CN111090541A - Data loss prevention method and device for controller, driving computer equipment and storage medium - Google Patents
Data loss prevention method and device for controller, driving computer equipment and storage medium Download PDFInfo
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- CN111090541A CN111090541A CN201911266548.XA CN201911266548A CN111090541A CN 111090541 A CN111090541 A CN 111090541A CN 201911266548 A CN201911266548 A CN 201911266548A CN 111090541 A CN111090541 A CN 111090541A
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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
- G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
- G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
- G06F11/1004—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's to protect a block of data words, e.g. CRC or checksum
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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
- G06F11/1448—Management of the data involved in backup or backup restore
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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
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Abstract
The invention discloses a data loss prevention method and device of a controller, driving computer equipment and a storage medium, which divide memory data of the controller into a main data storage area and a backup data storage area, wherein the memory data storage writing of the controller comprises the following steps: judging whether data storage data need to be written or not; if yes, writing the data into the main data storage area; judging whether data storage data need to be backed up or not; if yes, writing the data into the backup data storage area. Compared with the prior art, the embodiment of the invention provides a data anti-loss method and device for a vehicle window anti-pinch controller, driving computer equipment and a storage medium.
Description
Technical Field
The invention relates to the technical field of electric vehicle window controllers, in particular to a method and a device for preventing memory data loss of an anti-pinch controller of an electric vehicle window, a driving computer device and a storage medium.
Background
In the field of electric vehicle window anti-pinch control, if a system of a driving computer is powered off (or abnormally powered off, wrong data writing or external EMI interference and the like) in the process of writing data into an EEPROM, a written EEPROM data area can be lost or made mistakes, and the wrong judgment on the position of a vehicle window or (and) anti-pinch force can cause anti-pinch failure; in order to improve the safety reliability, since ASIL B (functional safety class) is satisfied, the memory MEMROY (data FLASH or EEPROM, hereinafter referred to as "EEPROM") is subjected to loss-and-loss processing.
Disclosure of Invention
The embodiment of the invention provides a data loss prevention method and device for a vehicle window anti-pinch controller, a driving computer device and a storage medium, and aims to prevent the risk of losing errors when a driving computer reads and writes memory data.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
in a first aspect, the present invention provides a data loss prevention method for a controller, which divides memory data of the controller into a main data storage area and a backup data storage area, wherein the memory data storage writing of the controller includes the following steps:
judging whether data are required to be written into the data memory;
if yes, writing the data into the main data storage area;
judging whether data storage data need to be backed up or not;
if yes, writing the data into the backup data storage area.
The method further comprises a data storage and reading step, wherein the data storage and reading step comprises the following steps:
reading the main data storage area data;
judging whether the reading of the data in the main data storage area is successful or not;
if the data storage area fails, reading the data of the backup data storage area;
if the data in the backup data storage area is successfully read, taking the data in the backup data storage area as basic data for judging the anti-pinch strategy;
and rewriting the data of the backup data storage area into the main data storage area.
If the step of reading the data in the backup data storage area fails, default data prestored in the system is used as basic data for anti-pinch judgment.
If the step of reading the data in the main data storage area succeeds, the data in the main data storage area is used as basic data of an anti-pinch judgment strategy.
And when the data storage data is written in, a check code is set at the end of the data, a check value is calculated when the data storage data is read out, the calculated check value is compared with a check value stored in the data storage, if the calculated check value is consistent with the check value stored in the data storage, the data is valid, otherwise, the data is invalid.
In a second aspect, the present invention further provides a data loss prevention device for a controller, which includes a data writing unit, where the data writing unit includes:
the first judging unit is used for judging whether data storage data need to be written or not;
the main data writing unit is used for writing data into the main data storage area when the data storage data needs to be written;
the second judging unit is used for judging whether the data storage data need to be backed up or not;
and the backup data writing unit is used for writing the data into the backup data storage area when the data storage area needs to be backed up.
Wherein, still include the data reading unit, the data reading unit includes:
a main data reading unit for reading the main data storage area data;
a third judging unit for judging whether the reading of the data of the main data storage area is successful;
the backup data reading unit is used for reading the data of the backup data storage area when the main data reading unit fails to read;
the fourth judging unit is used for taking the data in the backup data storage area as basic data for judging the anti-pinch strategy if the data in the backup data storage area is read successfully;
and the rewriting unit is used for rewriting the data of the backup data storage area into the main data storage area.
In a third aspect, the present invention further provides a driving computer device, where the driving computer device includes a memory and a processor, where the memory stores a computer program, and the processor implements the method according to any one of the above descriptions when executing the computer program.
In a fourth aspect, the present invention also provides a storage medium storing a computer program comprising program instructions which, when executed by a processor, implement the method of any one of the above.
Compared with the prior art, the embodiment of the invention provides a data anti-loss method and device for a vehicle window anti-pinch controller, driving computer equipment and a storage medium.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flow chart of a write data storage portion of a data anti-loss method of a vehicle window anti-pinch controller according to an embodiment of the present invention;
fig. 2 is a flow chart of a read data storage portion of a data anti-loss method of a vehicle window anti-pinch controller according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a data loss prevention device of a controller according to an embodiment of the present invention; and
fig. 4 is a schematic block diagram of a driving computer device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1, the data loss prevention method of the controller divides the memory data of the anti-pinch controller of the power window into a main data storage area and a backup data storage area, wherein the memory data storage writing of the controller comprises the following steps:
step S101, judging whether data storage data need to be written or not; the data needing to be written in the data storage is environmental information acquired by the anti-pinch controller from the environment, and the data comprises environmental temperature, humidity, aging of vehicle window adhesive tapes, dust, wind power and other resistance influences. The anti-pinch strategy of the car window is judged according to the comprehensive data.
Step S102, if yes, writing the data into a main data storage area; firstly, data is written into a pre-partitioned main data storage area, and the main data storage area is used for normal reading and writing of the data.
Step S103, judging whether data storage data need to be backed up or not; in order to improve the accuracy of data reading, namely the read data is data such as newly monitored environmental factors, the written data is backed up and written into a backup data storage area.
And step S104, if so, writing the data into the backup data storage area. Not all written data in the memory of the anti-pinch controller need to be backed up, for example, data such as communication and operation parameters generally do not need to be backed up, so that only data which needs to be called by the controller at any time for anti-pinch strategy judgment is backed up.
The main data storage area and the backup data storage area both comprise an EEPROM, a DATAFLASH (data FLASH memory), a FLASH (FLASH memory) and the like.
Referring to fig. 2, fig. 2 is a data storage and reading step in the memory data discarding method of the controller, where the data storage and reading step includes:
step S201, reading main data storage area data; according to the preset logic, the anti-clamping controller firstly reads data from the main data storage area.
Step S202, judging whether the reading of the data of the main data storage area is successful; the minimum operation unit of the general data FLASH or the data storage data is 8 bytes, and the data storage and writing process is exemplified by the minimum operation unit of the data storage data of 8 bytes: the 8-byte data store is erased to 0xFF before the data is written to the data store. From this process, it can be analyzed that if the writing is not yet available after the erasing, or if a part of data is written, the power is suddenly turned off, the data in the data storage is wrong, and if the wrong data storage data is obtained for use, the consequences are very serious. In addition, the data store corresponds to which data region is manipulated, which data region is likely to be updated or lost. If the step of reading the data in the main data storage area succeeds, the data in the main data storage area is used as basic data of an anti-pinch judgment strategy.
Step S203, if the failure occurs, reading the data of the backup data storage area; that is, if the verification of the data read from the main data storage area fails, it indicates that the data is lost or damaged, and at this time, the data needs to be read from the backup data storage area.
And step S204, if the data in the backup data storage area is successfully read, taking the data in the backup data storage area as basic data for anti-pinch strategy judgment. And comparing the read real-time environmental factor data with various preset condition judgment data of the system, and finally making an anti-pinch action.
Step S205, the data of the backup data storage area is rewritten into the main data storage area. And if the primary data storage fails to be read for the first time, rewriting the data in the backup data storage area into the primary data storage area, and covering the lost or damaged data.
If the step of reading the data in the backup data storage area fails, default data prestored in the system is used as basic data for anti-pinch judgment. And if the data in the backup data storage area is lost or damaged, executing according to a strategy preset by system software, such as means of giving an alarm when a fault occurs or stopping the opening and closing of the power window.
The strategy for judging whether the read data is damaged or lost is as follows: and setting a check code at the end of the data every time when the data storage data is written, calculating a check value every time when the data storage data is read, comparing the calculated check value with a check value stored in the data storage, and if the calculated check value is consistent with the check value stored in the data storage, the data is valid, otherwise, the data is invalid.
Referring to fig. 3, the present invention further provides a data loss prevention device 001 of a controller, which includes a data writing unit 300, where the data writing unit 300 includes:
a first judgment unit 301, configured to judge whether data storage data needs to be written;
a main write data unit 302, configured to write data into a main data storage area when data storage data needs to be written;
a second judging unit 303, configured to judge whether data storage data needs to be backed up;
and a backup data writing unit 304, configured to write the data into the backup data storage area when the backup data storage area needs to store the data.
Further, a data reading unit 400 is also included, the data reading unit 400 includes:
a main data reading unit 401 for reading main data storage area data;
a third judging unit 402 for judging whether reading of the main data storage area data is successful;
a backup data reading unit 403, configured to read the backup data storage area data when the main data reading unit fails to read;
a fourth judging unit 404, configured to, if the data in the backup data storage region is successfully read, use the data in the backup data storage region as basic data for anti-pinch policy judgment;
a rewriting unit 405 for rewriting the backup data storage area data to the main data storage area.
Referring to fig. 4, the driving computer device 500 includes a processor 502, a memory and a network interface 505 connected by a system bus 501, wherein the memory may include a nonvolatile storage medium 503 and an internal memory 504.
The network interface 505 is used for network communication with other devices. It will be understood by those skilled in the art that the structure shown in fig. 4 is a block diagram of only a portion of the structure related to the present application, and does not constitute a limitation to the driving computer device 500 to which the present application is applied, and a specific driving computer device 500 may include more or less components than those shown in the drawings, or may combine some components, or have a different arrangement of components.
The non-volatile storage medium 503 may store an operating system 5031 and a computer program 5032. The computer program 5032 comprises program instructions that, when executed, cause the processor 502 to perform a method of data anti-loss for a window anti-pinch controller.
The processor 502 is used to provide computing and control capabilities to support the operation of the entire cycle computer apparatus 500.
The internal memory 504 provides an environment for the operation of the computer program 5032 in the non-volatile storage medium 503, and when the computer program 5032 is executed by the processor 502, the processor 502 can perform the following steps:
step S101, judging whether data storage data need to be written or not; the data needing to be written in the data storage is environmental information acquired by the anti-pinch controller from the environment, and the data comprises environmental temperature, humidity, aging of vehicle window adhesive tapes, dust, wind power and other resistance influences. The anti-pinch strategy of the car window is judged according to the comprehensive data.
Step S102, if yes, writing the data into a main data storage area; firstly, data is written into a pre-partitioned main data storage area, and the main data storage area is used for normal reading and writing of the data.
Step S103, judging whether data storage data need to be backed up or not; in order to improve the accuracy of data reading, namely the read data is data such as newly monitored environmental factors, the written data is backed up and written into a backup data storage area.
And step S104, if so, writing the data into the backup data storage area. Not all written data in the memory of the anti-pinch controller need to be backed up, for example, data such as communication and operation parameters generally do not need to be backed up, so that only data which needs to be called by the controller at any time for anti-pinch strategy judgment is backed up.
Referring to fig. 2, a data storage and reading step in the memory data discarding method of the controller is shown, where the data storage and reading step includes:
step S201, reading main data storage area data; according to the preset logic, the anti-clamping controller firstly reads data from the main data storage area.
Step S202, judging whether the reading of the data of the main data storage area is successful; the minimum operation unit of the general data FLASH or the data storage data is 8 bytes, and the data storage and writing process is exemplified by the minimum operation unit of the data storage data of 8 bytes: the 8-byte data store is erased to 0xFF before the data is written to the data store. From this process, it can be analyzed that if the writing is not yet available after the erasing, or if a part of data is written, the power is suddenly turned off, the data in the data storage is wrong, and if the wrong data storage data is obtained for use, the consequences are very serious. In addition, the data store corresponds to which data region is manipulated, which data region is likely to be updated or lost. If the step of reading the data in the main data storage area succeeds, the data in the main data storage area is used as basic data of an anti-pinch judgment strategy.
Step S203, if the failure occurs, reading the data of the backup data storage area; that is, if the verification of the data read from the main data storage area fails, it indicates that the data is lost or damaged, and at this time, the data needs to be read from the backup data storage area.
And step S204, if the data in the backup data storage area is successfully read, taking the data in the backup data storage area as basic data for anti-pinch strategy judgment. And comparing the read real-time environmental factor data with various preset condition judgment data of the system, and finally making an anti-pinch action.
Step S205, the data of the backup data storage area is rewritten into the main data storage area. And if the primary data storage fails to be read for the first time, rewriting the data in the backup data storage area into the primary data storage area, and covering the lost or damaged data.
If the step of reading the data in the backup data storage area fails, default data prestored in the system is used as basic data for anti-pinch judgment. And if the data in the backup data storage area is lost or damaged, executing according to a strategy preset by system software, such as means of giving an alarm when a fault occurs or stopping the opening and closing of the power window.
The strategy for judging whether the read data is damaged or lost is as follows: and setting a check code at the end of the data every time when the data storage data is written, calculating a check value every time when the data storage data is read, comparing the calculated check value with a check value stored in the data storage, and if the calculated check value is consistent with the check value stored in the data storage, the data is valid, otherwise, the data is invalid.
The present invention also provides a storage medium storing a computer program comprising program instructions which, when executed by a processor, implement a controller data discard method as follows: the method divides the memory data of the anti-clamping controller of the electric vehicle window into a main data storage area and a backup data storage area, wherein the memory data storage writing of the controller comprises the following steps:
step S101, judging whether data storage data need to be written or not;
step S102, if yes, writing the data into a main data storage area;
step S103, judging whether data storage data need to be backed up or not;
and step S104, if so, writing the data into the backup data storage area.
Wherein, the data storage and reading step comprises:
step S201, reading main data storage area data;
step S202, judging whether the reading of the data of the main data storage area is successful;
step S203, if the failure occurs, reading the data of the backup data storage area;
step S204, if the data in the backup data storage area is successfully read, taking the data in the backup data storage area as basic data for anti-pinch strategy judgment;
step S205, the data of the backup data storage area is rewritten into the main data storage area.
The storage medium may be a usb disk, a removable hard disk, a Read-Only Memory (ROM), a magnetic disk, or an optical disk, which can store various computer readable storage media.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative. For example, the division of each unit is only one logic function division, and there may be another division manner in actual implementation. For example, various elements or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented.
The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs. The units in the device of the embodiment of the invention can be merged, divided and deleted according to actual needs. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a storage medium. Based on such understanding, the technical solution of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for enabling a driving computer device (which may be a personal computer, a terminal, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention.
The above-mentioned embodiments are merely preferred examples of the present invention, and not intended to limit the present invention, and those skilled in the art can easily make various changes and modifications according to the main concept and spirit of the present invention, so that the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A data loss prevention method of a controller is characterized in that memory data of the controller is divided into a main data storage area and a backup data storage area, wherein data storage writing of the controller comprises the following steps:
judging whether data are required to be written into the data memory;
if yes, writing the data into the main data storage area;
judging whether data written into the data memory needs to be backed up or not;
if yes, writing the data into the backup data storage area.
2. The method of claim 1, further comprising a data storage reading step, wherein the data storage reading step comprises:
reading the main data storage area data;
judging whether the reading of the data in the main data storage area is successful or not;
if the data storage area fails, reading the data of the backup data storage area;
if the data in the backup data storage area is successfully read, taking the data in the backup data storage area as basic data for judging the anti-pinch strategy;
and rewriting the data of the backup data storage area into the main data storage area.
3. The method as claimed in claim 2, wherein if the step "reading data in the backup data storage area" fails, default data pre-stored in the system is used as basic data for anti-pinch judgment.
4. The method of claim 2, wherein if the step "reading the data in the main data storage area" is successful, the data in the main data storage area is used as the basic data of the anti-pinch judgment policy.
5. The method of claim 1, wherein each time data is written into the data memory, a check code is set at the end of the current data, a check value is calculated each time data is read from the data memory, the calculated check value is compared with a check value stored in the data memory, if the two check values are consistent, the data is valid, otherwise the data is invalid.
6. A data loss prevention device of a controller, comprising a write data storage unit, the write data storage unit comprising:
a first judgment unit for judging whether data is required to be written into the data memory;
the main data writing unit is used for writing data into the main data storage area when the data storage data needs to be written;
a second judging unit for judging whether data written in the data memory needs to be backed up;
and the backup data writing unit is used for writing the data into the backup data storage area when the data storage area needs to be backed up.
7. The data loss prevention device of a controller according to claim 6, further comprising a data storage reading unit, the data storage reading unit comprising:
a main data reading unit for reading the main data storage area data;
a third judging unit for judging whether the reading of the data of the main data storage area is successful;
the backup data reading unit is used for reading the data of the backup data storage area when the main data reading unit fails to read;
the fourth judging unit is used for taking the data in the backup data storage area as basic data for judging the anti-pinch strategy if the data in the backup data storage area is read successfully;
and the rewriting unit is used for rewriting the data of the backup data storage area into the main data storage area.
8. A vehicle computer device, comprising a memory having a computer program stored thereon and a processor that, when executed, implements the method of any of claims 1-5.
9. A storage medium, characterized in that the storage medium stores a computer program comprising program instructions which, when executed by a processor, implement the method according to any one of claims 1-5.
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| CN116541900A (en) * | 2023-07-07 | 2023-08-04 | 深圳星火半导体科技有限公司 | Storage management method, device, equipment and medium based on data protection |
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| CN109376031A (en) * | 2018-09-27 | 2019-02-22 | 潍柴动力股份有限公司 | A kind of method and device for preventing the verification erroneous judgement of the memory block EEPROM from occurring |
| CN109521960A (en) * | 2018-11-02 | 2019-03-26 | 格力电器（合肥）有限公司 | Data reading and writing method, device and system |
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| CN116541900A (en) * | 2023-07-07 | 2023-08-04 | 深圳星火半导体科技有限公司 | Storage management method, device, equipment and medium based on data protection |
| CN116541900B (en) * | 2023-07-07 | 2024-04-05 | 深圳星火半导体科技有限公司 | Storage management method, device, equipment and medium based on data protection |
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