12864液晶显示实时时钟,按键可调时钟时间,有模式切换功能,分别切换到,时间调整分钟调整与星期调整,本程序利用单片机定时器中断可以较准确的显示出实时时间-12864 LCD display real-time clock, keypad adjustable clock time, a mode switching function, respectively, to switch to, adjust time and adjust the minute adjustment and wee