通用数据库操作系统，不属个人开发， 网上收集。-Universal Database operating system, not a matter of personal development, on-line collection.

FN UD的一下重要组件，printf函数需要用到，没有它就调用不到printf函数(This is the H-file for FN UD - K60, is very importan for K60 to how to use the 'Printf')