Posted on March 16, 2016 at 20:35 Ok found solution.
From stm32f1xx_hal_can.c
*** Interrupt mode IO operation ***
===================================
[..]
(+) Start the CAN peripheral transmission using HAL_CAN_Transmit_IT()
(+) Start the CAN peripheral reception using HAL_CAN_Receive_IT()
(+)
Use HAL_CAN_IRQHandler() called under the used CAN Interrupt subroutine
(+) At CAN end of transmission HAL_CAN_TxCpltCallback() function is executed and user can
add his own code by customization of function pointer HAL_CAN_TxCpltCallback
(+) In case of CAN Error, HAL_CAN_ErrorCallback() function is executed and user can
add his own code by customization of function pointer HAL_CAN_ErrorCallback
If I change my subroutine in main function to look like this:
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration----------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_CAN_Init();
/* USER CODE BEGIN 2 */
/* struct ID to repetitive asks to ECU */
uint8_t PIDcnt=0;
/*##-2- Start the Reception process and enable reception interrupt #########*/
if (HAL_CAN_Receive_IT(&hcan, CAN_FIFO0) != HAL_OK)
{
/* Reception Error */
Error_Handler();
}
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* Fill frame to ask ECU for basic data */
OBD_FillFrame(PIDcnt);
/* cycle PID id */
if(PIDcnt<4)
{
PIDcnt++;
}
else
{
PIDcnt=0;
}
HAL_CAN_Transmit(&hcan, 10);
HAL_Delay(10);
HAL_CAN_IRQHandler(&hcan);
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
It is working.
