I am working with the STM32F072CB device on a custom PCB. Working from this STM32 example.
I just want to implement a basic loopback test. However i don't seem to receive any data.
HAL_CAN_Init() is called succesful
HAL_CAN_Start() is called succesful
HAL_CAN_ActivateNotification(&hcan, CAN_IT_RX_FIFO0_MSG_PENDING) is called successful and should call HAL_CAN_RxFifo0MsgPendingCallback() when any message are recieved.
I then transmit a basic message from HAL_CAN_AddTxMessage() of which I can see is complete from the HAL_CAN_TxMailbox0CompleteCallback().
But still no receive interrupt is generated.
static void MX_CAN_Init(void)
{
hcan.Instance = CAN;
hcan.Init.Prescaler = 8;
hcan.Init.Mode = CAN_MODE_SILENT_LOOPBACK;
hcan.Init.SyncJumpWidth = CAN_SJW_1TQ;
hcan.Init.TimeSeg1 = CAN_BS1_5TQ;
hcan.Init.TimeSeg2 = CAN_BS2_6TQ;
hcan.Init.TimeTriggeredMode = DISABLE;
hcan.Init.AutoBusOff = DISABLE;
hcan.Init.AutoWakeUp = DISABLE;
hcan.Init.AutoRetransmission = ENABLE;
hcan.Init.ReceiveFifoLocked = DISABLE;
hcan.Init.TransmitFifoPriority = DISABLE;
if (HAL_CAN_Init(&hcan) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN CAN_Init 2 */
if (HAL_CAN_Start(&hcan) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
if (HAL_CAN_ActivateNotification(&hcan, CAN_IT_RX_FIFO0_MSG_PENDING) != HAL_OK)
{
/* Notification Error */
Error_Handler();
}
/* USER CODE END CAN_Init 2 */
}
void HAL_CAN_RxFifo0MsgPendingCallback(CAN_HandleTypeDef *hcan) {
if (HAL_CAN_GetRxMessage(hcan, CAN_RX_FIFO0, &RxHeader, RxData) == HAL_OK)
CANprocess();
}
void CAN_TX_Echo_Test() {
TxData[0] = 0xbe;
TxData[1] = 0xef;
/* Start the Transmission process */
if (HAL_CAN_AddTxMessage(&hcan, &TxHeader, TxData, &TxMailbox) != HAL_OK) {
/* Transmission request Error */
Error_Handler();
}
}
