DFSDM STM32F413

[JJJJBababy]

while (1) {
if (DmaRecHalfBuffCplt == 1) {
/* Store values on Play buff */
for (int i = 0; i < 1024; i++) {
PlayBuff[2 * i] = (int16_t) SaturaLH((RecBuff[i] >> 8), -32768,
32767);
PlayBuff[(2 * i) + 1] = PlayBuff[2 * i];
}
HAL_UART_Transmit_DMA(&huart1, (uint8_t*) PlayBuff, 4096);
DmaRecHalfBuffCplt = 0;
}
if (DmaRecBuffCplt == 1) {
/* Store values on Play buff */
for (int i = 1024; i < 2048; i++) {
PlayBuff[2 * i] = (int16_t) SaturaLH((RecBuff[i] >> 8), -32768,
32767);
PlayBuff[(2 * i) + 1] = PlayBuff[2 * i];
}
DmaRecBuffCplt = 0;
}
/* USER CODE END WHILE */
}

I try to use the AudioTrack Android SDK api to play the PlayBuff data,but i saw The PlayBuff array consists mainly of repeated values FF 7F 80 00. What could be the reason for this? 

[SofLit]

Hello and welcome to the community.

Please read these recommendations on this link on how to post threads on this community, especially the posting of a code source.

Thank you for your understanding.

[JJJJBababy]

void MX_DFSDM2_Init(void)
{

  /* USER CODE BEGIN DFSDM2_Init 0 */

  /* USER CODE END DFSDM2_Init 0 */

  /* USER CODE BEGIN DFSDM2_Init 1 */

  /* USER CODE END DFSDM2_Init 1 */
  hdfsdm2_filter0.Instance = DFSDM2_Filter0;
  hdfsdm2_filter0.Init.RegularParam.Trigger = DFSDM_FILTER_SW_TRIGGER;
  hdfsdm2_filter0.Init.RegularParam.FastMode = ENABLE;
  hdfsdm2_filter0.Init.RegularParam.DmaMode = ENABLE;
  hdfsdm2_filter0.Init.FilterParam.SincOrder = DFSDM_FILTER_SINC4_ORDER;
  hdfsdm2_filter0.Init.FilterParam.Oversampling = 128;
  hdfsdm2_filter0.Init.FilterParam.IntOversampling = 1;
  if (HAL_DFSDM_FilterInit(&hdfsdm2_filter0) != HAL_OK)
  {
    Error_Handler();
  }
  hdfsdm2_channel1.Instance = DFSDM2_Channel1;
  hdfsdm2_channel1.Init.OutputClock.Activation = ENABLE;
  hdfsdm2_channel1.Init.OutputClock.Selection = DFSDM_CHANNEL_OUTPUT_CLOCK_AUDIO;
  hdfsdm2_channel1.Init.OutputClock.Divider = 10;
  hdfsdm2_channel1.Init.Input.Multiplexer = DFSDM_CHANNEL_EXTERNAL_INPUTS;
  hdfsdm2_channel1.Init.Input.DataPacking = DFSDM_CHANNEL_STANDARD_MODE;
  hdfsdm2_channel1.Init.Input.Pins = DFSDM_CHANNEL_SAME_CHANNEL_PINS;
  hdfsdm2_channel1.Init.SerialInterface.Type = DFSDM_CHANNEL_SPI_RISING;
  hdfsdm2_channel1.Init.SerialInterface.SpiClock = DFSDM_CHANNEL_SPI_CLOCK_INTERNAL;
  hdfsdm2_channel1.Init.Awd.FilterOrder = DFSDM_CHANNEL_FASTSINC_ORDER;
  hdfsdm2_channel1.Init.Awd.Oversampling = 1;
  hdfsdm2_channel1.Init.Offset = 0;
  hdfsdm2_channel1.Init.RightBitShift = 0x05;
  if (HAL_DFSDM_ChannelInit(&hdfsdm2_channel1) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_DFSDM_FilterConfigRegChannel(&hdfsdm2_filter0, DFSDM_CHANNEL_1, DFSDM_CONTINUOUS_CONV_ON) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN DFSDM2_Init 2 */

  /* USER CODE END DFSDM2_Init 2 */

}



void HAL_DFSDM_FilterRegConvHalfCpltCallback(DFSDM_Filter_HandleTypeDef *hdfsdm_filter) {
	DmaRecHalfBuffCplt = 1;
}

void HAL_DFSDM_FilterRegConvCpltCallback(DFSDM_Filter_HandleTypeDef *hdfsdm_filter) {
	DmaRecBuffCplt = 1;
}