采用定时器中断的方法，设计一个一天24小时进制的实时时钟；用6个发光二极管分别显示时、分、秒的记时； 能进行整点报时。可以从键盘中预置、修改时钟值。含有硬件设计图-timer interruption using the method to design a band 24 hours a day in real-time clock; With six light-emitting diodes showed the hours, minutes, and seconds to the ent