| /** |
| ****************************************************************************** |
| * @file system_stm32f4xx.h |
| * @author MCD Application Team |
| * @brief CMSIS Cortex-M4 Device System Source File for STM32F4xx devices. |
| ****************************************************************************** |
| * @attention |
| * |
| * Copyright (c) 2017 STMicroelectronics. |
| * All rights reserved. |
| * |
| * This software is licensed under terms that can be found in the LICENSE file |
| * in the root directory of this software component. |
| * If no LICENSE file comes with this software, it is provided AS-IS. |
| * |
| ****************************************************************************** |
| */ |
| |
| /** @addtogroup CMSIS |
| * @{ |
| */ |
| |
| /** @addtogroup stm32f4xx_system |
| * @{ |
| */ |
| |
| /** |
| * @brief Define to prevent recursive inclusion |
| */ |
| #ifndef __SYSTEM_STM32F4XX_H |
| #define __SYSTEM_STM32F4XX_H |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /** @addtogroup STM32F4xx_System_Includes |
| * @{ |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| |
| /** @addtogroup STM32F4xx_System_Exported_types |
| * @{ |
| */ |
| /* This variable is updated in three ways: |
| 1) by calling CMSIS function SystemCoreClockUpdate() |
| 2) by calling HAL API function HAL_RCC_GetSysClockFreq() |
| 3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency |
| 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 STM32F4xx_System_Exported_Constants |
| * @{ |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| /** @addtogroup STM32F4xx_System_Exported_Macros |
| * @{ |
| */ |
| |
| /** |
| * @} |
| */ |
| |
| /** @addtogroup STM32F4xx_System_Exported_Functions |
| * @{ |
| */ |
| |
| extern void SystemInit(void); |
| extern void SystemCoreClockUpdate(void); |
| /** |
| * @} |
| */ |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /*__SYSTEM_STM32F4XX_H */ |
| |
| /** |
| * @} |
| */ |
| |
| /** |
| * @} |
| */ |
