STM32F769I: no IT for DMA2 Stream 1

[TheCodeurFou]

Hello,

I am blocked with a personnal project using a STM32F769I-DISCO, TouchGFX and audio: DMA IT is not triggered. I have no idea why, no idea how to investigate more in the code. I will provide few things in my question, not because I don't want but because I don't know yet what to provide.

I created a project with TouchGFX Designer and now I want to add the BSP code to play audio. My code initialize all devices (created by the tool) and try to play audio

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DSIHOST_DSI_Init();
  MX_LTDC_Init();
  MX_FMC_Init();
  MX_QUADSPI_Init();
  MX_DMA2D_Init();
  MX_I2C4_Init();
  MX_LIBJPEG_Init();
  MX_CRC_Init();
  MX_USART1_UART_Init();
  MX_DFSDM1_Init();
  MX_SAI1_Init();
  MX_I2S1_Init();
  MX_TouchGFX_Init();
  /* Call PreOsInit function */
  MX_TouchGFX_PreOSInit();
  /* USER CODE BEGIN 2 */
  /* Init audio */
  initAudio();
  playAudio();
  while(1);

 Audio code

/**
  * @brief  Plays the audio file
  * @PAram  None
  * @retval None
  */
void playAudio(void)
{
//	BSP_AUDIO_OUT_Play((uint16_t*)&ptrAudio, sizeAudio);
	BSP_AUDIO_OUT_Play((uint16_t*)&A_subtle_radar_ping_wav, A_subtle_radar_ping_wav_len);
}

/**
  * @brief  Initialize the audio player
  * @PAram  None
  * @retval None
  */
void initAudio(void)
{
	GetFileInfo(info);
	BSP_AUDIO_OUT_Init(OUTPUT_DEVICE_AUTO, uwVolume, info->SampleRate);
}

 With this code, the audio file is played, nice. But it's played in a loop which is not what I want. If it could play only once, it would be nice.

So I created a smaller project with CubeIDE to learn. Same DFSDM1, SAI1, I2S1 init, same "audio code": audio loops as before.

I found an ugly way : IT number 57 (DMA2_Stream1)is fired, which then call a callback

/**
  * @brief  Calculates the remaining file size and new position of the pointer.
  * @PAram  None
  * @retval None
  */
void BSP_AUDIO_OUT_TransferComplete_CallBack(void)
{
  BSP_AUDIO_OUT_Stop(CODEC_PDWN_SW);
}

Ugly, but audio is then stopped and I also know that DMA IT is also working.

But when I try to do the same in my previous big TouchGFX code, I saw (debug) that IT is enabled but never fired.

So, questions are:

 - Is there a way to specify to configure the DMA not as a loop but a single shot?

 - Why IT is not fired? What should I investigate? Even if there is a positive answer to my previous question, I would like to understand what is wrong witht the IT