CN113595817A - LIN communication fault injection method, system and storage medium - Google Patents
LIN communication fault injection method, system and storage medium Download PDFInfo
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- CN113595817A CN113595817A CN202110811103.6A CN202110811103A CN113595817A CN 113595817 A CN113595817 A CN 113595817A CN 202110811103 A CN202110811103 A CN 202110811103A CN 113595817 A CN113595817 A CN 113595817A
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- 238000004891 communication Methods 0.000 title claims abstract description 108
- 238000002347 injection Methods 0.000 title claims abstract description 95
- 239000007924 injection Substances 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000012360 testing method Methods 0.000 abstract description 26
- 201000011059 lobular neoplasia Diseases 0.000 description 113
- 230000006870 function Effects 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000015607 signal release Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000012353 t test Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
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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
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
-
- 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
-
- 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
- H04L2012/40234—Local Interconnect Network LIN
Abstract
The invention discloses a LIN communication fault injection method, a system and a computer readable storage medium, wherein the method is applied to LIN communication fault injection equipment, and the method comprises the following steps: the LIN communication fault injection equipment stores a message in a first buffer area when receiving the message which is sent by an LIN host and takes a main node as a signal issuing node; modifying the message in the first buffer area according to a preset fault injection rule; and sending the modified message to the LIN slave. Compared with the prior art, the invention improves the accuracy of LIN communication fault test.
Description
Technical Field
The invention relates to the technical field of LIN communication fault testing, in particular to an LIN communication fault injection method, an LIN communication fault injection system and a storage medium.
Background
The serial communication network during LIN communication is used for realizing the control of a distributed electronic system in an automobile and providing an auxiliary function for the existing automobile network. The use of the LIN bus CAN result in significant cost savings where the bandwidth and versatility of the CAN bus are not required. In order to ensure that LIN communication information of a host computer and a slave computer of the automobile controller is accurate, verification is needed in the early stage of design. Verification based on the LIN communication function is done in the test phase. In the testing process, the possibility of traversing all signal combinations is needed, and because signal messages in an abnormal mode are difficult to trigger in a normal mode, the LIN signals can be actively changed manually according to requirements, so that the testing requirements are met.
The manual change of the physical state to change the message can only change some simple mechanical states, and for some faults which are difficult to reproduce or change, long-time preparation is needed, and even the change cannot be carried out: some states cannot be reproduced and then cannot be tested, so that some test functions cannot be covered; only some test cases which can be manually and mechanically interfered can be tested; in a normal working state in the test process, the risk of damaging the slave machine exists by adopting human mechanical interference; man-made mechanical interference exists, and the slave machine has the risk of harming testing personnel in the working state; the function that can't test can't guarantee the accuracy of relevant code, if this problem appears, there is unknown risk.
At present, equipment which is used as a host or a slave independently cannot be used for testing the host and the slave simultaneously, conventional communication needs to be tested separately, and the testing time is greatly prolonged. Because the integrity of the system is damaged in the test process, the test LIN equipment is difficult to completely simulate actual physical signals, so that the test coverage is insufficient, and the test is inaccurate.
Disclosure of Invention
The invention mainly aims to provide a LIN communication fault injection method, a LIN communication fault injection system and a storage medium, and aims to improve the accuracy of LIN communication fault testing.
In order to achieve the above object, the present invention provides a LIN communication fault injection method, which is applied to a LIN communication fault injection device, and includes the following steps:
the LIN communication fault injection equipment stores a message in a first buffer area when receiving the message which is sent by an LIN host and takes a main node as a signal issuing node;
modifying the message in the first buffer area according to a preset fault injection rule;
and sending the modified message to the LIN slave.
A further technical solution of the present invention is that, before the step of modifying the packet in the first buffer according to the preconfigured fault injection rule, the method further includes:
judging whether the message in the first buffer area needs to be modified or not;
if yes, executing the step of modifying the message in the first buffer area according to a preconfigured fault injection rule;
and if not, sending the message in the first buffer area to the LIN slave.
A further technical solution of the present invention is that, when receiving a packet sent by an LIN host and using a master node as a signal distribution node, the LIN communication fault injection device further includes, before the step of storing the packet in a first buffer area:
judging whether the LIN communication fault injection equipment receives a message sent by an LIN host computer and using a main node as a signal issuing node;
and if so, executing the step that the LIN communication fault injection equipment stores the message in the first buffer zone when receiving the message which is sent by the LIN host and takes the master node as the signal issuing node.
A further technical solution of the present invention is that, after the step of determining whether the LIN communication fault injection device receives a message sent by the LIN host, where the message is sent by the master node as a signal distribution node, the method further includes:
if not, sending a message frame header serving as a signal issuing node to the LIN slave machine at regular time;
storing the message replied by the LIN slave in a second buffer area;
modifying the message in the second buffer area according to a pre-configured fault injection rule when receiving a message frame header which is sent by the LIN host and takes the slave node as a signal issuing node;
and replying the modified message to the LIN host.
A further technical solution of the present invention is that the step of modifying the packet in the second buffer according to the preconfigured fault injection rule comprises:
judging whether the message in the second buffer area needs to be modified or not;
and if so, modifying the message in the second buffer area according to a preset fault injection rule.
A further technical solution of the present invention is that, after the step of determining whether the packet in the second buffer needs to be modified, the method further includes:
and if not, the message in the second buffer area is replied to the LIN host.
A further technical solution of the present invention is that the step of determining whether the packet in the second buffer needs to be modified includes:
judging whether a message frame header of a slave node sent by the LIN host is received and used as a signal issuing node;
if yes, executing the step of judging whether the message in the second buffer area needs to be modified.
If not, returning to the step of judging whether the LIN communication fault injection equipment receives the message which is sent by the LIN host and takes the master node as the signal issuing node.
The further technical scheme of the invention is that the method also comprises the following steps:
fault injection rules are pre-configured.
To achieve the above object, the present invention also proposes a LIN communication fault injection system, which includes a memory, a processor, and a LIN communication fault injection program stored on the processor, the LIN communication fault injection program being executed by the processor to perform the steps of the method as described above.
To achieve the above object, the present invention also proposes a computer-readable storage medium having stored thereon a LIN communication fault injection program, which, when executed by a processor, performs the steps of the method as described above.
The LIN communication fault injection method, the LIN communication fault injection system and the computer readable storage medium have the advantages that: according to the technical scheme, when the LIN communication fault injection equipment receives a message which is sent by an LIN host and takes a main node as a signal issuing node, the message is stored in a first buffer area; modifying the message in the first buffer area according to a preset fault injection rule; and the modified message is sent to the LIN slave, so that the accuracy of the LIN communication fault test is improved.
Drawings
Fig. 1 is a schematic design diagram of a LIN communication fault injection device;
fig. 2 is a schematic diagram of a LIN communication fault injection logic scheme;
FIG. 3 is a schematic diagram of a host computer interface;
FIG. 4 is another schematic diagram of a host computer interface;
fig. 5 is a flow chart schematic diagram of the LIN communication fault injection method of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 5, the present invention provides a LIN communication fault injection method, which is applied to a LIN communication fault injection device.
The invention constructs LIN communication fault injection equipment between a master machine and a slave machine, which is used for synchronously controlling the communication between the master machine and the slave machine and simulating the mutual communication between the master machine and the slave machine.
As shown in fig. 1, the design principle of the LIN communication fault injection device is as follows: and testing the host and the slave simultaneously, wherein when the host sends a message to the slave or the slave responds the message to the host, the message needs to pass through LIN fault testing equipment. The LIN communication fault injection equipment has the function of route forwarding, and changes corresponding bits according to the setting of the upper computer in the process of route forwarding, so that signal change and fault injection are realized.
As shown in fig. 2, the LIN communication fault injection device of the present invention uses a microcontroller as a core, and designs an LIN slave transceiver circuit to realize a simulated LIN slave communication function; designing an LIN host receiving and transmitting circuit to realize the communication function of the analog LIN host; designing a power supply circuit to ensure normal power-on work of the equipment; designing a CAN transceiver circuit, designing and debugging software of an upper computer and a lower computer through CAN communication, realizing the modification and transmission of communication messages by the upper computer,
as shown in fig. 3 and 4, after the back circuit is connected, the LIN communication fault injection device, the master and the slave are activated. The upper computer adopts a CAN communication mode to realize the LIN communication fault injection setting, sets the ID, the message type, the message period, the data target value and the mask data value of LIN through parameters, and CAN realize the modification of the LIN communication message after the state is updated.
As shown in fig. 5, the technical solution adopted in the preferred embodiment of the LIN communication fault injection method of the present invention is mainly that when the device receives a message sent by the host as a signal distribution node, the message is stored in a buffer, and when the LIN that the device sends data to the slave is idle, the message is sent to the slave after changing the corresponding bit according to the fault injection rule set by the host. The equipment regularly sends a message frame header which is taken as a signal release node to the slave according to the setting of the upper computer, the signal replied by the slave is stored in a cache region, and when the host sends the message frame header which is taken as the signal release node to the equipment, the equipment changes the data in the corresponding cache region according to the fault injection rule set by the upper computer and then feeds back the data to the host.
Specifically, the preferred embodiment of the LIN communication fault injection method of the present invention comprises the following steps:
step S10, when receiving a message sent by the LIN host and serving as a signal distribution node, the LIN communication fault injection device stores the message in the first buffer.
Step S20, modifying the packet in the first buffer according to the preconfigured fault injection rule.
Step S30, the modified message is sent to the LIN slave.
It is understood that the present embodiment further includes a step of pre-configuring the fault injection rule before step S10.
The upper computer adopts a CAN communication mode to realize the LIN communication fault injection setting, sets the ID, the message type, the message period, the data target value and the mask data value of LIN through parameters, and CAN realize the modification of the LIN communication message after the state is updated.
Wherein, before the step of modifying the packet in the first buffer according to the preconfigured fault injection rule, the method further includes:
judging whether the message in the first buffer area needs to be modified or not;
if yes, executing the step of modifying the message in the first buffer area according to a preconfigured fault injection rule;
and if not, sending the message in the first buffer area to the LIN slave.
When receiving a message sent by a master node as a signal distribution node from an LIN host, the LIN communication fault injection device stores the message in a first buffer area, and before the step of:
judging whether the LIN communication fault injection equipment receives a message sent by an LIN host computer and using a main node as a signal issuing node;
and if so, executing the step that the LIN communication fault injection equipment stores the message in the first buffer zone when receiving the message which is sent by the LIN host and takes the master node as the signal issuing node.
Wherein, the step of judging whether the LIN communication fault injection device receives a message sent by the LIN host and using the master node as a signal issuing node further comprises:
if not, sending a message frame header serving as a signal issuing node to the LIN slave machine at regular time;
storing the message replied by the LIN slave in a second buffer area;
modifying the message in the second buffer area according to a pre-configured fault injection rule when receiving a message frame header which is sent by the LIN host and takes the slave node as a signal issuing node;
and replying the modified message to the LIN host.
Wherein, the step of modifying the packet in the second buffer according to the preconfigured fault injection rule comprises:
judging whether the message in the second buffer area needs to be modified or not;
and if so, modifying the message in the second buffer area according to a preset fault injection rule.
Wherein, after the step of determining whether the message in the second buffer needs to be modified, the method further comprises:
and if not, the message in the second buffer area is replied to the LIN host.
Wherein, the step of determining whether the message in the second buffer needs to be modified comprises:
judging whether a message frame header of a slave node sent by the LIN host is received and used as a signal issuing node;
if yes, executing the step of judging whether the message in the second buffer area needs to be modified.
If not, returning to the step of judging whether the LIN communication fault injection equipment receives the message which is sent by the LIN host and takes the master node as the signal issuing node.
In the LIN communication fault injection method, the LIN communication fault injection equipment is portable equipment, the operation is simple, and the upper computer is set in a CAN communication mode to modify LIN communication messages between the host and the slave and realize a full-coverage test case; the LIN ID can be set, and the logic test of the master or the slave can be accurately carried out aiming at a certain fault. In addition, the codes can be debugged after being well connected in development, and the code compiling efficiency is greatly improved. The device designed by the invention is debugged and verified in a certain project, and a special code BUG is searched under the condition that the code writing efficiency of the controller is greatly improved as a result.
The technical innovation points of the LIN communication fault injection method are as follows:
1) and setting communication at the upper computer by utilizing a communication protocol between the host computer and the slave computer:
according to the test requirements and the complexity of different projects and different communication protocol complexity, the invention can be set at the PC end, so that the LIN communication fault injection equipment can simulate all functions of a host or a slave, thereby achieving the test purpose.
(2) The LIN communication fault injection equipment simultaneously has a host circuit and a slave circuit:
the LIN communication fault injection equipment is provided with the host circuit and the slave circuit at the same time, and can realize normal communication while isolating the original LIN bus in the process of data routing forwarding. The LIN communication fault injection equipment can also be used as a master or a slave to debug the controller independently.
(3) The independent development of LIN communication fault injection equipment has extremely low cost and convenient upgrade and maintenance
The LIN communication fault injection equipment used by the invention is completely and independently developed, has extremely low cost and is convenient to upgrade and maintain.
(4) The code can be debugged in development, normal communication or fault input can be completely covered in test, test resources are saved, and development efficiency is improved
By using the method, the LIN communication fault injection equipment is used as the slave machine, the response message of the slave machine can be completely simulated, debugging can be carried out just by code development, the BUG in software can be searched and solved more quickly, and the development efficiency is improved; the LIN communication fault injection equipment is used as a host, and according to software code logic, a demand message sent by the host to the slave is set, the running state of the slave is tested, and the running performance of the slave is ensured.
The LIN communication fault injection method has the beneficial effects that: according to the technical scheme, when the LIN communication fault injection equipment receives a message which is sent by an LIN host and takes a main node as a signal issuing node, the message is stored in a first buffer area; modifying the message in the first buffer area according to a preset fault injection rule; and the modified message is sent to the LIN slave, so that the accuracy of the LIN communication fault test is improved.
In order to achieve the above object, the present invention further provides a LIN communication fault injection system, where the system includes a memory, a processor, and a LIN communication fault injection program stored on the processor, and when the LIN communication fault injection program is executed by the processor, the steps of the method according to the above embodiment are performed, and are not described herein again.
In order to achieve the above object, the present invention further provides a computer-readable storage medium, where a LIN communication fault injection program is stored, where the LIN communication fault injection program is executed by a processor to perform the steps of the method according to the above embodiment, and details are not repeated here.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A LIN communication fault injection method, applied to a LIN communication fault injection device, comprising the steps of:
the LIN communication fault injection equipment stores a message in a first buffer area when receiving the message which is sent by an LIN host and takes a main node as a signal issuing node;
modifying the message in the first buffer area according to a preset fault injection rule;
and sending the modified message to the LIN slave.
2. The method of LIN communication fault injection of claim 1, wherein said step of modifying packets in said first buffer according to preconfigured fault injection rules further comprises, prior to said step of modifying packets in said first buffer:
judging whether the message in the first buffer area needs to be modified or not;
if yes, executing the step of modifying the message in the first buffer area according to a preconfigured fault injection rule;
and if not, sending the message in the first buffer area to the LIN slave.
3. The LIN communication fault injection method according to claim 1, wherein, when receiving a packet sent by a LIN host as a signal distribution node from a master node, the LIN communication fault injection device further comprises, before the step of storing the packet in a first buffer:
judging whether the LIN communication fault injection equipment receives a message sent by an LIN host computer and using a main node as a signal issuing node;
and if so, executing the step that the LIN communication fault injection equipment stores the message in the first buffer zone when receiving the message which is sent by the LIN host and takes the master node as the signal issuing node.
4. The LIN communication fault injection method according to claim 3, wherein the step of determining whether the LIN communication fault injection device receives a message sent by a LIN host that is a master node as a signal issuing node further comprises, after the step of:
if not, sending a message frame header serving as a signal issuing node to the LIN slave machine at regular time;
storing the message replied by the LIN slave in a second buffer area;
modifying the message in the second buffer area according to a pre-configured fault injection rule when receiving a message frame header which is sent by the LIN host and takes the slave node as a signal issuing node;
and replying the modified message to the LIN host.
5. The method of LIN communication fault injection of claim 4, wherein said step of modifying packets in said second buffer according to preconfigured fault injection rules is preceded by:
judging whether the message in the second buffer area needs to be modified or not;
and if so, modifying the message in the second buffer area according to a preset fault injection rule.
6. The method of injecting a LIN communication fault according to claim 5, wherein said step of determining whether a message in said second buffer needs to be modified further comprises:
and if not, the message in the second buffer area is replied to the LIN host.
7. The method of injecting a LIN communication fault according to claim 5, wherein said step of determining whether a message in said second buffer needs to be modified is preceded by:
judging whether a message frame header of a slave node sent by the LIN host is received and used as a signal issuing node;
if yes, executing the step of judging whether the message in the second buffer area needs to be modified.
If not, returning to the step of judging whether the LIN communication fault injection equipment receives the message which is sent by the LIN host and takes the master node as the signal issuing node.
8. The method of injecting a LIN communication fault according to any one of claims 1-7, wherein said method further comprises:
fault injection rules are pre-configured.
9. A LIN communication fault injection system, comprising a memory, a processor, and a LIN communication fault injection program stored on the processor, the LIN communication fault injection program when executed by the processor performing the steps of the method of any of claims 1 to 8.
10. A computer-readable storage medium, having stored thereon a LIN communication fault injection program which, when executed by a processor, performs the steps of a method as claimed in any one of claims 1 to 8.
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| CN202110811103.6A CN113595817A (en) | 2021-07-19 | 2021-07-19 | LIN communication fault injection method, system and storage medium |
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| CN202110811103.6A CN113595817A (en) | 2021-07-19 | 2021-07-19 | LIN communication fault injection method, system and storage medium |
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