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General high-efficient reliable Nor Flash data memory management method

A technology of data storage and management method, applied in the direction of response error generation, redundant code error detection, etc., can solve the problems of high data storage management cost, lack of reusability, etc., to achieve high execution efficiency and high practicability And the effect of promoting value and simple method

Inactive Publication Date: 2013-12-04
JIANGSU LINYANG ENERGY CO LTD +1
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  • Summary
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  • Description
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a universal, efficient and reliable Nor Flash data storage management method for the problems of high cost of data storage management and lack of reusability when Nor Flash is used as a storage medium in embedded devices

Method used

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  • General high-efficient reliable Nor Flash data memory management method
  • General high-efficient reliable Nor Flash data memory management method
  • General high-efficient reliable Nor Flash data memory management method

Examples

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Embodiment 1

[0034] Divide Nor Flash into two areas, the storage management area and the user data area. The first four sectors are the storage management area, and the remaining space is the user data area. The storage management area contains two copies of MDR tables, the main and backup. The main MDR table is located in the first and second sectors, and the backup MDR table is located in the third and fourth sectors. Each sector has 512 bytes of space.

[0035] The MDR table is composed of a header and file information records. The header is fixed at 32 bytes. The header includes: the number of file records, the CRC check of the entire MDR table; the information of each file record includes: file name, file length, creation time, The storage start address, CRC check, and the length of the file record information are fixed at 26 bytes.

[0036] When the user creates a new data file, retrieve the main MDR table, (if the main MDR table is damaged, retrieve the backup MDR table, if the bac...

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Abstract

The invention relates to a general high-efficient reliable Nor Flash data memory management method, which is used for data memory management of various embedded devices using Nor Flash as a data memory medium. The Nor Flash is divided into two areas, namely a memory management area and a user data area. User data is described in the form of files, management information related to the files is stored in an MDR (Memory Data Register) form of the memory management area, and user data content is stored in the user data area. The MDR form of the memory management area adopts a double-backup structure with CRC (Cyclic Redundancy Check), and the information of each user file in the MDR form has independent CRC. The user data file memory adopts a sliding memory management mode, and rollback times can be set. When data is corrupted, the data can be rolled back to the last correct content. The high efficiency and the high reliability of operation of each file are ensured, the data can also uniformly utilize space, and therefore the service life of the Nor Flash is furthest prolonged.

Description

technical field [0001] The invention relates to a general efficient and highly reliable data storage management method using Nor Flash as a data storage medium. Background technique [0002] At present, with the continuous development of electronic technology, embedded systems are more and more widely used in control, consumer, communication and other electronic products, and embedded technology is more and more closely integrated with people's lives. Flash memory is a non-volatile solid-state memory. It is a completely non-volatile memory that can provide reliable data power-off protection; and it can be written online and has a fast access speed. It is a high-reliability, high-speed Density of solid-state storage devices, at present, various Flash memories have gradually become the most important storage devices in embedded systems. [0003] Nor Flash is widely used in embedded devices that require high data storage security and reliability, as well as high cost and powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/10
Inventor 蒋长献陆寒熹
Owner JIANGSU LINYANG ENERGY CO LTD
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