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108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
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/**
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******************************************************************************
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* @file system_stm32l4xx.h
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* @author MCD Application Team
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* @brief CMSIS Cortex-M4 Device System Source File for STM32L4xx devices.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under Apache License, Version 2.0,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/Apache-2.0
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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 stm32l4xx_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_STM32L4XX_H
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#define __SYSTEM_STM32L4XX_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** @addtogroup STM32L4xx_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 STM32L4xx_System_Exported_Variables
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* @{
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*/
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/* The SystemCoreClock 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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extern const uint32_t MSIRangeTable[12]; /*!< MSI ranges table values */
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/**
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* @}
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*/
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/** @addtogroup STM32L4xx_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 STM32L4xx_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 STM32L4xx_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_STM32L4XX_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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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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