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Add error callback to recover from UART deadlock, use async UART

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transmit
This commit is contained in:
Erick
2026-06-24 17:26:37 +02:00
parent b55bd9468f
commit 27b7a2665c
1 changed files with 27 additions and 13 deletions
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Core/Src/cansend.c
+27 -13
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@@ -52,11 +52,14 @@ void uart_printf(const char *fmt, ...)
{
if (osSemaphoreAcquire(xUARTDMASemaphore, osWaitForever) == osOK)
{
if (HAL_UART_Transmit_DMA(&huart1, (uint8_t*)buf, len) != HAL_OK) osSemaphoreRelease(xUARTDMASemaphore);
else osSemaphoreAcquire(xUARTDMASemaphore, osWaitForever);
HAL_UART_Transmit(&huart1, (uint8_t*)buf, len, HAL_MAX_DELAY);
osSemaphoreRelease(xUARTDMASemaphore);
}
}
else HAL_UART_Transmit(&huart1, (uint8_t*)buf, len, HAL_MAX_DELAY);
else
{
HAL_UART_Transmit(&huart1, (uint8_t*)buf, len, HAL_MAX_DELAY);
}
}
}
/* END uart_printf */
@@ -128,7 +131,19 @@ void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
}
/* END HAL_UART_TxCpltCallback */
/* BEGIN vUARTLoggerListen */
/* BEGIN HAL_UART_ErrorCallback */
/**
* @brief Safely release UART semaphore inside ISR and yield task if possible.
* @param argument: UART handle
* @retval None
*/
void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
{
if (huart->Instance == USART1) osSemaphoreRelease(xUARTDMASemaphore);
}
/* END HAL_UART_ErrorCallback */
/* BEGIN vUARTLogger */
/**
* @brief Send CAN bus traffic saved in FIFO buffer to USART1
* @param argument: Not used
@@ -155,13 +170,10 @@ void vUARTLogger(void *argument)
#ifdef DEBUG_DUMMY_FRAME
uint32_t queue_timeout = 1000U;
#else
uint32_t queue_timeout = osWaitForever;
#endif
#ifdef DEBUG_DUMMY_FRAME
osMessageQueuePut(xUARTQueue, &dummy_frame, 0U, 0U);
osDelay(1000);
#else
uint32_t queue_timeout = osWaitForever;
#endif
if (osMessageQueueGet(xUARTQueue, &message, NULL, queue_timeout) == osOK)
@@ -170,12 +182,14 @@ void vUARTLogger(void *argument)
{
int len = format_can_message(tx_buffer, message.source, &message);
if (HAL_UART_Transmit_DMA(&huart1, (uint8_t*)tx_buffer, len) != HAL_OK) Error_Handler();
else DEBUG_PRINT("[E] HAL error, CAN frame NOT sent!\r\n");
osSemaphoreRelease(xUARTDMASemaphore);
if (HAL_UART_Transmit_DMA(&huart1, (uint8_t*)tx_buffer, len) != HAL_OK)
{
osSemaphoreRelease(xUARTDMASemaphore);
DEBUG_PRINT("[E] HAL error, CAN frame NOT sent!\r\n");
}
}
else DEBUG_PRINT("[E] Semaphore timeout! UART might be stuck in BUSY state.\r\n");
}
}
}
/* END vUARTLoggerListen */
/* END vUARTLogger */