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Input Capture - HAL library STM32F4xx

Question asked by Viatorus on Feb 22, 2016
Latest reply on Feb 22, 2016 by Clive One
Hello,

I want to get a frequency of an input signal using the stm32f4xx with the HAL library.
Signal comes in PB4. I checked the working input with a simple gpio configuration.

My following input capture code looks like this:
void MX_TIM3_Init(void)
{
  __TIM3_CLK_ENABLE();
 
  HAL_NVIC_SetPriority(TIM3_IRQn, 0, 1);
  HAL_NVIC_EnableIRQ(TIM3_IRQn);
 
  GPIO_InitTypeDef GPIO_InitStruct;
  GPIO_InitStruct.Pin = GPIO_PIN_4;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
  GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
  htim3.Instance = TIM3;
  htim3.Init.Prescaler = 0;
  htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim3.Init.Period = 0xFFFF;
  htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  HAL_TIM_Base_Init(&htim3);
 
  TIM_ClockConfigTypeDef sClockSourceConfig;
  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig);
 
  HAL_TIM_IC_Init(&htim3);
 
  TIM_MasterConfigTypeDef sMasterConfig;
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig);
 
  TIM_IC_InitTypeDef sConfigIC;
  sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
  sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
  sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
  sConfigIC.ICFilter = 0;
  HAL_TIM_IC_ConfigChannel(&htim3, &sConfigIC, TIM_CHANNEL_1);
 
  HAL_TIM_IC_Start_IT(&htim3, TIM_CHANNEL_1);
}
 
void TIM3_IRQHandler(void)
{
  // printf
  if (__HAL_TIM_GET_ITSTATUS(&htim3, TIM_IT_CC1) == SET)
  {
    __HAL_TIM_CLEAR_IT(&htim3, TIM_IT_CC1);
  }
}
But the irq handler gets never called. (Without IC Config it does get called).

Could anyone help me with this? Thank you!

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