Bare-metal configuration with EventQueue for a Bluepill board.

Warning

It does not work with the Mbed Online Compiler.

Follow these steps to import and compile it with Mbed CLI:

mbed import https://os.mbed.com/users/hudakz/code/Baremetal_EventQue_Bluepill
mbed compile -t GCC_ARM -m bluepill
Revision:
0:2cf53c219693
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TARGET_BLUEPILL/device/stm32f1xx.h	Thu May 14 05:27:57 2020 +0000
@@ -0,0 +1,238 @@
+/**
+  ******************************************************************************
+  * @file    stm32f1xx.h
+  * @author  MCD Application Team
+  * @version V4.2.0
+  * @date    31-March-2017
+  * @brief   CMSIS STM32F1xx Device Peripheral Access Layer Header File. 
+  *
+  *          The file is the unique include file that the application programmer
+  *          is using in the C source code, usually in main.c. This file contains:
+  *            - Configuration section that allows to select:
+  *              - The STM32F1xx device used in the target application
+  *              - To use or not the peripheral’s drivers in application code(i.e. 
+  *                code will be based on direct access to peripheral’s registers 
+  *                rather than drivers API), this option is controlled by 
+  *                "#define USE_HAL_DRIVER"
+  *  
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
+  *
+  * Redistribution and use in source and binary forms, with or without modification,
+  * are permitted provided that the following conditions are met:
+  *   1. Redistributions of source code must retain the above copyright notice,
+  *      this list of conditions and the following disclaimer.
+  *   2. 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.
+  *   3. Neither the name of STMicroelectronics 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 THE COPYRIGHT HOLDER OR 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.
+  *
+  ******************************************************************************
+  */
+
+/** @addtogroup CMSIS
+  * @{
+  */
+
+/** @addtogroup stm32f1xx
+  * @{
+  */
+    
+#ifndef __STM32F1XX_H
+#define __STM32F1XX_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif /* __cplusplus */
+  
+/** @addtogroup Library_configuration_section
+  * @{
+  */
+
+/**
+  * @brief STM32 Family
+  */
+#if !defined (STM32F1)
+#define STM32F1
+#endif /* STM32F1 */
+
+/* Uncomment the line below according to the target STM32L device used in your 
+   application 
+  */
+
+#if !defined (STM32F100xB) && !defined (STM32F100xE) && !defined (STM32F101x6) && \
+    !defined (STM32F101xB) && !defined (STM32F101xE) && !defined (STM32F101xG) && !defined (STM32F102x6) && !defined (STM32F102xB) && !defined (STM32F103x6) && \
+    !defined (STM32F103xB) && !defined (STM32F103xE) && !defined (STM32F103xG) && !defined (STM32F105xC) && !defined (STM32F107xC)
+  /* #define STM32F100xB */   /*!< STM32F100C4, STM32F100R4, STM32F100C6, STM32F100R6, STM32F100C8, STM32F100R8, STM32F100V8, STM32F100CB, STM32F100RB and STM32F100VB */
+  /* #define STM32F100xE */   /*!< STM32F100RC, STM32F100VC, STM32F100ZC, STM32F100RD, STM32F100VD, STM32F100ZD, STM32F100RE, STM32F100VE and STM32F100ZE */
+  /* #define STM32F101x6 */   /*!< STM32F101C4, STM32F101R4, STM32F101T4, STM32F101C6, STM32F101R6 and STM32F101T6 Devices */
+  /* #define STM32F101xB */   /*!< STM32F101C8, STM32F101R8, STM32F101T8, STM32F101V8, STM32F101CB, STM32F101RB, STM32F101TB and STM32F101VB */
+  /* #define STM32F101xE */   /*!< STM32F101RC, STM32F101VC, STM32F101ZC, STM32F101RD, STM32F101VD, STM32F101ZD, STM32F101RE, STM32F101VE and STM32F101ZE */ 
+  /* #define STM32F101xG */   /*!< STM32F101RF, STM32F101VF, STM32F101ZF, STM32F101RG, STM32F101VG and STM32F101ZG */
+  /* #define STM32F102x6 */   /*!< STM32F102C4, STM32F102R4, STM32F102C6 and STM32F102R6 */
+  /* #define STM32F102xB */   /*!< STM32F102C8, STM32F102R8, STM32F102CB and STM32F102RB */
+  /* #define STM32F103x6 */   /*!< STM32F103C4, STM32F103R4, STM32F103T4, STM32F103C6, STM32F103R6 and STM32F103T6 */
+#define STM32F103xB           /*!< STM32F103C8, STM32F103R8, STM32F103T8, STM32F103V8, STM32F103CB, STM32F103RB, STM32F103TB and STM32F103VB */
+  /* #define STM32F103xE */   /*!< STM32F103RC, STM32F103VC, STM32F103ZC, STM32F103RD, STM32F103VD, STM32F103ZD, STM32F103RE, STM32F103VE and STM32F103ZE */
+  /* #define STM32F103xG */   /*!< STM32F103RF, STM32F103VF, STM32F103ZF, STM32F103RG, STM32F103VG and STM32F103ZG */
+  /* #define STM32F105xC */   /*!< STM32F105R8, STM32F105V8, STM32F105RB, STM32F105VB, STM32F105RC and STM32F105VC */
+  /* #define STM32F107xC */   /*!< STM32F107RB, STM32F107VB, STM32F107RC and STM32F107VC */  
+#endif
+
+/*  Tip: To avoid modifying this file each time you need to switch between these
+        devices, you can define the device in your toolchain compiler preprocessor.
+  */
+  
+#if !defined  (USE_HAL_DRIVER)
+/**
+ * @brief Comment the line below if you will not use the peripherals drivers.
+   In this case, these drivers will not be included and the application code will 
+   be based on direct access to peripherals registers 
+   */
+#define USE_HAL_DRIVER
+#endif /* USE_HAL_DRIVER */
+
+/**
+  * @brief CMSIS Device version number V4.2.0
+  */
+#define __STM32F1_CMSIS_VERSION_MAIN   (0x04) /*!< [31:24] main version */
+#define __STM32F1_CMSIS_VERSION_SUB1   (0x02) /*!< [23:16] sub1 version */
+#define __STM32F1_CMSIS_VERSION_SUB2   (0x00) /*!< [15:8]  sub2 version */
+#define __STM32F1_CMSIS_VERSION_RC     (0x00) /*!< [7:0]  release candidate */ 
+#define __STM32F1_CMSIS_VERSION        ((__STM32F1_CMSIS_VERSION_MAIN << 24)\
+                                       |(__STM32F1_CMSIS_VERSION_SUB1 << 16)\
+                                       |(__STM32F1_CMSIS_VERSION_SUB2 << 8 )\
+                                       |(__STM32F1_CMSIS_VERSION_RC))
+
+/**
+  * @}
+  */
+
+/** @addtogroup Device_Included
+  * @{
+  */
+
+#if defined(STM32F100xB)
+  #include "stm32f100xb.h"
+#elif defined(STM32F100xE)
+  #include "stm32f100xe.h"
+#elif defined(STM32F101x6)
+  #include "stm32f101x6.h"
+#elif defined(STM32F101xB)
+  #include "stm32f101xb.h"
+#elif defined(STM32F101xE)
+  #include "stm32f101xe.h"
+#elif defined(STM32F101xG)
+  #include "stm32f101xg.h"
+#elif defined(STM32F102x6)
+  #include "stm32f102x6.h"
+#elif defined(STM32F102xB)
+  #include "stm32f102xb.h"
+#elif defined(STM32F103x6)
+  #include "stm32f103x6.h"
+#elif defined(STM32F103xB)
+  #include "stm32f103xb.h"
+#elif defined(STM32F103xE)
+  #include "stm32f103xe.h"
+#elif defined(STM32F103xG)
+  #include "stm32f103xg.h"
+#elif defined(STM32F105xC)
+  #include "stm32f105xc.h"
+#elif defined(STM32F107xC)
+  #include "stm32f107xc.h"
+#else
+ #error "Please select first the target STM32F1xx device used in your application (in stm32f1xx.h file)"
+#endif
+
+/**
+  * @}
+  */
+
+/** @addtogroup Exported_types
+  * @{
+  */  
+typedef enum 
+{
+  RESET = 0, 
+  SET = !RESET
+} FlagStatus, ITStatus;
+
+typedef enum 
+{
+  DISABLE = 0, 
+  ENABLE = !DISABLE
+} FunctionalState;
+#define IS_FUNCTIONAL_STATE(STATE) (((STATE) == DISABLE) || ((STATE) == ENABLE))
+
+typedef enum 
+{
+  ERROR = 0, 
+  SUCCESS = !ERROR
+} ErrorStatus;
+
+/**
+  * @}
+  */
+
+
+/** @addtogroup Exported_macros
+  * @{
+  */
+#define SET_BIT(REG, BIT)     ((REG) |= (BIT))
+
+#define CLEAR_BIT(REG, BIT)   ((REG) &= ~(BIT))
+
+#define READ_BIT(REG, BIT)    ((REG) & (BIT))
+
+#define CLEAR_REG(REG)        ((REG) = (0x0))
+
+#define WRITE_REG(REG, VAL)   ((REG) = (VAL))
+
+#define READ_REG(REG)         ((REG))
+
+#define MODIFY_REG(REG, CLEARMASK, SETMASK)  WRITE_REG((REG), (((READ_REG(REG)) & (~(CLEARMASK))) | (SETMASK)))
+
+#define POSITION_VAL(VAL)     (__CLZ(__RBIT(VAL))) 
+
+
+/**
+  * @}
+  */
+
+#if defined (USE_HAL_DRIVER)
+ #include "stm32f1xx_hal.h"
+#endif /* USE_HAL_DRIVER */
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __STM32F1xx_H */
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+  
+
+
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/