说明：  dalas ds1302实时钟芯片51单片机程序,包含字节读写,批量读写,时间初始化等全部功能函数,注释详细,可直接使用
(dalas ds1302 real time clock chip microcontroller 51 programs, including the byte read, write, read and write volume and time to initialize, and all other features function, detailed comments can be used directly)