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《邮箱》
内存管理包含两种:1、静态内存管理;2、动态内存管理。
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
#include "rtthread.h"
#include "main.h"
#include "stdio.h"
#if 0
//静态内存管理
/* 定义线程控制块 */
static rt_thread_t alloc_thread = RT_NULL;
static rt_thread_t free_thread = RT_NULL;
/* 定义内存池控制块 */
static rt_mp_t test_mp = RT_NULL;
/* 定义申请内存的指针 */
static rt_uint32_t *p_test = RT_NULL;
/* 变量声明 */
/* 相关宏定义 */
#define BLOCK_COUNT 20 //内存块数量
#define BLOCK_SIZE 3 //内存块大小
/* 函数声明 */
static void alloc_thread_entry(void* parameter);
static void free_thread_entry(void* parameter);
int MX_RT_Thread_Init(void)
{
rt_kprintf("This is an RTT static memory management experiment!\n");
rt_kprintf("Creating a memory pool...........\n");
/* 创建一个静态内存池 */
test_mp = rt_mp_create("test_mp",
BLOCK_COUNT,
BLOCK_SIZE);
if (test_mp != RT_NULL)
rt_kprintf("Static memory pool created successfully!\n\n");
/* 创建一个线程 */
alloc_thread = /* 线程控制块指针 */
rt_thread_create( "alloc", /* 线程名字 */
alloc_thread_entry, /* 线程入口函数 */
RT_NULL, /* 线程入口函数参数 */
512, /* 线程栈大小 */
1, /* 线程的优先级 */
20); /* 线程时间片 */
/* 启动线程,开启调度 */
if (alloc_thread != RT_NULL)
rt_thread_startup(alloc_thread);
else
return -1;
free_thread = /* 线程控制块指针 */
rt_thread_create( "free", /* 线程名字 */
free_thread_entry, /* 线程入口函数 */
RT_NULL, /* 线程入口函数参数 */
512, /* 线程栈大小 */
2, /* 线程的优先级 */
20); /* 线程时间片 */
/* 启动线程,开启调度 */
if (free_thread != RT_NULL)
rt_thread_startup(free_thread);
else
return -1;
}
/*
************************************************************
* 线程定义
*********************************************************
*/
static void alloc_thread_entry(void* parameter)
{
rt_kprintf("Requesting memory from the memory pool...........\n");
p_test = rt_mp_alloc(test_mp,0);
if (RT_NULL == p_test) /* 没有申请成功 */
rt_kprintf("Static memory application failed!\n");
else
rt_kprintf("Static memory application successful, address is %d! \n\n",p_test);
rt_kprintf("Writing data to P test...........\n");
*p_test = 1234;
rt_kprintf("Data has been written to the P test address\n");
rt_kprintf("*p_test = %.4d ,The address is:%d \n\n", *p_test,p_test);
/* 线程都是一个无限循环,不能返回 */
while (1) {
HAL_GPIO_TogglePin(LED2_GPIO_Port, LED2_Pin);
rt_thread_delay(1000); //每 1000ms 扫描一次
}
}
static void free_thread_entry(void* parameter)
{
rt_err_t uwRet = RT_EOK;
rt_kprintf("Freeing memory...........\n");
rt_mp_free(p_test);
rt_kprintf("Free memory successfully!\n\n");
rt_kprintf("Deleting memory...........\n");
uwRet = rt_mp_delete(test_mp);
if (RT_EOK == uwRet)
rt_kprintf("Memory removed successfully!\n");
/* 线程都是一个无限循环,不能返回 */
while (1) {
HAL_GPIO_TogglePin(LED1_GPIO_Port, LED1_Pin);
rt_thread_delay(500); //每 500ms 扫描一次
}
}
#else
//动态内存管理
/* 定义线程控制块 */
static rt_thread_t alloc_thread = RT_NULL;
static rt_thread_t free_thread = RT_NULL;
/* 定义申请内存的指针 */
static rt_uint32_t *p_test = RT_NULL;
/* 变量声明 */
/* 相关宏定义 */
#define TEST_SIZE 100 //内存大小(字节)
/* 函数声明 */
static void alloc_thread_entry(void* parameter);
static void free_thread_entry(void* parameter);
int MX_RT_Thread_Init(void)
{
rt_kprintf("This is an RTT dynamic memory management experiment!\n");
/* 创建一个线程 */
alloc_thread = /* 线程控制块指针 */
rt_thread_create( "alloc", /* 线程名字 */
alloc_thread_entry, /* 线程入口函数 */
RT_NULL, /* 线程入口函数参数 */
512, /* 线程栈大小 */
1, /* 线程的优先级 */
20); /* 线程时间片 */
/* 启动线程,开启调度 */
if (alloc_thread != RT_NULL)
rt_thread_startup(alloc_thread);
else
return -1;
free_thread = /* 线程控制块指针 */
rt_thread_create( "free", /* 线程名字 */
free_thread_entry, /* 线程入口函数 */
RT_NULL, /* 线程入口函数参数 */
512, /* 线程栈大小 */
2, /* 线程的优先级 */
20); /* 线程时间片 */
/* 启动线程,开启调度 */
if (free_thread != RT_NULL)
rt_thread_startup(free_thread);
else
return -1;
}
/*
************************************************************
* 线程定义
*********************************************************
*/
static void alloc_thread_entry(void* parameter)
{
rt_kprintf("Requesting memory from the memory pool...........\n");
p_test = rt_malloc(TEST_SIZE); /* 申请动态内存 */
if (RT_NULL == p_test) /* 没有申请成功 */
rt_kprintf("Dynamic memory application failed!\n");
else
rt_kprintf("Dynamic memory application successful, address is %d! \n\n",p_test);
rt_kprintf("Writing data to P test...........\n");
*p_test = 1234;
rt_kprintf("Data has been written to the P test address\n");
rt_kprintf("*p_test = %.4d ,Address is:%d \n\n", *p_test,p_test);
/* 线程都是一个无限循环,不能返回 */
while (1) {
HAL_GPIO_TogglePin(LED2_GPIO_Port, LED2_Pin);
rt_thread_delay(1000); //每 1000ms 扫描一次
}
}
static void free_thread_entry(void* parameter)
{
rt_kprintf("Freeing memory...........\n");
rt_free(p_test);
rt_kprintf("Free memory successfully!\n\n");
/* 线程都是一个无限循环,不能返回 */
while (1) {
HAL_GPIO_TogglePin(LED1_GPIO_Port, LED1_Pin);
rt_thread_delay(500); //每 500ms 扫描一次
}
}
#endif
/* 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 */
}
#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();
}
// Memory Management Configuration
// Using Memory Pool Management
// Using Memory Pool Management
#define RT_USING_MEMPOOL