CN108664578A - A kind of file cycle storage method and system - Google Patents

Abstract

The invention discloses a file circulation storage method and system. The system includes: a host computer, FPGA, a timing module and a data storage module. The data storage module includes a ROM storage unit and a FLASH storage unit; the ROM storage unit storage unit is divided into a configuration area and address area, the FLASH storage unit is divided into data area and free area, the configuration area is used to store the configuration information of the data storage module, the address area is used to store the starting block address of the user file; the data area is used to store the user file; the free area Used to store date information. The present invention obtains the file date information list by acquiring the file date information, reads the starting block address of user file storage in the file date information list, and can determine the required user file address according to the starting block address corresponding to the date information The storage location realizes the visual and selective reading of user data while realizing circular storage records.

Description

A file storage method and system

technical field

The invention relates to the technical field of file management, in particular to a file circular storage method and system.

Background technique

With the rapid development of modern science and technology, the storage and reading of large-capacity data has been widely used in many fields such as aerospace, surveying, and medical treatment. In the actual environment, people always hope to use a large amount of data to better study the relationship between data, or to find problems in time through data comparison so as to avoid possible problems, and then provide directness in future design practice. experience of. Therefore, the research on large-capacity storage has never stopped.

In scientific research and industrial production, more and more dynamic information needs to be processed, and the amount of data to be studied is also increasing. Correspondingly, the storage capacity, storage speed, and reading speed and reading method of the memory It also puts forward higher requirements. At this time, the file processing system that is directly related to the reading speed is extremely important.

In terms of the application field of data acquisition and storage, according to the resource environment of the system, the file system is roughly divided into the file circular storage system based on the operating system and the file circular storage system without the operating system. The file circulation storage system without an operating system is suitable for storage devices with relatively simple functions and strong specialization. This kind of file management has strong flexibility, and its functions can be modified accordingly according to different application environments, so as to achieve the purpose of achieving optimal performance with minimum cost.

Nowadays, file circular storage methods for storage are changing with each passing day. But in general, most of the existing file circular storage methods are to reserve several blocks in the NAND FLASH data area, and these blocks are used to store the index information of the file. The index information generally includes the total number of files, file size, file update time, The file stores the specific information of some user files such as the first and last addresses, and performs operations such as timely updating of this information. Finally, the visual reading of user data is realized by reading the index information list through the host computer. However, since this kind of file circular storage method needs to open up a certain amount of memory to store index information, and each time the data is stored, the files in the index area need to be updated. Operations such as erasing and writing to blocks reserved for storing file information will cause the loss of block storage space in this part to not be well balanced.

Contents of the invention

In view of the deficiencies in the prior art, one of the purposes of the present invention is to provide a file circular storage method that is simple and effective and can effectively manage large-capacity data.

A file circular storage method, the method comprising:

The FPGA receives the write date information request sent by the host computer, obtains the initial block address of this storage from the address area of the ROM storage unit according to the write date information request, obtains the date information from the timing module, and writes the obtained date information into The free area of the FLASH storage unit;

The FPGA receives the write user file request sent by the upper computer, obtains the initial block address of this storage from the address area of the ROM storage unit according to the write user file request, and writes the user file according to the acquired initial block address Write the data area of FLASH storage unit in order; Wherein, when the data area of described FLASH storage unit is filled up, erase the data of wherein first storage block and continue to circulate write from first storage block;

The FPGA receives the file date information request sent by the upper computer, and reads the file date information from the free area of the FLASH storage unit according to the read file date information request;

The host computer analyzes and organizes the read file date information to obtain a file date information list;

The host computer finds the date information and the starting block address of the required user file from the file information list, and reads from the data area of the FLASH storage unit according to the date information and the starting block address of the user file found user files.

As a further improvement of the present invention, the FPGA writes the first address information of the FLASH storage unit into the address area of the ROM storage unit before receiving the write file date information request sent by the host computer for the first time;

After the user file is written into the data area of the FLASH storage unit in sequence for the Nth time (N is an integer greater than or equal to 1), the FPGA updates the address of the address area of the ROM storage unit to the start of the N+1th data storage block address.

As a further improvement of the present invention, the method further includes: writing configuration information of the ROM storage unit and the FLASH storage unit into the configuration area of the ROM storage unit.

As a further improvement of the present invention, the configuration information includes at least the capacity of the ROM storage unit and the FLASH storage unit, the capacity of the configuration area, the starting address of the configuration area, the capacity of the address area, the starting address of the address area, the capacity of the data area, the starting address of the data area The starting address, the number of bytes of a complete frame structure, the frame structure table, and the sampling control rate.

As a further improvement of the present invention, the user file data is sequentially written into the data area of the FLASH storage unit according to the obtained starting block address, specifically including:

When writing a block, judge whether the storage space of the next block is empty, if so, after erasing the data of the next block, write the user files into the data area of the FLASH storage unit in order, otherwise, directly write the user file data Write the data area of the FLASH storage unit in sequence.

As a further improvement of the present invention, when receiving the stop recording command sent by the host computer or suddenly losing power, the power module provides power to finish writing the user files cached in the data area of the FLASH storage unit and update the address area of the ROM storage unit address information.

As a further improvement of the present invention, reading the user file from the data area of the FLASH storage unit according to the date information and the starting block address of the found user file specifically includes: when reading a block, judging whether it is Last block, if so, then stop reading after reading this block; Otherwise, after reading this block, continue to read next block; The first block continues to be written.

The second object of the present invention is to provide a file circulation storage system that is simple and effective and can effectively manage large-capacity data.

A file circulation storage system, the system includes: including: a host computer, FPGA, timing module and data storage module, the data storage module includes a ROM storage unit and a FLASH storage unit;

The ROM storage unit storage unit is divided into a configuration area and an address area, and the FLASH storage unit is divided into a data area and a free area, the configuration area is used to store configuration information of the data storage module, and the address area is used for storing the starting block address of user files; the data area is used to store user files; the free area is used to store date information;

The host computer is used to send a write date information request to the FPGA;

Described FPGA is used for receiving described write date information request, according to described write date information request, obtains the starting block address of this storage from described address area, obtains date information from timing module, and writes the date information obtained In the corresponding page of the free area;

The timing module is used to provide date information;

The host computer is also used to send a write user file request to the FPGA;

The FPGA is also used to receive a request for writing a user file, obtain the initial block address of this storage from the address area according to the request for writing a user file, and write the user file in order according to the acquired initial block address. the data area;

The FPGA is also used for erasing the data of the first storage block wherein the first storage block is continuously written in a cycle when the data area of the FLASH storage unit is full;

The host computer is also used to send a request for reading file date information to the FPGA;

The FPGA is also used to receive the file read date information request, and read the date information from the free area according to the file read date information request;

The host computer is also used to analyze and arrange the read date information to obtain a file date information list;

The host computer is also used to find the date information and start block address of the required user file from the file date information list, and read the user file from the data area according to the date information and start block address of the user file found .

As a further improvement of the present invention, said FPGA is also used for:

Before receiving the write file date information request sent by the host computer for the first time, write the first address information of the FLASH storage unit into the address area of the ROM storage unit;

After the user file is written into the data area of the FLASH storage unit in sequence for the Nth (N is an integer greater than or equal to 1) time, update the address of the address area of the ROM storage unit to the starting block of the N+1th data storage address.

As a further improvement of the present invention, the system also includes: a power supply module, used to provide electric energy to finish writing the user files cached in the data area of the FLASH storage unit and The address information in the address area of the ROM memory unit is updated.

Beneficial effects of the present invention:

The present invention uses the FLASH data area to store user files, uses the FLASH free area to store file date information, uses the ROM configuration area to store configuration information, uses the ROM address area to store the initial block address of the user file, and obtains the free area file Date information, get the user file information list, read the block start address of the user file storage in the file information list, and determine the storage location of the required user file according to the start address corresponding to the date information, so as to realize the upper computer Visual selective reading of user data.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a schematic diagram of a file circular storage method in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a FLASH storage unit in an embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

As shown in Figure 1, in the embodiment of the present invention, the method includes the following steps:

Step S110, the FPGA receives the write date information request sent by the host computer, obtains the initial block address of this storage from the address area of the ROM storage unit according to the write date information request, obtains the date information from the timing module, and writes the obtained date The information is written into the free area of the FLASH storage unit;

Wherein, the date information is stored in each page of each block corresponding to the user data. The free area where the obtained date address is written is the free area corresponding to the obtained start block address; the time service module is a GPS time service module, and the format of the date information is year, month, day, hour, minute, second, millisecond, year occupies 11 bits, and month occupies 4 bits , the day occupies 5 bits, the hour occupies 5 bits, the minute occupies 6 bits, the second occupies 6 bits, the millisecond occupies 6 bits, and the date information written on each page of the free area occupies 43 bits, that is, it occupies up to six bytes.

Preferably, before performing step S110 for the first time, the following steps are also included:

Writing the configuration information of the ROM storage unit and the FLASH storage unit into the configuration area of the ROM storage unit;

Specifically, the configuration information includes the capacity of the ROM storage unit and the FLASH storage unit, the capacity of the configuration area, the start address of the configuration area, the capacity of the address area, the start address of the address area, the capacity of the data area, the start address of the data area, a complete Frame structure bytes, frame structure table, etc.

Preferably, before performing step S110 for the first time, the following steps are also included:

The FPGA writes the first address information of the FLASH storage unit into the address area of the ROM storage unit.

Among them, since the obtained file information list contains the starting block address of the user file storage, but the first address of the user file is not stored in the free area, it is required to write back the first address information of the data storage to in the file list.

Step S120, the FPGA receives the write user file request sent by the host computer, obtains the start block address of this storage from the address area of the ROM storage unit according to the write user file request, and according to the obtained start block address Write user files in order to the data area of the FLASH storage unit; wherein, when the data area of the FLASH storage unit is full, erase the data of the first storage block and continue to write in a loop from the first storage block;

Preferably, after each user file is written, if the storage space of the block is not full, the next data storage after power-off will be directly written from the next block. When the data area is full of data and needs to be written cyclically, due to the characteristics of writing by page and erasing by block with non-flash memory, the user file in the data area and the date file in the free area will be erased together. When it is time, it is only necessary to write the date information of the file correspondingly, and there is no need for an additional design program to update the information.

Wherein, after the user file is written into the data area of the FLASH storage unit in sequence for the Nth (N is an integer greater than or equal to 1) time, the FPGA updates the address of the address area of the ROM storage unit to the address of the N+1th data storage The starting block address.

Wherein, the user file data is written into the data area of the FLASH storage unit in order according to the starting block address obtained, specifically including: when writing a block, judging whether the storage space of the next block is empty, if so, then After erasing the data of the next block, write the user files into the data area of the FLASH storage unit in order, otherwise, directly write the user file data into the data area of the FLASH storage unit in order.

Step S130, the FPGA receives the file date information request sent by the host computer, and reads the file date information from the free area of the FLASH storage unit according to the file read date information request;

Step S140, the host computer analyzes and organizes the read file date information to obtain a list of file date information;

Among them, the file date information list is composed of the start time and end time of writing user files, and the first address of data storage.

Step S150, the host computer finds the date information and the starting block address of the required user file from the file information list, and according to the date information and the starting block address of the user file found, the data of the FLASH storage unit is area to read user files.

Wherein, reading the user file from the data area of the FLASH storage unit according to the date information and the starting block address of the user file found, specifically includes: when reading a block, judging whether it is the last block, if so, Then stop reading after reading the block; otherwise, continue reading the next block after reading the block. When the data area of the FLASH storage unit is full, erase the data of the first block and continue writing from the first block.

Preferably, the method also includes the following steps:

When receiving a command to stop recording from the host computer or a sudden power failure, the power module provides power to write the user files cached in the data area of the FLASH storage unit and update the address information in the address area of the ROM storage unit. The address information includes a start block address.

Preferably, the FLASH storage unit is a NAND FLASH mass memory.

The present invention also includes a file circulation storage system, which includes: a host computer, FPGA, a timing module and a data storage module, and the data storage module includes a ROM storage unit and a FLASH storage unit.

ROM storage unit The storage unit is divided into a configuration area and an address area, the configuration area is used to store the configuration information of the data storage module, and the address area is used to store the initial block address of the user file;

As shown in Figure 2, the FLASH storage unit includes several blocks, each block includes several pages, and each page includes a data area and a free area, the data area is used to store user files, and the free area is used to store date information.

The host computer is used to send a request for writing date information to the FPGA; the timing module is used to provide date information;

The FPGA is used to receive the write date information request, obtain the starting block address of this storage from the address area according to the above write date information request, obtain the date information from the timing module, and write the obtained date information into the corresponding page of the free area middle;

Wherein, the date information is stored in each page of each block corresponding to the user data. The free area where the obtained date address is written is the free area corresponding to the obtained start block address; the time service module is a GPS time service module, and the format of the date information is year, month, day, hour, minute, second, millisecond, year occupies 11 bits, and month occupies 4 bits , the day occupies 5 bits, the hour occupies 5 bits, the minute occupies 6 bits, the second occupies 6 bits, the millisecond occupies 6 bits, and the date information written on each page of the free area occupies 43 bits, that is, it occupies up to six bytes.

The host computer is also used to send a request to write user files to the FPGA;

The FPGA is also used to receive a request for writing a user file, obtain the initial block address of this storage from the address area according to the above-mentioned write user file request, and write the user file into the data area in order according to the obtained initial block address;

Wherein, the user file data is written into the data area in order according to the starting block address obtained, specifically including: when writing a block, judging whether the storage space of the next block is empty, and if so, erasing the next block After the block data, write the user file into the data area of the FLASH storage unit in order, otherwise, directly write the user file data into the data area of the FLASH storage unit in order.

Preferably, after each user file is written, if the storage space of the block is not full, the next data storage after power-off will be directly written from the next block. When the data area is full of data and needs to be written cyclically, due to the characteristics of writing by page and erasing by block with non-flash memory, the user file in the data area and the date file in the free area will be erased together. When it is time, it is only necessary to write the date information of the file correspondingly, and there is no need for an additional design program to update the information.

The FPGA is also used to erase the data of the first storage block in the data area and continue to cycle write from the first storage block when the data area is full;

The host computer is also used to send a request for reading file date information to the FPGA;

The FPGA is also used to receive the above-mentioned read file date information request, and read the date information from the free area according to the above-mentioned read file date information request;

The upper computer is also used to analyze and organize the read date information to obtain a list of file date information;

Among them, the file date information list is composed of the start time and end time of writing user files, and the first address of data storage.

The host computer is also used to find the date information and initial block address of the desired user file from the above-mentioned file date information list, and read the user file from the data area according to the date information and initial block address of the user file found.

Wherein, reading the user file from the data area of the FLASH storage unit according to the date information and the starting block address of the user file found, specifically includes: when reading a block, judging whether it is the last block, if so, Then stop reading after reading the block; otherwise, continue reading the next block after reading the block.

Preferably, FPGA is also used for:

Before receiving the write date information request sent by the host computer for the first time, write the first address information of the FLASH storage unit into the address area of the ROM storage unit.

Among them, since the obtained file information list contains the starting block address of the user file storage, but the first address of the user file is not stored in the free area, it is required to write back the first address information of the data storage to in the file list.

After the user file is written into the data area of the FLASH storage unit in sequence for the Nth time (N is an integer greater than or equal to 1), the FPGA updates the address of the address area of the ROM storage unit to the start of the N+1th data storage block address.

Preferably, the system also includes a power supply module, which is used to provide power to finish writing the user files cached in the data area of the FLASH storage unit and update the ROM storage when receiving a stop recording command sent by the host computer or a sudden power failure. Address information in the address area of the unit.

Preferably, the FLASH storage unit is a NAND FLASH mass memory.

Beneficial effects of the present invention:

(1) The present invention stores the user file by utilizing the FLASH data area, utilizes the FLASH idle area to store the file date information, utilizes the ROM configuration area to store the configuration information, utilizes the ROM address area to store the starting block address of the user file, and obtains Free area file date information, get the user file information list, read the block start address of user file storage in the file information list, and determine the storage location of the required user file according to the start address corresponding to the date information, thereby Realize the visual and selective reading of user data by the host computer.

(2) When the FLASH data area is full, erase the data of the first storage block and continue to write circularly from the first storage block, which can realize circular storage and recording.

The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention shall be determined by the claims.

Claims (10)

1. a kind of file cycle storage method, which is characterized in that including：

FPGA receives the date information of writing that host computer is sent and asks, and date information request is write from ROM bit cell according to described Address area obtains the starting block address of this storage, obtains date information from time service module, and the date information of acquisition is written The free area of FLASH storage units；

The FPGA receives the user file of writing that host computer is sent and asks, and asks to deposit from the ROM according to the user file of writing The address area of storage unit obtain this storage starting block address, and according to the starting block address of acquisition by user file in order The data field of FLASH storage units is written；Wherein, when the data field of the FLASH storage units writes full, erasing is wherein first The data of memory block continue cycling through write-in from first memory block；

The FPGA receives the reading file date information request that host computer is sent, according to the reading file date information request from Read file date information in the free area of FLASH storage units；

The host computer carries out analysis and arrangement to the file date information of reading, obtains file date information list；

The host computer finds the date information and starting block address of required user file, and root from the fileinfo list According to the date information and starting block address of the user file found user's text is read from the data field of the FLASH storage units Part.

2. file cycle storage method as described in claim 1, which is characterized in that further include：Host computer hair is being received for the first time Before the written document date information request sent, the ground of ROM bit cell is written in the first address information of FLASH storage units by FPGA Location area；

N (N be more than or equal to 1 integer) is secondary the data field of FLASH storage units is written into user file in order after, The address of the address area of ROM bit cell is updated to the starting block address of the N+1 times data storage by FPGA.

3. file cycle storage method as described in claim 1, which is characterized in that further include：By ROM bit cell and The configuring area of the configuration information write-in ROM bit cell of FLASH storage units.

4. file cycle storage method as claimed in claim 3, which is characterized in that the configuration information is deposited including at least ROM Storage unit and the capacity of FLASH storage units, configuring area capacity, configuring area initial address, address area capacity, address area starting point Location, data field capacity, data field initial address, a complete frame structure byte number, frame structure table, controlling of sampling rate.

5. file cycle storage method as described in claim 1, which is characterized in that described and starting block address according to acquisition The data field that user file data are written to FLASH storage units in order, specifically includes：

When writing a block, judge whether next piece of memory space is empty, if so, after the data of next piece of erasing, will be used The data field of FLASH storage units is written in family file in order, otherwise, FLASH is directly written in user file data in order The data field of storage unit.

6. file cycle storage method as described in claim 1, which is characterized in that further include：When receive host computer transmission When stop recording order or unexpected power down, power module provides the user that electric energy will cache in the data field of FLASH storage units File writes and updates the address information in the address area of ROM bit cell.

7. file cycle storage method as described in claim 1, which is characterized in that described and according to the user file found Date information and starting block address read user file from the data field of the FLASH storage units, specifically include：When reading one When block, judge whether it is last block, if so, stopping reading after running through the block；Otherwise, after running through the block, continue Read next piece.

8. a kind of file recycles storage system, which is characterized in that including：Host computer, FPGA, time service module and data store mould Block, the data memory module include ROM bit cell and FLASH storage units；

The ROM bit cell storage unit is divided into configuring area and address area, and the FLASH storage units are divided into data field and sky Not busy area, the configuring area are used to store the configuration information of the data memory module, and described address area is for storing user file Starting block address；The data field is for storing user file；The free area is for storing date information；

The host computer is used to write date information request to FPGA transmissions；

The FPGA is asked for receiving the date information of writing, and date information request is write from the acquisition of described address area according to described The starting block address of this storage obtains date information from time service module, and the free area is written in the date information of acquisition Correspondence page in；

The time service module is used to provide date information to the FPGA；

The host computer is additionally operable to write user file request to FPGA transmissions；

The FPGA, which is additionally operable to receive, writes user file request, asks to obtain this from described address area according to the user file of writing The starting block address of secondary storage, and user file is written according to the starting block address of acquisition by the data field in order；

The FPGA is additionally operable to when the data field of the FLASH storage units writes full, wipes the data of wherein first memory block Write-in is continued cycling through from first memory block；

The host computer, which is additionally operable to send to the FPGA, reads file date information request；

The FPGA is additionally operable to receive the reading file date information request, according to the reading file date information request from described Read date information in free area；

The host computer is additionally operable to carry out analysis and arrangement to the date information of reading, obtains file date information list；

The host computer is additionally operable to find the date information and starting block of required user file from the file date information list User file is read in address according to the date information of the user file found and starting block address from the data field.

9. file as claimed in claim 8 recycles storage system, which is characterized in that the FPGA is additionally operable to：

Before receiving the written document date information request that host computer is sent for the first time, by the first address information of FLASH storage units The address area of ROM bit cell is written；

N (N be more than or equal to 1 integer) is secondary the data field of FLASH storage units is written into user file in order after, The address of the address area of ROM bit cell is updated to the starting block address of the N+1 times data storage.

10. file as claimed in claim 8 recycles storage system, which is characterized in that further include：Power module, for when receipts When the stop recording order sent to host computer or unexpected power down, providing electric energy will cache in the data field of FLASH storage units User file write and update the address information in the address area of ROM bit cell.