F4_TIM4如何配置4个PWM输出通道

jingxc · 发表于 2017-3-6 10:16:55

使用下列程序的现象：
PD14，PD15有波形输出，PD12 PD13无波形输出；注释掉PD14  15通道，PD13有波形输出，PD12无；注释掉PD13 14 15，PD12 才有波形输出。（同时在主函数中配置了LCD等一些程序不知是否可能影响了）

void TIM4_PWM_Init(u32 arr,u32 psc)
{


      GPIO_InitTypeDef GPIO_InitStructure;
      TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
      TIM_OCInitTypeDef  TIM_OCInitStructure;

      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE);
      RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);

      GPIO_PinAFConfig(GPIOD,GPIO_PinSource12,GPIO_AF_TIM4);
      GPIO_PinAFConfig(GPIOD,GPIO_PinSource13,GPIO_AF_TIM4);
      GPIO_PinAFConfig(GPIOD,GPIO_PinSource14,GPIO_AF_TIM4);
      GPIO_PinAFConfig(GPIOD,GPIO_PinSource15,GPIO_AF_TIM4);

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;

      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
      GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
      GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
      GPIO_Init(GPIOD,&GPIO_InitStructure);

      TIM_TimeBaseStructure.TIM_Prescaler=psc;
      TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
      TIM_TimeBaseStructure.TIM_Period=arr;
      TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;

      TIM_TimeBaseInit(TIM4,&TIM_TimeBaseStructure);

      TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
      TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
      TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OC1Init(TIM4, &TIM_OCInitStructure);
  TIM_OC2Init(TIM4, &TIM_OCInitStructure);
      TIM_OC3Init(TIM4, &TIM_OCInitStructure);
      TIM_OC4Init(TIM4, &TIM_OCInitStructure);

      TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);
  TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);
      TIM_OC3PreloadConfig(TIM4, TIM_OCPreload_Enable);
      TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Enable);

TIM_ARRPreloadConfig(TIM4,ENABLE);

      TIM_Cmd(TIM4, ENABLE);


}  ]