CN114826818A - CAN message data processing method and device - Google Patents
CAN message data processing method and device Download PDFInfo
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- CN114826818A CN114826818A CN202210564478.1A CN202210564478A CN114826818A CN 114826818 A CN114826818 A CN 114826818A CN 202210564478 A CN202210564478 A CN 202210564478A CN 114826818 A CN114826818 A CN 114826818A
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- 238000012545 processing Methods 0.000 claims abstract description 58
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims abstract description 11
- 238000004590 computer program Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000006870 function Effects 0.000 description 7
- 230000003993 interaction Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 3
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- 238000012986 modification Methods 0.000 description 3
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- 230000008901 benefit Effects 0.000 description 2
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- 238000003379 elimination reaction Methods 0.000 description 2
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- 238000003491 array Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
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Abstract
The application provides a CAN message data processing method and a device, which are applied to a multimedia car machine and specifically comprise the following steps: acquiring CAN message data at the current moment, wherein the CAN message data is CAN message data sent by vehicle-mounted equipment; performing mask filtering on CAN message data at the current moment by using a preset mask table to obtain effective data; detecting whether the current time reaches preset data processing time of the vehicle-mounted equipment, and if so, acquiring current state information of the vehicle-mounted equipment from the effective data; and judging whether the current state information of the vehicle-mounted equipment and the last state information change or not, if so, uploading the current state information of the vehicle-mounted equipment to a display screen, and otherwise, discarding the current state information of the vehicle-mounted equipment. According to the method and the device, the CAN message data load of the multimedia car machine is reduced, the performance of the multimedia car machine is improved, and the user experience is improved.
Description
Technical Field
The application relates to the technical field of vehicle-mounted equipment, in particular to a CAN message data processing method and device.
Background
At present, the number of electronic devices of a vehicle is rapidly increased, and because the interaction data of each electronic device is more and more frequent, the data on a bus is greatly increased; the multi-media car machine is used as a main display and operation terminal for car body information interaction, the CAN data load is higher and higher, CAN data processing cannot be completed in time, the problem of system blockage is caused, and the user experience is reduced.
Disclosure of Invention
In view of this, the present application provides a method and an apparatus for processing CAN packet data, which CAN solve the technical problem of excessive multimedia vehicle-machine interaction data volume caused by a large data volume load of a vehicle machine.
In a first aspect, an embodiment of the present application provides a method for processing CAN packet data, applied to a multimedia vehicle, including:
acquiring CAN message data at the current moment, wherein the CAN message data is CAN message data sent by vehicle-mounted equipment;
performing mask filtering on CAN message data at the current moment by using a preset mask table to obtain effective data;
detecting whether the current time reaches preset data processing time of the vehicle-mounted equipment, and if so, acquiring current state information of the vehicle-mounted equipment from the effective data;
and judging whether the current state information of the vehicle-mounted equipment and the last state information change or not, if so, uploading the current state information of the vehicle-mounted equipment to a display screen, and otherwise, discarding the current state information of the vehicle-mounted equipment.
Further, the in-vehicle apparatus includes: the system comprises an instrument, a power unit controller, a vehicle body control unit, a battery management system, a wireless charging module, an atmosphere lamp module, a gateway, a radar module, an automatic parking system, an air conditioner and a panoramic all-around system.
Further, the step of generating the preset mask table includes:
and extracting the data bits of each vehicle-mounted device to be processed from the CAN message format of each vehicle-mounted device.
Further, mask filtering is carried out on CAN message data at the current moment by using a preset mask table to obtain effective data; the method comprises the following steps:
and AND-operating the CAN message data and the mask table at the current moment, and extracting the data with the operation result of 1 as effective data.
Further, the data processing time of the vehicle-mounted device includes: the method comprises the following steps of vehicle speed processing time, steering wheel corner processing time, engine rotating speed processing time, air conditioner temperature processing time, wheel speed pulse time, window switch progress time and charging and discharging current processing time.
Further, the detecting whether the current time reaches the preset data processing time of the vehicle-mounted device includes:
setting a timer for data processing of each vehicle-mounted device;
and detecting whether the current time reaches the preset data processing time of the vehicle-mounted equipment or not by using the timer.
In a second aspect, an embodiment of the present application provides a CAN packet data processing apparatus, which is applied to a multimedia vehicle, and includes:
the device comprises an acquisition unit, a processing unit and a processing unit, wherein the acquisition unit is used for acquiring CAN message data at the current moment, and the CAN message data is CAN message data sent by vehicle-mounted equipment;
the mask filtering unit is used for performing mask filtering on the CAN message data at the current moment by using a preset mask table to obtain effective data;
the timing processing unit is used for detecting whether the current time reaches the preset data processing time of the vehicle-mounted equipment, and if so, acquiring the current state information of the vehicle-mounted equipment from the valid data;
and the change detection unit is used for judging whether the current state information of the vehicle-mounted equipment and the last state information change or not, if so, uploading the current state information of the vehicle-mounted equipment to the display screen, and otherwise, discarding the current state information of the vehicle-mounted equipment.
In a third aspect, an embodiment of the present application provides an electronic device, including: the CAN message data processing method comprises a memory, a processor and a computer program which is stored on the memory and CAN run on the processor, wherein when the processor executes the computer program, the CAN message data processing method of the embodiment of the application is realized.
In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where computer instructions are stored, and when the computer instructions are executed by a processor, the method for processing CAN packet data according to the embodiment of the present application is implemented.
According to the method and the device, the CAN message data load of the multimedia car machine is reduced, the performance of the multimedia car machine is improved, and the user experience is improved.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a CAN message data processing method provided in an embodiment of the present application;
fig. 2 is a connection diagram of a multimedia vehicle machine and a vehicle-mounted device according to an embodiment of the present application;
fig. 3 is a functional structure diagram of a CAN message data processing apparatus according to an embodiment of the present application;
fig. 4 is a block diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the 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.
First, the design idea of the embodiment of the present application is briefly introduced.
At present, the number of electronic devices of a vehicle is rapidly increased, and because the interaction data of each electronic device is more and more frequent, the data on a bus is greatly increased; the multi-media car machine is used as a main display and operation terminal for car body information interaction, the CAN data load is higher and higher, CAN data processing cannot be completed in time, the problem of system blockage is caused, and the user experience is reduced.
In addition, under the circumstances that guarantee that data is accurate and real-time effectual, directly pack the automobile body data and upload to the multimedia host system in, the benefit that brings under the not high circumstances of data volume of doing so is: the data in the multimedia vehicle can be effectively recorded to the original data of the vehicle body, so that the function development is facilitated; however, when the data volume is large and the data change is frequent, the existing method can bring great performance influence to the data interaction load of the multimedia car machine, and the large data volume causes the system to be stuck, which causes the function failure.
The problem of low efficiency when the prior art is large in data processing amount and fast in data refreshing is solved; designing a mask filtering and time jitter elimination strategy aiming at the problems; firstly, data needing to be received by the multimedia car machine is analyzed, effective data of actual functions are arranged into mask configuration, and then the effective data are filtered out according to the mask, so that the influence of other invalid data or the data with invalid functions on the current multimedia car machine on communication interactive load is eliminated, and the load pressure is greatly reduced;
secondly, analyzing effective and frequently-changed data, performing a time jitter elimination strategy on the current data according to the actual time experience perception of the multimedia vehicle-mounted interactive function, presetting a receiving timer, performing time-limited processing on the data, reducing the number of data trigger refreshing times in unit time and reducing load pressure; the data load pressure of the multimedia vehicle machine is greatly optimized, the whole machine is not influenced, the performance of the multimedia vehicle machine is improved, and the user experience is improved.
After introducing the application scenario and the design concept of the embodiment of the present application, the following describes a technical solution provided by the embodiment of the present application.
As shown in fig. 1, an embodiment of the present application provides a method for processing CAN packet data, which is applied to a multimedia vehicle, and includes:
step 101: acquiring CAN message data at the current moment;
as shown in fig. 2, each vehicle-mounted device is connected to the multi-media car machine through a CAN bus, where the CAN message data at the current time is from the CAN message data sent by one vehicle-mounted device.
In this embodiment, the in-vehicle device includes: the system comprises an instrument, a power unit controller, a vehicle body control unit, a battery management system, a wireless charging module, an atmosphere lamp module, a gateway, a radar module, an automatic parking system, an air conditioner and a panoramic all-around system.
Step 102: performing mask filtering on CAN message data at the current moment by using a preset mask table to obtain effective data;
first, a preset mask table needs to be generated: and extracting the data bits of each vehicle-mounted device to be processed from the CAN message format of each vehicle-mounted device. And then, performing AND operation on the CAN message data at the current moment and the mask table, and extracting data with an AND operation result of 1 as effective data. The effective data are filtered out, the influence of other ineffective data or data ineffective to the current multimedia car machine function on the communication interaction load is eliminated, and the load pressure can be greatly reduced.
Step 103: detecting whether the current time reaches preset data processing time of the vehicle-mounted equipment, and if so, acquiring current state information of the vehicle-mounted equipment from the effective data;
wherein, the data processing time of the vehicle-mounted equipment comprises the following steps: the method comprises the following steps of vehicle speed processing time, steering wheel corner processing time, engine rotating speed processing time, air conditioner temperature processing time, wheel speed pulse time, window switch progress time and charging and discharging current processing time. For example, a vehicle speed refresh time is set to 100 milliseconds, a steering wheel angle data refresh time is set to 100 milliseconds, and an engine speed refresh time is set to 100 milliseconds.
In the present embodiment, a timer for data processing of each in-vehicle device is set; and detecting whether the current time reaches the preset data processing time of the vehicle-mounted equipment or not by using the timer. And the data is subjected to time-limited processing, so that the data triggering and refreshing times can be reduced in unit time.
Step 104: and judging whether the current state information of the vehicle-mounted equipment and the last state information change or not, if so, uploading the current state information of the vehicle-mounted equipment to a display screen, and otherwise, discarding the current state information of the vehicle-mounted equipment.
The step CAN further reduce the data volume uploaded by the CAN message data.
Based on the foregoing embodiment, an embodiment of the present application provides a CAN packet data processing apparatus, and referring to fig. 3, a CAN packet data processing apparatus 200 provided in the embodiment of the present application at least includes:
an obtaining unit 201, configured to obtain CAN message data at a current time, where the CAN message data is CAN message data sent by a vehicle-mounted device;
the mask filtering unit 202 is configured to perform mask filtering on the CAN message data at the current time by using a preset mask table to obtain valid data;
the timing processing unit 203 is used for detecting whether the current time reaches the preset data processing time of the vehicle-mounted equipment, and if so, acquiring the current state information of the vehicle-mounted equipment from the valid data;
and the change detection unit 204 is configured to determine whether the current state information of the vehicle-mounted device and the previous state information change, if so, upload the current state information of the vehicle-mounted device to the display screen, and otherwise, discard the current state information of the vehicle-mounted device.
It should be noted that the principle for solving the technical problem of the CAN message data processing apparatus 200 provided in the embodiment of the present application is similar to that of the CAN message data processing method provided in the embodiment of the present application, and therefore, the implementation of the CAN message data processing apparatus 200 provided in the embodiment of the present application may refer to the implementation of the CAN message data processing method provided in the embodiment of the present application, and repeated details are not repeated.
As shown in fig. 4, an electronic device 300 provided in the embodiment of the present application at least includes: the CAN message data processing method comprises a processor 301, a memory 302 and a computer program which is stored on the memory 302 and CAN run on the processor 301, wherein the CAN message data processing method provided by the embodiment of the application is realized when the processor 301 executes the computer program.
The electronic device 300 provided by the embodiment of the present application may further include a bus 303 connecting different components (including the processor 301 and the memory 302). Bus 303 represents one or more of any of several types of bus structures, including a memory bus, a peripheral bus, a local bus, and so forth.
The Memory 302 may include readable media in the form of volatile Memory, such as Random Access Memory (RAM) 3021 and/or cache Memory 3022, and may further include Read Only Memory (ROM) 3023.
The memory 302 may also include a program tool 3024 having a set (at least one) of program modules 3025, the program modules 3025 including, but not limited to: an operating subsystem, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.
It should be noted that the electronic device 300 shown in fig. 4 is only an example, and should not bring any limitation to the functions and the application scope of the embodiments of the present application.
The embodiment of the present application further provides a computer-readable storage medium, where a computer instruction is stored, and when the computer instruction is executed by a processor, the method for processing the CAN message data provided in the embodiment of the present application is implemented.
Further, while the operations of the methods of the present application are depicted in the drawings in a particular order, this does not require or imply that these operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present application.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (9)
1. A CAN message data processing method is applied to a multimedia car machine and is characterized by comprising the following steps:
acquiring CAN message data at the current moment, wherein the CAN message data is CAN message data sent by vehicle-mounted equipment;
performing mask filtering on CAN message data at the current moment by using a preset mask table to obtain effective data;
detecting whether the current time reaches preset data processing time of the vehicle-mounted equipment, and if so, acquiring current state information of the vehicle-mounted equipment from the effective data;
and judging whether the current state information of the vehicle-mounted equipment and the last state information change or not, if so, uploading the current state information of the vehicle-mounted equipment to a display screen, and otherwise, discarding the current state information of the vehicle-mounted equipment.
2. The CAN message data processing method according to claim 1, wherein the vehicle-mounted device comprises: the system comprises an instrument, a power unit controller, a vehicle body control unit, a battery management system, a wireless charging module, an atmosphere lamp module, a gateway, a radar module, an automatic parking system, an air conditioner and a panoramic all-around system.
3. The CAN message data processing method of claim 2, wherein the step of generating the preset mask table comprises:
and extracting the data bits of each vehicle-mounted device to be processed from the CAN message format of each vehicle-mounted device.
4. The CAN message data processing method according to claim 3, wherein mask filtering is performed on CAN message data at the current time by using a preset mask table to obtain valid data; the method comprises the following steps:
and AND-operating the CAN message data and the mask table at the current moment, and extracting the data with the operation result of 1 as effective data.
5. The CAN message data processing method of claim 1, wherein the data processing time of the vehicle-mounted device comprises: the method comprises the following steps of vehicle speed processing time, steering wheel corner processing time, engine rotating speed processing time, air conditioner temperature processing time, wheel speed pulse time, window switch progress time and charging and discharging current processing time.
6. The CAN message data processing method according to claim 5, wherein the detecting whether the current time reaches the preset data processing time of the vehicle-mounted device comprises:
setting a timer for data processing of each vehicle-mounted device;
and detecting whether the current time reaches the preset data processing time of the vehicle-mounted equipment or not by using the timer.
7. The utility model provides a CAN message data processing apparatus, is applied to multi-media car machine, its characterized in that includes:
the device comprises an acquisition unit, a processing unit and a processing unit, wherein the acquisition unit is used for acquiring CAN message data at the current moment, and the CAN message data is CAN message data sent by vehicle-mounted equipment;
the mask filtering unit is used for performing mask filtering on the CAN message data at the current moment by using a preset mask table to obtain effective data;
the timing processing unit is used for detecting whether the current time reaches the preset data processing time of the vehicle-mounted equipment, and if so, acquiring the current state information of the vehicle-mounted equipment from the valid data;
and the change detection unit is used for judging whether the current state information of the vehicle-mounted equipment and the last state information change or not, if so, uploading the current state information of the vehicle-mounted equipment to the display screen, and otherwise, discarding the current state information of the vehicle-mounted equipment.
8. An electronic device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the CAN message data processing method according to any one of claims 1-6 when executing the computer program.
9. A computer readable storage medium storing computer instructions which, when executed by a processor, implement CAN message data processing according to any one of claims 1-6.
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