详细论述了系统硬件标准的选取、软件流程设计、及部分软件功能模块，并给出了相关测试程序和软件界面。
This paper elaborated how to selecting hardware standards, software design process, and software function modules, and gave the relevant test procedures and software interface.
其硬件电路及软件编程简单、方便，可节省程序代码空间和CPU运行时间，是一种使用广泛的串行总线接口标准。
And its hardware circuit and software programming are simple and convenient, so it can economize program code space and CPU running time. It is a sort of standard of serial bus interface used widely.
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