CN114500149B - Baud rate self-adaptive adjustment method, device, equipment and storage medium - Google Patents
Baud rate self-adaptive adjustment method, device, equipment and storage medium Download PDFInfo
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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
- H04L12/4013—Management of data rate on the bus
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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 invention belongs to the technical field of automobile control, and discloses a baud rate self-adaptive adjustment method, a baud rate self-adaptive adjustment device, baud rate self-adaptive adjustment equipment and a storage medium. According to the method, a first acquisition result is obtained by CAN acquisition of a target vehicle according to a pre-stored first baud rate, whether baud rate adjustment is needed is judged according to the first acquisition result, if yes, the first baud rate is adjusted to a second baud rate, CAN acquisition is carried out on a target vehicle base based on the second baud rate, a second acquisition result is obtained, and a corresponding baud rate self-adaptive adjustment strategy is executed according to the second acquisition result until the adjusted baud rate is successfully matched. Compared with the prior art that the baud rate needs to be manually adjusted, the method and the device have the advantages that the CAN acquisition is carried out on the vehicle according to different baud rates, and the baud rate adjustment is carried out according to the acquisition result and the baud rate self-adaptive adjustment strategy, so that the baud rate adjustment efficiency is effectively improved, and the baud rate adjustment cost is reduced.
Description
Technical Field
The present invention relates to the field of automobile control technologies, and in particular, to a method, an apparatus, a device, and a storage medium for adaptive baud rate adjustment.
Background
With the development of society and technology, automobile development is more advanced, and automobiles bring a lot of convenience to people, and automobiles gradually become indispensable transportation means for people to travel, so that the demands of more and more people on automobiles are increased, and the markets of automobiles are also growing. The baud rate is an important parameter in the automobile communication module, and the automobile communication network section connected with the automobile communication module has and can only have one baud rate, so that when the automobile communication module is damaged and the automobile communication module needs to be replaced, the baud rate of the automobile communication module to be replaced needs to be adjusted to the same baud rate matched with the automobile, the baud rate is adjusted manually, the baud rate adjusting efficiency is low, the adjusting time is overlong, and the labor and management cost are wasted.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide a baud rate self-adaptive adjustment method, a baud rate self-adaptive adjustment device, baud rate self-adaptive adjustment equipment and a storage medium, and aims to solve the technical problem that the debugging efficiency is low due to manual baud rate debugging in the prior art.
In order to achieve the above object, the present invention provides a baud rate adaptive adjustment method, which includes the following steps:
CAN acquisition is carried out on the target vehicle according to a pre-stored first baud rate, and a first acquisition result is obtained;
judging whether the baud rate adjustment is needed according to the first acquisition result;
if yes, the first baud rate is adjusted to a second baud rate, CAN acquisition is carried out on the target vehicle base based on the second baud rate, and a second acquisition result is obtained;
and executing a corresponding baud rate self-adaptive adjustment strategy according to the second acquisition result until the adjusted baud rate is successfully matched.
Optionally, the determining whether the baud rate adjustment is needed according to the first acquisition result includes:
judging whether CAN messages corresponding to the first baud rate are acquired within a preset time length according to the first acquisition result;
if the CAN message corresponding to the first baud rate is not acquired within the preset time, judging that the baud rate adjustment is needed;
if the CAN message corresponding to the first baud rate is acquired within the preset time length, the baud rate adjustment is judged not to be needed.
Optionally, after the determining, according to the first acquisition result, whether the CAN packet corresponding to the first baud rate is acquired within a preset duration, the method further includes:
If the CAN message corresponding to the first baud rate is acquired within the preset time length, judging whether the number of the CAN message frames corresponding to the first baud rate exceeds a preset frame number threshold;
if the number of CAN message frames corresponding to the first baud rate does not exceed the preset frame number threshold, judging that baud rate adjustment is needed;
and if the number of CAN message frames corresponding to the first baud rate exceeds the preset frame number threshold, judging that baud rate adjustment is not needed.
Optionally, executing a corresponding baud rate adaptive adjustment policy according to the second acquisition result until the adjusted baud rate is successfully matched, including:
judging whether CAN messages corresponding to the second baud rate are acquired within the preset time length according to the second acquisition result;
and if the CAN message corresponding to the second baud rate is not acquired within the preset time, executing a corresponding baud rate self-adaptive adjustment strategy until the adjusted baud rate is successfully matched.
Optionally, after the determining, according to the second acquisition result, whether the CAN packet corresponding to the second baud rate is acquired within the preset duration, the method further includes:
if the CAN message corresponding to the second baud rate is acquired within the preset time length, judging whether the number of the CAN message frames corresponding to the second baud rate exceeds a preset frame number threshold;
And if the number of CAN message frames corresponding to the second baud rate does not exceed the preset frame number threshold, executing a corresponding baud rate self-adaptive adjustment strategy until the adjusted baud rates are successfully matched.
Optionally, if the number of CAN packets corresponding to the second baud rate does not exceed the preset number of frames threshold, executing a corresponding baud rate adaptive adjustment policy until the adjusted baud rate is successfully matched, including:
if the number of CAN message frames corresponding to the second baud rate does not exceed a preset frame number threshold, recovering the second baud rate to the initial baud rate;
and executing a corresponding baud rate self-adaptive adjustment strategy based on the initial baud rate until the adjusted baud rate is successfully matched.
Optionally, the executing a corresponding baud rate adaptive adjustment policy based on the initial baud rate until the adjusted baud rate is successfully matched includes:
generating CAN fault information, and sending the CAN fault information to a fault platform so that the fault platform generates a baud rate self-adaptive adjustment strategy according to the CAN fault information;
and receiving the baud rate self-adaptive adjustment strategy sent by the fault platform, and executing the corresponding baud rate self-adaptive adjustment strategy based on the initial baud rate until the adjusted baud rate is successfully matched.
In addition, in order to achieve the above object, the present invention also proposes a baud rate adaptive adjustment device, including:
the acquisition module is used for carrying out CAN acquisition on the target vehicle according to a pre-stored first baud rate to obtain a first acquisition result;
the adjusting module is used for judging whether the baud rate adjustment is needed according to the first acquisition result;
the acquisition module is further used for adjusting the first baud rate to a second baud rate if yes, and carrying out CAN acquisition on the target vehicle base based on the second baud rate to obtain a second acquisition result;
and the adjusting module is also used for executing a corresponding baud rate self-adaptive adjusting strategy according to the second acquisition result until the adjusted baud rate is successfully matched.
In addition, to achieve the above object, the present invention also proposes a baud rate adaptive adjustment apparatus, including: a memory, a processor, and a baud rate adaptation program stored on the memory and executable on the processor, the baud rate adaptation program configured to implement the steps of the baud rate adaptation method as described above.
In addition, in order to achieve the above object, the present invention also proposes a storage medium having stored thereon a baud rate adaptive adjustment program which, when executed by a processor, implements the steps of the baud rate adaptive adjustment method as described above.
According to the method, a first acquisition result is obtained by CAN acquisition of a target vehicle according to a pre-stored first baud rate, whether baud rate adjustment is needed is judged according to the first acquisition result, if yes, the first baud rate is adjusted to a second baud rate, CAN acquisition is carried out on the target vehicle base based on the second baud rate, a second acquisition result is obtained, and a corresponding baud rate self-adaptive adjustment strategy is executed according to the second acquisition result until the adjusted baud rates are successfully matched. According to the invention, the CAN acquisition is carried out on the vehicle according to different baud rates, and the baud rate adjustment is carried out according to the acquisition result and the baud rate self-adaptive adjustment strategy, so that the baud rate adjustment efficiency is effectively improved, and the baud rate adjustment cost is reduced.
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FIG. 1 is a schematic diagram of a baud rate adaptive adjustment device in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart of a baud rate adaptive adjustment method according to a first embodiment of the present invention;
FIG. 3 is a flowchart of a second embodiment of the baud rate adaptive adjustment method according to the present invention;
FIG. 4 is a flowchart of a baud rate adaptive adjustment method according to a third embodiment of the present invention;
fig. 5 is a block diagram of a first embodiment of the baud rate adaptive adjustment device according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a baud rate adaptive adjustment device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the baud rate adaptive adjustment device may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a high-speed random access Memory (Random Access Memory, RAM) or a stable nonvolatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the structure shown in fig. 1 does not constitute a limitation of the baud rate adaptive adjustment device, and may include more or fewer components than shown, or may combine certain components, or may be arranged in a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and a baud rate adaptive adjustment program may be included in the memory 1005 as one type of storage medium.
In the baud rate adaptive adjustment device shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the baud rate adaptive adjustment device of the present invention may be provided in the baud rate adaptive adjustment device, where the baud rate adaptive adjustment device invokes the baud rate adaptive adjustment program stored in the memory 1005 through the processor 1001, and executes the baud rate adaptive adjustment method provided by the embodiment of the present invention.
An embodiment of the present invention provides a baud rate adaptive adjustment method, and referring to fig. 2, fig. 2 is a flow chart of a first embodiment of the baud rate adaptive adjustment method of the present invention.
In this embodiment, the baud rate adaptive adjustment method includes the following steps:
step S10: and carrying out CAN acquisition on the target vehicle according to the pre-stored first baud rate to obtain a first acquisition result.
It should be understood that the execution body of the method of the present embodiment may be a baud rate adaptive adjustment device having functions of data processing, network communication and program running, such as an automobile communication controller, or other devices or apparatuses capable of implementing the same or similar functions, which will be hereinafter collectively referred to as a baud rate adaptive adjustment device.
The first baud rate may be a baud rate commonly used in a control area network (Controller Area Network, CAN) of the target vehicle, for example, 250Kbps or 500 Kbps. The controller area network is one of the vehicle-mounted field buses which are widely applied internationally, and is an ISO internationally standardized serial communication protocol.
The baud rate, which is a measure of the symbol transmission rate, is expressed in terms of the number of carrier modulation state changes per unit time, i.e., the number of symbols transmitted per unit time. The common baud rate of the vehicle-mounted CAN bus CAN be 250Kbps common to commercial vehicles and 500Kbps common to passenger vehicles, one and only one baud rate CAN exist in the same CAN communication network section, but a plurality of network sections CAN exist in the same trolley, so that a plurality of baud rates CAN exist, and the baud rates CAN be different for different vehicle types.
The first acquisition result may be an acquisition result after the baud rate self-adaptive adjustment device acquires any first baud rate message information on the CAN bus of the target vehicle according to the first baud rate. Because any message is collected, the message information meeting the J1938 protocol message format can be collected, and the collection efficiency is improved.
It should be understood that, in order to improve the acquisition efficiency, the message acquisition needs to be performed on the CAN bus of the target vehicle according to the preset first baud rate, so as to acquire the CAN message information of the target vehicle, which arbitrarily satisfies the J1938 protocol message format and corresponds to the first baud rate, so as to obtain the first acquisition result.
In a specific implementation, the baud rate self-adaptive adjustment device acquires the CAN message information of the corresponding first baud rate meeting the J1938 protocol message format on the CAN bus of the target vehicle based on the pre-stored first baud rate, and obtains a first acquisition result.
For example, the first baud rate pre-stored on the baud rate self-adaptive adjustment device is 250Kbps, and the baud rate self-adaptive adjustment device acquires the CAN message information meeting the corresponding 250Kbps baud rate of the J1938 protocol message format on the CAN bus of the target vehicle based on the pre-stored 250Kbps baud rate, so as to obtain a first acquisition result.
Step S20: and judging whether the baud rate adjustment is needed according to the first acquisition result.
It should be noted that, the first acquisition result may be that the CAN message information corresponding to the first baud rate is not acquired in the preset time, or the CAN message information corresponding to the first baud rate is acquired in the preset time, which is not limited by this embodiment.
It should be understood that, in order to accurately match the baud rate of the target vehicle, it is required to determine whether the CAN message information of the first baud rate pair exceeding the preset frame number threshold is acquired within a preset time according to the first acquisition result, and then determine whether the baud rate adjustment is required. And if the CAN message corresponding to the first baud rate is not acquired or the number of the acquired CAN message frames corresponding to the first baud rate does not meet the preset frame number condition, CAN acquisition is required according to the second baud rate.
Step S30: if yes, the first baud rate is adjusted to a second baud rate, CAN acquisition is carried out on the target vehicle base based on the second baud rate, and a second acquisition result is obtained.
It should be noted that the second baud rate may be a baud rate commonly used on a control local area network of the target vehicle, for example, 250Kbps or 500Kbps. The second baud rate corresponds to the first baud rate, e.g., the first baud rate is 250Kbps and the second baud rate is 500Kbps.
The second acquisition result may be an acquisition result after the baud rate self-adaptive adjustment device acquires any second baud rate message information on the CAN bus of the target vehicle according to the second baud rate. Because any message is collected, the message information meeting the J1938 protocol message format can be collected, and the collection efficiency is improved.
It should be understood that, in order to improve the acquisition efficiency, the message acquisition needs to be performed on the CAN bus of the target vehicle according to the preset second baud rate, so as to acquire the CAN message information of the target vehicle, which arbitrarily satisfies the J1938 protocol message format and corresponds to the second baud rate, so as to obtain the second acquisition result.
In a specific implementation, if the CAN message of the target vehicle acquired by the baud rate self-adaptive adjustment device based on the first baud rate does not meet a preset condition, the first baud rate is adjusted to a second baud rate, and CAN message information of the corresponding second baud rate meeting a J1938 protocol message format on a CAN bus of the target vehicle is acquired based on the second baud rate, so that a second acquisition result is obtained.
For example, the first baud rate is 250Kbps and the second baud rate is 500Kbps pre-stored on the baud rate adaptive adjustment device, the baud rate adaptive adjustment device does not meet a preset condition based on the CAN message of the target vehicle acquired by the baud rate adaptive adjustment device at 250Kbps, needs to adjust the baud rate from 250Kbps to 500Kbps, and acquires the CAN message information of the target vehicle at 500Kbps, which meets the 500Kbps baud rate of the J1938 protocol message format, on the CAN bus of the target vehicle, so as to obtain a second acquisition result.
Step S40: and executing a corresponding baud rate self-adaptive adjustment strategy according to the second acquisition result until the adjusted baud rate is successfully matched.
It should be noted that, the baud rate adaptive adjustment policy may be an adjustment policy for calibrating the baud rate of the corresponding vehicle type information according to the vehicle type information of the target vehicle.
The second acquisition result may be that the CAN message information corresponding to the second baud rate is not acquired in a preset time, or the CAN message information corresponding to the second baud rate is acquired in a preset time and does not exceed a preset frame number threshold, or the CAN message information corresponding to the second baud rate exceeding the preset frame number threshold is acquired in a preset time, which is not limited in this embodiment.
It should be understood that, in order to accurately match the baud rate of the target vehicle, it is required to determine whether the CAN message information of the second baud rate pair exceeding the preset frame number threshold is acquired within a preset time according to the second acquisition result, and then determine whether the baud rate adjustment is required. If the CAN message corresponding to the second baud rate is not acquired or the number of the CAN message frames corresponding to the acquired second baud rate does not meet the preset frame number condition, an adjustment strategy of the baud rate of the corresponding vehicle type information is required to be calibrated according to the vehicle type information of the target vehicle.
In specific implementation, the baud rate self-adaptive adjustment device determines whether the baud rate of the target vehicle is matched with the second baud rate according to the second acquisition result, if not, the baud rate is adjusted according to an adjustment strategy of the baud rate of the corresponding vehicle type information calibrated according to the vehicle type information of the target vehicle until the adjusted baud rate is successfully matched with the target vehicle.
It should be understood that, in order to reduce the possibility of erroneous determination of the baud rate, the baud rate adaptive adjustment device may switch the baud rate to the first baud rate again after the acquisition of the CAN message corresponding to the second baud rate on the target vehicle based on the second baud rate fails, and acquire the CAN message corresponding to the first baud rate again. If the CAN message collection corresponding to the first baud rate fails, the first baud rate is switched to the second baud rate, the CAN message collection corresponding to the first baud rate is carried out again, the steps are repeated for a plurality of times until the preset times are exceeded, and if the continuous matching fails, the corresponding baud rate self-adaptive adjustment strategy is executed until the adjusted baud rate is successfully matched.
In a specific implementation, for example, the first baud rate is 250Kbps, the second baud rate is 500Kbps, the baud rate adaptive adjustment device switches the baud rate to 250Kbps baud rate after performing a CAN message acquisition failure corresponding to 500Kbps baud rate on the target vehicle based on 500Kbps baud rate, and performs a CAN message acquisition corresponding to 250Kbps baud rate again, if the CAN message acquisition failure corresponding to 250Kbps baud rate, switches the baud rate to 500Kbp, and repeats the process for 6 times, if the CAN message acquisition failure corresponding to 250Kbps baud rate still fails to be normally matched after exceeding 6 times, stops the baud rate switching, and executes a corresponding baud rate adaptive adjustment strategy until the adjusted baud rate is successfully matched.
Further, in order to improve the accuracy of the message collection and avoid the situation of erroneous judgment due to delay, the step S40 includes:
step S401: judging whether CAN messages corresponding to the second baud rate are acquired within the preset time length according to the second acquisition result;
step S402: and if the CAN message corresponding to the second baud rate is not acquired within the preset time, executing a corresponding baud rate self-adaptive adjustment strategy until the adjusted baud rate is successfully matched.
It should be noted that, the second acquisition result may be that the CAN message information corresponding to the second baud rate is not acquired in the preset time, or the CAN message information corresponding to the second baud rate is not acquired in the preset time, or the CAN message information corresponding to the second baud rate is acquired in the preset time.
It should be understood that, since there may be a mechanism for sending a message in a delayed manner by the controller on the vehicle after the target vehicle is powered on, in order to consider the delay mechanism for sending the message, a preset duration needs to be set, and the CAN message corresponding to the second baud rate is acquired based on the preset duration.
Further, in order to avoid erroneous judgment caused by too small number of frames of the message collection, the step S401 further includes:
step S4011: if the CAN message corresponding to the second baud rate is acquired within the preset time length, judging whether the number of the CAN message frames corresponding to the second baud rate exceeds a preset frame number threshold;
step S4012: and if the number of CAN message frames corresponding to the second baud rate does not exceed the preset frame number threshold, executing a corresponding baud rate self-adaptive adjustment strategy until the adjusted baud rates are successfully matched.
It should be noted that, the number of message frames may be the number of CAN message frames corresponding to the second baud rate acquired in the preset duration. The preset frame number threshold value CAN be a frame number condition which needs to be met by presetting the frame number of the CAN message, and the frame number of the message CAN be 3 frames, 5 frames, 10 frames or the like, and CAN also be other frame numbers.
It should be understood that, in order to ensure that the acquired messages have enough numbers, avoid the situation that the acquisition is insufficient due to the insufficient numbers, reduce the misjudgment of matching, preset frame number threshold is needed, and whether the baud rate needs to be adjusted is determined by judging whether the frame number of the CAN message corresponding to the acquired second baud rate exceeds the preset frame number threshold, so that the accuracy of the baud rate adjustment is improved.
Further, the step S4012 of avoiding the baud rate matching error, which leads to the communication failure of the vehicle, includes:
if the number of CAN message frames corresponding to the second baud rate does not exceed a preset frame number threshold, recovering the second baud rate to the initial baud rate;
and executing a corresponding baud rate self-adaptive adjustment strategy based on the initial baud rate until the adjusted baud rate is successfully matched.
It should be noted that, the initial baud rate may be a default mode rate pre-stored by the baud rate adaptive adjustment device, and the initial baud rate may be 250Kbps or 500Kbps, or may be other baud rates.
It should be appreciated that in order to avoid a baud rate matching error, which leads to a vehicle communication failure, the baud rate adaptive adjustment device needs to restore the current baud rate to the pre-stored initial baud rate.
In a specific implementation, for example, the initial baud rate is 250Kbps, the second baud rate is 500Kbps, the preset frame number threshold is 3 frames, the number of the CAN packets corresponding to the 500Kbps baud rate acquired by the baud rate adaptive adjustment device is 2 frames, if the number of the CAN packets does not exceed the preset frame number threshold, the 500Kbps baud rate is restored to the 250Kbps baud rate.
Further, executing the corresponding baud rate adaptive adjustment strategy based on the initial baud rate until the adjusted baud rate is successfully matched, including:
Generating CAN fault information, and sending the CAN fault information to a fault platform so that the fault platform generates a baud rate self-adaptive adjustment strategy according to the CAN fault information;
and receiving the baud rate self-adaptive adjustment strategy sent by the fault platform, and executing the corresponding baud rate self-adaptive adjustment strategy based on the initial baud rate until the adjusted baud rate is successfully matched.
The CAN fault information may be information that the baud rate adaptive adjustment device fails to collect the CAN message for the target vehicle according to the first baud rate and the second baud rate. The CAN fault information may be CAN messages that do not collect meeting conditions based on the first baud rate and the second baud rate.
The fault platform can be a platform storing a vehicle model, a baud rate self-adaptive adjustment strategy and a relation mapping table between the vehicle model and the baud rate self-adaptive adjustment strategy, and can be a local server platform or a cloud server platform.
It should be understood that the baud rate self-adaptive adjustment device performs data transmission communication with the fault platform through the built-in mobile communication module, generates corresponding CAN fault information based on the failure of the matching between the first baud rate and the second baud rate, sends the corresponding CAN fault information to the fault platform through the mobile communication module, and uploads the model of the target vehicle and the current initial baud rate. After receiving fault information fed back by the baud rate self-adaptive adjustment device, the fault platform determines a baud rate self-adaptive adjustment strategy corresponding to the target vehicle according to a relation mapping table between the vehicle model and the baud rate self-adaptive adjustment strategy, and sends the baud rate self-adaptive adjustment strategy to the baud rate self-adaptive adjustment device. The baud rate self-adaptive adjusting device adjusts the baud rate according to the baud rate self-adaptive adjusting strategy until the adjusted baud rate is successfully matched with the target vehicle.
According to the embodiment, a first acquisition result is obtained by CAN acquisition of a target vehicle according to a pre-stored first baud rate, whether baud rate adjustment is needed is judged according to the first acquisition result, if yes, the first baud rate is adjusted to a second baud rate, CAN acquisition is carried out on the target vehicle base based on the second baud rate, a second acquisition result is obtained, and a corresponding baud rate self-adaptive adjustment strategy is executed according to the second acquisition result until the adjusted baud rates are successfully matched. According to the invention, the CAN acquisition is carried out on the vehicle according to different baud rates, and the baud rate adjustment is carried out according to the acquisition result and the baud rate self-adaptive adjustment strategy, so that the baud rate adjustment efficiency is effectively improved, and the baud rate adjustment cost is reduced.
Referring to fig. 3, fig. 3 is a flowchart illustrating a second embodiment of a baud rate adaptive adjustment method according to the present invention.
Based on the first embodiment, in this embodiment, the step S20 includes:
step S201: judging whether the CAN message corresponding to the first baud rate is acquired within a preset time length according to the first acquisition result.
It should be noted that the preset duration may be a message period for collecting the CAN message, and the preset duration may be a duration of 10ms, 20ms, 50ms, 100ms, 500ms, 1s, or 2s, etc., where the preset duration may be a maximum control duration, for example, a duration of 3s, 4s, or 5s, etc. The CAN message corresponding to the first baud rate CAN be CAN message information corresponding to the first baud rate, meeting the J1938 protocol message format, on the CAN bus of the target vehicle based on the pre-stored first baud rate.
It should be understood that, since there may be a mechanism for sending a message in a delayed manner by the controller on the vehicle after the target vehicle is powered on, in order to consider the delay mechanism for sending the message, a preset duration needs to be set, and the CAN message corresponding to the first baud rate is acquired based on the preset duration.
Step S202: if the CAN message corresponding to the first baud rate is not acquired within the preset time, judging that the baud rate adjustment is needed.
In a specific implementation, if the baud rate adaptive adjustment device does not acquire the CAN message information meeting the first baud rate corresponding to the J1938 protocol message format on the CAN bus of the target vehicle in the message period of acquiring the CAN message, it is determined that the first baud rate pre-stored by the baud rate adaptive adjustment device is not matched with the baud rate of the CAN bus of the target vehicle, so that the baud rate adjustment is required.
For example, if the preset duration is 3s and the first baud rate is 250Kbps, and if the baud rate adaptive adjustment device does not acquire the CAN message information meeting the baud rate of 250Kbps corresponding to the J1938 protocol message format on the CAN bus of the target vehicle within 3s, it is determined that the baud rate of 250Kbps pre-stored by the baud rate adaptive adjustment device is not matched with the baud rate of the CAN bus of the target vehicle, so that baud rate adjustment is required.
Step S203: if the CAN message corresponding to the first baud rate is acquired within the preset time length, the baud rate adjustment is judged not to be needed.
In a specific implementation, if the baud rate adaptive adjustment device collects the CAN message information meeting the first baud rate corresponding to the J1938 protocol message format on the CAN bus of the target vehicle in the message period of collecting the CAN message, it is determined that the first baud rate pre-stored by the baud rate adaptive adjustment device is matched with the baud rate of the CAN bus of the target vehicle, so that the baud rate adjustment is not required.
For example, the preset duration is 50ms, the first baud rate is 500Kbps, if the baud rate adaptive adjustment device collects the CAN message information meeting the 500Kbps baud rate corresponding to the J1938 protocol message format on the CAN bus of the target vehicle within 50ms, it is determined that the 500Kbps baud rate pre-stored by the baud rate adaptive adjustment device is matched with the baud rate of the CAN bus of the target vehicle, so that the baud rate adjustment is not needed.
According to the embodiment, whether the CAN message corresponding to the first baud rate is acquired within the preset time period is judged according to the first acquisition result, if the CAN message corresponding to the first baud rate is not acquired within the preset time period, the baud rate adjustment is judged to be needed, and if the CAN message corresponding to the first baud rate is acquired within the preset time period, the baud rate adjustment is judged not to be needed. The invention determines whether the baud rate adjustment is needed based on judging whether the CAN message corresponding to the first baud rate is acquired within the preset time length, fully considers the stability and the real-time effect of the CAN system of the target vehicle, ensures the accuracy of CAN message acquisition, effectively avoids the condition that the vehicle controller or the system cannot acquire due to time delay, and improves the message acquisition efficiency.
Referring to fig. 4, fig. 4 is a flowchart of a third embodiment of a baud rate adaptive adjustment method according to the present invention.
Based on the above second embodiment, in this embodiment, the step S201 includes:
step S2021: if the CAN message corresponding to the first baud rate is acquired within the preset time length, judging whether the number of the CAN message frames corresponding to the first baud rate exceeds a preset frame number threshold.
It should be noted that, the number of message frames may be the number of CAN message frames corresponding to the first baud rate acquired in the preset duration. The preset frame number threshold value CAN be a frame number condition which needs to be met by presetting the frame number of the CAN message, and the frame number of the message CAN be 3 frames, 5 frames, 10 frames or the like, and CAN also be other frame numbers.
It should be understood that, in order to ensure that the acquired messages have enough numbers, avoid the situation that the acquisition is insufficient due to the insufficient numbers, reduce the misjudgment of matching, preset frame number threshold is needed, and whether the baud rate needs to be adjusted is determined by judging whether the frame number of the CAN message corresponding to the acquired first baud rate exceeds the preset frame number threshold, so that the accuracy of the baud rate adjustment is improved.
Step S2022: and if the number of CAN message frames corresponding to the first baud rate does not exceed the preset frame number threshold, judging that baud rate adjustment is needed.
In a specific implementation, if the baud rate adaptive adjustment device collects the CAN bus of the target vehicle in the message period of collecting the CAN message, and the number of CAN message frames corresponding to the first baud rate in the J1938 protocol message format does not exceed the preset message frame number threshold, it is determined that the first baud rate pre-stored by the baud rate adaptive adjustment device is not matched with the baud rate of the CAN bus of the target vehicle, so that baud rate adjustment is needed.
For example, the preset duration is 3s, the preset frame number threshold is 3 frames, the first baud rate is 250Kbps, if the baud rate adaptive adjustment device collects that the number of the CAN message frames meeting the 250Kbps baud rate corresponding to the J1938 protocol message format on the CAN bus of the target vehicle in 3s does not exceed 3 frames, it is determined that the 250Kbps baud rate pre-stored by the baud rate adaptive adjustment device is not matched with the baud rate of the CAN bus of the target vehicle, and therefore baud rate adjustment is needed.
Step S2023: and if the number of CAN message frames corresponding to the first baud rate exceeds the preset frame number threshold, judging that baud rate adjustment is not needed.
In a specific implementation, if the baud rate adaptive adjustment device collects the CAN message frame number meeting the first baud rate corresponding to the J1938 protocol message format on the CAN bus of the target vehicle within the message period of collecting the CAN message, and exceeds a preset message frame number threshold, it is determined that the first baud rate pre-stored by the baud rate adaptive adjustment device is matched with the baud rate of the CAN bus of the target vehicle, so that the baud rate adjustment is not needed.
For example, the preset duration is 1s, the preset frame number threshold is 10 frames, the first baud rate is 500Kbps, if the baud rate adaptive adjustment device collects that the number of frames of the CAN message meeting the 500Kbps baud rate corresponding to the J1938 protocol message format on the CAN bus of the target vehicle exceeds 10 frames within 1s, it is determined that the 500Kbps baud rate pre-stored by the baud rate adaptive adjustment device is matched with the baud rate of the CAN bus of the target vehicle, so that baud rate adjustment is not needed.
In this embodiment, if the CAN packet corresponding to the first baud rate is collected within a preset period of time, it is determined whether the number of frames of the CAN packet corresponding to the first baud rate exceeds a preset frame number threshold, if the number of frames of the CAN packet corresponding to the first baud rate does not exceed the preset frame number threshold, it is determined that the baud rate needs to be adjusted, and if the number of frames of the CAN packet corresponding to the first baud rate exceeds the preset frame number threshold, it is determined that the baud rate does not need to be adjusted. According to the method, whether the baud rate adjustment is needed or not is determined by judging whether the number of CAN message frames corresponding to the acquired first baud rate exceeds the preset frame number threshold, so that the error of CAN message acquisition is effectively reduced, erroneous judgment on the baud rate adjustment caused by insufficient number of the acquired message frames is avoided, the accuracy of baud rate matching with a target vehicle is ensured, and the baud rate adjustment efficiency is improved.
In addition, the embodiment of the invention also provides a storage medium, wherein the storage medium is stored with a baud rate self-adaptive adjustment program, and the baud rate self-adaptive adjustment program realizes the steps of the baud rate self-adaptive adjustment method when being executed by a processor.
Because the storage medium adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are not described in detail herein.
Referring to fig. 5, fig. 5 is a block diagram of a first embodiment of the baud rate adaptive adjustment device according to the present invention.
As shown in fig. 5, the baud rate adaptive adjustment device according to the embodiment of the present invention includes:
the acquisition module 10 is used for carrying out CAN acquisition on the target vehicle according to a pre-stored first baud rate to obtain a first acquisition result;
the adjusting module 20 is configured to determine whether baud rate adjustment is needed according to the first acquisition result;
the acquisition module 10 is further configured to adjust the first baud rate to a second baud rate if yes, and perform CAN acquisition on the target vehicle base based on the second baud rate to obtain a second acquisition result;
and the adjusting module 20 is further configured to execute a corresponding baud rate adaptive adjustment policy according to the second acquisition result until the adjusted baud rate is successfully matched.
Further, the adjusting module 20 is further configured to determine, according to the first acquisition result, whether a CAN packet corresponding to the first baud rate is acquired within a preset duration, if the CAN packet corresponding to the first baud rate is not acquired within the preset duration, determine that the baud rate adjustment is required, and if the CAN packet corresponding to the first baud rate is acquired within the preset duration, determine that the baud rate adjustment is not required.
Further, the adjusting module 20 is further configured to determine whether the number of CAN packets corresponding to the first baud rate exceeds a preset frame number threshold if the CAN packets corresponding to the first baud rate are collected within a preset period of time, determine that the baud rate adjustment is required if the number of CAN packets corresponding to the first baud rate does not exceed the preset frame number threshold, and determine that the baud rate adjustment is not required if the number of CAN packets corresponding to the first baud rate exceeds the preset frame number threshold.
Further, the adjusting module 20 is further configured to determine, according to the second acquisition result, whether a CAN packet corresponding to the second baud rate is acquired within the preset duration, and if the CAN packet corresponding to the second baud rate is not acquired within the preset duration, execute a corresponding baud rate adaptive adjustment policy until the adjusted baud rates are successfully matched.
Further, the adjusting module 20 is further configured to determine whether the number of CAN packets corresponding to the second baud rate exceeds a preset frame number threshold if the CAN packets corresponding to the second baud rate are collected within the preset period, and execute a corresponding baud rate adaptive adjustment policy if the number of CAN packets corresponding to the second baud rate does not exceed the preset frame number threshold until the adjusted baud rate is successfully matched.
Further, the adjusting module 20 is further configured to restore the second baud rate to an initial baud rate if the number of CAN packets corresponding to the second baud rate does not exceed a preset frame number threshold, and execute a corresponding baud rate adaptive adjustment policy based on the initial baud rate until the adjusted baud rates are successfully matched.
Further, the adjusting module 20 is further configured to generate CAN fault information, send the CAN fault information to a fault platform, so that the fault platform generates a baud rate adaptive adjustment policy according to the CAN fault information, receive the baud rate adaptive adjustment policy sent by the fault platform, and execute the corresponding baud rate adaptive adjustment policy based on the initial baud rate until the adjusted baud rate is successfully matched.
According to the embodiment, a first acquisition result is obtained by CAN acquisition of a target vehicle according to a pre-stored first baud rate, whether baud rate adjustment is needed is judged according to the first acquisition result, if yes, the first baud rate is adjusted to a second baud rate, CAN acquisition is carried out on the target vehicle base based on the second baud rate, a second acquisition result is obtained, and a corresponding baud rate self-adaptive adjustment strategy is executed according to the second acquisition result until the adjusted baud rates are successfully matched. According to the invention, the CAN acquisition is carried out on the vehicle according to different baud rates, and the baud rate adjustment is carried out according to the acquisition result and the baud rate self-adaptive adjustment strategy, so that the baud rate adjustment efficiency is effectively improved, and the baud rate adjustment cost is reduced.
It should be understood that the foregoing is illustrative only and is not limiting, and that in specific applications, those skilled in the art may set the invention as desired, and the invention is not limited thereto.
It should be noted that the above-described working procedure is merely illustrative, and does not limit the scope of the present invention, and in practical application, a person skilled in the art may select part or all of them according to actual needs to achieve the purpose of the embodiment, which is not limited herein.
In addition, technical details not described in detail in this embodiment may refer to the baud rate adaptive adjustment method provided in any embodiment of the present invention, which is not described herein.
Furthermore, it should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. Read Only Memory)/RAM, magnetic disk, optical disk) and including several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (4)
1. The adaptive baud rate adjusting method is characterized by comprising the following steps of:
CAN acquisition is carried out on the target vehicle according to a pre-stored first baud rate, and a first acquisition result is obtained;
judging whether CAN messages corresponding to the first baud rate are acquired within a preset time length according to the first acquisition result;
if the CAN message corresponding to the first baud rate is acquired within the preset time length, judging whether the number of the CAN message frames corresponding to the first baud rate exceeds a preset frame number threshold;
if the number of CAN message frames corresponding to the first baud rate does not exceed the preset frame number threshold, judging that baud rate adjustment is needed;
if the number of CAN message frames corresponding to the first baud rate exceeds the preset frame number threshold, judging that baud rate adjustment is not needed;
if the CAN message corresponding to the first baud rate is not acquired within the preset time, judging that the baud rate adjustment is needed;
If the CAN message corresponding to the first baud rate is acquired within the preset time length, judging that the baud rate adjustment is not needed;
if the baud rate is judged to be required to be adjusted, adjusting the first baud rate to a second baud rate, and carrying out CAN acquisition on the target vehicle base based on the second baud rate to obtain a second acquisition result;
judging whether CAN messages corresponding to the second baud rate are acquired within the preset time length according to the second acquisition result;
if the CAN message corresponding to the second baud rate is acquired within the preset time length, judging whether the number of the CAN message frames corresponding to the second baud rate exceeds a preset frame number threshold;
if the number of CAN message frames corresponding to the second baud rate does not exceed a preset frame number threshold, recovering the second baud rate to the initial baud rate;
generating CAN fault information, and sending the CAN fault information and the vehicle model of the target vehicle to a fault platform, so that the fault platform searches a relation mapping table according to the CAN fault information and the vehicle model, determines a baud rate self-adaptive adjustment strategy based on a search result, and stores the relation mapping table which is a mapping table storing a mapping relation between the vehicle model and the baud rate self-adaptive adjustment strategy;
Receiving the baud rate self-adaptive adjustment strategy sent by the fault platform, and executing the corresponding baud rate self-adaptive adjustment strategy based on the initial baud rate until the adjusted baud rate is successfully matched;
and if the CAN message corresponding to the second baud rate is not acquired within the preset time, executing a corresponding baud rate self-adaptive adjustment strategy until the adjusted baud rate is successfully matched.
2. A baud rate adaptive adjustment device, characterized in that the baud rate adaptive adjustment device comprises:
the acquisition module is used for carrying out CAN acquisition on the target vehicle according to a pre-stored first baud rate to obtain a first acquisition result;
the adjusting module is used for judging whether the CAN message corresponding to the first baud rate is acquired within a preset duration according to the first acquisition result; if the CAN message corresponding to the first baud rate is acquired within the preset time length, judging whether the number of the CAN message frames corresponding to the first baud rate exceeds a preset frame number threshold; if the number of CAN message frames corresponding to the first baud rate does not exceed the preset frame number threshold, judging that baud rate adjustment is needed; if the number of CAN message frames corresponding to the first baud rate exceeds the preset frame number threshold, judging that baud rate adjustment is not needed; if the CAN message corresponding to the first baud rate is not acquired within the preset time, judging that the baud rate adjustment is needed; if the CAN message corresponding to the first baud rate is acquired within the preset time length, judging that the baud rate adjustment is not needed;
The acquisition module is further configured to adjust the first baud rate to a second baud rate if it is determined that baud rate adjustment is required, and perform CAN acquisition on the target vehicle base based on the second baud rate to obtain a second acquisition result;
the adjusting module is further configured to determine whether a CAN packet corresponding to the second baud rate is collected within the preset duration according to the second collection result; if the CAN message corresponding to the second baud rate is acquired within the preset time length, judging whether the number of the CAN message frames corresponding to the second baud rate exceeds a preset frame number threshold; if the number of CAN message frames corresponding to the second baud rate does not exceed a preset frame number threshold, recovering the second baud rate to the initial baud rate; generating CAN fault information, and sending the CAN fault information and the vehicle model of the target vehicle to a fault platform, so that the fault platform searches a relation mapping table according to the CAN fault information and the vehicle model, determines a baud rate self-adaptive adjustment strategy based on a search result, and stores the relation mapping table which is a mapping table storing a mapping relation between the vehicle model and the baud rate self-adaptive adjustment strategy; receiving the baud rate self-adaptive adjustment strategy sent by the fault platform, and executing the corresponding baud rate self-adaptive adjustment strategy based on the initial baud rate until the adjusted baud rate is successfully matched; and if the CAN message corresponding to the second baud rate is not acquired within the preset time, executing a corresponding baud rate self-adaptive adjustment strategy until the adjusted baud rate is successfully matched.
3. A baud rate adaptive adjustment device, characterized in that the baud rate adaptive adjustment device comprises: a memory, a processor, and a baud rate adaptive adjustment program stored on the memory and executable on the processor, the baud rate adaptive adjustment program configured to implement the baud rate adaptive adjustment method of claim 1.
4. A storage medium having a baud rate adaptive adjustment program stored thereon, which when executed by a processor, implements the baud rate adaptive adjustment method of claim 1.
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| CN117376058A (en) * | 2023-12-07 | 2024-01-09 | 武汉神动汽车电子电器股份有限公司 | CAN bus baud rate self-adaption method |
| CN117640016B (en) * | 2024-01-26 | 2024-05-17 | 北京智芯微电子科技有限公司 | Baud rate negotiation method, device, computer equipment, chip and storage medium |
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