CN112599172A - Data writing method and device of electronic control unit and storage medium - Google Patents
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- 238000004590 computer program Methods 0.000 claims description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/10—Programming or data input circuits
- G11C16/102—External programming circuits, e.g. EPROM programmers; In-circuit programming or reprogramming; EPROM emulators
- G11C16/105—Circuits or methods for updating contents of nonvolatile memory, especially with 'security' features to ensure reliable replacement, i.e. preventing that old data is lost before new data is reliably written
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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
- G06F3/0604—Improving or facilitating administration, e.g. storage management
- G06F3/0607—Improving or facilitating administration, e.g. storage management by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
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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
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
- G06F3/0658—Controller construction arrangements
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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
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0673—Single storage device
- G06F3/0679—Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/26—Sensing or reading circuits; Data output circuits
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Abstract
The application discloses a data writing method and device of an electronic control unit and a storage medium. The method comprises the following steps: periodically reading a new data receiving state value of the electrified erasable programmable read-only memory EEP; when the received new data state value is read to be a first value, the writing operation state value of the EEP is read periodically, and meanwhile, the received new data state value is reset to be a second value; when the read write operation state value is the second value, starting to execute the write operation of writing new data into the EEP, and simultaneously setting the write operation state value as the first value; and when the write operation is finished, setting the write operation state value as a second value. The method carries out EEP write operation management according to the received new data state value and the write operation state value of the EEP, and can ensure that if new data is received in the process of carrying out write operation on the EEP, the write operation can be carried out again after the last write operation is finished, so that the newly received data can be written into the electrified erasable programmable read only memory.
Description
Technical Field
The application relates to the technical field of vehicle-mounted computers, in particular to a data writing method and device of an electronic control unit and a storage medium.
Background
When the electronic control engine is in a test run or is off-line in a whole vehicle factory, related data needs to be written into the electronic control unit ECU through a service tool, and meanwhile, the related data is stored in the electronic control unit ECU. The data written in the ECU comprises a plurality of information such as ECU software version number, engine number, order number and the like. When the service tool writes data into the ECU, a plurality of pieces of information to be written are mainly written into the service tool interface, a write request is initiated by one key, and a plurality of pieces of data are sequentially written into the ECU. When the service tool continuously sends a data writing command to the electronic control unit ECU, the situation that written data cannot be stored in the EEP is occasionally existed. When the electronic control unit receives new data to be stored, the electronic control unit receives a new data state variable set to be 1. And when the function of the charged erasable programmable read-only memory detects that the state of receiving new data is set to be 1, the function of the charged erasable programmable read-only memory starts to write the storage area of the charged erasable programmable read-only memory. After the whole area is stored, the state of the received new data is set to 0. The method comprises the steps that time is needed for writing operation of a storage area of the electrified erasable programmable read-only memory, if new data to be stored is received in the process of writing operation of the storage area of the electrified erasable programmable read-only memory, the function of the electrified erasable programmable read-only memory cannot execute new writing operation due to the fact that the state variable of the received new data is always 1, and the newly received data to be stored cannot be written into an electronic control unit.
Disclosure of Invention
The application aims to provide a data writing method and device of an electronic control unit and a storage medium. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to an aspect of an embodiment of the present application, there is provided a data writing method of an electronic control unit, including:
periodically reading a received new data state value of the electrified erasable programmable read-only memory;
when the received new data state value is read to be a first value, periodically reading the writing operation state value of the electrified erasable programmable read-only memory, and simultaneously resetting the received new data state value to be a second value; wherein the receiving the new data status value as a first value is in response to receiving new data;
when the writing operation state value is read to be a second value, starting to execute the writing operation of writing the new data into the electrified erasable programmable read only memory, and meanwhile setting the writing operation state value to be a first value;
and when the write operation is finished, setting the write operation state value as a second value.
Further, the method further comprises:
and when the writing operation state value is a first value, periodically reading the writing operation state value of the charged erasable programmable read-only memory, and stopping reading until the writing operation state value is read to be a second value.
Further, before the writing operation of writing the new data into the charged erasable programmable read only memory is started when the writing operation state value is the second value, the method further includes: the write operation request variable value is set to a first value.
Further, when the write operation status value is a second value, starting to perform a write operation of writing the new data into the charged erasable programmable read only memory, including: and when the write operation state value is a second value, judging whether the write operation request variable value is a first value, and if so, starting to execute the write operation of writing the new data into the electrified erasable programmable read only memory.
Further, the first value is 1 and the second value is 0; alternatively, the first value is 0 and the second value is 1.
According to another aspect of the embodiments of the present application, there is provided a data writing apparatus of an electronic control unit, including:
the first reading module is used for periodically reading a received new data state value of the electrified erasable programmable read only memory;
the second reading module is used for periodically reading the writing operation state value of the charged erasable programmable read-only memory and simultaneously resetting the received new data state value to a second value when the received new data state value is read to be the first value; wherein the receiving the new data status value as a first value is in response to receiving new data;
the writing operation module is used for starting to execute the writing operation of writing the new data into the electrified erasable programmable read-only memory when the second reading module reads that the writing operation state value is a second value, and meanwhile, setting the writing operation state value as a first value;
and the assignment module is used for setting the write operation state value as a second value when the write operation is finished.
Further, the second reading module is further configured to, when the read write operation status value is a first value, periodically read the write operation status value of the charged erasable programmable read only memory, and stop reading until the read write operation status value is a second value.
Further, the assignment module is further configured to set the value of the write operation request variable to a first value before the write operation module starts to perform a write operation of writing the new data into the eeprom when the second read module reads that the value of the write operation status is a second value.
Further, the write operation module is specifically configured to, when the write operation state value is a second value, determine whether the write operation request variable value is a first value, and if so, start to perform a write operation of writing the new data into the electrically erasable programmable read only memory.
According to another aspect of embodiments of the present application, there is provided a computer-readable storage medium having stored thereon a computer program which is executed by a processor to implement the data writing method of the electronic control unit described above.
The technical scheme provided by one aspect of the embodiment of the application can have the following beneficial effects:
according to the data writing method of the electronic control unit, the writing operation management of the electrified erasable programmable read-only memory is carried out according to the received new data state value and the writing operation state value of the electrified erasable programmable read-only memory, and therefore it can be guaranteed that in the process of carrying out writing operation on the electrified erasable programmable read-only memory, if new data are received, the writing operation can be carried out again after the last writing operation is completed, and the latest received data can be written into the electrified erasable programmable read-only memory.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the application, or may be learned by the practice of the embodiments. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 shows a flow chart of a data writing method of an electronic control unit of an embodiment of the present application;
fig. 2 shows a flow chart of a data writing method of an electronic control unit of another embodiment of the present application;
fig. 3 shows a block diagram of a data writing device of an electronic control unit according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. 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 application.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As shown in fig. 1, an embodiment of the present application provides a data writing method of an electronic control unit, including:
and S10, periodically reading the received new data state value of the electrified erasable programmable read only memory.
The reading period can be set according to actual needs, for example, it can be set to 5 seconds, 8 seconds, etc. The received new data state value of the electrified erasable programmable read-only memory (EEP) is read every other reading period.
S20, when the received new data state value is read to be a first value, periodically reading the write operation state value of the charged erasable programmable read-only memory, and simultaneously resetting the received new data state value to be a second value; wherein receiving the new data status value as the first value is responsive to receiving the new data, i.e., the receiving the new data status value changes to the first value when the new data is received.
In certain embodiments, the first value is 1 and the second value is 0; alternatively, the first value is 0 and the second value is 1.
For example, the first value is 1, the second value is 0, and when the received new data state value is read to be 1, the step of periodically reading the write operation state value of the charged erasable programmable read-only memory is started, and meanwhile, the received new data state value is reset to be 1. The period for reading the write operation state value of the EEP can also be set according to actual needs, and can be set to 3 seconds or 5 seconds, for example.
And S30, when the writing operation state value is read to be the second value, starting to execute the writing operation of writing the new data into the electrified erasable programmable read only memory, and simultaneously setting the writing operation state value to be the first value.
For example, when the write operation status value of the read EEP is 0, indicating that a write operation is currently available, a write operation for writing new data into the EEP storage area is started, and the write operation status value is set to 1, which indicates that a write operation is currently being performed, and newly received data cannot be written at this time.
And S40, setting the write operation state value as a second value when the write operation is finished.
When the write operation is finished, the write operation state value is set to 0 to indicate that no write operation is executed in the current EEP, and if new data exists, the EEP can be written.
In some embodiments, the data writing method of the electronic control unit further includes:
and when the writing operation state value is a first value, periodically reading the writing operation state value of the charged erasable programmable read-only memory, and stopping reading until the writing operation state value is read to be a second value.
For example, when the write operation status value is 1, the write operation status value of the EEP is periodically read, and until the write operation status value is read to be 0, the periodic reading of the EEP write operation status value is stopped. The period for reading the writing operation state value of the EEP can be set according to actual needs.
In some embodiments, as shown in fig. 2, before starting to perform a write operation of writing new data into the electrically erasable programmable read only memory when the write operation status value is the second value, the method further includes: the write operation request variable value is set to a first value. When the write operation state value is a second value, starting to perform a write operation of writing new data into the charged erasable programmable read-only memory, comprising: and when the write operation state value is a second value, judging whether the write operation request variable value is a first value, and if so, starting to execute the write operation of writing the new data into the electrified erasable programmable read only memory. And determining that the current state of the charged erasable programmable read-only memory is stable by setting the judgment write operation request variable value and the subsequent judgment write operation request variable value.
For example, the write operation request variable value is set to 1. And when the write operation state value is 0, judging whether the write operation request variable value is 1, and if so, starting to execute the write operation of writing new data into the EEP.
According to the data writing method of the electronic control unit, the writing operation management of the electrified erasable programmable read-only memory is carried out according to the received new data state value and the writing operation state value of the electrified erasable programmable read-only memory, and therefore it can be guaranteed that in the process of carrying out writing operation on the electrified erasable programmable read-only memory, if new data are received, the writing operation can be carried out again after the last writing operation is completed, and the latest received data can be written into the electrified erasable programmable read-only memory.
Another embodiment of the present application also provides a data writing apparatus of an electronic control unit, including:
the first reading module 10 is used for periodically reading a received new data state value of the charged erasable programmable read only memory;
a second reading module 20, configured to, when it is read that the received new data state value is a first value, periodically read the write operation state value of the charged erasable programmable read-only memory, and simultaneously reset the received new data state value to a second value; wherein the receiving the new data status value as a first value is in response to receiving new data;
the write operation module 30 is configured to start to perform a write operation of writing the new data into the electrically erasable and programmable read only memory when the second read module reads that the write operation status value is a second value, and set the write operation status value to a first value;
and the assignment module 40 is configured to set the write operation state value to a second value when the write operation is completed.
In some embodiments, the second reading module 20 is further configured to, when the read-write operation status value is a first value, periodically read the write operation status value of the electrically erasable programmable read only memory, and stop reading until the read-write operation status value is a second value.
In some embodiments, the assignment module 40 is further configured to set the value of the write operation request variable to the first value before the write operation module starts to perform the write operation of writing the new data into the electrically erasable programmable read only memory when the second reading module 20 reads that the value of the write operation status is the second value.
In some embodiments, the write operation module is specifically configured to determine whether the value of the write operation request variable is a first value when the value of the write operation status is a second value, and if so, start to perform a write operation of writing the new data into the eeprom.
Another embodiment of the present application provides a computer-readable storage medium on which a computer program is stored, the program being executed by a processor to implement the data writing method of the electronic control unit of any of the above embodiments.
It should be noted that:
the term "module" is not intended to be limited to a particular physical form. Depending on the particular application, a module may be implemented as hardware, firmware, software, and/or combinations thereof. Furthermore, different modules may share common components or even be implemented by the same component. There may or may not be clear boundaries between the various modules.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose devices may be used with the teachings herein. The required structure for constructing such a device will be apparent from the description above. In addition, this application is not directed to any particular programming language. It will be appreciated that a variety of programming languages may be used to implement the teachings of the present application as described herein, and any descriptions of specific languages are provided above to disclose the best modes of the present application.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the application, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
The above-mentioned embodiments only express the embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.
Claims (10)
1. A data writing method of an electronic control unit, comprising:
periodically reading a received new data state value of the electrified erasable programmable read-only memory;
when the received new data state value is read to be a first value, periodically reading the writing operation state value of the electrified erasable programmable read-only memory, and simultaneously resetting the received new data state value to be a second value; wherein the receiving the new data status value as a first value is in response to receiving new data;
when the writing operation state value is read to be a second value, starting to execute the writing operation of writing the new data into the electrified erasable programmable read only memory, and meanwhile setting the writing operation state value to be a first value;
and when the write operation is finished, setting the write operation state value as a second value.
2. The data writing method of an electronic control unit according to claim 1, characterized in that the method further comprises:
and when the writing operation state value is a first value, periodically reading the writing operation state value of the charged erasable programmable read-only memory, and stopping reading until the writing operation state value is read to be a second value.
3. The method according to claim 1, wherein before the writing operation of writing the new data into the electrically-charged erasable programmable read only memory is started when the writing operation state value is the second value, the method further comprises: the write operation request variable value is set to a first value.
4. The method according to claim 3, wherein the starting of the write operation for writing the new data into the electrically erasable and programmable read only memory when the write operation status value is the second value comprises: and when the write operation state value is a second value, judging whether the write operation request variable value is a first value, and if so, starting to execute the write operation of writing the new data into the electrified erasable programmable read only memory.
5. The data writing method of an electronic control unit according to claim 1, characterized in that the first value is 1 and the second value is 0; alternatively, the first value is 0 and the second value is 1.
6. A data writing apparatus of an electronic control unit, comprising:
the first reading module is used for periodically reading a received new data state value of the electrified erasable programmable read only memory;
the second reading module is used for periodically reading the writing operation state value of the charged erasable programmable read-only memory and simultaneously resetting the received new data state value to a second value when the received new data state value is read to be the first value; wherein the receiving the new data status value as a first value is in response to receiving new data;
the writing operation module is used for starting to execute the writing operation of writing the new data into the electrified erasable programmable read-only memory when the second reading module reads that the writing operation state value is a second value, and meanwhile, setting the writing operation state value as a first value;
and the assignment module is used for setting the write operation state value as a second value when the write operation is finished.
7. The apparatus as claimed in claim 6, wherein the second reading module is further configured to periodically read the status value of the writing operation of the electrically erasable and programmable read only memory when the status value of the writing operation is read as a first value, and stop reading until the status value of the writing operation is read as a second value.
8. The apparatus as claimed in claim 6, wherein the assignment module is further configured to set the value of the write request variable to a first value before the write operation module starts to perform the write operation of writing the new data into the eeprom when the second read module reads that the value of the write operation status is a second value.
9. The device as claimed in claim 6, wherein the write operation module is configured to determine whether the value of the write operation request variable is a first value when the value of the write operation status is a second value, and if so, start to perform the write operation of writing the new data into the eeprom.
10. A computer-readable storage medium on which a computer program is stored, characterized in that the program is executed by a processor to implement the data writing method of an electronic control unit according to any one of claims 1 to 5.
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| CN110879800A (en) * | 2018-09-05 | 2020-03-13 | 阿里巴巴集团控股有限公司 | Data writing, compressing and reading method, data processing method and device |
| CN111356094A (en) * | 2020-01-07 | 2020-06-30 | 北京简约纳电子有限公司 | SIM short message processing method and device |
| CN112053727A (en) * | 2020-08-20 | 2020-12-08 | 珠海格力电器股份有限公司 | EEPROM power-down protection control method, device, storage medium and storage equipment |
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