说明：  本文介绍了嵌入式C的基础与扩展，同时也介绍了典型嵌入式系统构架， 面向接口开发及头文件包含规则， 黑盒子开发原则。
(This article describes the foundation and expansion of embedded C, and also describes the typical embedded system architecture, Oriented interface development and header file contains rules Black box development principles.)