STM32CubeIDE+FreeRTOS消息队列实验

新建工程RTOS_Message，配置如下：

Ctrl + S生成代码

修改代码，

1，在main.h中添加

//添加include
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "stdio.h"
/* USER CODE END Includes */

2，在main.c中添加

//添加_write函数重定义
/* USER CODE BEGIN PFP */
int _write(int file , char *ptr,int len)
{
    int i = 0;
    for(i = 0;i<len;i++)
        ITM_SendChar((*ptr++));
    return len;
}
/* USER CODE END PFP */
...
...
...
/* USER CODE BEGIN 2 */
printf("starting...\n");
/* USER CODE END 2 */

3，在main.c中修改3个任务入口函数的内容

/* USER CODE BEGIN Header_StartDefaultTask */
/**
  * @brief  Function implementing the defaultTask thread.
  * @param  argument: Not used 
  * @retval None
  */
/* USER CODE END Header_StartDefaultTask */
void StartDefaultTask(void const * argument)
{
  /* USER CODE BEGIN 5 */
    int timeCount = 0;
  /* Infinite loop */
  for(;;)
  {
    printf("DefaultTask----time   %d\n",timeCount++);
    osDelay(1000);
  }
  /* USER CODE END 5 */ 
}

/* USER CODE BEGIN Header_StartSendTask */
/**
* @brief Function implementing the sendTask thread.
* @param argument: Not used
* @retval None
*/
/* USER CODE END Header_StartSendTask */
void StartSendTask(void const * argument)
{
  /* USER CODE BEGIN StartSendTask */
  /* Infinite loop */
  for(;;)
  {
    osDelay(2000);//等待2秒
    osMessagePut(myQueue01Handle, 1, 0);//发送消息1
    osDelay(3000);//等待3秒
    osMessagePut(myQueue01Handle, 2, 0);//发送消息2
  }
  /* USER CODE END StartSendTask */
}

/* USER CODE BEGIN Header_StartReceiveTask */
/**
* @brief Function implementing the receiveTask thread.
* @param argument: Not used
* @retval None
*/
/* USER CODE END Header_StartReceiveTask */
void StartReceiveTask(void const * argument)
{
  /* USER CODE BEGIN StartReceiveTask */
    osEvent theEvent;//声明一个事件
  /* Infinite loop */
  for(;;)
  {
　　　　//获取消息，如果没有消息就一直等待
      theEvent = osMessageGet(myQueue01Handle, osWaitForever);
      if(theEvent.status == osEventMessage)
      {
          printf("Receive message %ld\n",theEvent.value.v);
      }
  }
  /* USER CODE END StartReceiveTask */
}