high speed fdcan stm32g431
Hi, i'm dealing with fdcan and have problems with high speeds, 1Mbps works good, but 8Mbps (which works in loopback mode) doesn't, I tried with delay compensation, but didn't work, or maybe i used it wrong way?
static void MX_FDCAN1_Init(void)
{
/* USER CODE BEGIN FDCAN1_Init 0 */
/* USER CODE END FDCAN1_Init 0 */
/* USER CODE BEGIN FDCAN1_Init 1 */
/* USER CODE END FDCAN1_Init 1 */
hfdcan1.Instance = FDCAN1;
hfdcan1.Init.ClockDivider = FDCAN_CLOCK_DIV2;
hfdcan1.Init.FrameFormat = FDCAN_FRAME_FD_BRS;
hfdcan1.Init.Mode = FDCAN_MODE_EXTERNAL_LOOPBACK;
hfdcan1.Init.AutoRetransmission = ENABLE;
hfdcan1.Init.TransmitPause = DISABLE;
hfdcan1.Init.ProtocolException = ENABLE;
hfdcan1.Init.NominalPrescaler = 1;
hfdcan1.Init.NominalSyncJumpWidth = 1;
hfdcan1.Init.NominalTimeSeg1 = 3;
hfdcan1.Init.NominalTimeSeg2 = 3;
hfdcan1.Init.DataPrescaler = 1;
hfdcan1.Init.DataSyncJumpWidth = 3;
hfdcan1.Init.DataTimeSeg1 = 3;
hfdcan1.Init.DataTimeSeg2 = 3;
hfdcan1.Init.StdFiltersNbr = 1;
hfdcan1.Init.ExtFiltersNbr = 0;
hfdcan1.Init.TxFifoQueueMode = FDCAN_TX_FIFO_OPERATION;
if (HAL_FDCAN_Init(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN FDCAN1_Init 2 */
FDCAN_FilterTypeDef sFilterConfig;
// Configure the filter to accept all messages with Standard ID 0x321
sFilterConfig.IdType = FDCAN_STANDARD_ID;
sFilterConfig.FilterIndex = 0; // Use the first filter bank
sFilterConfig.FilterType = FDCAN_FILTER_MASK; // Specify the filter type
sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXFIFO0; // Store matching messages in RX FIFO 0
sFilterConfig.FilterID1 = 0x103; // filter
sFilterConfig.FilterID2 = 0x103; // mask
if (HAL_FDCAN_ConfigFilter(&hfdcan1, &sFilterConfig) != HAL_OK) {
// Handle error
}
HAL_FDCAN_ConfigGlobalFilter(&hfdcan1,
FDCAN_REJECT, // Reject non-matching Standard ID messages
FDCAN_REJECT, // Reject non-matching Extended ID messages
FDCAN_REJECT_REMOTE, // Reject remote frames with Standard ID
FDCAN_REJECT_REMOTE); // Reject remote frames with Extended ID
/* Configure and enable Tx Delay Compensation : TdcOffset = DataTimeSeg1*DataPrescaler */
HAL_FDCAN_ConfigTxDelayCompensation(&hfdcan1, 3, 0);
HAL_FDCAN_EnableTxDelayCompensation(&hfdcan1);
/* USER CODE END FDCAN1_Init 2 */
}
