diff -r 86f099bda525 -r 8f2be7aaec00 src/TARGET_STM32F303xE/device/system_stm32f3xx.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/TARGET_STM32F303xE/device/system_stm32f3xx.h	Thu Oct 15 01:12:31 2020 +0200
@@ -0,0 +1,124 @@
+/**
+  ******************************************************************************
+  * @file    system_stm32f3xx.h
+  * @author  MCD Application Team
+  * @brief   CMSIS Cortex-M4 Device System Source File for STM32F3xx devices.  
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2016 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 stm32f3xx_system
+  * @{
+  */  
+  
+/**
+  * @brief Define to prevent recursive inclusion
+  */
+#ifndef __SYSTEM_STM32F3XX_H
+#define __SYSTEM_STM32F3XX_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif 
+
+/** @addtogroup STM32F3xx_System_Includes
+  * @{
+  */
+
+/**
+  * @}
+  */
+
+
+/** @addtogroup STM32F3xx_System_Exported_types
+  * @{
+  */
+  /* This variable is updated in three ways:
+      1) by calling CMSIS function SystemCoreClockUpdate()
+      3) by calling HAL API function HAL_RCC_GetHCLKFreq()
+      3) by calling HAL API function HAL_RCC_ClockConfig()
+         Note: If you use this function to configure the system clock; then there
+               is no need to call the 2 first functions listed above, since SystemCoreClock
+               variable is updated automatically.
+  */
+extern uint32_t SystemCoreClock;          /*!< System Clock Frequency (Core Clock) */
+extern const uint8_t AHBPrescTable[16];   /*!< AHB prescalers table values */
+extern const uint8_t APBPrescTable[8];    /*!< APB prescalers table values */
+
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32F3xx_System_Exported_Constants
+  * @{
+  */
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32F3xx_System_Exported_Macros
+  * @{
+  */
+
+/**
+  * @}
+  */
+
+/** @addtogroup STM32F3xx_System_Exported_Functions
+  * @{
+  */
+  
+extern void SystemInit(void);
+extern void SystemCoreClockUpdate(void);
+extern void SetSysClock(void);
+
+/**
+  * @}
+  */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*__SYSTEM_STM32F3XX_H */
+
+/**
+  * @}
+  */
+  
+/**
+  * @}
+  */  
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/