I know that there a lot of care examples on the Internet, but I haven’t been able to get one to work with latest version of the HAL drivers. I’m attempting to use the loopback interface just to test on a single device at the moment. This is as far as I’ve got. But it crashes after the second time I press the button. The first time I do receive something. Do I have to reset the RX IT after each receive?
Thanks in advance.
pTxHeader.DLC=1; //give message size of 1 byte
pTxHeader.IDE=CAN_ID_STD; //set identifier to standard
pTxHeader.RTR=CAN_RTR_DATA; //set data type to remote transmission request?
pTxHeader.StdId=0x244; //define a standard identifier, used for message identification by filters (switch this for the other microcontroller)
//filter one (stack light blink)
sFilterConfig.FilterFIFOAssignment=CAN_FILTER_FIFO0; //set fifo assignment
// sFilterConfig.FilterIdHigh=0x245<<5; //the ID that the filter looks for (switch this for the other microcontroller)
sFilterConfig.FilterIdHigh=0;
sFilterConfig.FilterIdLow=0;
sFilterConfig.FilterMaskIdHigh=0;
sFilterConfig.FilterMaskIdLow=0;
sFilterConfig.FilterScale=CAN_FILTERSCALE_32BIT; //set filter scale
sFilterConfig.FilterActivation=ENABLE;
HAL_CAN_ConfigFilter(&hcan1, &sFilterConfig); //configure CAN filter
HAL_CAN_Start(&hcan1); //start CAN
HAL_CAN_ActivateNotification(&hcan1, CAN_IT_RX_FIFO0_MSG_PENDING); //enable interrupts
uint8_t myLEDVar = 1;
while(1)
{
if(HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_2))
{
HAL_CAN_AddTxMessage(&hcan1, &pTxHeader, myLEDVar, (uint32_t *)CAN_TX_MAILBOX0);
myLEDVar++;
}
vTaskDelay(100);
}
void CAN1_RX0_IRQHandler(void)
{
/* USER CODE BEGIN CAN1_RX0_IRQn 0 */
uint8_t result[1];
/* USER CODE END CAN1_RX0_IRQn 0 */
HAL_CAN_IRQHandler(&hcan1);
/* USER CODE BEGIN CAN1_RX0_IRQn 1 */
HAL_CAN_GetRxMessage(&hcan1, CAN_RX_FIFO0, &pRxHeader, &result);
Debug_Print_int(result);
/* USER CODE END CAN1_RX0_IRQn 1 */
}
