STM32F103单片机定时器和多路PWM详解（TIM1、TIM2、TIM3、TIM4）

文章目录

STM32中文参考手册V10.pdf

下图是定时器相关引脚：

在《STM32中文参考手册V10.pdf》有写：

TIM1 的四路PWM

TIM1 的PWM是带互补输出的，较为高级和复杂，有兴趣可以参考其他介绍文章，这里的代码让7个引脚输出PWM。

调用：

	TIM1_PWM_Init( 7200, 0 );                                       /* 10KHz */
	TIM_SetCompare1( TIM1, 2000 );
	TIM_SetCompare2( TIM1, 2000 );
	TIM_SetCompare3( TIM1, 2000 );
	TIM_SetCompare4( TIM1, 2000 );

这里没有重映射，注意不能把PA9 PA10 初始化成串口去了。
timer.c

#include "timer.h"
#include "led.h"


//TIM1 PWM部分初始化
//PWM输出初始化
//arr：自动重装值
//psc：时钟预分频数
//配置7路PWM
void TIM1_PWM_Init(u16 arr, u16 psc) {
    GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);    //使能定时器1时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);  //使能GPIO外设和AFIO复用功能模块时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);  //使能GPIO外设和AFIO复用功能模块时钟

    //设置该引脚为复用输出功能
    GPIO_InitStructure.GPIO_Pin =
            GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11; //TIM1_CH1 TIM1_CH2 TIM1_CH3 TIM1_CH4
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIO

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15; //TIM1_CH1N TIM1_CH2N TIM1_CH3N
    GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIO

    //初始化TIM1
    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 = 0; //设置时钟分割:TDTS = Tck_tim
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
    TIM_TimeBaseStructure.TIM_RepetitionCounter = 0; //重复计数设置
    TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

    //初始化TIM1 Channel1 PWM模式
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式1
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
    TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable; //比较输出N使能
    TIM_OCInitStructure.TIM_Pulse = 3600; //设置待装入捕获比较寄存器的脉冲值
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
    TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High; //输出N极性:TIM输出比较N极性高
    TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset; //空闲状态下输出比较:TIM输出比较空闲状态下为低
    TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset; //空闲状态下输出N比较:TIM输出比较N空闲状态下为低
    TIM_OC1Init(TIM1, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM1 OC1

    //初始化TIM1 Channel2 PWM模式
    TIM_OCInitStructure.TIM_Pulse = 3600; //设置待装入捕获比较寄存器的脉冲值
    TIM_OC2Init(TIM1, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM1 OC2

    //初始化TIM1 Channel3 PWM模式
    TIM_OCInitStructure.TIM_Pulse = 3600; //设置待装入捕获比较寄存器的脉冲值
    TIM_OC3Init(TIM1, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM1 OC3

    //初始化TIM1 Channel4 PWM模式
    TIM_OCInitStructure.TIM_Pulse = 3600; //设置待装入捕获比较寄存器的脉冲值
    TIM_OC4Init(TIM1, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM1 OC4


    TIM_Cmd(TIM1,ENABLE);
    TIM_CtrlPWMOutputs(TIM1,ENABLE);

    
		
}

timer.h

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

void TIM1_PWM_Init(u16 arr,u16 psc);

#endif

TIM2 的四路PWM

调用：

	TIM2_PWM_Init( 7200, 0 );                                       /* 10KHz */
	TIM_SetCompare1( TIM2, 2000 );
	TIM_SetCompare2( TIM2, 2000 );
	TIM_SetCompare3( TIM2, 2000 );
	TIM_SetCompare4( TIM2, 2000 );

这里没有重映射。
timer.c

#include "timer.h"
#include "led.h"


//TIM2 PWM部分初始化
//PWM输出初始化
//arr：自动重装值
//psc：时钟预分频数
//配置7路PWM
void TIM2_PWM_Init(u16 arr, u16 psc) {
    GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    TIM_OCInitTypeDef  TIM_OCInitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);	//使能定时器2时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA  | RCC_APB2Periph_AFIO, ENABLE);  //使能GPIO外设和AFIO复用功能模块时钟

    //设置该引脚为复用输出功能
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3; //TIM2_CH1 TIM2_CH2 TIM2_CH3 TIM2_CH4
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIO

    //初始化TIM2
    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 = 0; //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TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式1
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高

    TIM_OC1Init(TIM2, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM2 OC1
    TIM_OC2Init(TIM2, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM2 OC2
    TIM_OC3Init(TIM2, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM2 OC3
    TIM_OC4Init(TIM2, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM2 OC4

    TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);  //使能TIM2在CCR1上的预装载寄存器
    TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);  //使能TIM2在CCR2上的预装载寄存器
    TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Enable);  //使能TIM2在CCR3上的预装载寄存器
    TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Enable);  //使能TIM2在CCR4上的预装载寄存器

    TIM_Cmd(TIM2, ENABLE);  //使能TIM2
}

timer.h

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

void TIM2_PWM_Init(u16 arr,u16 psc);

#endif

TIM3 的四路PWM

调用：

	TIM3_PWM_Init( 7200, 0 );                                       /* 10KHz */
	TIM_SetCompare1( TIM3, 3600 );
	TIM_SetCompare2( TIM3, 3600 );
	TIM_SetCompare3( TIM3, 3600 );
	TIM_SetCompare4( TIM3, 3600 );

这里没有重映射：
timer.c

#include "timer.h"
#include "led.h"

//TIM3 PWM部分初始化
//PWM输出初始化
//arr：自动重装值
//psc：时钟预分频数
void TIM3_PWM_Init(u16 arr,u16 psc)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    TIM_OCInitTypeDef  TIM_OCInitStructure;


    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);	//使能定时器3时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA  | RCC_APB2Periph_AFIO, ENABLE);  //使能GPIO外设和AFIO复用功能模块时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB  | RCC_APB2Periph_AFIO, ENABLE);  //使能GPIO外设和AFIO复用功能模块时钟


    //设置该引脚为复用输出功能
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7; //TIM3_CH1 TIM3_CH2
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIO

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1; //TIM3_CH3 TIM3_CH4
    GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIO

    //初始化TIM3
    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 = 0; //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TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式1
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
    TIM_OC1Init(TIM3, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM3 OC1

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式2
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
    TIM_OC2Init(TIM3, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM3 OC2

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式3
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
    TIM_OC3Init(TIM3, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM3 OC3

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式4
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
    TIM_OC4Init(TIM3, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM3 OC4

    TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);  //使能TIM3在CCR1上的预装载寄存器
    TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);  //使能TIM3在CCR2上的预装载寄存器
    TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);  //使能TIM3在CCR3上的预装载寄存器
    TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);  //使能TIM3在CCR4上的预装载寄存器

    TIM_Cmd(TIM3, ENABLE);  //使能TIM3
}

timer.h

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

void TIM3_PWM_Init(u16 arr,u16 psc);

#endif

TIM4 的四路PWM

调用：

	TIM4_PWM_Init( 7200, 0 );                                       /* 10KHz */
	TIM_SetCompare1( TIM4, 2000 );
	TIM_SetCompare2( TIM4, 2000 );
	TIM_SetCompare3( TIM4, 2000 );
	TIM_SetCompare4( TIM4, 2000 );

这里没有重映射：
timer.c

#include "timer.h"
#include "led.h"



//TIM4 PWM部分初始化
//PWM输出初始化
//arr：自动重装值
//psc：时钟预分频数
void TIM4_PWM_Init(u16 arr,u16 psc)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
    TIM_OCInitTypeDef  TIM_OCInitStructure;


    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);	//使能定时器4时钟
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB  | RCC_APB2Periph_AFIO, ENABLE);  //使能GPIO外设和AFIO复用功能模块时钟

    //设置该引脚为复用输出功能
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9; //TIM4_CH1 TIM4_CH2 TIM4_CH3 TIM4_CH4
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化GPIO

    //初始化TIM4
    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 = 0; //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TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式1
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //输出极性:TIM输出比较极性高
    TIM_OC1Init(TIM4, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM4 OC1

    TIM_OC2Init(TIM4, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM4 OC2
    TIM_OC3Init(TIM4, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM4 OC3
    TIM_OC4Init(TIM4, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM4 OC4
    
    TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);  //使能TIM4在CCR1上的预装载寄存器
    TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);  //使能TIM4在CCR2上的预装载寄存器
    TIM_OC3PreloadConfig(TIM4, TIM_OCPreload_Enable);  //使能TIM4在CCR3上的预装载寄存器
    TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Enable);  //使能TIM4在CCR4上的预装载寄存器
    
    TIM_Cmd(TIM4, ENABLE);  //使能TIM4
		
}

timer.h

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

void TIM4_PWM_Init(u16 arr,u16 psc);

#endif