stm32f407 dma and interrupt ENCODER mode.

[MKara.13]

Hi, I'm pretty new to stm32.

My goal is to use HAL_TIM_Encoder_Start() , HAL_TIM_Encoder_Start_DMA(), HAL_TIM_Encoder_Start_IT() commands from Hal library.

I have the stm32f407 Discovery board.

in polling mode

//-------------------------------------------------------------------------------------
HAL_TIM_Encoder_Start(&htim2, TIM_CHANNEL_ALL);
//-------------------------------------------------------------------------------------
  while (1)
  {
 
	  encoder_value=__HAL_TIM_GET_COUNTER(&htim2);
 
  }

in my code like everything works fine.

now i am trying to start it in interrupt mode.

HAL_TIM_Encoder_Start_IT(&htim2, TIM_CHANNEL_ALL);

TIM2_IRQHandler(void)

TIM2_IRQHandler(void)
 
{
 
 HAL_TIM_IRQHandler(&htim2);
 
uint32_t encoder_value=0;
 
 encoder_value=__HAL_TIM_GET_COUNTER(&htim2);
 
}

I know we have to write it inside the function but I couldn't get the values somehow.

Any Help?

[waclawek.jan]

> HAL_TIM_Encoder_Start_IT(&htim2, TIM_CHANNEL_ALL);

Check return value.

Read out and check/post TIM registers content.

Check if you have enabled respective interrupt(s) in NVIC, if the ISR is properly named etc.

JW

[Muhammed Güler]

The timer interrupt is activated in case of overflow. You can try reading with DMA.