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File system management module based on FRAM and Flash

A management module and file system technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of complex file system management, short service life, and Flash damage, so as to save data space and prevent data errors , The effect of ensuring reliability

Inactive Publication Date: 2010-12-08
NEWCAPEC ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the inherent characteristics of FLASH (requires sector erasure, and the usage is very short, only 100,000 times), when managing files, it will either cause damage to the Flash, or require a large amount of storage space to store each file in a circular storage mechanism. The file directory of the file (including: read and write pointers, file physical address and other file-related description information) makes file system management complex and maintenance troublesome and error-prone; at the same time, the reading speed of the file is reduced, and the FLASH storage space is greatly wasted

Method used

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  • File system management module based on FRAM and Flash
  • File system management module based on FRAM and Flash
  • File system management module based on FRAM and Flash

Examples

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Embodiment Construction

[0017] Such as figure 1 , 2 Shown, the file system management module based on FRAM and Flash of the present invention, it comprises FRAM memory (FM25CL64), Flash memory (AT45DB321), SPI interface (Header8); Described FRAM memory (FM25CL64), Flash memory (AT45DB321) communicate with the SPI interface (Header8) through a data bus respectively. A parallel circuit composed of capacitors C1 and C2 is electrically connected between the power supply voltage pin (VCC) and the common terminal pin (GND) of the Flash memory (AT45DB321); the working voltage pin (VDD) of the FRAM memory (FM25CL64) ) and the ground voltage pin (VSS) are electrically connected with a capacitor C3.

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Abstract

The invention discloses a file system management module based on FRAM and Flash, which comprises an FRAM memory, a Flash memory and an SPI interface, wherein the FRAM memory and the Flash memory are respectively connected to the SPI interface in communication through data buses. The file system management module has the advantages that a storage mechanism of storing catalogue files of a file system in the FRAM and contents of the file in the Flash is greatly convenient for users and saves data space, and the users can conveniently access the data only through calling a plurality of simple functions. Because the FRAM has the infinite erasing and writing service life, can not lose data after power-off, and can reliably store data for more than ten years, the method of storing the catalogue file of the file system in the FRAM memory simplifies the management of the catalogue file. Meanwhile, the file system management module can realize related verification and increase backups to the catalogue of the file system, and can restore data from a backup region when a main region fails to work.

Description

technical field [0001] The invention relates to an embedded file system management module, in particular to a file system management module based on FRAM and Flash. Background technique [0002] In the embedded field, the traditional file system is completely based on Flash storage, and the file management system of the operating system such as linux or Wince needs to be used to manage the file system. Due to the inherent characteristics of FLASH (requires sector erasure, and the usage is very short, only 100,000 times), when managing files, it will either cause damage to the Flash, or require a large amount of storage space to store each file in a circular storage mechanism. The file directory of the file (including: read and write pointers, file physical address and other file-related description information) makes the file system management complex and maintenance troubles are easy to make mistakes; at the same time, the reading speed of the file is reduced, and the FLASH...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 傅常顺秦天福张进
Owner NEWCAPEC ELECTRONICS CO LTD