文章目录
- STM32中文参考手册V10.pdf
- TIM1 的四路PWM
- TIM2 的四路PWM
- TIM3 的四路PWM
- TIM4 的四路PWM
STM32中文参考手册V10.pdf
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
