I am developing uart communication on STMicroelectronics NUCLEO-G474RE Board(stm32G474RETX MCU, 64pins) using MDK-v5, but run into a perplexing problem these several days, make no progress on it and have to reach out to seek some help. If anyone could give me a right way to go, it would be appreciated greatly.
Code is not complicated, I use cubeMX to initialize the code base with usart2 configured, and use two threads based on cmsis v2 api for receiving occassinally and transmiting periodically(in 2 seconds).
The auto-generated usart2 init code
static void MX_USART2_UART_Init(void)
{
/* USER CODE BEGIN USART2_Init 0 */
/* USER CODE END USART2_Init 0 */
/* USER CODE BEGIN USART2_Init 1 */
/* USER CODE END USART2_Init 1 */
huart2.Instance = USART2;
huart2.Init.BaudRate = 115200;
huart2.Init.WordLength = UART_WORDLENGTH_8B;
huart2.Init.StopBits = UART_STOPBITS_1;
huart2.Init.Parity = UART_PARITY_NONE;
huart2.Init.Mode = UART_MODE_TX_RX;
huart2.Init.HwFlowCtl = UART_HWCONTROL_RTS;
huart2.Init.OverSampling = UART_OVERSAMPLING_16;
huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart2.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart2) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart2, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart2, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_DisableFifoMode(&huart2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN USART2_Init 2 */
/* USER CODE END USART2_Init 2 */
}
Interrupt call back code
void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
{
printf("Interrupt error occured(0x%x)!!!\r\n", huart->ErrorCode);
}
void HAL_UART_RxCpltCallback(UART_HandleTypeDef* huart)
{
UNUSED(huart);
if(huart == &huart2 || huart == &huart3){
uint8_t aEnterLine[] = "\r\n";
//HAL_UART_Transmit(huart, aEnterLine, sizeof(aEnterLine), 0xFFFF);
//HAL_UART_Transmit(huart, gRxBuffer, 11, 0xFFFF);
//HAL_UART_Transmit(huart, aEnterLine, sizeof(aEnterLine), 0xFFFF);
//printf("%s\r\n", gRxBuffer);
if(g_cmdExecuting == 0)
osEventFlagsSet(evt_id, 0x00000001U);
}else if(huart == &huart1){
}else{
}
HAL_UART_Receive_IT(huart, (unsigned char*)gRxBuffer, 11);
}
int8_t app_usart_transmit(uint8_t* buf, uint8_t len)
{
return 0;
}
int8_t app_usart_init(UART_HandleTypeDef* huart)
{
if(huart == NULL)
return -1;
if(huart == &huart2 || huart == &huart3){
uint8_t aTxStartMessage[] = "\r\n****UART-Hyperterminal commmunication based on IT****"
"\r\nEnter 10 characters using keyboard: \r\n";
HAL_UART_Transmit(huart, aTxStartMessage, sizeof(aTxStartMessage), 0xFFFF);
}
clear_rx_buffer();
HAL_UART_Receive_IT(huart, (uint8_t*)gRxBuffer, 11);
return 0;
}
rx & tx worker code
extern osMutexId_t myMutex01Handle;
extern osEventFlagsId_t evt_id;
extern osEventFlagsId_t evt_id1;
osTimerId_t timer_id;
static osThreadId gTask1Handle;
static const osThreadAttr_t gTask1Attrbutes = {
.name = "Task1",
.priority = (osPriority_t) osPriorityAboveNormal,
.stack_size = 512
};
static osThreadId gTask2Handle;
static const osThreadAttr_t gTask2Attrbutes = {
.name = "Task2",
.priority = (osPriority_t) osPriorityNormal,
.stack_size = 512
};
uint8_t g_cmdExecuting = 0;
uint8_t g_SemExec = 0;
uint32_t timer_cnt;
void update_stat_timer(void* argument)
{
timer_cnt++;
//osMutexAcquire(myMutex01Handle, osWaitForever);
printf("update_stat_timer executes %u times, ====++++====++++\r\n", timer_cnt);
//osMutexRelease(myMutex01Handle);
}
void update_stat_task_run(void* argument)
{
uint32_t count;
for(;;){
osDelay(2000);
count++;
osMutexAcquire(myMutex01Handle, osWaitForever);
printf("update_stat_task_run executes %d times, ====++++====++++\r\n", count);
osMutexRelease(myMutex01Handle);
}
}
void exec_cmd_task_run(void* argument)
{
uint32_t flags;
for(;;){
flags = osEventFlagsWait(evt_id, 0x00000001U, osFlagsWaitAny, osWaitForever);
g_cmdExecuting = 1;
osMutexAcquire(myMutex01Handle, osWaitForever);
osDelay(1000);
printf("exec_cmd_task Print\r\n");
osMutexRelease(myMutex01Handle);
g_cmdExecuting = 0;
}
}
int8_t app_task_init()
{
osStatus_t status;
gTask1Handle = osThreadNew(exec_cmd_task_run, NULL, &gTask1Attrbutes);
gTask2Handle = osThreadNew(update_stat_task_run, NULL, &gTask2Attrbutes);
//uint32_t exec = 1;
//timer_id = osTimerNew(update_stat_timer, osTimerPeriodic, &exec, NULL);
//if(status != osOK){
//;
//}
//osTimerStart(timer_id, 2000U);
return 0;
}
My Question: It could receive and transmit msg at very begining, but after receiving three or four hundred times, it couldn't receive the msg anymore while the transmitting is ok, and I also use the timer api to replace the transmitting thread, the result is the same, it couldn't receive any msg after hundreds times. the testing result pic
