CN101567178A - Method and device for realizing VGA wake-up function by utilizing universal interfaces of display - Google Patents
Method and device for realizing VGA wake-up function by utilizing universal interfaces of display Download PDFInfo
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- CN101567178A CN101567178A CNA200810241805XA CN200810241805A CN101567178A CN 101567178 A CN101567178 A CN 101567178A CN A200810241805X A CNA200810241805X A CN A200810241805XA CN 200810241805 A CN200810241805 A CN 200810241805A CN 101567178 A CN101567178 A CN 101567178A
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- 230000037007 arousal Effects 0.000 claims description 15
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Abstract
The invention provides a method and a device for realizing VGA wake-up function by utilizing universal interfaces of a display, which get rid of dependence on special hardware in the process of realizing VGA signal detection. The technical method is implemented by utilizing a general purpose input/output interface (GPIO) of a main-control chip of a display device to detect synchronizing field signals converted via a steady-voltage conversion control module and detecting algorithm through software in the main-control chip. When a special VGA signal monitoring program set by the main-control chip judges a VGA input signal to be an effective low-level signal, and the number of continuously-detected synchronous heads is equal to a set value of detection, a main-control system is started to realize VGA wake-up operation, otherwise the operation returns to a synchronous detection cycling program. The device for realizing the VGA wake-up function consists of the main-control chip and the steady-voltage conversion control module, wherein input signals are connected with pins 1 and 5 of a signal input end of the steady-voltage conversion control module, and output pins 8 and 12 of the steady-voltage conversion control module are connected with the GPIO interface of the main-control chip.
Description
Technical field
The present invention relates to a kind of VGA awakening method of display, particularly utilize the display general-purpose interface to realize the method and the device of VGA arousal function.
Background technology
In the prior art, the method that realizes the VGA arousal function generally is to realize by the special-purpose related hardwares such as synchronous detecting element, counter and relevant control register of main control chip control, main control chip control synchronous detecting element detects the VGA signal of input, when synchronous detecting element detected the VGA signal, master control system started the VGA arousal function.But because the existence setting of these hardware, this class chip is mainly used in high-end type, and cost is higher.How to utilize the program of simple integrated circuit and cooperation that the Detection ﹠ Controling of realization to the VGA signal are set, break away from dependence simultaneously, become the urgent problem of the VGA signal enabling control of televisor or display these specialized hardwares.
Summary of the invention
For solving the shortcoming and defect of prior art, utilize the display general-purpose interface to realize the method and the device of VGA arousal function, this method is to utilize a universal input/output interface (GPIO) of display device main control chip, the synchronizing field signal of detection after voltage stabilizing conversion and control module converts, and realize by the software detection algorithm in the main control chip, realize that the method for VGA arousal function is finished according to the following steps:
A, display device is under standby mode, main control chip has added VGA field synchronization trace routine in the program of standby mode, the VGA signal that the GPIO mouth is received detects, main control chip judges at first whether this signal is the low level useful signal, if high level signal, then main system is not carried out any processing operation, returning the VGA field synchronization after the variable parameter value of storage correspondence simultaneously detects in the loop program, carry out next step cycle detection program, if main control chip is judged when this signal is effective low level signal, then the main control chip will be further judged the number of the synchronous head of this signal
B, stored special VGA signal monitoring program in the storer of main control chip in advance, stipulated in this program from detecting beginning to detecting the maximum permissible value that detects cycle index when finishing, the synchronous head number is judged the setting value that detects, and the value of information of the last level signal that receives of main control chip, when the signal of GPIO interface reception is effective low level, main control chip GPIO begins to carry out the detection of synchronizing signal, the high-low level state of main control chip program record synchronizing signal in each cycle detection, this field sync signal and the level signal information of last record are compared, as meet low level to the saltus step of high level, promptly a synchronous head appears in record, analyze and calculate detected synchronous head signal number, as judging in certain hour cycle or certain cycle detection number of times, if the main control chip judgement is consecutively detected the setting value that the number of synchronous head equals to detect, promptly be judged to be the VGA signal and inserted current display device, and call control program under the main control chip normal startup mode, start master control system, realize the wake operation of VGA, otherwise, returning the VGA field synchronization detects in the loop program
The synchronous head number, when input, low level is represented the beginning that detects, does not detect once saltus step from low to high after this, i.e. expression detects a field synchronization head.
In the described steps A, when not inserting that VGA interface or VGA interface insert peripheral unit but this peripheral unit not under the situation of outputting VGA signal, voltage stabilizing conversion and control module is changed to invalid high level with the GPIO interface level.
Utilize the display general-purpose interface to realize the device of VGA arousal function, this device is made up of main control chip and voltage stabilizing conversion and control module, wherein VGA field synchronization input signal is connected with signal input part 1,5 pins of voltage stabilizing conversion and control module, voltage stabilizing conversion and control module output pin 8,12 be connected with the GPIO interface of main control chip, VGA field synchronization input signal is after 3.3 volts the output signal through twice reverse conversion, from voltage stabilizing conversion and control module 8,12 pins output, be transferred to then in the main control chip GPIO interface.
The invention has the beneficial effects as follows, the VGA arousal function of some chips is become the process that is mainly realized by software by the dependence special hardware, utilize common GPIO interface to realize the detection of VGA signal, and then finish the VGA wake operation, the operation of the VGA arousal function that the simple voltage stabilizing chip of this utilization integrated circuit, general GPIO interface are realized, broken away from dependence to specialized hardware, simple in structure, implement conveniently to reduce production costs simultaneously.
Description of drawings
Accompanying drawing 1 is a VGA detection signal programmed control input process flow diagram of the present invention
Accompanying drawing 2 is a circuit component connection layout of the present invention
Embodiment
Referring to accompanying drawing 1, this method is to utilize a universal input/output interface (GPIO) of display device main control chip, the synchronizing field signal of detection after voltage stabilizing conversion and control module converts, and realize by the software detection algorithm in the main control chip, realize that the method for VGA arousal function is finished according to the following steps:
A, display is under standby mode, main control chip starts VGA field synchronization trace routine, the VGA signal that the GPIO interface is received detects, main control chip judges whether this signal is the low level useful signal, if high level signal, then main system is not carried out any start-up operation, the variable parameter value of storage correspondence simultaneously, the variate-value that is marked with a level signal saltus step is set to 1, the variable that indicates cycle index simultaneously adds 1 automatically, after return the VGA field synchronization and detect in the loop program, if main control chip is judged when this signal is effective low level signal, then the main control chip will be further judged the number of the synchronous head of this signal
B, stored special VGA signal monitoring program in the storer of main control chip in advance, stipulated in this program from detecting beginning to detecting the maximum permissible value that detects cycle index when finishing, the synchronous head number is judged the setting value that detects, and the value of information of the last level signal that receives of main control chip, when the signal of GPIO interface reception is effective low level, main control chip GPIO interface begins to carry out the detection of synchronizing signal, the high-low level state of main control chip program record synchronizing signal in each cycle detection, this field sync signal and the level signal information of last record are compared, as meet low level to the saltus step of high level, promptly a synchronous head appears in record, analyze and calculate detected synchronous head signal number, as judging in certain hour cycle or certain cycle detection number of times, if the main control chip judgement is consecutively detected the setting value that the number of synchronous head equals to detect, promptly be judged to be the VGA signal and inserted current display device, and call control program under the main control chip normal startup mode, start master control system, realize the wake operation of VGA, otherwise, returning the VGA field synchronization detects in the loop program
The synchronous head number, when input, low level is represented the beginning that detects, does not detect once saltus step from low to high after this, i.e. and expression detects a field synchronization head, and promptly rising edge detects.
In described steps A, when not inserting that VGA port or VGA insert peripheral unit but this peripheral unit not under the situation of outputting VGA signal, voltage stabilizing conversion and control module is changed to invalid high level with the GPIO interface level.
Referring to accompanying drawing 2, a kind of device that utilizes the display universal port to realize the VGA arousal function, this device is made up of main control chip and voltage stabilizing conversion and control module, the signal input part 1 of VGA field synchronization input signal and voltage stabilizing conversion and control module wherein, 5 pins connect, voltage stabilizing conversion and control module output pin 8,12 are connected with the GPIO interface of main control chip, pass back in input pin 3 and the pin 9 after VGA field synchronization input signal process pin 2 and pin 6 conversions, the VGA input signal is after 3.3 volts the output signal through voltage stabilizing conversion and control module twice reverse conversion like this, from voltage stabilizing conversion and control module 8, the output of 12 pins is transferred in the main control chip GPIO interface then.
Claims (3)
1, utilize the display general-purpose interface to realize the method and the device of VGA arousal function, it is characterized in that: this method is to utilize a universal input/output interface (GPIO) of display device main control chip, the synchronizing field signal of detection after voltage stabilizing conversion and control module converts, and realize by the software detection algorithm in the main control chip, realize that the method for VGA arousal function is finished according to the following steps:
A, display device is under standby mode, main control chip has added VGA field synchronization trace routine in the program of standby mode, the VGA signal that the GPIO mouth is received detects, main control chip judges at first whether this signal is the low level useful signal, if high level signal, then main system is not carried out any processing operation, returning the VGA field synchronization after the variable parameter value of storage correspondence simultaneously detects in the loop program, carry out next step cycle detection program, if main control chip is judged when this signal is effective low level signal, then the main control chip will be further judged the number of the synchronous head of this signal
B, stored special VGA signal monitoring program in the storer of main control chip in advance, stipulated in this program from detecting beginning to detecting the maximum permissible value that detects cycle index when finishing, the synchronous head number is judged the setting value that detects, and the value of information of the last level signal that receives of main control chip, when the signal of GPIO interface reception is effective low level, main control chip GPIO begins to carry out the detection of synchronizing signal, the high-low level state of main control chip program record synchronizing signal in each cycle detection, this field sync signal and the level signal information of last record are compared, as meet low level to the saltus step of high level, promptly a synchronous head appears in record, analyze and calculate detected synchronous head signal number, as judging in certain hour cycle or certain cycle detection number of times, if the main control chip judgement is consecutively detected the setting value that the number of synchronous head equals to detect, promptly be judged to be the VGA signal and inserted current display device, and call control program under the main control chip normal startup mode, start master control system, realize the wake operation of VGA, otherwise, returning the VGA field synchronization detects in the loop program
The synchronous head number, when input, low level is represented the beginning that detects, does not detect once saltus step from low to high after this, i.e. expression detects a field synchronization head.
2, the method for utilizing the display general-purpose interface to realize the VGA arousal function according to claim 1, it is characterized in that: in the described steps A, when not inserting that VGA interface or VGA interface insert peripheral unit but this peripheral unit not under the situation of outputting VGA signal, voltage stabilizing conversion and control module is changed to invalid high level with the GPIO interface level.
3, utilize the display general-purpose interface to realize the device of VGA arousal function, it is characterized in that: this device is made up of main control chip and voltage stabilizing conversion and control module, wherein VGA field synchronization input signal is connected with signal input part 1,5 pins of voltage stabilizing conversion and control module, voltage stabilizing conversion and control module output pin 8,12 be connected with the GPIO interface of main control chip, VGA field synchronization input signal is after 3.3 volts the output signal through twice reverse conversion, from voltage stabilizing conversion and control module 8,12 pins output, be transferred to then in the main control chip GPIO interface.
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| CN 200810241805 CN101567178B (en) | 2008-12-23 | 2008-12-23 | Method and device for realizing VGA wake-up function by utilizing universal interfaces of display |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101783868A (en) * | 2010-03-24 | 2010-07-21 | 北京邮电大学 | Method for transmitting user data by adopting video synchronizing signal lines |
| CN102075706A (en) * | 2009-11-24 | 2011-05-25 | 康佳集团股份有限公司 | Automatic television awakening method, circuit and television |
| CN102647571A (en) * | 2011-02-16 | 2012-08-22 | Tcl数码科技（深圳）有限责任公司 | Automatic awakening system and awakening method for video display equipment as well as video display equipment |
| CN103037240A (en) * | 2012-12-11 | 2013-04-10 | 天津天地伟业数码科技有限公司 | Video signal detection method of digital optical terminal |
| CN103135954A (en) * | 2011-08-23 | 2013-06-05 | 三星电子株式会社 | Display apparatus and control method thereof |
| CN109342855A (en) * | 2018-11-28 | 2019-02-15 | 福建捷联电子有限公司 | A kind of bad automatic testing method of VGA signal wire of test |
| TWI751660B (en) * | 2020-08-26 | 2022-01-01 | 龍星顯示科技股份有限公司 | Image switching control method and image processing device |
Family Cites Families (3)
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| US20060176290A1 (en) * | 2005-02-09 | 2006-08-10 | Dell Products L.P. | Display device featuring a reduced amount of time for detecting video input signals |
| CN1841247A (en) * | 2005-03-28 | 2006-10-04 | 联想(北京)有限公司 | Apparatus and method for controlling master power supply of display device |
| CN101150689B (en) * | 2007-10-25 | 2011-05-25 | 康佳集团股份有限公司 | Method and circuit for realizing LCD TV VGA arousing function |
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2008
- 2008-12-23 CN CN 200810241805 patent/CN101567178B/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102075706A (en) * | 2009-11-24 | 2011-05-25 | 康佳集团股份有限公司 | Automatic television awakening method, circuit and television |
| CN101783868A (en) * | 2010-03-24 | 2010-07-21 | 北京邮电大学 | Method for transmitting user data by adopting video synchronizing signal lines |
| CN102647571A (en) * | 2011-02-16 | 2012-08-22 | Tcl数码科技（深圳）有限责任公司 | Automatic awakening system and awakening method for video display equipment as well as video display equipment |
| CN102647571B (en) * | 2011-02-16 | 2015-01-07 | Tcl数码科技（深圳）有限责任公司 | Automatic awakening system and awakening method for video display equipment as well as video display equipment |
| CN103135954A (en) * | 2011-08-23 | 2013-06-05 | 三星电子株式会社 | Display apparatus and control method thereof |
| CN103135954B (en) * | 2011-08-23 | 2017-12-22 | 三星电子株式会社 | Display device and its control method |
| CN103037240A (en) * | 2012-12-11 | 2013-04-10 | 天津天地伟业数码科技有限公司 | Video signal detection method of digital optical terminal |
| CN109342855A (en) * | 2018-11-28 | 2019-02-15 | 福建捷联电子有限公司 | A kind of bad automatic testing method of VGA signal wire of test |
| TWI751660B (en) * | 2020-08-26 | 2022-01-01 | 龍星顯示科技股份有限公司 | Image switching control method and image processing device |
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