Posted by jyi on 2015-06-29 20:38

I’m using HAL functions for STM32F091CC.
When CAN Filter is disabled, all the messages are received,
When CAN Filter is setup and enabled, only the global addressed message is received.

It works fine for STMF103CB.

Here is the function to setup the CAN filter for F091CC.

HAL_StatusTypeDef MX_CAN_Config(void)
{
CAN_FilterConfTypeDef sFilterConfig;

/* Configure the CAN Filter 0 for FIFO 0 with node id=0x02 */
sFilterConfig.FilterNumber = 0;
sFilterConfig.FilterMode = CAN_FILTERMODE_IDMASK;
sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;
sFilterConfig.FilterIdHigh = (uint32_t)0x02 & 0x3F80;
sFilterConfig.FilterIdLow = 0;
sFilterConfig.FilterMaskIdHigh = 0x3F80;
sFilterConfig.FilterMaskIdLow = 0;
sFilterConfig.FilterFIFOAssignment = CAN_FIFO0;
sFilterConfig.FilterActivation = ENABLE;
sFilterConfig.BankNumber = 1;

if(HAL_CAN_ConfigFilter(&hcan, &sFilterConfig) != HAL_OK)
{
return HAL_ERROR;
}
/* Configure the CAN Filter 1 FIFO 0 for global id */
sFilterConfig.FilterNumber = 1;
sFilterConfig.FilterIdHigh = 0;
sFilterConfig.FilterFIFOAssignment = CAN_FIFO0;

if(HAL_CAN_ConfigFilter(&hcan, &sFilterConfig) != HAL_OK)
{
return HAL_ERROR;
}

// set buffer pointers
hcan.pTxMsg = &TxMessage;
hcan.pRxMsg = &RxMessage;
/* Configure Transmission process */
hcan.pTxMsg->RTR = CAN_RTR_DATA;
hcan.pTxMsg->IDE = CAN_ID_EXT;
hcan.pTxMsg->DLC = 0;
// enable can rx with interruptions
HAL_CAN_Receive_IT(&hcan, CAN_FIFO0);
HAL_CAN_Receive_IT(&hcan, CAN_FIFO1);

return HAL_OK;
}