JFFS2文件系统在μClinux中的实现  

Realization of JFFS2 File System in μClinux

作　　者：行喜梁[1] 刘树东[1] 戴学丰[1] 

机构地区：[1]齐齐哈尔大学计算机控制与工程学院,黑龙江齐齐哈尔161006

出　　处：《现代电子技术》2009年第10期51-54,共4页Modern Electronics Technique

基　　金：黑龙江省海外学人科研基金资助项目(1055HQ036)

摘　　要：FLASH作为新型非易失性半导体存储器在嵌入式系统的开发中占有重要的地位。为了在嵌入式系统中实现数据的动态操作,介绍μClinux下的FLASH文件系统,特别是日志型文件系统的设计原理及特点;利用Linux提供的MTD接口,通过添加与FLASH对应的map driver和FLASH驱动,修改设备节点,配置内核等步骤,将JFFS2文件系统移植到s3c44b0使用的FLASH芯片上。通过挂载,用户可以像使用普通硬盘分区一样对此目录下面的文件进行操作,从而实现对FLASH的动态操作和管理。结果表明,在JFFS2文件系统下,保存的文件是可读写的,系统掉电后创建的文件也不会丢失。FLASH as a new type of non- volatile semiconductor memory plays an important role in embedded systems development. For achieving operating the data dynamically under embedded system,the FLASH file system under μClinux,in particular the design principles and charactertistecs of JFFS2 （log- file system）is introduced. Using MTD interface provided by Linux, through adding map driver and FLASH driver, modifying the device nodes, such as configuring core etc, transplanting JFFS2 file system to the FLASH chips of s3c44b0. Through the mount,users can operate the files under this directory as an ordinary hard driver partition,achieving operating dynamicly and managing for FLASH. The results show that files can be read and write after the creation under the JFFS2 file system. The files can＇t be lost even if the power is down.

关 键 词：FLASH JFFS2 内存技术设备 嵌入式系统 

分 类 号：TN302[电子电信—物理电子学]