CN106408684A - Fault information storage method and device - Google Patents
Fault information storage method and device Download PDFInfo
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- CN106408684A CN106408684A CN201610874080.2A CN201610874080A CN106408684A CN 106408684 A CN106408684 A CN 106408684A CN 201610874080 A CN201610874080 A CN 201610874080A CN 106408684 A CN106408684 A CN 106408684A
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- fault message
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- storage region
- fault
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0841—Registering performance data
- G07C5/085—Registering performance data using electronic data carriers
-
- 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
- G06F3/0608—Saving storage space on storage systems
-
- 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
-
- 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
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0673—Single storage device
- G06F3/068—Hybrid storage device
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0808—Diagnosing performance data
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- Debugging And Monitoring (AREA)
Abstract
The invention provides a fault information storage method and device. The method comprises the steps of detecting the data volume of fault information needed to be stored currently; checking the remained space of a first storage area for storing fault information in the random access memory in a vehicle; If the difference between the data volume of the fault information to be stored currently and the remained space of the first storage area is larger than or equal to a first preset value and smaller than a second preset value, the stored fault information in the first storage area is partially or wholly transferred to a read-only EEPROM which is both electrically erasable and programmable, and fault information needing to be stored currently is transferred to and stored in the first storage area. The technical scheme not only can wholly record the existent information of the faults which already occur, but also can timely store the fault information of newly emerged faults, thereby enhancing the utilization rate of the storage space.
Description
Technical field
The present invention relates to automobile technical field, more particularly, to a kind of method and device of fault message storage.
Background technology
In the face of increasingly severe energy and environment problem, energy-conservation and new-energy automobile are just becoming the heat of current various countries research
Point.As one kind of energy-conservation and new-energy automobile, pure electric automobile has emission-free discharge, energy efficiency in the process of moving
The multiple advantages such as height, low, the recoverable energy of noise.With the fast development of pure electric automobile, integrated control becomes pure electricity
The trend of electrical automobile current development.Integrated control, as the term suggests, rely on the powerful computing capability of microprocessor at this stage, enrich
Function and external resource, the separate controller that will be responsible for difference in functionality effectively integrates, by common hardware resource, real
The institute now originally being completed by multiple independent controls is functional.
System is at any time for onboard diagnostic system (On-Board Diagnostic, abbreviation OBD) in car load integrated manipulator
The ruuning situation of monitoring entire car controller, once find there is abnormal situation, trouble light (Malfunction Indication
Lamp, abbreviation MIL) emergency warning lamp is bright, fault message can be stored in memory by OBD system simultaneously, by the diagnostic instrments of standard and
Diagnosis interface can read relevant information in the form of DTC.According to the prompting of DTC, maintenance personal can be quickly and accurately
Determine property and the position of fault.
Because the fault that car load integrated manipulator is responsible for diagnosing gets more and more, freeze the fault messages such as frame information also increasingly
Many, if to each it may happen that fault, all random access memory (Random Access Memory, referred to as
RAM reserve storage fault message in space in), then the ram space of car load integrated manipulator is by wretched insufficiency.Additionally, at present
Entire car controller typically can use the ram space of regular length to store the fault message of fixed qty, only when electricity under car load, will
In fault message write EEPROM.And in car load running, if the fault message of storage is excessive in RAM, there is new event
During barrier, then new fault message can cover original fault message, so that fault message record is not comprehensive.
Content of the invention
Embodiments provide a kind of method and device of fault message storage, transported with the car load solving prior art
The limited problem of fault message stored number during row.
In order to solve above-mentioned technical problem, the present invention adopts the following technical scheme that：
A kind of first aspect, there is provided method of fault message storage, including：
Detection is currently needed for the data volume of the fault message of storage；
For storing the residual capacity of the first storage region of fault message in detection automobile random access memory；
If the difference of the residual capacity of the described data volume of fault message being currently needed for storing and described first storage region
Value more than or equal to the first preset value and is less than the second preset value, then by the fault message of storage in described first storage region
Completely or partially it is transferred in EEPROM EEPROM, the described fault message being currently needed for storing is deposited
Store up to described first storage region.
The method of fault message storage provided in an embodiment of the present invention, the fault that can break down in complete documentation is believed
The fault message of new fault while breath, can be stored again in time, improve the utilization rate of memory space.
Further, it is used for storing the surplus of the first storage region of fault message in described detection automobile random access memory
After the step of covolume amount, methods described also includes：
If the difference of the residual capacity of the described data volume of fault message being currently needed for storing and described first storage region
Value is more than or equal to the second preset value, then deposit the described partial fault information Store being currently needed for storing at random in described automobile
In second storage region of reservoir；
Wherein, described partial fault information is：In the described fault message being currently needed for storing, exceed the event of residual capacity
The fault message of unnecessary described second preset value quantity part in barrier information.
Further, it is transferred in EEPROM in the described fault message by storage in described first storage region, will
During the described fault message being currently needed for storing stores to described first storage region, methods described also includes：
The fault newly writing described first storage region is recorded in the 3rd storage region of described automobile random access memory
The storage location of information, newly write the storage location of the fault message of described second storage region, and update storage location and send out
The storage location of the fault message of changing.
Further, it is transferred in EEPROM in the described fault message by storage in described first storage region, will
After the described fault message being currently needed for storing stores the step to described first storage region, methods described also includes：
The reading instruction of detection read failure information；
According to the storage location information recording fault message in described 3rd storage region, determine that described reading instruction is wanted
The storage location of the fault message reading；
Read failure information from the storage location determining.
Further, described by described be currently needed for store fault message store the step to described first storage region
Rapid inclusion：
By the DTC, malfunction and the freeze frame information Store that are currently needed for storing in described first storage region
In.
Further, described by described be currently needed for store fault message store the step to described first storage region
Rapid inclusion：
By the sequence number of the DTC being currently needed for storing, malfunction and freeze frame information Store in the described first storage
In region；
Wherein, the serial number of described DTC：When defining the DTC of each fault, the numbering to each DTC.
A kind of second aspect, there is provided device of fault message storage, including：
First detection module, is currently needed for the data volume of the fault message of storage for detection；
Second detection module, is used in automobile random access memory storing the first storage region of fault message for detecting
Residual capacity；
First processing module, for described being currently needed for data volume and described first memory block of the fault message storing
When the difference of the residual capacity in domain is more than or equal to the first preset value and is less than the second preset value, by described first storage region
The fault message of storage is completely or partially transferred in EEPROM EEPROM, is currently needed for described
The fault message of storage stores to described first storage region.
The device of fault message storage provided in an embodiment of the present invention, the fault that can break down in complete documentation is believed
The fault message of new fault while breath, can be stored again in time, improve the utilization rate of memory space.
Further, described device also includes：
Second processing module, for described being currently needed for data volume and described first memory block of the fault message storing
When the difference of the residual capacity in domain is more than or equal to the second preset value, by the described partial fault information Store being currently needed for and storing
In the second storage region of described automobile random access memory；
Wherein, described partial fault information is：In the described fault message being currently needed for storing, exceed the event of residual capacity
The fault message of unnecessary described second preset value quantity part in barrier information.
Further, described device also includes：
Logging modle, deposits for recording new write described first in the 3rd storage region of described automobile random access memory
The storage location of the storage location of the fault message in storage area domain, the newly fault message of described second storage region of write, Yi Jigeng
The storage location of the fault message that new storage location changes.
Further, described device also includes：
3rd detection module, the reading for detecting read failure information instructs；
Determining module, for according to the storage location information recording fault message in described 3rd storage region, determining institute
State the storage location reading instruction fault message to be read；
Read module, for read failure information from the storage location determining.
Further, described first processing module specifically for：By be currently needed for store DTC, malfunction and
Freeze frame information Store is in described first storage region.
Further, described first processing module specifically for：By the sequence number of the DTC being currently needed for storing, fault shape
State and freeze frame information Store are in described first storage region；
Wherein, the serial number of described DTC：When defining the DTC of each fault, the numbering to each DTC.
The invention has the beneficial effects as follows：
Whether technique scheme, by detecting the data volume of new fault message, thus judge to have in RAM enough may be used
Memory space, when an insufficient storage space exists, the fault message of storage in RAM is transferred to EEPROM, thus discharging RAM
Memory space to store new fault message, so, while the fault message that complete documentation has broken down, and
The fault message of new fault can be stored in time, improve the utilization rate of memory space.
Brief description
The flow chart that Fig. 1 represents the method for fault message storage that first embodiment of the invention provides；
The flow chart that Fig. 2 represents the method for read failure information that first embodiment of the invention provides；
Fig. 3 represents the block diagram of the device of fault message storage that second embodiment of the invention provides.
Specific embodiment
It is more fully described the exemplary embodiment of the present invention below with reference to accompanying drawings.Although showing the present invention in accompanying drawing
Exemplary embodiment it being understood, however, that may be realized in various forms the present invention and should not be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to be able to be best understood from the present invention, and can be by the scope of the present invention
Complete conveys to those skilled in the art.
First embodiment
Embodiments provide a kind of method of fault message storage, as shown in figure 1, including：
S101, detection are currently needed for the data volume of the fault message of storage.
Whether in the embodiment of the present invention, can detect currently to have in real time or regularly needs the fault message of storage, Yi Jixu
The data volume of fault message to be stored.
For storing the residual capacity of the first storage region of fault message in S102, detection automobile random access memory.
In the embodiment of the present invention, can work as after the fault message currently with needs storage is detected, detection automobile is random
Memory (hereinafter referred to as RAM) is used for storing the residual capacity of the first storage region of fault message, to determine the first memory block
Whether the residual capacity in domain can store the fault message being currently needed for storing；Can also be currently whether to there are needs in detection
While the data volume of fault message of the fault message of storage and needs storage, the remaining appearance of detection the first storage region
Amount, to improve processing speed.Of course, it should be understood that other achievable modes can also be adopted, concrete condition, can be according to reality
Border demand selects.
If the data volume of fault message that S103 is currently needed for storing is big with the difference of the residual capacity of the first storage region
In or be equal to the first preset value and be less than the second preset value, then by the fault message of storage in the first storage region all or portion
Divide and be transferred in EEPROM EEPROM, the fault message being currently needed for storing is stored to the first storage
In region.
In the embodiment of the present invention, need the fault message of storage and the fault message needing storage when determining currently to have
Data volume when, the difference relationship of the residual capacity of the data volume of the fault message storing as needed and the first storage region,
It is further processed.
The data volume of the fault message if desired storing is pre- less than first with the difference of the residual capacity of the first storage region
If value, then directly the fault message needing storage is stored in the first storage region.Wherein, needs storage described here
The data volume of fault message is that the data volume needing the fault message storing subtracts with the difference of the residual capacity of the first storage region
Go the difference of the residual capacity of the first storage region.First preset value is a numerical value less than or equal to 0, the choosing of concrete data
Take and can determine according to the actual requirements.Difference is less than the first preset value and illustrates that the residual capacity of the first storage region be enough to store currently
Need the fault message of storage.
The data volume of the fault message if desired storing is more than or equal to the difference of the residual capacity of the first storage region
First preset value and be less than or equal to the second preset value, then need by the fault message of storage in the first storage region all or portion
Divide and be transferred in EEPROM, the fault message being currently needed for storing is stored to the first storage region.So, it is in car load
During running status, can either the fault message that broken down of complete documentation, the storage that again can discharge the first storage region is empty
Between, to store the fault message of new fault, realize the multiplexing of the first memory space.
Wherein, the second preset value is a numerical value more than 0, and the selection of concrete data can determine according to the actual requirements.Enter
The purpose that row second preset value limits is：Ensure can to have in the first storage region enough can memory space storage new
Fault message, therefore when difference is more than or equal to the first preset value and less than the second preset value, for ensureing the first storage region
Can have the new fault message of enough residual capacity storages, need to will be whole for the fault message of storage in the first storage region
Or part is transferred in EEPROM, the fault message being currently needed for storing is stored to the first storage region.
Need certain time due to the fault message in the first storage region is transferred to EEPROM, therefore process for reduction
Time, when in the new fault message of guarantee can store completely to the first storage region, can only partial fault information be shifted
To EEPROM.As when in the first storage region existing 80% memory space occupied, when needing transfer part fault message
When being transferred in EEPROM, can only transferase 45 0% quantity fault message, the fault message for remaining 30% quantity do not carry out
Transfer.
Further, if being currently needed for the difference of the residual capacity of the data volume of fault message and the first storage region storing
Value is more than or equal to the second preset value, then will be currently needed for the partial fault information Store storing in second storage region of RAM
In.This second storage region is a reserved buffer area, when the fault message being currently needed for storing is excessive, and in the first storage region
When the fault message of storage has little time all to write EEPROM, can temporarily partly new fault message be stored to the second storage
In region, to avoid the loss of fault message.In subsequent process, the fault message in the second storage region can be transferred to first
In storage region or in EEPROM, concrete condition, can design according to the actual requirements.
Wherein, partial fault information described here is：It is currently needed in the fault message storing, exceed residual capacity
The fault message of unnecessary second preset value quantity part in fault message.
Further, in the embodiment of the present invention, fault message includes：DTC (or sequence number of DTC), malfunction
And freeze frame information etc..Therefore, storage fault message is by the DTC (or sequence number of DTC) being currently needed for storing, event
Barrier state and freeze frame information Store are in the first storage region or the second storage region.
Wherein, the serial number of DTC described here：When defining the DTC of each fault, the volume to each DTC
Number.For example, defined in flash memory (Flash EEPROM Memory, abbreviation FLASH) during the DTC of each fault, to fault
Code division is not ranked up numbering, and so both having facilitated the record of fault message, and simultaneously because only needing record number, therefore can reduce number
According to the occupancy to memory space.
Further, in the embodiment of the present invention, for the ease of failure diagnostic apparatus read failure information, can be the 3rd of RAM the
The new storage location of fault message writing the first storage region, the new fault writing the second storage region is recorded in storage region
The storage location of information, and update the storage location of the fault message that storage location changes.
Wherein, as shown in Figure 2, it is determined whether there is the operation of read failure information and the realization side processing reading process
Method is：
S201, the reading instruction of detection read failure information, if existing, enter S202.
Wherein, entire car controller can be periodically detected and whether follow unified diagnostic service (Unified Diagnostic
Services, abbreviation UDS) agreement failure diagnostic apparatus read failure information instruction.
S202, the storage location information according to record fault message in the 3rd storage region, determine that reading instruction will read
The storage location of the fault message taking.
In query script, can first judging whether fault message to be read is stored in EEPROM, if existing, entering
Enter S203；If not existing, judge whether fault message to be read is stored in first storage region of RAM, if existing,
Then entering S203, if not existing, judging whether fault message to be read is stored in second storage region of RAM, if
Exist, then enter S203.
S203, from determine storage location read failure information.
This step is according to the judgement of S202, read failure information from the storage location determining.
In sum, the method for fault message storage provided in an embodiment of the present invention, by detecting new fault message
Data volume, thus judging whether there is available enough memory space in RAM, when an insufficient storage space exists, will store in RAM
Fault message be transferred to EEPROM, thus discharging the memory space of RAM, to store new fault message, so, complete
While recording the fault message having broken down, the fault message of new fault can be stored again in time, improve memory space
Utilization rate.
Second embodiment
Embodiments provide a kind of device of fault message storage, as shown in figure 3, including：
First detection module 301, is currently needed for the data volume of the fault message of storage for detection.
In the embodiment of the present invention, whether first detection module 301 can detect currently to have in real time or regularly needs storage
Fault message, and need the data volume of the fault message of storage.
Second detection module 302, is used in automobile random access memory storing the first memory block of fault message for detecting
The residual capacity in domain.
In the embodiment of the present invention, first detection module 301 can be worked as and the fault message currently with needs storage is detected
Afterwards, detect automobile random access memory (hereinafter referred to as RAM) for storing the first storage of fault message by the second detection module 302
Whether the residual capacity in region, can store the fault letter being currently needed for storing with the residual capacity determining the first storage region
Breath；Can also detect that the fault message currently whether with needs storage and needs store in first detection module 301
While the data volume of fault message, detected the residual capacity of the first storage region by the second detection module 302, to improve process
Speed.Of course, it should be understood that other achievable modes, concrete condition can also be adopted, can select according to the actual requirements.
First processing module 303, for data volume and first storage region of fault message that are currently needed for storing
The difference of residual capacity is more than or equal to the first preset value and during less than the second preset value, by storage in the first storage region
Fault message is completely or partially transferred in EEPROM EEPROM, by the fault letter being currently needed for storing
Breath stores to the first storage region.
In the embodiment of the present invention, need fault message and the need of storage when first detection module 301 determines currently to have
During the data volume of fault message to be stored, the data volume of the fault message that first processing module 303 can store as needed with
The difference relationship of the residual capacity of the first storage region, is further processed.
The data volume of the fault message if desired storing is pre- less than first with the difference of the residual capacity of the first storage region
If during value, then directly the fault message needing storage is stored in the first storage region.Wherein, described here need to store
The residual capacity of the data volume of fault message and the first storage region difference be the fault message needing storage data volume
Deduct the difference of the residual capacity of the first storage region.First preset value is a numerical value less than or equal to 0, concrete data
Selection can determine according to the actual requirements.Difference is less than the first preset value and illustrates that the residual capacity of the first storage region is worked as enough to store
The front fault message needing storage.
The data volume of the fault message if desired storing is more than or equal to the difference of the residual capacity of the first storage region
First preset value and be less than or equal to the second preset value, then need by the fault message of storage in the first storage region all or portion
Divide and be transferred in EEPROM, the fault message being currently needed for storing is stored to the first storage region.So, it is in car load
During running status, can either the fault message that broken down of complete documentation, the storage that again can discharge the first storage region is empty
Between, to store the fault message of new fault, realize the multiplexing of the first memory space.
Wherein, the second preset value is a numerical value more than 0, and the selection of concrete data can determine according to the actual requirements.Enter
The purpose that row second preset value limits is：Ensure can to have in the first storage region enough can memory space storage new
Fault message, therefore when difference is more than or equal to the first preset value and less than the second preset value, for ensureing the first storage region
Can have the new fault message of enough residual capacity storages, need to will be whole for the fault message of storage in the first storage region
Or part is transferred in EEPROM, the fault message being currently needed for storing is stored to the first storage region.
Need certain time due to the fault message in the first storage region is transferred to EEPROM, therefore process for reduction
Time, when in the new fault message of guarantee can store completely to the first storage region, can only partial fault information be shifted
To EEPROM.As when in the first storage region existing 80% memory space occupied, when needing transfer part fault message
When being transferred in EEPROM, can only transferase 45 0% quantity fault message, the fault message for remaining 30% quantity do not carry out
Transfer.
Further, this device also includes：
Second processing module, for being currently needed for the data volume of fault message and the residue of the first storage region that store
When the difference of capacity is more than or equal to the second preset value, the partial fault information Store being currently needed for storing is deposited at random in automobile
In second storage region of reservoir.
This second storage region is a reserved buffer area, when the fault message being currently needed for storing is excessive, and the first storage
When in region, the fault message of storage has little time all to write EEPROM, can temporarily will be partly new by Second processing module
Fault message stores to the second storage region, to avoid the loss of fault message.In subsequent process, can be by the second storage region
In fault message be transferred in the first storage region or in EEPROM, concrete condition, can design according to the actual requirements.
Wherein, partial fault information described here is：It is currently needed in the fault message storing, exceed residual capacity
The fault message of unnecessary second preset value quantity part in fault message.
Further, in the embodiment of the present invention, fault message includes：DTC (or sequence number of DTC), malfunction
And freeze frame information etc..Therefore, first processing module 303 specifically for：By DTC (or the DTC being currently needed for storing
Sequence number), malfunction and freeze frame information etc. and be stored in the first storage region or the second storage region.
Wherein, the serial number of DTC described here：When defining the DTC of each fault, the volume to each DTC
Number.For example, defined in flash memory (Flash EEPROM Memory, abbreviation FLASH) during the DTC of each fault, to fault
Code division is not ranked up numbering, and so both having facilitated the record of fault message, and simultaneously because only needing record number, therefore can reduce number
According to the occupancy to memory space.
Further, this device also includes：
Logging modle, for recording new write the first storage region in the 3rd storage region of automobile random access memory
The storage location of fault message, the storage location of the fault message of new write the second storage region, and update storage location and send out
The storage location of the fault message of changing.
For the ease of failure diagnostic apparatus read failure information, when storing fault message, can by logging modle by each
The storage location information record of the corresponding fault message of fault in the 3rd storage region of RAM to inquire about.
Further, this device also includes：
3rd detection module, the reading for detecting read failure information instructs.
Wherein, the 3rd detection module can be periodically detected and whether follow unified diagnostic service (Unified
Diagnostic Services, abbreviation UDS) agreement failure diagnostic apparatus read failure information instruction.
Determining module, for according to the storage location information recording fault message in the 3rd storage region, determining that reading refers to
Make the storage location of fault message to be read.
In determining module query script, can first judge whether fault message to be read is stored in EEPROM, if
Existing, then read failure information from this storage region, if not existing, judging whether fault message to be read is stored in
In first storage region of RAM, if existing, read failure information from this storage region；If still not existing, judge to be wanted
Whether the fault message reading is stored in second storage region of RAM.
Read module, for read failure information from the storage location determining.
Read module can from storage location determined by determining module read failure information.
In sum, the device of fault message storage provided in an embodiment of the present invention, by detecting new fault message
Data volume, thus judging whether there is available enough memory space in RAM, when an insufficient storage space exists, will store in RAM
Fault message be transferred to EEPROM, thus discharging the memory space of RAM, to store new fault message, so, complete
While recording the fault message having broken down, the fault message of new fault can be stored again in time, improve memory space
Utilization rate.
Above-described is the preferred embodiment of the present invention it should be pointed out that the ordinary person for the art comes
Say, some improvements and modifications can also be made under the premise of without departing from principle of the present invention, these improvements and modifications also exist
In protection scope of the present invention.
Claims (12)
1. a kind of method of fault message storage is it is characterised in that include：
Detection is currently needed for the data volume of the fault message of storage；
For storing the residual capacity of the first storage region of fault message in detection automobile random access memory；
If the described data volume of fault message being currently needed for storing is big with the difference of the residual capacity of described first storage region
In or be equal to the first preset value and be less than the second preset value, then will be whole for the fault message of storage in described first storage region
Or part be transferred in EEPROM EEPROM, by described be currently needed for store fault message store to
In described first storage region.
2. the method for fault message storage according to claim 1 is it is characterised in that detect automobile random storage described
After being used for the step of the residual capacity of the first storage region storing fault message in device, methods described also includes：
If the described data volume of fault message being currently needed for storing is big with the difference of the residual capacity of described first storage region
In or be equal to the second preset value, then by described be currently needed for store partial fault information Store in described automobile random access memory
The second storage region in；
Wherein, described partial fault information is：In the described fault message being currently needed for storing, exceed the fault letter of residual capacity
The fault message of unnecessary described second preset value quantity part in breath.
3. the method for fault message according to claim 2 storage is it is characterised in that described by described first memory block
In domain, the fault message of storage is transferred in EEPROM, and the described fault message being currently needed for storing is stored to described first
During in storage region, methods described also includes：
The fault message newly writing described first storage region is recorded in the 3rd storage region of described automobile random access memory
Storage location, newly write the storage location of the fault message of described second storage region, and update storage location and become
The storage location of the fault message changed.
4. the method for fault message according to claim 3 storage is it is characterised in that described by described first memory block
In domain, the fault message of storage is transferred in EEPROM, and the described fault message being currently needed for storing is stored to described first
After step in storage region, methods described also includes：
The reading instruction of detection read failure information；
According to the storage location information recording fault message in described 3rd storage region, determine that described reading instructs and will read
Fault message storage location；
Read failure information from the storage location determining.
5. method according to claim 1 is it is characterised in that described store the described fault message being currently needed for storing
Step to described first storage region includes：
By the DTC, malfunction and the freeze frame information Store that are currently needed for storing in described first storage region.
6. method according to claim 1 is it is characterised in that described store the described fault message being currently needed for storing
Step to described first storage region includes：
By the sequence number of the DTC being currently needed for storing, malfunction and freeze frame information Store in described first storage region
In；
Wherein, the serial number of described DTC：When defining the DTC of each fault, the numbering to each DTC.
7. a kind of device of fault message storage is it is characterised in that include：
First detection module, is currently needed for the data volume of the fault message of storage for detection；
Second detection module, is used in automobile random access memory storing the residue of the first storage region of fault message for detecting
Capacity；
First processing module, for data volume and described first storage region of fault message that ought described be currently needed for storing
When the difference of residual capacity is more than or equal to the first preset value and is less than the second preset value, will deposit in described first storage region
The fault message of storage is completely or partially transferred in EEPROM EEPROM, is currently needed for storing by described
Fault message store to described first storage region.
8. the device of fault message storage according to claim 7 is it is characterised in that described device also includes：
Second processing module, for data volume and described first storage region of fault message that ought described be currently needed for storing
When the difference of residual capacity is more than or equal to the second preset value, by the described partial fault information Store being currently needed for storing in institute
State in the second storage region of automobile random access memory；
Wherein, described partial fault information is：In the described fault message being currently needed for storing, exceed the fault letter of residual capacity
The fault message of unnecessary described second preset value quantity part in breath.
9. the device of fault message storage according to claim 8 is it is characterised in that described device also includes：
Logging modle, newly writes described first memory block for recording in the 3rd storage region of described automobile random access memory
The storage location of the fault message in domain, newly write the storage location of the fault message of described second storage region, and update and deposit
Storage space puts the storage location of the fault message changing.
10. the device of fault message storage according to claim 9 is it is characterised in that described device also includes：
3rd detection module, the reading for detecting read failure information instructs；
Determining module, for according to the storage location information recording fault message in described 3rd storage region, determining described reading
The storage location of instruction fetch fault message to be read；
Read module, for read failure information from the storage location determining.
11. devices according to claim 7 it is characterised in that described first processing module specifically for：To be currently needed for
The DTC of storage, malfunction and freeze frame information Store are in described first storage region.
12. devices according to claim 7 it is characterised in that described first processing module specifically for：To be currently needed for
The sequence number of DTC of storage, malfunction and freeze frame information Store are in described first storage region；
Wherein, the serial number of described DTC：When defining the DTC of each fault, the numbering to each DTC.
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