按键驱动程序（混杂设备模型）

软件去抖动的原理就是：

定时器延时时刻到的时刻，按键的状态

要和在 定时器 启动 时刻按键的状态一致。-Key driver (hybrid device model)

Jitter is the principle of the software to:

State timer delay time to time, the keys

To start the timer and the key moments in a consistent state.