CN106598769A - Method and device for checking EMMC (embedded multi media card) burning file - Google Patents
Method and device for checking EMMC (embedded multi media card) burning file Download PDFInfo
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- CN106598769A CN106598769A CN201611159258.1A CN201611159258A CN106598769A CN 106598769 A CN106598769 A CN 106598769A CN 201611159258 A CN201611159258 A CN 201611159258A CN 106598769 A CN106598769 A CN 106598769A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000005192 partition Methods 0.000 claims abstract description 85
- 238000003860 storage Methods 0.000 claims abstract description 32
- 238000007689 inspection Methods 0.000 claims abstract description 30
- 238000004321 preservation Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 5
- 238000012795 verification Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000003362 replicative effect Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0766—Error or fault reporting or storing
- G06F11/0787—Storage of error reports, e.g. persistent data storage, storage using memory protection
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Storage Device Security (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
Abstract
The embodiment of the invention discloses an EMMC burning file inspection method and a device, wherein the method comprises the following steps: acquiring original partition files of an embedded system, and calculating check values of the original partition files to serve as original check values; the method comprises the steps that a burning file corresponding to the embedded system is stored in burning storage equipment, then target partition files of the stored burning file are obtained, and check values of all the target partition files are calculated and serve as target check values; and checking whether the burning file is correct or not by comparing the original check value with the target check value. The embodiment of the invention can effectively avoid the condition of data damage or loss of the burning file and improve the accuracy of the burning file by comparing the original check value of the embedded system with the target check value of the target partition file stored in the burning storage device and checking whether the burning file is correct.
Description
Technical field
The present embodiments relate to areas of information technology, more particularly to a kind of method and dress of EMMC recordable papers inspection
Put.
Background technology
With the progress of science and technology, packing chip just develops toward miniaturization and densification, therefore the requirement of recordable paper
More and more higher.
In order to improve the efficiency of factory's burn recording software of intellective scheme, need to make EMMC (Embedded Multi
Media Card, embedded non-volatile memory system) burning bin file, during plant produced can before reaching the standard grade burning this
File, and in order to further improve work efficiency, the platform for being automatically bin can have been built, engineer can be in Web page system
One key of upper click makes burning bin file automatically.This process for making burning bin uses the dd orders of linux, EMMC
Content reads out.
But, this process for reading is not tape verifying, it is possible to there is the burning bin file made and there is number
According to situation about damaging or lose, underproof burning bin file is burnt to the batch that chip easily causes the manufacturing side from USB flash disk again
Property is bad.
The content of the invention
The embodiment of the present invention provides a kind of method and device of EMMC recordable papers inspection, it is possible to increase recordable paper is just
True property.
In a first aspect, a kind of method of EMMC recordable papers inspection is embodiments provided, including：
The raw partition file of embedded system is obtained, the check value of each original partitioned file is calculated, as original
Beginning check value；
The corresponding recordable paper of the embedded system obtains the recordable paper of preservation after being saved in burning storage device
Target partition file, calculates the check value of each target partition file, as object identifier value；
By to the original checksums value and the contrast of the object identifier value, checking the recordable paper whether correct.
Second aspect, the embodiment of the present invention additionally provide a kind of device of EMMC recordable papers inspection, including：
Original checksums value acquisition module, for obtaining the raw partition file of embedded system, calculates each original described
The check value of partitioned file, as original checksums value；
Object identifier value acquisition module, is saved in burning storage device for the corresponding recordable paper of the embedded system
The target partition file of the recordable paper of preservation is obtained afterwards, calculates the check value of each target partition file, as target
Check value；
Recordable paper inspection module, for by the original checksums value and the contrast of the object identifier value, checking
Whether the recordable paper is correct.
A kind of method of EMMC recordable papers inspection is embodiments provided, by comparing the original of embedded system
Whether check value and the object identifier value for being saved in target partition file after burning storage device, inspection recordable paper are correct, energy
The situation that recordable paper has corrupted data or loss is prevented effectively from enough, to improve the accuracy of recordable paper.
Description of the drawings
Figure 1A is a kind of flow chart of the EMMC recordable papers method of inspection in the embodiment of the present invention one；
Figure 1B is a kind of flow chart of the EMMC recordable papers method of inspection in the embodiment of the present invention one；
Fig. 2 is a kind of flow chart of the EMMC recordable papers method of inspection in the embodiment of the present invention two；
Fig. 3 is a kind of structure chart of the EMMC recordable papers verifying attachment in the embodiment of the present invention three；
Fig. 4 is a kind of structure chart of the EMMC recordable papers verifying attachment in the embodiment of the present invention four.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.
Embodiment one
Figure 1A is a kind of flow chart of EMMC recordable papers method of inspection that the embodiment of the present invention one is provided, and the present embodiment can
Suitable for the situation of the operating system for possessing multi partition, the method can be examined by EMMC recordable papers provided in an embodiment of the present invention
Experiment device performing, can be realized by the way of software and/or hardware by the device, and the device can be integrated in any offer EMMC and burn
In the equipment of record inspection of document function, as shown in Figure 1A, specifically include：
S110, the raw partition file for obtaining embedded system, calculate the check value of each original partitioned file, make
For original checksums value.
Wherein, embedded system is that one kind is completely embedded into inside controlled device, is the dedicated computing that application-specific is designed
Machine system, for the system for controlling or monitoring the large-scale equipments such as machine, device, factory.EMMC belongs to a kind of embedded system
System, comprising multiple raw partition regions, respective raw partition file is contained in each raw partition region, and each is original
Partitioned file all corresponds to different functions, and such as data subregions are used for data storage.Obtaining the raw partition text of embedded system
After part, the check value of each raw partition file is calculated, as original checksums value.Wherein, check value is with a kind of calculation specified
The value that method is calculated to raw partition file.The method of data check has a lot, including even-odd check method, BCC (Block
Check Character, exclusive or check method) check addition or CRC (Cyclic Redundancy Check, cyclic redundancy school
Test) check addition etc..And the purpose of data check is the integrity to ensure raw partition file, that is, ensure the integrity of data.
S120, the corresponding recordable paper of the embedded system obtain the burning text of preservation after being saved in burning storage device
The target partition file of part, calculates the check value of each target partition file, as object identifier value.
Wherein, burning can be understood as replicating, as the thing in computer is replicated on other document carrier, burning
File is that file is saved in burning storage device using cd-rom recorder or writing card, and recordable paper refers to software installation here
Bag, for carrying out system installation to embedded device.Wherein, burning storage device can select USB flash disk, mobile device or CD
Deng for storing software installation bag.Specifically, embedded system corresponding recordable paper is saved in after burning storage device,
The target partition file of the recordable paper of preservation can be obtained in burning storage device, each target partition file is then calculated
Check value, as object identifier value.
S130, by the contrast to the original checksums value and the object identifier value, whether check the recordable paper
Correctly.
Specifically, by contrasting with object identifier value to original checksums value, obtain whether recordable paper is correctly tied
By.For example, if burning storage device is USB flash disk, the corresponding recordable paper of embedded system is BIN (binary, binary system text
Part) form file, then make BIN formatted file burnings when, first each partitioned file in BIN formatted files is entered
Row is calculated check value, used as original checksums value.Then, system can be saved in BIN formatted files in USB flash disk, then, in U
The file of the BIN forms of preservation can be obtained in disk, and after the target partition file in BIN formatted files are obtained, is calculated
The check value of each target partition file, as object identifier value.Finally, by original checksums value and object identifier value carry out it is right
Than, you can whether correct obtain the BIN formatted files burning.
The embodiment of the present invention is by comparing the original checksums value of embedded system and being saved in target after burning storage device
Whether the object identifier value of partitioned file, check the recordable paper correct, and in solving prior art, recordable paper has number
According to the problem damaged or lose, the accuracy and integrity of recordable paper are improve.
In addition, by the original checksums value of embedded system and the target for being saved in target partition file after burning storage device
Check value is contrasted, if the original checksums value is consistent with the object identifier value, shows corresponding target partition file
Correctly；Otherwise, then show corresponding target partition file error.Also, when target partition file error, user can select
Again preserve the target partition file, it is also possible to select to preserve again the corresponding whole recordable paper of embedded system, concrete mistake
Journey is as shown in Figure 1B.
Embodiment two
A kind of flow chart of EMMC recordable papers method of inspection that Fig. 2 is provided for the embodiment of the present invention two, the present embodiment exist
It is optimized on the basis of above-described embodiment, there is provided the raw partition file of the acquisition embedded system of optimization, calculates each
The check value of the original partitioned file, protects as original checksums value recordable paper corresponding with the embedded system of optimization
The target partition file of the recordable paper of preservation is obtained after being stored to burning storage device, each target partition file is calculated
Check value, as the processing method of object identifier value, specifically：Obtain the raw partition of the preset critical subregion of embedded system
File, calculates the CRC check value of the raw partition file, as original checksums value；By the subregion of the preset critical subregion
Name writes original checksums file with corresponding original checksums value, and the original checksums file is saved in the embedded system
Unite corresponding recordable paper.After the corresponding recordable paper of the embedded system copies burning storage device to, will be described original
Verification file is individually saved in the burning storage device；It is successively read the target of the preset critical subregion of the recordable paper
Partitioned file, and the CRC check value of the target partition file is calculated, as object identifier value；It is described by described original
Whether check value and the contrast of the object identifier value, check the recordable paper correct, specially：By original checksums text
In part folder, the original checksums value that records is corresponding with calculated object identifier value is contrasted, and whether the inspection recordable paper
Correctly.
Accordingly, the method for the present embodiment includes：
The raw partition file of S210, the preset critical subregion of acquisition embedded system, calculates the raw partition file
CRC check value, as original checksums value.
Specifically, as each the raw partition file in embedded system corresponds to different functions, and original point
Area immobilizes, as long as therefore certain subregion contains corrupted data, i.e., the function that certain can be affected a part of.User can be according to non-
Certain function of normal operation, detects the raw partition file that there may exist problem in embedded system.Also, will damage
Or the subregion of system worked well after loss of data, can be affected to be referred to as crucial subregion.Therefore, user in inspection recordable paper is
When no correct, it is not necessary that all raw partition files of embedded system are investigated, can be in compiling embedded system
When, the path of the crucial subregion of default inspection is input into, the raw partition file of the crucial subregion of embedded system is obtained, and is counted
The CRC check value of original partitioned file in crucial subregion is calculated, as original checksums value.Wherein, during CRC check method is the communications field
Conventional debugging method of calibration.
S220, by the zone name of the preset critical subregion and corresponding original checksums value write original checksums file,
The original checksums file is saved in into the corresponding recordable paper of the embedded system.
Specifically, when embedded system is compiled, the zone name of preset critical subregion is write with corresponding original checksums value
Enter in original checksums file, and original checksums file is saved in into the corresponding recordable paper of embedded system.
After S230, the corresponding recordable paper of the embedded system copy burning storage device to, by the original checksums
File is individually saved in the burning storage device.
Specifically, after original checksums file is set up, copy embedded system corresponding recordable paper to burning and deposit
While storage equipment, also need the original checksums file of foundation is individually saved in the burning storage device.Wherein, original school
File is tested for preserving the zone name of preset critical subregion and the information of corresponding original checksums value, and by embedded system
Corresponding recordable paper copies burning storage device to and can adopt img file compression formats.
S240, be successively read the recordable paper preset critical subregion target partition file, and calculate the target
The CRC check value of partitioned file, as object identifier value.
Specifically, in burning storage device, the recordable paper to copying is decompressed, and is successively read preset critical point
The target partition file in area, calculates the CRC check value of the target partition file, as object identifier value.
S250, will be the original checksums value recorded in the original checksums file corresponding with calculated object identifier value
Contrasted, check the recordable paper whether correct.
For example, above-mentioned burning storage device is USB flash disk, and the corresponding recordable paper of embedded system is the file of BIN forms, that
When BIN formatted file burnings are made, first the preset critical partitioned file in BIN formatted files is carried out being calculated school
Value is tested, as original checksums value, the zone name of preset critical partitioned file and corresponding original checksums is piled up into original school
Test in file, then the original checksums file is saved in the recordable paper of BIN forms.Then, system can be BIN forms text
Part is saved in USB flash disk, is successively read the target partition file of the preset critical subregion of BIN form recordable papers, and is calculated target
The CRC check value of partitioned file, as object identifier value.Finally, by the original checksums value recorded in original checksums file with
Calculated object identifier value is contrasted, you can whether correct obtain the BIN formatted files burning.
The present embodiment by obtain embedded system preset critical subregion raw partition file original checksums value with
Whether the object identifier value checking file burning of the target partition file of the preset critical subregion of recordable paper is correct, effectively saves
The time of recordable paper inspection, improve checkability.
Embodiment three
A kind of structural representation of EMMC recordable papers verifying attachment that Fig. 3 is provided for the embodiment of the present invention three, this enforcement
Example is applicable to the situation of the operating system for possessing multi partition, and the method can be by EMMC burnings provided in an embodiment of the present invention text
Performing, the device can realize by the way of software and/or hardware that the device can be integrated in any offer to part verifying attachment
In the equipment of EMMC recordable paper checking functions, as shown in figure 3, specifically including：Original checksums value acquisition module 31, object identifier
Value acquisition module 32 and recordable paper inspection module 33.
Original checksums value acquisition module 31, for obtaining the raw partition file of embedded system, calculates each original institute
The check value of partitioned file is stated, as original checksums value；
Object identifier value acquisition module 32, is saved in burning storage for the corresponding recordable paper of the embedded system and sets
The standby rear target partition file for obtaining the recordable paper for preserving, calculates the check value of each target partition file, as mesh
Mark check value；
Recordable paper inspection module 33, for by the original checksums value and the contrast of the object identifier value, examining
The recordable paper is tested whether correct.
EMMC recordable papers verifying attachment described in the present embodiment is used to perform the EMMC burnings text described in the various embodiments described above
The part method of inspection, its know-why are similar with the technique effect for producing, and repeat no more here.
Example IV
Fig. 4 show a kind of structural representation of the device of EMMC recordable papers method of inspection of the offer of the embodiment of the present invention four
Figure.As shown in Figure 4：
On the basis of above-described embodiment, the original checksums value acquisition module 31 specifically for：Obtain embedded system
Preset critical subregion raw partition file, calculate the CRC check value of the raw partition file, as original checksums value；
The zone name of the preset critical subregion is write into original checksums file with corresponding original checksums value, by the original checksums
File is saved in the corresponding recordable paper of the embedded system.
On the basis of above-described embodiment, the object identifier value acquisition module 32 specifically for：The embedded system
After corresponding recordable paper copies burning storage device to, the original checksums file is individually saved in into the burning storage
Equipment；The target partition file of the preset critical subregion of the recordable paper is successively read, and calculates the target partition file
CRC check value, as object identifier value；The recordable paper inspection module 33 specifically for：By the original checksums file
The original checksums value recorded in folder is corresponding with calculated object identifier value to be contrasted, and whether just to check the recordable paper
Really.
On the basis of above-described embodiment, the recordable paper inspection module 33 is specially：By the original checksums value with
The object identifier value is contrasted；It is if the original checksums value is consistent with the object identifier value, corresponding described
Target partition file is correct；Otherwise, the corresponding target partition file error.
On the basis of above-described embodiment, also include：Recordable paper preserving module 41 again.
Recordable paper preserving module 41 again, if for the target partition file error, preserving again the target
Partitioned file, or, preserve again the corresponding recordable paper of the embedded system.
Described in the present embodiment, the device of EMMC recordable papers inspection is used to perform the EMMC burnings described in the various embodiments described above
The method of the inspection of document, its know-why are similar with the technique effect for producing, and repeat no more here.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although the present invention is carried out by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
More other Equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. a kind of method that EMMC recordable papers are checked, it is characterised in that include：
The raw partition file of embedded system is obtained, the check value of each original partitioned file is calculated, as original school
Test value；
The corresponding recordable paper of the embedded system obtains the target of the recordable paper of preservation after being saved in burning storage device
Partitioned file, calculates the check value of each target partition file, as object identifier value；
By to the original checksums value and the contrast of the object identifier value, checking the recordable paper whether correct.
2. method according to claim 1, it is characterised in that the raw partition file of the acquisition embedded system, meter
The check value of each original partitioned file is calculated, as original checksums value, including：
The raw partition file of the preset critical subregion of embedded system is obtained, the CRC check of the raw partition file is calculated
Value, as original checksums value；
The zone name of the preset critical subregion is write into original checksums file with corresponding original checksums value, will be described original
Verification file is saved in the corresponding recordable paper of the embedded system.
3. method according to claim 2, it is characterised in that the corresponding recordable paper of the embedded system is saved in burning
The target partition file of the recordable paper of preservation is obtained after address book stored equipment, the verification of each target partition file is calculated
Value, as object identifier value, including：
After the corresponding recordable paper of the embedded system copies burning storage device to, will be the original checksums file independent
It is saved in the burning storage device；
The target partition file of the preset critical subregion of the recordable paper is successively read, and calculates the target partition file
CRC check value, as object identifier value；
Whether correctly the contrast by the original checksums value and the object identifier value, check the recordable paper,
Specially：
Contrasted the original checksums value recorded in the original checksums file corresponding with calculated object identifier value,
Check the recordable paper whether correct.
4. method according to claim 1, it is characterised in that described by the original checksums value and the target school
The contrast of value is tested, checks the recordable paper whether correct, specially：
Contrasted the original checksums value corresponding with the object identifier value；If the original checksums value and the target school
Test value consistent, then the corresponding target partition file is correct；Otherwise, the corresponding target partition file error.
5. method according to claim 4, it is characterised in that also include：
If the target partition file error, the target partition file is preserved again, or, preserve again described embedded
The corresponding recordable paper of system.
6. the device that a kind of EMMC recordable papers are checked, it is characterised in that include：
Original checksums value acquisition module, for obtaining the raw partition file of embedded system, calculates each original subregion
The check value of file, as original checksums value；
Object identifier value acquisition module, obtains after being saved in burning storage device for the corresponding recordable paper of the embedded system
Go bail for the target partition file of the recordable paper deposited, calculate the check value of each target partition file, as object identifier
Value；
Recordable paper inspection module, for by the original checksums value and the contrast of the object identifier value, checking described
Whether recordable paper is correct.
7. device according to claim 6, it is characterised in that the original checksums value acquisition module specifically for：
The raw partition file of the preset critical subregion of embedded system is obtained, the CRC check of the raw partition file is calculated
Value, as original checksums value；
The zone name of the preset critical subregion is write into original checksums file with corresponding original checksums value, will be described original
Verification file is saved in the corresponding recordable paper of the embedded system.
8. device according to claim 7, it is characterised in that the object identifier value acquisition module specifically for：
After the corresponding recordable paper of the embedded system copies burning storage device to, will be the original checksums file independent
It is saved in the burning storage device；
The target partition file of the preset critical subregion of the recordable paper is successively read, and calculates the target partition file
CRC check value, as object identifier value；
The recordable paper inspection module specifically for：
Contrasted the original checksums value recorded in the original checksums file corresponding with calculated object identifier value,
Check the recordable paper whether correct.
9. device according to claim 4, it is characterised in that the recordable paper inspection module is specially：
Contrasted the original checksums value corresponding with the object identifier value；If the original checksums value and the target school
Test value consistent, then the corresponding target partition file is correct；Otherwise, the corresponding target partition file error.
10. device according to claim 9, it is characterised in that also include：
Recordable paper preserving module again, if for the target partition file error, preserving again the target partition text
Part, or, preserve again the corresponding recordable paper of the embedded system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611159258.1A CN106598769A (en) | 2016-12-15 | 2016-12-15 | Method and device for checking EMMC (embedded multi media card) burning file |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611159258.1A CN106598769A (en) | 2016-12-15 | 2016-12-15 | Method and device for checking EMMC (embedded multi media card) burning file |
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| CN106598769A true CN106598769A (en) | 2017-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611159258.1A Pending CN106598769A (en) | 2016-12-15 | 2016-12-15 | Method and device for checking EMMC (embedded multi media card) burning file |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112486514A (en) * | 2020-11-27 | 2021-03-12 | 广州视源电子科技股份有限公司 | Method and device for manufacturing eMMC burning file and computer equipment |
| CN112667431A (en) * | 2020-12-23 | 2021-04-16 | 江西兴泰科技有限公司 | Method for calibrating waveform data of electronic price tag |
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| US20130246854A1 (en) * | 2012-03-19 | 2013-09-19 | Hon Hai Precision Industry Co., Ltd. | Wireless communication check system and method |
| CN105068829A (en) * | 2015-07-28 | 2015-11-18 | 深圳Tcl数字技术有限公司 | Feature data burning method, apparatus and system |
| CN105243042A (en) * | 2015-09-30 | 2016-01-13 | 广东小天才科技有限公司 | Data burning method and data burning device |
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2016
- 2016-12-15 CN CN201611159258.1A patent/CN106598769A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130246854A1 (en) * | 2012-03-19 | 2013-09-19 | Hon Hai Precision Industry Co., Ltd. | Wireless communication check system and method |
| CN105068829A (en) * | 2015-07-28 | 2015-11-18 | 深圳Tcl数字技术有限公司 | Feature data burning method, apparatus and system |
| CN105243042A (en) * | 2015-09-30 | 2016-01-13 | 广东小天才科技有限公司 | Data burning method and data burning device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112486514A (en) * | 2020-11-27 | 2021-03-12 | 广州视源电子科技股份有限公司 | Method and device for manufacturing eMMC burning file and computer equipment |
| CN112486514B (en) * | 2020-11-27 | 2024-01-16 | 广州视源电子科技股份有限公司 | Manufacturing method and device of eMMC burning file and computer equipment |
| CN112667431A (en) * | 2020-12-23 | 2021-04-16 | 江西兴泰科技有限公司 | Method for calibrating waveform data of electronic price tag |
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Application publication date: 20170426 |