51单片机新型按键扫描，不用10ms延时消抖，实时性大大提高。每个按键有长按短按功能，采用结构体对象化编程，增加按键极度方便。(The new key scan does not use 10ms delay to eliminate jitter, and the real-time performance is greatly improved. Each button has a long press, a short press function, the use of structured object programming, increasing the key, extremely convenient.)