STM32L4R5 | FreeRTOS/CMSIS RTOS | Queue from UART ISR issue.

Forum|Forum|4 years ago
June 14, 2021
3 replies
1555 views

Hello Everyone,

I am currently working with a dev board based on STM32L4R5 using STM32CubeIDE , HAL libraries and FreeRTOS.

Project: UART2 initialized using the code generator:

Added __HAL_UART_ENABLE_IT() after initialization.

Along with this disabled the " Call HAL Handler " for the USART2 IRQAlso modified the IRQ priorityI have also initialized an queue that is used to send data from the UART IRQ and then received by a task/thread.

 /* Create the queue(s) */
 /* definition and creation of bluetoothDataQueue */
 osMessageQDef(bluetoothDataQueue, 50, uint8_t);
 bluetoothDataQueueHandle = osMessageCreate(osMessageQ(bluetoothDataQueue), NULL);

UART IRQ:

/**
 * @brief This function handles USART2 global interrupt.
 */
void USART2_IRQHandler(void)
{
 /* USER CODE BEGIN USART2_IRQn 0 */
	uint8_t console_rx_byte;
	if ( USART2->ISR & USART_ISR_RXNE_RXFNE )
	{
		console_rx_byte = USART2->RDR;
		osMessagePut( USART2_RxQueue, rxData, 0 );
	}
 
 /* USER CODE END USART2_IRQn 0 */
 /* USER CODE BEGIN USART2_IRQn 1 */
 
 /* USER CODE END USART2_IRQn 1 */
}

Issue:

When I comment out the line:

osMessagePut( USART2_RxQueue, rxData, 0 );

There is no issue encountered. But when the Line is added, the HAL_Init() function does not return.

From basic debugging the problem lies here in the HAL_Init()

 /* Use SysTick as time base source and configure 1ms tick (default clock after Reset is MSI) */
 if (HAL_InitTick(TICK_INT_PRIORITY) != HAL_OK)
 {
 status = HAL_ERROR;
 }
 else
 {
 /* Init the low level hardware */
 HAL_MspInit();
 }

Could someone please let me know If I am doing something wrong here.

Thank you.

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