CN102467522B - Self-programming method and device of file system based on NAND flash - Google Patents
Self-programming method and device of file system based on NAND flash Download PDFInfo
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Abstract
The invention discloses a self-programming method of a file system based on NAND flash, which comprises the steps that the binary file of the file system is analyzed to acquire a file system information file; and after electrification, a boot loader program reads the data of the file system information file from the NAND flash, saves the data and checks whether the check code, the magic number and/or the unique identification code of the file system information file in the file system information file are all correct or not, and if so, the programming of the file system is conducted. The invention additionally discloses a self-programming device of the file system based on the NAND flash. By adopting the method and the device disclosed by the invention, the programming of the file system can be rapidly realized, the requirements on programming equipment and technicians can be reduced, and the development cost and the production cost can also be reduced.
Description
Technical field
The present invention relates to the programming technology certainly of file system, refer to a kind of programming method certainly and device of the file system based on nand flash memory (FLASH) especially.
Background technology
NAND FLASH is a kind of of FLASH, and it is inner to adopt non-linear macroelement pattern, for the realization of solid-state large-capacity internal memory provides cheap effective solution.Reach advantages such as rewriting speed is fast more greatly because NAND FLASH has capacity, be applicable to the storage of mass data, therefore, in the industry cycle obtained widespread use.
In embedded system, usually with the storer of NAND FLASH as program and data, and utilize file system that NAND FLASH is managed, described file system can be file configuration table (FAT, File Allocation Table), flash memory device log type file system (JFFS, Joumalling Flash File System), YAFFS (Yet Another Flash Filing System) etc.Recorded the file and the directory information that are stored on the NAND FLASH in the file system, file system is by different Data Identification identification file, catalogue and other information.Also have some files and catalogue, the data in the spare district of file system by writing on NAND FLASH also are the data in OOB district, and it is identified.Simultaneously, file system also is kept among the NAND FLASH with binary form.
At present, use is that NAND FLASH DLL (dynamic link library), the network file system(NFS) of utilizing NAND FLASH programmable device, embedded central processing unit (CPU, Central Processing Unit) to carry realizes in conjunction with the Boot loader utility of embedded system or the programming device that some are special-purpose based on the programming of NAND FLASH comparatively widely.Wherein, but NAND FLASH programmable device is very fast expensive to the programming of NAND FLASH, and the model of the NAND FLASH that supports of programmable device is limited; Though the NAND FLASH DLL (dynamic link library) that embedded type CPU carries programming is convenient, can not programme to all file system, and speed is slower; When using network file system(NFS) to carry out the file system programming in conjunction with the method for the Boot loader utility of embedded system, need to rely on the function of Boot loader utility, network file system server and network, need in the use repeatedly artificial setting Boot loader utility or the start-up parameter of operating system with use different system commands, so, could be with the file system correct programming.Whole process is not only very consuming time, and very high to personnel's requirement, is not suitable for large-scale production; The price comparison costliness of special-purpose programming device, and generally need to use network, so, can cause the leakage of data.
In sum, exist in the existing programming process consuming time, to equipment and the too high defective of technical requirement.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of programming method certainly and device of the file system based on NAND FLASH, with solve existing consuming time from the programming process, to equipment and the too high problem of technical requirement.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of programming method certainly of the file system based on NAND FLASH, this method comprises:
The bibliographic structure of root file system is converted to the binary file of file system;
The binary file of resolution file system obtains the filesystem information file;
After powering on, the Boot loader utility reads and preserves the data of filesystem information file from NAND FLASH, whether the check code of the filesystem information file in the checking file system information file and magic number and/or unique identification sign indicating number be all correct, determine all correct after, carry out the programming of file system.
In the such scheme, the binary file of described resolution file system obtains the filesystem information file, for:
Filesystem information file configuration information according to pre-configured arranges magic number and/or unique identification sign indicating number;
Utilize magic number and/or unique identification sign indicating number, the check code of calculation document system information file.
In the such scheme, the binary file of described resolution file system obtains the filesystem information file, further comprises: utilize the data in the binary file of file system, calculation document system data check code; And/or,
Data in the binary file of Study document system obtain the filesystem information file.
In the such scheme, before powering on, this method further comprises: the binary file of Boot loader utility, operating system, filesystem information file and file system writes among the NAND FLASH by the NAND FLASH DLL (dynamic link library) that CPU carries.
In the such scheme, the described programming of carrying out file system, for:
The Boot loader utility reads file system data in the address according to the fixed or fixing NAND FLASH appointment of filesystem information document;
Wipe in the zone that needs is write file system data afterwards;
According to record in the filesystem information file or appointed file system type and programmed method system file data is write NAND FLASH from the fixed reference position of filesystem information document or the reference position of fix N AND FLASH appointment, all write up to the file system data that reads;
Revise the sign of data for having rewritten of described filesystem information file.
In the such scheme, when in the filesystem information file during include file system data check code, before wiped in the zone that needs is write file system data, this method further comprised:
According to the file system data that reads, calculation document system data check code;
The file system data check code that calculates and the file system data check code in the filesystem information file are compared, determine identical after, wipe in the zone that then needs is write file system data.
In the such scheme, read and preserve the data of filesystem information file from NAND FLASH before, this method further comprises:
The Boot loader utility is carried out initialization operation to equipment after starting.
The present invention also provide a kind of file system based on NAND FLASH from programmer, this device comprises: Binary Conversion unit, resolution unit and Boot loader utility unit; Wherein,
The Binary Conversion unit is for the binary file that the bibliographic structure of root file system is converted to file system;
Resolution unit, the binary file for the resolution file system obtains the filesystem information file;
Boot loader utility unit, after being used for powering on, from NAND FLASH, read and preserve the data of filesystem information file, whether the check code of the filesystem information file in the checking file system information file and magic number and/or unique identification sign indicating number be all correct, determine all correct after, carry out the programming of file system.
In the such scheme, this device further comprises the NAND FLASH DLL (dynamic link library) that CPU carries, and is used for the binary file of Boot loader utility, operating system, filesystem information file and file system is write NAND FLASH.
Certainly the programming scheme of the file system based on NAND FLASH provided by the invention, the Boot loader utility reads and preserves the data of filesystem information file from NAND FLASH, whether the check code of the filesystem information file in the checking file system information file, magic number and/or unique identification sign indicating number be all correct, determine all correct after, carry out the programming of file system, so, can realize the programming of file system fast, and, the requirement to programming device and technician can also be reduced, and then research and development and production cost can be reduced.
In addition, the binary file of Boot loader utility, operating system, filesystem information file and file system writes among the NAND FLASH by the NAND FLASH DLL (dynamic link library) that CPU carries, do not need additionally to use external device to write again, so, can guarantee to write the security of the data among the NAND FLASH.
Description of drawings
Fig. 1 is the method flow of the programming certainly synoptic diagram that the present invention is based on the file system of NAND FLASH;
Fig. 2 is that embodiment is based on the method flow of the programming certainly synoptic diagram of the file system of NAND FLASH;
Fig. 3 be the present invention is based on NAND FLASH file system from the programmer structural representation.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
The present invention is based on the programming method certainly of the file system of NAND FLASH, as shown in Figure 1, may further comprise the steps:
Step 101: the binary file of resolution file system obtains the filesystem information file;
Here, check code and magic number and/or the unique identification sign indicating number of described filesystem information file include file system information file further, can also comprise: file system data check code and/or filesystem information; Wherein, magic number and/or unique identification sign indicating number are used for the identity of identification document system information file; Described filesystem information may further include: the number of pages amount that the number of blocks that file system byte number, file system take, file system take, file system programming mode, file system reference position and other information that needs at programming process; Described file system data check code is used for the correctness of verification file system data;
The binary file of described resolution file system obtains the filesystem information file, is specially:
Filesystem information file configuration information according to pre-configured arranges magic number and/or unique identification sign indicating number;
Utilize magic number and/or unique identification sign indicating number, the check code of calculation document system information file;
Particularly, when if filesystem information file configuration information comprises magic number, then utilize the check code of magic number calculation document system information file, when if filesystem information file configuration information comprises the unique identification sign indicating number, then utilize the unique identification yardage to calculate the check code of filesystem information file, when if filesystem information file configuration information comprises magic number and unique identification sign indicating number, then utilize magic number and unique identification yardage to calculate the check code of filesystem information file; Wherein, calculate the method adopt and can be arbitrary method of existing all calculation check sign indicating number, such as cyclic redundancy check (CRC) (CRC, Cyclic Redundancy Check) method etc.;
It is arbitrary string that magic number and/or unique identification sign indicating number can be set;
Wherein, need profile system message file configuration information according to the user, described filesystem information file configuration information comprises the check code of filesystem information file, magic number and/or unique identification sign indicating number and/or file system data check code and/or filesystem information, in other words, by the data in the content decision filesystem information file of configuration information; Give an example, the security that customer requirements is higher, and in subsequent operation according to the filesystem information in the filesystem information file, carrying out from the programming process, can profile system message file configuration information be the check code of filesystem information file, magic number, unique identification sign indicating number, file system data check code, filesystem information then;
When in the filesystem information file configuration information during include file system data check code, the process that obtains the filesystem information file can further include:
Utilize the data in the binary file of file system, calculation document system data check code;
When in the filesystem information file configuration information during include file system information, the process that obtains the filesystem information file can further include:
Data in the binary file of Study document system obtain filesystem information;
Wherein, calculate the method adopt and can be arbitrary method of existing all calculation check sign indicating number, such as the CRC method etc.;
The content of described filesystem information file comprises: the number of pages amount that the number of blocks that file system byte number, file system take, file system take, file system programming mode, file system reference position and other information at the programming process needs;
Before the binary file of resolution file system, this method can further include:
The bibliographic structure of root file system is converted to the binary file of file system;
Concrete processing procedure and the existing conversion process of conversion are identical, and the instrument that transforms employed binary file can be the instrument of existing all binary file, such as the mkyaffsimage instrument of support YAFFS etc.
Step 102: after powering on, the Boot loader utility reads and preserves the data of filesystem information file from NAND FLASH, whether the check code of the filesystem information file in the checking file system information file, magic number and/or unique identification sign indicating number be all correct, determine all correct after, carry out the programming of file system;
Particularly, the Boot loader utility can be preserved magic number and/or unique identification sign indicating number in advance, after the data that from NANDFLASH, read and preserve the filesystem information file, magic number and/or the unique identification sign indicating number of the magic number in the filesystem information file and/or unique identification sign indicating number and self preservation are compared, determine identical after, think that then magic number and/or unique identification sign indicating number are correct; And, the Boot loader utility is utilized magic number and/or the unique identification sign indicating number in the filesystem information file, adopt the check code of the computing method calculation document system information file identical with resolving, afterwards the check code of the filesystem information file in the filesystem information file is compared with the check code of the filesystem information file that calculates, determine identical after, think that then the check code of filesystem information file is correct; Wherein, the Boot loader utility is known the method for calculation check sign indicating number in advance;
After check code, magic number and/or the unique identification sign indicating number of the filesystem information file in determining the filesystem information file is incorrect, then do not carry out any operation;
Before powering on, this method can further include:
The binary file of Boot loader utility, operating system, filesystem information file and file system writes among the NAND FLASH by the NAND FLASH DLL (dynamic link library) that CPU carries;
Read and preserve the data of filesystem information file from NAND FLASH before, this method can further include:
The Boot loader utility is carried out initialization operation to equipment after starting; Wherein, equipment mainly is NAND FLASH and internal memory, and concrete processing procedure and existing processing procedure are identical, repeat no more here;
The described programming of carrying out file system is specially:
The Boot loader utility reads file system data in the address according to the fixed or fixing NAND FLASH appointment of filesystem information document;
Wipe in the zone that needs is write file system data afterwards;
According to record in the filesystem information file or appointed file system type and programmed method file system data is write NAND FLASH from the fixed reference position of filesystem information document or the reference position of fix N AND FLASH appointment, all write up to the file system data that reads;
Revise the sign of data for having rewritten of described filesystem information file;
Wherein, when in the filesystem information file during include file system information, then according to reading file system data in the fixed address of filesystem information document, accordingly, according to the file system type that records in the filesystem information file and programmed method system file data is write NAND FLASH from the fixed reference position of filesystem information document, all write up to the file system data that reads, that is: the piece of all NAND FLASH of recording in the filesystem information file and the data of page or leaf are all write;
When comprising not filesystem information in the filesystem information file, then read file system data in the address according to fixing NANDFLASH appointment, accordingly, according to appointed file system type and programmed method system file data is write NANDFLASH from the reference position of fix N AND FLASH appointment, all write up to the file system data that reads;
Described file system data refers to the content of the binary file of file system;
The zone that described needs write file system data is exactly the zone of depositing the file system data that reads;
When in the filesystem information file during include file system data check code, before wiped in the zone that needs is write file system data, this method can further include:
According to the file system data that reads, calculation document system data check code;
The file system data check code that calculates and the file system data check code in the filesystem information file are compared, determine identical after, wipe in the zone that then again needs is write file system data, otherwise, withdraw from the programming process of file system;
Wherein, the Boot loader utility is known the method for calculation check sign indicating number in advance;
Revise the data of described filesystem information file for after the sign of having rewritten, when start next time, after the content that reads described filesystem information file is for the sign of having rewritten, then can not enter programming process;
After the programming of file system finishes, Boot loader utility load operation system, behind the operating system, file system can be used; Wherein, concrete processing procedure and the existing processing procedure of load operation system are identical, repeat no more here.
Remake below in conjunction with the present invention of embodiment and to describe in further detail.
The application scenarios of present embodiment is: the programming process of the YAFFS2 file system in the embedded Linux platform; The YAFFS2 file system is a kind of file system that can use at jumbo NAND FLASH, and it can be supported by operating systems such as Linux or WinCE; The Boot loader utility adopts the U-BOOT1.3.4 version, and the core of embedded type CPU is ARM926EJS, and its dominant frequency is 180MHz; Adopt the mkYAFFS2image instrument bibliographic structure of YAFFS2 root file system to be converted to the binary file of YAFFS2 file system.
Present embodiment as shown in Figure 2, may further comprise the steps based on the programming method certainly of the file system of NAND FLASH:
Step 201: the binary file that the bibliographic structure of YAFFS2 root file system is converted to the YAFFS2 file system.
Step 202: according to pre-configured filesystem information file configuration information, resolve the binary file of YAFFS2 file system, obtain the filesystem information file;
Here, pre-configured filesystem information file configuration information comprises the check code of filesystem information file, magic number, unique identification sign indicating number, file system data check code, filesystem information; Accordingly, the filesystem information file that obtains comprises the concrete data of check code, YAFFS2 file system data check code and the YAFFS2 filesystem information of magic number, unique identification sign indicating number, filesystem information file; Wherein, described filesystem information comprises: the number of pages amount that the number of blocks that file system byte number, file system take, file system take, file system programming mode, file system reference position and other information at the programming process needs.
The binary file of step 203:Boot loader utility, operating system, filesystem information file and YAFFS2 file system writes among the NAND FLASH by the NAND FLASH DLL (dynamic link library) that CPU carries;
Here, operating system is Linux;
The binary file of YAFFS2 file system is preserved in the mode of 2048 bytes+64 bytes, needs 2048 bytes are write in the page or leaf of NAND FLASH in programming process, and 64 bytes write in the corresponding spare of this page district.
Step 204: after powering on, the Boot loader utility is carried out initialization operation to NAND FLASH and internal memory after starting.
Step 205:Boot loader utility reads and preserves the data of filesystem information file from NAND FLASH, whether the check code of the filesystem information file in the checking file system information file, magic number and/or unique identification sign indicating number be all correct, if it is correct, then execution in step 206, otherwise, execution in step 210;
Here, can arrange that the display reminding technician by buzzing or liquid crystal display makes mistakes when incorrect.
Step 206:Boot loader utility according to the YAFFS2 file system data that reads, is calculated YAFFS2 file system data check code according to reading file system data in the fixed address of filesystem information document.
Step 207: whether the YAFFS2 file system data check code that judgement calculates is identical with the YAFFS2 file system data check code in the filesystem information file, if identical, then execution in step 208, otherwise, withdraw from the programming process of YAFFS2 file system, execution in step 210 afterwards;
Here, can arrange that the display reminding technician by buzzing or liquid crystal display makes mistakes when incorrect.
Step 208: wipe in the zone that needs is write file system data, according to the file system type that records in the filesystem information file and programmed method system file data is write NAND FLASH from the fixed reference position of filesystem information document afterwards, the data of the piece of all NAND FLASH that record in the filesystem information file and page or leaf all write.
Step 209: after finishing, revise the sign of data for having rewritten of described filesystem information file, load operation system afterwards, execution in step 210 afterwards.
Step 210: finish current treatment scheme.
Adopt said method, the time of whole process is about 34s, after programming finishes and after operating system loads, just can carry out the execution of application program.After operating system restarts, then do not need to enter from the programming process and directly carry out the operation of load operation system.
If adopt existing network file system(NFS) (NFS, Network File System) to carry out the programming of YAFFS2 file system in conjunction with U-BOOT, then need to prepare a Linux server and start nfs server.Need after U-BOOT starts the technician arrange linux kernel Starting mode, the agreement (IP that interconnects between the nfs server network is set, Intemet Protocol) media interviews of address, this machine are controlled (MAC, Media Access Control), are reached the IP address.After operating system nucleus starts successful carry NFS file system, Shell by Linux orders the catalogue with the YAFFS2 file system to write among the NAND FLASH, need technician reset operation system more afterwards, revise the U-BOOT parameter afterwards, make operating system read file system data on the NAND FLASH, the YAFFS2 file system on could correct identification NAND FLASH after operating system nucleus starts again.Whole process probably needs 10 minutes, and needs technician's setting Boot loader utility repeatedly or the start-up parameter system command different with use of operating system, just can finish whole programming.
Be to realize said method, the present invention also provide a kind of file system based on NAND FLASH from programmer, as shown in Figure 3, this device comprises: resolution unit 31, NAND FLASH32; Wherein,
NAND FLASH32 comprises Boot loader utility unit 321;
NAND FLASH32 is used for the memory file system message file;
Boot loader utility unit 321, after being used for powering on, from NAND FLASH32, read and preserve the data of filesystem information file, whether the check code of the filesystem information file in the checking file system information file, magic number and/or unique identification sign indicating number be all correct, determine all correct after, carry out the programming of file system.
Wherein, this device can further include the Binary Conversion unit, is used for the bibliographic structure of root file system is converted to the binary file of file system;
This device can further include: the NAND FLASH DLL (dynamic link library) that CPU carries is used for the binary file of operating system, filesystem information file and file system is write NAND FLASH32; Also be used for the Boot loader utility is write Boot loader utility unit 321.
Described Boot loader utility unit 321 after also being used for starting, carries out initialization operation to equipment.
Described Boot loader utility unit 321 also is used for not carrying out any operation after check code, magic number and/or the unique identification sign indicating number of the filesystem information file of determining the filesystem information file are incorrect.
Described Boot loader utility unit 321, after the programming that also is used for file system finishes, the load operation system.
Here, the concrete processing procedure of the Boot loader utility unit in the described device of the present invention describes in detail hereinbefore, repeats no more.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the programming method certainly based on the file system of nand flash memory FLASH is characterized in that, this method comprises:
The bibliographic structure of root file system is converted to the binary file of file system;
The binary file of resolution file system obtains the filesystem information file;
After powering on, the Boot loader utility reads and preserves the data of filesystem information file from NAND FLASH, whether the check code of the filesystem information file in the checking file system information file and magic number and/or unique identification sign indicating number be all correct, determine all correct after, carry out the programming of file system.
2. method according to claim 1 is characterized in that, the binary file of described resolution file system obtains the filesystem information file, for:
Filesystem information file configuration information according to pre-configured arranges magic number and/or unique identification sign indicating number;
Utilize magic number and/or unique identification sign indicating number, the check code of calculation document system information file.
3. method according to claim 2 is characterized in that, the binary file of described resolution file system obtains the filesystem information file, further comprises:
Utilize the data in the binary file of file system, calculation document system data check code; And/or,
Data in the binary file of Study document system obtain the filesystem information file.
4. according to claim 1,2 or 3 described methods, it is characterized in that before powering on, this method further comprises:
The binary file of Boot loader utility, operating system, filesystem information file and file system writes among the NAND FLASH by the NAND FLASH DLL (dynamic link library) that central processor CPU carries.
5. according to claim 1,2 or 3 described methods, it is characterized in that, the described programming of carrying out file system, for:
The Boot loader utility reads file system data in the address according to the fixed or fixing NAND FLASH appointment of filesystem information document;
Wipe in the zone that needs is write file system data afterwards;
According to record in the filesystem information file or appointed file system type and programmed method system file data is write NAND FLASH from the fixed reference position of filesystem information document or the reference position of fix N AND FLASH appointment, all write up to the file system data that reads;
Revise the sign of data for having rewritten of described filesystem information file.
6. method according to claim 5 is characterized in that, when in the filesystem information file during include file system data check code, before wiped in the zone that needs is write file system data, this method further comprised:
According to the file system data that reads, calculation document system data check code;
The file system data check code that calculates and the file system data check code in the filesystem information file are compared, determine identical after, wipe in the zone that then needs is write file system data.
7. method according to claim 5 is characterized in that, read and preserve the data of filesystem information file from NAND FLASH before, this method further comprises:
The Boot loader utility is carried out initialization operation to equipment after starting.
One kind based on the file system of NAND FLASH from programmer, it is characterized in that this device comprises: Binary Conversion unit, resolution unit and Boot loader utility unit; Wherein,
The Binary Conversion unit is for the binary file that the bibliographic structure of root file system is converted to file system;
Resolution unit, the binary file for the resolution file system obtains the filesystem information file;
Boot loader utility unit, after being used for powering on, from NAND FLASH, read and preserve the data of filesystem information file, whether the check code of the filesystem information file in the checking file system information file and magic number and/or unique identification sign indicating number be all correct, determine all correct after, carry out the programming of file system.
9. device according to claim 8, it is characterized in that, this device further comprises the NAND FLASH DLL (dynamic link library) that CPU carries, and is used for the binary file of Boot loader utility, operating system, filesystem information file and file system is write NAND FLASH.
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| CN 201010538436 CN102467522B (en) | 2010-11-10 | 2010-11-10 | Self-programming method and device of file system based on NAND flash |
| PCT/CN2011/077581 WO2012062132A1 (en) | 2010-11-10 | 2011-07-25 | Self-programming method and device for file system based on nand flash memory |
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| CN102799496A (en) * | 2012-06-30 | 2012-11-28 | 深圳市同洲电子股份有限公司 | Method and device for checking operating system kernel and file system in Nand-flash memory |
| CN105740287B (en) * | 2014-12-11 | 2019-09-10 | 中国航空工业集团公司第六三一研究所 | The creation method of the curable read-only file system in FLASH |
| CN108040069A (en) * | 2017-12-28 | 2018-05-15 | 成都数成科技有限公司 | A kind of quick method for opening network data APMB package |
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| CN101431441A (en) * | 2008-12-12 | 2009-05-13 | 北京邮电大学 | Method for on-line updating FPGA system embedded with CPU |
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| WO2012062132A1 (en) | 2012-05-18 |
| CN102467522A (en) | 2012-05-23 |
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