用在51单片机上的时间程序，分时秒计时和显示的时钟，可以用键来调整，用iic发送到显示，刚学者用单片机做菜单和机器控制可以参考下。-51 microcontroller used in the time procedures, and time-of-use metering seconds of the clock shows that can be used to adjust the bond, use iic sent to show that scholars do MCU control menu and machines can refer to the next.