CN109308267A - The control method and storage device control system of the storage device of drive recorder - Google Patents
The control method and storage device control system of the storage device of drive recorder Download PDFInfo
- Publication number
- CN109308267A CN109308267A CN201710628404.9A CN201710628404A CN109308267A CN 109308267 A CN109308267 A CN 109308267A CN 201710628404 A CN201710628404 A CN 201710628404A CN 109308267 A CN109308267 A CN 109308267A
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- Prior art keywords
- storage device
- archives
- allocation list
- data
- catalog table
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
- G06F12/0223—User address space allocation, e.g. contiguous or non contiguous base addressing
- G06F12/023—Free address space management
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0841—Registering performance data
- G07C5/085—Registering performance data using electronic data carriers
- G07C5/0866—Registering performance data using electronic data carriers the electronic data carrier being a digital video recorder in combination with video camera
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
A kind of control method and storage device control device of the storage device of drive recorder.The control method of the storage device of drive recorder plans an archives catalog table of a storage device the following steps are included: according to the default archives catalog table for being stored in a storage element.According to the default archival location allocation list for being stored in the storage element, an archival location allocation list of the storage device is planned.According to the archives catalog table and the archival location allocation list, controls a controller and write data in the storage device.
Description
Technical field
The invention relates to a kind of control method and control systems, and in particular to a kind of storage of drive recorder
The control method and storage device control system of cryopreservation device.
Background technique
File system is a kind of system for managing archives in storage device (such as SD card, hard disk etc.), with effective percentage
Ground accesses (conduct) storage device.Archival location allocation list (File Allocation Table, FAT) system is a kind of common
File system.
Fig. 1 is please referred to, the schematic diagram of the existing storage device 900 using FAT file system is painted.Storage device 900
Including 920, one archives catalog table of an archival location allocation list (File-Allocation-Table) (Directory Entry)
930 and several data fields (data cluster) 940.It is same after being repeatedly written and deleting files by taking drive recorder as an example
The data of archives may disperse to be stored in discontinuous data field 940.For example, as shown in Figure 1, archives FA is stored in volume
Number for " 13 ", " 14 ", " 15 ", " 19 ", " 20 " data field 940 in.
Archives catalog table 930 is used to record the filename being stored in storage device 900 and initial data area numbers, archives
Position allocation list 920 is then used to the chain junction relationship of recorded data zone.For example, as shown in Figure 1, archives catalog table 930 is pointed out
An archives FA is stored in storage device 900, the data storage of archives FA is in the data field 940 that number is " 13 ".Archive bit
Setting the position in allocation list 920 corresponding to the data field 940 that number is " 13 " records " 14 ", points out that archives FA is next
Data storage is in the data field 940 that number is " 14 "；Correspond to the data field that number is " 14 " in archival location allocation list 920
940 position records " 15 ", point out the next data storage of archives FA in the data field 940 that number is " 15 ", according to this
Analogize；Reference numeral is that the position of the data field 940 of " 20 " records " EOC " in archival location allocation list 920, points out to number
Data field 940 for " 20 " is the shelves tail (End Of Cluster-Chain, EOC) of archives FA.
Referring to figure 2. and Fig. 3, Fig. 2 be painted existing drive recorder archives wiring method flow chart, Fig. 3 is painted root
According to the exemplary diagram of the storage device 900 of the operation of Fig. 2.For example, after the video recording program of starting drive recorder, storage dress
Portion can be replicated to dynamic random access memory (Dynamic Random by setting the archival location allocation list 920 in 900
Access Memory, (DRAM)) in (step S901).Then, storage device is judged according to the archival location allocation list in DRAM
Enough (step S902) whether 900 storage space.If storage device 900 there are enough storage spaces, a data can be selected
Data (such as number be " 16 " data field) (step S903) is written as a starting data field for area, and in archives catalog table
Increase the number (such as " 16 ") (step S904) of a filename (such as " FB ") and a starting data field in 930 newly.Then, it selects
Another data field is written data (such as number be " 17 " data field) (step S905), and by the number (example of the data field
Such as " 17 ") it is recorded in the archival location allocation list in DRAM, the position (step corresponding to the data field that number is " 16 "
S906), the data field (step S907) is then write data into, and so on, until archives write-in program terminates.In addition,
When archival location allocation list in DRAM is updated a specific times (such as three times), according to the archival location allocation list in DRAM
The archival location allocation list 920 in storage device 900 is updated, until archives write-in program terminates.In archives write-in program knot
Shu Hou, drive recorder can update the archival location in storage device 900 again according to the archival location allocation list in DRAM
Allocation list 920.
However, accident power-off caused by traffic accident, may result in the archives due to a lack of complete data-link junction relationship
(FAT chain) and can not be read.For example, as shown in figure 3, the data as archives FB have been written into the number that number is " 29 "
According to accident power-off is suffered from behind area 940, since the archival location allocation list 920 in storage device 900 is not yet according in DRAM
Archival location allocation list updates so that the data-link junction relationship of archives FB is imperfect, archives FB be stored in number be " 22 " with "
The data of 29 " data field can not be read.For drive recorder, it is quite serious that data when traffic accident, which can not be read,
The problem of.
Summary of the invention
Present invention is directed to a kind of control method of the storage device of drive recorder and storage device control system,
Using according to default archival location allocation list (Predetermined File-Allocation-Table) and a default archives
Catalogue listing (Predetermined Directory Entry) plans storage device, avoids archives can not because of accident power-off
It reads.
According to an aspect of the invention, it is proposed that a kind of control method of the storage device of drive recorder.Drive recorder
Storage device control method the following steps are included: according to the default archives catalog table for being stored in a storage element
(Predetermined File-Allocation-Table) plans an archives catalog table of a storage device.According to being stored in
The default archival location allocation list (Predetermined Directory Entry) of the storage element plans that the storage fills
The archival location allocation list set.According to the archives catalog table and the archival location allocation list, controls a controller and data are written
Into the storage device.
According to another aspect of the invention, it is proposed that a kind of storage device control system.Storage device control system includes one
Storage element, a controller and a processor.One default archives catalog table (Predetermined of storage element storage
Directory Entry) and default archival location allocation list (Predetermined File-Allocation-Table).
The controller is to write data in a storage device.The processor is to execute the following steps: according to the default archives mesh
Table is recorded, plans an archives catalog table of the storage device；According to the default archival location allocation list, the one of the storage device is planned
Archival location allocation list；And it according to the archives catalog table and the archival location allocation list, controls the controller and writes data to
In the storage device.
More preferably understand to have to above-mentioned and other aspect of the invention, special embodiment below, and cooperates institute's attached drawing
Detailed description are as follows for formula:
Detailed description of the invention
Fig. 1 is painted the schematic diagram of the existing storage device using FAT file system.
Fig. 2 is painted the flow chart of the archives wiring method of existing drive recorder.
Fig. 3 is painted the exemplary diagram of the storage device of operation according to fig. 2.
Fig. 4 is schematically shown as the block diagram of control system depicted in an embodiment according to the present invention.
Fig. 5 is the flow chart of an embodiment of the control method of the storage device of drive recorder of the present invention.
Fig. 6 is the signal of an embodiment of the storage device of profile catalogue listing of the present invention and archival location allocation list
Figure.
Fig. 7 is the flow chart for the embodiment that the present invention writes data to storage device.
Fig. 8 is painted the exemplary diagram of the storage device of the operation according to Fig. 7.
Symbol description
100: control system
110: storage element
120: controller
130: processor
200: video camera
400: storage device
420: archival location allocation list
430: archives catalog table
440: data field
900: storage device
920: archival location allocation list
930: archives catalog table
940: data field
FA, FB, FC, FD, FE: archives
S501~S503, S704~S707, S901~S908: step
Specific embodiment
Storage device in view of traditional drive recorder has problems urgently to improve, a kind of driving note set forth below
The control method and storage device control system for recording the storage device of device utilize a default archives catalog table
(Predetermined Directory Entry) and default archival location allocation list (Predetermined File-
Allocation-Table the archival location allocation list and archives catalog table of storage device are planned), avoids archives because unexpected disconnected
Electricity and can not read.
Fig. 4 is the block diagram of the control system 100 according to depicted in one embodiment of the invention.Control system 100 is, for example,
One control chip.In the present embodiment, control system 100 is connected to a video camera 200, a storage device 400.Control system
100 for example may be disposed at a drive recorder with video camera 200.Storage device 400 e.g. a SD memory card or a hard disk, can
Inside set or be external in the drive recorder.Control system 100 includes a storage element 110, a controller 120 and a processor
130.Storage element 110 is to store a default archives catalog table and a default archival location allocation list.Controller 120 is to write
Enter data into storage device 400.An archives catalog table and an archival location of the processor 130 to plan storage device 400
Allocation list.
Fig. 5 is the flow chart of an embodiment of the control method of the storage device of drive recorder of the present invention.In this implementation
In example, whenever starting drive recorder, or whenever replacing storage device 400, processor 130 can check storage device 400
In whether have archives catalog table and archival location allocation list (step S501).If nothing, processor 130 is directly according to storage element
Default archives catalog table and default archival location allocation list in 110, plan the archives catalog table and archives in storage element 110
Position allocation list (step S503)；If so, processor 130 then further checks archives catalog table and shelves in storage device 400
Case position allocation list, and if (the step identical as default archival location allocation list of the default archives catalog table in storage element 110
S502).If it is different, processor 130 is then directly according to default archives catalog table and the default archive bit in storage element 110
Allocation list is set, plans default archives catalog table and default archival location allocation list (step S503) in storage element 110.
Fig. 6 is showing for profile catalogue listing of the present invention and an embodiment of the storage device 400 of archival location allocation list
It is intended to.Storage device 400 includes the archival location allocation list 420 planned according to a default archival location allocation list, basis
The archives catalog table 430 and several data fields (data cluster) 440 that one default archives catalog table is planned.
As shown in fig. 6, processor 130 has planned the shelves name " FC " for corresponding to an archives in archives catalog table 430, and corresponding
It is the data field that number is " 11 " in the initial data area of archives FC, processor 130 has more been planned in archival location allocation list 420
Data-link junction relationship corresponding to archives FC is the data field that number is " 11 "~" 15 ".Similarly, processor 130 has planned shelves
Initial data area in case catalogue listing 430 corresponding to the shelves name " FD " of an archives and archives FD is the data field that number is " 16 ",
Processor 130 more planned in archival location allocation list 420 corresponding to archives FD data-link junction relationship be number be " 16 "~"
20 " data field.
In brief, the data of archives FC are predetermined the data field for being placed on that number is " 11 "~" 15 ", the data of archives FD
It is predetermined the data field for being placed on that number is " 16 "~" 20 ".It is worth noting that, although archives catalog table 430 and archival location are matched
Set table 420 and planning be completed, but in storage device 400 correspond to archives FC, archives FD data field (that is, number be " 11 "
The data field of~" 20 ") in, there is no the data that storage corresponds to archives FC, archives FD, as shown in Figure 6.
Fig. 7 is the flow chart for the embodiment that the present invention writes data to storage device 400.In the present embodiment, it handles
Device 130 controls controller 120 and writes data to the storage device according to archives catalog table 430 and archival location allocation list 420
In 400.
For example, drive recorder start video recording when, processor 130 according to archives catalog table 430 select an archives come
It is written data (step S704).In one embodiment, the filename in archives catalog table 430 is with temporal information, therefore handles
Device 130 can select an oldest archives that data are written according to the filename in archives catalog table 430.By taking Fig. 6 as an example, shelves
Case FC is an oldest archives.
Then, processor 130 changes in archives catalog table 430 the shelves name (step S705) for corresponding to the archives.Example is held,
Processor 130 will correspond in archives catalog table 430 to be selected by processor 130 the shelves name " FC " of the archives of data is written and changes
For " FE ", as shown in Figure 8.It is worth noting that, the initial data area corresponding to archives FE maintains in archives catalog table 430
It is constant and still be number be " 11 " data field.In addition, the data-link in archival location allocation list 420, corresponding to archives FE
Junction relationship remains unchanged and is still the data field that number is " 11 "~" 15 ".
Then, the control of processor 130 controller 130, which writes data in storage device 400, plans to the data of the archives
Area (step S706).Example is held, processor 130 controls controller 130, data are sequentially written to the number in storage device 400
For the data field of " 11 "~" 15 ", as shown in Figure 8.
Then, processor 130 judges whether to continue to write to data (step S707).If continuing to write to data, repeat to walk
Rapid S704~S706；If not continuing to write to data, terminate this process.
From the foregoing, it will be observed that processor 130 not will be updated archival location allocation list during writing data to storage device 300
420, so the data for corresponding to an archives in archival location allocation list 420 chain even if drive recorder meets with accident power-off
Relationship can still be kept completely, and the data of the archives can completely be read in storage device 300.
In addition, in the prior art, processor need to spend the data field of time searching blank that data are written.Through excessive
Secondary write-in and after deleting files, the data field of blank is often scattered (fragment), therefore reduces and write a grade efficiency.It compares
The data field of archives has been planned and will not have been changed in the prior art, the present invention, therefore processor is not required to that the time is spent to search
The data field of blank improves data are written and writes a grade efficiency (writing performance).In one embodiment, archives
Data field can be planned as continuous (as shown in Figure 6), can further be promoted and write a grade efficiency.
In addition, in the prior art, whether processor needs confirmation remaining space enough before data are written.If insufficient, place
Reason device, which need to delete files, corresponds to shelves name and the initial data area of an at least archives in catalogue listing, and the position allocation list that deletes files
In correspond to the data-link junction relationships of an at least archives, therefore reduce and write a grade efficiency.Compared to the prior art, place of the present invention
Manage device 110 before data be writtens need not confirmation remaining space it is whether enough, filename in the catalogue listing that need not also delete files and
Data-link junction relationship in initial data area and archival location allocation list can be promoted further and write a grade efficiency.
In conclusion although the present invention has been disclosed by way of example above, it is not intended to limit the present invention..Institute of the present invention
Belong in technical field and have usually intellectual, without departing from the spirit and scope of the present invention, when various change and profit can be made
Decorations.Therefore, protection scope of the present invention is subject to claim.
Claims (14)
1. a kind of control method of the storage device of drive recorder, comprising:
According to the default archives catalog table for being stored in a storage element, an archives catalog table of a storage device is planned；
According to the default archival location allocation list for being stored in the storage element, the archival location configuration of the storage device is planned
Table；And
According to the archives catalog table and the archival location allocation list, controls a controller and write data in the storage device.
2. the control method of the storage device of drive recorder as described in claim 1, which is characterized in that plan that the storage fills
The step of archives catalog table set, includes:
Plan one grade of name for corresponding to an archives in the archives catalog table.
3. the control method of the storage device of drive recorder as claimed in claim 2, which is characterized in that plan that the storage fills
The step of archives catalog table set, includes:
Plan the starting data field in the archives catalog table corresponding to the archives.
4. the control method of the storage device of drive recorder as claimed in claim 3, which is characterized in that plan that the storage fills
The step of archival location allocation list set, includes:
Plan the data-link junction relationship for corresponding to the archives in the archival location allocation list.
5. the control method of the storage device of drive recorder as claimed in claim 4, which is characterized in that according to the archive bit
Allocation list and the archives catalog table are set, controlling the step of controller writes data to the storage device includes:
It changes in the archives catalog table and corresponds to this grade of name of the archives；And
Control the controller write data in the storage device plan to the archives data field.
6. the control method of the storage device of drive recorder as claimed in claim 5, which is characterized in that the archives catalog table
In correspond to the archives the initial data area remain unchanged.
7. the control method of the storage device of drive recorder as claimed in claim 6, which is characterized in that the archival location is matched
The data-link junction relationship in table corresponding to the archives is set to remain unchanged.
8. a kind of storage device control system, comprising:
One storage element, one default archives catalog table of storage and a default archival location allocation list；
One controller, to write data in a storage device；And
One processor, to execute the following steps:
According to the default archives catalog table, an archives catalog table of the storage device is planned；
According to the default archival location allocation list, an archival location allocation list of the storage device is planned；And
According to the archives catalog table and the archival location allocation list, controls the controller and write data in the storage device.
9. storage device control system as claimed in claim 8, which is characterized in that plan the archives catalog of the storage device
Table includes:
Plan one grade of name for corresponding to an archives in the archives catalog table.
10. storage device control system as claimed in claim 9, which is characterized in that plan the archives mesh of the storage device
Record table includes:
Plan the starting data field in the archives catalog table corresponding to the archives.
11. storage device control system as claimed in claim 10, which is characterized in that plan the archive bit of the storage device
Setting allocation list includes:
Plan the data-link junction relationship for corresponding to the archives in the archival location allocation list.
12. storage device control system as claimed in claim 11, which is characterized in that according to the archival location allocation list and be somebody's turn to do
Archives catalog table, controls the controller and writes data in the storage device and include:
It changes in the archives catalog table and corresponds to this grade of name of the archives；And
Control the controller write data in the storage device plan to the archives data field.
13. storage device control system as claimed in claim 12, which is characterized in that correspond to the shelves in the archives catalog table
The initial data area of case remains unchanged.
14. storage device control system as claimed in claim 13, which is characterized in that correspond in the archival location allocation list
The data-link junction relationship of the archives remains unchanged.
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| CN109308267B (en) | 2021-12-03 |
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Address after: 361006 1501, zone a, innovation building, software park, Xiamen Torch High tech Zone, Xiamen, Fujian Applicant after: Xingchen Technology Co.,Ltd. Address before: 361006 1501, zone a, innovation building, software park, Xiamen Torch High tech Zone, Xiamen, Fujian Applicant before: Xiamen Xingchen Technology Co.,Ltd. Address after: 361006 1501, zone a, innovation building, software park, Xiamen Torch High tech Zone, Xiamen, Fujian Applicant after: Xiamen Xingchen Technology Co.,Ltd. Address before: 361006 1501, zone a, innovation building, software park, Xiamen Torch High tech Zone, Xiamen, Fujian Applicant before: Xiamen Xingchen Technology Co.,Ltd. |
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