怎么用两个定时器同时输出两个pwm波，这个只能输出一个方波，新手跪求

Wxiaoyu

#include "pwm.h"
void TIM3_GPIO_Config(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3|RCC_APB1Periph_TIM2,ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
    //RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

    GPIO_InitStructure.GPIO_Pin= GPIO_Pin_6|GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Mode= GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed= GPIO_Speed_50MHz;

    GPIO_Init(GPIOA,&GPIO_InitStructure);

}

void TIM3_Mode_Config(u16 CCR1_Val)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

    TIM_TimeBaseStructure.TIM_Period=7199;
    TIM_TimeBaseStructure.TIM_Prescaler=0;
    TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);


    TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse=CCR1_Val;
    TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;
    TIM_OC1Init(TIM3,&TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM3,TIM_OCPreload_Enable);

    TIM_ARRPreloadConfig(TIM3,ENABLE);

    TIM_Cmd(TIM3,ENABLE);

}

void TIM2_Mode_Config(u16 CCR2_Val)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    TIM_OCInitTypeDef TIM_OCInitStructure;

  TIM_TimeBaseStructure.TIM_Period=7199;
    TIM_TimeBaseStructure.TIM_Prescaler=0;
    TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure);


    TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_Pulse=CCR2_Val;
    TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;
    TIM_OC2Init(TIM2,&TIM_OCInitStructure);
    TIM_OC2PreloadConfig(TIM2,TIM_OCPreload_Enable);

    TIM_ARRPreloadConfig(TIM2,ENABLE);

    TIM_Cmd(TIM2,ENABLE);

}
#include "sys.h"
#include "delay.h"
#include "pwm.h"
int main(void)
{

    delay_init();                      
          LED_Init();       
    TIM3_GPIO_Config();
   TIM3_Mode_Config(3600);
   TIM2_Mode_Config(3600);
}

定制123

需要清空更新中断标志位

xyl210xyl

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