Solved
CAN-Bus no callback/received frame; FDCAN STM32G473
I'm trying to attempt CAN on a STM32G473 MCU. While transmission seems to be fine, I'm not receiving any data back. The receive call back function is not triggering.
Following is my setup:
Below is the TxHeader and RxHeader initialization along with the call back function. I have a breakpoint in the call-back function which never gets triggered.
FDCAN_TxHeaderTypeDef TxHeader;
FDCAN_RxHeaderTypeDef RxHeader;
//uint32_t TxMailbox;
uint8_t TxData[12];
uint8_t RxData[12];
int indx = 0;
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 */
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_13, 1);
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();
}
}
}This is the TxHeader setup and FDCAN start :
/* USER CODE BEGIN 2 */
if(HAL_FDCAN_Start(&hfdcan1)!= HAL_OK)
{
Error_Handler();
}
if (HAL_FDCAN_ActivateNotification(&hfdcan1, FDCAN_IT_RX_FIFO0_NEW_MESSAGE, 0) != HAL_OK)
{
/* Notification Error */
Error_Handler();
}
// HAL_FDCAN_GetRxFifoFillLevel
TxHeader.Identifier = 0x11;
TxHeader.IdType = FDCAN_STANDARD_ID;
TxHeader.TxFrameType = FDCAN_DATA_FRAME;
TxHeader.DataLength = FDCAN_DLC_BYTES_12;
TxHeader.ErrorStateIndicator = FDCAN_ESI_ACTIVE;
TxHeader.BitRateSwitch = FDCAN_BRS_OFF;
TxHeader.FDFormat = FDCAN_FD_CAN;
TxHeader.TxEventFifoControl = FDCAN_NO_TX_EVENTS;
TxHeader.MessageMarker = 0;
/* USER CODE END 2 */The data that is transmitted ever second, (part of the while loop):
for (int i=0; i <12; i++)
{
TxData[i] = indx++;
}
if (HAL_FDCAN_AddMessageToTxFifoQ(&hfdcan1, &TxHeader, TxData)!= HAL_OK)
{
Error_Handler();
}
// HAL_GPIO_WritePin(GPIOB, GPIO_PIN_13, 0);
HAL_Delay (1000);My MX_FDCAN_Init() function :
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_DIV1;
hfdcan1.Init.FrameFormat = FDCAN_FRAME_CLASSIC;
hfdcan1.Init.Mode = FDCAN_MODE_NORMAL;
hfdcan1.Init.AutoRetransmission = DISABLE;
hfdcan1.Init.TransmitPause = DISABLE;
hfdcan1.Init.ProtocolException = DISABLE;
hfdcan1.Init.NominalPrescaler = 2;
hfdcan1.Init.NominalSyncJumpWidth = 16;
hfdcan1.Init.NominalTimeSeg1 = 130;
hfdcan1.Init.NominalTimeSeg2 = 19;
hfdcan1.Init.DataPrescaler = 4;
hfdcan1.Init.DataSyncJumpWidth = 8;
hfdcan1.Init.DataTimeSeg1 = 11;
hfdcan1.Init.DataTimeSeg2 = 8;
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;
sFilterConfig.IdType = FDCAN_STANDARD_ID;
sFilterConfig.FilterIndex = 0;
sFilterConfig.FilterType = FDCAN_FILTER_MASK;
sFilterConfig.FilterConfig = FDCAN_FILTER_TO_RXFIFO0;
sFilterConfig.FilterID1 = 0x11;
sFilterConfig.FilterID2 = 0x11;
// sFilterConfig.RxBufferIndex = 0;
if (HAL_FDCAN_ConfigFilter(&hfdcan1, &sFilterConfig) != HAL_OK)
{
/* Filter configuration Error */
Error_Handler();
}
/* USER CODE END FDCAN1_Init 2 */
}Oscilloscope reading on the CANH CANL lines
I have gone through posts (Link1, Link 2) who had similar issues, and I'm not facing that issue. My Std Filters Nbr=1 and Interrupt is enabled.
I'm not sure what I'm missing. Any help is appreciated.