CN114764235A - SERDES interface testing system and method for serializer/deserializer - Google Patents
SERDES interface testing system and method for serializer/deserializer Download PDFInfo
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
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Abstract
The embodiment of the application provides a serializer/deserializer SERDES interface test system and a method, and the system comprises: the input device, the test conversion assembly, the cabin domain controller and the display screen are connected in sequence; the input device is used for acquiring display attribute information from the test conversion assembly and sending an image signal to the test conversion assembly according to the display attribute information; the display attribute information comprises a data format supported by the test conversion component; the test conversion component is used for converting the image signal sent by the input device into a serial SERDES signal supported by the cockpit area controller; the cockpit domain controller is used for converting the serial SERDES signal into a parallel image signal and transmitting the image signal to the display screen for display. The system of the embodiment of the application realizes the testing of the SERDES interface of the cockpit area controller, has low cost, realizes the modular design and the decoupling of the cockpit area controller and other area controllers.
Description
Technical Field
The embodiment of the application relates to the technical field of communication, in particular to a SERDES interface testing system and method for a serializer/deserializer.
Background
Intelligence passenger cabin, popular say that it is intelligent car inner space exactly, along with the improvement of car electronization degree, on-vehicle entertainment system has been integrated, streaming media central authorities rear-view mirror, new line Display (Head Up Display, HUD), full liquid crystal instrument, the intelligent passenger cabin of car networking module etc. will bring more intelligence, safe mutual experience, simultaneously along with the development of autopilot technique, the interface between autopilot domain controller and the intelligent passenger cabin domain controller becomes key interface, consequently need test the interface between this autopilot domain controller and the intelligent passenger cabin domain controller and verify.
At present, a SERializer/DESerializer (SERDES) interface is widely used as an interface between an automatic driving domain controller and an intelligent cockpit domain controller. As shown in fig. 1, if the SERDES interface is to be tested and verified, a camera needs to be built and input to the autopilot domain controller, and then the camera is output to the intelligent cockpit domain controller through a serializer of the autopilot domain controller and then output to a screen for display. In the scheme, the camera and the automatic driving area controller need to be built for testing, and the cost is high.
Disclosure of Invention
The embodiment of the application provides a SERDES interface test system and a SERDES interface test method for a serializer/deserializer, so that the cost of SERDES interface test is reduced.
In a first aspect, an embodiment of the present application provides a SERDES interface testing system for a serializer/deserializer, including:
the input device, the test conversion assembly, the cabin domain controller and the display screen are connected in sequence;
the input device is used for acquiring display attribute information from the test conversion assembly and sending an image signal to the test conversion assembly according to the display attribute information; the display attribute information comprises a data format supported by the test conversion component;
the test conversion component is used for converting the image signal sent by the input device into a serial SERDES signal supported by the cockpit area controller;
the cockpit domain controller is used for converting the serial SERDES signal into a parallel image signal and transmitting the image signal to the display screen;
the display screen is used for displaying the image signal.
In one possible implementation, the test conversion component includes: the input ends of the memory and the serializer are respectively connected with the input device, and the output end of the serializer is connected with the intelligent cockpit domain controller;
The memory is used for storing the display attribute information;
the serializer is used for converting the image signal input by the input device into the serial SERDES signal.
In one possible implementation, the cockpit domain controller comprises: a cabin domain chip and deserializer; the input end of the deserializer is connected with the output end of the serializer, the output end of the deserializer is connected with the input end of the cabin domain chip, and the output end of the cabin domain chip is connected with the display screen;
wherein the deserializer is configured to convert the serial SERDES signal into parallel image signals;
the cockpit area chip is used for analyzing the parallel image signals and transmitting the analyzed image signals to the display screen.
In one possible implementation, the test conversion component further includes: the high-definition multimedia interface HDMI decoy device comprises a high-definition multimedia interface HDMI decoy device, wherein a memory is arranged in the HDMI decoy device, one end of the HDMI decoy device is connected with the input device, and the other end of the HDMI decoy device is connected with a serializer.
In one possible implementation manner, one end of the HDMI decoy is connected with the serializer through an HDMI line.
In one possible implementation, the image signal input by the input device is a transition minimized differential signaling TMDS data stream.
In one possible implementation, the input device is connected to the memory through an integrated circuit bus I2C;
the input device is connected with the serializer through a high-definition multimedia interface (HDMI).
In one possible implementation, the memory is a powered erasable programmable read only memory EEPROM.
In one possible implementation manner, the display attribute information is extended display identification data EDID.
In a second aspect, an embodiment of the present application provides an interface testing method, which is applied to the system according to any one of the first aspects, and the method includes:
acquiring display attribute information from the test conversion assembly, and sending an image signal to the test conversion assembly according to the display attribute information; the display attribute information comprises data formats supported by the test conversion component;
converting the image signal sent by the input device into a serial SERDES signal supported by the cockpit area controller;
and converting the serial SERDES signal into a parallel image signal, and displaying the image signal.
The SERDES interface test system and method of serializer/deserializer that this application embodiment provides, this system includes: the input device, the test conversion assembly, the cabin domain controller and the display screen are connected in sequence; the input device is used for acquiring display attribute information from the test conversion assembly and sending an image signal to the test conversion assembly according to the display attribute information; the display attribute information comprises a data format supported by the test conversion component; the input device acquires display attribute information from the test conversion assembly, so that handshake with the test conversion assembly is carried out, then the input device sends an image signal to the test conversion assembly, the test conversion assembly converts the image signal into a serial SERDES signal, the cockpit domain controller converts the serial SERDES signal into the image signal, and therefore test verification of an SERDES interface of the cockpit domain controller is completed through display of the display screen.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is a schematic diagram of a prior art interface test system;
FIG. 2 is a schematic structural diagram of an embodiment of a SERDES interface test system of a serializer/deserializer provided by the present application;
FIG. 3 is a schematic structural diagram of another embodiment of a SERDES interface test system of a serializer/deserializer provided by the present application;
FIG. 4 is a schematic structural diagram of a SERDES interface test system of a serializer/deserializer provided by the present application according to another embodiment;
FIG. 5 is a schematic diagram illustrating an embodiment of a SERDES interface test system provided herein;
FIG. 6 is a schematic structural diagram of a test conversion assembly according to an embodiment of the present application;
fig. 7 is a schematic implementation flow diagram of an embodiment of a SERDES interface testing method provided in the present application;
fig. 8 is a flowchart illustrating an embodiment of a SERDES interface testing method provided in the present application.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terms "comprising" and "having," and any variations thereof, in the description and claims of this application and the drawings described herein are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
First, the nouns and application scenarios referred to in the present application will be described:
the SERDES interface is a high-speed serial interface, mainly applies differential signal transmission technology, has the characteristics of low power consumption, strong anti-interference and high transmission speed, and theoretically, the highest transmission rate of the serial interface can reach more than 10 Gbps.
The SERDES interface test system of the embodiment of the application is applied to a scene of testing an interface of a cockpit area controller. Such as the widely used SERDES interface. As shown in fig. 1, if the SERDES interface is to be tested and verified, a camera needs to be built and input to the autopilot domain controller, and then the camera is output to the cockpit domain controller through a serializer of the autopilot domain controller and then output to a screen for display. In the scheme, the camera and the automatic driving area controller need to be built for testing, and the cost is high.
In addition, in the scheme, the SERDES interface channel verification of the cockpit area controller is not decoupled from the automatic driving area controller, so that the development of the cockpit area controller is restricted.
Further, if the SERDES chip is replaced, the automatic driving area controller and the corresponding camera need to be replaced, so that the operation is complex and the cost is high.
The interface test system of the embodiment of the application stores display attribute information in the test conversion component, and the display attribute information includes: according to the data format supported by the test conversion assembly, the input device sends the image signals to the test conversion assembly according to the display attribute information, namely the input device obtains the display attribute information from the test conversion assembly to handshake with the test conversion assembly, then the input device sends the image signals to the test conversion assembly, the test conversion assembly converts the image signals into serial SERDES signals, the cockpit domain controller converts the serial SERDES signals into the image signals, and therefore the testing of the SERDES interface is completed through display screen display.
The technical solution of the present application will be described in detail with specific examples. These several specific embodiments may be combined with each other below, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 2 is a schematic structural diagram of an embodiment of a SERDES interface test system of a serializer/deserializer provided by the present application. As shown in fig. 2, the SERDES interface testing system of the serializer/deserializer provided in this embodiment includes:
the input device, the test conversion assembly, the cabin domain controller and the display screen are connected in sequence;
the input device is used for acquiring display attribute information from the test conversion component before inputting an image signal to the test conversion component and sending the image signal to the test conversion component according to the display attribute information; the display attribute information comprises data formats supported by the test conversion component;
the test conversion component is used for converting the image signal sent by the input device into a serial SERDES signal supported by the cockpit area controller;
the cockpit domain controller is used for converting the serial SERDES signal into a parallel image signal and transmitting the image signal to the display screen;
the display screen is used for displaying the image signal.
Specifically, the input device may be, for example, a personal computer PC as an input for video and/or images, for replacing the front/rear/left/right camera input of the conventional scheme.
Since the test conversion module cannot Interface directly with the input device, if the input device cannot directly send an image signal to the test conversion module through an Interface such as a High Definition Multimedia Interface (HDMI), the test conversion module is used to store display attribute information used for handshaking the input device and the test conversion module. In an embodiment, the Display attribute information is Extended Display Identification Data (EDID), which implements Data interfacing between the input device and the test conversion component.
For example, the test conversion component supports 1920 × 1080 Digital Video Interface (DVI) signal input, and then EDID information of the DVI 1920 × 1080 is written in the test conversion component, that is, a data format of the DVI 1920 × 1080 is written in the test conversion component.
For the input device, the EDID information read into the test conversion assembly is inserted into a corresponding device, and the data stream of the image signal sent by the input device is switched to a corresponding data format, so that the test conversion assembly can recognize the EDID information.
In one embodiment, the image signal input by the input device is a Transition Minimized Differential Signaling (TMDS) data stream.
And the test conversion component is used for converting the image signal input by the input device into a serial SERDES signal supported by the cockpit area controller, such as a Gigabit Video InterFace (GVIF) signal, an FPDLINK and the like, and is used for replacing an automatic driving area controller in the traditional scheme.
And the intelligent cockpit domain controller converts the serial SERDES signal into an image signal which can be identified by a display screen.
The display screen is used for displaying image signals, i.e. video and/or images input by the input device.
The EDID can be stored in a binary file format, and represents the relevant information of the equipment and the supported data format; commonly used EDID information is typically stored in a read-only memory (e.g., E2PROM) chip.
Furthermore, different SERDES interfaces support different formats of input video/image data streams, and the formats of the data streams can be virtualized into different EDIDs; the entire SERDES interface test system is available as long as the corresponding EDID is stored in the test conversion component.
The system of the embodiment comprises: the input device, the test conversion assembly, the cabin domain controller and the display screen are connected in sequence; the input device is used for acquiring display attribute information from the test conversion assembly and sending an image signal to the test conversion assembly according to the display attribute information; the display attribute information comprises a data format supported by the test conversion component; the input device acquires display attribute information from the test conversion assembly, so that handshake with the test conversion assembly is carried out, then the input device sends an image signal to the test conversion assembly, the test conversion assembly converts the image signal into a serial SERDES signal, the cockpit domain controller converts the serial SERDES signal into the image signal, and therefore test verification of an SERDES interface of the cockpit domain controller is completed through display of the display screen.
In one embodiment, as shown in fig. 3 and 5, the test conversion assembly includes: the input ends of the memory and the serializer are respectively connected with the input device, and the output end of the serializer is connected with the cabin domain controller;
the memory is used for storing display attribute information;
the serializer is used for converting the image signal input by the input device into a serial SERDES signal.
Specifically, since the serializer in the test conversion assembly cannot be directly docked with the input device, if the input device cannot directly send the image signal to the serializer through an interface such as a high-definition multimedia interface HDMI, the memory in the test conversion assembly is used for storing display attribute information, and the display attribute information is used for handshake between the input device and the test conversion assembly.
For the input device, display attribute information read into the memory of the test conversion component through the interface with the memory is stored in the form of EDID information, for example; the input device is inserted as a corresponding device, and the data stream of the HDMI of the input device is switched to a corresponding data format, so that the serializer can recognize the data.
Wherein the serializer converts the parallel image signal into a serial SERDES signal.
In one embodiment, the memory is an Electrically Erasable Programmable Read Only Memory (EEPROM).
In one embodiment, the input device is connected to the memory through an integrated circuit bus I2C; I2C is used to transport control flow.
In one embodiment, the input device is connected with the serializer through a high-definition multimedia interface (HDMI).
In the above embodiment, the input device is configured to obtain display attribute information from a memory of the test conversion assembly, and send an image signal to a serializer of the test conversion assembly according to the display attribute information; the display attribute information comprises a data format supported by the test conversion component; that is, the input device handshakes with the serializer of the test conversion module by acquiring the display attribute information from the memory of the test conversion module, thereby transmitting the image data in the format supported by the serializer.
In one embodiment, as shown in fig. 4 and 5, the cockpit area controller includes: a cockpit domain chip and deserializer; the input end of the deserializer is connected with the output end of the serializer, the output end of the deserializer is connected with the input end of the intelligent cabin domain chip, and the output end of the cabin domain chip is connected with the display screen;
Wherein the deserializer is used for converting the serial SERDES signal into a parallel image signal;
the cockpit area chip is used for analyzing the parallel image signals and transmitting the analyzed image signals to the display screen.
In particular, the deserializer converts the serial SERDES signal into parallel video/image data.
The cockpit area chip, for example, the cockpit SOC, analyzes the image signal transmitted from the deserializer and outputs the image signal to the display.
The interface between the deserializer and the serializer is a SERDES interface.
As shown in fig. 5, the input device obtains display attribute information from the memory through I2C, transmits a TMDS data stream to the serializer through HDMI according to the display attribute information, the serializer converts the data stream into a serial SERDES signal and transmits the serial SERDES signal to the deserializer, the deserializer converts the serial SERDES signal into a parallel image signal and transmits the parallel image signal to the cockpit SOC and the cockpit SOC, the parallel image signal transmitted by the deserializer is analyzed, and the parallel image signal is output to the display screen which displays the image signal.
In the above embodiment, for different SERDES interfaces, only the display attribute information in the test conversion component needs to be changed, where the display attribute information includes a data format supported by the SERDES interface, and the serializer deserializer chip is updated, so that decoupling of the cockpit domain controller from other domain controllers is achieved.
In one embodiment, as shown in fig. 6, the test conversion assembly further comprises: the high-definition multimedia interface HDMI decoy device comprises a high-definition multimedia interface HDMI decoy device, wherein a memory is arranged in the HDMI decoy device, one end of the HDMI decoy device is connected with the input device, and the other end of the HDMI decoy device is connected with a serializer.
Specifically, the test conversion assembly may include: HDMI spoofer, serializer;
the memory is integrated on the HDMI decoy and used for storing EDID information in a format supported by the serializer.
The public head end of the HDMI decoy is directly inserted into an HDMI interface of the input device.
The female head end of the HDMI decoy is connected with the circuit board of the serializer through an HDMI wire harness.
In the above embodiment, since the test conversion component cannot be directly interfaced with the input device, the input device cannot directly send an image signal to the test conversion component through a High Definition Multimedia Interface (HDMI), the input device is linked with a serializer of the test conversion component through an HDMI decoy, a memory of the test conversion component is used for storing display attribute information, and the display attribute information is used for handshake between the input device and the test conversion component, which is simple in implementation and low in cost.
In one embodiment, as shown in fig. 7, the overall flow of the SERDES interface test is as follows:
step 1-1, E2PROM of the HDMI decoy burns EDID information of data format supported by the serializer;
wherein, the step 1-1 is a preparation process before testing.
Step 2-1, inserting the HDMI decoy device into a PC;
step 2-2, the HDMI wire harness is connected with the HDMI decoy and the serializer circuit board;
2-3, connecting the serializer circuit board and the cockpit area controller by an SERDES wire harness;
the step 2-1 to the step 2-3 are processes of building a test environment;
step 3-1, electrifying a test environment;
3-2, performing display setting on the PC terminal, namely adding a display device after the HDMI decoy is inserted, and setting 'expanding the displays';
and 3-3, synchronously displaying the test video/image of the PC by the display screen.
The step 3-1 to the step 3-3 are test procedures.
Compared with a camera and an automatic driving area controller, the price of the SERDES interface test system is greatly reduced, and the environment is more convenient to build; the decoupling of an automatic driving domain controller and an intelligent cabin domain controller can be realized; the authentication of the SERDES interface can be done by replacing the image data in the input device. For different SERDES interface chips and different automatic driving domain controllers, only the display attribute information (representing the data formats supported by different SERDES interfaces) stored in the test conversion component needs to be changed, and the serializer deserializer chip needs to be updated, so that the modular test system is realized.
Fig. 8 is a schematic flowchart of an embodiment of an interface testing method provided in the present application. As shown in fig. 8, the method provided in this embodiment is applied to the SERDES interface test system described in any of the foregoing embodiments, and the method includes:
and 103, converting the serial SERDES signal into a parallel image signal, and displaying the image signal.
Specifically, the test conversion assembly is used for storing display attribute information which is used for holding the input device and the test conversion assembly because the test conversion assembly cannot be directly butted with the input device.
For example, the test conversion component supports 1920 × 1080 Digital Video Interface (DVI) signal input, and then EDID information of the DVI 1920 × 1080 is written in the test conversion component, that is, a data format of the DVI 1920 × 1080 is written in the test conversion component.
For the input device, the EDID information in the test conversion component is read, the input device is a corresponding device, and the data stream of the image signal sent by the input device is switched to a corresponding data format, so that the test conversion component can recognize the EDID information, and the image signal is sent to the test conversion component.
Further converting the image signal sent by the input device into a serial SERDES signal supported by the cockpit domain controller through a test conversion component; and converting the serial SERDES signals into parallel image signals through the cockpit domain controller, and displaying the image signals through the display screen, thereby completing the test verification of the SERDES interface of the cockpit domain controller.
In a possible implementation manner, the converting the image signal sent by the input device into the serial SERDES signal supported by the cockpit domain controller includes:
and converting the image signal input by the input device into the serial SERDES signal through a serializer.
In one possible implementation, the converting the serial SERDES signal into a parallel image signal includes:
converting the serial SERDES signal into a parallel image signal by the deserializer;
And analyzing the parallel image signals through the cockpit domain chip, and transmitting the analyzed image signals to the display screen.
The method of this embodiment, which has the similar implementation principle and technical effect to those of the above-mentioned test system embodiment, is not repeated herein.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A serializer/deserializer SERDES interface test system, comprising:
The input device, the test conversion assembly, the cabin domain controller and the display screen are connected in sequence;
the input device is used for acquiring display attribute information from the test conversion assembly and sending an image signal to the test conversion assembly according to the display attribute information; the display attribute information comprises a data format supported by the test conversion component;
the test conversion component is used for converting the image signal sent by the input device into a serial SERDES signal supported by the cockpit area controller;
the cockpit domain controller is used for converting the serial SERDES signal into a parallel image signal and transmitting the image signal to the display screen;
the display screen is used for displaying the image signal.
2. The system of claim 1, wherein the test conversion component comprises: the input ends of the memory and the serializer are respectively connected with the input device, and the output end of the serializer is connected with the intelligent cockpit domain controller;
the memory is used for storing the display attribute information;
the serializer is used for converting the image signal input by the input device into the serial SERDES signal.
3. The system of claim 2, wherein the cockpit domain controller comprises: a cabin domain chip and deserializer; the input end of the deserializer is connected with the output end of the serializer, the output end of the deserializer is connected with the input end of the cabin domain chip, and the output end of the cabin domain chip is connected with the display screen;
wherein the deserializer is used for converting the serial SERDES signal into a parallel image signal;
the cockpit area chip is used for analyzing the parallel image signals and transmitting the analyzed image signals to the display screen.
4. The system of claim 2 or 3, wherein the test conversion assembly further comprises: the high-definition multimedia interface HDMI decoy device comprises a high-definition multimedia interface HDMI decoy device, wherein a memory is arranged in the HDMI decoy device, one end of the HDMI decoy device is connected with the input device, and the other end of the HDMI decoy device is connected with a serializer.
5. The system of any of claims 1-3, wherein one end of the HDMI decoy is connected to the serializer via an HDMI cable.
6. The system according to any one of claims 1 to 3,
The image signal input by the input device is a TMDS data stream of minimized transmission differential signals.
7. The system according to any one of claims 1 to 3,
the input device is connected with the memory through an integrated circuit bus I2C;
the input device is connected with the serializer through a high-definition multimedia interface (HDMI).
8. The system according to any one of claims 2-3,
the memory is an EEPROM.
9. The system according to any one of claims 1 to 3,
the display attribute information is extended display identification data EDID.
10. An interface testing method applied to the system according to any one of claims 1 to 9, the method comprising:
acquiring display attribute information from the test conversion assembly, and sending an image signal to the test conversion assembly according to the display attribute information; the display attribute information comprises a data format supported by the test conversion component;
converting the image signal sent by the input device into a serial SERDES signal supported by the cockpit area controller;
and converting the serial SERDES signal into a parallel image signal, and displaying the image signal.
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