system_stm32h7xx.c File Reference

CMSIS Cortex-Mx Device Peripheral Access Layer System Source File. More...

#include "stm32h7xx.h"
#include <math.h>

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Macros
#define	HSE_VALUE   ((uint32_t)25000000)
	Value of the External oscillator in Hz.
#define	CSI_VALUE   ((uint32_t)4000000)
	Value of the Internal oscillator in Hz.
#define	HSI_VALUE   ((uint32_t)64000000)
	Value of the Internal oscillator in Hz.

Functions
void	SystemInit (void)
	Setup the microcontroller system Initialize the FPU setting and vector table location configuration.
void	SystemCoreClockUpdate (void)
	Update SystemCoreClock variable according to Clock Register Values.
void	ExitRun0Mode (void)
	Exit Run* mode and Configure the system Power Supply.

Variables
uint32_t	SystemCoreClock = 64000000
	System Domain1 Clock Frequency.
uint32_t	SystemD2Clock = 64000000
	System Domain2 Clock Frequency.
const uint8_t	D1CorePrescTable [16] = {0, 0, 0, 0, 1, 2, 3, 4, 1, 2, 3, 4, 6, 7, 8, 9}
	D1CorePrescTable prescalers table values.

Detailed Description

CMSIS Cortex-Mx Device Peripheral Access Layer System Source File.

Author

MCD Application Team

This file provides two functions and one global variable to be called from user application:

• ExitRun0Mode(): Specifies the Power Supply source. This function is called at startup just after reset and before the call of SystemInit(). This call is made inside the "startup_stm32h7xx.s" file.
• SystemInit(): This function is called at startup just after reset and before branch to main program. This call is made inside the "startup_stm32h7xx.s" file.
• SystemCoreClock variable: Contains the core clock, it can be used by the user application to setup the SysTick timer or configure other parameters.
• SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must be called whenever the core clock is changed during program execution.

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.

Definition in file system_stm32h7xx.c.