CN106921408B - Test system and method for serial bus communication circuit - Google Patents
Test system and method for serial bus communication circuit Download PDFInfo
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- CN106921408B CN106921408B CN201710016275.8A CN201710016275A CN106921408B CN 106921408 B CN106921408 B CN 106921408B CN 201710016275 A CN201710016275 A CN 201710016275A CN 106921408 B CN106921408 B CN 106921408B
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Abstract
The invention provides a test system and a test method of a serial bus communication circuit, wherein the system comprises an upper computer and a signal transmission board card; the signal transmission board card is provided with a first link interface communicated with a host of the equipment to be tested, a second link interface communicated with a control display unit of the equipment to be tested and a third link interface communicated with an upper computer, and the second link interface and the third link interface are respectively connected with the first link interface through communication lines; the first link interface is provided with a deserializer, and the second link interface is provided with a serializer; the host computer is configured to generate a simulation control instruction for controlling the display unit of the device to be tested, or acquire a display control signal sent by the host computer of the device to be tested to display the display content. The invention solves the problem that the existing test system depends on a mechanical arm and has higher test cost.
Description
Technical Field
The present invention relates to the field of electronic system testing, and more particularly, to a system and method for testing serial bus communication circuits.
Background
With the increase of safety and auxiliary electronics inside automobiles, the demand for high-speed interconnections in the automotive field has increased dramatically. The FPD-Link III (FPD video serial communication III) serial bus scheme supports full duplex control (I2C) that enables high speed video data transmission (LVDS) and bidirectional control communication over differential links. The size and weight of the interconnect lines are reduced while eliminating the bias problem and simplifying the system design. Due to the superiority of the FPD-Link III serial bus scheme, the scheme is more and more widely applied in the design of an automobile bus system, and meanwhile, the requirement for the automatic test of the FPD-Link III serial bus is increased.
The traditional automated testing scheme is mainly based on a manipulator plus machine vision mode: a camera bellows space is formed by the rack, the upper computer commands to control the robot hand to act, touch operation is carried out on the keys and the touch screen of the tested sample piece, and dynamic migration and identification are carried out on the interface state by machine vision. This scheme needs to be different according to the use scene, changes the manipulator to satisfy operation needs such as mechanical button, mechanical knob, touch screen button, single click, double click and slip, and the manipulator still need debug and regular maintenance, therefore the test cost is great.
Disclosure of Invention
The test system aims to solve the problems in the prior art, namely the problem that the existing test system depends on a mechanical arm and the test cost is high is solved. The invention provides a test system of a serial bus communication circuit, which comprises:
the upper computer and the signal transmission board card; the signal transmission board card is provided with a first link interface communicated with a host of the equipment to be tested, a second link interface communicated with a control display unit of the equipment to be tested and a third link interface communicated with an upper computer, and the second link interface and the third link interface are respectively connected with the first link interface through communication lines; the first link interface is provided with a deserializer, and the second link interface is provided with a serializer; the host computer is configured to generate a simulation control instruction for controlling the display unit of the device to be tested, or acquire a display control signal sent by the host computer of the device to be tested to display the display content.
Preferably, the deserializer and the serializer are connected through an LVDS bus and an I2And C, bus connection.
Preferably, the deserializer is a DS90ub948-Q1 chip and the serializer is a DS90ub947-Q1 chip.
Preferably, the first Link interface is connected with the host computer of the device to be tested through an FPD-Link III serial bus, and the second Link interface is connected with the control display unit of the device to be tested through the FPD-Link III serial bus.
Preferably, a switch circuit is arranged in a communication line between the second link interface and the first link interface; when the switch circuit is closed, the third link interface receives and sends a display control signal sent by the host machine of the equipment to be tested to the host machine; when the switch circuit is disconnected, the third link interface receives and sends a simulation control instruction of the device to be tested control display unit generated by the upper computer to the first link interface.
Preferably, the system further comprises a verification module; the verification module is configured to judge the correctness of the content displayed by the control display unit of the equipment to be tested by adopting a machine vision processing method, so as to judge the correctness of the communication information.
Correspondingly, based on the test system of the serial bus communication circuit, the invention also provides a test method of the serial bus communication circuit, which comprises the following steps:
step A1, inputting a simulation control instruction of the device to be tested for controlling the display unit through a third link interface;
step A2, sending the display data output by the host computer of the device to be tested after executing the simulation control instruction to the control display unit of the device to be tested through the first link interface and the second link interface for display; judging whether the display content is correct or not, and further judging the correctness of the communication information;
and step A3, repeating the step A1 and the step A2 until the set test times are finished.
Preferably, the simulation control command is a serial signal, and the simulation control command is input to the host of the device to be tested after deserializing.
Preferably, the simulation control instruction is I2And C, a signal.
Preferably, the method for determining whether the display content is correct in step a2 includes: and comparing the display content of the control display unit of the equipment to be tested with preset display content by adopting a machine vision processing method, judging whether the display content is correct or not, and further judging the correctness of the communication information.
In addition, based on the test system of the serial bus communication circuit, the invention also provides another test method of the serial bus communication circuit, which comprises the following steps:
and step B1, the device to be tested controls the display unit to generate a control instruction, the host computer of the device to be tested outputs display data according to the control instruction of the device to be tested controls the display unit, and the display data is deserialized through the deserializer of the first link interface to obtain multimedia data and a display control signal.
And step B2, the display control signal is sent to the upper computer through the third link interface, and the display content of the display control signal sent by the host computer of the equipment to be tested is displayed.
And step B3, inputting the multimedia data and the display control signal into the device to be tested to control the display unit for displaying after serial processing by the serializer of the second link interface.
And step B4, judging the consistency of the display results in the step B2 and the step B3, and further judging the correctness of the communication information.
And step B5, repeating the steps B1-B4 until the set test times are finished.
Preferably, the display data is a serial signal based on FPD-LINK III (FPD video serial communication III).
Preferably, the multimedia data is an LVDS signal.
Preferably, the display control signal is I2And C, a signal.
Preferably, the method of judging the consistency of the display results in the steps B2 and B3 in the step B4 includes: and comparing the display content of the control display unit of the equipment to be tested with the display content displayed by the upper computer by adopting a machine vision processing method, judging whether the display contents are consistent or not, and further judging the correctness of the communication information.
The test system of the serial bus communication circuit comprises an upper computer and a signal transmission board card; the signal transmission board card is provided with a first link interface communicated with a host of the equipment to be tested, a second link interface communicated with a control display unit of the equipment to be tested and a third link interface communicated with an upper computer, and the second link interface and the third link interface are respectively connected with the first link interface through communication lines; the first link interface is provided with a deserializer, and the second link interface is provided with a serializer; the host computer is configured to generate a simulation control instruction for controlling the display unit of the device to be tested, or acquire a display control signal sent by the host computer of the device to be tested to display the display content. The system can test the communication circuit through the simulation signal without the participation of a mechanical arm, thereby saving the test cost. In addition, the invention can simulate the proximity sensing through the simulation signal and control the newer application scenes such as gesture control to test the communication circuit.
Scheme 1 discloses a test system of a serial bus communication circuit, which is characterized by comprising an upper computer and a signal transmission board card;
the signal transmission board card is provided with a first link interface communicated with a host of equipment to be tested, a second link interface communicated with a control display unit of the equipment to be tested, and a third link interface communicated with the upper computer, and the second link interface and the third link interface are respectively connected with the first link interface through communication lines;
the first link interface is provided with a deserializer, and the second link interface is provided with a serializer;
the host computer is configured to generate a simulation control instruction for controlling the display unit of the device to be tested, or acquire a display control signal sent by the host computer of the device to be tested to display the display content.
Scheme 2 and the system according to scheme 1, wherein the deserializer and the serializer are connected through an LVDS bus and an I2And C, bus connection.
Scheme 3, the system of scheme 2, characterized in that, the deserializer is DS90ub948-Q1 chip, the serializer is DS90ub947-Q1 chip.
The system according to any one of the schemes 1 to 3, according to scheme 4, characterized in that the first Link interface is connected with the host of the device to be tested through an FPD-Link III serial bus, and the second Link interface is connected with the control display unit of the device to be tested through an FPD-Link III serial bus.
The system according to any one of claims 1 to 3, wherein a switching circuit is provided in a communication line between the second link interface and the first link interface;
when the switch circuit is closed, the third link interface receives and sends a display control signal sent by a host of the equipment to be tested to the upper computer;
and when the switch circuit is disconnected, the third link interface receives and sends a simulation control instruction of the to-be-tested equipment control display unit generated by the upper computer to the first link interface.
Scheme 6, the system according to any of schemes 1-3, characterized in that the system further comprises a verification module; the verification module is configured to judge the correctness of the content displayed by the control display unit of the equipment to be tested by adopting a machine vision processing method, so as to judge the correctness of the communication information.
The method for testing a serial bus communication circuit according to claim 7 is based on the system for testing a serial bus communication circuit according to any one of claims 1 to 6, and includes:
step A1, inputting a simulation control instruction of the device to be tested for controlling the display unit through a third link interface;
step A2, sending the display data output by the host computer of the device to be tested after executing the simulation control instruction to the control display unit of the device to be tested through the first link interface and the second link interface for display; judging whether the display content is correct or not, and further judging the correctness of the communication information;
and step A3, repeating the step A1 and the step A2 until the set test times are finished.
The method according to claim 8 or 7, wherein the simulation control command is a serial signal, and the simulation control command is input to the host of the device to be tested after deserialization.
Scheme 9, the method of claim 8, wherein the emulation control instruction is I2And C, a signal.
The method according to any one of claims 7 to 9, wherein the step a2 of determining whether the display content is correct includes:
and comparing the display content of the control display unit of the equipment to be tested with preset display content by adopting a machine vision processing method, judging whether the display content is correct or not, and further judging the correctness of the communication information.
The method according to claim 11 is a method for testing a serial bus communication circuit, based on the system for testing a serial bus communication circuit according to any one of claims 1 to 6, the method including:
step B1, the device to be tested controls the display unit to generate a control instruction, the host computer of the device to be tested outputs display data according to the control instruction of the device to be tested controls the display unit, and the display data is deserialized through the deserializer of the first link interface to obtain multimedia data and a display control signal;
step B2, the display control signal is sent to the upper computer through a third link interface, and display content of the display control signal sent by the host computer of the equipment to be tested is displayed;
step B3, the multimedia data and the display control signal are input to a device to be tested control display unit for display after being processed in series by a serializer of a second link interface;
step B4, judging the consistency of the display results in step B2 and step B3, and further judging the correctness of the communication information;
and step B5, repeating the steps B1-B4 until the set test times are finished.
Scheme 12 the method of claim 11, wherein the display data is serial signal based on FPD-LINK III (FPD video serial communication III).
Scheme 13, the method of claim 12, wherein the multimedia data is LVDS signals.
The method according to claim 14 or 12, wherein the display control signal is I2And C, a signal.
The method according to any one of claims 11 to 14, wherein the step B4 of determining the consistency of the display results in the steps B2 and B3 includes:
and comparing the display content of the control display unit of the equipment to be tested with the display content displayed by the upper computer by adopting a machine vision processing method, judging whether the display contents are consistent or not, and further judging the correctness of the communication information.
Drawings
FIG. 1 is a schematic structural diagram of a test system for a serial bus communication circuit according to a first embodiment of the present invention;
FIG. 2 is a flow chart illustrating a testing method of a serial bus communication circuit according to a second embodiment of the present invention;
fig. 3 is a flowchart illustrating a testing method of a serial bus communication circuit according to a third embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
First embodiment
Referring to fig. 1, fig. 1 is a schematic structural diagram illustrating a test system of a serial bus communication circuit according to a first embodiment of the present invention, and the specific structure includes:
and the upper computer 101, wherein the upper computer 101 is configured to generate a simulation control instruction of the device to be tested for controlling the display unit, or acquire a display control signal sent by the host computer of the device to be tested for displaying the display content. The display control unit of the device to be tested may be a device in which the control device and the display device are integrated, such as a touch screen display, or a device in which the control device and the display device are separated, such as a combination of a display screen and a knob or key control device.
The simulation control instruction generated by the upper computer 101 can simulate common application scenes such as knobs, keys, coordinate output and the like, and can simulate proximity sensing, and the newer application scenes such as gesture control are used for testing the communication circuit, so that the system can adapt to more application scenes compared with a traditional testing system using a mechanical arm.
The signal transmission board 102 is provided with a first link interface 1021 for communicating with a host of the device to be tested, a second link interface 1022 for communicating with a control display unit of the device to be tested, and a third link interface 1023 for communicating with the upper computer 101, wherein the second link interface 1022 and the third link interface 1023 are connected with the first link interface 1021 through communication lines respectively. Specifically, in this embodiment, the first Link interface 1021 is connected to the host of the device to be tested through the FPD-Link III serial bus, and the second Link interface 1022 is connected to the control display unit of the device to be tested through the FPD-Link III serial bus.
The signal transmission board 102 deserializes the serial signal output by the host of the device to be tested to obtain the display control signal therein, and sends the deserialized signal to the control display unit of the device to be tested after the display control signal is obtained and the deserialized signal is processed again. Therefore, the first link interface 1021 is provided with a deserializer for deserializing the signal, and the second link interface 1022 is provided with a serializer for serializing the signal.
In the present embodiment, the deserializer is a DS90ub948-Q1 chip, and the serializer is a DS90ub947-Q1 chip. Between the deserializer and the serializer via LVDS bus and I2And C, bus connection. LVDS bus for transmitting audio/video data to the control display unit of the device to be tested by the host of the device to be tested, I2The C bus is used for controlling the display unit to bidirectionally transmit control signals to the host of the device to be tested by the device to be tested.
The test system in this embodiment can test the device to be tested in the following two modes:
in the signal acquisition mode, at this time, the signal transmission board card 102 deserializes the serial signal output by the host of the device to be tested, obtains a display control signal according to the deserialized signal, and sends the display control signal to the upper computer 101 for analysis to obtain the display effect of the display control signal. And then, the deserialized signals are packaged in a serial mode again and sent to a control display unit of the equipment to be tested. The correctness of the communication information is judged by comparing the display effect of the display control signal analyzed by the upper computer 101 with the actual display effect of the control display unit of the equipment to be tested. And the equipment to be tested can be adjusted according to the comparison result.
Simulation test mode, in which the device under test controls the display unit to send control instructions to the host computer of the device under test2The line C is disconnected, the upper computer 101 generates a simulation control instruction, and the simulation control instruction is transmitted to the host of the device to be tested through the signal transmission board card 102. And then the signal transmission board card 102 transmits the display data output by the host of the device to be tested after executing the simulation control instruction to the control display unit of the device to be tested. And judging the correctness of the communication information according to the display result.
In order to realize that the user can switch between the two modes as required, the test system in this embodiment further includes a switch circuit 1024, and the switch circuit 1024 is disposed in the communication line between the second link interface 1022 and the first link interface 1021. When the switch circuit 1024 is closed, the device to be tested controls the display unit to normally send a control instruction to the host computer of the device to be tested, and at this time, the third link interface 1023 receives and sends a display control signal sent by the host computer of the device to be tested to the host computer 101, that is, at this time, the test system works in a signal acquisition mode; when the switch circuit 1024 is turned off, the channel through which the control display unit of the device to be tested can send the control instruction to the host of the device to be tested is turned off, and at this time, the third link interface 1023 receives and sends the simulation control instruction of the control display unit of the device to be tested, which is generated by the host computer 101, to the first link interface 1021, that is, the system works in the simulation test mode at this time.
The two modes relate to the judgment of the display content of the control display unit of the device to be tested. Specifically, in this implementation, the correctness of the content displayed by the control display unit of the device under test is determined by the verification module 103 by using a machine vision processing method, so as to determine the correctness of the communication information. When the test system works in the signal acquisition mode, the verification module 103 compares the display content of the control display unit of the device to be tested with the preset display content by using a machine vision processing method, judges whether the display content is correct, and further judges the correctness of the communication information. When the test system 103 works in the simulation test mode, the verification module 103 compares the display content of the control display unit of the device to be tested with the display content displayed by the upper computer 101 by using a machine vision processing method, determines whether the display contents are consistent, and further determines the correctness of the communication information.
The test system of the serial bus communication circuit in the embodiment comprises an upper computer and a signal transmission board card; the signal transmission board card is provided with a first link interface communicated with a host of the equipment to be tested, a second link interface communicated with a control display unit of the equipment to be tested and a third link interface communicated with an upper computer, and the second link interface and the third link interface are respectively connected with the first link interface through communication lines; the first link interface is provided with a deserializer, and the second link interface is provided with a serializer; the host computer is configured to generate a simulation control instruction for controlling the display unit of the device to be tested, or acquire a display control signal sent by the host computer of the device to be tested to display the display content. The system can test the communication circuit through the simulation signal without the participation of a mechanical arm, thereby saving the test cost. And the system can simulate the proximity sensing through the simulation signal, and the gesture control of the newer application scenes can be used for testing the communication circuit.
Second embodiment
Referring to fig. 2, fig. 2 is a schematic flow chart illustrating a testing method of a serial bus communication circuit according to a second embodiment of the present invention, which includes the following steps:
and S201, inputting a simulation control instruction of the device to be tested for controlling the display unit through the third link interface.
The simulation control command is I2The signal C is generated by the upper computer and used for simulating a control instruction output by the control display unit of the equipment to be tested, and the simulation control instruction generated by the upper computer can simulate common application scenes such as knobs, keys, coordinate output and the like, and can also simulate proximity sensing and gesture control of the novel application scenes to test the communication circuit, so that the method can be suitable for more application scenes compared with the traditional test method using the mechanical arm.
And S202, sending the display data output by the host of the device to be tested after executing the simulation control instruction to the device to be tested through the first link interface and the second link interface to control the display unit to display.
The display data is a serial signal, which includes multimedia data and a display control signal, and is used for enabling the device under test to control the display unit to display an output result of the host computer of the device under test after executing the simulation control instruction.
S203, judging whether the display content is correct or not, and further judging the correctness of the communication information.
The method for judging whether the display content is correct in the steps comprises the following steps: and comparing the display content of the control display unit of the equipment to be tested with preset display content by adopting a machine vision processing method, judging whether the display content is correct or not, and further judging the correctness of the communication information.
And S204, repeating the steps S201 to S203 until the set test times are finished.
In the test method of the serial bus communication circuit in the embodiment, a simulation control instruction of the device to be tested for controlling the display unit is input through the third link interface; the display data output after the host of the equipment to be tested executes the simulation control instruction is sent to the control display unit of the equipment to be tested through the first link interface and the second link interface to be displayed; and judging whether the display content is correct or not, and further judging the correctness of the communication information. The communication circuit is tested through the simulation signal, the participation of a mechanical arm is not needed, and the test cost is saved. In addition, the method can simulate the proximity sensing through the simulation signal, and the communication circuit can be tested by controlling the newer application scenes such as gesture control.
Third embodiment
Referring to fig. 3, fig. 3 is a schematic flow chart illustrating a testing method of a serial bus communication circuit according to a third embodiment of the present invention, which includes the following steps:
s301, the host of the device to be tested deserializes the display data output by the control instruction of the device to be tested control display unit through the deserializer of the first link interface to obtain multimedia data and a display control signal.
The control instruction is generated by the control display unit of the equipment to be tested, and can be generated by controlling the control display unit of the equipment to be tested through a control mechanical arm or directly generated by manually operating the control display unit of the equipment to be tested. The device to be tested may be a device in which the control device and the display device are integrated, such as a touch screen display, or a device in which the control device and the display device are separated, such as a combination of a display screen and a knob or key control device.
The display data is a serial signal based on FPD-LINK III (FPD video serial communication III). The multimedia data and the display control signal can be obtained after deserialization by the deserializer. The multimedia data is LVDS signals and is used for transmitting audio and video data. Display control signal is I2And the signal C is used for controlling the display mode and effect of the equipment to be tested to control the display unit.
And S302, the display control signal is sent to the upper computer through the third link interface, and display content of the display control signal sent by the host machine of the equipment to be tested is displayed.
In the above steps, after the upper computer receives the display control signal, the display control signal can be analyzed, so that the display effect of the display control signal is obtained and displayed to a user.
And S303, inputting the multimedia data and the display control signal into a control display unit of the equipment to be tested for display after serial processing by the serializer of the second link interface.
Because the device to be tested needs to receive the serial signal, the deserialized signal needs to be processed serially again and then sent to the device to be tested.
And S304, judging the consistency of the display results in S302 and S303, and further judging the correctness of the communication information.
The method for judging the consistency of the display result in the steps comprises the following steps: and comparing the display content of the control display unit of the equipment to be tested with the display content displayed by the upper computer by adopting a machine vision processing method, judging whether the display contents are consistent or not, and further judging the correctness of the communication information.
And S305, repeating the steps S301 to S304 until the set test times are finished.
In the test method of the serial bus communication circuit in this embodiment, the host of the device to be tested performs deserialization through the deserializer of the first link interface according to the display data output by the control instruction of the device to be tested controlling the display unit to obtain the multimedia data and the display control signal; sending the display control signal to an upper computer through a third link interface, and displaying the display content of the display control signal sent by the host machine of the equipment to be tested; and after being processed in series by the serializer of the second link interface, the multimedia data and the display control signal are input to a device to be tested to control a display unit to be displayed. And judging the consistency of the display results of the upper computer and the equipment to be tested, which controls the display unit, and further judging the correctness of the communication information. And the equipment to be tested can be debugged according to the judgment result without the participation of a mechanical arm, so that the test cost is saved.
Those of skill in the art will appreciate that the various illustrative modules, elements, and method steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate the interchangeability of electronic hardware and software. Whether such functionality is implemented as electronic hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (13)
1. A test system of a serial bus communication circuit is characterized by comprising an upper computer and a signal transmission board card;
the signal transmission board card is provided with a first link interface communicated with a host of equipment to be tested, a second link interface communicated with a control display unit of the equipment to be tested, and a third link interface communicated with the upper computer, and the second link interface and the third link interface are respectively connected with the first link interface through communication lines;
the first link interface is provided with a deserializer, and the second link interface is provided with a serializer;
the host computer is configured to generate a simulation control instruction of the control display unit of the equipment to be tested, or acquire a display control signal sent by the host computer of the equipment to be tested to display the display content;
the first Link interface is connected with a host of the equipment to be tested through an FPD-Link III serial bus, and the second Link interface is connected with a control display unit of the equipment to be tested through the FPD-Link III serial bus;
a switching circuit is arranged in a communication line between the second link interface and the first link interface so as to switch the test system between a signal acquisition mode and a simulation test mode through the operation of the switching circuit,
the switch circuit is constructed in a way that when the switch circuit is closed, the system works in a signal acquisition mode, namely, a third link interface receives and sends a display control signal sent by a host of equipment to be tested to the upper computer; and when the system is disconnected, the system works in a simulation test mode, namely, the third link interface receives and sends a simulation control instruction of the equipment to be tested control display unit generated by the upper computer to the first link interface.
2. The system of claim 1, wherein the deserializer and the serializer are connected by an LVDS bus and an I2And C, bus connection.
3. The system of claim 2, wherein the deserializer is a DS90ub948-Q1 chip and the serializer is a DS90ub947-Q1 chip.
4. The system according to any one of claims 1 to 3, further comprising a verification module; the verification module is configured to judge the correctness of the content displayed by the control display unit of the equipment to be tested by adopting a machine vision processing method, so as to judge the correctness of the communication information.
5. A test method of a serial bus communication circuit, based on the test system of the serial bus communication circuit of any one of claims 1 to 4, the method comprising:
step A1, inputting a simulation control instruction of the device to be tested for controlling the display unit through a third link interface;
step A2, sending the display data output by the host computer of the device to be tested after executing the simulation control instruction to the control display unit of the device to be tested through the first link interface and the second link interface for display; judging whether the display content is correct or not, and further judging the correctness of the communication information;
and step A3, repeating the step A1 and the step A2 until the set test times are finished.
6. The method of claim 5, wherein the emulation control command is a serial signal, and the emulation control command is input to the device under test host after being deserialized.
7. The method of claim 6, wherein the emulation control instruction is I2And C, a signal.
8. The method according to any one of claims 5 to 7, wherein the method for determining whether the display content is correct in step A2 comprises the following steps:
and comparing the display content of the control display unit of the equipment to be tested with preset display content by adopting a machine vision processing method, judging whether the display content is correct or not, and further judging the correctness of the communication information.
9. A test method of a serial bus communication circuit, based on the test system of the serial bus communication circuit of any one of claims 1 to 4, the method comprising:
step B1, the device to be tested controls the display unit to generate a control instruction, the host computer of the device to be tested outputs display data according to the control instruction of the device to be tested controls the display unit, and the display data is deserialized through the deserializer of the first link interface to obtain multimedia data and a display control signal;
step B2, the display control signal is sent to the upper computer through a third link interface, and display content of the display control signal sent by the host computer of the equipment to be tested is displayed;
step B3, the multimedia data and the display control signal are input to a device to be tested control display unit for display after being processed in series by a serializer of a second link interface;
step B4, judging the consistency of the display results in step B2 and step B3, and further judging the correctness of the communication information;
and step B5, repeating the steps B1-B4 until the set test times are finished.
10. The method of claim 9, wherein the display data is a serial signal based on FPD-LINK III (FPD video serial communication III).
11. The method of claim 10, wherein the multimedia data is an LVDS signal.
12. The method of claim 10, wherein the display control signal is I2And C, a signal.
13. The method according to any one of claims 9 to 12, wherein the method for judging the consistency of the display results in the steps B2 and B3 in the step B4 comprises the following steps:
and comparing the display content of the control display unit of the equipment to be tested with the display content displayed by the upper computer by adopting a machine vision processing method, judging whether the display contents are consistent or not, and further judging the correctness of the communication information.
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| CN106053983A (en) * | 2016-05-30 | 2016-10-26 | 苏州全威电子科技有限公司 | Automobile component testing machine and testing method thereof |
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| CN101639698A (en) * | 2009-08-26 | 2010-02-03 | 意昂神州（北京）科技有限公司 | Electrical test system and method of automotive body based on CAN bus |
| CN106053983A (en) * | 2016-05-30 | 2016-10-26 | 苏州全威电子科技有限公司 | Automobile component testing machine and testing method thereof |
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