嵌入式USB主机文件系统设计与优化  

Design and optimization of embedded file system in embedded USB-HOST device

作　　者：许东亮[1] 

机构地区：[1]南京大学计算机科学与技术系,江苏南京210093

出　　处：《计算机工程与设计》2008年第10期2671-2673,2677,共4页Computer Engineering and Design

摘　　要：目前嵌入式USB主机系统应用非常广泛,因此在实际应用中,如何设计与优化嵌入式USB主机系统的文件系统显得尤其重要和关键。在对FAT16文件系统结构原理和基于USB主机接口的嵌入式文件系统体系结构分析的基础上,提出了一些文件系统的实现和优化方法,并给出了具体的优化过程,通过优化提高了嵌入式USB主机文件系统在某些实时性要求高的应用场合的效率和性能。Currently embedded USB-HOST system has been applied far and wide, consequently how to realize the design and optimization of its file system becomes especially significant and crucial for the application of the embedded USB-HOST system. On the basis of anal- yzing the structure principle of FAT16 file system and system structure of embedded file system based on the USB-HOST device, some optimizations methods to design and optimize the file system are presented. Then the related realization process of these optimizations is given, By implementing these methods, the efficiency and performance of file system are improved, especially for some applications with high requirement of real-time data.

关 键 词：通用串口总线 文件系统 逻辑块寻址 海量存储类 簇 

分 类 号：TP311.11[自动化与计算机技术—计算机软件与理论]