DS1307实时时钟器件的驱动，包含1307.C和iic.c,DS1307 real time clock device driver, including 1307.C and iic.c

DS1307 實時時鐘 source code-Ds1307 driver

STM32或C51的驱动代码。C51的版本。但是接口和驱动是分开写的的，比较好移植到其他平台设备。-STM32 or C51 driver code. C51 version. But the interface and drive are written separately, and relatively good to other platforms.