目录
- 雅俗理解
- 源码下载链接
- 知识拓展
- 步骤1:stm32f103vet6移植freeRTOS步骤:
- (1)准备开发环境
- (2)添加FreeRTOS移植
- 致谢
雅俗理解
雅:FreeRTOS是一个开源的实时操作系统(RTOS),专为嵌入式系统设计,提供了任务管理、内存管理、调度器、信号量、消息队列等核心功能,以支持多任务并发执行,并确保任务在预定时间内完成。其设计注重低功耗、高效率和可移植性,适用于各种嵌入式设备,从小型传感器到复杂的工业控制系统都能够使用。是一个抢占式的实时操作系统,这意味着它能在多个任务之间切换执行,给人一种同时执行多个任务的感觉。但实际上,在单核处理器上,如STM32,它并不是同时执行多个任务,而是通过快速地在任务之间切换来实现的。
俗:FreeRTOS就像是一位超级聪明的班长,负责管理一群同学(任务)。他知道每个同学的重要性和完成任务的时间,所以能够很好地安排大家的工作,确保重要的任务不会晚交,每个人都能在规定时间内完成自己的工作。这样一来,整个班级的效率就会很高,每个人都能按时完成任务,不会出现混乱或者耽误。
源码下载链接
链接:https://pan.baidu.com/s/1NX_w8SA9KpWHqXQfLjuw6w?pwd=8686
提取码:8686
–来自百度网盘超级会员V4的分享
知识拓展
步骤1:stm32f103vet6移植freeRTOS步骤:
(1)准备开发环境
工程配置:
FreeRTOS源码获取: 官网源码下载
工程复制
文件再工程中添加头文件路径
在FreeRTOS文件夹下在新建一个FreeRTOSConfig.h头文件
新建一个" FreeRTOSConfig.h "
打开FreeRTOSv9.0.0源码,在“FreeRTOSv9.0.0\FreeRTOS\Demo”文件夹下面找到“CORTEX_STM32F103_Keil”这个文件夹,双击打开,在其根目录下找到这个“FreeRTOSConfig.h”文件,然后拷贝到我们工程的user文件夹下即可,对这个文件复制再进行修改`
/*
FreeRTOS V9.0.0 - Copyright (C) 2016 Real Time Engineers Ltd.
All rights reserved
VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
This file is part of the FreeRTOS distribution.
FreeRTOS is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License (version 2) as published by the
Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
***************************************************************************
>>! NOTE: The modification to the GPL is included to allow you to !<<
>>! distribute a combined work that includes FreeRTOS without being !<<
>>! obliged to provide the source code for proprietary components !<<
>>! outside of the FreeRTOS kernel. !<<
***************************************************************************
FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. Full license text is available on the following
link: http://www.freertos.org/a00114.html
***************************************************************************
* *
* FreeRTOS provides completely free yet professionally developed, *
* robust, strictly quality controlled, supported, and cross *
* platform software that is more than just the market leader, it *
* is the industry's de facto standard. *
* *
* Help yourself get started quickly while simultaneously helping *
* to support the FreeRTOS project by purchasing a FreeRTOS *
* tutorial book, reference manual, or both: *
* http://www.FreeRTOS.org/Documentation *
* *
***************************************************************************
http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
the FAQ page "My application does not run, what could be wrong?". Have you
defined configASSERT()?
http://www.FreeRTOS.org/support - In return for receiving this top quality
embedded software for free we request you assist our global community by
participating in the support forum.
http://www.FreeRTOS.org/training - Investing in training allows your team to
be as productive as possible as early as possible. Now you can receive
FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
Ltd, and the world's leading authority on the world's leading RTOS.
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
including FreeRTOS+Trace - an indispensable productivity tool, a DOS
compatible FAT file system, and our tiny thread aware UDP/IP stack.
http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
licenses offer ticketed support, indemnification and commercial middleware.
http://www.SafeRTOS.com - High Integrity Systems also provide a safety
engineered and independently SIL3 certified version for use in safety and
mission critical applications that require provable dependability.
1 tab == 4 spaces!
*/
#ifndef FREERTOS_CONFIG_H
#define FREERTOS_CONFIG_H
#include ".\sys\sys.h"
#include ".\usart\usart.h"
//针对不同的编译器调用不同的stdint.h文件
#if defined(__ICCARM__) || defined(__CC_ARM) || defined(__GNUC__)
#include <stdint.h>
extern uint32_t SystemCoreClock;
#endif
//断言
#define vAssertCalled(char,int) printf("Error:%s,%d\r\n",char,int)
#define configASSERT(x) if((x)==0) vAssertCalled(__FILE__,__LINE__)
/***************************************************************************************************************/
/* FreeRTOS基础配置配置选项 */
/***************************************************************************************************************/
#define configUSE_PREEMPTION 1 //1使用抢占式内核,0使用协程
#define configUSE_TIME_SLICING 1 //1使能时间片调度(默认式使能的)
#define configUSE_PORT_OPTIMISED_TASK_SELECTION 1 //1启用特殊方法来选择下一个要运行的任务
//一般是硬件计算前导零指令,如果所使用的
//MCU没有这些硬件指令的话此宏应该设置为0!
#define configUSE_TICKLESS_IDLE 0 //1启用低功耗tickless模式
#define configUSE_QUEUE_SETS 1 //为1时启用队列
#define configCPU_CLOCK_HZ (SystemCoreClock) //CPU频率
#define configTICK_RATE_HZ (1000) //时钟节拍频率,这里设置为1000,周期就是1ms
#define configMAX_PRIORITIES (32) //可使用的最大优先级
#define configMINIMAL_STACK_SIZE ((unsigned short)130) //空闲任务使用的堆栈大小
#define configMAX_TASK_NAME_LEN (16) //任务名字字符串长度
#define configUSE_16_BIT_TICKS 0 //系统节拍计数器变量数据类型,
//1表示为16位无符号整形,0表示为32位无符号整形
#define configIDLE_SHOULD_YIELD 1 //为1时空闲任务放弃CPU使用权给其他同优先级的用户任务
#define configUSE_TASK_NOTIFICATIONS 1 //为1时开启任务通知功能,默认开启
#define configUSE_MUTEXES 1 //为1时使用互斥信号量
#define configQUEUE_REGISTRY_SIZE 8 //不为0时表示启用队列记录,具体的值是可以
//记录的队列和信号量最大数目。
#define configCHECK_FOR_STACK_OVERFLOW 0 //大于0时启用堆栈溢出检测功能,如果使用此功能
//用户必须提供一个栈溢出钩子函数,如果使用的话
//此值可以为1或者2,因为有两种栈溢出检测方法。
#define configUSE_RECURSIVE_MUTEXES 1 //为1时使用递归互斥信号量
#define configUSE_MALLOC_FAILED_HOOK 0 //1使用内存申请失败钩子函数
#define configUSE_APPLICATION_TASK_TAG 0
#define configUSE_COUNTING_SEMAPHORES 1 //为1时使用计数信号量
/***************************************************************************************************************/
/* FreeRTOS与内存申请有关配置选项 */
/***************************************************************************************************************/
#define configSUPPORT_DYNAMIC_ALLOCATION 1 //支持动态内存申请
#define configTOTAL_HEAP_SIZE ((size_t)(20*1024)) //系统所有总的堆大小
/***************************************************************************************************************/
/* FreeRTOS与钩子函数有关的配置选项 */
/***************************************************************************************************************/
#define configUSE_IDLE_HOOK 0 //1,使用空闲钩子;0,不使用
#define configUSE_TICK_HOOK 0 //1,使用时间片钩子;0,不使用
/***************************************************************************************************************/
/* FreeRTOS与运行时间和任务状态收集有关的配置选项 */
/***************************************************************************************************************/
#define configGENERATE_RUN_TIME_STATS 0 //为1时启用运行时间统计功能
#define configUSE_TRACE_FACILITY 1 //为1启用可视化跟踪调试
#define configUSE_STATS_FORMATTING_FUNCTIONS 1 //与宏configUSE_TRACE_FACILITY同时为1时会编译下面3个函数
//prvWriteNameToBuffer(),vTaskList(),
//vTaskGetRunTimeStats()
/***************************************************************************************************************/
/* FreeRTOS与协程有关的配置选项 */
/***************************************************************************************************************/
#define configUSE_CO_ROUTINES 0 //为1时启用协程,启用协程以后必须添加文件croutine.c
#define configMAX_CO_ROUTINE_PRIORITIES ( 2 ) //协程的有效优先级数目
/***************************************************************************************************************/
/* FreeRTOS与软件定时器有关的配置选项 */
/***************************************************************************************************************/
#define configUSE_TIMERS 1 //为1时启用软件定时器
#define configTIMER_TASK_PRIORITY (configMAX_PRIORITIES-1) //软件定时器优先级
#define configTIMER_QUEUE_LENGTH 5 //软件定时器队列长度
#define configTIMER_TASK_STACK_DEPTH (configMINIMAL_STACK_SIZE*2) //软件定时器任务堆栈大小
/***************************************************************************************************************/
/* FreeRTOS可选函数配置选项 */
/***************************************************************************************************************/
#define INCLUDE_xTaskGetSchedulerState 1
#define INCLUDE_vTaskPrioritySet 1
#define INCLUDE_uxTaskPriorityGet 1
#define INCLUDE_vTaskDelete 1
#define INCLUDE_vTaskCleanUpResources 1
#define INCLUDE_vTaskSuspend 1
#define INCLUDE_vTaskDelayUntil 1
#define INCLUDE_vTaskDelay 1
#define INCLUDE_eTaskGetState 1
#define INCLUDE_xTimerPendFunctionCall 1
/***************************************************************************************************************/
/* FreeRTOS与中断有关的配置选项 */
/***************************************************************************************************************/
#ifdef __NVIC_PRIO_BITS
#define configPRIO_BITS __NVIC_PRIO_BITS
#else
#define configPRIO_BITS 4
#endif
#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY 15 //中断最低优先级
#define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY 5 //系统可管理的最高中断优先级
#define configKERNEL_INTERRUPT_PRIORITY ( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )
#define configMAX_SYSCALL_INTERRUPT_PRIORITY ( configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )
/***************************************************************************************************************/
/* FreeRTOS与中断服务函数有关的配置选项 */
/***************************************************************************************************************/
#define xPortPendSVHandler PendSV_Handler
#define vPortSVCHandler SVC_Handler
#define xPortSysTickHandler SysTick_Handler
#endif /* FREERTOS_CONFIG_H */
(2)添加FreeRTOS移植
添加stm32f10x_it.c和FreeRTOSConfig.h头文件都添加 FreeRTOS与中断服务函数有关的配置选项 宏定义
#define xPortPendSVHandler PendSV_Handler
#define vPortSVCHandler SVC_Handler
#define xPortSysTickHandler SysTick_Handler
注释掉函数
致谢
参考:FreeRTOS下载、文件说明、编译Demo、工程移植