基于vhdl的数字钟 有闹钟,秒表,时钟,日期等功能 秒表可以开始,暂停,清零, 时钟可以设置时间, 还可以设置日期-VHDL based on the digital clock has an alarm clock, stopwatch, clock, date, stopwatch functions can start, pause, cleared, the clock can be set-up times, you can set the date