FDCAN transmit and receive not working in M4 core in STM32H747I-DISCO board.

[Pavankumar1_]

Hi, I am using STM32H747I-DISCO board, I configured FDCAN it is working fine in M7 core but the same code is not working in M4 core , I changed the FDCAN initializer from M7 to M4 core in STM32CubeMX. 

Here is my FDCAN initialization. 

/* USER CODE BEGIN FDCAN2_Init 0 */

  /* USER CODE END FDCAN2_Init 0 */

  /* USER CODE BEGIN FDCAN2_Init 1 */

  /* USER CODE END FDCAN2_Init 1 */

  hfdcan2.Instance = FDCAN2;

  hfdcan2.Init.FrameFormat = FDCAN_FRAME_FD_NO_BRS;

  hfdcan2.Init.Mode = FDCAN_MODE_NORMAL;

  hfdcan2.Init.AutoRetransmission = ENABLE;

  hfdcan2.Init.TransmitPause = DISABLE;

  hfdcan2.Init.ProtocolException = DISABLE;

  hfdcan2.Init.NominalPrescaler = 5;

  hfdcan2.Init.NominalSyncJumpWidth = 3;

  hfdcan2.Init.NominalTimeSeg1 = 16;

  hfdcan2.Init.NominalTimeSeg2 = 3;

  hfdcan2.Init.DataPrescaler = 5;

  hfdcan2.Init.DataSyncJumpWidth = 9;

  hfdcan2.Init.DataTimeSeg1 = 10;

  hfdcan2.Init.DataTimeSeg2 = 9;

  hfdcan2.Init.MessageRAMOffset = 0;

  hfdcan2.Init.StdFiltersNbr = 9;

  hfdcan2.Init.ExtFiltersNbr = 0;

  hfdcan2.Init.RxFifo0ElmtsNbr = 0;

  hfdcan2.Init.RxFifo0ElmtSize = FDCAN_DATA_BYTES_8;

  hfdcan2.Init.RxFifo1ElmtsNbr = 0;

  hfdcan2.Init.RxFifo1ElmtSize = FDCAN_DATA_BYTES_8;

  hfdcan2.Init.RxBuffersNbr = 9;

  hfdcan2.Init.RxBufferSize = FDCAN_DATA_BYTES_8;

  hfdcan2.Init.TxEventsNbr = 0;

  hfdcan2.Init.TxBuffersNbr = 0;

  hfdcan2.Init.TxFifoQueueElmtsNbr = 1;

  hfdcan2.Init.TxFifoQueueMode = FDCAN_TX_FIFO_OPERATION;

  hfdcan2.Init.TxElmtSize = FDCAN_DATA_BYTES_8;

  if (HAL_FDCAN_Init(&hfdcan2) != HAL_OK)

  {

    Error_Handler();

  }

  /* USER CODE BEGIN FDCAN2_Init 2 */

   FDCAN_FilterTypeDef sFilterConfig;

  sFilterConfig.IdType = FDCAN_STANDARD_ID;

  sFilterConfig.FilterIndex = 0;

  sFilterConfig.FilterType = FDCAN_FILTER_MASK;

  sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXBUFFER;

  sFilterConfig.FilterID1 = 0x100;

  sFilterConfig.FilterID2 = 0x7FF;

  sFilterConfig.RxBufferIndex = 0;

  if (HAL_FDCAN_ConfigFilter(&hfdcan2, &sFilterConfig) != HAL_OK)

  {

  /* Filter configuration Error */

  Error_Handler();

  }

  sFilterConfig.IdType = FDCAN_STANDARD_ID;

  sFilterConfig.FilterIndex = 1;

  sFilterConfig.FilterType = FDCAN_FILTER_MASK;

  sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXBUFFER;

  sFilterConfig.FilterID1 = 0x101;

  sFilterConfig.FilterID2 = 0x7FF;

  sFilterConfig.RxBufferIndex = 1;

  if (HAL_FDCAN_ConfigFilter(&hfdcan2, &sFilterConfig) != HAL_OK)

  {

  /* Filter configuration Error */

  Error_Handler();

  }

  sFilterConfig.IdType = FDCAN_STANDARD_ID;

  sFilterConfig.FilterIndex = 2;

  sFilterConfig.FilterType = FDCAN_FILTER_MASK;

  sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXBUFFER;

  sFilterConfig.FilterID1 = 0x102;

  sFilterConfig.FilterID2 = 0x7FF;

  sFilterConfig.RxBufferIndex = 2;

  if (HAL_FDCAN_ConfigFilter(&hfdcan2, &sFilterConfig) != HAL_OK)

  {

  /* Filter configuration Error */

  Error_Handler();

  }

  sFilterConfig.IdType = FDCAN_STANDARD_ID;

  sFilterConfig.FilterIndex = 3;

  sFilterConfig.FilterType = FDCAN_FILTER_MASK;

  sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXBUFFER;

  sFilterConfig.FilterID1 = 0x103;

  sFilterConfig.FilterID2 = 0x7FF;

  sFilterConfig.RxBufferIndex = 3;

  if (HAL_FDCAN_ConfigFilter(&hfdcan2, &sFilterConfig) != HAL_OK)

  {

  /* Filter configuration Error */

  Error_Handler();

  }

  sFilterConfig.IdType = FDCAN_STANDARD_ID;

  sFilterConfig.FilterIndex = 4;

  sFilterConfig.FilterType = FDCAN_FILTER_MASK;

  sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXBUFFER;

  sFilterConfig.FilterID1 = 0x105;

  sFilterConfig.FilterID2 = 0x7FF;

  sFilterConfig.RxBufferIndex = 4;

  if (HAL_FDCAN_ConfigFilter(&hfdcan2, &sFilterConfig) != HAL_OK)

  {

  /* Filter configuration Error */

  Error_Handler();

  }

   sFilterConfig.IdType = FDCAN_STANDARD_ID;

  sFilterConfig.FilterIndex = 5;

  sFilterConfig.FilterType = FDCAN_FILTER_MASK;

  sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXBUFFER;

  sFilterConfig.FilterID1 = 0x106;

  sFilterConfig.FilterID2 = 0x7FF;

  sFilterConfig.RxBufferIndex = 5;

  if (HAL_FDCAN_ConfigFilter(&hfdcan2, &sFilterConfig) != HAL_OK)

  {

  /* Filter configuration Error */

  Error_Handler();

  }

   sFilterConfig.IdType = FDCAN_STANDARD_ID;

  sFilterConfig.FilterIndex = 6;

  sFilterConfig.FilterType = FDCAN_FILTER_MASK;

  sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXBUFFER;

  sFilterConfig.FilterID1 = 0x107;

  sFilterConfig.FilterID2 = 0x7FF;

  sFilterConfig.RxBufferIndex = 6;

  if (HAL_FDCAN_ConfigFilter(&hfdcan2, &sFilterConfig) != HAL_OK)

  {

  /* Filter configuration Error */

  Error_Handler();

  }

  sFilterConfig.IdType = FDCAN_STANDARD_ID;

  sFilterConfig.FilterIndex = 7;

  sFilterConfig.FilterType = FDCAN_FILTER_MASK;

  sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXBUFFER;

  sFilterConfig.FilterID1 = 0x112;

  sFilterConfig.FilterID2 = 0x7FF;

  sFilterConfig.RxBufferIndex = 7;

  if (HAL_FDCAN_ConfigFilter(&hfdcan2, &sFilterConfig) != HAL_OK)

  {

  /* Filter configuration Error */

  Error_Handler();

  }

  sFilterConfig.IdType = FDCAN_STANDARD_ID;

  sFilterConfig.FilterIndex = 8;

  sFilterConfig.FilterType = FDCAN_FILTER_MASK;

  sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXBUFFER;

  sFilterConfig.FilterID1 = 0x113;

  sFilterConfig.FilterID2 = 0x7FF;

  sFilterConfig.RxBufferIndex = 8;

  if (HAL_FDCAN_ConfigFilter(&hfdcan2, &sFilterConfig) != HAL_OK)

  {

  /* Filter configuration Error */

  Error_Handler();

  }

Please any one help me on this issue with M4 core.

[SofLit · Accepted solution]

Hello,

Attached a simple project of FDCAN2 running in loopback mode on CM4 on STM32H747 DICO board.

The project was ported from this example: https://github.com/STMicroelectronics/STM32CubeH7/tree/master/Projects/STM32H743I-EVAL/Examples/FDCAN/FDCAN_Loopback

Hope it helps.