CN103853587A - Method for writing flash based on cramfs and JFFS2 - Google Patents
Method for writing flash based on cramfs and JFFS2 Download PDFInfo
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- CN103853587A CN103853587A CN201410099798.XA CN201410099798A CN103853587A CN 103853587 A CN103853587 A CN 103853587A CN 201410099798 A CN201410099798 A CN 201410099798A CN 103853587 A CN103853587 A CN 103853587A
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Abstract
The invention provides a method for writing a flash based on cramfs and JFFS2. The method specifically comprises the steps of firstly creating a file system with a format of cramfs, then creating a file with a format of JFFS2, respectively writing the two mirror image files into different partitions of the flash, setting starting parameters, and mounting partition files into a starting script of the file system which is created previously so as to realize automatic mounting of the files with different formats into the system after starting up is executed. Compared with the prior art, the method for writing the flash based on the cramfs and the JFFS2 has the advantages that application or a file folder to be used is made into a mirror image with the format of JFFS2 so as to be mounted into a relevant catalog in the file system with the format of cramfs, so that the file can be read and written in a read only file system; the method is high in practicability, wide in application range and easy to popularize.
Description
Technical field
The present invention relates to field of computer technology, specifically the method for programming flash based on the use of mkfs instrument and linux script edit, cramfs and jffs2 a kind of.
Background technology
Different file system types has different features, and jffs2 is read-write supported data log type file system compression, based on Hash table, and collapse/power down safeguard protection is provided, and " writing balance " support etc. is provided.Shortcoming is mainly in the time that file system is full or approach completely, because of the relation of refuse collection, the travelling speed of jffs2 is slowed down greatly; Cramfs compressibility is high, speed is fast, but its read only attribute is again a large defect, and user cannot be expanded its content.If above two kinds of files are combined and can realize the advantage that had both met high compression, high-speed cruising, can meet again read-write advantage.
Summary of the invention
Technical assignment of the present invention is to solve the deficiencies in the prior art, and the method for programming flash based on cramfs and jffs2 a kind of is provided.
Technical scheme of the present invention realizes in the following manner, the method of this kind of programming flash based on cramfs and jffs2, its specific implementation process is: the file system of first making cramfs form, and then making jffs2 formatted file, respectively by these two kinds of image file programmings in the different subregions of flash, set start-up parameter and increase by this partitioned file of step carry in the file system booting script of previously making, can realize on the rear automatic carry of system of start the file of different-format.
The detailed process of described programming method is:
Revise booting script, the image file of the jffs2 form of carry is added in starting up's script, after system boot, get final product like this data of carry jffs2 in the catalogue of cramfs file system;
Make cramfs root file system: the image file that by mkfs.cramfs instrument, root file system is made into cramfs form in linux main frame;
New folder in linux main frame, and the module that will use or executable program directly copy in this file, is made into jffs2 form image file by mkfs.jffs2 system tool;
Modification kernel code resets flash partition table and is used for depositing root file system and jffs2 formatted data image file;
In bootloader by programming order by file system with the programming of jffs2 packet in the different subregions of flash;
In bootloader, set the root file system that starts the cramfs form that path is programming, start powers on and can enter into cramfs root file system, also can realize the image file of jffs2 form is mounted in local folders, the catalogue on hanging over is carried out to load-on module or read-write operation simultaneously.
The beneficial effect that the present invention compared with prior art produced is:
The method of a kind of programming flash based on cramfs and jffs2 of the present invention is exclusively used in the file system of embedded system, the advantage of cramfs and these two kinds of different file of jffs2 is integrated and makes a kind of HPFS (High-Performance File System), can realize the advantage of cramfs file system high compression rate, can realize again the read-write characteristic of jffs2 file system, in readable documents system, realize the read-write operation to file by the read-write subregion of carry, practical, applied widely, be easy to promote.
Embodiment
Below the method for a kind of programming flash based on cramfs and jffs2 of the present invention is described in detail below.
The method of programming flash based on cramfs and jffs2 a kind of, adopt file system and important data or application program are made into different-format image file respectively programming to the method in the different subregions of flash equipment, realize the file that has two kinds of forms in a cover system, realize the read-write function to file in read-only file system.Its specific implementation process is: the file system of first making cramfs form, and then making jffs2 formatted file, respectively by these two kinds of image file programmings in the different subregions of flash, set start-up parameter and increase by this partitioned file of step carry in the file system booting script of previously making, can realize on the rear automatic carry of system of start the file of different-format.
The detailed process of described programming method is:
Revise booting script, the image file of the jffs2 form of carry is added in starting up's script, after system boot, get final product like this data of carry jffs2 in the catalogue of cramfs file system;
Make cramfs root file system: the image file that by mkfs.cramfs instrument, root file system is made into cramfs form in linux main frame;
New folder in linux main frame, and the module that will use or executable program directly copy in this file, is made into jffs2 form image file by mkfs.jffs2 system tool;
Modification kernel code resets flash partition table and is used for depositing root file system and jffs2 formatted data image file;
In bootloader by programming order by file system with the programming of jffs2 packet in the different subregions of flash;
In bootloader, set the root file system that starts the cramfs form that path is programming, start powers on and can enter into cramfs root file system, also can realize the image file of jffs2 form is mounted in local folders, the catalogue on hanging over is carried out to load-on module or read-write operation simultaneously.
The foregoing is only embodiments of the invention, within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (2)
1. the method for the programming flash based on cramfs and jffs2, it is characterized in that its specific implementation process is: the file system of first making cramfs form, and then making jffs2 formatted file, respectively by these two kinds of image file programmings in the different subregions of flash, set start-up parameter and increase by this partitioned file of step carry in the file system booting script of previously making, can realize on the rear automatic carry of system of start the file of different-format.
2. the method for a kind of programming flash based on cramfs and jffs2 according to claim 1, is characterized in that the detailed process of described programming method is:
Revise booting script, the image file of the jffs2 form of carry is added in starting up's script, after system boot, get final product like this data of carry jffs2 in the catalogue of cramfs file system;
Make cramfs root file system: the image file that by mkfs.cramfs instrument, root file system is made into cramfs form in linux main frame;
New folder in linux main frame, and the module that will use or executable program directly copy in this file, is made into jffs2 form image file by mkfs.jffs2 system tool;
Modification kernel code resets flash partition table and is used for depositing root file system and jffs2 formatted data image file;
In bootloader by programming order by file system with the programming of jffs2 packet in the different subregions of flash;
In bootloader, set the root file system that starts the cramfs form that path is programming, start powers on and can enter into cramfs root file system, also can realize the image file of jffs2 form is mounted in local folders, the catalogue on hanging over is carried out to load-on module or read-write operation simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410099798.XA CN103853587A (en) | 2014-03-18 | 2014-03-18 | Method for writing flash based on cramfs and JFFS2 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410099798.XA CN103853587A (en) | 2014-03-18 | 2014-03-18 | Method for writing flash based on cramfs and JFFS2 |
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| CN103853587A true CN103853587A (en) | 2014-06-11 |
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| CN201410099798.XA Pending CN103853587A (en) | 2014-03-18 | 2014-03-18 | Method for writing flash based on cramfs and JFFS2 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104392189A (en) * | 2014-12-12 | 2015-03-04 | 北京元心科技有限公司 | Method and device for realizing safety operation of file system |
| CN106325905A (en) * | 2015-06-30 | 2017-01-11 | 深圳市中兴微电子技术有限公司 | A Flash burning method, single board, upper computer and system |
| CN107291484A (en) * | 2016-04-11 | 2017-10-24 | 龙芯中科技术有限公司 | The method and device of programming bare board |
| CN107562483A (en) * | 2017-07-26 | 2018-01-09 | 博为科技有限公司 | A kind of method and device of carry guiding file system |
| CN110032542A (en) * | 2019-04-19 | 2019-07-19 | 宁波三星医疗电气股份有限公司 | A kind of cramfs file system management method, device and electronic equipment |
| CN112579545A (en) * | 2020-12-28 | 2021-03-30 | 惠州华阳通用电子有限公司 | Linux file system mounting method and storage medium |
| CN112631993A (en) * | 2020-12-28 | 2021-04-09 | 厦门市美亚柏科信息股份有限公司 | File addition and deletion trace analysis method and system based on JFFS2 file system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101384997A (en) * | 2006-03-01 | 2009-03-11 | 安讯士有限公司 | Method and system for upgrading a plurality of devices |
| CN103577210A (en) * | 2012-08-06 | 2014-02-12 | 广州三星通信技术研究有限公司 | System and method for mounting between mobile terminals |
-
2014
- 2014-03-18 CN CN201410099798.XA patent/CN103853587A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101384997A (en) * | 2006-03-01 | 2009-03-11 | 安讯士有限公司 | Method and system for upgrading a plurality of devices |
| CN103577210A (en) * | 2012-08-06 | 2014-02-12 | 广州三星通信技术研究有限公司 | System and method for mounting between mobile terminals |
Non-Patent Citations (3)
| Title |
|---|
| 周清杰等: "《混合文件系统在嵌入式智能车辆控制器中的应用》", 《机械管理开发》 * |
| 李伟等: "《嵌入式车载音像信号处理技术的研究》", 《理论与方法》 * |
| 赵小林: "《嵌入式Linux系统研究与网络设备驱动程序开发》", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104392189A (en) * | 2014-12-12 | 2015-03-04 | 北京元心科技有限公司 | Method and device for realizing safety operation of file system |
| CN104392189B (en) * | 2014-12-12 | 2017-10-10 | 北京元心科技有限公司 | The method and apparatus for realizing file system safe operation |
| CN106325905A (en) * | 2015-06-30 | 2017-01-11 | 深圳市中兴微电子技术有限公司 | A Flash burning method, single board, upper computer and system |
| CN107291484A (en) * | 2016-04-11 | 2017-10-24 | 龙芯中科技术有限公司 | The method and device of programming bare board |
| CN107291484B (en) * | 2016-04-11 | 2021-05-25 | 龙芯中科技术股份有限公司 | Method and device for programming bare board |
| CN107562483A (en) * | 2017-07-26 | 2018-01-09 | 博为科技有限公司 | A kind of method and device of carry guiding file system |
| CN110032542A (en) * | 2019-04-19 | 2019-07-19 | 宁波三星医疗电气股份有限公司 | A kind of cramfs file system management method, device and electronic equipment |
| CN110032542B (en) * | 2019-04-19 | 2021-04-27 | 宁波三星医疗电气股份有限公司 | Cramfs file system management method and device and electronic equipment |
| CN112579545A (en) * | 2020-12-28 | 2021-03-30 | 惠州华阳通用电子有限公司 | Linux file system mounting method and storage medium |
| CN112631993A (en) * | 2020-12-28 | 2021-04-09 | 厦门市美亚柏科信息股份有限公司 | File addition and deletion trace analysis method and system based on JFFS2 file system |
| CN112579545B (en) * | 2020-12-28 | 2024-03-29 | 惠州华阳通用电子有限公司 | Linux file system mounting method and storage medium |
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