PCF8563的驱动程序，使用stm32硬件I2CC口线实现。含日期时间有效性判断函数，星期计算函数。 -PCF8563 driver to use the hardware I2C port stm32 Line. Time to judge the effectiveness of including the date of function, function of weeks.

vc6++读取系统时间日期，这种方法很好，很方便，我很喜欢。-Vc6++ read system time date, this method is very good, very convenient, I like it very much.