Posted on September 03, 2016 at 13:14Hi every body
i checked my code again. I use STM32 CUBE MX for generate code and KEIL for compile code and i configure CAN parameter by HAL driver. if you want to receive the message in Both FIFOs(0,1) you should type
HAL_CAN_Receive_IT(&hcan,CAN_FIFO0);
HAL_CAN_Receive_IT(&hcan,CAN_FIFO1);
in your code.
then when you configure filters you can define that which message pass from which filter and receive by which FIFO.for example :
sFilterConfig.FilterNumber = 0;
sFilterConfig.FilterMode = CAN_FILTERMODE_IDMASK;
sFilterConfig.FilterScale = CAN_FILTERSCALE_16BIT;
sFilterConfig.FilterIdHigh = 0x0200;
sFilterConfig.FilterIdLow = 0x220;
sFilterConfig.FilterMaskIdHigh = 0xFFFF;
sFilterConfig.FilterMaskIdLow = 0xFFFF;
sFilterConfig.FilterFIFOAssignment = CAN_FIFO0; // message can receive in FIFO0
sFilterConfig.FilterActivation = ENABLE;
sFilterConfig.FilterNumber = 1;
sFilterConfig.FilterMode = CAN_FILTERMODE_IDMASK;
sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;
sFilterConfig.FilterIdHigh = 0x250;//
sFilterConfig.FilterIdLow = 0x00;
sFilterConfig.FilterMaskIdHigh = 0xFFFF;
sFilterConfig.FilterMaskIdLow = 0x0000;
sFilterConfig.FilterFIFOAssignment = CAN_FIFO1; message can receive in FIFO1
sFilterConfig.FilterActivation = ENABLE;
in this case you can receive messages in FIFO0 and FIFO1.
but this is very important that both FIFO(0,1) interrupt should be enable. you can add this line to end of
HAL_StatusTypeDef HAL_CAN_Receive_IT(CAN_HandleTypeDef* hcan, uint8_t FIFONumber)
function like as this line:
// if(FIFONumber == CAN_FIFO0)
// {
// /* Enable FIFO 0 message pending Interrupt */
// __HAL_CAN_ENABLE_IT(hcan, CAN_IT_FMP0);
// }
// else
// {
// /* Enable FIFO 1 message pending Interrupt */
// __HAL_CAN_ENABLE_IT(hcan, CAN_IT_FMP1);
// }
// }
else
{
return HAL_BUSY;
}
/* Return function status */
__HAL_CAN_ENABLE_IT(hcan, CAN_IT_FMP0);// added by user
__HAL_CAN_ENABLE_IT(hcan, CAN_IT_FMP1);// added by user
return HAL_OK;
i hope that my post can help you.
