CN103414606A - FlexRay bus automated testing method based on hardware script - Google Patents
FlexRay bus automated testing method based on hardware script Download PDFInfo
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- CN103414606A CN103414606A CN2013103550634A CN201310355063A CN103414606A CN 103414606 A CN103414606 A CN 103414606A CN 2013103550634 A CN2013103550634 A CN 2013103550634A CN 201310355063 A CN201310355063 A CN 201310355063A CN 103414606 A CN103414606 A CN 103414606A
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Abstract
The invention relates to a testing system and method for a FlexRay bus. The system is composed of a microcontroller, at least two FlexRay controllers and a USB module, and is characterized in that the microcontroller is connected with the at least two FlexRay controllers, each FlexRay controller can be independently connected to the FlexRay bus, a testing script is edited on an upper computer, the upper computer compiles the testing script, then downloads the testing script into an internal storage of the microcontroller, and executes the testing script in the internal storage of the microcontroller, and automated testing is carried out on associated equipment with a FlexRay interface.
Description
Technical field
The present invention relates to the method for testing of electronic technology field, particularly a kind of method of testing for the FlexRay bus.
Background technology
FlexRay is a kind of confirmability of high speed for automobile, the bus system that possesses failure tolerant, FlexRay is by transmission of information in the time slot determining, and the failure tolerant on two passages and the transmission of redundant information, met the ever-increasing demand to the rate of information throughput especially failure tolerant and time determinability of new x-by-wire system thought.Along with the complexity of each microcontroller internal processes based on the FlexRay bus is more and more higher, just increasing problem may appear in actual applications, this just needs by the method based on the FlexRay bus test, to unit under test, send relevant message as test input, and the response message that obtains unit under test feeds back as content measurement, and the content of feedback and expection are compared, come to the same thing and think that the performance index of current test reach requirement, otherwise be not up to standard, need to modify and carry out repetition measurement the logic of microcontroller, thereby find as early as possible and deal with problems, guarantee reliability and the robustness of corresponding microcontroller in actual moving process.
Based on the FlexRay bus, tested ECU (Electrical Control Unit) is carried out to automatic test, common way is to write one by one test case for the entry of needs test, and on host computer, carry out one by one, by corresponding interface (such as USB, turning the equipment of FlexRay bus), the message that needs are sent is issued on the bus be connected with tested node, from bus, read simultaneously the response of tested node, thereby compare at host computer.
At host computer operation test script, have the following disadvantages: 1, host computer is non-real-time system, and there is unpredictable time delay in system, thereby can not guarantee that the message of precise time sends, and receives and timing function; 2, by specific FlexRay translation interface, computer is connected with the FlexRay bus, make an event on the FlexRay bus pass to host computer huge time overhead is arranged, usually be all Millisecond other, test macro can not be made response in time, testing efficiency is low.
Summary of the invention
Purpose of the present invention, exactly in order to overcome the defect of carrying out the real-time deficiency of FlexRay bus automatic test based on PC, a kind of scheme of hardware implement test script is provided, thereby eliminated the non real-time property of host computer and the impact that transmission delay is brought, improved testing efficiency and precision.
Concrete technical scheme provided by the invention is as follows:
A kind of bus of FlexRay based on hardware script automated testing method, use microcontroller to be connected with at least two FlexRay controllers, each FlexRay controller is connected to respectively on the FlexRay bus, in the microcontroller internal memory, carry out test script, the relevant device with FlexRay interface is carried out to automatic test.
A kind of bus of FlexRay based on hardware script automated testing method, comprise hardware circuit, program of lower computer and host computer procedure.
A kind of bus of FlexRay based on hardware script automated testing method, described hardware circuit consists of at least microcontroller, two FlexRay controllers, USB modules; Microcontroller is connected with at least two FlexRay controllers, and each FlexRay controller connects a FlexRay transceiver, and each FlexRay transceiver all is connected to one independently on the FlexRay bus.
A kind of bus of FlexRay based on hardware script automated testing method, described FlexRay controller is after listening to FlexRay message or erroneous frame on bus, by the data feedback monitored to microcontroller, microcontroller reads in local message reception buffer zone by it, and the data in reception buffer zone are uploaded to PC by the USB module.
A kind of bus of FlexRay based on hardware script automated testing method, described local message reception buffer zone, will be read by microcontroller, and carry out the comparison in test process, and comparison result is uploaded to host computer by the USB module.
A kind of bus of FlexRay based on hardware script automated testing method, after by described USB module, receiving the order of host computer, microcontroller is configured, comprises the configuration of carrying out test script, the configuration of FlexRay bus parameter, the startup of test and stopping etc.
A kind of bus of FlexRay based on hardware script automated testing method, described PC control can be controlled test process, by USB interface, the data of returning in test process is shown in Application Program Interface simultaneously.
A kind of bus of FlexRay based on hardware script automated testing method, described test script will be edited and compile in the Application Program Interface of host computer, and the content after compiling by USB interface downloads to, and slave computer is preserved and execution
A kind of bus of FlexRay based on hardware script automated testing method, its advantage be, 1, reasonable in design, and clear in structure, given full play to the microcontroller real-time good, and host computer has stronger text editing ability and the advantage of display capabilities; 2, real-time performance is good, and in the test script implementation, response can be accomplished the microsecond rank, and delay and the control data transmission of having eliminated system responses postpone, and efficiency is greatly improved
The accompanying drawing explanation
Fig. 1 is FlexRay bus automatic test hardware general frame figure in the invention process method
Fig. 2 is the flow chart of slave computer in the invention process method
Fig. 3 is host computer flow chart in the invention process method
In Fig. 1, microcontroller (101), FlexRay controller (102), FlexRay transceiver (103), FlexRay bus FlexRayH(104), FlexRay bus FlexRayL(105), USB module (106), PC (109), lower computer hardware circuit (110), USB line (111), tested node (112)
In Fig. 2, FlexRay controller reception buffer zone (201), the FlexRay controller sends buffering area (202), and local FlexRay sends buffering area (203), local FlexRay reception buffer zone (204), testing engine (205), the dependent event in test process (206), the test script compiled (207), test data reception buffer zone (208), test data sends buffering area (209), computer CPU (211), test configurations application program (212)
In Fig. 3, USB driver (301), USB reception buffer zone (302), data processor (303), USB sends buffering area (304), configuration data (305), script compile program (306), test script editing machine (307), test process display routine (308)
Embodiment
In Fig. 1, lower computer hardware circuit (110) comprises microcontroller (101), USB module (106) and FlexRay transceiver (103), lower computer hardware circuit (110) is connected to PC (109) by USB cable (111), simultaneously by FlexRay bus FlexRayH(104) and FlexRayL(105) be connected to tested node (112).
The inner integrated FlexRay transceiver of tested node (112) (103).
Microcontroller (101) connects at least two FlexRay controllers (102), the TX pin of each FlexRay controller and RX pin are connected respectively TX pin and the RX pin of FlexRay transceiver (103), the FlexRayH of FlexRay transceiver is connected to FlexRay bus FlexRayH(104), the FlexRayL of FlexRay transceiver is connected to the FlexRayL(105 of FlexRay bus).
Microcontroller (101), inner integrated CPU and internal memory, be connected with one or more independently FlexRay controllers; Or inner integrated one or more FlexRay controllers; What Fig. 1 showed is the situation of inner integrated two the FlexRay controllers of microcontroller (102).
FlexRay controller (102), protocol conversion chip as the FlexRay bus, be responsible for the information such as the message on the FlexRay bus and erroneous frame are fed back to microcontroller, each FlexRay controller has TX and the RX pin be connected with the FlexRay transceiver.
In Fig. 2, lower computer hardware circuit (110) is connected to PC (109) by USB cable (111), and PC (109) comprises at least one central processing unit (211), PC (109) internal operation test configurations application program (212).
Lower computer hardware circuit (110) is by connecting FlexRay bus FlexRayH(104) and FlexRay bus FlexRayL(105) communicate with tested node.
The flow process that lower computer hardware circuit (110) receives the message of tested node is, after its FlexRay controller (102) listens to the FlexRay message by FlexRay transceiver (103), by its buffer memory to inner FlexRay reception buffer zone (201), and notice microcontroller (101), microcontroller (101) is submitted to testing engine (205) by the message that calls receiver function (204) and will receive, testing engine (205) judges according to the receiving literary composition whether test case is passed through; Simultaneously microcontroller is saved in test data buffering area (209) by it, by USB module (106) by these data upload to PC (109).
The testing process of lower computer hardware circuit (110) is, slave computer microcontroller (101) is from reading the relevant test data from USB module (106) test data reception buffer zone (208), these test datas configure and issue by PC (109), microcontroller (101) always extracts the test script (207) compiled in the test data of self-test data reception buffer zone (208), and flow to testing engine (205), testing engine is based on the test script compiled (207), the message (204) returned according to current state-event (206) and tested node determines that current testing procedure is success or failure, and generation sends to the message of tested node, by sending function (203), will send to the message of tested node to put into the FlexRay transmission buffering area of FlexRay controller (102), via FlexRay controller (102), send to the FlexRayH(104 of FlexRay bus by FlexRay transceiver (103)) and FlexRayL(105) on.
In Fig. 3, the test configurations application program (212) of host computer internal operation is connected to USB cable (111) by USB driver (301), thereby and sets up usb communication between lower computer hardware circuit (110).
Host computer test configurations program (212) shows that the flow process of current test mode is, to put into USB reception buffer zone (302) from the usb data that slave computer is uploaded, again from reading out data USB reception buffer zone (302), and, after by data processor (303), processing, show via test process display routine (308).
Host computer test configurations program (212) to the process that lower computer hardware transmits test configurations is, the test script of use test script-editor (307) compiles user, and compile it as corresponding configuration data (305) by script compile program (306), and transfer data in USB transmission buffering area (304), via USB driver (301), be issued to slave computer.
Claims (8)
1. the bus of the FlexRay based on hardware script automated testing method, it comprises microcontroller, at least two FlexRay controllers, a USB module, it is characterized in that, use microcontroller to be connected with at least two FlexRay controllers, each FlexRay controller is connected to respectively on the FlexRay bus, at host computer editor test script, at host computer compiler test script, and by USB interface, the test script compiled is downloaded to slave computer, in the microcontroller internal memory of slave computer, carry out test script, relevant device with FlexRay interface is carried out to automatic test.
2. a kind of bus of FlexRay based on hardware script automated testing method according to claim 1, is characterized in that, system comprises hardware circuit, program of lower computer and host computer procedure.
3. a kind of bus of FlexRay based on hardware script automated testing method according to claim 2, is characterized in that, the hardware circuit of system consists of at least microcontroller, two FlexRay controllers, USB modules; Microcontroller is connected with at least two FlexRay controllers, and each FlexRay controller connects a FlexRay transceiver, and each FlexRay transceiver all is connected to one independently on the FlexRay bus.
4. a kind of bus of FlexRay based on hardware script automated testing method according to claim 3, it is characterized in that, the FlexRay controller of system is after listening to FlexRay message or erroneous frame on bus, by the data feedback monitored to microcontroller, microcontroller reads in local message reception buffer zone by it, and the data in reception buffer zone are uploaded to PC by the USB module.
5. a kind of bus of FlexRay based on hardware script automated testing method according to claim 4, it is characterized in that, microcontroller reads described local message reception buffer zone, and carries out the comparison in test process, and comparison result is uploaded to host computer by the USB module.
6. a kind of bus of FlexRay based on hardware script automated testing method according to claim 5, after by described USB module, receiving the order of host computer, program of lower computer is configured, comprise the configuration of carrying out test script, the configuration of FlexRay bus parameter, the startup of test and stopping etc.
7. a kind of bus of FlexRay based on hardware script automated testing method according to claim 2, it is characterized in that, described host computer procedure can be controlled test process, by USB interface, the data of returning in test process is shown in Application Program Interface simultaneously.
8. a kind of bus of FlexRay based on hardware script automated testing method according to claim 7, it is characterized in that, described test script will be edited and compile in the Application Program Interface of host computer, and the content after compiling by USB interface downloads to, and slave computer is preserved and execution.
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| CN2013103550634A CN103414606A (en) | 2013-08-14 | 2013-08-14 | FlexRay bus automated testing method based on hardware script |
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| CN105677560A (en) * | 2015-12-31 | 2016-06-15 | 北京经纬恒润科技有限公司 | Testing method, device and system |
| CN113077735A (en) * | 2020-01-06 | 2021-07-06 | 广州汽车集团股份有限公司 | Method, device and system for testing vehicle-mounted display equipment |
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| CN105677560A (en) * | 2015-12-31 | 2016-06-15 | 北京经纬恒润科技有限公司 | Testing method, device and system |
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| CN113077735A (en) * | 2020-01-06 | 2021-07-06 | 广州汽车集团股份有限公司 | Method, device and system for testing vehicle-mounted display equipment |
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Application publication date: 20131127 |