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。
基于RTOS开发出的程序，具有较高的可移植性，实现90%以上设备独立，一些成熟的通用程序可以作为专家库函数产品推向社会。嵌入式软件的函数化、产品化能够促进行业交流以及社会分工化，减少重复劳动，提高知识创新的效率。
嵌入式工业的基础是以应用为中心的芯片设计和面向应用的软件开发。实时多任务操作系统(RTOS)进入嵌入式工业的意义不亚于历史上机械工业采用三视图的贡献，对嵌入式软件的标准化和加速知识创新是一个里程碑
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