JFFS2文件系统在天熠操作系统中的实现

摘要

介绍一种在天熠实时嵌入式操作系统上实现JFFS2日志文件系统的方案.基于Zynq7045处理器平台,以开源JFFS2为原型,对外部接口重新进行设计,通过了软件和硬件方法的验证.介绍JFFS2的实现原理,描述JFFS2代码在天熠操作系统上的移植方法、NandFlash驱动程序的设计方法以及用软件模拟设备和实际的NandFlash存储芯片对JFFS2的功能进行验证的情况.实际验证结果表明,该方案切实可行,是对天熠操作系统文件管理功能的增强.%An implementation scheme of JFFS2 file system on Tyche real-time embedded operating system was introduced.Based on the Zynq7045 processor platform,the scheme used the open source JFFS2 as the prototype,and it was redesigned for the external interface,and verified by software and hardware.The implementation principle of JFFS2 log structured file system was introduced,the method of porting the JFFS2 code to the Tyche operating system and designing NandFlash driver were described.The functions of JFFS2 verified by the software simulation equipment and the actual NandFlash memory chip were introduced.The actual verification results show that the scheme is feasible,and it is the enhancement for the file management function of the Tyche operating system.