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104 lines
2.3 KiB
104 lines
2.3 KiB
/** |
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****************************************************************************** |
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* @file system_stm32f4xx.h |
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* @author MCD Application Team |
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* @brief CMSIS Cortex-M4 Device System Source File for STM32F4xx devices. |
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****************************************************************************** |
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* @attention |
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* |
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* Copyright (c) 2017 STMicroelectronics. |
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* All rights reserved. |
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* |
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* This software is licensed under terms that can be found in the LICENSE file |
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* in the root directory of this software component. |
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* If no LICENSE file comes with this software, it is provided AS-IS. |
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* |
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****************************************************************************** |
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*/ |
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/** @addtogroup CMSIS |
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* @{ |
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*/ |
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/** @addtogroup stm32f4xx_system |
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* @{ |
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*/ |
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/** |
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* @brief Define to prevent recursive inclusion |
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*/ |
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#ifndef __SYSTEM_STM32F4XX_H |
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#define __SYSTEM_STM32F4XX_H |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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/** @addtogroup STM32F4xx_System_Includes |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @addtogroup STM32F4xx_System_Exported_types |
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* @{ |
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*/ |
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/* This variable is updated in three ways: |
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1) by calling CMSIS function SystemCoreClockUpdate() |
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2) by calling HAL API function HAL_RCC_GetSysClockFreq() |
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3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency |
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Note: If you use this function to configure the system clock; then there |
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is no need to call the 2 first functions listed above, since SystemCoreClock |
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variable is updated automatically. |
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*/ |
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extern uint32_t SystemCoreClock; /*!< System Clock Frequency (Core Clock) */ |
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extern const uint8_t AHBPrescTable[16]; /*!< AHB prescalers table values */ |
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extern const uint8_t APBPrescTable[8]; /*!< APB prescalers table values */ |
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/** |
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* @} |
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*/ |
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/** @addtogroup STM32F4xx_System_Exported_Constants |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @addtogroup STM32F4xx_System_Exported_Macros |
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* @{ |
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*/ |
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/** |
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* @} |
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*/ |
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/** @addtogroup STM32F4xx_System_Exported_Functions |
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* @{ |
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*/ |
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extern void SystemInit(void); |
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extern void SystemCoreClockUpdate(void); |
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/** |
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* @} |
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*/ |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /*__SYSTEM_STM32F4XX_H */ |
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/** |
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* @} |
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*/ |
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/** |
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* @} |
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*/
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