一个基于ucos的文件管理系统 可以支持cf卡 硬盘等存储器 但是对于单独的flash芯片还需要自己编写硬件的底层驱动-based document management system can support cf memory card drives, etc. But for a separate flash chip also need to prepare themselves to the bottom of the hardware drivers

实现IO检测功能，通过IO底层驱动实现，能获取CPU的某路IO口功能-The IO detection function, achieve by IO the underlying driver, IO port access to the CPU of a road