用单片机实现数字时钟功能。



1、时-分-秒（2位-2位-2位）显示，可通过键盘置入时间值；

2、可通过按键控制在LED上从右向左滚动显示年_月_日3次；

3、实现每日闹铃提醒功能，闹铃时间可用按键设置。闹铃采用提示音表示；

4、实现秒表功能；

5、设计实现变调闹铃提示音或音乐提示音。

-Digital clock function with a single chip. 1 pm- hours- seconds (2-2-2 bit bit) display, the keyboard into a time value　2, can be controlled via buttons on the LED scroll from right to left on _ day of _ 3　3, to achieve a daily reminder alarm feature, set the alarm time can be key. Said with a tone alarm　4, to achieve a stopwatch function　5, Design and Implementation of tone alarm beep tone or music.