通过定时器定时来给按键消抖，每隔一段时间进行一次定时中断。-Timer key debounce

按键按下、弹起、长按、组合算法,中断延时消抖.-Button is pressed, bounce, long press, the combination of algorithms, interrupt latency jitter elimination.

简单易懂，不占用任务定时器和延时的按键识别程序，无需去延时消抖，即可识别长按、短按、连续短按。-Simple and easy to understand, do not take the task timer and delay the key recognition program, without the need to delay the shake, you can identify the long press, short press, continuous short press