stm32 系统定时器 SysTick

系统定时器原理以及结构

系统定时器的时间计算

SysTick结构体

SysTick固件库函数

SysTick中断优先级

SysTick应用

1.编写一个us延时的函数

2.编写一个ms延时的函数

SysTick.c

#include "stm32f10x.h"                  // Device header
#include "SysTick.h"

void ms_delay(uint32_t ms)
{
	uint32_t i;
	SysTick_Config(72000);
	for(i=0;i<ms;i++)
	{
			while(  !( (SysTick->CTRL) &(1<<16) ) );
	}
		SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;



}

void us_delay(uint32_t us)
{
	uint32_t i;
	SysTick_Config(72);
	for(i=0;i<us;i++)
	{
			while(  !( (SysTick->CTRL) &(1<<16) ) );
	}
		SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;



}

SysTick.h

#include "stm32f10x.h" 

void ms_delay(uint32_t ms);

void us_delay(uint32_t us);

main.c

#include "stm32f10x.h"                  // Device header
#include "usart.h"
#include "led.h"
#include "tim.h"
#include "motor.h"
#include "SysTick.h"


void delay(uint16_t time)
{
		uint16_t i = 0;
		while(time--)
		{
			i=12000;
			while(i--);
		}
}

int main(void)
{
		
		 LED_Init();
			
		 GPIO_SetBits( GPIOC,  GPIO_Pin_13);

	while(1)
	{
		 GPIO_ResetBits( GPIOC,  GPIO_Pin_13);
		 ms_delay(500);
		 GPIO_SetBits( GPIOC,  GPIO_Pin_13);
		 ms_delay(500);
	
	}
	
}

参考：https://blog.csdn.net/u012523921/article/details/89923478?utm_medium=distribute.pc_relevant.none-task-blog-OPENSEARCH-1.control&dist_request_id=&depth_1-utm_source=distribute.pc_relevant.none-task-blog-OPENSEARCH-1.control