RT-thread（8）RT-Thread的事件 两个线程通过事件协调（keil5 +cubeMX）

线程task2控制task1的运行

task2  优先级高，触发事件。 

task1  优先级低， 接收 事件

task1内部循环 顺序：   1、线程挂起             2、等待task2发出的事件，3、事件处理，

task2内部循环 顺序：   1、恢复task1线程，2、向task1发出事件信号

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2023 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "dma.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <rtthread.h>
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/*事件-代号*/
#define KEY1_EVENT (0x01 << 0)//设置事件掩码的位 0
#define KEY2_EVENT (0x01 << 1)//设置事件掩码的位 1
/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */
/* 定义信号量控制块 */
static rt_sem_t test_sem = RT_NULL;
/* RT-Thread 定义线程控制块指针 */
static rt_thread_t task1_thread = RT_NULL;
static rt_thread_t task2_thread = RT_NULL;
/* 定义事件控制块 (句柄) */
static rt_event_t test_event = RT_NULL;
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* RT-Thread 线程入口函数声明 */
static void task1_thread_entry(void* parameter);
static void task2_thread_entry(void* parameter);
/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_USART1_UART_Init();
  MX_USART4_UART_Init();
  /* USER CODE BEGIN 2 */
    /* 创建一个事件 */
    test_event = rt_event_create("test_event",/* 事件标志组名字 */
                                  RT_IPC_FLAG_PRIO); /* 事件模式 FIFO(0x00)*/
    if (test_event != RT_NULL)
                    rt_kprintf(" the event is created\r\n");

    /*创建线程控制块，并赋给一个该类型指针变量f*/
    task1_thread = /* 线程控制块指针 */
    rt_thread_create( "task1",          /* 线程名字 */
                                                                            task1_thread_entry, /* 线程入口函数 */
                                                                            RT_NULL, /* 线程入口函数参数 */
                                                                            512, /* 线程栈大小 */
                                                                            3, /* 线程的优先级 */
                                                                            20); /* 线程时间片 */
    /* 启动线程，开启调度 */
    if (task1_thread != RT_NULL)
             rt_thread_startup(task1_thread);
    else
             return -1;                                    
                                                                                                                                                    
    task2_thread = /* 线程控制块指针 */                                    
    rt_thread_create( "task2", /* 线程名字 */
                                                                            task2_thread_entry, /* 线程入口函数 */
                                                                            RT_NULL, /* 线程入口函数参数 */
                                                                            512, /* 线程栈大小 */
                                                                            3, /* 线程的优先级 */
                                                                            20); /* 线程时间片 */   
    /* 启动线程，开启调度 */
    if (task2_thread != RT_NULL)
             rt_thread_startup(task2_thread);
    else
             return -1;          
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage
  */
  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1);

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSIDiv = RCC_HSI_DIV1;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1;
  RCC_OscInitStruct.PLL.PLLN = 8;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */
static void task1_thread_entry(void* parameter)
{
    rt_uint32_t EventID;
        static rt_err_t uwRet = RT_EOK;
    while(1)
        {
                    uwRet = rt_thread_suspend(task1_thread);/* 挂起LED1 线程*/
                    if (RT_EOK == uwRet) {                          
                    rt_schedule();    
                    rt_kprintf("挂起task1线程成功！\n");
                    } 
                    else {
                    rt_kprintf("挂起task1线程失败！失败代码：0x%lx\n",uwRet);                            
                    }      
                    
                    rt_event_recv(test_event, /* 事件对象句柄 */
                                  KEY1_EVENT|KEY2_EVENT,/* 接收线程感兴趣的事件 */
                                  RT_EVENT_FLAG_AND|RT_EVENT_FLAG_CLEAR,/* 接收选项 */
                                  RT_WAITING_FOREVER,/* 指定超时事件, 一直等 */
                                  &EventID); /* 指向接收到的事件 */  
                
                 if (EventID == (KEY1_EVENT|KEY2_EVENT)) { /* 如果接收完成并且正确 */
                                 rt_kprintf(" 事件1和2都发生\r\n");
                     }                   
           //rt_thread_delay(RT_WAITING_FOREVER); /* 延时 500 个 tick, 让出CPU */            
        }
}
static void task2_thread_entry(void* parameter)
{
        static rt_uint32_t counter= 0;
          static rt_err_t uwRet = RT_EOK;
    while(1)
        {
            counter =counter+1;/*计数器*/
            counter =counter%21;/*计数置 0 或 1*/  
         if(counter == 0)    
                 {  
                      if(task1_thread->stat == RT_THREAD_SUSPEND){//判断为挂起线程
                            uwRet = rt_thread_resume(task1_thread);/* 恢复task1线程*/
                            if (RT_EOK == uwRet) {
                            rt_kprintf("恢复task1 线程成功！\n");
                            } else {
                            rt_kprintf("恢复task1 线程失败！失败代码：0x%lx\n",uwRet);
                        }        
                    }
                 }                        
         if(counter == 3)    
                 {
            rt_event_send(test_event,KEY1_EVENT); /* 发送一个事件 1 */
                 }
         if(counter == 4)              
            rt_event_send(test_event,KEY2_EVENT); /* 发送一个事件 2 */            
         
         rt_kprintf("task2 is running, counter = %d\r\n",counter);                                          
         rt_thread_delay(200); /* 延时 500 个 tick, 让出CPU */                  
        }
}


/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */