Problem with TIM3 Input capture with DMA

[VSchu.1]

Hello everybody,

I am trying to use the TIM3 those input capture mode with DMA transfer. After buffer is full the DMA call the callback function IT. Then i execute the stop DMA function. But after this sequence, the DMA no reinitialize. I am using the Cube MX for initialize the code.

What could I be doing wrong?

I am using the STM32C011F6P6

The code:

uint16_t period_buffer[52];

HAL_TIM_IC_Start_DMA(&htim3, TIM_CHANNEL_1, (uint32_t*) period_buffer, 52);

void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
{
       HAL_TIM_IC_Stop_DMA(&htim3, TIM_CHANNEL_1);
}

[Sarra.S]

Hello @VSchu.1, 

Please share your DMA configuration

I suppose you're configuring DMA in circular mode, if you're using normal mode you need to reinitialize the DMA transfer manually in the callback function. 

[nouirakh]

Hello @VSchu.1 

In order to reproduce the possible issue, could you please provide more details on your setting project if possible, attach your .ioc file/configuration.

[waclawek.jan]

> But after this sequence, the DMA no reinitialize.

What does this mean?

What are the symptoms, and how are they different from the expected behaviour?

JW

[VSchu.1 · Accepted solution]

I'm operating in normal mode, I had to include one more command to solve the problem:

void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)

{

       if(htim->Channel == HAL_TIM_ACTIVE_CHANNEL_1)

      {

              HAL_TIM_IC_Stop_DMA(&htim3, TIM_CHANNEL_1);

              HAL_DMA_Abort(&hdma_tim3_ch1); //this solves the problem

     }

}