FreeRTOS---互斥量在printf的使用

#ifdef __GNUC__
    #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
    #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif   

/*retargets the C library printf function to the USART*/
PUTCHAR_PROTOTYPE
{
    HAL_UART_Transmit(&huart1,(uint8_t*)&ch, 1, 0xFFFF);
    return ch;
}

 

void  Debug_Printf(char *format, ...)
{
    char  buf_str[128];
    va_list   v_args;


    va_start(v_args, format);
   (void)vsnprintf((char       *)&buf_str[0],
                   (size_t      ) sizeof(buf_str),
                   (char const *) format,
                                  v_args);
    va_end(v_args);

    /* 互斥信号量 */
    osMutexWait(Mutex_printfHandle,osWaitForever);
    printf("%s", buf_str);
    osMutexRelease(Mutex_printfHandle);
}

 /* definition and creation of vTask1 */
  osThreadDef(vTask1, Task1, osPriorityNormal, 0, 256);
  vTask1Handle = osThreadCreate(osThread(vTask1), NULL);

  /* definition and creation of vTask2 */
  osThreadDef(vTask2, Task2, osPriorityNormal, 0, 256);
  vTask2Handle = osThreadCreate(osThread(vTask2), NULL);

void Task1(void const * argument)
{

  /* USER CODE BEGIN Task1 */
  /* Infinite loop */
  for(;;)
  {
      Debug_Printf("Task1 is running,will be in the ready state!
");
      //printf("Task1 is running,will be in the ready state!
");
      osDelay(50);
  }
  /* USER CODE END Task1 */
}

/* Task2 function */
void Task2(void const * argument)
{
  /* USER CODE BEGIN Task2 */
  /* Infinite loop */
  for(;;)
  {
      Debug_Printf("Task2 is running!
");
      //printf("Task2 is running!
");
      osDelay(50);
  }
  /* USER CODE END Task2 */
}

直接使用printf输出不做临界保护输出的打印信息如下，有时出现输出打印信息不完整。

使用Debug_Printf打印信息如下：