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STM32F4 cannot access input capture interupt

Jeana N over 9 years ago

please look at the code below and tell me what wrong with the configuration. I used Stm32f4 discovery kit, and generated PWM via PC6, then connected it to PE11. However, no interupt occurred.

/*set the led to check if interrupt was access
void TIM1_CC_IRQHandler(void)
{
  if(TIM_GetITStatus(TIM1, TIM_IT_CC2) == SET)
  {
                GPIO_SetBits(GPIOD,GPIO_Pin_15);
    /* Clear TIM1 Capture compare interrupt pending bit */
    TIM_ClearITPendingBit(TIM1, TIM_IT_CC2);
  }
}

int main(void)
{
  TIM3_Config();
  PWM_TIM3_output();
  TIM1_Config();
  TIMICI_config();
  Output_Configuration();//for blue led - GPIOD 15
  while (1){}
}

void TIMICI_config(void)
{
  TIM_ICInitTypeDef  TIM_ICInitStructure;
  TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
  TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
  TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
  TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
  TIM_ICInitStructure.TIM_ICFilter = 0x0;

  TIM_ICInit(TIM1, &TIM_ICInitStructure);
  TIM_PWMIConfig(TIM1, &TIM_ICInitStructure);

  /* Select the TIM1 Input Trigger: TI2FP2 */
  TIM_SelectInputTrigger(TIM1, TIM_TS_TI2FP2);

  /* TIM enable counter */
  TIM_Cmd(TIM1, ENABLE);

  /* Enable the CC2 Interrupt Request */
  TIM_ITConfig(TIM1, TIM_IT_CC2, ENABLE);
}

void TIM1_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;




  /* TIM1 clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);




  /* GPIOE clock enable */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);




  /* TIM1 chennel2 configuration : PE.11 */
  GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_11;
  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_NOPULL ;
  GPIO_Init(GPIOE, &GPIO_InitStructure);




  /* Connect TIM pin to AF2 */
  GPIO_PinAFConfig(GPIOE, GPIO_PinSource11, GPIO_AF_TIM1);




  /* Enable the TIM1 global Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}