定时器控制LED灯

main.c:

#include "stm32f10x.h"
#include "delay.h"
#include "timer.h"
#include "led.h"

int main()
{
	delay_init();
	NVIC_Configuration();
	TIM2_Init(20000-1,7200-1); //7200个脉冲计时加1，0.1ms，数20000个数，就是2s
	TIM3_Init(10000-1,7200-1); //7200个脉冲计时加1，0.1ms，数10000个数，就是1s
	LED_Init();
	
	while(1)
	{
		
	}
}

led.h:

#ifndef __LED_H
#define __LED_H

#include "sys.h"

#define LED1 PBout(8)
#define LED2 PBout(9)

void LED_Init(void);

#endif

led.c:

#include "led.h"
#include "stm32f10x.h"

void LED_Init(void)
{
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
	
	GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 ; 
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
	GPIO_Init(GPIOB, &GPIO_InitStructure);
	
	LED1=LED2=0;
}

timer.h:

#ifndef _TIMER_H
#define _TIMER_H

#include "sys.h"

void TIM2_Init(u16 arr,u16 psc);
void TIM3_Init(u16 arr,u16 psc);

#endif

timer.c:

#include "timer.h"
#include "stm32f10x.h"

#define LED1 PBout(8)
#define LED2 PBout(9)
#define LED3 PBout(10)
#define LED4 PBout(11)

/*
功能：定时器TIM3初始化
输入参数：arr自动重装载的数值，psc预分频系数（多少个脉冲计数一次）
输出参数：无
*/ 
void TIM3_Init(u16 arr,u16 psc)
{
	//所有步骤的最先一步:打开时钟
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE); //打开TIM3的时钟

	
	//第一步：时钟使能
	TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
	TIM_TimeBaseStructure.TIM_Period = arr;			//每次数arr+1个数才产生一次溢出
	TIM_TimeBaseStructure.TIM_Prescaler = psc;  //psc个脉冲才计数一次
	TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;	//内部高速时钟72MHz
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_TimeBaseInit(TIM3, & TIM_TimeBaseStructure); 
	
	//第二步：清楚中断标志位
	TIM_ClearITPendingBit(TIM3, TIM_IT_Update); 	//清楚中断
	
	//第三步：设置TIM3的更新中断
	TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE );	
	
	//第四步：配置TIM3的中断（NVIC）
	NVIC_InitTypeDef NVIC_InitStructure; 
	NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;		//抢占优先级 （只有一个无所谓）
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;  //子优先级 （0-3）
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //一定要enable
	NVIC_Init(&NVIC_InitStructure); 
	                           
	//第五步：使能定时器
	TIM_Cmd(TIM3, ENABLE);
	
}

void TIM3_IRQHandler()
{
	if(TIM_GetFlagStatus(TIM3, TIM_FLAG_Update) == SET) 
	{
		LED1=~LED1;
	}
	//记得手动清零标识位
	TIM_ClearITPendingBit(TIM3, TIM_IT_Update); 
}

void TIM2_Init(u16 arr,u16 psc)
{
	//所有步骤的最先一步:打开时钟
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE); //打开TIM2的时钟

	
	//第一步：时钟使能
	TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
	TIM_TimeBaseStructure.TIM_Period = arr;			//每次数arr+1个数才产生一次溢出
	TIM_TimeBaseStructure.TIM_Prescaler = psc;  //psc个脉冲才计数一次
	TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;	//内部高速时钟72MHz
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_TimeBaseInit(TIM2, & TIM_TimeBaseStructure); 
	
	//第二步：清楚中断标志位
	TIM_ClearITPendingBit(TIM2, TIM_IT_Update); 	//清楚中断
	
	//第三步：设置TIM2的更新中断
	TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE );	
	
	//第四步：配置TIM2的中断（NVIC）
	NVIC_InitTypeDef NVIC_InitStructure; 
	NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;		//抢占优先级 （只有一个无所谓）
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;  //子优先级 （0-3）
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //一定要enable
	NVIC_Init(&NVIC_InitStructure); 
	                           
	//第五步：使能定时器
	TIM_Cmd(TIM2, ENABLE);
	
}

void TIM2_IRQHandler()
{
	if(TIM_GetFlagStatus(TIM2, TIM_FLAG_Update) == SET) 
	{
		LED2=~LED2;
	}
	//记得手动清零标识位
	TIM_ClearITPendingBit(TIM2, TIM_IT_Update); 
}