UC/FS做的文件系统很好.高版本的一般只有库文件.CF卡是一种很方便的存储设备。网上可得到的CF卡的驱动程序少三个文件：初始化、读和写。本代码测试读写成功。-UC / FS file system so well. High-only version for the general document. CF card is a very convenient storage devices. Online availability of the CF card driver less thre