序（约延时8ms）后再回到按键查询状态，不断循环；有按键时，LED动态显示子程序作为按键防抖延时被连续调用二次（约延时16ms），待按键处理程序执行完后，再回到按键查询状态，同时兼顾了按键扫描取值的准确性和LED动态显示的稳定性。秒定时采用定时器T0中断方式进行，60秒计数由定时-sequence (about 8ms delay) to come back button inquiries and continuously cycle; When a button, LED dynamic display subroutine as a button camera was delayed second consecutive Call (about 16ms latency), the key question after the implementation process, to return to the keys for the state, taking into account the keys scanning accuracy and value of the LED display dynamic stability. Seconds regularly used T0 timer interrupt, 60 seconds count by the timing