uc/fs 4.07最新版本，里面包括fs的所有操作文档，如SD, MMC，flash， 有系统函数的调用解释。本文档是官方网站下载的，为英文版-Uc/fs 4.07 the latest version, including the fs all operations documents, such as SD, MMC, flash, systematic function call to explain. This document is the official website to d