Question
I am working on communication between STM32H735(STM32H735G-DK) and STM32H745(STM32H745I-Disco) via FDCAN according to the official tutorial( he used different MCUs). But I couldn't receive any message by RxData, any idea?
Here is the software setting:
For STM32H735(STM32H745 is the same but with different ID):
-Defines:
/* USER CODE BEGIN PV */
FDCAN_TxHeaderTypeDef TxHeader;
FDCAN_RxHeaderTypeDef RxHeader;
uint8_t TxData_Node1_To_Node2[] = {0x10, 0x32, 0x54, 0x76, 0x98, 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
uint8_t RxData_From_Node2[12];
/* USER CODE END PV */
-FDCAN:
hfdcan1.Instance = FDCAN1;
hfdcan1.Init.FrameFormat = FDCAN_FRAME_FD_BRS;
hfdcan1.Init.Mode = FDCAN_MODE_NORMAL;
hfdcan1.Init.AutoRetransmission = ENABLE;
hfdcan1.Init.TransmitPause = DISABLE;
hfdcan1.Init.ProtocolException = DISABLE;
hfdcan1.Init.NominalPrescaler = 1;
hfdcan1.Init.NominalSyncJumpWidth = 13;
hfdcan1.Init.NominalTimeSeg1 = 86;
hfdcan1.Init.NominalTimeSeg2 = 13;
hfdcan1.Init.DataPrescaler = 2;
hfdcan1.Init.DataSyncJumpWidth = 12;
hfdcan1.Init.DataTimeSeg1 = 12;
hfdcan1.Init.DataTimeSeg2 = 12;
hfdcan1.Init.MessageRAMOffset = 0;
hfdcan1.Init.StdFiltersNbr = 1;
hfdcan1.Init.ExtFiltersNbr = 0;
hfdcan1.Init.RxFifo0ElmtsNbr = 1;
hfdcan1.Init.RxFifo0ElmtSize = FDCAN_DATA_BYTES_12;
hfdcan1.Init.RxFifo1ElmtsNbr = 0;
hfdcan1.Init.RxFifo1ElmtSize = FDCAN_DATA_BYTES_8;
hfdcan1.Init.RxBuffersNbr = 0;
hfdcan1.Init.RxBufferSize = FDCAN_DATA_BYTES_12;
hfdcan1.Init.TxEventsNbr = 0;
hfdcan1.Init.TxBuffersNbr = 1;
hfdcan1.Init.TxFifoQueueElmtsNbr = 0;
hfdcan1.Init.TxFifoQueueMode = FDCAN_TX_FIFO_OPERATION;
hfdcan1.Init.TxElmtSize = FDCAN_DATA_BYTES_12;
if (HAL_FDCAN_Init(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
-Filter:
FDCAN_FilterTypeDef sFilterConfig;
sFilterConfig.IdType = FDCAN_STANDARD_ID;
sFilterConfig.FilterIndex = 0;
#if 0
sFilterConfig.FilterType = FDCAN_FILTER_DUAL; // Ignore because FDCAN_FILTER_TO_RXBUFFER
#endif
sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXBUFFER;
sFilterConfig.FilterID1 = 0x2; // ID Node2
#if 0
sFilterConfig.FilterID2 = 0x0; // Ignore because FDCAN_FILTER_TO_RXBUFFER
#endif
sFilterConfig.RxBufferIndex = 0;
if(HAL_FDCAN_ConfigFilter(&hfdcan1, &sFilterConfig) != HAL_OK)
{
Error_Handler();
}
-Tx Header & send Message:
/* USER CODE BEGIN 2 */
/* Configure Tx buffer message */
TxHeader.Identifier = 0x1;
TxHeader.IdType = FDCAN_STANDARD_ID;
TxHeader.TxFrameType = FDCAN_DATA_FRAME;
TxHeader.DataLength = FDCAN_DLC_BYTES_12;
TxHeader.ErrorStateIndicator = FDCAN_ESI_ACTIVE;
TxHeader.BitRateSwitch = FDCAN_BRS_ON;
TxHeader.FDFormat = FDCAN_FD_CAN;
TxHeader.TxEventFifoControl = FDCAN_NO_TX_EVENTS;
TxHeader.MessageMarker = 0x0; // Ignore because FDCAN_NO_TX_EVENTS
if(HAL_FDCAN_AddMessageToTxBuffer(&hfdcan1, &TxHeader, TxData_Node1_To_Node2, FDCAN_TX_BUFFER0) != HAL_OK)
{
Error_Handler();
}
/* Start the FDCAN module */
if(HAL_FDCAN_Start(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
/* Send Tx buffer message */
if(HAL_FDCAN_EnableTxBufferRequest(&hfdcan1, FDCAN_TX_BUFFER0) != HAL_OK)
{
Error_Handler();
}
/* Polling for transmission complete on buffer index 0 */
while(HAL_FDCAN_IsTxBufferMessagePending(&hfdcan1, FDCAN_TX_BUFFER0) == 1);
/* Polling for reception complete on buffer index 0 */
while(HAL_FDCAN_IsRxBufferMessageAvailable(&hfdcan1, FDCAN_RX_BUFFER0) == 0);
/* Retrieve message from Rx buffer 0. Rec msg from Node 2 */
if(HAL_FDCAN_GetRxMessage(&hfdcan1, FDCAN_RX_BUFFER0, &RxHeader, RxData_From_Node2) != HAL_OK)
{
Error_Handler();
}As for hardware, I am using FDCAN1 on both board, and also connected STLK as told from the instraction.
