基于 STM32CubeMX 添加 RT-Thread 操作系统组件(十七）- CPU 利用率统计

概述 

       本篇只要介绍这么使用STM32CubeMx工具添加RT-Thread操作系统组件，码代码的IDE是keil。介绍单线程SRAM静态内存使用。如果还不知道，这么使用STM32CubeMx工具添加RT-Thread操作系统组件，请移步到《基于 STM32CubeMX 添加 RT-Thread 操作系统组件(一）- 详细介绍操作步骤》文章阅读。好了，喝杯茶先^_^，继续前行。上一篇介绍关于《双向链表》
在实现这个功能之前，先去RT-Thread的源码仓库中获取，该文件在 rtthread--master\examples\kernel 路径下，名字叫cpuusage.c。

链接如下：
github
码云

一、STM32CubeMx配置

CubeMx参照上一篇文章介绍来配置即可，这里就不再做讲解了。

二、KEIL IDE

1. 在keil 工程项目视图，Application/User文件夹，打开下载好源码，找到cpuusage.c文件，添加到工程中来，如下代码：

   #include 
   #include 
   #include "cpuusage.h"
   
   #define CPU_USAGE_CALC_TICK    1000
   #define CPU_USAGE_LOOP        100
   
   static rt_uint8_t  cpu_usage_major = 0, cpu_usage_minor= 0;
   static rt_uint32_t total_count = 0;
   
   static void cpu_usage_idle_hook()
   {
       rt_tick_t tick;
       rt_uint32_t count;
       volatile rt_uint32_t loop;
   
       if (total_count == 0)
       {
           /* get total count */
           rt_enter_critical();
           tick = rt_tick_get();
           while(rt_tick_get() - tick < CPU_USAGE_CALC_TICK)
           {
               total_count ++;
               loop = 0;
               while (loop < CPU_USAGE_LOOP) loop ++;
           }
           rt_exit_critical();
       }
   
       count = 0;
       /* get CPU usage */
       tick = rt_tick_get();
       while (rt_tick_get() - tick < CPU_USAGE_CALC_TICK)
       {
           count ++;
           loop  = 0;
           while (loop < CPU_USAGE_LOOP) loop ++;
       }
   
       /* calculate major and minor */
       if (count < total_count)
       {
           count = total_count - count;
           cpu_usage_major = (count * 100) / total_count;
           cpu_usage_minor = ((count * 100) % total_count) * 100 / total_count;
       }
       else
       {
           total_count = count;
   
           /* no CPU usage */
           cpu_usage_major = 0;
           cpu_usage_minor = 0;
       }
   }
   
   void cpu_usage_get(rt_uint8_t *major, rt_uint8_t *minor)
   {
       RT_ASSERT(major != RT_NULL);
       RT_ASSERT(minor != RT_NULL);
   
       *major = cpu_usage_major;
       *minor = cpu_usage_minor;
   }
   
   void cpu_usage_init()
   {
       /* set idle thread hook */
       rt_thread_idle_sethook(cpu_usage_idle_hook);
   }
   

   
   
   
2. 在Application/User文件夹，新建cpuusage.h文件，并添加如下代码：

   #ifndef __CPUUSAGE_H__
   #define __CPUUSAGE_H__
   #include 
   #include 
   
   
   /* 获取 cpu 利用率 */
   void cpu_usage_init(void);
   void cpu_usage_get(rt_uint8_t *major, rt_uint8_t *minor);
   
   
   #endif
   
   

   
   
   
3. 在Application/User文件夹，新建app_rt_thread.c文件，并添加如下代码：

   #include "rtthread.h"
   #include "main.h"
   #include "stdio.h"
   #include 
   #include "cpuusage.h"
   
   
   
   /* 定义线程控制块 */
   static rt_thread_t led1_thread = RT_NULL;
   static rt_thread_t get_cpu_use_thread = RT_NULL;
   
   
   /* 函数声明 */
   static void led1_thread_entry(void* parameter);
   static void get_cpu_use_thread_entry(void* parameter);
   
   
   
   int MX_RT_Thread_Init(void)
   {
   	
   	cpu_usage_init();
   	
   	rt_kprintf("This is an RTT-CPU utilization statistics experiment\r\n");
   	led1_thread = /* 线程控制块指针 */
   	rt_thread_create( "led1", /* 线程名字 */
   				led1_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 (led1_thread != RT_NULL)
   		rt_thread_startup(led1_thread);
   	else
   		return -1;
   	
   	get_cpu_use_thread = /* 线程控制块指针 */
   	rt_thread_create( "get_cpu_use", /* 线程名字 */
   				get_cpu_use_thread_entry, /* 线程入口函数 */
   				RT_NULL, /* 线程入口函数参数 */
   				512, /* 线程栈大小 */
   				5, /* 线程的优先级 */
   				20); /* 线程时间片 */
   	if (get_cpu_use_thread != RT_NULL)
   		rt_thread_startup(get_cpu_use_thread);
   	else
   		return -1;
   }
   
   /*
   ************************************************************
   * 线程定义
   *********************************************************
   */
   static void led1_thread_entry(void* parameter)
   {
   	rt_uint16_t i;
   	while (1) {
   		HAL_GPIO_TogglePin(LED1_GPIO_Port, LED1_Pin);
   		/* 模拟占用 CPU 资源，修改数值作为模拟测试 */
   		for (i = 0; i < 10000; i++);
   		
   		rt_thread_delay(500); /* 延时 5 个 tick */
   		rt_kprintf("CPU utilization \r\n");
   	}
   }
   
   static void get_cpu_use_thread_entry(void* parameter)
   {
   	rt_uint8_t major,minor;
   	while (1) {
   		/* 获取 CPU 利用率数据 */
   		cpu_usage_get(&major,&minor);
   		/* 打印 CPU 利用率 */
   		rt_kprintf("CPU utilization = %d.%d%\r\n",major,minor);
   		rt_thread_delay(1000); /* 延时 1000 个 tick */
   	}
   }
   
   
   
   

4. 在main.c文件添加如下代码：

   /* USER CODE END Header */
   
   /* Includes ------------------------------------------------------------------*/
   #include "main.h"
   #include "usart.h"
   #include "gpio.h"
   
   /* Private includes ----------------------------------------------------------*/
   /* USER CODE BEGIN Includes */
   
   /* USER CODE END Includes */
   
   /* Private typedef -----------------------------------------------------------*/
   /* USER CODE BEGIN PTD */
   extern int MX_RT_Thread_Init(void);
   /* USER CODE END PTD */
   
   /* Private define ------------------------------------------------------------*/
   /* USER CODE BEGIN PD */
   /* USER CODE END PD */
   
   /* Private macro -------------------------------------------------------------*/
   /* USER CODE BEGIN PM */
   
   /* USER CODE END PM */
   
   /* Private variables ---------------------------------------------------------*/
   
   /* USER CODE BEGIN PV */
   
   /* USER CODE END PV */
   
   /* Private function prototypes -----------------------------------------------*/
   void SystemClock_Config(void);
   /* USER CODE BEGIN PFP */
   
   /* 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_USART1_UART_Init();
     /* USER CODE BEGIN 2 */
     MX_RT_Thread_Init();
     /* USER CODE END 2 */
   
     /* Infinite loop */
     /* USER CODE BEGIN WHILE */
     while (1)
     {
       /* USER CODE END WHILE */
   
       /* USER CODE BEGIN 3 */
     }
     /* USER CODE END 3 */
   }

    

5. 自定义rt_hw_console_output()函数，在kservice.c文件添加中（重映射串口控制台到 rt_kprintf 函数）代码：

   #include "usart.h"
   .
   .
   .
   
   RT_WEAK void rt_hw_console_output(const char *str)
   {
       /* empty console output */
   	/* 进入临界段 */
   	rt_enter_critical();
   	/* 直到字符串结束 */
   	while (*str!='\0') {
   	/* 换行 */
   	if (*str=='\n') {
   		HAL_UART_Transmit(&huart1,(uint8_t *)'\r',1,1000);
   	}
   		HAL_UART_Transmit(&huart1,(uint8_t *)(str++),1,1000);
   	}
   	/* 退出临界段 */
   	rt_exit_critical();
   }

   

6. 运行结果
       
   
   源码：git