pic16f877 程序运用到的ds1302的时钟芯片，时间运行比较精确，可以调整时间，时间的调整时有光标的闪烁提示。可以显示时间，日期，年月，其中年月有闰年的自动调整功能，还有调整过程中的月分的大小月的日期的调整。

-Liquid crystal display commonly used 1602 and 12864 models of, this time because the plate on the PIC is 1602 models, so I write is 1602 models, 1602 have the operation of the line 8, there are four lines operating procedures, at first, a reference

Online program, modify the eight line is written the program, but due to the operation of the four lines with a lot of the time also attune not to come out, so Then write the electric clock program, with eight line of the display. But because the experiment on the board is to answer the four line method, so I decided to The 4 line or continue to debugging, and then at last a success, so then write programs are used four zhang s 1602 shows the result