CN102238046A - CAN (Controller Area Network) bus physical layer testing method - Google Patents
CAN (Controller Area Network) bus physical layer testing method Download PDFInfo
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- CN102238046A CN102238046A CN2010101680451A CN201010168045A CN102238046A CN 102238046 A CN102238046 A CN 102238046A CN 2010101680451 A CN2010101680451 A CN 2010101680451A CN 201010168045 A CN201010168045 A CN 201010168045A CN 102238046 A CN102238046 A CN 102238046A
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Abstract
The invention provides a CAN (Controller Area Network) bus physical layer testing method combining a local testing method and a collaborative testing method in order to inspect whether the physical layer of a CAN bus system or CAN bus node satisfies the consistency of CAN protocol. An upper computer and a plurality of testing CAN node respectively constitute a testing CAN and a tested CAN through USB-to-CAN (or device with similar functions) so as to construct a CAN bus physical layer testing platform. The upper computer downloads a test case and a test command to the testing CAN node through the testing CAN, and obtains the test result by contrasting and analyzing the communication contents on the testing network and tested network.
Description
Technical field
The present invention relates to the method for a kind of CAN of being used for (Controller Area Network controller local area network) bus physical layer test, this method is used for checking tested CAN node or CAN bus system physical layer whether to satisfy the coherence request of CAN agreement.
Background technology
The CAN bus is because its high-performance and reliability are widely used in aspects such as industrial automation, boats and ships, Medical Devices.Especially at vehicle electric field, the CAN bus often is used as in the dynamical system network directly related with safety, owing to exist subjective factor for understanding by the described CAN agreement of natural language, therefore, particularly important for the testing protocol consistency checking work of CAN bus system and CAN bus node.In order to check CAN node or CAN bus system physical layer whether to satisfy the coherence request of CAN agreement, need to propose a kind of CAN bus physical layer method of testing.
Summary of the invention
For whether the physical layer of checking CAN bus system or CAN node satisfies the requirement of CAN protocol conformance, the present invention proposes the CAN bus physical layer method of testing of a kind of local test method in conjunction with collaborative method of testing.Host computer and several testing CAN nodes are formed a testing CAN network and a tested CAN network respectively by USB-to-CAN (the perhaps equipment of similar functions), make up a CAN bus physical layer test platform (as shown in Figure 1).Host computer draws test result by Content of Communication and tested network communication content on contrast, the judgement test network.Test command and test case arrive test node by the testing CAN network download.Wherein each testing CAN node all has microcontroller and 2 road CAN communication systems, wherein one the road is connected to the testing CAN network, and another road is connected to tested CAN network.
Description of drawings
Accompanying drawing 1 is a kind of CAN bus physical layer test principle figure, wherein:
1. be host computer PC;
2. be the testing CAN network;
3. be tested CAN network;
4., 5. ... 6. be respectively CAN node 0, CAN node 1 ... CAN node n-1.
Embodiment
A kind of CAN bus physical layer of the present invention method of testing, utilize host computer and several testing CAN nodes to form a testing CAN network and a tested CAN network respectively, make up a CAN bus physical layer test platform (as shown in Figure 1) by USB-to-CAN (the perhaps equipment of similar functions).Wherein each testing CAN node all has microcontroller and 2 road CAN communication systems, wherein one the road is connected to the testing CAN network, and another road is connected to tested CAN network.
Wherein test network is the passage of testing CAN node and host computer.To the testing CAN node, the correlation behavior information of each testing CAN node is also returned host computer by this network by this network download for all test commands of host computer and test case.
Microcontroller is the processing center of testing CAN node, the main information of handling from test network, carry out the order of dependence test use-case, explain the test case order and monitor the relevant information that lower floor is provided with service and handles the CAN controller, comprise CAN Frame and CAN controller state.Monitoring, be embodied as tested CAN physical layer operational environment and network failure service are set.
Host computer is responsible for coordinating the work of whole test platform, and by to the analysis from the testing CAN network and the tested CAN network information, draws the CAN bus node tested or the result of CAN bus system physical layer test.This judge conclusion comprises 3 kinds of situations:
(1) passes through
Observed result satisfies test purpose, meets coherence request fully.
(2) failure
Observed result does not satisfy coherence request.Failure can be divided three classes: observed result does not reach test purpose; Test result satisfies test purpose but has mistake; Uncertainly whether satisfy test purpose.
(3) uncertain
Observed result satisfies coherence request, but does not determine whether to reach test purpose.
Claims (2)
1. CAN bus physical layer method of testing, it is characterized in that: this method is that the local test method is in conjunction with collaborative method of testing, utilize host computer and several testing CAN nodes to form a testing CAN network and a tested CAN network respectively, make up a CAN bus physical layer test platform by USB-to-CAN (the perhaps equipment of similar functions).Host computer draws test result by Content of Communication and tested network communication content on contrast, the judgement test network.Test command and test case arrive test node by the testing CAN network download.
2. according to the described testing CAN node of claim 1, it is characterized in that: each testing CAN node all has microcontroller and 2 road CAN communication systems, wherein one the road is connected to the testing CAN network, and another road is connected to tested CAN network.
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| CN2010101680451A CN102238046A (en) | 2010-05-06 | 2010-05-06 | CAN (Controller Area Network) bus physical layer testing method |
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| CN2010101680451A CN102238046A (en) | 2010-05-06 | 2010-05-06 | CAN (Controller Area Network) bus physical layer testing method |
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| CN102238046A true CN102238046A (en) | 2011-11-09 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103037001A (en) * | 2012-12-21 | 2013-04-10 | 北京时代凌宇科技有限公司 | Standard signal acquisition device and corresponding test method and system |
| CN103324557A (en) * | 2013-04-09 | 2013-09-25 | 浙江吉利汽车研究院有限公司杭州分公司 | CAN bus testing system and method |
| CN103368786A (en) * | 2012-04-10 | 2013-10-23 | 珠海格力电器股份有限公司 | Test method and test device of controller area network bus data |
| CN103873310A (en) * | 2012-12-10 | 2014-06-18 | 北汽福田汽车股份有限公司 | Gateway testing method and system for CAN network |
| CN104483042A (en) * | 2014-12-31 | 2015-04-01 | 四川金网通电子科技有限公司 | Cloud-based sensor numerical value demarcation system and method |
| CN105515911A (en) * | 2015-12-21 | 2016-04-20 | 惠州市德赛西威汽车电子股份有限公司 | Gateway automatic test system and method of CAN network |
| CN106019006A (en) * | 2016-05-17 | 2016-10-12 | 深圳市航盛电子股份有限公司 | System and method for testing CAN physical layer indexes |
| CN106773778A (en) * | 2016-11-21 | 2017-05-31 | 北京汽车股份有限公司 | Automobile CAN-bus physical layer simulation testing device and method |
| CN111314275A (en) * | 2019-11-09 | 2020-06-19 | 南京金龙客车制造有限公司 | Method for encrypting CAN (controller area network) of drive-by-wire chassis |
| CN114095903A (en) * | 2021-11-11 | 2022-02-25 | 盐城市华悦汽车部件有限公司 | Construction method of automobile electrical appliance network |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103368786A (en) * | 2012-04-10 | 2013-10-23 | 珠海格力电器股份有限公司 | Test method and test device of controller area network bus data |
| CN103368786B (en) * | 2012-04-10 | 2016-03-30 | 珠海格力电器股份有限公司 | The method of testing of CAN bus data and device |
| CN103873310A (en) * | 2012-12-10 | 2014-06-18 | 北汽福田汽车股份有限公司 | Gateway testing method and system for CAN network |
| CN103037001B (en) * | 2012-12-21 | 2016-07-13 | 北京时代凌宇科技有限公司 | A kind of standard signal acquisition device and accordingly method of testing and system |
| CN103037001A (en) * | 2012-12-21 | 2013-04-10 | 北京时代凌宇科技有限公司 | Standard signal acquisition device and corresponding test method and system |
| CN103324557A (en) * | 2013-04-09 | 2013-09-25 | 浙江吉利汽车研究院有限公司杭州分公司 | CAN bus testing system and method |
| CN104483042A (en) * | 2014-12-31 | 2015-04-01 | 四川金网通电子科技有限公司 | Cloud-based sensor numerical value demarcation system and method |
| CN105515911A (en) * | 2015-12-21 | 2016-04-20 | 惠州市德赛西威汽车电子股份有限公司 | Gateway automatic test system and method of CAN network |
| CN106019006A (en) * | 2016-05-17 | 2016-10-12 | 深圳市航盛电子股份有限公司 | System and method for testing CAN physical layer indexes |
| CN106773778A (en) * | 2016-11-21 | 2017-05-31 | 北京汽车股份有限公司 | Automobile CAN-bus physical layer simulation testing device and method |
| CN111314275A (en) * | 2019-11-09 | 2020-06-19 | 南京金龙客车制造有限公司 | Method for encrypting CAN (controller area network) of drive-by-wire chassis |
| CN114095903A (en) * | 2021-11-11 | 2022-02-25 | 盐城市华悦汽车部件有限公司 | Construction method of automobile electrical appliance network |
| CN114095903B (en) * | 2021-11-11 | 2024-05-14 | 盐城市华悦汽车部件有限公司 | Construction method of automobile electrical network |
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Application publication date: 20111109 |