/*******************************************************************************
* @file system_stm32f4xx.h
* @author MCD Application Team
* @brief CMSIS Cortex-M4 Device System Source File for STM32F4xx devices.
* <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
*****************************************************************************/
#pragma once
#ifdef __cplusplus
extern "C" {
#endif
/* 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
extern void SystemInit(void);
extern void SystemCoreClockUpdate(void);
#ifdef __cplusplus
}
#endif
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