今天写了一个基于DS1302的时钟程序，起初功能比较复杂，后来经过一再压

缩，实现了下面的这个可以说是大大简化了的时钟，这里没有多字节写出和

多字节读入，没有理会年月日，只用了两个小子程序来实现单字节的读入和

写出，再用chai子程序把字节拆开，最后用DIS来显示出来，拿出来共享一 下。

（这里的写出子程序主程序中没有用到，需要时可以用来设置时间，我觉得

设置时间这个功能是基本的，遂保留）-Today, wrote a program based on the DS1302 clock initially feature more complex and after repeated pressure

　　　Reduction to achieve this the following can be said to greatly simplify the clock, there are no multi-byte write and

　　　Multi-byte read, without regard to date, only two procedures to achieve the guy single-byte read in and

　　　To write, and then chai subroutine to bytes apart, and finally DIS to show up, look out to share.

　　　(Where the main program is not used to write subroutines when needed can be used to set the time, I think

　　　Set the time this function is fundamental, accordingly reservations)