CN102801572A - LIN (Local Interconnect Network) bus physical layer testing method - Google Patents
LIN (Local Interconnect Network) bus physical layer testing method Download PDFInfo
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- CN102801572A CN102801572A CN2011101389831A CN201110138983A CN102801572A CN 102801572 A CN102801572 A CN 102801572A CN 2011101389831 A CN2011101389831 A CN 2011101389831A CN 201110138983 A CN201110138983 A CN 201110138983A CN 102801572 A CN102801572 A CN 102801572A
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Abstract
The invention provides an LIN (Local Interconnect Network) bus physical layer testing method, which combines a local testing method with a collaborative testing method and aims to check whether an LIN bus system or a physical layer of an LIN bus node meets the requirement of an LIN bus protocol consistency or not. A testing LIN network and a tested LIN network respectively consist of an upper computer and a plurality of testing CLIN nodes through a USB (Universal Serial Bus)-to-LIN (or equipment with similar functions), so as to build an LIN bus physical layer testing platform. The upper computer downloads a test case and a test order to the testing LIN nodes through the testing LIN network, so that a testing result is obtained by comparing and analyzing communication content on the testing network and the tested network.
Description
Technical field
The present invention relates to the method for a kind of LIN of being used for (Local Interconnect Network) bus physical layer test, this method is used for checking tested LIN node or LIN bus system physical layer whether to satisfy the coherence request of LIN bus protocol.
Background technology
The LIN bus is a kind of network of serial communication cheaply, is used for realizing the distributed electronic system control of automobile.Do not needing CAN bus width and multi-functional occasion, using the LIN bus can save cost greatly such as the communication between intelligence sensor and the brake apparatus.Since exist subjective factor for understanding by the described LIN bus protocol of natural language, therefore, particularly important for the testing protocol consistency checking work of LIN bus physical layer.In order to check LIN node or LIN bus system physical layer whether to satisfy the coherence request of LIN bus protocol, need to propose a kind of LIN bus physical layer method of testing.
Summary of the invention
For whether the physical layer of checking LIN bus system or LIN node satisfies LIN bus protocol coherence request, the present invention proposes the LIN bus physical layer method of testing that a kind of local test method combines collaborative method of testing.Host computer and several tests LIN node are formed a test LIN network and a tested LIN network respectively through USB-to-LIN (the perhaps equipment of similar functions), make up a LIN bus physical layer test platform (as shown in Figure 1).Host computer draws test result through Content of Communication and tested network communication content on contrast, the judgement test network.Test command and test case arrive test node through test LIN network download.Wherein each test LIN node all has microcontroller and 2 road LIN communication systems, wherein one the road is connected to test LIN network, and another road is connected to tested LIN network.
Description of drawings
Accompanying drawing 1 is a kind of LIN bus physical layer test principle figure, wherein:
1. be host computer PC;
2. be test LIN network;
3. be tested LIN network;
4., 5. ... 6. be respectively LIN node 0, LIN node 1 ... LIN node n-1.
Embodiment
A kind of LIN bus physical layer of the present invention method of testing; Utilize host computer and several tests LIN node to form a test LIN network and a tested LIN network respectively, make up a LIN bus physical layer test platform (shown in accompanying drawing 1) through USB-to-LIN (the perhaps equipment of similar functions).Wherein each test LIN node all has microcontroller and 2 road LIN communication systems, wherein one the road is connected to test LIN network, and another road is connected to tested LIN network.
Wherein test network is the passage of test LIN node and host computer.To test LIN node, each is tested the correlation behavior information of LIN node and also returns host computer through this network through this network download for all test commands of host computer and test case.
Microcontroller is the processing center of test LIN node; Main processing is from the information of 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 LIN controller, comprise LIN Frame and LIN controller state.Monitoring, be embodied as LIN physical layer to be tested operational environment and network failure service are set.
Host computer is responsible for coordinating the work of whole test platform, and through the result to the LIN bus node that comes the analysis of the self-test LIN network and the tested LIN network information, draw to be tested or the test of LIN bus system physical layer.This judge conclusion comprises 3 kinds of situation:
(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. LIN bus physical layer method of testing; It is characterized in that: this method combines collaborative method of testing for the local test method; Utilize host computer and several tests LIN node to form a test LIN network and a tested LIN network respectively, make up a LIN bus physical layer test platform through USB-to-LIN (the perhaps equipment of similar functions).Host computer draws test result through Content of Communication and tested network communication content on contrast, the judgement test network.Test command and test case arrive test node through test LIN network download.
2. according to the described test of claim 1 LIN node, it is characterized in that: each test LIN node all has microcontroller and 2 road LIN communication systems, wherein one the road is connected to test LIN network, and another road is connected to tested LIN network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101389831A CN102801572A (en) | 2011-05-26 | 2011-05-26 | LIN (Local Interconnect Network) bus physical layer testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101389831A CN102801572A (en) | 2011-05-26 | 2011-05-26 | LIN (Local Interconnect Network) bus physical layer testing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102801572A true CN102801572A (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101389831A Pending CN102801572A (en) | 2011-05-26 | 2011-05-26 | LIN (Local Interconnect Network) bus physical layer testing method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060101317A1 (en) * | 2004-11-05 | 2006-05-11 | Renesas Technology Corp. | CAN system |
| CN1794123A (en) * | 2005-11-03 | 2006-06-28 | 重庆邮电学院 | Monitoring instrument of vehicle control system CAN/LIN network and its test method |
| CN101446623A (en) * | 2008-12-25 | 2009-06-03 | 北京中星微电子有限公司 | Testing method and testing system of USB controller |
| CN201527457U (en) * | 2009-11-11 | 2010-07-14 | 江苏亚华汽车电子有限公司 | Automobile electronic multifunctional test bench |
-
2011
- 2011-05-26 CN CN2011101389831A patent/CN102801572A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060101317A1 (en) * | 2004-11-05 | 2006-05-11 | Renesas Technology Corp. | CAN system |
| CN1794123A (en) * | 2005-11-03 | 2006-06-28 | 重庆邮电学院 | Monitoring instrument of vehicle control system CAN/LIN network and its test method |
| CN101446623A (en) * | 2008-12-25 | 2009-06-03 | 北京中星微电子有限公司 | Testing method and testing system of USB controller |
| CN201527457U (en) * | 2009-11-11 | 2010-07-14 | 江苏亚华汽车电子有限公司 | Automobile electronic multifunctional test bench |
Non-Patent Citations (1)
| Title |
|---|
| 姜开: "基于CAN总线的测试系统研究与设计", 《中国优秀硕士学位论文全文数据库》 * |
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Address after: 200092 Shanghai city Yangpu District Guokang Road No. 46 Tongji Science and Technology Building Room 406 Applicant after: Shanghai Gutai Technology Co., Ltd. Address before: 200092 room 510, science and Technology Park, Tongji University, 65 Chifeng Road, Shanghai, Yangpu District Applicant before: Shanghai Gutai Technology Co., Ltd. |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20121128 |