定时器控制LED灯闪烁（定时器1）

TIM.c文件

#include "TIM1.h"

void TIM1_Init(void)

{

    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

 NVIC_InitTypeDef NVIC_InitStructure;

 //使能定时器1时钟

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);  

TIM_TimeBaseStructure.TIM_Period = (10000-1);//ARR

TIM_TimeBaseStructure.TIM_Prescaler = (7200-1);

TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

TIM_TimeBaseInit(TIM1, & TIM_TimeBaseStructure);

 //使能定时器1的中断

 TIM_ITConfig(TIM1,TIM_IT_Update,ENABLE);

    //配置定时器中断优先等级

NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn ;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

    //使能定时器1

TIM_Cmd(TIM1,ENABLE);

}

主函数

#include "sys.h"

#include "led.h"

#include "TIM1.h"

#include "delay.h"

int main()

{   

NVIC_Configuration();

Led_Init();

TIM1_Init();

delay_init();

while(1)

{

 delay_ms(100);

}

}

void  TIM1_UP_IRQHandler(void)

{

 TIM_ClearFlag(TIM1,TIM_FLAG_Update);

    LED=~LED;

}