AT89S52单片机驱动ds1302时钟芯片的实时时钟程序，通过1602液晶显示，带年月日时分秒，农历（L），闹钟（A），阳历（C）。-AT89S52 microcontroller driver ds1302 clock chip real-time clock program through 1602 LCD display with year, month, day, minute and second the Lunar (L), alarm clock (A), Gregorian (C,).