Diff: source/hic_hal/nxp/lpc11u35/iap.c

Revision:

0:01f31e923fe2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/hic_hal/nxp/lpc11u35/iap.c	Tue Apr 07 12:55:42 2020 +0200
@@ -0,0 +1,95 @@
+/**
+ * @file    iap.c
+ * @brief
+ *
+ * DAPLink Interface Firmware
+ * Copyright (c) 2017-2017, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+
+#include "iap.h"
+#include "cortex_m.h"
+#include "LPC11Uxx.h"
+
+iap_operation_t iap_op;
+static cortex_int_state_t state;
+static uint32_t lock_count;
+
+// taken code from the Nxp App Note AN11305
+/* This data must be global so it is not read from the stack */
+typedef void (*IAP)(uint32_t [], uint32_t []);
+static const IAP iap_entry = (IAP)0x1fff1ff1;
+#define init_msdstate() *((uint32_t *)(0x10000054)) = 0x0
+
+/* This function resets some microcontroller peripherals to reset
+ * hardware configuration to ensure that the USB In-System Programming module
+ * will work properly. It is normally called from reset and assumes some reset
+ * configuration settings for the MCU.
+ * Some of the peripheral configurations may be redundant in your specific
+ * project.
+ */
+void iap_reinvoke(void)
+{
+    /* make sure USB clock is turned on before calling ISP */
+    LPC_SYSCON->SYSAHBCLKCTRL |= 0x04000;
+    /* make sure 32-bit Timer 1 is turned on before calling ISP */
+    LPC_SYSCON->SYSAHBCLKCTRL |= 0x00400;
+    /* make sure GPIO clock is turned on before calling ISP */
+    LPC_SYSCON->SYSAHBCLKCTRL |= 0x00040;
+    /* make sure IO configuration clock is turned on before calling ISP */
+    LPC_SYSCON->SYSAHBCLKCTRL |= 0x10000;
+    /* make sure AHB clock divider is 1:1 */
+    LPC_SYSCON->SYSAHBCLKDIV = 1;
+    /* Send Reinvoke ISP command to ISP entry point*/
+    iap_op.cmd = 57;
+    init_msdstate();					 /* Initialize Storage state machine */
+    /* Set stack pointer to ROM value (reset default) This must be the last
+     * piece of code executed before calling ISP, because most C expressions
+     * and function returns will fail after the stack pointer is changed.
+     * In addition ensure the CONTROL register is set to 0 so the MSP is
+     * used rather than the PSP.
+     */
+    __set_MSP(*((volatile uint32_t *)0x00000000));
+    __set_CONTROL(0);
+    /* Enter ISP. We call "iap_entry" to enter ISP because the ISP entry is done
+     * through the same command interface as IAP.
+     */
+    iap_entry(&iap_op.cmd, &iap_op.stat);
+    // Not supposed to come back!
+}
+
+void iap_call(iap_operation_t *operation)
+{
+    iap_entry(&operation->cmd, &operation->stat);
+}
+
+void iap_lock()
+{
+    cortex_int_state_t local_state;
+    local_state = cortex_int_get_and_disable();
+    if (lock_count == 0) {
+        state = local_state;
+    }
+    lock_count++;
+}
+
+void iap_unlock()
+{
+    lock_count--;
+    if (lock_count == 0) {
+        cortex_int_restore(state);
+    }
+    
+}