CN101908066A - File system management module based on FRAM and Flash - Google Patents
File system management module based on FRAM and Flash Download PDFInfo
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- CN101908066A CN101908066A CN2010102401431A CN201010240143A CN101908066A CN 101908066 A CN101908066 A CN 101908066A CN 2010102401431 A CN2010102401431 A CN 2010102401431A CN 201010240143 A CN201010240143 A CN 201010240143A CN 101908066 A CN101908066 A CN 101908066A
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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
The present invention relates to the embedded file system administration module, especially relate to file system management module based on FRAM and Flash.
Background technology
In the embedding field, traditional file system needs to use the file management system of operating systems such as linux or Wince that file system is managed fully based on the Flash storage.Because the intrinsic characteristics of FLASH (need sector erasing and use to receive a mandate very short, have only 100,000 times), when file is managed, Flash is caused damage, just needing a large amount of storage space circulation memory mechanisms to store the file directory of each file (comprising: the relevant descriptors of file such as read-write pointer, file physical address), make file system management complexity and troublesome maintenance be easy to make mistakes; The reading speed of file reduces simultaneously, and causes the FLASH storage space to waste greatly.
Summary of the invention
The object of the invention is to provide a kind of and is user-friendly to, saves the file system management module based on FRAM and Flash of data space.
For achieving the above object, the present invention can take following technical proposals:
File system management module based on FRAM and Flash of the present invention, it comprises FRAM storer, Flash storer, SPI interface; Described FRAM storer, Flash storer are connected with described SPI interface communication by data bus respectively.
The invention has the advantages that employing with the catalogue file of file system be kept among the FRAM, the content of file leaves this memory mechanism among the Flash in, greatly facilitate user's use and saved data space, the user only need call several simple functions promptly can carry out accessing operation to logarithmic data easily.Because FRAM has unlimited erasing and writing life, and the power down data do not lose, and can reliably preserve the characteristics more than 10 years, adopt catalogue file with file system to be kept at method among the FRAM, have simplified the management of catalogue file.Simultaneously, the user can create a plurality of files, and the function of file has been carried out relevant differentiation, for the user provides very big convenience.The content of file leaves among the Flash, and the data of Flash are also preserving under the situation of power down more than 10 years, and are consistent with the data holding time of FRAM, has guaranteed the reliability of data.While can do relevant verification to file system directories, increase backup functionality in order further to improve the reliability of file system, therefore can get the data of backup area and recover under the situation of primary area inefficacy.The present invention also has following substantive distinguishing features:
1, catalogue file reads 0 time-delay, directly reads from physical address, need not search search;
2,, do not lose because of the intrinsic characteristic of these two kinds of chips (the power down data can effectively be preserved more than 10 years) has guaranteed the data power down, thereby improved the reliability of data owing to adopted FRAM and Flash technology.
3, for the write data mistake, adopted related data to increase the function of verification, prevented that data from makeing mistakes;
4, separately corresponding catalogue of each file can read the data of specified file fast;
5, the management of file uses file ID number to carry out, comprise operations such as establishment, reading and writing;
6, quantity of documents and file size are not limited;
7, simplify the storage of file directory, under the situation of equal data capacity, can increase the valid data amount of user storage effectively, reduced user's cost of products;
8, because what adopt is two kinds of chips that existed at present, thereby produce simple and conveniently, have very big promotional value.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present invention.
Fig. 2 is the circuit theory of Fig. 1.
Embodiment
As shown in Figure 1, 2, the file system management module based on FRAM and Flash of the present invention, it comprises FRAM storer (FM25CL64), Flash storer (AT45DB321), SPI interface (Header8); Described FRAM storer (FM25CL64), Flash storer (AT45DB321) communicate to connect by data bus and described SPI interface (Header8) respectively.Between the supply voltage pin (VCC) of Flash storer (AT45DB321) and common port pin (GND), be electrically connected with the parallel circuit that constitutes by capacitor C 1, C2; Between the operating voltage pin (VDD) of FRAM storer (FM25CL64) and ground voltage pin (VSS), be electrically connected with capacitor C 3.
Claims (1)
1. file system management module based on FRAM and Flash, it is characterized in that: it comprises FRAM storer, Flash storer, SPI interface; Described FRAM storer, Flash storer are connected with described SPI interface communication by data bus respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102401431A CN101908066A (en) | 2010-07-29 | 2010-07-29 | File system management module based on FRAM and Flash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102401431A CN101908066A (en) | 2010-07-29 | 2010-07-29 | File system management module based on FRAM and Flash |
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| CN101908066A true CN101908066A (en) | 2010-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102401431A Pending CN101908066A (en) | 2010-07-29 | 2010-07-29 | File system management module based on FRAM and Flash |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102902748A (en) * | 2012-09-18 | 2013-01-30 | 上海移远通信技术有限公司 | Establishing method and managing method for file systems and random access memory (RAM) and communication chip of file systems |
| WO2013159621A1 (en) * | 2012-04-25 | 2013-10-31 | Tencent Technology (Shenzhen) Company Limited | Method and system for speeding up computer program |
| CN104484289A (en) * | 2014-12-19 | 2015-04-01 | 武汉长江通信智联技术有限公司 | Sector-based embedded system write protection device and method |
| CN104881257A (en) * | 2015-06-09 | 2015-09-02 | 北京世纪铭辰科技有限公司 | Real-time massive data storage system and method |
| CN111694503A (en) * | 2019-03-14 | 2020-09-22 | 成都易联智通信息技术有限公司 | Self-defined file system based on SPI Flash memory |
-
2010
- 2010-07-29 CN CN2010102401431A patent/CN101908066A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013159621A1 (en) * | 2012-04-25 | 2013-10-31 | Tencent Technology (Shenzhen) Company Limited | Method and system for speeding up computer program |
| CN102902748A (en) * | 2012-09-18 | 2013-01-30 | 上海移远通信技术有限公司 | Establishing method and managing method for file systems and random access memory (RAM) and communication chip of file systems |
| CN104484289A (en) * | 2014-12-19 | 2015-04-01 | 武汉长江通信智联技术有限公司 | Sector-based embedded system write protection device and method |
| CN104484289B (en) * | 2014-12-19 | 2017-11-14 | 武汉长江通信智联技术有限公司 | A kind of device and method of the embedded system write-protect based on sector |
| CN104881257A (en) * | 2015-06-09 | 2015-09-02 | 北京世纪铭辰科技有限公司 | Real-time massive data storage system and method |
| CN111694503A (en) * | 2019-03-14 | 2020-09-22 | 成都易联智通信息技术有限公司 | Self-defined file system based on SPI Flash memory |
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Application publication date: 20101208 |