STM32F407ZGT6 TIM8 CH2/3 PWM 互补不输出

只看该作者 · 2018-7-9 13:46

下面是程序
TIM8定时器好像是工作了，但，PWM无输出
void IO_Configuration(void)
{
      GPIO_InitTypeDef  GPIO_InitStructure;

      GPIO_InitStructure.GPIO_Pin = GPIO_PinSource0|GPIO_PinSource1;
      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(GPIOB,&GPIO_InitStructure);

      GPIO_PinAFConfig(GPIOC,GPIO_PinSource7|GPIO_PinSource8,GPIO_AF_TIM8);
      GPIO_PinAFConfig(GPIOB,GPIO_PinSource0|GPIO_PinSource1,GPIO_AF_TIM8);
}

void TIM_Configuration(void)
{

  TIM_TimeBaseInitTypeDef TIM_TimeBaseStruct;
  TIM_DeInit(TIM8);
  TIM_TimeBaseStruct.TIM_Period                   = 7000;
  TIM_TimeBaseStruct.TIM_Prescaler          = 0;
  TIM_TimeBaseStruct.TIM_ClockDivision       = TIM_CKD_DIV1;
  TIM_TimeBaseStruct.TIM_CounterMode    = TIM_CounterMode_Up;
  TIM_TimeBaseStruct.TIM_RepetitionCounter  = 0;
  TIM_TimeBaseInit(TIM8, &TIM_TimeBaseStruct);
}

void PWM_Configuration(void)
{
      TIM_OCInitTypeDef       TIM_OCInitStructure;
      TIM_BDTRInitTypeDef    TIM8_BDTRInitStruct;

      TIM_OCInitStructure.TIM_OCMode                = TIM_OCMode_PWM1;
      TIM_OCInitStructure.TIM_OutputState          = TIM_OutputState_Enable;
      TIM_OCInitStructure.TIM_OutputNState          = TIM_OutputNState_Enable;
      TIM_OCInitStructure.TIM_Pulse                      = 0;
      TIM_OCInitStructure.TIM_OCPolarity                = TIM_OCPolarity_High;
      TIM_OCInitStructure.TIM_OCNPolarity                = TIM_OCNPolarity_High;
      TIM_OCInitStructure.TIM_OCIdleState                = TIM_OCIdleState_Reset;
      TIM_OCInitStructure.TIM_OCNIdleState                = TIM_OCIdleState_Reset;
      TIM_OC2Init(TIM8, &TIM_OCInitStructure);

      TIM_OCInitStructure.TIM_OCMode                = TIM_OCMode_PWM1;
      TIM_OCInitStructure.TIM_OutputState          = TIM_OutputState_Enable;
      TIM_OCInitStructure.TIM_OutputNState          = TIM_OutputNState_Enable;
      TIM_OCInitStructure.TIM_Pulse                      = 0;
      TIM_OCInitStructure.TIM_OCPolarity                = TIM_OCPolarity_High;
      TIM_OCInitStructure.TIM_OCNPolarity                = TIM_OCNPolarity_High;
      TIM_OCInitStructure.TIM_OCIdleState                = TIM_OCIdleState_Reset;
      TIM_OCInitStructure.TIM_OCNIdleState                = TIM_OCIdleState_Reset;
      TIM_OC3Init(TIM8, &TIM_OCInitStructure);

      TIM_OC2PreloadConfig(TIM8, TIM_OCPreload_Enable);
      TIM_OC3PreloadConfig(TIM8, TIM_OCPreload_Enable);

      TIM8_BDTRInitStruct.TIM_OSSRState                      = TIM_OSSRState_Enable;
      TIM8_BDTRInitStruct.TIM_OSSIState                      = TIM_OSSIState_Enable;
      TIM8_BDTRInitStruct.TIM_LOCKLevel                      = TIM_LOCKLevel_OFF;
      TIM8_BDTRInitStruct.TIM_DeadTime                         = 0x10;
      TIM8_BDTRInitStruct.TIM_Break                            = TIM_Break_Disable;
      TIM8_BDTRInitStruct.TIM_BreakPolarity       = TIM_BreakPolarity_High;
      TIM8_BDTRInitStruct.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
      TIM_BDTRConfig(TIM8, &TIM8_BDTRInitStruct);

      TIM_ARRPreloadConfig(TIM8, ENABLE);
      TIM_ClearITPendingBit(TIM8,TIM_IT_Update);
      TIM_ITConfig(TIM8,TIM_IT_Update,ENABLE);
      TIM_CtrlPWMOutputs(TIM8, ENABLE);

      TIM_CCxCmd(TIM8,TIM_Channel_2,TIM_CCx_Enable);
      TIM_CCxNCmd(TIM8,TIM_Channel_2,TIM_CCxN_Enable);
      TIM_CCxCmd(TIM8,TIM_Channel_3,TIM_CCx_Enable);
      TIM_CCxNCmd(TIM8,TIM_Channel_3,TIM_CCxN_Enable);
}

STM32F407ZGT6 TIM8 CH2/3 PWM 互补不输出

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