CXPI communication test system and equipment for automobile instrument

Abstract

The utility model provides a CXPI communication test system and equipment for an automobile instrument. The CXPI communication test system comprises a DIO control module, a CAN communication module, a CXPI TOOL module and an upper computer module, one end of the DIO control module is electrically connected with a tested automobile instrument, the other end of the DIO control module is electrically connected with the upper computer module, one end of the CAN communication module is electrically connected with the tested automobile instrument, the other end of the CAN communication module is electrically connected with the upper computer module, one end of the CXPI TOOL module is electrically connected with the tested automobile instrument, and the other end of the CXPI TOOL module is electrically connected with the tested automobile instrument. And the other end of the CXPI TOOL module is electrically connected with the upper computer module. According to the scheme of the utility model, the test method is short in test time and strong in interference resistance, so that the test is more efficient, stable and accurate.

Description

Technical Field

[0001] The utility model relates to the field of automobile instrument testing devices, in particular to a CXPI communication testing system and equipment for automobile instruments. Background Art

[0002] With the development of science and technology and the improvement of people's living standards, cars are becoming more and more popular. Since the car itself is a complex system, its various performance indicators have a great impact on car safety and driving comfort. Therefore, automobile testing technology has also developed along with the continuous development of automobile technology. It uses automated testing methods to accurately reflect the performance status and use of various parts, systems, etc. of the car in real time without damaging the car, so as to timely discover fault points or hidden dangers and ensure that the car is driving in a stable and good technical condition.

[0003] At present, the communication test of automobile instruments is mainly HS-CAN communication. When the CXPI communication protocol is added, there is no stable and efficient tool test. The waveform test method is currently used. The disadvantages of this test method are long test time, poor anti-interference, and easy misjudgment. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide a CXPI communication test system and equipment for automobile instruments.

[0005] According to the utility model, a CXPI communication test system for automobile instruments includes: a DIO control module, a CAN communication module, a CXPI TOOL module and a host computer module;

[0006] One end of the DIO control module is electrically connected to the automobile instrument under test, and the other end of the DIO control module is electrically connected to the host computer module. One end of the CAN communication module is electrically connected to the automobile instrument under test, and the other end of the CAN communication module is electrically connected to the host computer module. One end of the CXPI TOOL module is electrically connected to the automobile instrument under test, and the other end of the CXPI TOOL module is electrically connected to the host computer module.

[0007] Preferably, the CXPI TOOL module comprises a CXPI signal transceiver circuit, a signal input end of the CXPI signal transceiver circuit is electrically connected to the automobile instrument under test, and a signal output end of the CXPI signal transceiver circuit is electrically connected to the host computer module.

[0008] Preferably, the DIO module includes a plurality of control switches Kn, and the control switches Kn are respectively connected in series between the CAN communication module and the automobile instrument under test, and between the CXPI TOOL module and the automobile instrument under test, and the plurality of control switches Kn are electrically connected to the host computer module.

[0009] Preferably, the CXPI TOOL module includes a USB port, a power supply port, and a communication port; the USB port is electrically connected to the host computer module, the power supply port is electrically connected to an external power supply to provide a working voltage for the CXPI TOOL module; the communication port is electrically connected to the CXPI port of the automotive instrument under test through a DIO module.

[0010] Preferably, the CAN communication module includes a COM port, a power supply port, a HSCAN+ port and a HSCAN- port; the COM port is electrically connected to the host computer module, the power supply port is electrically connected to an external power supply to provide a working voltage for the CAN communication module, the HSCAN+ port is electrically connected to the CAN_H port on the vehicle instrument under test, and the HSCAN- port is electrically connected to the CAN_L port on the vehicle instrument under test.

[0011] Preferably, a product power supply is also included, and the product power supply provides working power for other modules and the automobile instrument under test.

[0012] Preferably, the host computer module is electrically connected to the DIO control module and the CAN communication module via RS232 protocol.

[0013] A CXPI communication test device for an automobile instrument provided according to the present invention comprises the above-mentioned CXPI communication test system for an automobile instrument.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model adopts the CXPI TOOL module to test CXPI communication. Compared with the waveform test method adopted by the existing automobile instrument test tool, the test method of the utility model has a short test time and strong anti-interference, making the test more efficient, stable and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0017] Figure 1 This is a schematic diagram of the structure of the CXPI communication test system for automobile instruments in the utility model;

[0018] Figure 2This is a circuit diagram of the CXPI communication test system for the automotive instrument in the utility model;

[0019] Figure 3 It is a schematic diagram of the CXPI TOOL module in the utility model. DETAILED DESCRIPTION

[0020] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

[0021] The utility model discloses a CXPI communication test system for automobile instruments, referring to Figure 1 and Figure 2 As shown, it includes: DIO control module, CAN communication module, CXPI TOOL module (clock extension peripheral interface communication protocol tool), host computer module and product power supply.

[0022] DIO control module: The main function of this module is to control the action of the fixture, power on the product and establish communication with the product through RS232 communication, so as to realize CXPI communication test. The DIO control module can automatically open or close the connection between the vehicle instrument and various tool instruments to meet the current test requirements.

[0023] CAN communication module; the main function of this module is to send TestPresent and enter EOL mode and test CXPI instructions to the vehicle instrument, so that the product can send CXPI Frame to CXPI TOOL for testing.

[0024] CXPI TOOL module; the main function of this module is to receive the CXPI Frame sent by the product, analyze and process whether the signal is correct, and then send the judgment result to the host computer.

[0025] The connection relationship between the above modules is:

[0026] One end of the CAN communication module is electrically connected to the vehicle instrument under test, and the other end of the CAN communication module is electrically connected to the host computer module through the RS232 communication protocol. One end of the CXPI TOOL module is electrically connected to the vehicle instrument under test, and the other end of the CXPI TOOL module is electrically connected to the host computer module through the RS232 communication protocol. The DIO module includes multiple control switches Kn, which are respectively connected in series between the CAN communication module and the vehicle instrument under test, and between the CXPI TOOL module and the vehicle instrument under test. Multiple control switches Kn are electrically connected to the host computer module. The product power supply provides working power for other modules and the vehicle instrument under test.

[0027] Reference Figure 3 As shown, the CXPI TOOL module includes a CXPI signal transceiver circuit, the signal input end of the CXPI signal transceiver circuit is electrically connected to the vehicle instrument under test, and the signal output end of the CXPI signal transceiver circuit is electrically connected to the host computer module. The CXPI TOOL module includes a USB port, a power supply port, and a communication port; the USB port is electrically connected to the host computer module, the power supply port is electrically connected to an external power supply, and provides a working voltage for the CXPI TOOL module; the communication port is electrically connected to the CXPI port of the vehicle instrument under test through the DIO module.

[0028] The CAN communication module includes a COM port, a power supply port, a HSCAN+ port and a HSCAN- port; the COM port is electrically connected to the host computer module, the power supply port is electrically connected to the external power supply to provide working voltage for the CAN communication module, the HSCAN+ port is electrically connected to the CAN_H port on the vehicle instrument under test, and the HSCAN- port is electrically connected to the CAN_L port on the vehicle instrument under test.

[0029] The present application scheme is further explained below in conjunction with the working principle of the CXPI communication test system for automobile instruments.

[0030] DIO control module function process:

[0031] ①DIO communicates with the host computer through RS232 communication to initialize the IO device.

[0032] ②DIO controls the clamping cylinder of the fixture to clamp the product, and then IO controls the product connector cylinder to connect the product.

[0033] ③ Use IO to connect the product's Battery and IGN Relay. The host computer and PSS-2005 power supply output 13.5V voltage, and the product powers on and lights up normally.

[0034] Product enters EOL mode process:

[0035] ① The host computer and CAN tool initialize the instrument through RS232 communication, setting Baud Rate = 115200b / s, Data Bits = 8, Parity = None.

[0036] ②Import the command file containing Emulation and download it to the CAN tool.

[0037] ③Send Msg1=0x7C0 04 2E FD 00 01, the product enters MEET mode; send Msg2=0x7C0 021060, the product enters EOL mode; send Msg3=0x7C0 02 3E 80 00 00 00 00 00 (Tester Present) every 3000ms so that the product remains in EOL mode.

[0038] CXPI TOOL test process:

[0039] ①Configure CXPI TOOL parameters: Type = Incoming / Outgoing Frame, Protocol = CXPI,

[0040] Channel = 1, Status = All

[0041] ② When the product is in EOL mode, send 0x7C0 05 31 03FA 40 38 to the product through the CAN tool.

[0042] ③The product generates a CXPI Frame and sends it to CXPI TOOL

[0043] ④CXPI TOOL automatically searches for the frame with PID 0x38 (message CXMET1S02) from the received frame and determines whether it is No Error

[0044] ⑤The host computer reads the results given by CXPI TOOL through USB and gives the final test results

[0045] ⑥CAN TOOL sends 0x7C0 04 2E FD 00 00, the product exits EOL mode and MEET mode; to stop the cycle, send 0x7C0 02 3E 80 00 00 00 00 00 (Tester Present)

[0046] ⑦ Cut off the power to the product through the DIO module and release the fixture.

[0047] ⑧The entire testing process is completed.

[0048] The utility model also discloses a CXPI communication test device for automobile instruments. The device can be various portable devices or integrated in other fixed devices. The device includes the above-mentioned CXPI communication test system for automobile instruments.

[0049] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0050] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A CXPI communication test system for automobile instruments, characterized in that: include: DIO control module, CAN communication module, CXPI TOOL module and host computer module One end of the DIO control module is electrically connected to the automobile instrument under test, and the other end of the DIO control module is electrically connected to the host computer module. One end of the CAN communication module is electrically connected to the automobile instrument under test, and the other end of the CAN communication module is electrically connected to the host computer module. One end of the CXPI TOOL module is electrically connected to the automobile instrument under test, and the other end of the CXPI TOOL module is electrically connected to the host computer module.

2. The CXPI communication test system for automobile instruments according to claim 1, characterized in that: The CXPI TOOL module includes a CXPI signal transceiver circuit, a signal input end of the CXPI signal transceiver circuit is electrically connected to the automobile instrument under test, and a signal output end of the CXPI signal transceiver circuit is electrically connected to the host computer module.

3. The CXPI communication test system for automobile instruments according to claim 1, characterized in that: The DIO module includes a plurality of control switches Kn, which are respectively connected in series between the CAN communication module and the automobile instrument under test, and between the CXPI TOOL module and the automobile instrument under test, and the plurality of control switches Kn are electrically connected to the host computer module.

4. The CXPI communication test system for automobile instruments according to claim 1, characterized in that: The CXPI TOOL module includes a USB port, a power supply port, and a communication port; the USB port is electrically connected to the host computer module, the power supply port is electrically connected to an external power supply to provide a working voltage for the CXPI TOOL module; the communication port is electrically connected to the CXPI port of the tested automobile instrument through a DIO module.

5. The CXPI communication test system for automobile instruments according to claim 1, characterized in that: The CAN communication module includes a COM port, a power supply port, a HSCAN+ port and a HSCAN- port; the COM port is electrically connected to the host computer module, the power supply port is electrically connected to an external power supply to provide a working voltage for the CAN communication module, the HSCAN+ port is electrically connected to a CAN_H port on a vehicle instrument under test, and the HSCAN- port is electrically connected to a CAN_L port on a vehicle instrument under test.

6. The CXPI communication test system for automobile instruments according to claim 1, characterized in that: It also includes a product power supply, which provides working power for other modules and the automotive instrument under test.

7. The CXPI communication test system for automobile instruments according to claim 1, characterized in that: The host computer module is electrically connected to the DIO control module and the CAN communication module via the RS232 protocol.

8. A CXPI communication test device for automobile instruments, characterized in that: A CXPI communication test system for an automobile instrument comprising the method described in any one of claims 1 to 7.

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