可以检测按键长按还是短按功能的一个按键驱动，里面实现了一个小型的状态机，蛮不错的哦。-Keys can be detected long press or short press function a key driver which implements a small state machine, Oh, pretty good.

lacp代码，可以参照学习Lacp协议的相关状态机等知识-LACP code, can refer to the relevant state machine learning knowledge of Lacp protocol