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RTOS关键的部分是实时多任务内核，它的基本功能包括任务管理、定时器管理、存储器管理、资源管理、事件管理、系统管理、消息管理、队列管理、旗语管理等,
这些管理功能是通过内核服务函数形式交给用户调用的，也就是RTOS的API。
RTOS的引入，解决了嵌入式软件开发标准化的难题。随着嵌入式系统中软件比重不断上升、应用程序越来越大，对开发人员、应用程序接口、程序档案的组织管理成为一个大的课题。引入RTOS相当于引入了一种新的管理模式，对于开发单位和开发人员都是一个提高。
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