f0x.at1/Drivers/CMSIS/Device/ST/STM32L4xx/Include/system_stm32l4xx.h
2022-05-15 22:42:00 +02:00

107 lines
2.4 KiB
C

/**
******************************************************************************
* @file system_stm32l4xx.h
* @author MCD Application Team
* @brief CMSIS Cortex-M4 Device System Source File for STM32L4xx 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 stm32l4xx_system
* @{
*/
/**
* @brief Define to prevent recursive inclusion
*/
#ifndef __SYSTEM_STM32L4XX_H
#define __SYSTEM_STM32L4XX_H
#ifdef __cplusplus
extern "C" {
#endif
/** @addtogroup STM32L4xx_System_Includes
* @{
*/
/**
* @}
*/
/** @addtogroup STM32L4xx_System_Exported_Variables
* @{
*/
/* The SystemCoreClock 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 */
extern const uint32_t MSIRangeTable[12]; /*!< MSI ranges table values */
/**
* @}
*/
/** @addtogroup STM32L4xx_System_Exported_Constants
* @{
*/
/**
* @}
*/
/** @addtogroup STM32L4xx_System_Exported_Macros
* @{
*/
/**
* @}
*/
/** @addtogroup STM32L4xx_System_Exported_Functions
* @{
*/
extern void SystemInit(void);
extern void SystemCoreClockUpdate(void);
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /*__SYSTEM_STM32L4XX_H */
/**
* @}
*/
/**
* @}
*/