CN115941566A - Circuit testing method, testing board and testing system - Google Patents
Circuit testing method, testing board and testing system Download PDFInfo
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Abstract
The application provides a circuit testing method, a testing board and a testing system, wherein the method comprises the following steps: the method comprises the steps of sending a first digital audio signal to an automobile audio bus circuit, controlling the automobile audio bus circuit to convert the first digital audio signal into an automobile audio bus signal, controlling the automobile audio bus circuit to transmit the automobile audio bus signal to a test board, obtaining a second digital audio signal, and obtaining a test result according to the first digital audio signal and the second digital audio signal. According to the technical scheme, the test board is used for converting the automobile audio bus signal output by the automobile audio bus circuit to obtain the digital audio signal, the digital audio signal is looped back to the system on chip, and the system on chip compares the sent digital audio signal with the looped received digital audio signal to determine whether the automobile audio bus circuit is abnormal or not, so that the test cost of the automobile audio bus circuit is reduced.
Description
Technical Field
The application relates to the technical field of automobile audio buses, in particular to a circuit testing method, a testing board and a testing system.
Background
An automobile Audio Bus (A2B) belongs to an Audio Bus, and an A2B Bus circuit is used for connecting Audio equipment in a vehicle, such as a microphone, a power amplifier, a multimedia host and the like. The A2B bus performs span-wise bidirectional transmission of multiple paths of audio data, control signals, clocks, and power using a pair of differential lines.
In the prior art, when testing an A2B bus circuit, a peripheral device supporting an A2B bus is used, sound is directly played through a power amplifier of the peripheral device, and a tester determines whether the A2B bus circuit is abnormal according to the played sound.
However, in the testing method of the prior art, in order to obtain an accurate testing result and avoid testing errors caused by the peripheral devices, the testing personnel often use the peripheral devices with high cost to play sound, and obtain an accurate testing result by listening whether the sound played by the peripheral devices is abnormal, so that the testing cost of the A2B bus circuit is increased by using the peripheral devices.
Disclosure of Invention
The application provides a circuit testing method, a testing board and a testing system, which are used for solving the problem that the existing automobile audio bus circuit is high in testing cost.
In a first aspect, an embodiment of the present application provides a circuit testing method, which is applied to a system on chip of an audio playing device, and the method includes:
sending a first digital audio signal to an automobile audio bus circuit, and controlling the automobile audio bus circuit to convert the first digital audio signal into an automobile audio bus signal;
controlling the automobile audio bus circuit to transmit the automobile audio bus signal to a test board, wherein the test board is used for converting the automobile audio bus signal into a second digital audio signal and looping the second digital audio signal back to the automobile audio bus circuit;
and acquiring the second digital audio signal, and acquiring a test result according to the first digital audio signal and the second digital audio signal, wherein the test result is used for indicating whether the automobile audio bus circuit is abnormal or not.
In one possible design of the first aspect, the audio playing apparatus includes a digital processor, the digital processor is connected to the car audio bus circuit, and the sending the first digital audio signal to the car audio bus circuit includes:
configuring an audio channel of the digital processor according to preset configuration information;
and sending the first digital audio signal to the digital processor, and controlling the digital processor to transmit the first digital audio signal to the automobile audio bus circuit by using a first audio channel.
In another possible design of the first aspect, the acquiring the second digital audio signal includes:
controlling the car audio bus circuit to transmit a second digital audio signal of the test board to the digital processor;
controlling the digital processor to loop back the second digital audio signal using the first audio channel.
In yet another possible design of the first aspect, the audio playback apparatus further includes a sound playback component, the sound playback component is connected to the digital processor, and after the controlling the car audio bus circuit to transmit the second digital audio signal of the test board to the digital processor, the audio playback apparatus further includes:
and controlling the digital processor to transmit the second digital audio signal to the sound playing component by using a second audio channel.
In yet another possible design of the first aspect, after controlling the car audio bus circuit to transmit the second digital audio signal of the test board to the digital processor, the method further includes:
and controlling the digital processor to perform sound effect processing on the second digital audio signal by using a preset sound effect processing algorithm to obtain the second digital audio signal after the sound effect processing.
In another possible design of the first aspect, the obtaining test results according to the first digital audio signal and the second digital audio signal includes:
acquiring audio data of the first digital audio signal and audio data of the second digital audio signal;
and comparing the audio data of the first digital audio signal with the audio data of the second digital signal to obtain the test result.
In another possible design of the first aspect, before the controlling the car audio bus circuit to transmit the car audio bus signal to the test board, the method further includes:
detecting whether the automobile audio bus circuit is connected with the test board or not;
and if the automobile audio bus circuit is connected with the test board, outputting a first control signal to the automobile audio bus circuit, wherein the first control signal is used for configuring the data format of the test board.
In a second aspect, an embodiment of the present application provides a test board, where the test board is used to connect a car audio bus circuit;
the test board is used for converting the automobile audio bus signals transmitted by the automobile audio bus circuit into digital audio signals and looping the digital audio signals back to the automobile audio bus circuit.
In a third aspect, an embodiment of the present application provides a test system, including: the system on chip is connected with the test board through the automobile audio bus circuit;
the automobile audio bus circuit is used for receiving a first digital audio signal sent by the system on chip, converting the first digital audio signal into an automobile audio bus signal and sending the automobile audio bus signal to the test board;
the test board is used for converting the automobile audio bus signal into a second digital audio signal and looping back the second digital audio signal to the automobile audio bus circuit;
the system on chip is used for obtaining the second digital audio signal and obtaining a test result according to the first digital audio signal and the second digital audio signal, wherein the test result is used for indicating whether the automobile audio bus circuit is abnormal or not.
In one possible design of the third aspect, the test system further includes: and the digital processor is connected with the system on chip and the automobile audio bus circuit.
In another possible design of the third aspect, the test system further includes: the sound playing component is connected with the digital processor;
the sound playing component is used for acquiring the second digital audio signal and playing sound according to the second digital audio signal.
In a further possible design of the third aspect, the sound playing component includes a power amplifier and a speaker, the power amplifier is connected to the digital processor, and the speaker is connected to the power amplifier.
According to the circuit testing method, the testing board and the testing system, the testing board is used for converting the automobile audio bus signals output by the automobile audio bus circuit to obtain the digital audio signals, the digital audio signals are looped back to the system on chip, the system on chip compares the sent digital audio signals with the digital audio signals received in the looped mode to determine whether the automobile audio bus circuit is abnormal or not, the fact that a tester uses a peripheral to be connected with the A2B circuit is avoided, the A2B circuit is tested through sounds played by the peripheral, and the testing cost of the automobile audio bus circuit is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application;
fig. 1 is a schematic view of a scenario of a circuit testing method according to an embodiment of the present disclosure;
FIG. 2 is a schematic flowchart of a circuit testing method according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a first test system according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a second embodiment of a test system provided in the present application;
with the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms referred to in this application are explained first:
the system on chip:
a System-on-a-chip (SOC) refers to a technology for grouping all or part of necessary electronic circuits by integrating a complete System on a single chip, and the System generally includes a central processing unit, a memory, peripheral circuits, and the like;
car audio frequency bus circuit:
the automobile Audio Bus (A2B) is an Audio Bus for bidirectionally transmitting multiple Audio data by using a pair of 49.152M differential lines, the A2B supports cascading of multiple nodes, can directly hang down the MIC of the PDM, and simultaneously supports Audio data input and output of an Inter-IC Sound (I2S) Bus built in an integrated circuit, and the automobile Audio Bus circuit specifically comprises an A2B chip, a filter circuit, a power supply circuit, an A2B Bus and the like.
Fig. 1 is a scene schematic diagram of a circuit testing method provided by an embodiment of the present application, and as shown in fig. 1, an application scene of the embodiment is an audio playing device, where the audio playing device includes an SOC11, a Digital Signal Processor (DSP) 12, an A2B circuit 13, and the like, and in an actual application Process, the A2B circuit 13 may hang a microphone and the like, and support input and output of audio data of a Digital audio Signal, and may realize input and output of the audio data through an integrated circuit built-in audio bus, and before the audio playing device leaves a factory or is used, the A2B circuit needs to perform a detection Process to determine whether there is an abnormality.
The prior art detects an A2B circuit, which mainly connects an A2B bus to an A2B-supporting peripheral device, converts a digital audio signal of SOC into an automobile audio bus signal by the A2B circuit, transmits the signal to the peripheral device through an automobile audio bus, broadcasts the sound through a power amplifier and a speaker of the peripheral device, and a tester listens to the broadcasted sound and detects whether the sound has noise or not to determine whether the A2B circuit is abnormal. In the manner adopted by the prior art, the used peripheral circuits are very complex, specifically include an A2B module circuit, a power amplifier circuit, a control circuit and the like, and the cost of the peripheral capable of supporting A2B is very high, so that the test cost of the A2B circuit is increased.
In view of the foregoing problems, the embodiments of the present application provide a circuit testing method, a testing board and a testing system, and the main concepts are as follows: the SOC utilizes the comparison function of the SOC of the audio playing equipment, the SOC sends a first digital audio signal to an A2B circuit through an I2S bus, the A2B circuit converts the first digital audio signal into an automobile audio bus signal and then transmits the automobile audio bus signal to a test board, the automobile audio bus signal is converted back into a second digital audio signal through the test board and then loops back to the SOC, the SOC utilizes the comparison function to complete the consistency comparison of the first digital audio signal and the second digital audio signal and determine whether the A2B circuit is abnormal or not, a peripheral with higher use cost is avoided, meanwhile, a tester does not need to listen to the sound played by the peripheral to carry out subjective detection judgment, and the detection accuracy of the A2B circuit is improved.
The technical solution of the present application will be described in detail below with reference to specific examples. It should be noted that the following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.
Fig. 2 is a schematic flowchart of a circuit testing method provided in an embodiment of the present application, where the circuit testing method is applied to an SOC of an audio playing device, and as shown in fig. 2, the method specifically includes the following steps:
s201, sending the first digital audio signal to an automobile audio bus circuit, and controlling the automobile audio bus circuit to convert the first digital audio signal into an automobile audio bus signal.
For example, the SOC may be connected to the A2B circuit via the DSP, and the SOC may send the first digital audio signal to the DSP via the I2S bus, and the DSP forwards the first digital audio signal to the A2B circuit via the first I2S bus.
In this embodiment, the SOC may further send a control signal to the A2B Circuit through an Inter-Integrated Circuit (I2C), so as to configure the A2B Circuit, and the A2B Circuit completes conversion of the first digital audio signal, that is, converts the first digital audio signal into the car audio bus signal according to the configuration information of the SOC.
S202, controlling the automobile audio bus circuit to transmit the automobile audio bus signal to the test board.
The test board is used for converting the automobile audio bus signal into a second digital audio signal and looping the second digital audio signal back to the automobile audio bus circuit.
In this embodiment, the test board includes an A2B chip, a loopback circuit, and the like, and for example, the test board may convert the car audio bus into a second digital audio signal through the A2B chip, and then loop back the second digital audio signal to the A2B circuit through the loopback circuit.
Illustratively, the test board is connected with a car audio bus in the A2B circuit, and the A2B circuit transmits a car audio bus signal to the test board through the car audio bus, and the test board can also loop a second digital audio signal back to the A2B circuit through the car audio bus.
S203, acquiring a second digital audio signal, and acquiring a test result according to the first digital audio signal and the second digital audio signal.
And the test result is used for indicating whether the automobile audio bus circuit is abnormal or not. For example, the test result may be obtained according to a comparison result between the first digital audio signal and the second digital audio signal, and when the comparison between the first digital audio signal and the second digital audio signal is inconsistent, the test result indicates that the automobile audio bus circuit is abnormal, and when the comparison between the first digital audio signal and the second digital audio signal is consistent, the test result indicates that the automobile audio bus circuit is not abnormal.
In the present embodiment, the SOC has a comparison function that can determine whether there is an abnormality in the A2B circuit in the car audio device by comparing the transmitted and received signals in accordance.
For example, after obtaining the second digital audio signal looped back by the test board, the A2B circuit may forward the second digital audio signal to the DSP through the I2S bus, and then the DSP loops the second digital audio signal back to the SOC through the first I2S bus.
The embodiment of the application converts the automobile audio bus signal output by the A2B circuit by using the test board to obtain the digital audio signal, and the digital audio signal is looped back to the SOC, the SOC compares the digital audio signal sent out with the digital audio signal received by the loop, whether the A2B circuit is abnormal is determined, the condition that a tester uses a peripheral and the A2B circuit is avoided, the A2B circuit is tested by sound played by the peripheral, the test cost of the automobile audio bus circuit is reduced, meanwhile, whether the audio signal goes wrong in the transmission process is also detected, and the test efficiency is improved.
Optionally, in some embodiments, if the audio playing device includes a digital processor, and the SOC is connected to the car audio bus circuit through the digital processor, the step S201 of sending the first digital audio signal to the car audio bus circuit may be implemented by the following steps:
configuring an audio channel of the digital processor according to preset configuration information;
and sending the first digital audio signal to a digital processor, and controlling the digital processor to transmit the first digital audio signal to an automobile audio bus circuit by using a first audio channel.
Specifically, the SOC may send the I2C bus to send a control signal to the digital processor, and configure the digital processor through preset configuration information, for example, the SOC may configure an audio channel of the digital processor, and the preset configuration information may be determined by a tester. The first audio channel may be the first I2S bus, and the DSP may include a plurality of audio channels, each of which is connected to an electrical device in the audio playing device.
For example, the SOC may further send the control signal to the digital processor through the I2C bus, and configure a sound effect processing algorithm of the digital processor, where the sound effect processing algorithm is used for the digital processor to perform sound effect processing on the audio signal.
In this embodiment, the digital processor includes a plurality of audio channels, and for example, the digital processor may include a first audio channel and a second audio channel, where the first audio channel may be an input channel of an audio signal, and the second audio channel may be an output channel of the audio signal, and the digital audio signal is converted into sound through the output channel of the audio signal to be played.
On the basis of the foregoing embodiments, in some embodiments, the "acquiring the second digital audio signal" in the step S203 may specifically be implemented by:
controlling the automobile audio bus circuit to transmit the second digital audio signal of the test board to the digital processor;
and controlling the digital processor to loop back the second digital audio signal by using the first audio channel.
Specifically, the SOC may send a control signal to the digital processor and the car audio bus via the I2C bus, and control the digital processor to loop the second digital audio signal back to the SOC via the first audio channel (i.e., the first I2S bus), so that the SOC may compare the first digital audio signal with the second digital audio signal.
Optionally, on the basis of the foregoing embodiments, in some embodiments, if the audio playing device further includes a sound playing component, and the sound playing component is connected to the digital processor, the circuit testing method further includes the following steps:
and controlling the digital processor to transmit the second digital audio signal to the sound playing component by using the second audio channel.
In this embodiment, the second audio channel is different from the first audio channel, for example, the second audio channel may be an output channel, the sound playing component may include a power amplifier and a speaker, and the digital processor outputs the second digital audio signal to the sound playing component through the I2S bus, so that the sound playing component can play sound. Wherein the second digital audio signal may be power amplified by a power amplifier and output sound by a speaker.
This application embodiment can utilize the audio data broadcast sound of second digital audio signal through setting up the sound broadcast subassembly, and the tester can test the A2B circuit according to the sound of broadcast, when the sound of broadcasting exists unusually, then shows that the A2B circuit probably exists unusually, improves the test accuracy.
On the basis of the above embodiment, the circuit testing method further includes the following steps:
and controlling the digital processor to perform sound effect processing on the second digital audio signal by using a preset sound effect processing algorithm to obtain the second digital audio signal after the sound effect processing.
In this embodiment, the preset sound effect processing algorithm may configure the digital processor through the SOC, for example, the preset sound effect processing algorithm includes sound effect processing algorithms such as dolby sound effect and stereo surround, and the SOC may output configuration information to the digital processor through the I2C bus, and configure the sound effect processing algorithm of the digital processor.
After the digital processor performs sound effect processing on the second digital audio signal, the sound playing component can acquire the second digital audio signal after the sound effect processing, and perform sound playing according to audio data in the second digital audio signal.
The embodiment of the application carries out sound effect processing to the second digital audio signal through utilizing the digital processor, outputs to the sound playing component and carries out sound playing, can make things convenient for the tester to utilize the sound of broadcast to confirm whether the A2B circuit exists unusually, increases the means of A2B circuit anomaly test, improves the test accuracy.
In some embodiments, the step S203 of obtaining the test result according to the first digital audio signal and the second digital audio signal may be specifically implemented by the following steps:
acquiring audio data of a first digital audio signal and audio data of a second digital audio signal;
and comparing the audio data of the first digital audio signal with the audio data of the second digital signal to obtain a test result.
In this embodiment, the first digital audio signal may be used as a sending signal of the SOC, the second digital audio signal may be used as a receiving signal of the SOC, and the SOC may determine whether the A2B circuit is abnormal by comparing audio data in the sending and receiving signals, so as to obtain a test result of the A2B circuit.
It can be understood that after the first digital audio signal sent by the SOC is forwarded to the A2B circuit through the digital processor, the A2B circuit converts the first digital audio signal into a car audio bus signal, and transmits the car audio bus signal to the test board through the car audio bus, and the test board converts the car audio bus signal into a second digital audio signal, and loops the second digital audio signal back to the SOC, wherein if the A2B circuit is not abnormal, the audio data in the first digital audio signal should be matched with the audio data in the second digital audio signal.
In some embodiments, the above circuit testing method further comprises the steps of:
detecting whether the automobile audio bus circuit is connected with a test board or not;
if the car audio bus circuit is connected with the test board, a first control signal is output to the car audio bus circuit.
The first control signal is used for configuring the data format of the test board.
In this embodiment, when the A2B circuit is connected to a test board, the A2B circuit may transmit the first control signal to the test board, the test board includes an A2B chip, and when the test board is connected to the A2B circuit through the car audio bus, the SOC may configure a data format of the A2B chip, where the data format may be, for example, a data format of audio data in the second audio signal, specifically, a wav format, an mp3 format, and the like. For example, the SOC may further output a second control signal to configure the operation mode of the A2B chip in the test board.
Optionally, the embodiment of the present application provides a test board, where the test board is used to connect an A2B circuit, and when the test board is connected to the A2B circuit, the test board may convert an automobile audio bus signal transmitted by the A2B circuit into a digital audio signal, and loop back to the A2B circuit.
Illustratively, in some embodiments, the test board comprises an A2B chip and a loopback circuit, wherein the A2B chip is used for converting the car audio bus signal transmitted by the A2B circuit into a digital audio signal, and the loopback circuit is used for looping the digital audio signal back to the A2B circuit.
Optionally, an embodiment of the present application provides a test system, where the test system includes an SOC, an A2B circuit, and a test board, and the SOC is connected to the test board through the A2B circuit.
The A2B circuit is used for receiving a first digital audio signal sent by the SOC, converting the first digital audio signal into an automobile audio bus signal and sending the automobile audio bus signal to the test board. The test board is used for converting the automobile audio bus signal into a second digital audio signal and looping back to the A2B circuit. The SOC is used for obtaining a second digital audio signal and obtaining a test result according to the first digital audio signal and the second digital audio signal.
Wherein the test result is used for indicating whether the A2B circuit has an abnormality.
Specifically, the SOC may send the first digital audio signal to the A2B circuit through the I2S bus, and the A2B circuit may also transmit the looped-back second digital audio signal to the SOC through the I2S bus.
For example, in this embodiment, the A2B circuit may include an A2B chip, a filter circuit, a power supply circuit, and a car audio bus, where the car audio bus is used to connect to the test board and send the first digital audio signal to the test board through the car audio bus.
For example, the SOC may acquire audio data of the first digital audio signal and audio data of the second digital audio signal, and determine whether there is an abnormality in the A2B circuit by comparing whether there is a difference between the audio data of the first digital audio signal and the audio data of the second digital audio signal.
For example, on the basis of the above embodiments, fig. 3 is a schematic structural diagram of a first embodiment of the test system provided in the embodiments of the present application, and as shown in fig. 3, the test system further includes a DSP32, the DSP32 is connected to the SOC31 and the A2B circuit 33, respectively, and the A2B circuit 33 is connected to the test board 34.
The DSP32 is used for selecting an audio channel and processing sound effects.
In the present embodiment, when the SOC31 transmits the first digital audio signal to the DSP32 through the I2S bus, the DSP32 forwards the first digital audio signal to the A2B circuit 33 through the I2S bus.
For example, on the basis of the above embodiments, fig. 4 is a schematic structural diagram of a second embodiment of the test system provided in the embodiments of the present application, and as shown in fig. 4, the test system further includes a sound playing component 44, where the sound playing component 44 is connected to the DSP42, and the DSP42 is connected to the SOC 41.
The sound playing component 44 is configured to obtain the second digital audio signal forwarded by the A2B circuit 43 to the DSP42, convert the second digital audio signal into a sound signal, and play sound.
The A2B circuit 43 is also connected to a test board 45.
Illustratively, based on the above embodiments, in some embodiments, the sound playing component 44 includes a power amplifier and a speaker, the power amplifier is connected to the digital processor, and the speaker is connected to the power amplifier.
The power amplifier may perform power amplification on the second digital audio signal, and the speaker may convert the second digital audio signal after the power amplification into sound.
In this embodiment, the SOC may further configure functional parameters such as operating modes and data formats of the DSP, the power amplifier, the A2B circuit and the A2B chip on the test board through the I2C bus, and control storage and playing of audio data.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. The first resistance and the second resistance are both resistances, but they are not the same resistance.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
In this application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship; in the formula, the character "/" indicates that the preceding and following related objects are in a relationship of "division". "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.
It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for convenience of description and distinction and are not intended to limit the scope of the embodiments of the present application. In the embodiment of the present application, the sequence numbers of the above-mentioned processes do not mean the sequence of execution, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiment of the present application.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (12)
1. A circuit testing method is applied to a system on chip of an audio playing device, and comprises the following steps:
sending a first digital audio signal to an automobile audio bus circuit, and controlling the automobile audio bus circuit to convert the first digital audio signal into an automobile audio bus signal;
controlling the automobile audio bus circuit to transmit the automobile audio bus signal to a test board, wherein the test board is used for converting the automobile audio bus signal into a second digital audio signal and looping the second digital audio signal back to the automobile audio bus circuit;
and acquiring the second digital audio signal, and acquiring a test result according to the first digital audio signal and the second digital audio signal, wherein the test result is used for indicating whether the automobile audio bus circuit is abnormal or not.
2. The method of claim 1, wherein the audio playback device includes a digital processor coupled to the car audio bus circuit, and wherein sending a first digital audio signal to the car audio bus circuit comprises:
configuring an audio channel of the digital processor according to preset configuration information;
and sending the first digital audio signal to the digital processor, and controlling the digital processor to transmit the first digital audio signal to the automobile audio bus circuit by using a first audio channel.
3. The method of claim 2, wherein said obtaining the second digital audio signal comprises:
controlling the car audio bus circuit to transmit a second digital audio signal of the test board to the digital processor;
controlling the digital processor to loop back the second digital audio signal using the first audio channel.
4. The method of claim 3, wherein the audio playback device further comprises a sound playback component, the sound playback component being connected to the digital processor, and wherein after controlling the car audio bus circuit to transmit the second digital audio signal of the test board to the digital processor, further comprising:
and controlling the digital processor to transmit the second digital audio signal to the sound playing component by using a second audio channel.
5. The method of claim 4, wherein after said controlling said car audio bus circuit to transmit a second digital audio signal of said test board to said digital processor, further comprising:
and controlling the digital processor to perform sound effect processing on the second digital audio signal by using a preset sound effect processing algorithm to obtain the second digital audio signal after the sound effect processing.
6. The method of claim 1, wherein obtaining test results from the first digital audio signal and the second digital audio signal comprises:
acquiring audio data of the first digital audio signal and audio data of the second digital audio signal;
and comparing the audio data of the first digital audio signal with the audio data of the second digital signal to obtain the test result.
7. The method of claim 1, wherein before controlling the car audio bus circuit to transmit the car audio bus signal to a test board, the method further comprises:
detecting whether the automobile audio bus circuit is connected with the test board or not;
and if the automobile audio bus circuit is connected with the test board, outputting a first control signal to the automobile audio bus circuit, wherein the first control signal is used for configuring a data format of the test board.
8. A test board, wherein the test board is used for connecting with a car audio bus circuit;
the test board is used for converting the automobile audio bus signals transmitted by the automobile audio bus circuit into digital audio signals and looping the digital audio signals back to the automobile audio bus circuit.
9. A test system, comprising: the system on chip is connected with the test board through the automobile audio bus circuit;
the automobile audio bus circuit is used for receiving a first digital audio signal sent by the system on chip, converting the first digital audio signal into an automobile audio bus signal and sending the automobile audio bus signal to the test board;
the test board is used for converting the automobile audio bus signal into a second digital audio signal and looping back the second digital audio signal to the automobile audio bus circuit;
the system on chip is used for obtaining the second digital audio signal and obtaining a test result according to the first digital audio signal and the second digital audio signal, wherein the test result is used for indicating whether the automobile audio bus circuit is abnormal or not.
10. The system of claim 9, wherein the test system further comprises: and the digital processor is connected with the system on chip and the automobile audio bus circuit.
11. The system of claim 10, wherein the test system further comprises: the sound playing component is connected with the digital processor;
the sound playing component is used for acquiring the second digital audio signal and playing sound according to the second digital audio signal.
12. The system of claim 11, wherein the sound playing assembly comprises a power amplifier and a speaker, the power amplifier being coupled to the digital processor, the speaker being coupled to the power amplifier.
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