工业设备中常常会由于CPU资源不足而不得不采用扩展接口芯片来满足应用系统的需要，而出现这种情况的原因之一是键盘显示占用了太多的系统资源，本功能函数是解决了工业设备键盘扫描和LED显示.-Industrial equipment is often due to lack of CPU resources to the expansion interface chip to be used to meet the needs of application systems, and the emergence of one of the reasons for this situation is the keyboard takes up too much display of system resources, this function is to resolve industrial equipment keyboard scanning and LED display.