STM32F4 TIM3 4路PWM输出

STM32F4正点原子板子定时器3的四路PWM输出

以下为PWM.h

#ifndef _PWM_H

#define _PWM_H

#include "sys.h"

void PWM_TIM3_Init(u32 arr,u32 psc);

void setPWM(uint32_t pwm1,uint32_t pwm2,uint32_t pwm3,uint32_t pwm4);

#endif

以下为PWM.c

#include "pwm.h"

void PWM_TIM3_Init(u32 arr,u32 psc)

{

//´Ë²¿·ÖÐèÊÖ¶¯ÐÞ¸ÄIO¿ÚÉèÖÃ

GPIO_InitTypeDef GPIO_InitStructure;

TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

TIM_OCInitTypeDef  TIM_OCInitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);  //TIM3ʱÖÓʹÄÜ   

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE); //ʹÄÜPORTCʱÖÓ

GPIO_PinAFConfig(GPIOC,GPIO_PinSource6,GPIO_AF_TIM3); //GPIOC

GPIO_PinAFConfig(GPIOC,GPIO_PinSource7,GPIO_AF_TIM3); //GPIOC

GPIO_PinAFConfig(GPIOC,GPIO_PinSource8,GPIO_AF_TIM3); //GPIOC

GPIO_PinAFConfig(GPIOC,GPIO_PinSource9,GPIO_AF_TIM3); //GPIOC6,7,8,9¸´ÓÃΪ¶¨Ê±Æ÷3

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9; //GPIOC6.7.8.9

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;        //¸´Óù¦ÄÜ

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;  //ËÙ¶È100MHz

GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;      //ÍÆÍ츴ÓÃÊä³ö

GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;        //ÉÏÀ­

GPIO_Init(GPIOC,&GPIO_InitStructure);              //³õʼ»¯PC¹Ü½Å

TIM_TimeBaseStructure.TIM_Prescaler=psc;  //¶¨Ê±Æ÷·ÖƵ

TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; //ÏòÉϼÆÊýģʽ

TIM_TimeBaseStructure.TIM_Period=arr;  //×Ô¶¯ÖØ×°ÔØÖµ

TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;

TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);//³õʼ»¯¶¨Ê±Æ÷3

//³õʼ»¯TIM14 Channel1 PWMģʽ

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //Ñ¡Ôñ¶¨Ê±Æ÷ģʽ:TIMÂö³å¿í¶Èµ÷ÖÆģʽ2

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //±È½ÏÊä³öʹÄÜ

TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //Êä³ö¼«ÐÔ:TIMÊä³ö±È½Ï¼«ÐÔµÍ

TIM_OC1Init(TIM3, &TIM_OCInitStructure);  //¸ù¾ÝTÖ¸¶¨µÄ²ÎÊý³õʼ»¯ÍâÉèTIM3OC1

TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);  //ʹÄÜTIM3ÔÚCCR1ÉϵÄԤװÔؼĴæÆ÷

TIM_OC2Init(TIM3, &TIM_OCInitStructure);  //¸ù¾ÝTÖ¸¶¨µÄ²ÎÊý³õʼ»¯ÍâÉèTIM3OC2

TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);  //ʹÄÜTIM3ÔÚCCR1ÉϵÄԤװÔؼĴæÆ÷

TIM_OC3Init(TIM3, &TIM_OCInitStructure);  //¸ù¾ÝTÖ¸¶¨µÄ²ÎÊý³õʼ»¯ÍâÉèTIM3OC3

TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);  //ʹÄÜTIM3ÔÚCCR1ÉϵÄԤװÔؼĴæÆ÷

TIM_OC4Init(TIM3, &TIM_OCInitStructure);  //¸ù¾ÝTÖ¸¶¨µÄ²ÎÊý³õʼ»¯ÍâÉèTIM3OC4

TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);  //ʹÄÜTIM3ÔÚCCR1ÉϵÄԤװÔؼĴæÆ÷

  TIM_ARRPreloadConfig(TIM3,ENABLE);//ARPEʹÄÜ

TIM_Cmd(TIM3, ENABLE);  //ʹÄÜTIM3

} 

void setPWM(uint32_t pwm1,uint32_t pwm2,uint32_t pwm3,uint32_t pwm4)//É趨PWM PC6£¬PC7£¬PC8£¬PC9

{

TIM_SetCompare1(TIM3,pwm1);

TIM_SetCompare2(TIM3,pwm2);

TIM_SetCompare3(TIM3,pwm3);

TIM_SetCompare4(TIM3,pwm4);

}

在主函数中设置分组

初始化定时器3

设定PWM

  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

        PWM_TIM3_Init(1000-1,840-1); //100HZ

        setPWM(200,400,600,800);