I have implemented the following CAN Code
int main(void)
{
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_FDCAN1_Init();
FDCAN_Config();
HAL_FDCAN_Start(&hfdcan1);
}
static void MX_FDCAN1_Init(void)
{
hfdcan1.Instance = FDCAN1;
hfdcan1.Init.ClockDivider = FDCAN_CLOCK_DIV1;
hfdcan1.Init.FrameFormat = FDCAN_FRAME_CLASSIC;
hfdcan1.Init.Mode = FDCAN_MODE_NORMAL;
hfdcan1.Init.AutoRetransmission = DISABLE;
hfdcan1.Init.TransmitPause = ENABLE;
hfdcan1.Init.ProtocolException = DISABLE;
hfdcan1.Init.NominalPrescaler = 1;
hfdcan1.Init.NominalSyncJumpWidth = 16;
hfdcan1.Init.NominalTimeSeg1 = 15;
hfdcan1.Init.NominalTimeSeg2 = 16;
hfdcan1.Init.DataPrescaler = 1;
hfdcan1.Init.DataSyncJumpWidth = 4;
hfdcan1.Init.DataTimeSeg1 = 5;
hfdcan1.Init.DataTimeSeg2 = 4;
hfdcan1.Init.StdFiltersNbr = 0;
hfdcan1.Init.ExtFiltersNbr = 0;
hfdcan1.Init.TxFifoQueueMode = FDCAN_TX_FIFO_OPERATION;
if (HAL_FDCAN_Init(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
}
static void FDCAN_Config(void)
{
FDCAN_FilterTypeDef sFilterConfig;
/* Configure Rx filter */
sFilterConfig.IdType = FDCAN_EXTENDED_ID;
sFilterConfig.FilterIndex = 0;
sFilterConfig.FilterType = FDCAN_FILTER_MASK;
sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXFIFO0;
sFilterConfig.FilterID1 = 0x1806E5F4;
sFilterConfig.FilterID2 = 0x00;
if (HAL_FDCAN_ConfigFilter(&hfdcan1, &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(&hfdcan1, FDCAN_REJECT, FDCAN_REJECT, FDCAN_REJECT, FDCAN_REJECT) != HAL_OK)
{
Error_Handler();
}
/* Start the FDCAN module */
if (HAL_FDCAN_Start(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
if (HAL_FDCAN_ActivateNotification(&hfdcan1, FDCAN_IT_RX_FIFO0_NEW_MESSAGE, 0) != HAL_OK)
{
Error_Handler();
}
/* Prepare Tx Header */
TxHeader.Identifier = 0x18FF50E5;
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;
}
void HAL_FDCAN_RxFifo0Callback(FDCAN_HandleTypeDef *hfdcan, uint32_t RxFifo0ITs)
{
if((RxFifo0ITs & FDCAN_IT_RX_FIFO0_NEW_MESSAGE) != RESET)
{
/* Retrieve Rx messages from RX FIFO0 */
if (HAL_FDCAN_GetRxMessage(hfdcan, FDCAN_RX_FIFO0, &RxHeader, RxData) != HAL_OK)
{
Error_Handler();
}
}
}
Is the CAN code correct? The observation is when i send the message from the CAN tool the code breakpoint is hit the Receive Call back, but when the message is transmitted from the actual node, the receive interrupt does not happen. Why does it happen? Please advise. On the bus we have my node, other node and a CAN tool for viewing and transmitting messages.
