教科书上常用的按键程序很多时候误导了使用者。例如其中的消机械抖动用延时10MS部分浪费了CPU大部分资源，这里介绍了一种通过检测键值变化的企业内部常用编程方法。-Textbooks commonly used keys on the procedure the user is often misleading. For example, mechanical energy dissipation with delay jitter 10MS most part a waste of CPU resources, this paper presents a key by detecting changes in programming methods commonly used within enterprises.