CN103135735B - Power down protection control method and system - Google Patents
Power down protection control method and system Download PDFInfo
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- CN103135735B CN103135735B CN201110382102.0A CN201110382102A CN103135735B CN 103135735 B CN103135735 B CN 103135735B CN 201110382102 A CN201110382102 A CN 201110382102A CN 103135735 B CN103135735 B CN 103135735B
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Abstract
The invention discloses a method and a system of power down protection control. If the system judges that the main power supply powers off, a power down mark is positioned, and site data is stored through power supplied by a backup power supply. The site data comprises power down data, a current process mark and a power down mark. The system restores the system through the stored site data. The method and the system of the power down protection control solve the problem of incomplete machine data due to sudden power down of the machine.
Description
Technical field
The present invention relates to data protection and recover field and in particular to a kind of control method of power down protection and system.
Background technology
Under the overall background of national " golden tax project ", in the past few years tax-control cash register, network are all being promoted successively in all parts of the country
The tax-controlling devices such as billing machine, are beaten and electronic management with the machine realizing invoice issuing.Such product is related to state tax revenue, to machine
In interior data, ic card, the integrality of data, printing invoice data etc. has very strict requirements.The national standard of tax-control cash register
Also clear stipulaties need to carry out power down protection the controlling cashier power-cut-off contiuous printing and it needs to realize invoice to invoice data, tax-control data.Tax control
Cashing machine is a complicated embedded computer system, realizes the safety of data by the tax control ic card of filling AES
Storage and the control of authority of making out an invoice, the related business operation of tax control is required for mutually being verified with ic card and just can complete, and needs
Want ic card that data is digitally signed.So, all of tax control business operation be required for carrying out power down protection it is ensured that machine with
The uniformity of data and integrality in ic card.Network billing machine is a class derived product of tax-control cash register, and it does not use tax control
Ic card, and realize the security controls such as data encryption, signature using usbkey.
From the aforegoing it can be seen that the tax control implement such as tax-control cash register, network billing machine is distributed, is imported in invoice, invoice start,
Produced data in the business procedures such as data declaration, needs the encryption through tax control ic card or usbkey built-in algorithms or label
Name, data needs are each in tax control implement and ic card/usbkey simultaneously stores portion.In the event of system in these business procedures
Suddenly power down, if the technical scheme of the perfect protection of neither one and recovery is it is easy to machine and ic card (or usbkey)
The inconsistent situation of middle data, or lead to machine data imperfect.
Content of the invention
The technical problem to be solved is to provide a kind of control method of power down protection and system, to solve machine
The unexpected power down of device leads to the incomplete problem of machine data.
In order to solve the above problems, the invention provides a kind of control method of power down protection, comprising:
If system judges main power source power down, set power down identifies, and carries out storage scene by the power supply of stand-by power supply
Data, described field data includes the data of power down, active procedure mark and power down mark；
System passes through the described field data of storage, and system is recovered.
Further, said method may also include that described active procedure mark includes current main procedure mark and this main mistake
The subprocess mark having completed in journey.
Further, said method may also include that described system passes through the described field data of storage, system is carried out extensive
Multiple step, comprising:
Described system reads the described field data of storage, if judging power down mark set.Then extract described scene number
According to the subprocess mark having completed in the data of middle power down, current main procedure mark and this main procedure, execute this currently main mistake
The subprocess not completed in journey, after complete paired systems are recovered, removes power down mark.
Further, after said method may also include that described system completes to store field data and power down mark, also include
Turn off the power supply of stand-by power supply.
Present invention also offers a kind of control system of power down protection, comprising: main control module, memory module and standby electricity
Source module, wherein,
Described main control module, if for judging main power source power down, set power down identifies, and passes through described stand-by power supply
The power supply of module carries out storing field data；By the described field data of storage, system is recovered；
Described memory module, for storing field data, described field data includes the data of power down, active procedure mark
Know and power down mark；
Described standby power supply module, for providing the electric energy needed for power down protection process.
Further, said system may also include that active procedure mark described in the field data that described memory module stores
Know the subprocess mark including having completed in current main procedure mark and this main procedure.
Further, said system may also include that described main control module passes through the described field data of storage, to system
Recovered, referred to:
Described main control module reads the described field data of storage, if judging power down mark set.Then extract described
The subprocess mark having completed in the data of power down, current main procedure mark and this main procedure in field data, execution is deserved
The subprocess not completed in front main procedure, after complete paired systems are recovered, removes power down mark.
Further, said system may also include that described main control module, is additionally operable to complete to store field data and power down
After mark, turn off the power supply of stand-by power supply.
Further, said system may also include that described standby power supply module is capacity cell.
Compared with prior art, apply the present invention, solve the unexpected power down of machine and lead to the incomplete problem of machine data.
The control method of the present invention not only achieves the power-down data protection of tax control business well and start recovers it is ensured that business is grasped
The integrality made and the uniformity of machine card data are moreover it is possible to realize the controlling cashier power-cut-off contiuous printing of invoice well.The method realize simple, can
Lean on, there is stronger versatility simultaneously, can apply and similar need to do in data and the system of process protection at other.
Brief description
Fig. 1 is the flow chart of the control method of power down protection of the present invention.
Fig. 2 is the structural representation of the control system of power down protection of the present invention.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and detailed description.
The method of the present invention can be used for the power down protection of tax-controlling device, but is not limited to tax control field it can also be used to other classes
As need power-down data protection and recover system (for example need scene protection with start recover embedded system) in.Should
Control method is made up of two large divisions: power down protection process and start recovery process.Power down protection process, is to occur to break in system
When electric trigger power-fail interrupt, backup battery provide short time power-on time in it would be desirable to protection field data data
Store in nonvolatile storage such as flash, turn off backup battery afterwards.Start recovery process, is during system boot
The power down mark of detection power down memory block and field data, field data (the power-off scene position according to the storage of power down protection process
Put, critical data etc.), jump to power-off scene critical data and continue executing with, so that there is the process operation data of power down
Can recover and normally be finished it is ensured that the integrality of data manipulation.If there is power down again in recovery process, can be again
Execution protection process, i.e. this mechanism support multilayer nest protection.Start recovery process is finished backed off after random, continues normal startup
System.
The control method of the present invention not only achieve well tax control business power-down data protection and start recover it is ensured that
The uniformity of the integrality of business operation and machine card data is moreover it is possible to realize the controlling cashier power-cut-off contiuous printing of invoice well.The method is realized
Simply, reliable, there is stronger versatility simultaneously, can apply and similar need to do the system of data and process protection at other
In.
As shown in figure 1, a kind of control method of power down protection of the present invention, comprising:
If step 110, system judge main power source power down, set power down identifies, and is carried out by the power supply of stand-by power supply
Storage field data, described field data includes the data of power down, active procedure mark and power down mark；
Described active procedure mark includes the subprocess mark having completed in current main procedure mark and this main procedure, its
In a main procedure may include multiple subprocess.
The main procedure big business operation of correspondence, such as initialization, invoice distribution, invoice importing, invoice issuing, declare, pay taxes
It is then that main procedure implements step and further segments Deng, subprocess.One main procedure comprises multiple subprocess, each height
Process is a minimum atomic operation.So-called atomic operation is exactly that it executes once being necessary for completely terminating, and does not allow
It is interrupted.One section of operation being surrounded by " pass power-fail interrupt " and " opening power-fail interrupt " a pair of operation is exactly atomic operation.By
This is visible, just can respond power-fail interrupt between each subprocess of one main procedure of composition.For ensureing the real-time of interrupt response,
Atomic operation is more short better.
The data of described power down is critical data, i.e. input data needed for residing main procedure.
Step 120, system pass through the described field data of storage, and system is recovered.
Described system passes through the described field data of storage, the step that system is recovered, comprising:
Described system reads the described field data of storage, if judging power down mark set.Then extract described scene number
According to the subprocess mark having completed in the data of middle power down, current main procedure mark and this main procedure, execute this currently main mistake
The subprocess not completed in journey, after complete paired systems are recovered, removes power down mark.Recover to ensure that business is grasped by system
The integrality made and the uniformity of machine card data are moreover it is possible to realize the controlling cashier power-cut-off contiuous printing of invoice well.
Also include: after described system completes to store field data and power down mark, also include turning off the power supply of stand-by power supply,
To keep its electricity.
As shown in Fig. 2 present invention also offers a kind of control system of power down protection, including main control module 21, storing
Module 22 and standby power supply module 23, wherein,
Described main control module 21, if for judging main power source power down, set power down identifies, and by described standby electricity
The power supply of source module 23 carries out storing field data；By the described field data of storage, system is recovered；
Described memory module 22, for storing field data, described field data includes the data of power down, active procedure
Mark and power down mark；
Described standby power supply module 23, for providing the electric energy needed for power down protection process.
Described in the field data of described memory module 22 storage, active procedure mark includes current main procedure mark and is somebody's turn to do
The subprocess mark having completed in main procedure, described memory module can include internal memory ram and nonvolatile storage flash
Deng.
Described main control module passes through the described field data of storage, system is recovered, refers to:
Described main control module reads the described field data of storage, if judging power down mark set.Then extract described
The subprocess mark having completed in the data of power down, current main procedure mark and this main procedure in field data, execution is deserved
The subprocess not completed in front main procedure, after complete paired systems are recovered, removes power down mark.
Described main control module 21, after being additionally operable to complete to store field data and power down mark, turns off the confession of stand-by power supply
Electricity.
Described standby power supply module is capacity cell, and capacity cell can be that the farad capacitor of 1-3f (can provide the 2-3 second
Power supply) or kuf rank electrochemical capacitor (circuit stability to be protected can be provided more than 0.5 second to power) etc..
With reference to example, this method is illustrated using flow process.
The enforcement of the present invention essentially consists in the design of the business software of protected system, but also relies on hardware one
Individual backup battery circuit, provides the electric energy needed for power down protection process.Stand-by power supply circuit discharge and recharge can control, and typically may be used
Do energy storage device with the farad capacitor of 1-3f, according to the power consumption of circuit to be protected, energy storage device provides the power supply of 2-3 second, that is,
The needs of power down protection can be met, and leave larger surplus.Circuit to be protected includes cpu, internal memory ram, non-volatile memory
Device flash etc..In general, using the teaching of the invention it is possible to provide circuit stability to be protected powers more than 0.5 second (or even can be with shorter time)
Ensure the normal work of power-down protection, therefore energy storage device also can use the electrochemical capacitor of kuf rank.This circuit realiration letter
Single, with low cost.
In normal system operation, while main power source charges to stand-by power supply, provide after stand-by power supply circuit
Cpu, ram etc. use, and main power source is also monitored by cpu simultaneously.During system accident power-off, power sense circuit provides power-fail interrupt letter
Number give cpu, main power source turns simultaneously is provided by stand-by power supply.After cpu receives interrupt requests, complete within the time that stand-by power supply provides
Become the work such as the field data storage of power down protection.After completing scene protection, cpu can also actively turn off the confession of stand-by power supply
Electricity, to keep its electricity.
Power down protection and recovery process need software to realize.It would be desirable to an independent business of protection is grasped on software
It is defined as a main procedure, such as invoice distribution main procedure, invoice issuing main procedure, data declaration main procedure etc..Each main mistake
Some operating procedures that journey is comprised according to it again, are divided into several subprocess.Give one to each main procedure, subprocess
Unique process number, such as: main procedure 1,2 ..n, subprocess 11,12,1n of No. 1 main procedure etc..
Power down protection process, comprising: the order execution of several subprocess constitutes a main procedure.One subprocess is opened
During the beginning, first check whether to preserve the input data (critical data) needed for residing main procedure to power failure data structure
In, such as do not preserve and then execute preservation.Shield power-fail interrupt afterwards, to ensure its atomicity；Then main procedure mark will be presently in
Know and subprocess mark write power failure data structure, and set power down mark；Next execution subprocess operation, end of operation
After open power-fail interrupt.So, a complete subprocess operation is carried out finishing.Due to can only be in the afterbody of a subprocess
Response power-fail interrupt, therefore when system occurs power down to carry out interrupt processing, in power failure data structure, always stored power down
Critical data, current main procedure mark, completed subprocess mark and power down mark, interrupt processing can be by power down
Data Cun Chudao power down file or the power down subregion of nonvolatile storage flash, so that start recovery process uses.As all
In subprocess implementation procedure, if there is not power down, power down mark can be removed at main procedure end, to prevent execution start extensive
Multiple.So far, a complete main business process is disposed.When there is not power down in normal execution, power down mark will not set, just
Often operation is unaffected by removing electrical power；Once there is power down in intermediate link, can be by field data (critical data, the boss in this moment
Process identifier, power down mark etc.) write power down file or power failure data area in interrupt processing, thus it is existing to realize complete power down
Script holder records.
Start recovery process, comprising: in system boot initialization procedure, has the subprocess that a step power down checks and recovers.
Read power down file or power failure data area information first, check that power down identifies whether set.As this subprocess is then jumped out in non-set,
Continue executing with other initialization steps；As set, then continue to extract the main procedure mark of power down and subprocess mark, jump to phase
The field position answered, completes the execution of this main procedure residue subprocess, thus ensureing main procedure data and behaviour using critical data
The integrality made, finally ensures the uniformity of data and integrality in machine, ic card, usbkey.After the completion of recovering subprocess, continue
Continuous other initialization steps of execution, completion system normally starts.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any people being familiar with this technology disclosed herein technical scope in, the change or replacement that can readily occur in, all should cover
Within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (7)
1. a kind of control method of power down protection is it is characterised in that include:
If system judges main power source power down, set power down identifies, and sends power-fail interrupt signal to cpu, and passes through stand-by power supply
Power supply carry out store field data, described field data includes the data of power down, current main procedure identify and this main procedure
In completed subprocess mark, power down mark；Wherein, each subprocess is an atomic operation；
In start process upon power-up of the system, detect power down mark condition and the field data of power down memory block, according to power down protection
The field data of process storage, jumps to power-off scene, continues executing with operation with the field data of described storage, recovers and normal
It is finished and the atomic operation process of power down occurs, system is recovered.
2. the method for claim 1 it is characterised in that
The described step that system is recovered, comprising:
Described system reads the described field data of storage, if judging power down mark set, extracts in described field data
The subprocess mark having completed in the data of power down, current main procedure mark and this main procedure, executes in this current main procedure
Undone subprocess, after complete paired systems are recovered, removes power down mark.
3. the method for claim 1 it is characterised in that
Also include: after described system completes to store field data and power down mark, also include turning off the power supply of stand-by power supply.
4. a kind of control system of power down protection is it is characterised in that include: main control module, memory module and stand-by power supply mould
Block, wherein,
Described main control module, if for judging main power source power down, set power down identifies, and sends power-fail interrupt signal to cpu,
And carry out storing field data by the power supply of described standby power supply module；By the described field data of storage, in system
In start process after electricity, detect power down mark condition and the field data of power down memory block, according to showing of power down protection process storage
Field data, jumps to power-off scene, continues executing with operation with the field data of described storage, recover and the generation that is normally finished
The atomic operation process of power down, recovers to system；
Described memory module, for storing field data, described field data includes the data of power down, current main procedure mark
And the subprocess mark having completed in this main procedure, power down identify；Wherein, each subprocess is an atomic operation；
Described standby power supply module, for providing the electric energy needed for power down protection process.
5. system as claimed in claim 4 it is characterised in that
Described system is recovered, refer to:
Described main control module reads the described field data of storage, if judging power down mark set, extracts described scene
The subprocess mark having completed in the data of power down, current main procedure mark and this main procedure in data, executes this current master
During do not complete subprocess, after complete paired systems are recovered, remove power down mark.
6. system as claimed in claim 4 it is characterised in that
Described main control module, after being additionally operable to complete to store field data and power down mark, turns off the power supply of stand-by power supply.
7. system as claimed in claim 4 it is characterised in that
Described standby power supply module is capacity cell.
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| CN201110382102.0A CN103135735B (en) | 2011-11-25 | 2011-11-25 | Power down protection control method and system |
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| CN201110382102.0A CN103135735B (en) | 2011-11-25 | 2011-11-25 | Power down protection control method and system |
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| CN103135735B true CN103135735B (en) | 2017-01-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105512056A (en) * | 2014-09-24 | 2016-04-20 | 中兴通讯股份有限公司 | Method and device for data storage, and terminal |
| WO2016141817A1 (en) * | 2015-03-06 | 2016-09-15 | 华为技术有限公司 | Data backup device and method |
| CN105938447B (en) | 2015-03-06 | 2018-12-14 | 华为技术有限公司 | Data backup device and method |
| CN104698945B (en) * | 2015-03-20 | 2018-06-19 | 国家电网公司 | A kind of power module for showing power down time |
| CN105262632A (en) * | 2015-11-25 | 2016-01-20 | 武汉微创光电股份有限公司 | Network transmission equipment power failure alarming system and method in network video monitoring |
| CN108532115B (en) * | 2018-03-30 | 2020-10-09 | 常熟长润智能科技有限公司 | PWM control system for controlling circular knitting machine |
| CN110851312A (en) * | 2019-11-13 | 2020-02-28 | 深圳忆联信息系统有限公司 | Test method and device for rapidly simulating power failure protection and computer equipment |
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