STM32F103C8T6 定时器实现LED闪烁（标准库）_stm32定时器控制led闪烁标准库

#include "stm32f10x.h"
 
void GPIO_Config(void)                                                                                                                        
{ 
    GPIO_InitTypeDef GPIO_IntStructure;
	
  	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);//开启GPIOA时钟
 
		GPIO_IntStructure.GPIO_Mode= GPIO_Mode_Out_PP;//设置为推挽模式
		GPIO_IntStructure.GPIO_Pin= GPIO_Pin_4;//初始化4号引脚
		GPIO_IntStructure.GPIO_Speed= GPIO_Speed_50MHz;//GPIO速度，赋值为50MHz
		GPIO_Init(GPIOA,&GPIO_IntStructure);//将赋值后的构体变量传递给GPIO_Init函数
 
    GPIO_SetBits(GPIOA,GPIO_Pin_4); //关闭LED
}
 
//初始化定时器和中断
void TIM3_Int_Init(uint16_t arr,uint16_t psc)
{
  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
 
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //时钟使能
	
	//定时器TIM3初始化
	TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值	
	TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值
	TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割:TDTS = Tck_tim
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
	TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位
 
	TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //使能指定的TIM3中断,允许更新中断
 
	//中断优先级NVIC设置
	NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;  //TIM3中断
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  //先占优先级0级
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;  //从优先级3级
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
	NVIC_Init(&NVIC_InitStructure);  //初始化NVIC寄存器
 
	TIM_Cmd(TIM3, ENABLE);  //使能TIMx					 
}
 
void TIM3_IRQHandler(void)
{
    //判断TIM3更新中断是否发生
    if(TIM_GetITStatus(TIM3,TIM_IT_Update)!=RESET)
    {
    //必须清除标志位
    TIM_ClearITPendingBit(TIM3,TIM_IT_Update);
    //状态取反
    GPIO_WriteBit(GPIOA,GPIO_Pin_4,(BitAction)(!GPIO_ReadOutputDataBit(GPIOA,GPIO_Pin_4)));
    }
 
}
 
 
//主函数
int main(void)
{
    GPIO_Config();
 
	  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);  //中断优先级分组
   
    TIM3_Int_Init(4999,7199); //((1+arr )/72M)*(1+psc )=((1+1999)/72M)*(1+35999)=1秒
    while(1){
			 
		}
 
}
 

并不需要delay延时函数，程序会自动触发中断函数