Solved
FDCAN on STM32G0 Filter setup
Hello,
is there any simple example for (STM32G0B1CBT6) or similar where I can simply filter int genration for eg. only for 0x505 id in standart mode. I tested many samples and I believe that there must be some bug in IDE. This is
static void MX_FDCAN2_Init(void)
{
/* USER CODE BEGIN FDCAN2_Init 0 */
/* USER CODE END FDCAN2_Init 0 */
/* USER CODE BEGIN FDCAN2_Init 1 */
/* USER CODE END FDCAN2_Init 1 */
hfdcan2.Instance = FDCAN2;
hfdcan2.Init.ClockDivider = FDCAN_CLOCK_DIV1;
hfdcan2.Init.FrameFormat = FDCAN_FRAME_CLASSIC;
hfdcan2.Init.Mode = FDCAN_MODE_NORMAL;
hfdcan2.Init.AutoRetransmission = DISABLE;
hfdcan2.Init.TransmitPause = DISABLE;
hfdcan2.Init.ProtocolException = DISABLE;
hfdcan2.Init.NominalPrescaler = 16;
hfdcan2.Init.NominalSyncJumpWidth = 1;
hfdcan2.Init.NominalTimeSeg1 = 2;
hfdcan2.Init.NominalTimeSeg2 = 2;
hfdcan2.Init.DataPrescaler = 1;
hfdcan2.Init.DataSyncJumpWidth = 1;
hfdcan2.Init.DataTimeSeg1 = 1;
hfdcan2.Init.DataTimeSeg2 = 1;
hfdcan2.Init.StdFiltersNbr = 0;
hfdcan2.Init.ExtFiltersNbr = 0;
hfdcan2.Init.TxFifoQueueMode = FDCAN_TX_FIFO_OPERATION;
if (HAL_FDCAN_Init(&hfdcan2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN FDCAN2_Init 2 */
/* USER CODE END FDCAN2_Init 2 */
} // CAN initialization
FDCAN_FilterTypeDef sFilterConfig;
/* Nastavení počtu filtrů pro standardní ID */
hfdcan1.Init.StdFiltersNbr = 1;
hfdcan1.Init.ExtFiltersNbr = 0;
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 = 0x505; // filter
sFilterConfig.FilterID2 = 0x1FF; // mask
if (HAL_FDCAN_ConfigFilter(&hfdcan1, &sFilterConfig) != HAL_OK)
{
Error_Handler();
}
if (HAL_FDCAN_ConfigGlobalFilter(&hfdcan1,
FDCAN_REJECT,
FDCAN_REJECT,
FDCAN_REJECT_REMOTE,
FDCAN_REJECT_REMOTE) != HAL_OK)
{
Error_Handler();
}
/* Spuštění FDCAN modulu */
if (HAL_FDCAN_Start(&hfdcan1) != HAL_OK)
{
Error_Handler();
}
/* Aktivace přerušení pro FIFO 0 nové zprávy */
if (HAL_FDCAN_ActivateNotification(&hfdcan1, FDCAN_IT_RX_FIFO0_NEW_MESSAGE, 0) != HAL_OK)
{
Error_Handler();
}
// CAN initialization END
I have played and tried many changes in sFilterConfig.FilterID2 = 0x1FF; // mask 0x505 and other items. If I comment or delete HAL_FDCAN_ConfigGlobalFilter then any ID generates interrupt data comes from all id correctly but it does not filter for 0x505. if using HAL_FDCAN_ConfigGlobalFilter then it does not generate any int doesnt receive.
Instead of filter Iam using this method which is not very nice but working for now
void HAL_FDCAN_RxFifo0Callback(FDCAN_HandleTypeDef *hfdcan, uint32_t RxFifo0ITs)
{
FDCAN_RxHeaderTypeDef FDCANRxHeader;
if((RxFifo0ITs & FDCAN_IT_RX_FIFO0_NEW_MESSAGE) != RESET)
{
/* Retrieve Rx messages from RX FIFO0 */
if (HAL_FDCAN_GetRxMessage(hfdcan, FDCAN_RX_FIFO0, &FDCANRxHeader, canrx_obj.data) != HAL_OK)
{
Error_Handler();
}
canrx_obj.id =FDCANRxHeader.Identifier;
canrx_obj.len =FDCANRxHeader.DataLength;
/* Display LEDx */
if ((FDCANRxHeader.Identifier == 0x505) && (FDCANRxHeader.IdType == FDCAN_STANDARD_ID))
{
lt;
//LED_Display(RxData[0]);
//ubKeyNumber = RxData[0];
}
}
}
Where is the mistake whats wrong ?
Is it compiler bug somwhere?
