STM32F103单片机定时器中断程序及标准库解析

文章目录

高级定时器和普通定时器的区别（https://zhuanlan.zhihu.com/p/557896041）：

定时器1_定时中断

TIM1是高级定时器，使用的时钟总线是RCC_APB2Periph_TIM1，和普通定时器不一样。

timer.c

#include "timer.h"
#include "led.h"
//初始化定时器为中断触发
void TIM1_Init(u16 arr,u16 psc)
{
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); //时钟使能

    //定时器TIM1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(TIM1, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位

    TIM_ITConfig(TIM1,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 = TIM1_UP_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(TIM1, ENABLE);  //使能TIM1

}
/* 定时器1中断服务程序 */
void TIM1_UP_IRQHandler(void)                                    /* TIM1中断 */
{

        if (TIM_GetITStatus(TIM1, TIM_IT_Update) != RESET)  /* 检查TIM1更新中断发生与否 */
        {
            TIM_ClearITPendingBit(TIM1, TIM_IT_Update);   /* 清除TIM1更新中断标志 */

            LED0 = !LED0;
        }
}

timer.h

#ifndef __TIMER_H
#define __TIMER_H
#include "sys.h"

void TIM1_Init(u16 arr,u16 psc);

#endif

调用

TIM1_Init(500 - 1, 7200 - 1);//50ms

定时器2_定时中断

timer.c

#include "timer.h"
#include "led.h"
//初始化定时器为中断触发
void TIM2_Init(u16 arr,u16 psc)
{
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //时钟使能

    //定时器TIM2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(TIM2, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位

    TIM_ITConfig(TIM2,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 = TIM2_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(TIM2, ENABLE);  //使能TIM2

}
/* 定时器2中断服务程序 */
void TIM2_IRQHandler(void)                                    /* TIM2中断 */
{

        if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)  /* 检查TIM2更新中断发生与否 */
        {
            TIM_ClearITPendingBit(TIM2, TIM_IT_Update);   /* 清除TIM2更新中断标志 */

            LED0 = !LED0;
        }
}

timer.h

#ifndef __TIMER_H
#define __TIMER_H
#include "sys.h"

void TIM2_Init(u16 arr,u16 psc);

#endif

调用

TIM2_Init(500 - 1, 7200 - 1);//50ms

定时器3_定时中断

timer.c

#include "timer.h"
#include "led.h"
//初始化定时器为中断触发
void TIM3_Init(u16 arr,u16 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TIM3

}
/* 定时器3中断服务程序 */
void TIM3_IRQHandler(void)                                    /* TIM3中断 */
{

        if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)  /* 检查TIM3更新中断发生与否 */
        {
            TIM_ClearITPendingBit(TIM3, TIM_IT_Update);   /* 清除TIM3更新中断标志 */

            LED0 = !LED0;
        }
}

timer.h

#ifndef __TIMER_H
#define __TIMER_H
#include "sys.h"

void TI3_Init(u16 arr,u16 psc);

#endif

调用

TIM3_Init(500 - 1, 7200 - 1);//50ms

定时器4_定时中断

timer.c

#include "timer.h"
#include "led.h"
//初始化定时器为中断触发
void TIM4_Init(u16 arr,u16 psc)
{
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); //时钟使能

    //定时器TIM4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(TIM4, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位

    TIM_ITConfig(TIM4,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 = TIM4_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(TIM4, ENABLE);  //使能TIM4

}

/* 定时器4中断服务程序 */
void TIM4_IRQHandler(void)                                    /* TIM4中断 */
{

    if (TIM_GetITStatus(TIM4, TIM_IT_Update) != RESET)  /* 检查TIM4更新中断发生与否 */
    {
        TIM_ClearITPendingBit(TIM4, TIM_IT_Update);   /* 清除TIM4更新中断标志 */

				LED0 = !LED0;
    }
}

timer.h

#ifndef __TIMER_H
#define __TIMER_H
#include "sys.h"


void TIM4_Init(u16 arr,u16 psc);


#endif

调用

TIM4_Init(500 - 1, 7200 - 1);//50ms

定时器5_定时中断

timer.c

#include "timer.h"
#include "led.h"
//初始化定时器为中断触发
void TIM5_Init(u16 arr,u16 psc)
{
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE); //时钟使能

    //定时器TIM5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(TIM5, &TIM_TimeBaseStructure); //根据指定的参数初始化TIMx的时间基数单位

    TIM_ITConfig(TIM5,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 = TIM5_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(TIM5, ENABLE);  //使能TIM5

}
/* 定时器5中断服务程序 */
void TIM5_IRQHandler(void)                                    /* TIM5中断 */
{

    if (TIM_GetITStatus(TIM5, TIM_IT_Update) != RESET)  /* 检查TIM5更新中断发生与否 */
    {
        TIM_ClearITPendingBit(TIM5, TIM_IT_Update);   /* 清除TIM5更新中断标志 */

        LED0 = !LED0;
    }
}

timer.h

#ifndef __TIMER_H
#define __TIMER_H
#include "sys.h"


void TIM5_Init(u16 arr,u16 psc);


#endif

调用

TIM5_Init(500 - 1, 7200 - 1);//50ms