Novel memory-based embedded file system and realization method thereof

Abstract

The invention discloses a novel memory-based embedded file system and a realization method thereof. A serial peripheral interface Nand flash (SPI Nand flash) chip is arranged in the system. The method comprises the steps of determining that the system supports the SPI Nand flash chip after the system is initialized; setting a corresponding memory technology device (MTD) layer interface during file processing, wherein the MTD layer interface is called when the SPI Nand flash chip is accessed; identifying bad blocks of the SPI Nand flash chip and performing marking and storage, wherein the stored bad block marks are used for troubleshooting the marked bad blocks when the file system accesses the SPI Nand flash chip; performing partitioning processing on the SPI Nand flash chip according to a preset condition; and in a file processing process, accessing the SPI Nand flash chip in a specified partition, thereby finishing file access operation.

Description

technical field [0001] The invention relates to the field of computer storage, in particular to an embedded file system based on a novel memory and its realization method. Background technique [0002] In the field of embedded product development, the size of the entire chip is required to be smaller and smaller, the external interface is less and less, and at the same time, the storage requirements for data must be met. To meet the above requirements, there are many restrictions on the selection of Flash memory. The pin design and layout of the usual Flash memory are very complicated, so a new type of memory is integrated on such a chip to realize the file system at the same time. Method is a very meaningful thing. [0003] In the data storage system, the file system is implemented based on the NAND (Not AND, Nand) Flash memory, which has the characteristics of no loss of data after power failure, fast data access speed, electrical erasability, large capacity, and online p...

AI Technical Summary

Problems solved by technology

[0004] However, when implementing a file system based on Nand flash memory, due to the use of complex I / O interfaces to access data serially, the complexity of software system-level implementation (including the implementation of related timing configurations and I / O interface functions) is greatly increased. Moreover, the size of the chip is large and there are many external interfaces, which cannot well meet the existing requirements for small chip size and few interfaces.

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