CN109144547A - A kind of electric energy meter legality measurement program and non-legal system function program separation method - Google Patents
A kind of electric energy meter legality measurement program and non-legal system function program separation method Download PDFInfo
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- CN109144547A CN109144547A CN201810950613.XA CN201810950613A CN109144547A CN 109144547 A CN109144547 A CN 109144547A CN 201810950613 A CN201810950613 A CN 201810950613A CN 109144547 A CN109144547 A CN 109144547A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/65—Updates
- G06F8/654—Updates using techniques specially adapted for alterable solid state memories, e.g. for EEPROM or flash memories
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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
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
- G06F11/1469—Backup restoration techniques
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Abstract
The invention discloses a kind of electric energy meter legality measurement programs and non-legal system function program separation method, it includes the following steps: (1) that electric energy meter hardware structure is designed as metering core and management core twin-core structure；Metering core and management core are divided into podium level and component layer；Step 2, the podium level configuration metering MCU in metering core, manage the podium level configuration management MCU of core, metering MCU and management MCU and are carried out data transmission by SPI interface circuitry；Step 3 installs legal system accounting procedure in metering MCU；Non- legal system function program is installed in management MCU；The electric energy meter for solving the prior art will measure and other function integrated design, and the change of funtion part is easy to influence function of measuring, and damage or failure are easy to cause the damage or failure of metering section；The upgrading of follow-up management core software program is easy to influence the legality measurement function of metering core, causes the technical problems such as metering misalignment event.
Description
Technical field
The invention belongs to Electric Energy Metering Technology field more particularly to a kind of electric energy meter legality measurement programs and non-legal system function
Program separation method.
Background technique:
Existing operation electric energy meter will measure and the design of other function integrations, considers manufacturing process and cost, legality measurement and
In the same single-chip microcontroller, the change of funtion part is easy to influence function of measuring, damage or mistake non-legal system function program
Effect is easy to cause the damage or failure of metering section；Consider manufacturing process and cost, legality measurement and non-legal system function program are still
In the same single-chip microcontroller, if separating without program, the upgrading of follow-up management core software program is easy to influence metering core
Legality measurement function causes metering misalignment event.
Summary of the invention:
The technical problem to be solved in the present invention: a kind of electric energy meter legality measurement program and non-legal system function program separation side are provided
Method, to solve, the electric energy meter of the prior art will be measured and other function integrated design, the change of funtion part are easy to influence
To function of measuring, damage or fail being easy to cause the damage or failure of metering section；Legality measurement and non-legal system function program
Still in the same single-chip microcontroller, if separating without program, the upgrading of follow-up management core software program is easy to influence metering core
Legality measurement function, cause the metering technical problems such as misalignment event.
Technical solution of the present invention:
A kind of electric energy meter legality measurement program and non-legal system function program separation method, it includes:
Electric energy meter hardware structure is designed as metering core and management core twin-core structure by step 1；Metering core and management core are drawn respectively
It is divided into podium level and component layer；
Step 2, the podium level configuration metering MCU in metering core, manage the podium level configuration management MCU of core, measure MCU and management
MCU is carried out data transmission by SPI interface circuitry；
Step 3 installs legal system accounting procedure in metering MCU；Non- legal system function program is installed in management MCU；Legality measurement program
" twin-core " realization is based on non-legal system function program to be completely separated.
The program structure on MCU and management MCU is measured according to Hierarchical Design, contains driving layer, interface layer and application respectively
Layer.
The management core is divided to two program sectionings, bootstrap area and the program area APP, stores original APP journey with external FLASH
Sequence and APP program to be upgraded；The purpose of storage original APP program is standby before restoring when upgrading being prevented unsuccessfully to be unable to operate normally
Part program.
The upgrading of program on management core, which uses, first stores upgrade mode again.
APP program is to collect upgrading data by port and be put into external FLASH, when detecting that upgrade procedure collected
After whole, application layer data is saved with to be restored, and closing is all interrupted, and is set and is upgraded mark, and execution warm reset executes software from liter
Grade.
The method of the upgrading APP program are as follows:
Step 6.1,00H remove transmission file, empty the file content upgraded in the past；
Step 6.2 issues upgrade file, starting, intermediate frame to electric energy meter transmission 01H；
Step 6.3 issues upgrade file, end frame to electric energy meter transmission 11H；
Step 6.4, electric energy meter carry out CRC check to the message received, and verification is updated by rear startup program；
Step 6.5 is updated and is completed, self refresh unused portion FLASH；
Step 6.6, electric energy list procedure are restarted automatically；
Step 6.7 passes through transparent electric energy meter software version number, reaffirms whether electric energy meter upgrades successfully.
Beneficial effects of the present invention:
The present invention is by legality measurement program and non-legal system function program from physically separating；Between pass through SPI interface
Carry out information exchange；When non-legal system function program needs to upgrade, can be used for realizing remote software online upgrading, upgrading not at
Function can also restore the Stability and veracity that will not influence legality measurement part to version before, solve prior art function
Can property software program upgrading or BUG caused by confusion may result in legality measurement function damage or failure the problem of.To user
For new function can be increased by software upgrading, meet user and customize demand；It can not influenced for power supply company
Software vulnerability is solved by remote software upgrade on the basis of function of measuring, improves reliable, the independence, personalization of program upgrading,
Electric energy meter Life cycle maintenance cost is reduced, product reuse rate is improved, reduces the wasting of resources caused by product frequently upgrades, section
Cost-saving, it is with good economic efficiency.
Specific embodiment:
A kind of electric energy meter legality measurement program and non-legal system function program separation method, it include: 1) hardware structure setting, 2) it is soft
The setting of part framework, 3) management core software upgrading three parts.
Electric energy meter is divided into metering core and management core by the setting of hardware structure；Metering core and management core respectively include platform
Layer, component layer (extension layer), podium level are divided into management MCU and metering MCU two parts, carry out data biography by SPI interface circuitry
It is defeated, it is mutually indepedent on respective component layer (extension layer) hardware.Metering core is as base table, main cumulative basis energy data, simultaneously
Have the functions such as data storage, pulse instruction, full decompression, abnormity of power supply event detection, data are handed over by 698 agreements and management core
Mutually, so that outside display, communication, logout, the independent RS485 interface of metering core can only be read, any setting is not supported to operate,
For tracing to the source for legal system data.Core is managed as functional module, mainly undertakes the management role of whole table, including takes control and shows, is right
The tasks such as outer communication, logout, data-frozen, load control system, to metering core clock setting order by 698 clear-text ways into
Row, when remotely carrying out clock setting, it is necessary to first pass around management MCU, management core MCU can pass through ESAM after receiving setting command
Safety verification is carried out, guarantees the safety of significant data with this.Core function is managed with decontroling electrity market, there are diversified management
Demand can be managed core function upgrading by way of remote upgrade program.Management core is related to the function of charge, can pass through meter
Freeze electric energy and checked in amount core basis.
Metering core and management core communication interface use hypotactic SPI communication mode, manage core as main website and master
SPI, as slave station and from SPI, the foundation of communication link is controlled with releasing by main website metering core.
To timely respond to the SPI communication request that main website manages core, metering core notifies management core by the way of busy mark, i.e.,
Core main SPI is when issuing communication data for management, before getting out reply data from SPI metering core, to management main SPI mono-, core busy mark
(fixed to use 16H).
Transmission frame format uses DL/T698.45.Traffic rate is not less than 100k/bps.
Software architecture includes metering MCU platform and management MCU platform.Measuring the part MCU is base table program, i.e. legality measurement
Program, the part management MCU is non-legal system functional application.Legality measurement program and non-legal system function program be based on " twin-core " and
The realization of software layer sub-module is completely separated.
MCU and the part management MCU are measured according to Hierarchical Design, the layer containing driving, interface layer and application layer, general to produce respectively
The variation of product functionality, need to only change application layer module.
Manage core component software can online upgrading, do not influence the Stability and veracity of metering section, upgrade it is unsuccessful can
Version before return decides whether to upgrade management core by distinguishing the demand of ammeter program.
Management core software upgrading includes software upgrading type classification, software upgrading application class, the classification of software upgrading scale,
Software upgrading pattern classification.
The software upgrading type includes software function upgrading and database (data structure) upgrading.Software function upgrade package
It includes and increases software function and former function is improved.When increasing software function, the corresponding program segment of the function is increased to it
In his similar functional module or individually increase a functional module；It is corresponding to this function when being improved to former function
Module is modified, and original functional module is then replaced.There is no database inside " twin-core " electric energy table entry, but contains number
According to structure, it is consequently belonging to software function upgrading, and compatible legacy data structure.
The software upgrading is applied including operating system update, application software upgrade, drive software upgrading, according to using need
Different upgrade functions is taken, " twin-core " electric energy meter though software is divided into multilayer, for example drives due to being limited by hardware resource
Layer, interface layer and application layer, application software and drive software need to upgrade together, for HardwareUpgring of looking ahead, so rising
It needs to consider hardware version when grade.The upgrading of " twin-core " electric energy meter belongs to application software and drive software mixing upgrading.
The software upgrading scale includes all upgradings, part upgrading (upgrade patch upgrading)." twin-core " electric energy meter considers
The integrality and trackability of software upgrading, using unified whole upgrading modes, i.e. management core program all upgrades, software liter
It needs to trace the software version before upgrading when grade.
The software upgrading mode upgrades again including directly upgrading, first storing.Direct upgrade mode is not take up very big storage
Space often receives one section of upgrading message, direct refurbishing procedure space after the validity of judgment frame.System requirements has resident guidance journey
Sequence such as should at least support communication, on line refreshable application program, reboot at the functions.Direct upgrade mode is straight after starting upgrading
Refreshing application program is connect, original application program can stop running immediately in escalation process；First store again upgrade mode occupancy
Larger memory space often receives one section of upgrading message, is first stored in DATAFLASH after the validity of judgment frame, when whole reports
Text carries out secondary verification after receiving, starting application program refreshes after verification passes through, and finally just reboots program.System can
With whole upgradings, it is not required to resident bootstrap；It such as needs resident bootstrap to require to be relatively low, that is, does not need to support communication
Function only need to support on line refreshable application program, reboot etc. functions." twin-core " electric energy meter uses first to store upgrades mould again
Formula.
" twin-core " electric energy meter software is divided into the not scm software of tape operation system and tape operation system scm software, area
Divide the not application upgrade of tape operation system, the application upgrade with small-scale operating system (such as FreeRTOS, i^COS), the large-scale behaviour of band
Make the application upgrade of system (such as LINUX).
The application apparatus general procedure design capacity of tape operation system is not smaller, and program is stored in the storage of CPU internal processes
Qu Zhong, upgrading need CPU to support IAP(In-Application Programming, in-service units) function, user is by answering
The embedded execution program of update is reprogramed with software itself.It operates normally program and IAP function program is general independent in the area Liang Ge
In block, interrupt function must be closed when executing IAP process, prevents the illegal calling of interrupt routine during program updating.
Application apparatus general procedure design capacity with small-scale operating system (such as FreeRTOS, i^COS) is medium and usual
It is stored in the internal storage region CPU, supports remote online upgrade function using the mode for updating entire application file, when operation needs
The RAM wanted is than the general increase 4KB or so without system, therefore the cpu resource selected and not tape operation system is essentially identical.
As ST Cortex-M3 family chip not only supports IAP function, and interrupt vector table is supported to map, program storage
Device can divide multiple blocks to be programmed, and 1 block runs resident program, execute the update to other blocks.
The application apparatus general procedure design capacity of large operation system (such as LINUX) is larger, and program is stored in outside CPU
In memory block, solution is run into SDRAM and (is similar to PC machine) when normal, and remote online upgrade function is supported generally to use text
Part renewal model, therefore the CPU selected needs dominant frequency higher position reason ability stronger, plug-in memory capacity is bigger.
In view of the design requirement of electric energy meter low-power consumption, program capacity demand is not very big, at the same consider electric energy meter technology at
The many factors such as ripe degree, scheme resource, product cost, therefore the general hsrdware requirements design for selecting not tape operation system.
A kind of electric energy meter legality measurement program and non-legal system function program separation method, " twin-core " electric energy meter is not using
Tape operation system design, software upgrading are used using height-rise grade, updating and management core functional software first stores upgrade mode again.
It manages core and uses two program sectionings, bootstrap area and the program area APP, store original APP program with external FLASH
With APP program to be upgraded.The purpose of storage original APP program has been backed up before restoring when upgrading being prevented unsuccessfully to be unable to operate normally
Program.
It manages core MCU and uses multi-functional, high-performance, the dedicated 256KMCU chip of low-power consumption electric energy meter, programming is divided into two
Part, first part are system resident program, storage address 0x0,000 0000-0x000 07FFF, size 0x8000
(32Kbytes)；Second part is APP application program, storage address 0x0000 8000-0x0004 0000, size 0x38000
(224Kbytes).
The management core software upgrading of a kind of electric energy meter legality measurement program and non-legal system function program separation method, it is wrapped
It includes: 1) software upgrading communication mechanism, 2) software upgrading committed step, 3) software upgrading security protection, 4) based on management core design
Program sectioning, 5) metering core access mode.
The software upgrading communication mechanism refers to transmission information of upgrade file, to verify product software and file to be upgraded
Matching.
Information of upgrade file is 128 bytes, is identified and is transmitted using growth data；
Upgrade file size is 4 bytes, and judgment basis is wiped in advance and completely received to upgrade file memory space；
Every frame transmission size is 1 byte, for judging whether communication buffer size meets subsequent upgrade requirement, except most when transmission
The latter inconsistent outer other frames of frame length press this size, are the foundations of upgrade file splicing calculations of offset；
Compression mark is 1 byte, and whether upgrade file, which needs, decompresses, and compression can save transmission communication flow and improve efficiency, this
Invention uses uncompressed carry out upgrade design；
It is 64 bytes that upgrade file, which is applicable in version, and version number of manufacturer software (ASCII) is 32 bytes, producer's hardware version numbers
(ASCII character) is 32 bytes, avoids mismatch software from rising up into, improves the safety of software；
FileVersion is 32 bytes after upgrading, and version number of manufacturer software (ASCII) is 32 bytes, can the copy reading number after upgrading successfully
According to the secondary judgement of progress；
Check code is 2 bytes, and integrality Rule of judgment can be using a variety of verification modes such as radix-minus-one complement verification, CRC, cryptographic Hash, this
Invention uses CRC check, avoids upgrading software transmission process error；
Reserved byte is 24 bytes, the subsequent expansion for software upgrading.
RS485, infrared or carrier communication interface mode can be used in information of upgrade file transmission, it then follows DL/T 645-
2007 multifunctional electric energy meter communication protocols realize that software upgrading communication is using broadcast and actual communication by 4 byte datas of extension
Address two ways.
File identification: 00H removes transmission file, disposably removes upgrade file；01H issues upgrade file, starting, centre
Frame；11H issues upgrade file, end frame.
Total number of segment: it is calculated according to program size；
N-th segment identification (n-1 of i=0): in addition to final stage, remaining length is fixed.
File data: being file content when message mode is transmitted, and removing transmission file is then empty, data length of the present invention
Using 128 byte, one frame data.
The software upgrading committed step, it includes:
Step 1,00H remove transmission file, empty the file content upgraded in the past；
Step 2 issues upgrade file, starting, intermediate frame to electric energy meter transmission 01H；
Step 3 issues upgrade file, end frame to electric energy meter transmission 11H；
Step 4, electric energy meter carry out CRC check to the message received, and verification is updated by rear startup program；
Step 5 is updated and is completed, self refresh unused portion FLASH；
Step 6, electric energy list procedure are restarted automatically；
Step 7 passes through transparent electric energy meter software version number, reaffirms whether electric energy meter upgrades successfully.
It is worth mentioning that considering that subsequent software compares and program security, the program that do not use to this upgrading use
Erasing operation prevents software from comparing unqualified or program and is strayed into.
The software upgrading security protection includes authentication and Version Control.It is transmitted between test main website and electric energy meter
Data demand is referring to " Q/G DW1365-2013 intelligent electric energy meter information exchange secure authentication technology specification ".Escalation process needs elder generation
Authentication is carried out, the mode of specified table number or broadcast address can be used, certification uses frame check+CRC check side after passing through
Formula carries out data transmission.
The program sectioning based on management core design includes bootstrap area and the area APP；Design external FLASH, storage
Former APP program and APP program to be upgraded realize that the non-legal system function of electric energy meter remotely exists while not influencing legality measurement function
Line upgrading, if upgrading is unsuccessful to restore preceding program.
The bootstrap is mainly used for realizing the heavy duty of upgrade code, first carries out school to the complete upgrade code received
It tests, verifies by code update to main program area after passing through, if verification is not by then jumping to main program area without code update
It brings into operation.
The APP program mainly collects upgrading data by port and is put into external FLASH, when detecting upgrading journey
After sequence is collected completely, application layer data is saved with to be restored, and closing is all interrupted, and is set and is upgraded mark, and execution warm reset executes soft
Part is from upgrade function.
Claims (6)
1. a kind of electric energy meter legality measurement program and non-legal system function program separation method, it includes:
Electric energy meter hardware structure is designed as metering core and management core twin-core structure by step 1；Metering core and management core are drawn respectively
It is divided into podium level and component layer；
Step 2, the podium level configuration metering MCU in metering core, manage the podium level configuration management MCU of core, measure MCU and management
MCU is carried out data transmission by SPI interface circuitry；
Step 3 installs legal system accounting procedure in metering MCU；Non- legal system function program is installed in management MCU；Legality measurement program
" twin-core " realization is based on non-legal system function program to be completely separated.
2. a kind of electric energy meter legality measurement program according to claim 1 and non-legal system function program separation method, special
Sign is: the program structure on metering MCU and management MCU is according to Hierarchical Design, the layer containing driving, interface layer and application respectively
Layer.
3. a kind of electric energy meter legality measurement program according to claim 1 and non-legal system function program separation method, special
Sign is: the management core is divided to two program sectionings, bootstrap area and the program area APP, stores original APP journey with external FLASH
Sequence and APP program to be upgraded；The purpose of storage original APP program is standby before restoring when upgrading being prevented unsuccessfully to be unable to operate normally
Part program.
4. a kind of electric energy meter legality measurement program according to claim 3 and non-legal system function program separation method, special
Sign is: the upgrading of the program on management core, which uses, first stores upgrade mode again.
5. a kind of electric energy meter legality measurement program according to claim 3 and non-legal system function program separation method, special
Sign is: APP program is to collect upgrading data by port and be put into external FLASH, when detecting that upgrade procedure collected
After whole, application layer data is saved with to be restored, and closing is all interrupted, and is set and is upgraded mark, and execution warm reset executes software from liter
Grade.
6. a kind of electric energy meter legality measurement program according to claim 3 and non-legal system function program separation method, special
Sign is: the method for the upgrading APP program are as follows:
Step 6.1,00H remove transmission file, empty the file content upgraded in the past；
Step 6.2 issues upgrade file, starting, intermediate frame to electric energy meter transmission 01H；
Step 6.3 issues upgrade file, end frame to electric energy meter transmission 11H；
Step 6.4, electric energy meter carry out CRC check to the message received, and verification is updated by rear startup program；
Step 6.5 is updated and is completed, self refresh unused portion FLASH；
Step 6.6, electric energy list procedure are restarted automatically；
Step 6.7 passes through transparent electric energy meter software version number, reaffirms whether electric energy meter upgrades successfully.
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| CN111857777A (en) * | 2020-07-16 | 2020-10-30 | 南方电网数字电网研究院有限公司 | System updating method and device based on double-core intelligent electric meter and computer equipment |
| CN111857777B (en) * | 2020-07-16 | 2024-02-27 | 南方电网数字电网科技(广东)有限公司 | System updating method and device based on double-core intelligent ammeter and computer equipment |
| CN113312078A (en) * | 2021-05-07 | 2021-08-27 | 南方电网数字电网研究院有限公司 | Electric energy meter software modularization difference upgrading method and electric energy meter system |
| CN114138201A (en) * | 2021-12-02 | 2022-03-04 | 国网山东省电力公司营销服务中心(计量中心) | Electric energy meter built-in memory data storage monitoring method and system |
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