Hello,
I am trying to use FDCAN but for some reason interrupt is not triggering. Im using PEAK CAN to send and recieve messages. With osciloscope I can see the data being transfared to the STM board but the interrupt doesn't trigger. The speed I want is 125 kbit/s . I've done this with the CAN before but with FDCAN just cant seem to figure it out.
I have enabled FDCAN1 interupt 0 in the NVIC with priority 5.
Any idea what should I check? I have a feeling that it might be the filter settings that are wrong but Im just not sure.
I've tried sending data to 0x11 and 0x22 but nothing happens.
Filter and fdcan setup:
/* USER CODE END FDCAN1_Init 1 */
hfdcan1.Instance = FDCAN1;
hfdcan1.Init.ClockDivider = FDCAN_CLOCK_DIV1;
hfdcan1.Init.FrameFormat = FDCAN_FRAME_CLASSIC;
hfdcan1.Init.Mode = FDCAN_MODE_NORMAL;
hfdcan1.Init.AutoRetransmission = ENABLE;
hfdcan1.Init.TransmitPause = DISABLE;
hfdcan1.Init.ProtocolException = DISABLE;
hfdcan1.Init.NominalPrescaler = 12;
hfdcan1.Init.NominalSyncJumpWidth = 1;
hfdcan1.Init.NominalTimeSeg1 = 13;
hfdcan1.Init.NominalTimeSeg2 = 2;
hfdcan1.Init.DataPrescaler = 24;
hfdcan1.Init.DataSyncJumpWidth = 1;
hfdcan1.Init.DataTimeSeg1 = 13;
hfdcan1.Init.DataTimeSeg2 = 2;
hfdcan1.Init.StdFiltersNbr = 1;
hfdcan1.Init.ExtFiltersNbr = 1;
hfdcan1.Init.TxFifoQueueMode = FDCAN_TX_FIFO_OPERATION;
if (HAL_FDCAN_Init(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN FDCAN1_Init 2 */
//FDCAN1 FILTER
FDCAN_FilterTypeDef sFilterConfig;
sFilterConfig.IdType = FDCAN_STANDARD_ID; // Use standard IDs
sFilterConfig.FilterIndex = 0; // Filter index 0
sFilterConfig.FilterType = FDCAN_FILTER_DUAL; // Use range filter
sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXFIFO0; // Route accepted messages to RX FIFO 0
sFilterConfig.FilterID1 = 0x11; // Start of ID range
sFilterConfig.FilterID2 = 0x22; // End of ID range (standard ID max is 0x7FF)
if (HAL_FDCAN_ConfigFilter(&hfdcan1, &sFilterConfig) != HAL_OK)
{
/* Filter configuration Error */
Error_Handler();
}
FDCAN defines:
// Configure TX Header for FDCAN1
TxHeader1.Identifier = 0x11;
TxHeader1.IdType = FDCAN_STANDARD_ID;
TxHeader1.TxFrameType = FDCAN_DATA_FRAME;
TxHeader1.DataLength = FDCAN_DLC_BYTES_12;
TxHeader1.ErrorStateIndicator = FDCAN_ESI_ACTIVE;
TxHeader1.BitRateSwitch = FDCAN_BRS_OFF;
TxHeader1.FDFormat = FDCAN_FD_CAN;
TxHeader1.TxEventFifoControl = FDCAN_NO_TX_EVENTS;
TxHeader1.MessageMarker = 0;
Callback function:
// FDCAN1 Callback
void HAL_FDCAN_RxFifo0Callback(FDCAN_HandleTypeDef *hfdcan, uint32_t RxFifo0ITs)
{
if((RxFifo0ITs & FDCAN_IT_RX_FIFO0_NEW_MESSAGE) != RESET)
{
/* Retreive Rx messages from RX FIFO0 */
if (HAL_FDCAN_GetRxMessage(hfdcan, FDCAN_RX_FIFO0, &RxHeader1, RxData1) != HAL_OK)
{
/* Reception Error */
Error_Handler();
}
if (HAL_FDCAN_ActivateNotification(hfdcan, FDCAN_IT_RX_FIFO0_NEW_MESSAGE, 0) != HAL_OK)
{
/* Notification Error */
Error_Handler();
}
}
}
So I have connected the LoopBack. The interrupt works fine. In the Callback function I can see the TxBuffer changing but the RxBuffer doesn't update. When I meassure with osciloscope I get nothing on the Rx and Tx fdcan pins. I dont have the transciever connected to the Tx and Rx, should I have done it ?
Callback function:
void HAL_FDCAN_RxFifo0Callback(FDCAN_HandleTypeDef *hfdcan, uint32_t RxFifo0ITs)
{
if((RxFifo0ITs & FDCAN_IT_RX_FIFO0_NEW_MESSAGE) != RESET)
{
/* Retreive Rx messages from RX FIFO0 */
if (HAL_FDCAN_GetRxMessage(hfdcan, FDCAN_RX_FIFO0, &RxHeader, RxData) != HAL_OK)
{
/* Reception Error */
Error_Handler();
}
if (HAL_FDCAN_ActivateNotification(hfdcan, FDCAN_IT_RX_FIFO0_NEW_MESSAGE, 0) != HAL_OK)
{
/* Notification Error */
Error_Handler();
}
}
}
