CN104461594B - The upgrade method and device of embedded OS - Google Patents
The upgrade method and device of embedded OS Download PDFInfo
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- CN104461594B CN104461594B CN201310433674.6A CN201310433674A CN104461594B CN 104461594 B CN104461594 B CN 104461594B CN 201310433674 A CN201310433674 A CN 201310433674A CN 104461594 B CN104461594 B CN 104461594B
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Abstract
The invention discloses a kind of upgrade method of embedded OS and devices, in the above-mentioned methods, receive the upgrade file packet from server, and upgrade file packet is stored to default storage region；Embedded OS is restarted, upgrade file packet is obtained from default storage region and integrality and accuracy verification are carried out to upgrade file packet；If verified successfully, updating operation is carried out using upgrade file packet, and shielded disk is written into the data modified during updating operation using the pre-set commands in EWF after the completion of updating operation.The technical solution provided according to the present invention realizes and carries out remote upgrade to embedded device, and updating operation is highly reliable, highly-safe.
Description
Technical field
The present invention relates to built-in fields, in particular to the upgrade method and device of a kind of embedded OS.
Background technique
Currently, the function of remote upgrade is most important for embedded device in the related technology, which can
To significantly simplify the remote maintenance and management difficulty of embedded device.Such as: when embedded device occur software fault (bug) or
When person needs to increase new function, can by network to embedded device program carry out remote upgrade come complete maintenance and it is more newly appointed
Business.
Windows XP Embedded operating system is a kind of embedded OS of Microsoft's research and development, can be by adopting
The function that Windows operating system is customized with the form of modularization, so that embedded development personnel can only select those
Abundant customization characteristic needed for the embedded device of small coverage area.Currently used Windows XP Embedded structure
The embedded device for building operating system increases increasingly, such as: safety monitoring equipment, retail sales point terminal, thin client and
Advanced set-top box etc..
In remote upgrade procedure, Windows XP Embedded behaviour is still either based on based on (SuSE) Linux OS
Make the embedded device of system, the reliability and safety processing in escalation process are both needed to be fully considered, while by
The difference existing for different types of operating system itself, reliability and safety processing of the two in escalation process are also deposited
In biggish difference, however, lacking in the related technology how for the insertion based on Windows XP Embedded operating system
The technical solution of formula equipment progress remote upgrade.
Summary of the invention
The present invention provides a kind of upgrade method of embedded OS and devices, at least to solve to lack in the related technology
Aiming at the problem that the weary technical solution for carrying out remote upgrade the embedded device based on embedded OS.
According to an aspect of the invention, there is provided a kind of upgrade method of embedded OS.
The upgrade method of embedded OS according to the present invention includes: the upgrade file received from server
Packet, and upgrade file packet is stored to default storage region；Embedded OS is restarted, from default memory block
Upgrade file packet is obtained in domain and integrality and accuracy verification are carried out to upgrade file packet；If verified successfully, using liter
Grade file packet carries out updating operation, and using the pre-set commands in enhanced write-in filter (EWF) after the completion of updating operation
Shielded disk is written into the data modified during updating operation.
Preferably, embedded OS is restarted, obtains upgrade file packet simultaneously from default storage region
Carrying out integrality and accuracy verification to upgrade file packet includes: to start remote upgrade while starting embedded OS
Service routine, wherein remote upgrade service routine is preconfigured to be with operation when starting of embedded operation system；Using long-range
Upgrade service Programmable detection whether there is upgrade file packet in default storage region；If it is present to upgrade file packet into
Row integrality and accuracy verification.
Preferably, carrying out updating operation using upgrade file packet includes: using remote upgrade service routine to process list
It is detected, judges whether the embedded main program in embedded OS is currently currently running；If it is, closing insertion
Formula main program；Embedded main program is updated using upgrade file packet.
Preferably, being updated using upgrade file packet to embedded main program includes: to split to upgrade file packet
Processing obtains the first upgrade file set and the second upgrade file set, wherein the first upgrade file set is used for embedded
New data is added in main program, the second upgrade file set is for replacing already existing data in embedded main program
It changes；Embedded main program is updated using the first upgrade file set and the second upgrade file set.
Preferably, above-mentioned embedded OS is Windows XP Embedded operating system.
According to another aspect of the present invention, a kind of update device of embedded OS is provided.
The update device of embedded OS according to the present invention includes: receiving module, for receiving from service
The upgrade file packet of device, and upgrade file packet is stored to default storage region；Correction verification module, for embedded OS
It is restarted, upgrade file packet is obtained from default storage region and integrality and accuracy school is carried out to upgrade file packet
It tests；Upgraded module, if carrying out updating operation using upgrade file packet, and adopt after the completion of updating operation for verifying successfully
Shielded disk is written into the data modified during updating operation with the pre-set commands in EWF.
Preferably, correction verification module includes: start unit, for starting long-range rise while starting embedded OS
Grade service routine, wherein remote upgrade service routine is preconfigured to be with operation when starting of embedded operation system；First inspection
Unit is surveyed, for whether there is upgrade file packet in default storage region using the detection of remote upgrade service routine；Verification is single
Member, for when first detection unit output is is, then carrying out integrality to upgrade file packet and accuracy verifying.
Preferably, upgraded module includes: second detection unit, for using remote upgrade service routine to process list into
Row detection, judges whether the embedded main program in embedded OS is currently currently running；Closing unit, for second
Detection unit output is when being, then to close embedded main program；Updating unit, for using upgrade file packet to embedded main journey
Sequence is updated.
Preferably, updating unit includes: acquisition subelement, for carrying out deconsolidation process to upgrade file packet, obtains first
Upgrade file set and the second upgrade file set, wherein the first upgrade file set into embedded main program for adding
New data, the second upgrade file set is for being replaced already existing data in embedded main program；Subelement is updated,
For being updated using the first upgrade file set and the second upgrade file set to embedded main program.
Preferably, above-mentioned embedded OS is Windows XP Embedded operating system.
Through the invention, using the upgrade file packet received from server, and upgrade file packet is stored to default
Storage region；Embedded OS is restarted, upgrade file packet is obtained from default storage region and to upgrading
File packet carries out integrality and accuracy verification；If verified successfully, updating operation is carried out using upgrade file packet, and rising
Shielded disk is written into the data modified during updating operation using the pre-set commands in EWF after the completion of grade operation,
A reboot operation is executed to protected to embedded system terminal i.e. after receiving the upgrade file packet from server
Disk restored, and the data modified in escalation process are written to being protected by using the pre-set commands of EWF technology
Thus the disk of shield solves the relevant technologies so that it is guaranteed that shielded disk will not be infected by virus in escalation process
It is middle to lack aiming at the problem that embedded device based on embedded OS carries out the technical solution of remote upgrade, and then realize
Remote upgrade is carried out to embedded device, and updating operation is highly reliable, highly-safe.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the upgrade method of embedded OS according to an embodiment of the present invention；
Fig. 2 is that remote upgrade controller according to the preferred embodiment of the invention carries out upgrading control to embedded system terminal
Schematic diagram；
Fig. 3 is inside embedded system terminal according to the preferred embodiment of the invention according to the remote upgrade file received
Packet executes the flow chart of updating operation；
Fig. 4 is the structural block diagram of the update device of embedded OS according to an embodiment of the present invention；
Fig. 5 is the structural block diagram of the update device of embedded OS according to the preferred embodiment of the invention.
Specific embodiment
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in combination with Examples.It should be noted that not conflicting
In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.
In the following description, unless otherwise specified, by with reference to the movement and behaviour executed by one or more computers
The symbol of work indicates to describe present embodiments.Wherein, computer includes personal computer, server, mobile terminal
Etc. various products, used central processing unit (CPU), single-chip microcontroller, digital signal processor (DSP) etc. that there is processing chip to set
It is standby to be properly termed as computer.As such, it will be understood that this kind of movement and operation of sometimes referred to as computer execution include calculating
Manipulation of the processing unit of machine to the electric signal for indicating data with structured form.This manipulation transforms data or in computer
Storage system in position on safeguard it, in terms of this reconfigures or changes in such a way that those skilled in the art understands
The operation of calculation machine.The data structure for safeguarding data is that have the physical bit of the memory of particular community defined in the format of data
It sets.However, although it does not mean restrictive, such as those skilled in the art in the above-mentioned described in the text present invention up and down
What member was understood, the various aspects of movement and operation described below can also be realized with hardware.
Attached drawing is turned to, wherein identical reference label refers to identical element, the principle of the application is illustrated as closing at one
It is realized in suitable calculating environment.It is described below based on the embodiments herein, and is not considered as about herein not
The alternative embodiment that is expressly recited and limit the application.
Following embodiment can be applied in computer, such as: it is applied in personal computer (PC), also can be applied to
It uses in the mobile terminal in intelligent operating system, and is not limited to this at present.For the behaviour of computer or mobile terminal
Making system, there is no particular/special requirements, if it is able to detect contact, determines whether the contact is consistent with pre-defined rule, and according to
The attribute of the contact realizes corresponding function.
Fig. 1 is the flow chart of the upgrade method of embedded OS according to an embodiment of the present invention.As shown in Figure 1, should
Method may include following processing step:
Step S102: the upgrade file packet from server is received, and upgrade file packet is stored to default memory block
Domain；
Step S104: restarting embedded OS, and upgrade file packet is obtained from default storage region
And integrality and accuracy verification are carried out to upgrade file packet；
Step S106: if verified successfully, updating operation is carried out using upgrade file packet, and after the completion of updating operation
Shielded disk is written into the data modified during updating operation using the pre-set commands in EWF.
In the related technology, lack the technical side that remote upgrade is carried out for the embedded device based on embedded OS
Case.Using method as shown in Figure 1, the upgrade file packet from server is received, and upgrade file packet is stored to default
Storage region；Embedded OS is restarted, upgrade file packet is obtained from default storage region and to upgrading
File packet carries out integrality and accuracy verification；If verified successfully, updating operation is carried out using upgrade file packet, and rising
Shielded disk is written into the data modified during updating operation using the pre-set commands in EWF after the completion of grade operation,
A reboot operation is executed to protected to embedded system terminal i.e. after receiving the upgrade file packet from server
Disk restored, and the data modified in escalation process are written to being protected by using the pre-set commands of EWF technology
Thus the disk of shield solves the relevant technologies so that it is guaranteed that shielded disk will not be infected by virus in escalation process
It is middle to lack aiming at the problem that embedded device based on embedded OS carries out the technical solution of remote upgrade, and then realize
Remote upgrade is carried out to embedded device, and updating operation is highly reliable, highly-safe.
Enhanced write-in filter (Enhanced Write Filter, referred to as EWF) protection technique provides a kind of guarantor
Shield disk with prevent write-in means, make operating system (OS) can from read-only media (such as: CD ROM, write-protect are hard
Disk or flash memory) in starting.The write-in all carried out to the disk protected by EWF is all redirected to covering.These write-in quilts
It is buffered in a part in covering and as disk to provide, thus generates the writeable presentation of the disk.Covering is likely to be present in
In disk or random-access memory (RAM), if it is desired, the data that stored in covering can also be submitted to shielded magnetic
Disk.
In a preferred implementation process, above-mentioned embedded OS is Windows XP Embedded operating system.
Windows XP Embedded operating system is the modularization of Windows XP Professional operating system
Windows XP Professional operating system function collection abundant is introduced into embedded device by version.Pass through group
Part function, Windows XP Embedded operating system can be constructed easily only comprising necessary to embedded device
The runtime images of Windows component.In brief, Windows XP Embedded operating system is equivalent to Windows XP
One simple version of Professional operating system.
As a preferred embodiment of the present invention, Fig. 2 is remote upgrade controller according to the preferred embodiment of the invention
The schematic diagram of upgrading control is carried out to embedded system terminal.As shown in Fig. 2, remote upgrade is by remote upgrade controller (phase
When in above-mentioned server) initiate, below by the information exchange between remote upgrade controller and embedded system terminal into
Row detailed description:
Step S202: when remote upgrade controller, which determines, to be needed to carry out remote upgrade to embedded system terminal, firstly,
Upgrade file packet can be sent to embedded system terminal by network by remote upgrade controller；Then, embedded system terminal
The upgrade file packet received is stored into glue file catalogue (i.e. above-mentioned default storage region).
It should be noted that reception and storage to upgrade file packet are by embedded system end in above-mentioned steps
The main program at end is completed.
Step S204: after upgrade file packet is sent embedded system terminal by remote upgrade controller, and then
Can also reset command be sent so that embedded system terminal executes restarting operation.
In the preferred embodiment, the step is primarily to enhance the safety of remote upgrade procedure.It is well known that
Windows operating system existing defects in terms of anti-virus, and Windows XP Embedded operating system is self-contained has
EWF protection technique, and EWF provides a kind of means for protecting disk to prevent from being written, so as to be effectively prevented viral sense
Dye.Under normal conditions, the operating system of embedded device and master program file can all be protected by EWF, and remote upgrade procedure
Meeting carries out file copy to the main program of embedded device and covering operates, and these modified data are utilized EWF technology
Pre-set commands (such as: commit order) submit to shielded disk.If embedded before remote upgrade procedure starts
Equipment virus infection, although virus can't generate any influence to shielded disk due to the protection of EWF technology,
But modified data are submitted to the same of shielded disk by the commit command operation executed in remote upgrade procedure
When also viral data can be submitted to shielded disk.Therefore, to embedded system terminal after receiving upgrade file packet
Executing a reboot operation can be effectively avoided above situation because system reset operation can to shielded disk into
Row restoring operation, to guarantee that shielded disk will not be infected by virus in escalation process.
Preferably, in step S104, embedded OS is restarted, is obtained from default storage region
Upgrade file packet and to upgrade file packet carry out integrality and accuracy verification may include following operation:
Step S1: start remote upgrade service routine while starting embedded OS, wherein remote upgrade clothes
Business program is preconfigured to be with operation when starting of embedded operation system；
Step S2: upgrade file packet whether there is in default storage region using the detection of remote upgrade service routine；
Step S3: if it is present carrying out integrality and accuracy verification to upgrade file packet.
In a preferred embodiment, when embedded system terminal is after receiving upgrade file packet, it will restarting is embedding
Enter formula operating system.Therefore, in order to effectively detect upgrade file packet, to enhance the reliability of remote upgrade operation,
Remote upgrade service routine can be arranged to system service program and register booting self-starting type, be added to starting up
, to start remote upgrade service routine while starting embedded OS.In addition, it is contemplated that in escalation process
Power-off may occur for embedded system terminal or network is disconnected because being abnormal, so as to cause upgrading text is received
There is mistake in part packet, if being verified by integrality and accuracy, discovery check results show upgrade file packet be it is invalid, then can
Upgrade file packet is deleted, without updating operation.
Preferably, in step s 106, carrying out updating operation using upgrade file packet may comprise steps of:
Step S4: process list is detected using remote upgrade service routine, is judged in embedded OS
Whether embedded main program is currently currently running；
Step S5: if it is, closing embedded main program；
Step S6: embedded main program is updated using upgrade file packet.
In a preferred embodiment, due to needing to be updated the embedded main program in embedded OS, however
If embedded main program is currently running, will be unable to execute updating operation to embedded main program.For this purpose, executing
Before updating operation, first process list is detected using remote upgrade service routine, be judged in embedded OS
Embedded main program currently whether be currently running, if it is, closing embedded main program；If it is not, then can directly into
Row updating operation.
Preferably, in step s 6, being updated using upgrade file packet to embedded main program may include following behaviour
Make:
Step S61: deconsolidation process is carried out to upgrade file packet, obtains the first upgrade file set and the second upgrade file collection
Close, wherein the first upgrade file set for adding new data into embedded main program, the second upgrade file set for pair
Already existing data are replaced in embedded main program；
Step S62: embedded main program is carried out more using the first upgrade file set and the second upgrade file set
Newly.
In a preferred embodiment, the data modified in escalation process may include two parts:
First part, the already existing data in current embedded main program, therefore, it is necessary to hold to the partial data
Row covering operation, using the corresponding data split out in upgrade file packet, by data already existing in embedded main program into
Row replacement；
Second part, the not existing data in current embedded main program, therefore, it is necessary to execute to the partial data
Copy function, by the new data direct copying split out in upgrade file packet to embedded main program.
Above-mentioned preferred implementation process is further described below in conjunction with preferred embodiment shown in Fig. 3.
Fig. 3 is inside embedded system terminal according to the preferred embodiment of the invention according to the remote upgrade file received
Packet executes the flow chart of updating operation.As shown in figure 3, the process may include following processing step:
Step S302: embedded system terminal starts embedded OS.
Step S304: embedded system terminal starts remote upgrade service routine.
In the preferred embodiment, according to embedded system terminal above-mentioned after receiving upgrade file packet,
Embedded OS will be restarted.Therefore, in order to effectively detect upgrade file packet, to enhance remote upgrade
Remote upgrade service routine can be arranged to system service program and register booting self-starting type by the reliability of operation,
It is added to starting up.
Step S306: when the operating system starts up, remote upgrade service routine will also start embedded system terminal, remotely
It can be detected after the starting of upgrade service program under glue file catalogue with the presence or absence of upgrade file packet；If it does not exist, then remote upgrade
Service routine stops detection；If it exists, then can integrality to remote upgrade file packet and accuracy verify, risen with determining
The validity of grade file packet, continues to execute step S308.
In the preferred embodiment, validity check mainly considers that embedded system terminal may in escalation process
Power-off can occur or network is disconnected because being abnormal, mistake occur so as to cause upgrade file packet is received, if school
Test upgrade file packet as the result is shown be it is invalid, then will be deleted upgrade file packet, without updating operation.
Step S308: remote upgrade service routine by process list detected with the embedded main program of determination whether
It has been started up, if embedded main program has been started up, continues to execute step S310；Otherwise, according to the preset time interval into
The detection of row duration.
Step S310: embedded system terminal closes embedded main program.
Step S312: for embedded system terminal after closing embedded main program, remote upgrade service routine will be into
Row upgrade file packet fractured operation, and file copy and covering operation are carried out to embedded main program again after the completion of fractionation.
Step S314: embedded system terminal is completed to carry out embedded main program file copy and is covering operation
Afterwards, upgrade file packet is deleted.
Step S316: for embedded system terminal after the replacement operation for completing embedded main program, remote upgrade services journey
Sequence can execute commit command operation using EWF technology and the data modified in escalation process are submitted to shielded disk, from
And data are veritably written in disk, embedded OS is then restarted, what is executed in this step opens again
Dynamic operation mainly in view of the personal preference or personal habits of user, restarting be in order to ensure upgrading after it is embedded
Main program can operate normally, and certainly, user, which also can choose, restarts again after a period of time or use always at present
Embedded main program is without restarting.
It should be noted that due to remote upgrade controller by upgrade file packet be sent to embedded system terminal it
Afterwards, and then can also reset command be sent so that embedded system terminal execution restarting operation, therefore, holds in this step
Viral data will not be written in capable commit command operation, and whole flow process is safe.
Step S318: after the restarting for completing embedded OS, so far, entire remote upgrade procedure is all complete
At.
Fig. 4 is the structural block diagram of the update device of embedded OS according to an embodiment of the present invention.As shown in figure 4,
The update device of the embedded OS may include: receiving module 10, for receiving the upgrade file from server
Packet, and upgrade file packet is stored to default storage region；Correction verification module 20, for being opened again embedded OS
It is dynamic, upgrade file packet is obtained from default storage region and integrality and accuracy verification are carried out to upgrade file packet；Upgrade mould
Block 30, if carrying out updating operation using upgrade file packet, and using in EWF after the completion of updating operation for verifying successfully
Pre-set commands shielded disk is written into the data modified during updating operation.
Using device as shown in Figure 4, solves and lack in the related technology for the insertion based on embedded OS
Formula equipment carries out the problem of technical solution of remote upgrade, and then realizes and carry out remote upgrade to embedded device, and upgrade
Operating reliability is strong, highly-safe.
In a preferred implementation process, above-mentioned embedded OS is Windows XP Embedded operating system.
Preferably, as shown in figure 5, correction verification module 20 may include: start unit 200, in starting embedded operation
Start remote upgrade service routine while system, wherein remote upgrade service routine is preconfigured to be with embedded operation
System is run when starting；First detection unit 202, for being in default storage region using the detection of remote upgrade service routine
It is no that there are upgrade file packets；Verification unit 204, for when first detection unit output is is, then being carried out to upgrade file packet
Integrality and accuracy verification.
Preferably, as shown in figure 5, upgraded module 30 may include: second detection unit 300, for using remote upgrade
Service routine detects process list, judges whether the embedded main program in embedded OS is currently being transported
Row；Closing unit 302, for when second detection unit output is is, then closing embedded main program；Updating unit 304 is used
Embedded main program is updated in using upgrade file packet.
Preferably, updating unit 304 may include: obtain subelement (not shown), for upgrade file packet into
Row deconsolidation process obtains the first upgrade file set and the second upgrade file set, wherein the first upgrade file set be used for
Add new data in embedded main program, the second upgrade file set be used for already existing data in embedded main program into
Row replacement；Subelement (not shown) is updated, for using the first upgrade file set and the second upgrade file set pair
Embedded main program is updated.
It can be seen from the above description that above example implements following technical effect (it should be noted that these
Effect is the effect that certain preferred embodiments can achieve): the present invention provides one kind to grasp for Windows XP Embedded
Make the technical solution of the embedded device remote upgrade of system, entire remote upgrade procedure is simple and effective.It is provided by the present invention
Technical solution take full advantage of the EWF protection technique of Windows XP Embedded operating system, to the number in escalation process
It is strictly controlled according to write-in, to effectively prevent for viral data being written in shielded disk, is enhanced
The safety of remote upgrade.In addition, technical solution provided by the present invention is only from embedded main program by remote upgrade function
It is vertical to come out, be arranged to system service program and register booting self-starting type, can active control upgrading process simultaneously
Handle wherein various abnormal conditions；Remote upgrade service routine also integrality can be carried out to upgrade file packet and accuracy verifies,
To be effectively prevented from since power-off or network may occur for embedded system terminal because being abnormal in escalation process
And caused by disconnecting the problem of receiving invalid upgrade file packet.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
It is performed by computing device in the storage device, and in some cases, it can be to be different from shown in sequence execution herein
Out or description the step of, perhaps they are fabricated to each integrated circuit modules or by them multiple modules or
Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (8)
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| CN106095505A (en) * | 2016-06-13 | 2016-11-09 | 天脉聚源(北京)传媒科技有限公司 | A kind of method and device of software upgrading |
| CN107809324B (en) * | 2016-09-07 | 2022-01-25 | 中兴通讯股份有限公司 | Vehicle-mounted automatic diagnosis system equipment and upgrading method thereof |
| CN107015827B (en) * | 2017-03-20 | 2020-06-16 | 深圳市共进电子股份有限公司 | Embedded system and method for automatically running third-party extension programs |
| CN108897565B (en) * | 2018-06-19 | 2021-06-18 | 深圳市道通智能航空技术股份有限公司 | Software upgrading method and device in electronic equipment and electronic equipment |
| CN110874225B (en) * | 2018-08-29 | 2023-05-02 | 杭州海康威视数字技术股份有限公司 | A data verification method, device, embedded device and storage medium |
| CN110099130B (en) * | 2019-05-15 | 2021-09-28 | 腾讯科技（深圳）有限公司 | Configuration updating method and device and server |
| CN112241271A (en) * | 2019-07-17 | 2021-01-19 | 西安旌旗电子股份有限公司 | A Partial Upgrading Method of Embedded Software |
| CN111625840A (en) * | 2020-05-29 | 2020-09-04 | 杭州海康威视数字技术股份有限公司 | Program checking method, program upgrading method and device |
| CN113204366A (en) * | 2021-06-02 | 2021-08-03 | 上海酒贝乐信息技术有限公司 | Remote upgrading method for intelligent wine selling machine system |
| CN114610358A (en) * | 2022-04-19 | 2022-06-10 | 无锡市恒通电器有限公司 | Calibration method for remote upgrade installation package of single-phase electric energy meter |
| CN116719549B (en) * | 2023-08-02 | 2023-11-28 | 麒麟软件有限公司 | Novel Linux operating system lossless upgrading method |
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