEMP *)pool;
+  while (p_search != p_return) {
+    p_prev   = p_search;
+    p_search = p_search->next;
+    if (p_search == NULL) {
+      /* Valid Memory block not found */
+      return (1U);
+    }
+  }
+
+  if (p_prev == NULL) {
+    /* First block to be released, only set length to 0 */
+    p_search->len = 0U;
+  } else {
+    /* Discard block from chain list */
+    p_prev->next = p_search->next;
+  }
+
+  return (0U);
+}
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Memory.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Memory.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,49 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MEMORY.H
+ *      Purpose: Interface functions for Dynamic Memory Management System
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used 
+ *    to endorse or promote products derived from this software without 
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Types */
+typedef struct mem {              /* << Memory Pool management struct >>     */
+  struct mem *next;               /* Next Memory Block in the list           */
+  U32         len;                /* Length of data block                    */
+} MEMP;
+
+/* Functions */
+extern U32   rt_init_mem  (void *pool, U32  size);
+extern void *rt_alloc_mem (void *pool, U32  size);
+extern U32   rt_free_mem  (void *pool, void *mem);
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Mutex.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Mutex.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,259 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MUTEX.C
+ *      Purpose: Implements mutex synchronization objects
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#include "rt_Mutex.h"
+#include "rt_HAL_CM.h"
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_mut_init -----------------------------------*/
+
+void rt_mut_init (OS_ID mutex) {
+  /* Initialize a mutex object */
+  P_MUCB p_MCB = mutex;
+
+  p_MCB->cb_type = MUCB;
+  p_MCB->level   = 0U;
+  p_MCB->p_lnk   = NULL;
+  p_MCB->owner   = NULL;
+  p_MCB->p_mlnk  = NULL;
+}
+
+
+/*--------------------------- rt_mut_delete ---------------------------------*/
+
+#ifdef __CMSIS_RTOS
+OS_RESULT rt_mut_delete (OS_ID mutex) {
+  /* Delete a mutex object */
+  P_MUCB p_MCB = mutex;
+  P_TCB  p_TCB;
+  P_MUCB p_mlnk;
+  U8     prio;
+
+  if (p_MCB->level != 0U) {
+
+    p_TCB = p_MCB->owner;
+
+    /* Remove mutex from task mutex owner list. */
+    p_mlnk = p_TCB->p_mlnk;
+    if (p_mlnk == p_MCB) {
+      p_TCB->p_mlnk = p_MCB->p_mlnk;
+    }
+    else {
+      while (p_mlnk) {
+        if (p_mlnk->p_mlnk == p_MCB) {
+          p_mlnk->p_mlnk = p_MCB->p_mlnk;
+          break;
+        }
+        p_mlnk = p_mlnk->p_mlnk;
+      }
+    }
+
+    /* Restore owner task's priority. */
+    prio = p_TCB->prio_base;
+    p_mlnk = p_TCB->p_mlnk;
+    while (p_mlnk) {
+      if ((p_mlnk->p_lnk != NULL) && (p_mlnk->p_lnk->prio > prio)) {
+        /* A task with higher priority is waiting for mutex. */
+        prio = p_mlnk->p_lnk->prio;
+      }
+      p_mlnk = p_mlnk->p_mlnk;
+    }
+    if (p_TCB->prio != prio) {
+      p_TCB->prio = prio;
+      if (p_TCB != os_tsk.run) {
+        rt_resort_prio (p_TCB);
+      }
+    }
+
+  }
+
+  while (p_MCB->p_lnk != NULL) {
+    /* A task is waiting for mutex. */
+    p_TCB = rt_get_first ((P_XCB)p_MCB);
+    rt_ret_val(p_TCB, 0U/*osOK*/);
+    rt_rmv_dly(p_TCB);
+    p_TCB->state = READY;
+    rt_put_prio (&os_rdy, p_TCB);
+  }
+
+  if ((os_rdy.p_lnk != NULL) && (os_rdy.p_lnk->prio > os_tsk.run->prio)) {
+    /* preempt running task */
+    rt_put_prio (&os_rdy, os_tsk.run);
+    os_tsk.run->state = READY;
+    rt_dispatch (NULL);
+  }
+
+  p_MCB->cb_type = 0U;
+
+  return (OS_R_OK);
+}
+#endif
+
+
+/*--------------------------- rt_mut_release --------------------------------*/
+
+OS_RESULT rt_mut_release (OS_ID mutex) {
+  /* Release a mutex object */
+  P_MUCB p_MCB = mutex;
+  P_TCB  p_TCB;
+  P_MUCB p_mlnk;
+  U8     prio;
+
+  if ((p_MCB->level == 0U) || (p_MCB->owner != os_tsk.run)) {
+    /* Unbalanced mutex release or task is not the owner */
+    return (OS_R_NOK);
+  }
+  if (--p_MCB->level != 0U) {
+    return (OS_R_OK);
+  }
+
+  /* Remove mutex from task mutex owner list. */
+  p_mlnk = os_tsk.run->p_mlnk;
+  if (p_mlnk == p_MCB) {
+    os_tsk.run->p_mlnk = p_MCB->p_mlnk;
+  }
+  else {
+    while (p_mlnk) {
+      if (p_mlnk->p_mlnk == p_MCB) {
+        p_mlnk->p_mlnk = p_MCB->p_mlnk;
+        break;
+      }
+      p_mlnk = p_mlnk->p_mlnk;
+    }
+  }
+
+  /* Restore owner task's priority. */
+  prio = os_tsk.run->prio_base;
+  p_mlnk = os_tsk.run->p_mlnk;
+  while (p_mlnk) {
+    if ((p_mlnk->p_lnk != NULL) && (p_mlnk->p_lnk->prio > prio)) {
+      /* A task with higher priority is waiting for mutex. */
+      prio = p_mlnk->p_lnk->prio;
+    }
+    p_mlnk = p_mlnk->p_mlnk;
+  }
+  os_tsk.run->prio = prio;
+
+  if (p_MCB->p_lnk != NULL) {
+    /* A task is waiting for mutex. */
+    p_TCB = rt_get_first ((P_XCB)p_MCB);
+#ifdef __CMSIS_RTOS
+    rt_ret_val(p_TCB, 0U/*osOK*/);
+#else
+    rt_ret_val(p_TCB, OS_R_MUT); 
+#endif
+    rt_rmv_dly (p_TCB);
+    /* A waiting task becomes the owner of this mutex. */
+    p_MCB->level  = 1U;
+    p_MCB->owner  = p_TCB;
+    p_MCB->p_mlnk = p_TCB->p_mlnk;
+    p_TCB->p_mlnk = p_MCB; 
+    /* Priority inversion, check which task continues. */
+    if (os_tsk.run->prio >= rt_rdy_prio()) {
+      rt_dispatch (p_TCB);
+    }
+    else {
+      /* Ready task has higher priority than running task. */
+      rt_put_prio (&os_rdy, os_tsk.run);
+      rt_put_prio (&os_rdy, p_TCB);
+      os_tsk.run->state = READY;
+      p_TCB->state      = READY;
+      rt_dispatch (NULL);
+    }
+  }
+  else {
+    /* Check if own priority lowered by priority inversion. */
+    if (rt_rdy_prio() > os_tsk.run->prio) {
+      rt_put_prio (&os_rdy, os_tsk.run);
+      os_tsk.run->state = READY;
+      rt_dispatch (NULL);
+    }
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_mut_wait -----------------------------------*/
+
+OS_RESULT rt_mut_wait (OS_ID mutex, U16 timeout) {
+  /* Wait for a mutex, continue when mutex is free. */
+  P_MUCB p_MCB = mutex;
+
+  if (p_MCB->level == 0U) {
+    p_MCB->owner  = os_tsk.run;
+    p_MCB->p_mlnk = os_tsk.run->p_mlnk;
+    os_tsk.run->p_mlnk = p_MCB; 
+    goto inc;
+  }
+  if (p_MCB->owner == os_tsk.run) {
+    /* OK, running task is the owner of this mutex. */
+inc:p_MCB->level++;
+    return (OS_R_OK);
+  }
+  /* Mutex owned by another task, wait until released. */
+  if (timeout == 0U) {
+    return (OS_R_TMO);
+  }
+  /* Raise the owner task priority if lower than current priority. */
+  /* This priority inversion is called priority inheritance.       */
+  if (p_MCB->owner->prio < os_tsk.run->prio) {
+    p_MCB->owner->prio = os_tsk.run->prio;
+    rt_resort_prio (p_MCB->owner);
+  }
+  if (p_MCB->p_lnk != NULL) {
+    rt_put_prio ((P_XCB)p_MCB, os_tsk.run);
+  }
+  else {
+    p_MCB->p_lnk = os_tsk.run;
+    os_tsk.run->p_lnk  = NULL;
+    os_tsk.run->p_rlnk = (P_TCB)p_MCB;
+  }
+  rt_block(timeout, WAIT_MUT);
+  return (OS_R_TMO);
+}
+
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Mutex.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Mutex.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,49 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_MUTEX.H
+ *      Purpose: Implements mutex synchronization objects
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+extern void      rt_mut_init    (OS_ID mutex);
+extern OS_RESULT rt_mut_delete  (OS_ID mutex);
+extern OS_RESULT rt_mut_release (OS_ID mutex);
+extern OS_RESULT rt_mut_wait    (OS_ID mutex, U16 timeout);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_OsEventObserver.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_OsEventObserver.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,61 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    rt_OsEventObserver.c
+ *      Purpose: OS Event Callbacks for CMSIS RTOS
+ *      Rev.:    VX.XX
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_OsEventObserver.h"
+
+/*
+ *  _____ _____  ____  __ _____
+ * |  ___|_ _\ \/ /  \/  | ____|
+ * | |_   | | \  /| |\/| |  _|
+ * |  _|  | | /  \| |  | | |___
+ * |_|   |___/_/\_\_|  |_|_____|
+ *
+ * FIXME:
+ * The osEventObs variable must be in protected memory. If not every box
+ * and box 0 can modify osEventObs to point to any handler to run code
+ * privileged. This issue is tracked at
+ * <https://github.com/ARMmbed/uvisor/issues/235>.
+ */
+const OsEventObserver *osEventObs;
+
+void osRegisterForOsEvents(const OsEventObserver *observer)
+{
+    static uint8_t has_been_called = 0;
+    if (has_been_called) {
+        return;
+    }
+    has_been_called = 1;
+
+    osEventObs = observer;
+}
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_OsEventObserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_OsEventObserver.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,63 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    os_events.h
+ *      Purpose: OS Event Callbacks for CMSIS RTOS
+ *      Rev.:    VX.XX
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2016 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+#ifndef _RT_OS_EVENT_OBSERVER_H
+#define _RT_OS_EVENT_OBSERVER_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+    uint32_t version;
+    void (*pre_start)(void);
+    void *(*thread_create)(int thread_id, void *context);
+    void (*thread_destroy)(void *context);
+    void (*thread_switch)(void *context);
+} OsEventObserver;
+extern const OsEventObserver *osEventObs;
+
+void osRegisterForOsEvents(const OsEventObserver *observer);
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Robin.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Robin.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,83 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_ROBIN.C
+ *      Purpose: Round Robin Task switching
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#include "rt_Time.h"
+#include "rt_Robin.h"
+#include "rt_HAL_CM.h"
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+struct OS_ROBIN os_robin;
+
+
+/*----------------------------------------------------------------------------
+ *      Global Functions
+ *---------------------------------------------------------------------------*/
+
+/*--------------------------- rt_init_robin ---------------------------------*/
+
+__weak void rt_init_robin (void) {
+  /* Initialize Round Robin variables. */
+  os_robin.task = NULL;
+  os_robin.tout = (U16)os_rrobin;
+}
+
+/*--------------------------- rt_chk_robin ----------------------------------*/
+
+__weak void rt_chk_robin (void) {
+  /* Check if Round Robin timeout expired and switch to the next ready task.*/
+  P_TCB p_new;
+
+  if (os_robin.task != os_rdy.p_lnk) {
+    /* New task was suspended, reset Round Robin timeout. */
+    os_robin.task = os_rdy.p_lnk;
+    os_robin.time = (U16)os_time + os_robin.tout - 1U;
+  }
+  if (os_robin.time == (U16)os_time) {
+    /* Round Robin timeout has expired, swap Robin tasks. */
+    os_robin.task = NULL;
+    p_new = rt_get_first (&os_rdy);
+    rt_put_prio ((P_XCB)&os_rdy, p_new);
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Robin.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Robin.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,50 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_ROBIN.H
+ *      Purpose: Round Robin Task switching definitions
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Variables */
+extern struct OS_ROBIN os_robin;
+
+/* Functions */
+extern void rt_init_robin (void);
+extern void rt_chk_robin  (void);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Semaphore.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Semaphore.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,182 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_SEMAPHORE.C
+ *      Purpose: Implements binary and counting semaphores
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_List.h"
+#include "rt_Task.h"
+#include "rt_Semaphore.h"
+#include "rt_HAL_CM.h"
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_sem_init -----------------------------------*/
+
+void rt_sem_init (OS_ID semaphore, U16 token_count) {
+  /* Initialize a semaphore */
+  P_SCB p_SCB = semaphore;
+
+  p_SCB->cb_type = SCB;
+  p_SCB->p_lnk  = NULL;
+  p_SCB->tokens = token_count;
+}
+
+
+/*--------------------------- rt_sem_delete ---------------------------------*/
+
+#ifdef __CMSIS_RTOS
+OS_RESULT rt_sem_delete (OS_ID semaphore) {
+  /* Delete semaphore */
+  P_SCB p_SCB = semaphore;
+  P_TCB p_TCB;
+
+  while (p_SCB->p_lnk != NULL) {
+    /* A task is waiting for token */
+    p_TCB = rt_get_first ((P_XCB)p_SCB);
+    rt_ret_val(p_TCB, 0U);
+    rt_rmv_dly(p_TCB);
+    p_TCB->state = READY;
+    rt_put_prio (&os_rdy, p_TCB);
+  }
+
+  if ((os_rdy.p_lnk != NULL) && (os_rdy.p_lnk->prio > os_tsk.run->prio)) {
+    /* preempt running task */
+    rt_put_prio (&os_rdy, os_tsk.run);
+    os_tsk.run->state = READY;
+    rt_dispatch (NULL);
+  }
+
+  p_SCB->cb_type = 0U;
+
+  return (OS_R_OK);
+}
+#endif
+
+
+/*--------------------------- rt_sem_send -----------------------------------*/
+
+OS_RESULT rt_sem_send (OS_ID semaphore) {
+  /* Return a token to semaphore */
+  P_SCB p_SCB = semaphore;
+  P_TCB p_TCB;
+
+  if (p_SCB->p_lnk != NULL) {
+    /* A task is waiting for token */
+    p_TCB = rt_get_first ((P_XCB)p_SCB);
+#ifdef __CMSIS_RTOS
+    rt_ret_val(p_TCB, 1U);
+#else
+    rt_ret_val(p_TCB, OS_R_SEM);
+#endif
+    rt_rmv_dly (p_TCB);
+    rt_dispatch (p_TCB);
+  }
+  else {
+    /* Store token. */
+    p_SCB->tokens++;
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_sem_wait -----------------------------------*/
+
+OS_RESULT rt_sem_wait (OS_ID semaphore, U16 timeout) {
+  /* Obtain a token; possibly wait for it */
+  P_SCB p_SCB = semaphore;
+
+  if (p_SCB->tokens) {
+    p_SCB->tokens--;
+    return (OS_R_OK);
+  }
+  /* No token available: wait for one */
+  if (timeout == 0U) {
+    return (OS_R_TMO);
+  }
+  if (p_SCB->p_lnk != NULL) {
+    rt_put_prio ((P_XCB)p_SCB, os_tsk.run);
+  }
+  else {
+    p_SCB->p_lnk = os_tsk.run;
+    os_tsk.run->p_lnk = NULL;
+    os_tsk.run->p_rlnk = (P_TCB)p_SCB;
+  }
+  rt_block(timeout, WAIT_SEM);
+  return (OS_R_TMO);
+}
+
+
+/*--------------------------- isr_sem_send ----------------------------------*/
+
+void isr_sem_send (OS_ID semaphore) {
+  /* Same function as "os_sem_send", but to be called by ISRs */
+  P_SCB p_SCB = semaphore;
+
+  rt_psq_enq (p_SCB, 0U);
+  rt_psh_req ();
+}
+
+
+/*--------------------------- rt_sem_psh ------------------------------------*/
+
+void rt_sem_psh (P_SCB p_CB) {
+  /* Check if task has to be waken up */
+  P_TCB p_TCB;
+
+  if (p_CB->p_lnk != NULL) {
+    /* A task is waiting for token */
+    p_TCB = rt_get_first ((P_XCB)p_CB);
+    rt_rmv_dly (p_TCB);
+    p_TCB->state   = READY;
+#ifdef __CMSIS_RTOS
+    rt_ret_val(p_TCB, 1U);
+#else
+    rt_ret_val(p_TCB, OS_R_SEM);
+#endif
+    rt_put_prio (&os_rdy, p_TCB);
+  }
+  else {
+    /* Store token */
+    p_CB->tokens++;
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Semaphore.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Semaphore.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,51 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_SEMAPHORE.H
+ *      Purpose: Implements binary and counting semaphores
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Functions */
+extern void      rt_sem_init  (OS_ID semaphore, U16 token_count);
+extern OS_RESULT rt_sem_delete(OS_ID semaphore);
+extern OS_RESULT rt_sem_send  (OS_ID semaphore);
+extern OS_RESULT rt_sem_wait  (OS_ID semaphore, U16 timeout);
+extern void      isr_sem_send (OS_ID semaphore);
+extern void      rt_sem_psh (P_SCB p_CB);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_System.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_System.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,337 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_SYSTEM.C
+ *      Purpose: System Task Manager
+ *      Rev.:    V4.80
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_Task.h"
+#include "rt_System.h"
+#include "rt_Event.h"
+#include "rt_List.h"
+#include "rt_Mailbox.h"
+#include "rt_Semaphore.h"
+#include "rt_Time.h"
+#include "rt_Timer.h"
+#include "rt_Robin.h"
+#include "rt_HAL_CM.h"
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+S32 os_tick_irqn;
+
+/*----------------------------------------------------------------------------
+ *      Local Variables
+ *---------------------------------------------------------------------------*/
+
+static volatile BIT os_lock;
+static volatile BIT os_psh_flag;
+static          U8  pend_flags;
+
+/*----------------------------------------------------------------------------
+ *      Global Functions
+ *---------------------------------------------------------------------------*/
+
+#define RL_RTX_VER      0x480
+
+#if defined (__CC_ARM)
+__asm void $$RTX$$version (void) {
+   /* Export a version number symbol for a version control. */
+
+                EXPORT  __RL_RTX_VER
+
+__RL_RTX_VER    EQU     RL_RTX_VER
+}
+#endif
+
+
+/*--------------------------- rt_suspend ------------------------------------*/
+
+extern U32 sysUserTimerWakeupTime(void);
+
+U32 rt_suspend (void) {
+  /* Suspend OS scheduler */
+  U32 delta = 0xFFFFU;
+#ifdef __CMSIS_RTOS
+  U32 sleep;
+#endif
+
+  rt_tsk_lock();
+  
+  if (os_dly.p_dlnk) {
+    delta = os_dly.delta_time;
+  }
+#ifdef __CMSIS_RTOS
+  sleep = sysUserTimerWakeupTime();
+  if (sleep < delta) { delta = sleep; }
+#else
+  if (os_tmr.next) {
+    if (os_tmr.tcnt < delta) delta = os_tmr.tcnt;
+  }
+#endif
+
+  return (delta);
+}
+
+
+/*--------------------------- rt_resume -------------------------------------*/
+
+extern void sysUserTimerUpdate (U32 sleep_time);
+
+void rt_resume (U32 sleep_time) {
+  /* Resume OS scheduler after suspend */
+  P_TCB next;
+  U32   delta;
+
+  os_tsk.run->state = READY;
+  rt_put_rdy_first (os_tsk.run);
+
+  os_robin.task = NULL;
+
+  /* Update delays. */
+  if (os_dly.p_dlnk) {
+    delta = sleep_time;
+    if (delta >= os_dly.delta_time) {
+      delta   -= os_dly.delta_time;
+      os_time += os_dly.delta_time;
+      os_dly.delta_time = 1U;
+      while (os_dly.p_dlnk) {
+        rt_dec_dly();
+        if (delta == 0U) { break; }
+        delta--;
+        os_time++;
+      }
+    } else {
+      os_time           +=      delta;
+      os_dly.delta_time -= (U16)delta;
+    }
+  } else {
+    os_time += sleep_time;
+  }
+
+  /* Check the user timers. */
+#ifdef __CMSIS_RTOS
+  sysUserTimerUpdate(sleep_time);
+#else
+  if (os_tmr.next) {
+    delta = sleep_time;
+    if (delta >= os_tmr.tcnt) {
+      delta   -= os_tmr.tcnt;
+      os_tmr.tcnt = 1U;
+      while (os_tmr.next) {
+        rt_tmr_tick();
+        if (delta == 0U) { break; }
+        delta--;
+      }
+    } else {
+      os_tmr.tcnt -= delta;
+    }
+  }
+#endif
+
+  /* Switch back to highest ready task */
+  next = rt_get_first (&os_rdy);
+  rt_switch_req (next);
+
+  rt_tsk_unlock();
+}
+
+
+/*--------------------------- rt_tsk_lock -----------------------------------*/
+
+void rt_tsk_lock (void) {
+  /* Prevent task switching by locking out scheduler */
+  if (os_tick_irqn < 0) {
+    OS_LOCK();
+    os_lock = __TRUE;
+    OS_UNPEND(pend_flags);
+  } else {
+    OS_X_LOCK((U32)os_tick_irqn);
+    os_lock = __TRUE;
+    OS_X_UNPEND(pend_flags);
+  }
+}
+
+
+/*--------------------------- rt_tsk_unlock ---------------------------------*/
+
+void rt_tsk_unlock (void) {
+  /* Unlock scheduler and re-enable task switching */
+  if (os_tick_irqn < 0) {
+    OS_UNLOCK();
+    os_lock = __FALSE;
+    OS_PEND(pend_flags, os_psh_flag);
+    os_psh_flag = __FALSE;
+  } else {
+    OS_X_UNLOCK((U32)os_tick_irqn);
+    os_lock = __FALSE;
+    OS_X_PEND(pend_flags, os_psh_flag);
+    os_psh_flag = __FALSE;
+  }
+}
+
+
+/*--------------------------- rt_psh_req ------------------------------------*/
+
+void rt_psh_req (void) {
+  /* Initiate a post service handling request if required. */
+  if (os_lock == __FALSE) {
+    OS_PEND_IRQ();
+  }
+  else {
+    os_psh_flag = __TRUE;
+  }
+}
+
+
+/*--------------------------- rt_pop_req ------------------------------------*/
+
+void rt_pop_req (void) {
+  /* Process an ISR post service requests. */
+  struct OS_XCB *p_CB;
+  P_TCB next;
+  U32  idx;
+
+  os_tsk.run->state = READY;
+  rt_put_rdy_first (os_tsk.run);
+
+  idx = os_psq->last;
+  while (os_psq->count) {
+    p_CB = os_psq->q[idx].id;
+    if (p_CB->cb_type == TCB) {
+      /* Is of TCB type */
+      rt_evt_psh ((P_TCB)p_CB, (U16)os_psq->q[idx].arg);
+    }
+    else if (p_CB->cb_type == MCB) {
+      /* Is of MCB type */
+      rt_mbx_psh ((P_MCB)p_CB, (void *)os_psq->q[idx].arg);
+    }
+    else {
+      /* Must be of SCB type */
+      rt_sem_psh ((P_SCB)p_CB);
+    }
+    if (++idx == os_psq->size) { idx = 0U; }
+    rt_dec (&os_psq->count);
+  }
+  os_psq->last = (U8)idx;
+
+  next = rt_get_first (&os_rdy);
+  rt_switch_req (next);
+}
+
+
+/*--------------------------- os_tick_init ----------------------------------*/
+
+__weak S32 os_tick_init (void) {
+  /* Initialize SysTick timer as system tick timer. */
+  rt_systick_init();
+  return (-1);  /* Return IRQ number of SysTick timer */
+}
+
+/*--------------------------- os_tick_val -----------------------------------*/
+
+__weak U32 os_tick_val (void) {
+  /* Get SysTick timer current value (0 .. OS_TRV). */
+  return rt_systick_val();
+}
+
+/*--------------------------- os_tick_ovf -----------------------------------*/
+
+__weak U32 os_tick_ovf (void) {
+  /* Get SysTick timer overflow flag */
+  return rt_systick_ovf();
+}
+
+/*--------------------------- os_tick_irqack --------------------------------*/
+
+__weak void os_tick_irqack (void) {
+  /* Acknowledge timer interrupt. */
+}
+
+
+/*--------------------------- rt_systick ------------------------------------*/
+
+extern void sysTimerTick(void);
+
+void rt_systick (void) {
+  /* Check for system clock update, suspend running task. */
+  P_TCB next;
+
+  os_tsk.run->state = READY;
+  rt_put_rdy_first (os_tsk.run);
+
+  /* Check Round Robin timeout. */
+  rt_chk_robin ();
+
+  /* Update delays. */
+  os_time++;
+  rt_dec_dly ();
+
+  /* Check the user timers. */
+#ifdef __CMSIS_RTOS
+  sysTimerTick();
+#else
+  rt_tmr_tick ();
+#endif
+
+  /* Switch back to highest ready task */
+  next = rt_get_first (&os_rdy);
+  rt_switch_req (next);
+}
+
+/*--------------------------- rt_stk_check ----------------------------------*/
+
+__weak void rt_stk_check (void) {
+#ifdef __MBED_CMSIS_RTOS_CM
+    /* Check for stack overflow. */
+    if (os_tsk.run->task_id == MAIN_THREAD_ID) {
+        // TODO: For the main thread the check should be done against the main heap pointer
+    } else {
+        if ((os_tsk.run->tsk_stack < (U32)os_tsk.run->stack) ||
+            (os_tsk.run->stack[0] != MAGIC_WORD)) {
+            os_error (OS_ERR_STK_OVF);
+        }
+    }
+#else
+    if ((os_tsk.run->tsk_stack < (U32)os_tsk.run->stack) ||
+        (os_tsk.run->stack[0] != MAGIC_WORD)) {
+        os_error (OS_ERR_STK_OVF);
+    }
+#endif
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_System.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_System.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,57 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_SYSTEM.H
+ *      Purpose: System Task Manager definitions
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Variables */
+#define os_psq  ((P_PSQ)&os_fifo)
+extern S32 os_tick_irqn;
+
+/* Functions */
+extern U32  rt_suspend    (void);
+extern void rt_resume     (U32 sleep_time);
+extern void rt_tsk_lock   (void);
+extern void rt_tsk_unlock (void);
+extern void rt_psh_req    (void);
+extern void rt_pop_req    (void);
+extern void rt_systick    (void);
+extern void rt_stk_check  (void);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Task.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Task.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,456 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TASK.C
+ *      Purpose: Task functions and system start up.
+ *      Rev.:    V4.80
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_System.h"
+#include "rt_Task.h"
+#include "rt_List.h"
+#include "rt_MemBox.h"
+#include "rt_Robin.h"
+#include "rt_HAL_CM.h"
+#include "rt_OsEventObserver.h"
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+/* Running and next task info. */
+struct OS_TSK os_tsk;
+
+/* Task Control Blocks of idle demon */
+struct OS_TCB os_idle_TCB;
+
+
+/*----------------------------------------------------------------------------
+ *      Local Functions
+ *---------------------------------------------------------------------------*/
+
+static OS_TID rt_get_TID (void) {
+  U32 tid;
+
+  for (tid = 1U; tid <= os_maxtaskrun; tid++) {
+    if (os_active_TCB[tid-1U] == NULL) {
+      return ((OS_TID)tid);
+    }
+  }
+  return (0U);
+}
+
+
+/*--------------------------- rt_init_context -------------------------------*/
+
+static void rt_init_context (P_TCB p_TCB, U8 priority, FUNCP task_body) {
+  /* Initialize general part of the Task Control Block. */
+  p_TCB->cb_type   = TCB;
+  p_TCB->state     = READY;
+  p_TCB->prio      = priority;
+  p_TCB->prio_base = priority;
+  p_TCB->p_lnk     = NULL;
+  p_TCB->p_rlnk    = NULL;
+  p_TCB->p_dlnk    = NULL;
+  p_TCB->p_blnk    = NULL;
+  p_TCB->p_mlnk    = NULL;
+  p_TCB->delta_time    = 0U;
+  p_TCB->interval_time = 0U;
+  p_TCB->events  = 0U;
+  p_TCB->waits   = 0U;
+  p_TCB->stack_frame = 0U;
+
+  if (p_TCB->priv_stack == 0U) {
+    /* Allocate the memory space for the stack. */
+    p_TCB->stack = rt_alloc_box (mp_stk);
+  }
+  rt_init_stack (p_TCB, task_body);
+}
+
+
+/*--------------------------- rt_switch_req ---------------------------------*/
+
+void rt_switch_req (P_TCB p_new) {
+  /* Switch to next task (identified by "p_new"). */
+  os_tsk.new_tsk   = p_new;
+  p_new->state = RUNNING;
+  if (osEventObs && osEventObs->thread_switch) {
+    osEventObs->thread_switch(p_new->context);
+  }
+  DBG_TASK_SWITCH(p_new->task_id);
+}
+
+
+/*--------------------------- rt_dispatch -----------------------------------*/
+
+void rt_dispatch (P_TCB next_TCB) {
+  /* Dispatch next task if any identified or dispatch highest ready task    */
+  /* "next_TCB" identifies a task to run or has value NULL (=no next task)  */
+  if (next_TCB == NULL) {
+    /* Running task was blocked: continue with highest ready task */
+    next_TCB = rt_get_first (&os_rdy);
+    rt_switch_req (next_TCB);
+  }
+  else {
+    /* Check which task continues */
+    if (next_TCB->prio > os_tsk.run->prio) {
+      /* preempt running task */
+      rt_put_rdy_first (os_tsk.run);
+      os_tsk.run->state = READY;
+      rt_switch_req (next_TCB);
+    }
+    else {
+      /* put next task into ready list, no task switch takes place */
+      next_TCB->state = READY;
+      rt_put_prio (&os_rdy, next_TCB);
+    }
+  }
+}
+
+
+/*--------------------------- rt_block --------------------------------------*/
+
+void rt_block (U16 timeout, U8 block_state) {
+  /* Block running task and choose next ready task.                         */
+  /* "timeout" sets a time-out value or is 0xffff (=no time-out).           */
+  /* "block_state" defines the appropriate task state */
+  P_TCB next_TCB;
+
+  if (timeout) {
+    if (timeout < 0xFFFFU) {
+      rt_put_dly (os_tsk.run, timeout);
+    }
+    os_tsk.run->state = block_state;
+    next_TCB = rt_get_first (&os_rdy);
+    rt_switch_req (next_TCB);
+  }
+}
+
+
+/*--------------------------- rt_tsk_pass -----------------------------------*/
+
+void rt_tsk_pass (void) {
+  /* Allow tasks of same priority level to run cooperatively.*/
+  P_TCB p_new;
+
+  p_new = rt_get_same_rdy_prio();
+  if (p_new != NULL) {
+    rt_put_prio ((P_XCB)&os_rdy, os_tsk.run);
+    os_tsk.run->state = READY;
+    rt_switch_req (p_new);
+  }
+}
+
+
+/*--------------------------- rt_tsk_self -----------------------------------*/
+
+OS_TID rt_tsk_self (void) {
+  /* Return own task identifier value. */
+  if (os_tsk.run == NULL) {
+    return (0U);
+  }
+  return ((OS_TID)os_tsk.run->task_id);
+}
+
+
+/*--------------------------- rt_tsk_prio -----------------------------------*/
+
+OS_RESULT rt_tsk_prio (OS_TID task_id, U8 new_prio) {
+  /* Change execution priority of a task to "new_prio". */
+  P_TCB p_task;
+
+  if (task_id == 0U) {
+    /* Change execution priority of calling task. */
+    os_tsk.run->prio      = new_prio;
+    os_tsk.run->prio_base = new_prio;
+run:if (rt_rdy_prio() > new_prio) {
+      rt_put_prio (&os_rdy, os_tsk.run);
+      os_tsk.run->state   = READY;
+      rt_dispatch (NULL);
+    }
+    return (OS_R_OK);
+  }
+
+  /* Find the task in the "os_active_TCB" array. */
+  if ((task_id > os_maxtaskrun) || (os_active_TCB[task_id-1U] == NULL)) {
+    /* Task with "task_id" not found or not started. */
+    return (OS_R_NOK);
+  }
+  p_task = os_active_TCB[task_id-1U];
+  p_task->prio      = new_prio;
+  p_task->prio_base = new_prio;
+  if (p_task == os_tsk.run) {
+    goto run;
+  }
+  rt_resort_prio (p_task);
+  if (p_task->state == READY) {
+    /* Task enqueued in a ready list. */
+    p_task = rt_get_first (&os_rdy);
+    rt_dispatch (p_task);
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_tsk_create ---------------------------------*/
+
+OS_TID rt_tsk_create (FUNCP task, U32 prio_stksz, void *stk, void *argv) {
+  /* Start a new task declared with "task". */
+  P_TCB task_context;
+  U32 i;
+
+  /* Priority 0 is reserved for idle task! */
+  if ((prio_stksz & 0xFFU) == 0U) {
+    prio_stksz += 1U;
+  }
+  task_context = rt_alloc_box (mp_tcb);
+  if (task_context == NULL) {
+    return (0U);
+  }
+  /* If "size != 0" use a private user provided stack. */
+  task_context->stack      = stk;
+  task_context->priv_stack = prio_stksz >> 8;
+
+  /* Find a free entry in 'os_active_TCB' table. */
+  i = rt_get_TID ();
+  if (i == 0U) {
+    return (0U);
+  }
+  task_context->task_id = (U8)i;
+  /* Pass parameter 'argv' to 'rt_init_context' */
+  task_context->msg = argv;
+  task_context->argv = argv;
+  /* For 'size == 0' system allocates the user stack from the memory pool. */
+  rt_init_context (task_context, (U8)(prio_stksz & 0xFFU), task);
+
+  os_active_TCB[i-1U] = task_context;
+  DBG_TASK_NOTIFY(task_context, __TRUE);
+  rt_dispatch (task_context);
+  return ((OS_TID)i);
+}
+
+
+/*--------------------------- rt_tsk_delete ---------------------------------*/
+
+OS_RESULT rt_tsk_delete (OS_TID task_id) {
+  /* Terminate the task identified with "task_id". */
+  P_TCB  task_context;
+  P_TCB  p_TCB;
+  P_MUCB p_MCB, p_MCB0;
+
+  if ((task_id == 0U) || (task_id == os_tsk.run->task_id)) {
+    /* Terminate itself. */
+    os_tsk.run->state     = INACTIVE;
+    os_tsk.run->tsk_stack = rt_get_PSP ();
+    rt_stk_check ();
+    p_MCB = os_tsk.run->p_mlnk;
+    while (p_MCB) {
+      /* Release mutexes owned by this task */
+      if (p_MCB->p_lnk) {
+        /* A task is waiting for mutex. */
+        p_TCB = rt_get_first ((P_XCB)p_MCB);
+#ifdef __CMSIS_RTOS
+        rt_ret_val (p_TCB, 0U/*osOK*/);
+#else
+        rt_ret_val (p_TCB, OS_R_MUT); 
+#endif
+        rt_rmv_dly (p_TCB);
+        p_TCB->state = READY;
+        rt_put_prio (&os_rdy, p_TCB);
+        /* A waiting task becomes the owner of this mutex. */
+        p_MCB0 = p_MCB->p_mlnk;
+        p_MCB->level  = 1U;
+        p_MCB->owner  = p_TCB;
+        p_MCB->p_mlnk = p_TCB->p_mlnk;
+        p_TCB->p_mlnk = p_MCB; 
+        p_MCB = p_MCB0;
+      }
+      else {
+        p_MCB0 = p_MCB->p_mlnk;
+        p_MCB->level  = 0U;
+        p_MCB->owner  = NULL;
+        p_MCB->p_mlnk = NULL;
+        p_MCB = p_MCB0;
+      }
+    }
+    os_active_TCB[os_tsk.run->task_id-1U] = NULL;
+    rt_free_box (mp_stk, os_tsk.run->stack);
+    os_tsk.run->stack = NULL;
+    DBG_TASK_NOTIFY(os_tsk.run, __FALSE);
+    rt_free_box (mp_tcb, os_tsk.run);
+    os_tsk.run = NULL;
+    rt_dispatch (NULL);
+    /* The program should never come to this point. */
+  }
+  else {
+    /* Find the task in the "os_active_TCB" array. */
+    if ((task_id > os_maxtaskrun) || (os_active_TCB[task_id-1U] == NULL)) {
+      /* Task with "task_id" not found or not started. */
+      return (OS_R_NOK);
+    }
+    task_context = os_active_TCB[task_id-1U];
+    rt_rmv_list (task_context);
+    rt_rmv_dly (task_context);
+    p_MCB = task_context->p_mlnk;
+    while (p_MCB) {
+      /* Release mutexes owned by this task */
+      if (p_MCB->p_lnk) {
+        /* A task is waiting for mutex. */
+        p_TCB = rt_get_first ((P_XCB)p_MCB);
+#ifdef __CMSIS_RTOS
+        rt_ret_val (p_TCB, 0U/*osOK*/);
+#else
+        rt_ret_val (p_TCB, OS_R_MUT); 
+#endif
+        rt_rmv_dly (p_TCB);
+        p_TCB->state = READY;
+        rt_put_prio (&os_rdy, p_TCB);
+        /* A waiting task becomes the owner of this mutex. */
+        p_MCB0 = p_MCB->p_mlnk;
+        p_MCB->level  = 1U;
+        p_MCB->owner  = p_TCB;
+        p_MCB->p_mlnk = p_TCB->p_mlnk;
+        p_TCB->p_mlnk = p_MCB; 
+        p_MCB = p_MCB0;
+      }
+      else {
+        p_MCB0 = p_MCB->p_mlnk;
+        p_MCB->level  = 0U;
+        p_MCB->owner  = NULL;
+        p_MCB->p_mlnk = NULL;
+        p_MCB = p_MCB0;
+      }
+    }
+    os_active_TCB[task_id-1U] = NULL;
+    rt_free_box (mp_stk, task_context->stack);
+    task_context->stack = NULL;
+    DBG_TASK_NOTIFY(task_context, __FALSE);
+    rt_free_box (mp_tcb, task_context);
+    if (rt_rdy_prio() > os_tsk.run->prio) {
+      /* Ready task has higher priority than running task. */
+      os_tsk.run->state = READY;
+      rt_put_prio (&os_rdy, os_tsk.run);
+      rt_dispatch (NULL);
+    }
+  }
+  return (OS_R_OK);
+}
+
+
+/*--------------------------- rt_sys_init -----------------------------------*/
+
+#ifdef __CMSIS_RTOS
+void rt_sys_init (void) {
+#else
+void rt_sys_init (FUNCP first_task, U32 prio_stksz, void *stk) {
+#endif
+  /* Initialize system and start up task declared with "first_task". */
+  U32 i;
+
+  DBG_INIT();
+
+  /* Initialize dynamic memory and task TCB pointers to NULL. */
+  for (i = 0U; i < os_maxtaskrun; i++) {
+    os_active_TCB[i] = NULL;
+  }
+  rt_init_box (mp_tcb, (U32)mp_tcb_size, sizeof(struct OS_TCB));
+  rt_init_box (mp_stk, mp_stk_size, BOX_ALIGN_8 | (U16)(os_stackinfo));
+  rt_init_box ((U32 *)m_tmr, (U32)mp_tmr_size, sizeof(struct OS_TMR));
+
+  /* Set up TCB of idle demon */
+  os_idle_TCB.task_id    = 255U;
+  os_idle_TCB.priv_stack = 0U;
+  rt_init_context (&os_idle_TCB, 0U, os_idle_demon);
+
+  /* Set up ready list: initially empty */
+  os_rdy.cb_type = HCB;
+  os_rdy.p_lnk   = NULL;
+  /* Set up delay list: initially empty */
+  os_dly.cb_type = HCB;
+  os_dly.p_dlnk  = NULL;
+  os_dly.p_blnk  = NULL;
+  os_dly.delta_time = 0U;
+
+  /* Fix SP and system variables to assume idle task is running */
+  /* Transform main program into idle task by assuming idle TCB */
+#ifndef __CMSIS_RTOS
+  rt_set_PSP (os_idle_TCB.tsk_stack+32U);
+#endif
+  os_tsk.run = &os_idle_TCB;
+  os_tsk.run->state = RUNNING;
+
+  /* Set the current thread to idle, so that on exit from this SVCall we do not
+   * de-reference a NULL TCB. */
+  rt_switch_req(&os_idle_TCB);
+
+  /* Initialize ps queue */
+  os_psq->first = 0U;
+  os_psq->last  = 0U;
+  os_psq->size  = os_fifo_size;
+
+  rt_init_robin ();
+
+#ifndef __CMSIS_RTOS
+  /* Initialize SVC and PendSV */
+  rt_svc_init ();
+
+  /* Initialize and start system clock timer */
+  os_tick_irqn = os_tick_init ();
+  if (os_tick_irqn >= 0) {
+    OS_X_INIT((U32)os_tick_irqn);
+  }
+
+  /* Start up first user task before entering the endless loop */
+  rt_tsk_create (first_task, prio_stksz, stk, NULL);
+#endif
+}
+
+
+/*--------------------------- rt_sys_start ----------------------------------*/
+
+#ifdef __CMSIS_RTOS
+void rt_sys_start (void) {
+  /* Start system */
+
+  /* Initialize SVC and PendSV */
+  rt_svc_init ();
+
+  /* Initialize and start system clock timer */
+  os_tick_irqn = os_tick_init ();
+  if (os_tick_irqn >= 0) {
+    OS_X_INIT((U32)os_tick_irqn);
+  }
+}
+#endif
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Task.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Task.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,88 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TASK.H
+ *      Purpose: Task functions and system start up.
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Definitions */
+
+#include "cmsis_os.h"
+
+/* Values for 'state'   */
+#define INACTIVE        0U
+#define READY           1U
+#define RUNNING         2U
+#define WAIT_DLY        3U
+#define WAIT_ITV        4U
+#define WAIT_OR         5U
+#define WAIT_AND        6U
+#define WAIT_SEM        7U
+#define WAIT_MBX        8U
+#define WAIT_MUT        9U
+
+/* Return codes */
+#define OS_R_TMO        0x01U
+#define OS_R_EVT        0x02U
+#define OS_R_SEM        0x03U
+#define OS_R_MBX        0x04U
+#define OS_R_MUT        0x05U
+
+#define OS_R_OK         0x00U
+#define OS_R_NOK        0xFFU
+
+/* Variables */
+extern struct OS_TSK os_tsk;
+extern struct OS_TCB os_idle_TCB;
+
+/* Functions */
+extern void      rt_switch_req (P_TCB p_new);
+extern void      rt_dispatch   (P_TCB next_TCB);
+extern void      rt_block      (U16 timeout, U8 block_state);
+extern void      rt_tsk_pass   (void);
+extern OS_TID    rt_tsk_self   (void);
+extern OS_RESULT rt_tsk_prio   (OS_TID task_id, U8 new_prio);
+extern OS_TID    rt_tsk_create (FUNCP task, U32 prio_stksz, void *stk, void *argv);
+extern OS_RESULT rt_tsk_delete (OS_TID task_id);
+#ifdef __CMSIS_RTOS
+extern void      rt_sys_init   (void);
+extern void      rt_sys_start  (void);
+#else
+extern void      rt_sys_init   (FUNCP first_task, U32 prio_stksz, void *stk);
+#endif
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Time.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Time.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,93 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TIME.C
+ *      Purpose: Delay and interval wait functions
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_Task.h"
+#include "rt_Time.h"
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+/* Free running system tick counter */
+U32 os_time;
+
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+
+/*--------------------------- rt_time_get -----------------------------------*/
+
+U32 rt_time_get (void) {
+  /* Get system time tick */
+  return (os_time);
+}
+
+
+/*--------------------------- rt_dly_wait -----------------------------------*/
+
+void rt_dly_wait (U16 delay_time) {
+  /* Delay task by "delay_time" */
+  rt_block (delay_time, WAIT_DLY);
+}
+
+
+/*--------------------------- rt_itv_set ------------------------------------*/
+
+void rt_itv_set (U16 interval_time) {
+  /* Set interval length and define start of first interval */
+  os_tsk.run->interval_time = interval_time;
+  os_tsk.run->delta_time = interval_time + (U16)os_time;
+}
+
+
+/*--------------------------- rt_itv_wait -----------------------------------*/
+
+void rt_itv_wait (void) {
+  /* Wait for interval end and define start of next one */
+  U16 delta;
+
+  delta = os_tsk.run->delta_time - (U16)os_time;
+  os_tsk.run->delta_time += os_tsk.run->interval_time;
+  if ((delta & 0x8000U) == 0U) {
+    rt_block (delta, WAIT_ITV);
+  }
+}
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Time.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Time.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,52 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TIME.H
+ *      Purpose: Delay and interval wait functions definitions
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Variables */
+extern U32 os_time;
+
+/* Functions */
+extern U32  rt_time_get (void);
+extern void rt_dly_wait (U16 delay_time);
+extern void rt_itv_set  (U16 interval_time);
+extern void rt_itv_wait (void);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Timer.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Timer.c	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,135 @@
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TIMER.C
+ *      Purpose: User timer functions
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used 
+ *    to endorse or promote products derived from this software without 
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+#include "rt_TypeDef.h"
+#include "RTX_Config.h"
+#include "rt_Timer.h"
+#include "rt_MemBox.h"
+#include "cmsis_os.h"
+
+#ifndef __CMSIS_RTOS
+
+
+/*----------------------------------------------------------------------------
+ *      Global Variables
+ *---------------------------------------------------------------------------*/
+
+/* User Timer list pointer */
+struct OS_XTMR os_tmr;
+
+/*----------------------------------------------------------------------------
+ *      Functions
+ *---------------------------------------------------------------------------*/
+
+/*--------------------------- rt_tmr_tick -----------------------------------*/
+
+void rt_tmr_tick (void) {
+  /* Decrement delta count of timer list head. Timers having the value of   */
+  /* zero are removed from the list and the callback function is called.    */
+  P_TMR p;
+
+  if (os_tmr.next == NULL) {
+    return;
+  }
+  os_tmr.tcnt--;
+  while ((os_tmr.tcnt == 0U) && ((p = os_tmr.next) != NULL)) {
+    /* Call a user provided function to handle an elapsed timer */
+    os_tmr_call (p->info);
+    os_tmr.tcnt = p->tcnt;
+    os_tmr.next = p->next;
+    rt_free_box ((U32 *)m_tmr, p);
+  }
+}
+
+/*--------------------------- rt_tmr_create ---------------------------------*/
+
+OS_ID rt_tmr_create (U16 tcnt, U16 info)  {
+  /* Create an user timer and put it into the chained timer list using      */
+  /* a timeout count value of "tcnt". User parameter "info" is used as a    */
+  /* parameter for the user provided callback function "os_tmr_call ()".    */
+  P_TMR p_tmr, p;
+  U32 delta,itcnt = tcnt;
+
+  if ((tcnt == 0U) || (m_tmr == NULL)) {
+    return (NULL);
+  }
+  p_tmr = rt_alloc_box ((U32 *)m_tmr);
+  if (!p_tmr)  {
+    return (NULL);
+  }
+  p_tmr->info = info;
+  p = (P_TMR)&os_tmr;
+  delta = p->tcnt;
+  while ((delta < itcnt) && (p->next != NULL)) {
+    p = p->next;
+    delta += p->tcnt;
+  }
+  /* Right place found, insert timer into the list */
+  p_tmr->next = p->next;
+  p_tmr->tcnt = (U16)(delta - itcnt);
+  p->next = p_tmr;
+  p->tcnt -= p_tmr->tcnt;
+  return (p_tmr);
+}
+
+/*--------------------------- rt_tmr_kill -----------------------------------*/
+
+OS_ID rt_tmr_kill (OS_ID timer)  {
+  /* Remove user timer from the chained timer list. */
+  P_TMR p, p_tmr;
+
+  p_tmr = (P_TMR)timer;
+  p = (P_TMR)&os_tmr;
+  /* Search timer list for requested timer */
+  while (p->next != p_tmr)  {
+    if (p->next == NULL) {
+      /* Failed, "timer" is not in the timer list */
+      return (p_tmr);
+    }
+    p = p->next;
+  }
+  /* Timer was found, remove it from the list */
+  p->next = p_tmr->next;
+  p->tcnt += p_tmr->tcnt;
+  rt_free_box ((U32 *)m_tmr, p_tmr);
+  /* Timer killed */
+  return (NULL);
+}
+
+
+#endif
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_Timer.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_Timer.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,50 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TIMER.H
+ *      Purpose: User timer functions
+ *      Rev.:    V4.70
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2013 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used 
+ *    to endorse or promote products derived from this software without 
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+
+/* Variables */
+extern struct OS_XTMR os_tmr;
+
+/* Functions */
+extern void  rt_tmr_tick   (void);
+extern OS_ID rt_tmr_create (U16 tcnt, U16 info);
+extern OS_ID rt_tmr_kill   (OS_ID timer);
+
+/*----------------------------------------------------------------------------
+ * end of file
+ *---------------------------------------------------------------------------*/
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a rtx/TARGET_CORTEX_M/rt_TypeDef.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rtx/TARGET_CORTEX_M/rt_TypeDef.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,175 @@
+
+/** \addtogroup rtos */
+/** @{*/
+/*----------------------------------------------------------------------------
+ *      CMSIS-RTOS  -  RTX
+ *----------------------------------------------------------------------------
+ *      Name:    RT_TYPEDEF.H
+ *      Purpose: Type Definitions
+ *      Rev.:    V4.79
+ *----------------------------------------------------------------------------
+ *
+ * Copyright (c) 1999-2009 KEIL, 2009-2015 ARM Germany GmbH
+ * All rights reserved.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of ARM  nor the names of its contributors may be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *---------------------------------------------------------------------------*/
+#ifndef RT_TYPE_DEF_H
+#define RT_TYPE_DEF_H
+
+/* Types */
+typedef char               S8;
+typedef unsigned char      U8;
+typedef short              S16;
+typedef unsigned short     U16;
+typedef int                S32;
+typedef unsigned int       U32;
+typedef long long          S64;
+typedef unsigned long long U64;
+typedef unsigned char      BIT;
+typedef unsigned int       BOOL;
+typedef void               (*FUNCP)(void);
+
+typedef U32     OS_TID;
+typedef void    *OS_ID;
+typedef U32     OS_RESULT;
+
+typedef struct OS_TCB {
+  /* General part: identical for all implementations.                        */
+  U8     cb_type;                 /* Control Block Type                      */
+  U8     state;                   /* Task state                              */
+  U8     prio;                    /* Execution priority                      */
+  U8     task_id;                 /* Task ID value for optimized TCB access  */
+  struct OS_TCB *p_lnk;           /* Link pointer for ready/sem. wait list   */
+  struct OS_TCB *p_rlnk;          /* Link pointer for sem./mbx lst backwards */
+  struct OS_TCB *p_dlnk;          /* Link pointer for delay list             */
+  struct OS_TCB *p_blnk;          /* Link pointer for delay list backwards   */
+  U16    delta_time;              /* Time until time out                     */
+  U16    interval_time;           /* Time interval for periodic waits        */
+  U16    events;                  /* Event flags                             */
+  U16    waits;                   /* Wait flags                              */
+  void   **msg;                   /* Direct message passing when task waits  */
+  struct OS_MUCB *p_mlnk;         /* Link pointer for mutex owner list       */
+  U8     prio_base;               /* Base priority                           */
+
+  /* Hardware dependant part: specific for CM processor                      */
+  U8     stack_frame;             /* Stack frame: 0=Basic, 1=Extended,       */
+  U16    reserved;                /* Two reserved bytes for alignment        */
+                                  /* (2=VFP/D16 stacked, 4=NEON/D32 stacked) */
+  U32    priv_stack;              /* Private stack size, 0= system assigned  */
+  U32    tsk_stack;               /* Current task Stack pointer (R13)        */
+  U32    *stack;                  /* Pointer to Task Stack memory block      */
+
+  /* Task entry point used for uVision debugger                              */
+  FUNCP  ptask;                   /* Task entry address                      */
+  void   *argv;                   /* Task argument                           */
+  void   *context;                /* Pointer to thread context               */
+} *P_TCB;
+#define TCB_STACKF      37        /* 'stack_frame' offset                    */
+#define TCB_TSTACK      44        /* 'tsk_stack' offset                      */
+
+typedef struct OS_PSFE {          /* Post Service Fifo Entry                 */
+  void  *id;                      /* Object Identification                   */
+  U32    arg;                     /* Object Argument                         */
+} *P_PSFE;
+
+typedef struct OS_PSQ {           /* Post Service Queue                      */
+  U8     first;                   /* FIFO Head Index                         */
+  U8     last;                    /* FIFO Tail Index                         */
+  U8     count;                   /* Number of stored items in FIFO          */
+  U8     size;                    /* FIFO Size                               */
+  struct OS_PSFE q[1];            /* FIFO Content                            */
+} *P_PSQ;
+
+typedef struct OS_TSK {
+  P_TCB  run;                     /* Current running task                    */
+  P_TCB  new_tsk;                /* Scheduled task to run                   */
+} *P_TSK;
+
+typedef struct OS_ROBIN {         /* Round Robin Control                     */
+  P_TCB  task;                    /* Round Robin task                        */
+  U16    time;                    /* Round Robin switch time                 */
+  U16    tout;                    /* Round Robin timeout                     */
+} *P_ROBIN;
+
+typedef struct OS_XCB {
+  U8     cb_type;                 /* Control Block Type                      */
+  struct OS_TCB *p_lnk;           /* Link pointer for ready/sem. wait list   */
+  struct OS_TCB *p_rlnk;          /* Link pointer for sem./mbx lst backwards */
+  struct OS_TCB *p_dlnk;          /* Link pointer for delay list             */
+  struct OS_TCB *p_blnk;          /* Link pointer for delay list backwards   */
+  U16    delta_time;              /* Time until time out                     */
+} *P_XCB;
+
+typedef struct OS_MCB {
+  U8     cb_type;                 /* Control Block Type                      */
+  U8     state;                   /* State flag variable                     */
+  U8     isr_st;                  /* State flag variable for isr functions   */
+  struct OS_TCB *p_lnk;           /* Chain of tasks waiting for message      */
+  U16    first;                   /* Index of the message list begin         */
+  U16    last;                    /* Index of the message list end           */
+  U16    count;                   /* Actual number of stored messages        */
+  U16    size;                    /* Maximum number of stored messages       */
+  void   *msg[1];                 /* FIFO for Message pointers 1st element   */
+} *P_MCB;
+
+typedef struct OS_SCB {
+  U8     cb_type;                 /* Control Block Type                      */
+  U8     mask;                    /* Semaphore token mask                    */
+  U16    tokens;                  /* Semaphore tokens                        */
+  struct OS_TCB *p_lnk;           /* Chain of tasks waiting for tokens       */
+} *P_SCB;
+
+typedef struct OS_MUCB {
+  U8     cb_type;                 /* Control Block Type                      */
+  U16    level;                   /* Call nesting level                      */
+  struct OS_TCB *p_lnk;           /* Chain of tasks waiting for mutex        */
+  struct OS_TCB *owner;           /* Mutex owner task                        */
+  struct OS_MUCB *p_mlnk;         /* Chain of mutexes by owner task          */
+} *P_MUCB;
+
+typedef struct OS_XTMR {
+  struct OS_TMR  *next;
+  U16    tcnt;
+} *P_XTMR;
+
+typedef struct OS_TMR {
+  struct OS_TMR  *next;           /* Link pointer to Next timer              */
+  U16    tcnt;                    /* Timer delay count                       */
+  U16    info;                    /* User defined call info                  */
+} *P_TMR;
+
+typedef struct OS_BM {
+  void *free;                     /* Pointer to first free memory block      */
+  void *end;                      /* Pointer to memory block end             */
+  U32  blk_size;                  /* Memory block size                       */
+} *P_BM;
+
+/* Definitions */
+#define __TRUE          1U
+#define __FALSE         0U
+#define NULL            ((void *) 0)
+
+#endif
+
+/** @}*/
diff -r 000000000000 -r a7c449cd2d5a targets/TARGET_ARM_SSG/mbed_rtx4.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_ARM_SSG/mbed_rtx4.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,40 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016-2017 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MBED_MBED_RTX_H
+#define MBED_MBED_RTX_H
+
+#if defined(TARGET_BEETLE) || defined(TARGET_CM3DS_MPS2)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20020000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              7
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          112
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                24000000
+#endif
+
+#endif
+
+#endif  // MBED_MBED_RTX_H
diff -r 000000000000 -r a7c449cd2d5a targets/TARGET_Freescale/mbed_rtx4.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Freescale/mbed_rtx4.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,318 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MBED_MBED_RTX_H
+#define MBED_MBED_RTX_H
+
+#if defined(TARGET_K20D50M)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x10008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                96000000
+#endif
+
+#elif defined(TARGET_TEENSY3_1)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                96000000
+#endif
+
+#elif defined(TARGET_MCU_K22F)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20010000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                80000000
+#endif
+
+#elif defined(TARGET_K66F)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20030000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                120000000
+#endif
+
+#elif defined(TARGET_KL27Z)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20003000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_KL43Z)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20006000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_KL05Z)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20000C00UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_KL25Z)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20003000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_KL26Z)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20003000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_KL46Z)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20006000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_KL82Z)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20012000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                72000000
+#endif
+
+#elif defined(TARGET_K64F)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20030000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#if defined(__CC_ARM) || defined(__GNUC__)
+#define ISR_STACK_SIZE          (0x1000)
+#endif
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                120000000
+#endif
+
+#elif defined(TARGET_KW24D)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_KW41Z)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20018000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                40000000
+#endif
+
+#elif defined(TARGET_K82F)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20030000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                120000000
+#endif
+
+#elif defined(TARGET_RO359B)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20030000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#if defined(__CC_ARM) || defined(__GNUC__)
+#define ISR_STACK_SIZE          (0x1000)
+#endif
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                96000000
+#endif
+
+#endif
+
+#endif  // MBED_MBED_RTX_H
diff -r 000000000000 -r a7c449cd2d5a targets/TARGET_Maxim/mbed_rtx4.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Maxim/mbed_rtx4.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,112 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MBED_MBED_RTX_H
+#define MBED_MBED_RTX_H
+
+#if defined(TARGET_MAX32600)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                24000000
+#endif
+
+#elif defined(TARGET_MAX32610)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                24000000
+#endif
+
+#elif defined(TARGET_MAX32620)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20040000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_MAX32625)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20028000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                96000000
+#endif
+
+#elif defined(TARGET_MAX32630)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20080000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                96000000
+#endif
+
+#endif
+
+#endif  // MBED_MBED_RTX_H
diff -r 000000000000 -r a7c449cd2d5a targets/TARGET_NORDIC/mbed_rtx4.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_NORDIC/mbed_rtx4.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,86 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MBED_MBED_RTX_H
+#define MBED_MBED_RTX_H
+
+#if defined(TARGET_MCU_NRF51822)
+
+#ifndef INITIAL_SP
+#   if defined(TARGET_MCU_NORDIC_32K)
+#       define INITIAL_SP            (0x20008000UL)
+#   elif defined(TARGET_MCU_NORDIC_16K)
+#       define INITIAL_SP            (0x20004000UL)
+#   endif
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              7
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          512
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                32768
+#endif
+#ifndef OS_SYSTICK
+#define OS_SYSTICK              0
+#endif
+
+#elif defined(TARGET_MCU_NRF52832)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20010000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              7
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          512
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                64000000
+#endif
+
+#elif defined(TARGET_MCU_NRF52840)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20040000UL)
+#endif
+
+// More than 256 bytes are needed for the idle thread stack on the NRF52840
+#define OS_IDLE_THREAD_STACK_SIZE  512
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              24
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          2048
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                64000000
+#endif
+
+#endif // defined(TARGET_MCU_NRF51822)...
+
+#endif // #ifndef MBED_MBED_RTX_H
diff -r 000000000000 -r a7c449cd2d5a targets/TARGET_NUVOTON/mbed_rtx4.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_NUVOTON/mbed_rtx4.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,100 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MBED_MBED_RTX_H
+#define MBED_MBED_RTX_H
+
+#include <stdint.h>
+
+#if defined(TARGET_NUMAKER_PFM_NUC472)
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                84000000
+#endif
+
+#if defined(__CC_ARM)
+    extern uint32_t               Image$$ARM_LIB_HEAP$$ZI$$Base[];
+    extern uint32_t               Image$$ARM_LIB_HEAP$$ZI$$Length[];
+    extern uint32_t               Image$$ARM_LIB_STACK$$ZI$$Base[];
+    extern uint32_t               Image$$ARM_LIB_STACK$$ZI$$Length[];
+    #define HEAP_START            ((unsigned char*) Image$$ARM_LIB_HEAP$$ZI$$Base)
+    #define HEAP_SIZE             ((uint32_t) Image$$ARM_LIB_HEAP$$ZI$$Length)
+    #define ISR_STACK_START       ((unsigned char*)Image$$ARM_LIB_STACK$$ZI$$Base)
+    #define ISR_STACK_SIZE        ((uint32_t)Image$$ARM_LIB_STACK$$ZI$$Length)
+#elif defined(__GNUC__)
+    extern uint32_t               __StackTop[];
+    extern uint32_t               __StackLimit[];
+    extern uint32_t               __end__[];
+    extern uint32_t               __HeapLimit[];
+    #define HEAP_START            ((unsigned char*)__end__)
+    #define HEAP_SIZE             ((uint32_t)((uint32_t)__HeapLimit - (uint32_t)HEAP_START))
+    #define ISR_STACK_START       ((unsigned char*)__StackLimit)
+    #define ISR_STACK_SIZE        ((uint32_t)((uint32_t)__StackTop - (uint32_t)__StackLimit))
+#elif defined(__ICCARM__)
+    /* No region declarations needed */
+#else
+    #error "no toolchain defined"
+#endif
+
+#elif defined(TARGET_NUMAKER_PFM_M453)
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                72000000
+#endif
+
+#if defined(__CC_ARM)
+    extern uint32_t               Image$$ARM_LIB_HEAP$$ZI$$Base[];
+    extern uint32_t               Image$$ARM_LIB_HEAP$$ZI$$Length[];
+    extern uint32_t               Image$$ARM_LIB_STACK$$ZI$$Base[];
+    extern uint32_t               Image$$ARM_LIB_STACK$$ZI$$Length[];
+    #define HEAP_START            ((unsigned char*) Image$$ARM_LIB_HEAP$$ZI$$Base)
+    #define HEAP_SIZE             ((uint32_t) Image$$ARM_LIB_HEAP$$ZI$$Length)
+    #define ISR_STACK_START       ((unsigned char*)Image$$ARM_LIB_STACK$$ZI$$Base)
+    #define ISR_STACK_SIZE        ((uint32_t)Image$$ARM_LIB_STACK$$ZI$$Length)
+#elif defined(__GNUC__)
+    extern uint32_t               __StackTop[];
+    extern uint32_t               __StackLimit[];
+    extern uint32_t               __end__[];
+    extern uint32_t               __HeapLimit[];
+    #define HEAP_START            ((unsigned char*)__end__)
+    #define HEAP_SIZE             ((uint32_t)((uint32_t)__HeapLimit - (uint32_t)HEAP_START))
+    #define ISR_STACK_START       ((unsigned char*)__StackLimit)
+    #define ISR_STACK_SIZE        ((uint32_t)((uint32_t)__StackTop - (uint32_t)__StackLimit))
+#elif defined(__ICCARM__)
+    /* No region declarations needed */
+#else
+    #error "no toolchain defined"
+#endif
+
+#endif
+
+#endif  // MBED_MBED_RTX_H
diff -r 000000000000 -r a7c449cd2d5a targets/TARGET_NXP/mbed_rtx4.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_NXP/mbed_rtx4.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,205 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MBED_MBED_RTX_H
+#define MBED_MBED_RTX_H
+
+#if defined(TARGET_LPC11U68)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x10008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_LPC11U24)        \
+     || defined(TARGET_LPC11U35_401)  \
+     || defined(TARGET_LPC11U35_501)  \
+     || defined(TARGET_LPCCAPPUCCINO)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x10002000UL)
+#endif
+
+     // RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_LPC1114)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x10001000UL)
+#endif
+
+ // RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_LPC1347)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x10002000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                72000000
+#endif
+
+#elif defined(TARGET_LPC1549)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x02009000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                72000000
+#endif
+
+#elif defined(TARGET_LPC1768)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x10008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                96000000
+#endif
+
+#elif defined(TARGET_LPC4088) || defined(TARGET_LPC4088_DM)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x10010000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                120000000
+#endif
+
+#elif defined(TARGET_LPC4330) || defined(TARGET_LPC4337)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x10008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                204000000
+#endif
+
+#elif defined(TARGET_LPC812)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x10001000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                36000000
+#endif
+
+#elif defined(TARGET_LPC824) || defined(TARGET_SSCI824)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x10002000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                30000000
+#endif
+
+#endif
+
+#endif  // MBED_MBED_RTX_H
diff -r 000000000000 -r a7c449cd2d5a targets/TARGET_ONSEMI/mbed_rtx4.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_ONSEMI/mbed_rtx4.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,40 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MBED_MBED_RTX_H
+#define MBED_MBED_RTX_H
+
+#if defined(TARGET_NCS36510)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x40000000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                32000000
+#endif
+
+#endif
+
+#endif  // MBED_MBED_RTX_H
diff -r 000000000000 -r a7c449cd2d5a targets/TARGET_RENESAS/mbed_rtx4.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_RENESAS/mbed_rtx4.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,25 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef MBED_MBED_RTX_H
+#define MBED_MBED_RTX_H
+
+#if defined(TARGET_RZ_A1H) || defined(TARGET_VK_RZ_A1H)
+#ifndef OS_CLOCK
+#define OS_CLOCK         12000000
+#endif
+#endif
+
+#endif  // MBED_MBED_RTX_H
diff -r 000000000000 -r a7c449cd2d5a targets/TARGET_STM/mbed_rtx4.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_STM/mbed_rtx4.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,869 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MBED_MBED_RTX_H
+#define MBED_MBED_RTX_H
+
+#if defined(TARGET_STM32F051R8)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20002000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_STM32L031K6)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20002000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          112
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                32000000
+#endif
+
+#elif defined(TARGET_STM32F070RB)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20004000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_STM32F072RB)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20004000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_STM32F091RC)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_STM32F100RB)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20002000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                24000000
+#endif
+
+#elif defined(TARGET_STM32F103RB)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20005000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                72000000
+#endif
+
+#elif defined(TARGET_STM32F207ZG)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20020000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                120000000
+#endif
+
+#elif defined(TARGET_STM32F303VC)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x2000A000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                72000000
+#endif
+
+#elif defined(TARGET_STM32F334C8)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20003000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          112
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                72000000
+#endif
+
+#elif defined(TARGET_STM32F302R8)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20004000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                72000000
+#endif
+
+#elif defined(TARGET_STM32F303K8)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20003000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          112
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                64000000
+#endif
+
+#elif defined(TARGET_STM32F303RE)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20010000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          112
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                72000000
+#endif
+
+#elif defined(TARGET_STM32F303ZE)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20010000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          112
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                72000000
+#endif
+
+#elif defined(TARGET_STM32F334R8)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20003000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          112
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                72000000
+#endif
+
+#elif defined(TARGET_STM32F446VE)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20020000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                180000000
+#endif
+
+#elif defined(TARGET_STM32F401VC)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20010000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                84000000
+#endif
+
+#elif (defined(TARGET_STM32F429ZI) || defined(TARGET_STM32F439ZI))
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20030000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                168000000
+#endif
+
+#elif defined(TARGET_UBLOX_EVK_ODIN_W2)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20030000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          512
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                168000000
+#endif
+
+#elif defined(TARGET_UBLOX_C030)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20030000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          512
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                168000000
+#endif
+
+#elif defined(TARGET_STM32F469NI)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20050000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                168000000
+#endif
+
+#elif defined(TARGET_STM32F405RG)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20020000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+
+#elif defined(TARGET_STM32F401RE)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20018000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                84000000
+#endif
+
+#elif defined(TARGET_STM32F410RB)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                100000000
+#endif
+
+#elif defined(TARGET_MTS_MDOT_F411RE) || defined (TARGET_MTS_DRAGONFLY_F411RE)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20020000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          1024
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                96000000
+#endif
+
+#elif defined(TARGET_STM32F411RE)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20020000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                100000000
+#endif
+
+#elif defined(TARGET_STM32F412ZG)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20040000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                100000000
+#endif
+
+#elif defined(TARGET_STM32F413ZH)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20050000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                100000000
+#endif
+
+
+#elif defined(TARGET_STM32F446RE)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20020000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                180000000
+#endif
+
+#elif defined(TARGET_STM32F446ZE)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20020000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                180000000
+#endif
+
+#elif defined(TARGET_STM32F407VG)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20020000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                168000000
+#endif
+
+#elif defined(TARGET_STM32F746NG)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20050000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                216000000
+#endif
+
+#elif (defined(TARGET_STM32F746ZG) || defined(TARGET_STM32F756ZG))
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20050000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                216000000
+#endif
+
+#elif defined(TARGET_STM32F767ZI)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20080000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                216000000
+#endif
+
+#elif defined(TARGET_STM32F769NI)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20080000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                216000000
+#endif
+
+#elif defined(TARGET_STM32L053C8)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20002000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          112
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                32000000
+#endif
+
+#elif defined(TARGET_STM32L031K6)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20002000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          112
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                32000000
+#endif
+
+#elif defined(TARGET_STM32L053R8)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20002000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          112
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                32000000
+#endif
+
+#elif defined(TARGET_STM32L072CZ)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20005000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          112
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                32000000
+#endif
+
+#elif defined(TARGET_STM32L073RZ)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20005000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          112
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                32000000
+#endif
+
+#elif defined(TARGET_STM32L152RC)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                24000000
+#endif
+
+#elif defined(TARGET_STM32L152RE)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20014000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                32000000
+#endif
+
+#elif defined(TARGET_NZ32_SC151)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                32000000
+#endif
+
+#elif defined(TARGET_XDOT_L151CC)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                32000000
+#endif
+
+#elif defined(TARGET_STM32L476VG) || defined(TARGET_STM32L475VG)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20018000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                80000000
+#endif
+
+#elif defined(TARGET_STM32L432KC)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x2000C000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                80000000
+#endif
+
+#elif (defined(TARGET_STM32L476RG) || defined(TARGET_STM32L486RG))
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20018000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                80000000
+#endif
+
+#endif
+
+#endif  // MBED_MBED_RTX_H
diff -r 000000000000 -r a7c449cd2d5a targets/TARGET_Silicon_Labs/mbed_rtx4.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Silicon_Labs/mbed_rtx4.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,134 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MBED_MBED_RTX_H
+#define MBED_MBED_RTX_H
+
+#include <stdint.h>
+#include "clocking.h"
+
+#ifndef OS_CLOCK
+#define OS_CLOCK                  REFERENCE_FREQUENCY
+#endif
+
+#if defined(TARGET_EFM32GG_STK3700)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20020000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+
+#elif defined(TARGET_EFM32HG_STK3400)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20002000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          112
+#endif
+
+#elif defined(TARGET_EFM32LG_STK3600)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+
+#elif defined(TARGET_EFM32PG_STK3401)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+
+#elif defined(TARGET_EFM32WG_STK3800)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20008000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+
+#elif defined(TARGET_EFR32MG1)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20007C00UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              5
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+
+#elif defined(TARGET_EFR32MG12) || defined(TARGET_EFM32PG12)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20040000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              14
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          256
+#endif
+
+#endif
+
+#endif  // MBED_MBED_RTX_H
diff -r 000000000000 -r a7c449cd2d5a targets/TARGET_WIZNET/mbed_rtx4.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_WIZNET/mbed_rtx4.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,76 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MBED_MBED_RTX_H
+#define MBED_MBED_RTX_H
+
+#if defined(TARGET_WIZWIKI_W7500)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20004000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                20000000
+#endif
+
+#elif defined(TARGET_WIZWIKI_W7500P)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20004000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                20000000
+#endif
+
+#elif defined(TARGET_WIZWIKI_W7500ECO)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x20004000UL)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                20000000
+#endif
+
+#endif //
+
+#endif // MBED_MBED_RTX_H
diff -r 000000000000 -r a7c449cd2d5a targets/TARGET_ublox/mbed_rtx4.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_ublox/mbed_rtx4.h	Mon Feb 03 13:41:14 2020 +0000
@@ -0,0 +1,39 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016 u-blox
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef MBED_MBED_RTX_H
+#define MBED_MBED_RTX_H
+
+#if defined(TARGET_HI2110)
+
+#ifndef INITIAL_SP
+#define INITIAL_SP              (0x01000000 + 0x05000 - 256)
+#endif
+
+// RTX 4 only config below, for backward-compability
+
+#ifndef OS_TASKCNT
+#define OS_TASKCNT              6
+#endif
+#ifndef OS_MAINSTKSIZE
+#define OS_MAINSTKSIZE          128
+#endif
+#ifndef OS_CLOCK
+#define OS_CLOCK                48000000
+#endif
+#endif
+
+#endif  // MBED_MBED_RTX_H