Solved
interrupt on can bus with STM32f446
Hi everybody,
I'm trying to set up a communication with a can bus.
I'm using a STM32F446. I use PB12 & PB13 (CAN2). I can see RX frames on PB12.
I'd like to read frames that I received by using interrupts.
I've found this example : https://github.com/STMicroelectronics/STM32CubeL4/blob/master/Projects/STM32L476G-EVAL/Examples/CAN/CAN_Networking/Src/main.c
But, I have put a breakpoint on the interrupt, but it never goes in.
static void MX_CAN2_Init(void)
{
/* USER CODE BEGIN CAN2_Init 0 */
CAN_FilterTypeDef sFilterConfig2;
/* USER CODE END CAN2_Init 0 */
/* USER CODE BEGIN CAN2_Init 1 */
/* USER CODE END CAN2_Init 1 */
hcan2.Instance = CAN2;
hcan2.Init.Prescaler = 12;
hcan2.Init.Mode = CAN_MODE_NORMAL;
hcan2.Init.SyncJumpWidth = CAN_SJW_1TQ;
hcan2.Init.TimeSeg1 = CAN_BS1_8TQ;
hcan2.Init.TimeSeg2 = CAN_BS2_6TQ;
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 CAN2_Init 2 */
/*##-2- Configure the CAN Filter ###########################################*/
sFilterConfig2.FilterBank = 0;
sFilterConfig2.FilterMode = CAN_FILTERMODE_IDMASK;
sFilterConfig2.FilterScale = CAN_FILTERSCALE_32BIT;
sFilterConfig2.FilterIdHigh = 0x0000;
sFilterConfig2.FilterIdLow = 0x0000;
sFilterConfig2.FilterMaskIdHigh = 0x0000;
sFilterConfig2.FilterMaskIdLow = 0x0000;
sFilterConfig2.FilterFIFOAssignment = CAN_RX_FIFO0;
sFilterConfig2.FilterActivation = ENABLE;
sFilterConfig2.SlaveStartFilterBank = 14;
if (HAL_CAN_ConfigFilter(&hcan2, &sFilterConfig2) != HAL_OK)
{
/* Filter configuration Error */
Error_Handler();
}
/*##-3- Start the CAN peripheral ###########################################*/
if (HAL_CAN_Start(&hcan2) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/*##-4- Activate CAN RX notification #######################################*/
if (HAL_CAN_ActivateNotification(&hcan2, CAN_IT_RX_FIFO0_MSG_PENDING) != HAL_OK)
{
/* Notification Error */
Error_Handler();
}
/* USER CODE END CAN2_Init 2 */
/**
* @brief Rx Fifo 0 message pending callback
* @PAram hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval None
*/
void HAL_CAN_RxFifo0MsgPendingCallback(CAN_HandleTypeDef *hcan2)
{
/* Get RX message */
if (HAL_CAN_GetRxMessage(hcan2, CAN_RX_FIFO0, &RxHeader, RxData) != HAL_OK)
{
/* Reception Error */
Error_Handler();
}
}/**
* @brief This function handles CAN2 RX0 interrupt.
*/
void CAN2_RX0_IRQHandler(void)
{
/* USER CODE BEGIN CAN2_RX0_IRQn 0 */
/* USER CODE END CAN2_RX0_IRQn 0 */
HAL_CAN_IRQHandler(&hcan2);
/* USER CODE BEGIN CAN2_RX0_IRQn 1 */
/* USER CODE END CAN2_RX0_IRQn 1 */
}
If you have any suggestions, I'll be very happy.
Thank you.