通过AT89C51设计的一个时钟程序，通过定时器0的精确计时，作为准确定时的周期，连接1602液晶，同时连接按键，可实现调时的功能-By the AT89C51 design of a clock program, the precise timing of the timer 0, as accurate timing cycle, connecting 1602 LCD connection button at the same time adjustment function