Good morning,
I'm using a CAN bus on my STM32F446RE. Right, now, the CAN communication is working with only one rx filter. I saw in datasheet that we can use up to 128 filters. I don't need so many filters, but I'm trying to configure a second filter. Unfortunately, when I do this, the MCU does not receive any message (although it compiles without error).
So my question is : how can I config two CAN filters with HAL library ?
Here is my code ( sFilterConfig2 is commented because it is the part that breaks my application) :
void Ifremer_MX_CAN_Init(void)
{
/* USER CODE BEGIN CAN_Init 0 */
/* USER CODE END CAN_Init 0 */
/* USER CODE BEGIN CAN_Init 1 */
/* USER CODE END CAN_Init 1 */
hcan2.Instance = CAN2;
hcan2.Init.Prescaler = 3;
hcan2.Init.Mode = CAN_MODE_NORMAL;
hcan2.Init.SyncJumpWidth = CAN_SJW_1TQ;
hcan2.Init.TimeSeg1 = CAN_BS1_11TQ;
hcan2.Init.TimeSeg2 = CAN_BS2_2TQ;
hcan2.Init.TimeTriggeredMode = DISABLE;
hcan2.Init.AutoBusOff = DISABLE;
hcan2.Init.AutoWakeUp = DISABLE;
hcan2.Init.AutoRetransmission = DISABLE;
hcan2.Init.ReceiveFifoLocked = DISABLE;
hcan2.Init.TransmitFifoPriority = DISABLE;
if (HAL_CAN_Init(&hcan2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN CAN_Init 2 */
/*##-2- Configure the CAN Filter ###########################################*/
CAN_FilterTypeDef sFilterConfig;
sFilterConfig.FilterIdHigh= (nodeID << 5);// ID 11-bit in top bits
sFilterConfig.FilterIdLow= 0;
sFilterConfig.FilterMaskIdHigh= 0b111111100000;// ID 11-bit in top bits,
sFilterConfig.FilterMaskIdLow= 0;
sFilterConfig.FilterFIFOAssignment = CAN_FILTER_FIFO0;
sFilterConfig.FilterBank= 0;//0
sFilterConfig.FilterMode= CAN_FILTERMODE_IDMASK;
sFilterConfig.FilterScale= CAN_FILTERSCALE_32BIT;
sFilterConfig.FilterActivation= ENABLE;
sFilterConfig.SlaveStartFilterBank = 0;//0
HAL_CAN_ConfigFilter(&hcan2, &sFilterConfig);
/* CAN_FilterTypeDef sFilterConfig2;
sFilterConfig2.FilterIdHigh= (nodeID << 5);// ID 11-bit in top bits
sFilterConfig2.FilterIdLow= 0;
sFilterConfig2.FilterMaskIdHigh= 0b111111100000;// ID 11-bit in top bits,, mask for comparison FFE0
sFilterConfig2.FilterMaskIdLow= 0;
sFilterConfig2.FilterFIFOAssignment = CAN_FILTER_FIFO1;
sFilterConfig2.FilterBank= 0;//0
sFilterConfig2.FilterMode= CAN_FILTERMODE_IDMASK;
sFilterConfig2.FilterScale= CAN_FILTERSCALE_32BIT;
sFilterConfig2.FilterActivation= ENABLE;
sFilterConfig2.SlaveStartFilterBank = 0;//0
HAL_CAN_ConfigFilter(&hcan2, &sFilterConfig2);*/
/* Start the FDCAN module */
if (HAL_CAN_Start(&hcan2) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
HAL_CAN_ActivateNotification(&hcan2, CAN_IT_RX_FIFO0_MSG_PENDING);
//HAL_CAN_ActivateNotification(&hcan2, CAN_IT_RX_FIFO1_MSG_PENDING);
/*##-5- Configure Transmission process #####################################*/
// Configure header (standard id)
TxHeader.StdId = address;
TxHeader.IDE = CAN_ID_STD;
TxHeader.RTR = CAN_RTR_DATA;
TxHeader.DLC = 8;
/* USER CODE END CAN_Init 2 */
}
Additionnal infos :
- I use STM32Cube IDE
- NUCLEO-F446 RE board
Thanks for reading?
Best regards,
Valentin
