Solved
FDCAN2 Rx callback never called (STM32H750)
Hello,
On my project, I use FDCAN1 and FDCAN2. FDCAN1 is working perfectly fine.
On FDCAN2, I can transmit data successfully (with the CAN ID 0xBEEF), but when I want do receive data, the Rx callback is never called, nor the IRQ handler (the CAN ID filter is set to 0xDEAD).
CAN ID is configured as extended ID mode.
Here's my FDCAN2 init function:
static void MX_FDCAN2_Init(void)
{
/* 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_CLASSIC;
hfdcan2.Init.Mode = FDCAN_MODE_NORMAL;
hfdcan2.Init.AutoRetransmission = ENABLE;
hfdcan2.Init.TransmitPause = ENABLE;
hfdcan2.Init.ProtocolException = ENABLE;
hfdcan2.Init.NominalPrescaler = 32;
hfdcan2.Init.NominalSyncJumpWidth = 2;
hfdcan2.Init.NominalTimeSeg1 = 2;
hfdcan2.Init.NominalTimeSeg2 = 2;
hfdcan2.Init.DataPrescaler = 1;
hfdcan2.Init.DataSyncJumpWidth = 12;
hfdcan2.Init.DataTimeSeg1 = 12;
hfdcan2.Init.DataTimeSeg2 = 12;
hfdcan2.Init.MessageRAMOffset = 0;
hfdcan2.Init.StdFiltersNbr = 0;
hfdcan2.Init.ExtFiltersNbr = 1;
hfdcan2.Init.RxFifo0ElmtsNbr = 1;
hfdcan2.Init.RxFifo0ElmtSize = FDCAN_DATA_BYTES_8;
hfdcan2.Init.RxFifo1ElmtsNbr = 1;
hfdcan2.Init.RxFifo1ElmtSize = FDCAN_DATA_BYTES_8;
hfdcan2.Init.RxBuffersNbr = 1;
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 */
//Rx filter config
FDCAN_FilterTypeDef sFilterConfig;
sFilterConfig.IdType = FDCAN_EXTENDED_ID;
sFilterConfig.FilterIndex = 0;
sFilterConfig.FilterType = FDCAN_FILTER_RANGE;
sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXFIFO1;
sFilterConfig.FilterID1 = 0xDEAD;
sFilterConfig.FilterID2 = 0xDEAD;
//Tx header config
TxHeader2.Identifier = 0xBEEF;
TxHeader2.IdType = FDCAN_EXTENDED_ID;
TxHeader2.TxFrameType = FDCAN_DATA_FRAME;
TxHeader2.DataLength = FDCAN_DLC_BYTES_8;
TxHeader2.ErrorStateIndicator = FDCAN_ESI_ACTIVE;
TxHeader2.BitRateSwitch = FDCAN_BRS_OFF;
TxHeader2.FDFormat = FDCAN_CLASSIC_CAN;
TxHeader2.TxEventFifoControl = FDCAN_NO_TX_EVENTS;
TxHeader2.MessageMarker = 0;
//Config filter
if(HAL_FDCAN_ConfigFilter(&hfdcan2, &sFilterConfig) != HAL_OK)
{
Error_Handler();
}
//Config global filter
if(HAL_FDCAN_ConfigGlobalFilter(&hfdcan2, FDCAN_REJECT, FDCAN_REJECT, FDCAN_FILTER_REMOTE, FDCAN_FILTER_REMOTE) != HAL_OK)
{
Error_Handler();
}
//Start CAN
if(HAL_FDCAN_Start(&hfdcan2) != HAL_OK)
{
Error_Handler();
}
//Activate CAN notifications
if(HAL_FDCAN_ActivateNotification(&hfdcan2, FDCAN_IT_RX_FIFO1_NEW_MESSAGE, 0) != HAL_OK)
{
Error_Handler();
}
/* USER CODE END FDCAN2_Init 2 */
}Here's my Rx callback function that is never called :
//FDCAN Rx callback
void HAL_FDCAN_RxFifo1Callback(FDCAN_HandleTypeDef *hfdcan, uint32_t RxFifo0ITs)
{
//Retreive Rx messages from RX FIFO0
HAL_FDCAN_GetRxMessage(hfdcan, FDCAN_RX_FIFO1, &RxHeader2, (uint8_t*)CAN_RxDataBuffer2);
//Activate Rx notifications from RX FIFO0
HAL_FDCAN_ActivateNotification(hfdcan, FDCAN_IT_RX_FIFO1_NEW_MESSAGE, 0);
}Of course the FDCAN2 interrupt 0 is activated on CubeMX :
What's wrong?
Best regards