CN109240622A - A kind of method and system of EEPROM data write-in - Google Patents
A kind of method and system of EEPROM data write-in Download PDFInfo
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- CN109240622A CN109240622A CN201811122642.3A CN201811122642A CN109240622A CN 109240622 A CN109240622 A CN 109240622A CN 201811122642 A CN201811122642 A CN 201811122642A CN 109240622 A CN109240622 A CN 109240622A
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- data
- backup area
- block
- written
- eeprom
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/062—Securing storage systems
- G06F3/0622—Securing storage systems in relation to access
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0638—Organizing or formatting or addressing of data
- G06F3/064—Management of blocks
Abstract
The invention discloses a kind of method and system of EEPROM data write-in, this method comprises: EEPROM memory space is divided into several memory blocks；In the memory block, backup area and memory block are determined；The EEPROM data are divided into the data block to match with the memory block quantity；First data block is written to the backup area, if first data block is written successfully, the backup area is determined as to the effective district of first data block；The first memory block corresponding with first data block is redefined as backup area, the second data block is written to the backup area, and rejudge whether the second data block is written success, until the EEPROM data are all written.The purpose for improving the space EEPROM utilization rate and guaranteeing the write-in of EEPROM data safety is realized through the invention.
Description
Technical field
The present invention relates to technical field of data processing, more particularly to a kind of method and system of EEPROM data write-in.
Background technique
Along with the fast development of industrial equipment, intelligence instrument device requirement increases sharply, few based on internal control resource, advanced
Safety low cost external non-volatile memory demand it is increasing.Based on cost, using it is simple, can be general by being higher than
The effect for the pressure that is powered generallys use EEPROM many factors, the intelligence instrument such as to wipe and reprogram
(ElectricallyErasable Programmable Read-Only Memory, band Electrically Erasable Programmable Read-Only Memory)
To store the important parameter that all are operated normally about instrument.
ECU (Electronic Control Unit, electronic control unit) can be by runing time, traveling when electric at T15
The data such as mileage are stored into EEPROM, are powered on next time and are read from EEPROM again.If during storage is to EEPROM
Power-off suddenly, then the data in EEPROM can store failure, so that data corruption or loss, the data of mistake can also when serious
Cause the reset of ECU.
To solve the above problems, will usually be stored in data full backup in EEPROM in the prior art, deposited in EEPROM
Data are starved in new and old two versions.In this way when accessing the power-off of new edition notebook data, legacy data is then read when next time powers on.By
In using data all one's duties in the prior art, so that the space utilization rate of EEPROM is low, it is only capable of storage EEPROM available space
Half size, and single memory block is larger, and the probability that power-off damage occurs is bigger.
Summary of the invention
It is directed to the above problem, the present invention provides a kind of method and device of EEPROM data write-in, realizes raising
The space EEPROM utilization rate and the purpose for guaranteeing the write-in of EEPROM data safety.
To achieve the goals above, the present invention provides the following technical scheme that
A kind of method of EEPROM data write-in, comprising:
EEPROM memory space is divided into several memory blocks；
In the memory block, backup area and memory block are determined；
The EEPROM data are divided into the data block to match with the memory block quantity；
First data block is written to the backup area, if first data block is written successfully, by the backup area
It is determined as the effective district of first data block；
The first memory block corresponding with first data block is redefined as backup area, the second data block is written to
The backup area, and rejudge whether the second data block is written success, until the EEPROM data are all written.
Optionally, if first data are written to backup area failure, this method further include:
The data of the backup failure are obtained by the first memory block.
Optionally, this method further include:
When detecting two effective identical blocks, the write time of described two identical data blocks is compared, it will
The data block that write time meets preset requirement is determined as latest data block.
Optionally, if failure when memory block is redefined as backup area, this method further include:
When electronic control unit is when carrying out reading data, the memory block is re-flagged as backup area.
A kind of system of EEPROM data write-in, comprising:
Space division unit, for EEPROM memory space to be divided into several memory blocks；
Determination unit, for determining backup area and memory block in the memory block；
Data block division unit, for the EEPROM data to be divided into the data to match with the memory block quantity
Block；
Writing unit, for the first data block to be written to the backup area, if first data block is written successfully,
The backup area is determined as to the effective district of first data block；
Backup area determination unit, for the first memory block corresponding with first data block to be redefined as backup
Second data block is written to the backup area, and rejudges whether the second data block is written success by area, until will be described
EEPROM data are all written.
Optionally, the system further include:
Data capture unit, if when for first data to be written to backup area failure, passing through the first storage
Area obtains the data of the backup failure.
Optionally, the system further include:
Data block determination unit, for comparing described two identical when detecting two effective identical blocks
The data block that write time meets preset requirement is determined as latest data block by the write time of data block.
Optionally, the system further include:
Marking unit, if failure when for memory block to be redefined as backup area, when electronic control unit is being counted
When according to reading, the memory block is re-flagged as backup area.
Compared to the prior art, the present invention provides a kind of method and system of EEPROM data write-in, EEPROM is deposited
Storage space, which divide, has obtained several memory blocks, and backup area and memory block have been determined in memory block, reduces in this way
The space size of backup area so that the available space EEPROM is larger improves EEPROM space utilization rate, and the backup
Area is dynamic change, after data block is written successfully, sets effective district for backup area, corresponding is deposited the data block is original
Storage area is redefined as backup area, and data are first written to backup area, guarantees that powering off data suddenly when data storage will not lose
It loses, ensure that the write-in safety of EEPROM data.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow diagram of EEPROM method for writing data provided in an embodiment of the present invention；
Fig. 2 is a kind of schematic diagram of EEPROM data subregion provided in an embodiment of the present invention；
Fig. 3 is a kind of process schematic for writing data into first memory block provided in an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of the system of EEPROM data write-in provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Term " first " and " second " in description and claims of this specification and above-mentioned attached drawing etc. are for area
Not different objects, rather than for describing specific sequence.Furthermore term " includes " and " having " and their any deformations,
It is intended to cover and non-exclusive includes.Such as it contains the process, method of a series of steps or units, system, product or sets
It is standby not to be set in listed step or unit, but may include the step of not listing or unit.
Provide a kind of EEPROM method for writing data in embodiments of the present invention, referring to Fig. 1, this method may include with
Lower step:
S101, EEPROM memory space is divided into several memory blocks；
S102, in the memory block, determine backup area and memory block.
The memory block of same size is divided into according to the size of EEPROM memory space, it is one of to be used to the area that backups,
It is remaining to be used as memory block.It referring to fig. 2, is a kind of schematic diagram of EEPROM data subregion provided in an embodiment of the present invention.
By taking memory space is the eeprom chip of 16K size as an example, EEPROM memory space is divided into 16 pieces, every block size is
1Kbyte.Wherein, user is supplied to using 15K memory space, and remaining 1K is backup area.The corresponding storage of 15K memory space
It is index1 to index15 that block works out serial number as shown in Figure 2.
S103, the EEPROM data are divided into the data block to match with the memory block quantity；
For the ease of the write-in of data, the data for needing to be written into are divided into several data blocks, wherein data block
Quantity is consistent with the quantity of memory block.
S104, the first data block is written to the backup area, it, will be described standby if first data block is written successfully
Part area is determined as the effective district of first data block；
S105, it will be redefined as backup area with original corresponding first memory block of first data block, by the second number
It is written to the backup area according to block, and rejudges whether the second data block is written success, until the EEPROM data are complete
Portion's write-in.
Still by taking Fig. 2 as an example, 1Kbyte is written in each data, writes data into backup area, backup area success to be written first
Afterwards, effective district is set by backup area, original memory block is then labeled as backup area, which is a dynamic mistake
Journey.I.e. by after the write-in backup area success of the first data block, backup area is set by the first memory block, then by the second database write
After entering backup area success, backup area is set by the second memory block, until all 15 data blocks are written successfully.
The present invention provides a kind of methods of EEPROM data write-in, and EEPROM memory space has been carried out division and has been obtained
Several memory blocks, and backup area and memory block have been determined in memory block, the space size of backup area is reduced in this way, so that
The available space EEPROM is larger, improves EEPROM space utilization rate, and the backup area is dynamic change, works as data block
After being written successfully, effective district is set by backup area, the corresponding memory block of the database is redefined as backup area, by data
It is first written to backup area, guarantees that powering off data suddenly when data storage will not lose, ensure that the write-in peace of EEPROM data
Entirely.
It is a kind of process schematic for writing data into first memory block provided in an embodiment of the present invention referring to Fig. 3.
First step: the data that will be written are written to the 16th Area-Specific Archive area, and mark the zone state to be
index1-pre；
Second step: if first step success, the 16th subregion state is labeled as index1；
Third step: if second step success, the 1st subregion state is labeled as backup area.
After above three step, backup zone position becomes first piece.It is empty storing remaining index2-index15
Between when, backup zone position is always in dynamic change.
Method that is corresponding, further comprising abnormality processing in embodiments of the present invention, specific:
Optionally, if first data are written to backup area failure, this method further include:
The data of the backup failure are obtained by the first memory block.
Optionally, this method further include:
When detecting two effective identical blocks, the write time of described two identical data blocks is compared, it will
The data block that write time meets preset requirement is determined as latest data block.
Optionally, if failure when memory block is redefined as backup area, this method further include:
When electronic control unit is when carrying out reading data, the memory block is re-flagged as backup area.
Pass through complete exception handling procedure, it is ensured that ECU any time when data store powers off, and ECU is powered on again
When can read believable data.Illustrate by taking the description process in Fig. 3 as an example, if power-off occurs in the first step when storage
When rapid, then when ECU is powered on again, it still is able to read the index1 data completed.In this state, preceding 15 pieces of memory blocks are
Valid data are saved, the 16th piece of region is as backup area.
If power-off occurs when ECU is powered on again, to detect two believable index1 in second step when storage
Data.ECU determines newest data by the write time of two index1 blocks of comparison at this time.
If power-off occurs to fail when the 1st bulk state being labeled as backup area, then ECU exists in third step when storage
When reading, the bulk state is only needed to re-flag as backup area.
Through the embodiment of the present invention, backup area is write data into first before storing EEPROM data, guarantees data storage
When ECU power off data suddenly and will not lose；The space EEPROM is divided into multiple fritters, stores several times, improves EEPROM sky
Between utilization rate；Backup zone position dynamic change improves EEPROM service life.
A kind of system of EEPROM data write-in is additionally provided in embodiments of the present invention, and referring to fig. 4, which includes:
Space division unit 401, for EEPROM memory space to be divided into several memory blocks；
Determination unit 402, for determining backup area and memory block in the memory block；
Data block division unit 403 matches for being divided into the EEPROM data with the memory block quantity
Data block；
Writing unit 404, for the first data block to be written to the backup area, if first data block is written to
The backup area is then determined as the effective district of first data block by function；
Backup area determination unit 405, for will the first memory block corresponding with first data block be redefined as it is standby
Part area, is written to the backup area for the second data block, and rejudge whether the second data block is written success, until will be described
EEPROM data are all written.
The present invention provides a kind of systems of EEPROM data write-in, by EEPROM memory space in the division unit of space
Divide and obtained several memory blocks, and backup area and memory block have been determined in memory block by determination unit, this
Sample reduces the space size of backup area, so that the available space EEPROM is larger, improves EEPROM space utilization rate, passes through
Data block division unit, writing unit and backup area determination unit can be found that the backup area is dynamic change, work as data block
After being written successfully, effective district is set by backup area, the corresponding memory block of the data block is redefined as backup area, by data
It is first written to backup area, guarantees that powering off data suddenly when data storage will not lose, ensure that the write-in peace of EEPROM data
Entirely.
Optionally, the system on the basis of the above embodiments further include:
Data capture unit, if when for first data to be written to backup area failure, passing through the first storage
Area obtains the data of the backup failure.
Optionally, the system further include:
Data block determination unit, for comparing described two identical when detecting two effective identical blocks
The data block that write time meets preset requirement is determined as latest data block by the write time of data block.
Optionally, the system further include:
Marking unit, if failure when for memory block to be redefined as backup area, when electronic control unit is being counted
When according to reading, the memory block is re-flagged as backup area.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (8)
1. a kind of method of EEPROM data write-in characterized by comprising
EEPROM memory space is divided into several memory blocks；
In the memory block, backup area and memory block are determined；
The EEPROM data are divided into the data block to match with the memory block quantity；
First data block is written to the backup area, if first data block is written successfully, the backup area is determined
For the effective district of first data block；
The first memory block corresponding with first data block is redefined as backup area, the second data block is written to described
Backup area, and rejudge whether the second data block is written success, until the EEPROM data are all written.
2. the method according to claim 1, wherein failing if first data are written to the backup area
When, this method further include:
The data of the backup failure are obtained by the first memory block.
3. according to the method described in claim 2, it is characterized in that, this method further include:
When detecting two effective identical blocks, the write time of described two identical data blocks is compared, will be written
The data block that time meets preset requirement is determined as latest data block.
4. according to the method described in claim 3, it is characterized in that, being somebody's turn to do if failure when memory block is redefined as backup area
Method further include:
When electronic control unit is when carrying out reading data, the memory block is re-flagged as backup area.
5. a kind of system of EEPROM data write-in characterized by comprising
Space division unit, for EEPROM memory space to be divided into several memory blocks；
Determination unit, for determining backup area and memory block in the memory block；
Data block division unit, for the EEPROM data to be divided into the data block to match with the memory block quantity；
Writing unit, for the first data block to be written to the backup area, if first data block is written successfully, by institute
State the effective district that backup area is determined as first data block；
Backup area determination unit will for the first memory block corresponding with first data block to be redefined as backup area
Second data block is written to the backup area, and rejudges whether the second data block is written success, until by the EEPROM
Data are all written.
6. system according to claim 5, which is characterized in that the system further include:
Data capture unit, if being obtained when for first data to be written to backup area failure by the first memory block
Take the data of the backup failure.
7. system according to claim 6, which is characterized in that the system further include:
Data block determination unit, for comparing described two identical data when detecting two effective identical blocks
The data block that write time meets preset requirement is determined as latest data block by the write time of block.
8. system according to claim 7, which is characterized in that the system further include:
Marking unit, if failure when for memory block to be redefined as backup area, when electronic control unit is carrying out data reading
When taking, the memory block is re-flagged as backup area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811122642.3A CN109240622B (en) | 2018-09-26 | 2018-09-26 | Method and system for writing EEPROM data |
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|---|---|---|---|
| CN201811122642.3A CN109240622B (en) | 2018-09-26 | 2018-09-26 | Method and system for writing EEPROM data |
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| CN109240622B CN109240622B (en) | 2021-10-08 |
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| CN110134645A (en) * | 2019-04-15 | 2019-08-16 | 深圳市战音科技有限公司 | File system memory management method, read method, managing device and reading device |
| CN110281865A (en) * | 2019-06-29 | 2019-09-27 | 潍柴动力股份有限公司 | A kind of vehicle control device and date storage method |
| CN110888605A (en) * | 2019-12-11 | 2020-03-17 | 重庆超力高科技股份有限公司 | EEPROM data writing method and device and electronic equipment |
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| CN114563995A (en) * | 2022-01-17 | 2022-05-31 | 潍柴动力股份有限公司 | Reset detection method, device and equipment of electronic control unit and storage medium |
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