CN102843575A - VGA (Video Graphics Array) port test device and test method thereof - Google Patents
VGA (Video Graphics Array) port test device and test method thereof Download PDFInfo
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- CN102843575A CN102843575A CN2011101689357A CN201110168935A CN102843575A CN 102843575 A CN102843575 A CN 102843575A CN 2011101689357 A CN2011101689357 A CN 2011101689357A CN 201110168935 A CN201110168935 A CN 201110168935A CN 102843575 A CN102843575 A CN 102843575A
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Abstract
The invention discloses a VGA (Video Graphics Array) port test device. The VGA port test device comprises a test signal module, a voltage collection module, a frequency collection module, a control module and a prompting module, wherein the test signal module is used for sending a video test signal to a VGA port; the voltage collection module is respectively used for collecting voltage signals at a red signal output end, a green signal output end and blue signal output end of the VGA port; the frequency collection module is used for collecting a line frequency signal of a line synchronous signal output end and a field frequency signal of a field synchronous signal output end of the VGA port; the control module is preset with a red voltage comparison value, a green voltage comparison value, a blue voltage comparison value, a line frequency comparison value and a field frequency comparison value which correspond to the video test signal, and the control module is used for sequentially and respectively comparing the comparison values with a red voltage signal, a green voltage signal, a blue voltage signal, the line frequency signal and a field synchronous signal one by one, and judging whether all the comparison values are respectively equal to signals or not; and the prompting module is used for prompting that the VGA port is normal if the comparison values are respectively equal to signals or prompting abnormal if the comparison values are not respectively equal to signals. According to the VGA port test device disclosed by the invention, the test is convenient. In addition, the invention also provides a VGA port test method.
Description
Technical field
The present invention relates to a kind of VGA port testing device and method of testing thereof.
Background technology
VGA (Video Graphic Array the shows the drawing array) port that an outputting video signal all can be arranged on the main frame of existing computer.Test to the VGA port at present mainly relies on external display.During the VGA interface testing; Usually on the VGA port, connect a display; Then the tester again through the testing software of installing in the main frame continuous export the vision signal of the monochromatic or color bar of full frame black, full frame white, full frame redness, full frame green, full frame blueness and different brightness to display; And watch display whether can normally show corresponding image simultaneously, whether the signal of artificial judgment VGA port output is normal.Yet the tester need test a large amount of displays, and frequent color switching can cause the tester to use kopiopia, is unfavorable for tester's health.
Summary of the invention
In view of this, be necessary to provide a kind of VGA port testing device and method of testing thereof that can directly output test result.
A kind of VGA port testing device, this VGA port testing device is used to test the VGA port.This VGA port comprises danger signal output, green output, blue signal output, line synchronizing signal output and field sync signal output.Said VGA port testing device comprises: test signal module is used for sending video test signals to said VGA port; Voltage acquisition module; All be electrically connected with said danger signal output, green output, blue signal output, and be used for gathering respectively the red voltage signal of said danger signal output, green output and blue signal output, green voltage signal and blue voltage signal; Frequency acquisition module all is electrically connected with said line synchronizing signal output and field sync signal output, and is used to gather the line frequency signal and the field frequencies range signal of said line synchronizing signal output and field sync signal output; Control module; All electrically connect with said voltage acquisition module and frequency acquisition module; Said control module is preset with the red voltage comparison value corresponding with said video test signals, green voltage comparison value, blue voltage comparison value, line frequency comparison value and field frequencies range comparison value; And said red voltage signal, green voltage signal, blue voltage signal, line frequency signal and field frequencies range signal compared with said red voltage comparison value, green voltage comparison value, blue voltage comparison value, line frequency comparison value and field frequencies range comparison value respectively one by one, judge whether all to equate separately; And reminding module, electrically connect with said control module, be used to obtain the judged result of said control module, if above-mentioned comparative result is all to equate separately, then points out said VGA port normal, otherwise point out said VGA port unusual.
A kind of VGA port testing method; This method is used to test a VGA port; This VGA port comprises danger signal output, green output, blue signal output, line synchronizing signal output and field sync signal output, and this method may further comprise the steps: send video test signals to said VGA port; Gather red voltage signal, green voltage signal and the blue voltage signal of danger signal output, green output and the blue signal output of said VGA port; Gather the line frequency signal and the field frequencies range signal of said line synchronizing signal output and field sync signal output; Said red voltage signal, green voltage signal, blue voltage signal line frequency signal and field frequencies range signal is corresponding one by one relatively with preset red voltage comparison value, green voltage comparison value, blue voltage comparison value, line frequency comparison value and field frequencies range comparison value, judge whether all to equate separately; If said red voltage signal, green voltage signal, blue voltage signal line frequency signal and field frequencies range signal all equate with said red voltage comparison value, green voltage comparison value, blue voltage comparison value, line frequency comparison value and field frequencies range comparison value separately, point out said VGA port normal; If it is unequal in said red voltage signal, green voltage signal, blue voltage signal line frequency signal and field frequencies range signal and said red voltage comparison value, green voltage comparison value, blue voltage comparison value, line frequency comparison value and the field frequencies range comparison value at least one being arranged, point out said VGA port unusual.
The present invention judges through VGA port testing device and method of testing thereof whether the voltage and the synchronous signal frequency of red, green, blue output of said VGA port be normal; Directly export whether normally judged result of said VGA port with this, thereby reduce artificial viewing time.
Description of drawings
Fig. 1 is the block diagram of VGA port testing device provided by the invention.
Fig. 2 is the flow chart of VGA port testing method provided by the invention.
The main element symbol description
| The VGA |
100 |
| |
10 |
| |
20 |
| |
30 |
| |
40 |
| |
50 |
| The |
200 |
| The |
210 |
| The |
220 |
| The |
230 |
| The line synchronizing |
240 |
| The field |
250 |
| |
300 |
| Single- |
400 |
| The |
500 |
Following embodiment will combine above-mentioned accompanying drawing to further specify the present invention.
Embodiment
To combine accompanying drawing below, the present invention will be done further detailed description.
See also Fig. 1, a kind of VGA port testing device 100 that is used to test a VGA (Video Graphic Array shows the drawing array) port 200 provided by the invention.Said VGA port 200 comprises danger signal output 210, green output 220, blue signal output 230, line synchronizing signal output 240 and field sync signal output 250.Above-mentioned each output is a stitch of above-mentioned VGA port 200.
In this execution mode, said VGA port testing device 100 comprises test signal module 10, control module 20, voltage acquisition module 30 and frequency acquisition module 40.
Said test signal module 10, control module 20 and reminding module 50 are installed in the computer 300.Said voltage acquisition module 30 and frequency acquisition module 40 are installed in the single-chip microcomputer 400.Said computer 300 and said single-chip microcomputer 400 electrically connect through usb data line 500.The pin of said single-chip microcomputer 400 and said danger signal output 210, green output 220, blue signal output 230, line synchronizing signal output 240 and field sync signal output 250 all electrically connect.
Said test signal module 10 all electrically connects with said VGA port 200 and control module 20, is used for sending video test signals to said VGA port 200.This video test signals is used for making display (figure does not draw) to be displayed in full screen black, white, redness, green and blue, and makes display show monochromatic or color bar with different brightness.When said test signal module 10 when said VGA port 200 sends video test signals; Said danger signal output 210, green output 220 and blue signal output 230 will produce corresponding voltage signal, and said line synchronizing signal output 240 and field sync signal output 250 will produce the frequency signal of correspondence.
Said voltage acquisition module 30 all is electrically connected with said danger signal output 210, green output 220 and blue signal output 230, is used to gather said danger signal output 210, green output 220 and the red voltage signal of blue signal output 230, green voltage signal and blue voltage signal.
Said frequency acquisition module 40 all is electrically connected with said line synchronizing signal output 240 and field sync signal output 250, is used to gather the line frequency signal and the field frequencies range signal of said line synchronizing signal output 240 and field sync signal output 250.
Said control module 20 all electrically connects with said voltage acquisition module 30 and frequency acquisition module 40, obtains red voltage signal, green voltage signal, blue voltage signal, line frequency signal and field frequencies range signal that said voltage acquisition module 30 and frequency acquisition module 40 are gathered.
Be preset with the red voltage comparison value V1 corresponding, green voltage comparison value V2, blue voltage comparison value V3, row voltage comparison value V4 and field voltage comparison value V5 in the said control module 20 with said video test signals.The said red voltage signal that said control module 20 will be gathered respectively, green voltage signal, blue voltage signal, line frequency signal and field frequencies range signal are corresponding one by one relatively with said red voltage comparison value V1, green voltage comparison value V2, blue voltage comparison value V3, line frequency comparison value V4 and field frequencies range comparison value V5, judge whether all to equate separately.
If all equate, it is normal that said control module 20 outputs first signal is used for controlling the said VGA port of said reminding module 50 promptings 200.This first signal can be analog signal or digital signal.In this execution mode, control module 20 compares the result of each collection with corresponding comparison value, if each comparative result all is equal separately, said first signal is a digital signal 1.
If the value that said voltage acquisition module 30 and frequency acquisition module 40 gathered and corresponding comparison value relatively after; It is unequal having a comparative result at least, and it is unusual that said control module 20 output secondary signals are used for controlling the said VGA port of said reminding module 50 promptings 200.This secondary signal can be analog signal or digital signal.In this execution mode, said secondary signal is a digital signaling zero.
Said reminding module 50 electrically connects with said control module 20, is used to obtain the judged result of said control module 20, if above-mentioned comparative result is all to equate separately, then points out said VGA port 200 normal, otherwise points out said VGA port 200 unusual.In this execution mode, if said control module 20 outputs first signal, said reminding module 50 outputs first cue, if said control module 20 output secondary signals, said reminding module 50 outputs second cue.Said first cue and second cue can be visual signals, also can be audible signals.In this execution mode, said first cue and second cue are the letter signals that said reminding module 50 shows through display (the figure meta is drawn).First cue is " normally ", and second cue is " unusually ".
See also Fig. 2, be a kind of port testing method of testing a VGA port that embodiment of the present invention provides, this method may further comprise the steps:
Step S601: send video test signals to the VGA port.In this execution mode, send video test signals through said test signal module 10.
Step S603: red voltage signal, green voltage signal and the blue voltage signal of gathering danger signal output 210, green output 220 and the blue signal output 230 of said VGA port.In this execution mode, utilize said voltage acquisition module 30 to gather said red voltage signal, green voltage signal and blue voltage signal.
Step S605: line frequency signal and the field frequencies range signal of gathering said line synchronizing signal output 240 and field sync signal output 250.In this execution mode, utilize said frequency acquisition module 40 to gather line frequency signal and field frequencies range signal.
Step S607: said red voltage signal, green voltage signal, blue voltage signal line frequency signal and field frequencies range signal is corresponding one by one relatively with preset said red voltage comparison value V1, green voltage comparison value V2, blue voltage comparison value V3, line frequency comparison value V4 and field frequencies range comparison value V5, judge whether all to equate separately.In this execution mode, utilize said control module 20 to judge.
Step S609:, point out said VGA port 200 normal if said red voltage signal, green voltage signal, blue voltage signal line frequency signal and field frequencies range signal all equate with said red voltage comparison value V1, green voltage comparison value V2, blue voltage comparison value V3, line frequency comparison value V4 and field frequencies range comparison value V5 separately.In this execution mode, utilize said reminding module 50 outputs first cue.
Step S611: if among said red voltage signal, green voltage signal, blue voltage signal line frequency signal and field frequencies range signal and said red voltage comparison value V1, green voltage comparison value V2, blue voltage comparison value V3, line frequency comparison value V4 and the field frequencies range comparison value V5 at least one is arranged is unequal, points out said VGA port unusual.In this execution mode, utilize said reminding module 50 outputs second cue.
The present invention judges through VGA port testing device and port testing method whether the voltage and the synchronous signal frequency of red, green, blue output of said VGA port be normal; Directly export whether normally judged result of said VGA port with this, thereby reduce artificial viewing time.
It is understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change the protection range that all should belong to claim of the present invention with distortion.
Claims (6)
1. VGA port testing device; Whether this VGA port testing device is used to test the VGA port normal; This VGA port comprises danger signal output, green output, blue signal output, line synchronizing signal output and field sync signal output, and said VGA port testing device comprises:
Test signal module is used for sending video test signals to said VGA port;
Voltage acquisition module is electrically connected with the red voltage signal that is used to gather said danger signal output, green output and blue signal output, green voltage signal and blue voltage signal with said danger signal output, green output, blue signal output;
Frequency acquisition module is electrically connected to be used to gather the line frequency signal and the field frequencies range signal of said line synchronizing signal output and field sync signal output with said line synchronizing signal output and field sync signal output;
Control module; All electrically connect with said voltage acquisition module and frequency acquisition module; Said control module is preset with the red voltage comparison value corresponding with said video test signals, green voltage comparison value, blue voltage comparison value, line frequency comparison value and field frequencies range comparison value; And said red voltage signal, green voltage signal, blue voltage signal, line frequency signal and field frequencies range signal compared with said red voltage comparison value, green voltage comparison value, blue voltage comparison value, line frequency comparison value and field frequencies range comparison value respectively one by one, judge whether all to equate separately; And
Reminding module electrically connects the judged result that is used to obtain said control module with said control module, if above-mentioned comparative result is all to equate separately, then points out said VGA port normal, otherwise points out said VGA port unusual.
2. VGA port testing device as claimed in claim 1 is characterized in that, if each comparative result all is equal separately, said control module is exported first signal, if it is unequal having a comparative result at least, and said control module output secondary signal.
3. VGA port testing device as claimed in claim 2 is characterized in that, said first signal and secondary signal all are digital signals.
4. VGA port testing device as claimed in claim 2 is characterized in that, if said control module is exported first signal, said reminding module is exported first cue, if said control module output secondary signal, said reminding module is exported second cue.
5. VGA port testing device as claimed in claim 4 is characterized in that, said first cue and second cue all are letter signals.
6. VGA port testing method; This method is used to test a VGA port; This VGA port comprises danger signal output, green output, blue signal output, line synchronizing signal output and field sync signal output, and this method may further comprise the steps:
Send video test signals to said VGA port;
Gather red voltage signal, green voltage signal and the blue voltage signal of danger signal output, green output and the blue signal output of said VGA port;
Gather the line frequency signal and the field frequencies range signal of said line synchronizing signal output and field sync signal output;
Said red voltage signal, green voltage signal, blue voltage signal line frequency signal and field frequencies range signal is corresponding one by one relatively with preset red voltage comparison value, green voltage comparison value, blue voltage comparison value, line frequency comparison value and field frequencies range comparison value, judge whether all to equate separately;
If said red voltage signal, green voltage signal, blue voltage signal line frequency signal and field frequencies range signal all equate with said red voltage comparison value, green voltage comparison value, blue voltage comparison value, line frequency comparison value and field frequencies range comparison value separately, point out said VGA port normal;
If it is unequal in said red voltage signal, green voltage signal, blue voltage signal line frequency signal and field frequencies range signal and said red voltage comparison value, green voltage comparison value, blue voltage comparison value, line frequency comparison value and the field frequencies range comparison value at least one being arranged, point out said VGA port unusual.
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| CN2011101689357A CN102843575A (en) | 2011-06-22 | 2011-06-22 | VGA (Video Graphics Array) port test device and test method thereof |
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| CN111526356A (en) * | 2020-03-24 | 2020-08-11 | 福建星网视易信息系统有限公司 | Automatic testing method and device for multi-channel video interface |
| CN113099148A (en) * | 2021-03-10 | 2021-07-09 | 山东英信计算机技术有限公司 | VGA output signal analysis device, system and use method |
| CN116382993A (en) * | 2023-05-26 | 2023-07-04 | 苏州浪潮智能科技有限公司 | VGA interface testing method, VGA interface testing device, computer equipment and storage medium |
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Application publication date: 20121226 |