CN102103597A - DSP (digital signal processor) embedded FLASH file storage system - Google Patents
DSP (digital signal processor) embedded FLASH file storage system Download PDFInfo
- Publication number
- CN102103597A CN102103597A CN2009102013147A CN200910201314A CN102103597A CN 102103597 A CN102103597 A CN 102103597A CN 2009102013147 A CN2009102013147 A CN 2009102013147A CN 200910201314 A CN200910201314 A CN 200910201314A CN 102103597 A CN102103597 A CN 102103597A
- Authority
- CN
- China
- Prior art keywords
- data
- area
- root directory
- file
- configuration list
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
The invention discloses a DSP (digital signal processor) embedded FLASH file storage system which comprises a root directory area, a data area, a file allocation table area, a backup root directory area and a backup file allocation table area, wherein the root directory area is used for storing file names, file lengths and the serial numbers of first data blocks corresponding to file data; the data area is used for storing the file data, and comprises a plurality of data blocks of equal size; the file allocation table area is used for storing pointer corresponding relationships between data blocks; the backup root directory area is connected with the root directory area, and used for carrying out recovery on the data in the root directory area when the root directory area goes wrong; and the backup file allocation table area is connected with the file allocation table area, and used for carrying out recovery on the data in the file allocation table area when the file allocation table area goes wrong. The file storage system disclosed by the invention has the advantages of convenient FLASH-space management, high management efficiency, high operation speed, and capability of facilitating the program maintenance and upgrade.
Description
Technical field
The present invention relates to a kind of document storage system, relate in particular to the embedded FLASH document storage system of DSP that a kind of convenience manages the FLASH space.
Background technology
All the time, in the DSP embedded system, all be to realize by form visit FLASH with data to the management in flash memory (FLASH) space, data on FLASH according to physical address from low to high order deposit.Please participate in Fig. 1, the FLASH structural representation that it is deposited in proper order for existing a kind of data.The last division of FLASH has a plurality of data storage areas such as program area 11, Chinese Character reservoir area 12, OSD (On-Screen Display screen menu type regulative mode) parameter region 13 and network parameter district 14, wherein, program area 11 is used to deposit program, and its address space is 0x0-0x19FFFF; Chinese Character reservoir area 12 is used to deposit Hanzi font library, and address space is 0x1A0000-0x1E1B50; OSD parameter region 13 is used to deposit the parameter relevant with OSD, and address space is 0x1F0000-0x1F0FFF; Network parameter district 14 is used to deposit the parameter relevant with network, and address space is 0x1F1000-0x1F1FFF.In this kind structure, because the The data order is deposited, the position in each data storage interval connects each other, the change wherein position in any one data storage interval all can cause the position in other data storage intervals to change, this just makes the program maintenance and the upgrade job complexity in later stage, inconvenient the FLASH space is managed.
For example, the program length of newly writing is that 0x200000 is greater than 0x1A0000, the address space 0x0-0x19FFFF of so original program area 11 will can not hold any more new program, need open up a new bigger space and deposit new procedures, in order to find the 0x200000 FLASH space of a free time, the user need know the space structure of whole FLASH.And, the FLASH free space that to have a length be 0x200000 though worse situation is FLASH, they are not continuous.Have a part of free space as Chinese Character reservoir area and OSD parameter region, OSD parameter region and network parameter district be some free space again.At this moment, just need all move the position of these parameter regions, the free space that just to obtain a continuous length be 0x200000, overstepping the bounds of propriety the loosing that free space distributes, the adjustment work that need carry out is complicated more.This shows, when program maintenance and upgrading, if want the deposit position of data is adjusted, need the user very clear to the storage configuration of whole FLASH, knowing clearly start address and the length of each data space on FLASH, and, need rearrange the space structure of FLASH, make that the management in FLASH space is very inconvenient, the efficiency of management is low.
In sum, there is FLASH space management inconvenience in prior art, the efficiency of management is low and be unfavorable for program upgrade and the technical matters of maintenance.
Summary of the invention
The object of the present invention is to provide the embedded FLASH document storage system of a kind of DSP, with solve FLASH space management inconvenience in the prior art, the efficiency of management is low and be unfavorable for program upgrade and the technical matters of maintenance.
For achieving the above object, the object of the present invention is to provide the embedded FLASH document storage system of a kind of DSP, be used for the FLASH space is managed, comprising:
Root directory area is in order to the numbering of depositing filename, file size and depositing first data block of respective file data;
The data field, in order to deposit file data, this data field further comprises several equal-sized data blocks;
The file configuration list area is in order to the pointer corresponding relation between the store data piece;
The backup root directory area is connected with root directory area, and the content of backup root directory area storage in order to when root directory area is made mistakes, is replaced the data in the root directory area, and the data in the root directory area are recovered; And
Backup file configuration list area is connected with the file configuration list area, the content of backup file configuration list area storage, and in order to when make mistakes in the file configuration list area, the data in the alternate file configuration list area are recovered the data in the file configuration list area.
According to the embedded FLASH document storage system of the described DSP of preferred embodiment of the present invention, its root directory area is identical with the structure of backup root directory area, and this root directory area and backup root directory area include 48 root directorys, and the length of each root directory is 16bytes.
According to the embedded FLASH document storage system of the described DSP of preferred embodiment of the present invention, its each data block is pressed address number consecutively from high to low, the corresponding numbering of each data block.
According to the embedded FLASH document storage system of the described DSP of preferred embodiment of the present invention, its data field comprises 48 data blocks, and the size of each data block is 64Kbyte.
According to the embedded FLASH document storage system of the described DSP of preferred embodiment of the present invention, its file configuration list area deposit one first verification and, backup file configuration list area deposit one second verification and, first verification and equal the file configuration list area and all data accumulations of root directory area and low eight bit data, in order to verification file configuration list area and root directory area; Second verification and equal backup file configuration list area and the used data accumulation in backup root directory area and low eight bit data, dispose list area and backup root directory area in order to the verification backup file; When first bad checksum, check second verification and, if second verification and not makeing mistakes, replace data in file configuration list area and the root directory area with the data in backup file configuration table district and the backup root directory area, carry out the data recovery; Otherwise, if second verification and also makeing mistakes is then formatd total system.
According to the embedded FLASH document storage system of the described DSP of preferred embodiment of the present invention, the maximum storage capacity of this system is 3Mbyte.
The embedded FLASH document storage system of DSP of the present invention is with the form visit FLASH of file, and the deposit position of management data on FLASH manages the FLASH space.Use this document storage system, as long as the user provides filename and file size just can carry out read and write access to the data on the FLASH.When the position of some data spaces changes, document storage system can automatically arrange a suitable position to deposit this data, and needn't arrange its position on FLASH by the user, make the user under the situation of the storage configuration on the FALSH, also can effectively manage data on the FLASH not understanding data space.Therefore, document storage system of the present invention is convenient to be managed the FLASH space, has improved the efficiency of management to the FLASH space, and, make things convenient for the program maintenance and the upgrading in later stage.
In addition, this document storage system only keeps basic file operation such as reading and writing, deletion, removed maintenance for the impracticable parameter of DSP embedded system, as file Time Created, file modification time etc., therefore the algorithm of this system is simple, size of code is few, and travelling speed is fast, more helps guaranteeing the real-time of DSP embedded system.And the size of this system's data block is set to 64Kbytes, and is identical with the data block size of FLASH self, further improved the speed that FLASH reads and writes data.
Description of drawings
The FLASH structural representation that Fig. 1 deposits in proper order for existing a kind of data;
Fig. 2 is the structure principle chart of the embedded FLASH document storage system of DSP of the present invention.
Embodiment
Below in conjunction with accompanying drawing, specify the present invention.
See also Fig. 2, the embedded FLASH document storage system of a kind of DSP is used for the FLASH space is managed, and comprising: root directory area 21, file configuration list area 22, data field 23, backup root directory area 24 and backup file configuration list area 25.
The numbering of root directory area 21 in order to deposit filename, file size and to deposit first data block of respective file data, root directory area 21 comprises some root directorys; File configuration list area 22 is in order to the pointer corresponding relation between the store data piece, and it comprises the plurality of data block pointer; Data field 23 is in order to depositing file data, and this data field further comprises several equal-sized data blocks.
In this example, the quantity of data block pointer equates with the quantity of data block, the corresponding data block of each data block pointer.During system works, at first in root directory area 21, find first data block numbering of corresponding filename and this document, in file configuration list area 22, find all data blocks of depositing this document then successively, at last the data of read-write respective data blocks from data field 23.
Backup root directory area 24 is connected with root directory area 21, and identical with the structure of root directory area 21.The content of backup root directory area 21 storages in the backup root directory area 24 in order to when root directory area 21 is made mistakes, is replaced the data in the root directory area 21, and the data in the root directory area 21 are recovered.Backup file configuration list area 25 is connected with file configuration list area 22, and is identical with the structure of file configuration list area 22.The content of backup file configuration list area 22 storages in the backup file configuration list area 25, in order to when make mistakes in file configuration list area 22, the data in the alternate file configuration list area 22 are recovered the data in the file configuration list area 22.
Deposited in the file configuration list area 22 one first verification and, deposited in the backup file configuration list area 25 one second verification and, first verification and and second verification and size be 1bytes.Wherein, first verification and equal file configuration list area 22 and root directory area 21 used data accumulations and low eight bit data, in order to verification file configuration list area 22 and root directory area 21; Second verification and equal backup file configuration list area 25 and backup root directory area 24 used data accumulations and low eight bit data, in order to verification backup file configuration list area 25 and backup root directory area 24.When first bad checksum, expression file configuration list area 22 and root directory area 21 are made mistakes, at this moment, system test second verification and, if second verification and not makeing mistakes, just, carry out data and recover with the data in replacement file configuration list area 22 of the data in backup file configuration table district 25 and the backup root directory area 24 and the root directory area 21; Otherwise, if second verification and also makeing mistakes is then formatd total system.
Root directory area 21 comprises 48 root directorys, and therefore, system of the present invention can store 48 files at most.As shown in table 1, the length of each root directory is 16bytes, and it comprises fields such as FileName, Index and FileLen, and wherein, FileName is used to deposit filename, and its length is 11bytes; Index is used to deposit the numbering of first data block of respective file data, and length is 1bytes; FileLen is used to deposit file size, and length is 4bytes.In this example, because the length of FileName is 11bytes, therefore, the length of the filename of system's storage should not surpass 11 bytes, and the part that surpasses will be ignored by system.For example, for filename " filenameistoolong ", " filenameistootoolong " and " filenameisto ", same filename is thought by system.Simultaneously, document storage system of the present invention is distinguished the capital and small letter of filename.
| Field | Bytes | Description |
| FileName | byte0-byte10 | Filename, maximum file is called 11 bytes |
| Index | byte11 | File is in the position of the initial pointer in FAT district |
| FileLen | Byte12-byte15 | File size |
Table 1 root directory structure
Because the structure of backup root directory area 24 is identical with the structure of root directory area 21, therefore, the present invention repeats no more.In preferred embodiment of the present invention, root directory area 21 and backup root directory area 24 take up room respectively and are 0x7D0000-0x7D02FF and 0x7E0000-0x7E02FF, altogether 16bytes*48*2=1536bytes.
For the situation of deposit data in a plurality of data blocks, need a pointer a plurality of data blocks are coupled together, represent that they are data of same file, this pointer just leaves in the file configuration list area 22.As shown in table 2, file configuration list area 22 is a chained list, and total length is 49bytes, and it comprises 48 FAT_index and an EmptyNums.Wherein, each FAT_index is used to deposit a data block pointer, represents the position of next data block pointer, and the size of each FAT_index is 1bytes.For example, FAT[0]=1, the next data block of No. 0 data block of expression is No. 1, they belong to same file.EmptyNums is used to deposit the number of remaining data block pointer, and size is 1bytes.The present invention use 0xFF to represent this data block pointer is useless is used, 0xFE represents that this data block pointer has been last node on the chain.For example, FAT[1]=0xFE represents last data block that No. 1 data block is this document.Fat[2]=0xFF represents that No. 2 data blocks are not used.
| Field | Bytes | Description |
| EmptyNums | byte0 | Remaining data block pointer number |
| FAT_index | byte1-byte48 | Point to next data block pointer |
Table 2 file configuration table plot structure
Equally, because backup file configuration list area 25 is identical with the structure of file configuration list area 22, the present invention also repeats no more.In preferred embodiment of the present invention, file configuration list area 22 and backup file configuration list area 25 take up room and are respectively 0x7D0300-0x7D0330 and 0x7E0300-0x7E0330, and length overall is 49bytes*2=98bytes.
Data field 23 is in order to deposit file data, and is as shown in table 3, and in preferred embodiment of the present invention, the data field comprises 48 data blocks, and each data block is pressed address number consecutively from high to low, the corresponding numbering of each data block.And, because the size of the minimum of the FALSH chip that uses read-write piece is 64Kbytes, for the data block size with FLASH self is complementary to improve travelling speed, the size that the present invention is provided with data block also is 64Kbytes, so the maximum storage capacity of document storage system of the present invention is 3Mbyte.
| 0?byte-0xFFFF byte | 0x10000byte-0x1FFFF byte | ...... | 0x2F0000byte-0x2FFFF Fbyte |
| Data block 0 | Data block 1 | ...... | Data block 47 |
Table 3 data area structure
48 data blocks in the data field 23 are corresponding one by one with 48 data block pointers in the file configuration list area 22, because each file takies a data block at least, so document storage system of the present invention can be deposited 48 files at most.
In this example, for the data block size with FLASH self is complementary to improve travelling speed, 48 root directorys, 48 data block pointers and 48 data blocks are set in data field, file configuration list area and data field respectively, but, need to prove, the present invention does not limit the quantity of concrete root directory, data block pointer and data block, more than adopting 48 root orders, 48 data block pointers and 48 data blocks are set in data field, file configuration list area and data field is an example, and is not used in qualification the present invention.
More than introduced the composition of the embedded FLASH document storage system of DSP of the present invention, below respectively to this system create file, open file, written document, the process of reading operations such as file and deleted file be illustrated.
Create file operation:
The embedded FLASH document storage system of DSP of the present invention is created file according to filename.Because root directory area has the filename of the All Files in file system at present, so document storage system at first travels through whole root directory area, if find to have had 48 filenames, the supporting paper system completely can not hold new file more so, creates the file operation failure; If the filename of discovery root directory area is identical with the filename that given needs are created, that illustrates that this file exists, can not add the file of a same file name again; If do not find identical filename and number of files to be less than 48, document storage system can be applied for a new root directory so, and the filename of new files inserted this root directory, the root directory with this new application joins in the root directory area again, finishes the operation of creating file.
Open file operation:
Need the user that the mode of operation of filename and file is provided when opening file, the mode of operation of file is divided into read-only and only writes two kinds.For opening file with read-only mode, at first check whether there has been this filename in the root directory area, show that if there is no the user attempts to open a non-existent file, failure opens file; If filename has been present in the root directory area, that file system can find the root directory of this filename correspondence, and reads start address and the file size of file in the file configuration list area in this root directory, and start address and file size are returned to the user.
Open file for a WriteMode, also will at first check whether there has been this filename in the root directory area, if there is no, file system can be called the establishment documentation function, attempt to create a new file.If create the file failure, that open file operation is also returned failure, if create the file success, that file system can return to the user to start address and the file size of new files in the file configuration list area, and this moment, these values all were 0 certainly.If in the root directory area there to be the filename that need open, file system can be with this file delete so, rebulid a new file with this filename name then, also return the file configuration list area start address and the file size of this file at last, this moment, these values also all were 0 certainly.As seen, open file, if file configuration list area start address of successfully returning and file size must be 0 with a WriteMode.
Operating writing-file:
The user can only carry out write operation to the file of successfully opening with a WriteMode.The number of idle data block pointer, FAT[n at first check in system] be free pointer for 0xFF represents this data block pointer.Whenever have the data block pointer of a free time just to represent the data block of a free time in addition, file system also just can also be held the data of 64Kbytes.If the file size that the remaining data block of file system space writes less than needs, write operation can return failure so.
If can find the data block pointer of a free time, that at first notes this data block pointer in the position of file configuration list area, is designated as n, and this is worth as the file configuration list area start address in the corresponding root directory of file.Find data block [n] then and data are write wherein.
If data block [n] can be held down all data, that is just with FAT[n] value change 0xFE into, the data block pointer chain end of expression file.If but a data block can not be held total data down, that just need find another idle data block pointer again from the file configuration list area after having write data block [n], the position of supposing this data block pointer is m, with FAT[n] value be revised as m, expression FAT[n] sensing FAT[m], again with remaining data writing data blocks [m].If also have remaining data just to continue to seek the idle data block pointer, revise the data block pointer chain, data are filled up in the data block, until all data all are written in the data field, and the value of last data block pointer are written as the end that 0xFE represents the data block pointer chain.
Read file operation:
The user can only carry out read operation to the file of successfully opening with read-only mode.At first file system can use the file configuration list area start address of being read file to find corresponding data block pointer and data block as index in file configuration list area and data field, if the start address of file configuration list area is n, so Dui Ying data block pointer and data block is respectively FAT[n] and data block [n].
Then judge FAT[n] value, as just representing that for 0xFE this is last data block pointer of file, only need be just passable according to the data in the file size reading corresponding data block.As FAT[n] value be certain value of 0-47, just represent that the data block pointer chain does not finish, read operation need read out all data along the indication of data block pointer chain from the corresponding data block piece, be 0xFE up to the value that runs into the data block pointer.
Delete file operation:
Document storage system comes deleted file according to filename.The method of deleted file is similar with the method for creating file, and whether it also can be sought at root directory area earlier needs the deleted file name to exist, if do not exist deletion action to do nothing, file system can not change; If exist, that finds the root directory of filename correspondence, delete this root directory, find the corresponding data block pointer according to the sane configuration list area start address in the root directory then, all change the value of all data block pointers that used into 0xFF along the data block pointer chain, represent that promptly this piece is a free block.Note this moment of data in the deleted data district not, because as long as the data block pointer be the free time, it is invalid that the data in the data block of its correspondence also are considered to.
The embedded FLASH document storage system of DSP of the present invention is with the form visit FLASH of file, and the deposit position of management data on FLASH manages the FLASH space.Use this document storage system, as long as the user provides filename and file size just can carry out read and write access to the data on the FLASH.When the position of some data spaces changes, document storage system can automatically arrange a suitable position to deposit this data, and needn't arrange its position on FLASH by the user, make the user under the situation of the storage configuration on the FALSH, also can effectively manage data on the FLASH not understanding data space.Therefore, document storage system of the present invention is convenient to be managed the FLASH space, has improved the efficiency of management to the FLASH space, and, make things convenient for the program maintenance and the upgrading in later stage.
In addition, this document storage system only keeps basic file operation such as reading and writing, deletion, removed maintenance for the impracticable parameter of DSP embedded system, as file Time Created, file modification time etc., therefore the algorithm of this system is simple, size of code is few, and travelling speed is fast, more helps guaranteeing the real-time of DSP embedded system.And the size of this system's data block is set to 64Kbytes, and is identical with the data block size of FLASH self, further improved the speed that FLASH reads and writes data.
More than disclosed only be several specific embodiment of the present invention, but the present invention is not limited thereto, any those skilled in the art can think variation, all should drop in protection scope of the present invention.
Claims (6)
1. the embedded FLASH document storage system of DSP is used for the FLASH space is managed, and it is characterized in that, comprising:
Root directory area is in order to the numbering of depositing filename, file size and depositing first data block of respective file data;
The data field, in order to deposit file data, this data field further comprises several equal-sized data blocks;
The file configuration list area is in order to deposit the pointer corresponding relation between the described data block;
The backup root directory area is connected with described root directory area, backs up the content of described root directory area storage, in order to when described root directory area is made mistakes, replaces the data in the described root directory area, and the data in the described root directory area are recovered; And
Backup file configuration list area, be connected with described file configuration list area, back up the content of described file configuration list area storage, in order to when make mistakes in described file configuration list area, replace the data in the described file configuration list area, the data in the described file configuration list area are recovered.
2. the embedded FLASH document storage system of DSP as claimed in claim 1, it is characterized in that, described root directory area is identical with the structure of described backup root directory area, and described root directory area and described backup root directory area include 48 root directorys, and the length of each described root directory is 16bytes.
3. the embedded FLASH document storage system of DSP as claimed in claim 1 is characterized in that, described each data block is pressed address number consecutively from high to low, the corresponding numbering of each data block.
4. as claim 1 or the embedded FLASH document storage system of 3 described DSP, it is characterized in that described data field comprises 48 data blocks, and the size of each data block is 64Kbyte.
5. the embedded FLASH document storage system of DSP as claimed in claim 1, it is characterized in that, described file configuration list area deposit one first verification and, described backup file configuration list area deposit one second verification and, described first verification and equal described file configuration list area and the used data accumulation of described root directory area and low eight bit data, in order to verification file configuration list area and root directory area; Described second verification and equal described backup file configuration list area and the used data accumulation in described backup root directory area and low eight bit data, dispose list area and backup root directory area in order to the verification backup file; When first bad checksum, check second verification and, if second verification and not makeing mistakes, replace data in file configuration list area and the root directory area with the data in backup file configuration table district and the backup root directory area, carry out the data recovery; Otherwise, if second verification and also makeing mistakes is then formatd total system.
6. the embedded FLASH document storage system of DSP as claimed in claim 1 is characterized in that the maximum storage capacity of described system is 3Mbyte.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102013147A CN102103597A (en) | 2009-12-17 | 2009-12-17 | DSP (digital signal processor) embedded FLASH file storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102013147A CN102103597A (en) | 2009-12-17 | 2009-12-17 | DSP (digital signal processor) embedded FLASH file storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102103597A true CN102103597A (en) | 2011-06-22 |
Family
ID=44156374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102013147A Pending CN102103597A (en) | 2009-12-17 | 2009-12-17 | DSP (digital signal processor) embedded FLASH file storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102103597A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407918A (en) * | 2014-11-29 | 2015-03-11 | 中国航空工业集团公司第六三一研究所 | Storage and recovery method for avionics system task data |
| CN105138655A (en) * | 2015-08-31 | 2015-12-09 | 深圳市茁壮网络股份有限公司 | Data storage and reading method and device |
| CN105243071A (en) * | 2014-07-12 | 2016-01-13 | 航天恒星科技有限公司 | Retrievable file access method suitable for no-file system |
| CN106528830A (en) * | 2016-11-16 | 2017-03-22 | 华为技术有限公司 | Method and device for recovering file index catalogue |
| CN111563012A (en) * | 2019-12-27 | 2020-08-21 | 天津津航计算技术研究所 | Software testing method for detecting NORFLASH memory global bit line short-circuit fault |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1466060A (en) * | 2002-06-10 | 2004-01-07 | 三星电子株式会社 | Flash memory file system |
| CN101520787A (en) * | 2008-03-19 | 2009-09-02 | 中国科学院自动化研究所 | Method for storing real-time data |
| CN101546295A (en) * | 2008-03-24 | 2009-09-30 | 上海梅山钢铁股份有限公司 | Method for backing up and restoring data based on computer hard disc partitions |
-
2009
- 2009-12-17 CN CN2009102013147A patent/CN102103597A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1466060A (en) * | 2002-06-10 | 2004-01-07 | 三星电子株式会社 | Flash memory file system |
| CN101520787A (en) * | 2008-03-19 | 2009-09-02 | 中国科学院自动化研究所 | Method for storing real-time data |
| CN101546295A (en) * | 2008-03-24 | 2009-09-30 | 上海梅山钢铁股份有限公司 | Method for backing up and restoring data based on computer hard disc partitions |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105243071A (en) * | 2014-07-12 | 2016-01-13 | 航天恒星科技有限公司 | Retrievable file access method suitable for no-file system |
| CN104407918A (en) * | 2014-11-29 | 2015-03-11 | 中国航空工业集团公司第六三一研究所 | Storage and recovery method for avionics system task data |
| CN104407918B (en) * | 2014-11-29 | 2017-06-27 | 中国航空工业集团公司第六三一研究所 | A kind of preservation of avionics system task data and restoration methods |
| CN105138655A (en) * | 2015-08-31 | 2015-12-09 | 深圳市茁壮网络股份有限公司 | Data storage and reading method and device |
| CN106528830A (en) * | 2016-11-16 | 2017-03-22 | 华为技术有限公司 | Method and device for recovering file index catalogue |
| CN106528830B (en) * | 2016-11-16 | 2019-05-10 | 华为技术有限公司 | A kind of method and apparatus for restoring file index catalogue |
| CN111563012A (en) * | 2019-12-27 | 2020-08-21 | 天津津航计算技术研究所 | Software testing method for detecting NORFLASH memory global bit line short-circuit fault |
| CN111563012B (en) * | 2019-12-27 | 2023-09-26 | 天津津航计算技术研究所 | Software testing method for detecting NORFLASH memory global bit line short-circuit fault |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1493026B (en) | Memory device and record regenerator using it | |
| JP4249267B2 (en) | Freeing up disk space in the file system | |
| CN105760113B (en) | High-speed processing apparatus and file management method based on nand flash memory | |
| CN101968795B (en) | Cache method for file system with changeable data block length | |
| KR102033323B1 (en) | Method for storing metadata of log-structured file system for flash memory | |
| CN101241472B (en) | Mapping management process and system | |
| CN100442247C (en) | Method, system and computer program for data management on storage medium | |
| CN107239526A (en) | File system implementation method, scrap cleaning method, operating position localization method | |
| CN100389406C (en) | Method for operating data in non-volatile storage in embedded system | |
| US10496612B2 (en) | Method for reliable and efficient filesystem metadata conversion | |
| CN102103597A (en) | DSP (digital signal processor) embedded FLASH file storage system | |
| CN101515276A (en) | Method for write operation of file data, and recovery method and recovery system for file data | |
| CN102169460A (en) | Method and device for managing variable length data | |
| CN108399047B (en) | Flash memory file system and data management method thereof | |
| CN101419571A (en) | Method for storing configuration parameter in NOR FLASH based on Hash arithmetic | |
| CN102024060B (en) | Method for memorizing files and restoring error deleted files | |
| CN101983376A (en) | Access device, information recording device, information recording system, file management method, and program | |
| CN101853275A (en) | Data management method of FAT file system and system | |
| CN102541969A (en) | File protection method and system based on file allocation table (FAT) file system, and memory | |
| CN101763426B (en) | Method and device for realizing reliability of file allocation table file system | |
| CN101184155A (en) | Method for storing station name of security receiving chip | |
| KR101114125B1 (en) | Nand Flash File System And Method For Initialization And Crash Recovery Thereof | |
| CN101303667B (en) | Method and device for establishing magnetic disk null cluster table and seeking magnetic disk null cluster | |
| US20060004969A1 (en) | High-speed accessible memory featuring reduced data movement | |
| CN102867019B (en) | Separate type file system and management method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DD01 | Delivery of document by public notice |
Addressee: Visiondigi (Shanghai) Technology Co., Ltd. Cai Wuchu Document name: Notification of Approving Refund |
|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110622 |