CN106559286A - A kind of error-code testing method and system based on CAN - Google Patents
A kind of error-code testing method and system based on CAN Download PDFInfo
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- CN106559286A CN106559286A CN201611033763.1A CN201611033763A CN106559286A CN 106559286 A CN106559286 A CN 106559286A CN 201611033763 A CN201611033763 A CN 201611033763A CN 106559286 A CN106559286 A CN 106559286A
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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
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0823—Errors, e.g. transmission errors
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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
- 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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Environmental & Geological Engineering (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
The invention discloses a kind of error-code testing method and system based on CAN, produces frame, the figure that will be tested or self-defined word are placed on data field, send frames to corresponding bus according to CAN protocol；Frame is decoded according to CAN protocol, ID is filtered, the data for meeting the frame of condition are taken out, error code testing is carried out as figure to be tested or word；The data that the data for receiving and recipient prestore are contrasted, the data of continuous preseting length are identical, then it is assumed that synchronous success, the data for receiving and the data for prestoring are compared by unit data after synchronous success, it is then error code to differ, if error code, error code quantity adds one, constantly repeats；According to error code incremental data and the data amount check for receiving, the corresponding bit error rate is calculated.The present invention can carry out error code testing to the CAN frame of framing, by carrying out error code testing to CAN, with the correctness of real-time judge bus data, can lift the stability and jamproof ability of bus.
Description
Technical field
The present invention relates to a kind of error-code testing method and system based on CAN.
Background technology
The one kind of CAN as fieldbus, it is simple with system architecture, the characteristics of strong antijamming capability, also have
Certain fault-tolerant ability.Originally the data communication being made to solve in automobile between numerous control and measuring apparatus, later by
It is widely used in the other fields such as truck, oversize vehicle, ship, Aero-Space.With the expansion of CAN range of application
Greatly, also constantly perfect, the control system and tester based on CAN is also more and more, and CAN is total for CAN agreement
Line has purposes widely, and in long time from now on, CAN all can have most important in bus field at the scene
Status.
The operation principle of error code testing is：The pattern generator of error code testing system produces pseudo noise code or self-defining
Data, and system under test (SUT) is issued as test pattern, the pattern for receiving is sent to Error detection unit, error code system by system under test (SUT)
The number of bit errors in communication system is counted by Error detection unit；The number of bit errors for counting is carried out by internal logic control circuits
Calculate, draw the bit error rate.
Although CAN has higher stability, but still it cannot be guaranteed that bus occurs without mistake, CAN can be with
Support that multiple nodes, multiple nodes are communicated by CAN agreement, node is more, and the probability for occurring error code in bus is got over
Greatly, bus stability is also lower.Error code testing can produce the situation of error code during analogue communication, and artificial inserts in the bus
Enter error code, can interpolate that the disposal ability of error code occurs to bus in each node in bus.Error code survey is carried out to the data in bus
Examination, can monitor the mistake being likely to occur with real-time judge bus state, and according to the error code for detecting come to bus and bus
In each node be improved, lifted bus stability and jamproof ability.
The error-code testing method of generally CAN is by pseudo-random sequence or self-defining data insertion CAN association
CAN frames with error code are sent to error code recipient by the data field of view frame, and recipient is according to the CAN frames for receiving by data
Data in area are taken out, and the data to taking out carry out error code testing, determine whether error code and count error code number and error code
Rate.
But existing CAN tester product is varied, speed 5Kbps～1Mbps, mode of operation has at a high speed
Pattern, low speed fault-tolerant mode, monofilar mode, existing error code testing instrument support that the error code testing of non-frame, some buses have into
The error code testing of frame, such as RS232 buses, FC buses etc., existing CAN tester can not also support error code testing
The product of function.
The content of the invention
The present invention is in order to solve the above problems, it is proposed that a kind of error-code testing method and system based on CAN, this
It is bright to carry out error code testing to the CAN frame of framing, by carrying out error code testing to CAN, can be total with real-time judge
The correctness of line number evidence, lifts the stability and jamproof ability of bus.
To achieve these goals, the present invention is adopted the following technical scheme that：
A kind of error-code testing method based on CAN, comprises the following steps：
(1) frame is produced, the figure that will be tested or self-defined word are placed on sender and receiving side data area, assist according to CAN
View sends frames to corresponding bus；
(2) frame is decoded according to CAN protocol, ID is filtered, the data for meeting the frame of condition are taken out, as
Figure to be tested or word carry out error code testing；
(3) data of the data for receiving and recipient are contrasted, the data of continuous preseting length are identical, then it is assumed that same
Walk successfully, the data that (1) is arranged the step of the data received to recipient after synchronous success and recipient are by each length list
Position is compared, and identical is not then error code, and it is then error code to differ, if error code, error code quantity adds one；
(4) according to error code incremental data and the data amount check for receiving, calculate the corresponding bit error rate.
In the step (1), frame is the CAN protocol frame for meeting ISO11898 standards.
In the step (1), data type is normal data frame or growth data frame, and ID can set, and data length can set, and
Data length can not be 0, and frame period can set, and resolution chart includes pseudo-random sequence, full 0, complete 1 or self-defining word.
In the step (1), resolution chart or self-defining word are placed on into the data field of CAN protocol frame, radom insertion is missed
Code, the bit error rate can set, then be transmitted CAN protocol frame, and transmission process will observe CAN protocol.
In the step (2), when the data of bus transfer are received, arrange and filter ID, only receive the specific ID of setting
Frame.
In the step (4), the bit error rate that the bit error rate for calculating is arranged with sender is identical, then it represents that bus communication shape
State is normal, different then mistake occurs in expression bus.
In the step (4), by error code number divided by the data total number for receiving, the corresponding bit error rate is calculated.
A kind of test system of application said method, including CAN data generation module and error code testing statistical module,
Wherein：
There is module in the CAN data, be configured to produce the CAN protocol frame for meeting ISO11898 standards, frame
Data type is normal data frame or growth data frame, arranges corresponding ID, data length and frame period, by resolution chart or certainly
The word of definition is placed on the data field of CAN protocol frame, inserts error code, is then transmitted CAN protocol frame；
The error code testing statistical module, is configured to receive the data in bus, receives the frame of specific ID, judge frame number
Whether there is error code according in, and count corresponding error code quantity, calculate the bit error rate.
Beneficial effects of the present invention are：Traditional CAN tester has transmission, reception, filtration, triggering, statistics
Etc. function, the not function of error code testing, therefore effectively detection and statistics can not be carried out to the error code in bus, bus goes out
Can not find in time and process when existing mistake, error code testing is carried out to bus data, effectively solving can not be real-time
The problem whether monitoring bus correctly communicates.
Description of the drawings
Fig. 1 is the error code testing schematic diagram based on CAN.
Specific embodiment：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
The operation principle of frame format and error code testing of the present invention based on CAN, proposes a kind of mistake based on CAN
Code method of testing, which includes at least following two main functional modules, as shown in Figure 1.
1) there is module in CAN data：Generation meets the CAN protocol frame of ISO11898 standards, and data type is standard
Frame or growth data frame, ID can set, and data length can set (can not be 0), and frame period can set, and resolution chart includes pseudorandom
Resolution chart or self-defining word are placed on the data field of CAN protocol frame by sequence, full 0, complete 1 or self-defining word, be can be inserted into and are missed
Code, the bit error rate can set, then be transmitted CAN protocol frame, and transmission process will observe CAN protocol.
2) error code testing statistical module：This module can be arranged in recipient for the data in bus receive
Filter ID, only receives the frame of specific ID, and determines whether error code, calculates the bit error rate.The resolution chart of receiver module and transmission mould
Block is identical, also comprising pseudo-random sequence, full 0, complete 1 or self-defining word, after receiver module process, error code number and error code
Rate can be displayed in statistics.
The workflow of the error-code testing method based on CAN proposed by the present invention is：
Step 1：There is module and produce frame in agreement, the figure that will be tested or self-defined word are placed on data field, assist according to CAN
View sends frames to bus；
Step 2：The frame for receiving is decoded by receiver module according to CAN protocol, and ID is filtered, and will meet condition
Frame data take out, carry out error code testing as figure to be tested or word；
Step 3：The data that the data for receiving and recipient prestore are contrasted, continuous 32 bits are identical, then it is assumed that
The data for receiving and the data for prestoring are compared after synchronous success by synchronous success by bit, and identical is not then error code, no
Identical is then error code, if error code, bit error code number adds 1；
Step 4：The bit error rate is calculated with the data amount check for receiving by bit error code number.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not to present invention protection model
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
The various modifications made by needing to pay creative work or deformation are still within protection scope of the present invention.
Claims (8)
1. a kind of error-code testing method based on CAN, is characterized in that：Comprise the following steps：
(1) frame is produced, the figure that will be tested or self-defined word are placed on sender and receiving side data area, will according to CAN protocol
Frame is sent to corresponding bus；
(2) frame is decoded according to CAN protocol, ID is filtered, the data that will meet the frame of condition are taken out, used as will survey
The figure or word of examination carries out error code testing；
(3) data of the data for receiving and recipient are contrasted, the data of continuous preseting length are identical, then it is assumed that it is synchronous into
The data that the step of work(, data received to recipient after synchronous success and recipient (1) is arranged are entered by each long measure
Row compares, and identical is not then error code, and it is then error code to differ, if error code, error code quantity adds one；
(4) according to error code incremental data and the data amount check for receiving, calculate the corresponding bit error rate.
2. a kind of error-code testing method based on CAN as claimed in claim 1, is characterized in that：In the step (1),
Frame is the CAN protocol frame for meeting ISO11898 standards.
3. a kind of error-code testing method based on CAN as claimed in claim 1, is characterized in that：In the step (1),
Data type is normal data frame or growth data frame, and ID can set, and data length can set, and data length can not be 0, frame period
Can set, resolution chart includes pseudo-random sequence, full 0, complete 1 or self-defining word.
4. a kind of error-code testing method based on CAN as claimed in claim 1, is characterized in that：In the step (1),
Resolution chart or self-defining word are placed on into the data field of CAN protocol frame, radom insertion error code, the bit error rate can set, then by CAN
Protocol frame is transmitted, and transmission process will observe CAN protocol.
5. a kind of error-code testing method based on CAN as claimed in claim 1, is characterized in that：In the step (2),
When the data of bus transfer are received, arrange and filter ID, only receive the frame of the specific ID of setting.
6. a kind of error-code testing method based on CAN as claimed in claim 1, is characterized in that：In the step (4),
The bit error rate that the bit error rate for calculating is arranged with sender is identical, then it represents that bus communication state is normal, different then represent bus
There is mistake.
7. a kind of error-code testing method based on CAN as claimed in claim 1, is characterized in that：In the step (4),
By error code number divided by the data total number for receiving, the corresponding bit error rate is calculated.
8. a kind of method testing system of application as any one of claim 1-7, is characterized in that：Including CAN
There is module and error code testing statistical module in data, wherein：
There is module in the CAN data, be configured to produce the CAN protocol frame for meeting ISO11898 standards, the data of frame
Type is normal data frame or growth data frame, arranges corresponding ID, data length and frame period, by resolution chart or self-defined
Word be placed on the data field of CAN protocol frame, insert error code, then CAN protocol frame be transmitted；
The error code testing statistical module, is configured to receive the data in bus, receives the frame of specific ID, in judging frame data
Whether there is error code, and count corresponding error code quantity, calculate the bit error rate.
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| CN201611033763.1A CN106559286A (en) | 2016-11-15 | 2016-11-15 | A kind of error-code testing method and system based on CAN |
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| CN201611033763.1A CN106559286A (en) | 2016-11-15 | 2016-11-15 | A kind of error-code testing method and system based on CAN |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107566085A (en) * | 2017-09-04 | 2018-01-09 | 中国电子科技集团公司第四十研究所 | A kind of bit error code method of testing and system based on FC buses |
| CN108737038A (en) * | 2018-05-14 | 2018-11-02 | 西京学院 | Communicate error code device |
| CN110650066A (en) * | 2019-09-27 | 2020-01-03 | 南京工程学院 | Embedded bus communication detection system and reliability detection method thereof |
| CN110798386A (en) * | 2019-11-12 | 2020-02-14 | 中电科仪器仪表有限公司 | Configurable CAN bus protocol transceiving test method and system |
| CN111313992A (en) * | 2020-03-11 | 2020-06-19 | 智慧航海（青岛）科技有限公司 | Intelligent ship communication performance testing method and system |
| CN111880983A (en) * | 2020-08-04 | 2020-11-03 | 北京天融信网络安全技术有限公司 | CAN bus abnormality detection method and device |
| CN113162827A (en) * | 2021-04-23 | 2021-07-23 | 中国科学院地质与地球物理研究所 | Error rate testing method and system for underground single-core bus system |
| CN114144997A (en) * | 2019-06-03 | 2022-03-04 | 罗伯特·博世有限公司 | Error detection test device for a subscriber station of a serial bus system and method for testing a mechanism for error detection in communication in a serial bus system |
| CN114363229A (en) * | 2022-01-05 | 2022-04-15 | 瞬联软件科技（北京）有限公司 | Self-checking method and self-checking device for vehicle-mounted machine test |
| CN114710423A (en) * | 2022-04-07 | 2022-07-05 | 四川灵通电讯有限公司 | Error code testing method of data chain system |
| CN115484515A (en) * | 2022-08-26 | 2022-12-16 | 四川九州电子科技股份有限公司 | Statistical method for error rate in running test |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107566085A (en) * | 2017-09-04 | 2018-01-09 | 中国电子科技集团公司第四十研究所 | A kind of bit error code method of testing and system based on FC buses |
| CN108737038A (en) * | 2018-05-14 | 2018-11-02 | 西京学院 | Communicate error code device |
| CN114144997A (en) * | 2019-06-03 | 2022-03-04 | 罗伯特·博世有限公司 | Error detection test device for a subscriber station of a serial bus system and method for testing a mechanism for error detection in communication in a serial bus system |
| CN114144997B (en) * | 2019-06-03 | 2023-06-27 | 罗伯特·博世有限公司 | Error detection test device for subscriber stations of a serial bus system and method for detecting a mechanism for error detection in a communication in a serial bus system |
| CN110650066A (en) * | 2019-09-27 | 2020-01-03 | 南京工程学院 | Embedded bus communication detection system and reliability detection method thereof |
| CN110798386A (en) * | 2019-11-12 | 2020-02-14 | 中电科仪器仪表有限公司 | Configurable CAN bus protocol transceiving test method and system |
| CN111313992A (en) * | 2020-03-11 | 2020-06-19 | 智慧航海（青岛）科技有限公司 | Intelligent ship communication performance testing method and system |
| CN111880983A (en) * | 2020-08-04 | 2020-11-03 | 北京天融信网络安全技术有限公司 | CAN bus abnormality detection method and device |
| CN113162827A (en) * | 2021-04-23 | 2021-07-23 | 中国科学院地质与地球物理研究所 | Error rate testing method and system for underground single-core bus system |
| CN114363229A (en) * | 2022-01-05 | 2022-04-15 | 瞬联软件科技（北京）有限公司 | Self-checking method and self-checking device for vehicle-mounted machine test |
| CN114710423A (en) * | 2022-04-07 | 2022-07-05 | 四川灵通电讯有限公司 | Error code testing method of data chain system |
| CN115484515A (en) * | 2022-08-26 | 2022-12-16 | 四川九州电子科技股份有限公司 | Statistical method for error rate in running test |
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