本文UCOS是根据我学习ARM开发以来的一些经验总结，以自己设计的S3C44B0X板为例，给出入门上手的最基础知识。有些东西只是个人的主观认为，不一定准确，算作抛砖引玉吧，欢迎大家指正！-this paper is based on my study of the ARM since some experience to design its own board of S3C44B0X example, the entry is easily the most basic knowledge.