Abstract:

To solve the problem that traditional FAT format file data access method is unable to adapt to the query operations of the large\|scale catalog file in large\|scale mass storage device as the traditional data access method of FAT format file is sequential access, the wear-leveling algorithm is proposed, optimizing wear block of flash in NandFlash storage medium using bitmap storage technology is realized, and memory index and idle directory of an embedded file system are optimized. A simulation program is developed, and simulation experiments are carried out based on ARM9 MagicARM2410 board. The result shows that the basic functions of the file system can be realized, and the feasibility is verified.

Key words: filesystem, embedded, NandFlash