Solved
FDCAN1 and FDCAN2 in STM32G0B1RCI6N
Hi,
I configured FDCAN1 in classic format and was able to send CAN messages to a recipient. However, if I want to try the same with FDCAN2 it does not work and the TX FIFO gets full and goes to the error handler.
However, If I change FDCAN_Config to use hfdcan2 instead of hfdcan1 as below
/**
* @brief Configures the FDCAN.
* @param None
* @retval None
*/
static void FDCAN_Config(void)
{
FDCAN_FilterTypeDef sFilterConfig;
/* Configure Rx filter */
sFilterConfig.IdType = FDCAN_STANDARD_ID;
sFilterConfig.FilterIndex = 0;
sFilterConfig.FilterType = FDCAN_FILTER_MASK;
sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXFIFO0;
sFilterConfig.FilterID1 = 0x321;
sFilterConfig.FilterID2 = 0x7FF;
if (HAL_FDCAN_ConfigFilter(&hfdcan2, &sFilterConfig) != HAL_OK)
{
Error_Handler();
}
/* Configure global filter:
Filter all remote frames with STD and EXT ID
Reject non matching frames with STD ID and EXT ID */
if (HAL_FDCAN_ConfigGlobalFilter(&hfdcan2, FDCAN_REJECT, FDCAN_REJECT, FDCAN_FILTER_REMOTE, FDCAN_FILTER_REMOTE) != HAL_OK)
{
Error_Handler();
}
/* Start the FDCAN module */
if (HAL_FDCAN_Start(&hfdcan2) != HAL_OK)
{
Error_Handler();
}
if (HAL_FDCAN_ActivateNotification(&hfdcan2, FDCAN_IT_RX_FIFO0_NEW_MESSAGE, 0) != HAL_OK)
{
Error_Handler();
}
/* Prepare Tx Header */
TxHeader.Identifier = 0x18FEC131;
TxHeader.IdType = FDCAN_EXTENDED_ID;
TxHeader.TxFrameType = FDCAN_DATA_FRAME;
TxHeader.DataLength = FDCAN_DLC_BYTES_8;
TxHeader.ErrorStateIndicator = FDCAN_ESI_ACTIVE;
TxHeader.BitRateSwitch = FDCAN_BRS_OFF;
TxHeader.FDFormat = FDCAN_CLASSIC_CAN;
TxHeader.TxEventFifoControl = FDCAN_NO_TX_EVENTS;
TxHeader.MessageMarker = 0;
}and try post to FIFO as follows, it goes to error state. Verified hardware and connections and found no issues (unless there is an issue under BGA which is unlikely)
/* Start the Transmission process */
if (HAL_FDCAN_AddMessageToTxFifoQ(&hfdcan2, &TxHeader, TxData) != HAL_OK)
{
/* Transmission request Error */
Error_Handler();
}BIt puzzled here. Thanks in advance.