CN104243968A - Testing device and high-definition digital multimedia interface function testing method - Google Patents

Abstract

The invention provides a testing device and a high-definition digital multimedia interface function testing method. The testing device is connected to a product to be tested through an HDMI bus. The HDMI bus comprises a CEC single line, a first end and a second end, wherein the first end is connected with the product to be tested. The testing device comprises a switchover board and a processor. The switchover board comprises a first switchover port and a switchover input port, wherein the switchover input port is connected with the second end. The switchover input port comprises a CEC pin. The first switchover port is connected with the CEC pin, so that the first switchover port is connected with the CEC single line in the HDMI bus through the CEC pin. The first switchover port is also connected with the processor and leads the CEC single line out to the processor. The processor is used for detecting level signals on the CEC single line before and after the product to be tested receives a CEC instruction, wherein when the processor detects that the level signals are alternate high level signals and low level signals, it is indicated that the product to be tested has the CEC function. The testing method is simple and saves manpower.

Description

Testing apparatus and High-definition Digital Multimedia Interface function test method

Technical field

The present invention relates to signal testing field, particularly relate to the signal testing technology of High-definition Digital Multimedia Interface.

Background technology

Nowadays, HDMI(High-definition Digital Multimedia Interface, High-definition Digital Multimedia Interface) be one of interfacing being widely used in connection Digital Television.CEC(consumer electronics device controls, Consumer Electronic Control) function is an importance of HDMI technology, the multiple electronic equipments allowing user simultaneously can control to be connected by HDMI by a remote controller perform same operation.

This class of electronic devices all needs when dispatching from the factory to test its CEC performance.Traditional test process needs electronic equipment to be measured to be connected with another external equipment with CEC function by HDMI.If connected external equipment also can be controlled while controlling electronic equipment to be measured by a remote controller perform same operation, then show that electronic equipment CEC function to be measured is normal.But whether the external equipment that above-mentioned method of testing needs operator's manual confirmation to connect can obtain correct control, be unfavorable for improving testing efficiency.

Summary of the invention

In view of above content, be necessary to provide a kind of testing apparatus testing High-definition Digital Multimedia Interface function, the automatic test of CEC function can be realized, thus overcome the above problems.

The invention provides a kind of testing apparatus, a product to be measured is connected to by a HDMI bus, this HDMI bus comprises a CEC single line, one first end and one second end, the first end of this HDMI bus is connected with product to be measured, this testing apparatus comprises a keyset and a processor, this keyset comprises one first converting interface and a switching input port, this switching input port is connected with the second end of this HDMI bus, this switching input port comprises a CEC pin, this first converting interface is connected with this CEC pin, thus be connected with the CEC single line in this HDMI bus by this CEC pin, this first converting interface is also connected with this processor, and CEC single line is led to this processor, this processor receives level signal on the described CEC single line in front and back of a CEC instruction for detecting this product to be measured, wherein, when to detect this level signal be high and low level signal alternately to this processor, shows that this product to be measured has CEC function.

The present invention also provides a kind of High-definition Digital Multimedia Interface function test method, run in a testing apparatus, this testing apparatus is connected to a product to be measured by a HDMI bus, this HDMI bus comprises a CEC single line, a first end and one second end, the first end of this HDMI bus is connected with product to be measured, this testing apparatus comprises a keyset and a processor, and this keyset comprises one first converting interface and a switching input port, and the method comprises:

A CEC instruction is sent to this product to be measured;

This processor is detected this product to be measured and is received level signal before and after this CEC instruction on described CEC single line, wherein, the switching input port of this keyset is connected with the second end of this HDMI bus, this switching input port comprises a CEC pin, this first converting interface is connected with this CEC pin, thus be connected with the CEC single line in this HDMI bus by this CEC pin, this first converting interface is also connected with this processor, and this CEC single line is led to this processor; And

When detecting this level signal and being the high and low level signal replaced, this processor judges that this product to be measured has CEC function.

Compared with prior art, the present invention utilizes a processor connecting product to be measured by CEC single line to detect product to be measured and is receiving the level signal before and after CEC instruction on CEC single line, thus judging whether this product to be measured has CEC function, method of testing is simple and save manpower.

Accompanying drawing explanation

Fig. 1 is the functional block diagram of the testing apparatus in the present invention one better embodiment.

Fig. 2 is the functional block diagram of the testing apparatus in another execution mode of the present invention.

Fig. 3 is the flow chart of the High-definition Digital Multimedia Interface function test method in the present invention one better embodiment.

Main element symbol description

Testing apparatus	1
		HDMI bus	2
Product to be measured	3
		Display unit	4
Data processing unit	5
		First end	21
Second end	22
		Data wire	23
CEC single line	24
		Keyset	100
First converting interface	101
		Second converting interface	102
Switching input port	103
		Processor	200
Alarm unit	300
		CEC pin	1031
Data pin	1032

Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.

Embodiment

Fig. 1 is the functional block diagram of testing apparatus 1 of the present invention.This testing apparatus 1 is connected to a product 3 to be measured by a HDMI bus 2, whether performs corresponding operation, thus judge whether this product 3 to be measured has CEC function for test when this product 3 to be measured receives a CEC instruction.Wherein, this product 3 to be measured is connected with a data processing unit 5.In the present embodiment, this product 3 to be measured is a DVD player, and this data processing unit 5 is a computer.This data processing unit 5 is connected to this product 3 to be measured by a USB line (not shown), for generating described CEC instruction and sending CEC instruction, as the instruction of CEC machine open/close and the instruction of CEC volume adjusting etc. by this product 3 to be measured of this USB alignment.This HDMI bus 2 comprises first end 21,1 second end 22, data wire 23 and a CEC single line 24, and wherein, the first end 21 of this HDMI bus 2 is connected with this product 3 to be measured.

In the present embodiment, this testing apparatus 1 comprises keyset 100 and a processor 200.

This keyset 100 comprises one first converting interface 101,1 second converting interface 102 and a switching input port 103.This switching input port 103 is for being connected with the second end 22 of this HDMI bus 2.This switching input port 103 comprises CEC pin 1031 and a data pin 1032.This first converting interface 101 is for being connected with this CEC pin 1031, thus be connected with the CEC single line 24 in this HDMI bus 2 by this CEC pin 1031, this first converting interface 101 is also connected with this processor 200, and this CEC single line 24 is led to this processor 200.Second converting interface 102 for being connected with this data pin 1032, thus is connected with the data wire 23 in this HDMI bus 2 by this data pin 1032.This data wire 23 also for being connected with a display unit 4, thus is connected to this display unit 4 by this second converting interface 102.Therefore, this display unit 4 receives the audio/video signal on the product to be measured 3 of data wire 23 transmission and displays the play.In the present embodiment, this display unit 4 is a digital television.

If this product 3 to be measured has CEC function, this product 3 to be measured is when receiving this CEC instruction, can respond to this CEC instruction and perform corresponding operation, now, this product 3 to be measured will change the level signal exported by the CEC single line 24 in this HDMI bus 2, that is, this product 3 to be measured performs the front and back of corresponding operating according to this CEC instruction, and the signal on the CEC single line 24 in described HDMI bus 2 will change and export high and low level signal alternately.

This processor 200 receives level signal before and after this CEC instruction on described CEC single line 24 for detecting this product to be measured.If this processor 200 detects this level signal when being high and low level signal alternately, then show that this product 3 to be measured has CEC function; Otherwise, if this processor 200 detect this level signal be lasting high level signal or lasting low level signal time, then show that this product 3 to be measured does not have CEC function.In the present embodiment, this processor 200 is central processing unit (Central Processing Unit, CPU) or microprocessor (Microcontroller).

In the present embodiment, this processor 200 is directly connected with this data processing unit 5.This data processing unit 5 is for after this CEC instruction of transmission, obtain the detecting result of this processor 200, then a test result is produced according to the detecting result of described acquisition, and show this test result, such as, when to detect this level signal be high and low level signal alternately to this processor 200, this data processing unit 5 shows " test is normal ".

As shown in Figure 2, in other embodiments, this processor 200 is not connected with this data processing unit 5.In this case, this testing apparatus 1 also comprises an alarm unit 300 be connected with this processor 200 further.When detecting this level signal and being high and low level signal alternately, this processor 200 controls this alarm unit 300 and produces an alarm signal.In the present embodiment, this alarm unit 300 is a buzzer, and this processor 200 controls this buzzer when detecting this level signal and being the high and low level signal replaced and produces buzzer.In other real-time mode, this alarm unit 300 is a LED, and this processor 200 controls this LED when detecting this level signal and being the high and low level signal replaced and glimmers continuously.

Fig. 3 illustrates the flow chart of the High-definition Digital Multimedia Interface function test method in the present invention one better embodiment, and the method is applied to above-mentioned testing apparatus 1, and above-mentioned testing apparatus 1 is connected to a product 3 to be measured by HDMI bus 2.This HDMI bus 2 comprises first end 21,1 second end 22, data wire 23 and a CEC single line 24, and wherein, the first end 21 of this HDMI bus 2 is connected with this product 3 to be measured.This testing apparatus 1 comprises keyset 100 and a processor 200, and wherein, this keyset 100 comprises one first converting interface 101 and a switching input port 103.The method comprises the following steps:

Step S31: this data processing unit 5 sends a CEC instruction to this product 3 to be measured.

Step S32: this processor 200 is detected this product to be measured and received level signal before and after this CEC instruction on described CEC single line 24.Wherein, this switching input port 103 is connected with the second end 22 of this HDMI bus 2.This switching input port 103 comprises a CEC pin 1031.This first converting interface 101 is connected with this CEC pin 1031, thus is connected with the CEC single line 24 in this HDMI bus 2 by this CEC pin 1031; This first converting interface 101 is also connected with this processor 200, and this CEC single line 24 is led to this processor 200.

Step S33: this data processing unit 5, after this CEC instruction of transmission, obtains the detecting result of this processor 200, then produces a test result according to the detecting result of described acquisition, and show this test result.Wherein, when to detect this level signal be high and low level signal alternately to this processor 200, this data processing unit 5 shows " test is normal ".

Those skilled in the art will be appreciated that; above execution mode is only used to the present invention is described; and be not used as limitation of the invention; as long as within spirit of the present invention, the appropriate change do above embodiment and change all drop within the scope of protection of present invention.

Claims (9)

1. a testing apparatus, a product to be measured is connected to by a HDMI bus, this HDMI bus comprises a CEC single line, one first end and one second end, the first end of this HDMI bus is connected with product to be measured, it is characterized in that, this testing apparatus comprises a keyset and a processor, this keyset comprises one first converting interface and a switching input port, this switching input port is connected with the second end of this HDMI bus, this switching input port comprises a CEC pin, this first converting interface is connected with this CEC pin, thus be connected with the CEC single line in this HDMI bus by this CEC pin, this first converting interface is also connected with this processor, and CEC single line is led to this processor, this processor receives level signal on the described CEC single line in front and back of a CEC instruction for detecting this product to be measured, wherein, when to detect this level signal be high and low level signal alternately to this processor, shows that this product to be measured has CEC function.

2. testing apparatus as claimed in claim 1, it is characterized in that, this keyset also comprises one second converting interface, described HDMI bus also comprises a data wire, the switching input port of described keyset also comprises a data pin, described second converting interface is used for being connected with this data pin, thus be connected with the data wire in this HDMI bus by this data pin, this second converting interface is also for being connected with a display unit, thus this data wire is connected to this display unit, make the audio/video signal on this product to be measured be sent to this display unit by data wire simultaneously.

3. testing apparatus as claimed in claim 1, it is characterized in that, this processor is central processing unit or microprocessor.

4. testing apparatus as claimed in claim 1, is characterized in that, when this processor level signal detected on this CEC single line be lasting high level signal or lasting low level signal time, show to judge that this product to be measured does not have CEC function.

5. testing apparatus as claimed in claim 1, it is characterized in that, this processor is connected for the data processing unit sending this CEC instruction with one, this data processing unit is used for the detecting result obtaining this processor after sending this CEC instruction, then produce a test result according to the detecting result of described acquisition, and show this test result.

6. testing apparatus as claimed in claim 1, it is characterized in that, this testing apparatus also comprises an alarm unit be connected with this processor further, and this processor also for when detecting this level signal and being high and low level signal alternately, controls this alarm unit and produces an alarm signal.

7. testing apparatus as claimed in claim 6, it is characterized in that, this alarm unit is a buzzer, and this processor, when detecting this level signal and being high and low level signal alternately, controls this buzzer and produces buzzer.

8. testing apparatus as claimed in claim 6, it is characterized in that, this alarm unit is a LED, and this processor, when detecting this level signal and being high and low level signal alternately, controls this LED and glimmers continuously.

9. a High-definition Digital Multimedia Interface function test method, run in a testing apparatus, this testing apparatus is connected to a product to be measured by a HDMI bus, this HDMI bus comprises a CEC single line, a first end and one second end, the first end of this HDMI bus is connected with product to be measured, and this testing apparatus comprises a keyset and a processor, and this keyset comprises one first converting interface and a switching input port, it is characterized in that, the method comprises:

A CEC instruction is sent to this product to be measured;

This processor is detected this product to be measured and is received level signal before and after this CEC instruction on described CEC single line, wherein, the switching input port of this keyset is connected with the second end of this HDMI bus, this switching input port comprises a CEC pin, this first converting interface is connected with this CEC pin, thus be connected with the CEC single line in this HDMI bus by this CEC pin, this first converting interface is also connected with this processor, and this CEC single line is led to this processor; And

When detecting this level signal and being the high and low level signal replaced, this processor judges that this product to be measured has CEC function.