CN105630442B - The implementation method of virtual display device in Android routers - Google Patents
The implementation method of virtual display device in Android routers Download PDFInfo
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- CN105630442B CN105630442B CN201510958225.2A CN201510958225A CN105630442B CN 105630442 B CN105630442 B CN 105630442B CN 201510958225 A CN201510958225 A CN 201510958225A CN 105630442 B CN105630442 B CN 105630442B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1407—General aspects irrespective of display type, e.g. determination of decimal point position, display with fixed or driving decimal point, suppression of non-significant zeros
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
- G06F9/45533—Hypervisors; Virtual machine monitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The present invention relates to a kind of implementation methods of virtual display device in Android routers, and a memory field is arranged to store the relevant parameter of the virtual display device in the router including (1)；(2) virtual display device and the driving of the virtual display device are registered in the Android routers；(3) by the driving of the virtual display device about the operation for being revised as the relevant parameter to the virtual display device stored in memory field to the operation of the virtual display device.Using the implementation method of virtual display device in the Android routers of this kind of structure, make not show that the router of equipment can also normal operation android system, and generation frame image data that can normally on virtual display device, time power consumption is saved, also provides scalability in terms of display for equipment.
Description
Technical field
The present invention relates to field of communication technology more particularly to network communication equipment, in particular to a kind of Android routers
The implementation method of middle virtual display device.
Background technology
Network is the essential tool of modern life, and gateway device plays a crucial role wherein.With
The development of Internet of Things, smart home, wisdom family become following developing direction, the network management as all smart machines
The intelligence of person, gateway device have become inexorable trend.In terms of operating system, android system with its powerful function, open
Putting property, the features such as can highly customizing, also become numerous immobile terminal intelligence in mobile terminal device market the supreme arrogance of a person with great power
The selection of energy equipment.
For reasons of cost, gateway device is generally all without display device, but for smart machine, easily grasps
Be as interface it is essential, router as gateway device, computer, mobile phone even TV be all can by network connection at
For its display terminal.Android system operates on linux kernel, is capable of providing personalized display interface, still
Android system needs kernel to provide addressable display equipment.
Frame buffering (framebuffer) is that linux system be an interface providing of display equipment, it is by display buffer
Abstract, the bottom difference of masked images hardware allows upper level applications directly to be carried out to display buffer under graphic model
Read-write operation.When android system accesses display equipment, it is not necessary to be concerned about specific location and the storage side of physically displayed buffering area
Formula, these are completed by specific frame buffered-display driver itself.But general specific frame buffered-display driver is only suitable for existing for equipment
It is particularly shown device, and Android routers need a kind of frame buffered-display driver being directed to there is no display device.
Invention content
The purpose of the present invention is overcoming the above-mentioned prior art, provides a kind of virtual display device driving, makes
Use memory headroom as the resource of the virtual display device, construction one actually not existing virtual display device
The implementation method of virtual display device in Android routers.
To achieve the goals above, the implementation method of virtual display device has such as in Android routers of the invention
Lower composition：
The implementation method of virtual display device, is mainly characterized by the Android routers, the method include with
Lower step：
(1) memory field is set in the router to store the relevant parameter of the virtual display device；
(2) virtual display device and the virtual display device are registered in the Android routers
Driving；
(3) it will be revised as in memory field about to the operation of the virtual display device in the driving of the virtual display device
The operation of the relevant parameter of the virtual display device of storage.
Further, further comprising the steps of between the step (2) and the step (3)：
(2.1) relevant parameter of the initialization virtual display device；
(2.2) a display caching area is set in the router, to store frame image data.
Further, further comprising the steps of after the step (3)：
(4) judge whether the frame image data in the display caching area writes complete；
(5) if the frame image data in the display caching area writes complete, the interruption of the virtual display device is sent
Number；
(6) if the frame image data in the display caching area does not write complete, continue step (4).
Further, the step (3) is specially：
By about the parameter to the virtual display device in the driving of the virtual display device read-write operation and setting
Operation is revised as the operation of the relevant parameter to the virtual display device stored in memory field.
The implementation method of virtual display device in the Android routers in the invention is used, compared with prior art,
With beneficial technique effect below：
1, Android routers do not show equipment really, but there is display device node in the operating system of equipment, and
Display image can be obtained from device node.
2, the Android operation system of Android routers need not change display subsystem, can really be deposited as accessing
Display equipment equally access virtual display device.
3, display equipment need not be transmitted data in linux kernel from display buffer, save image show it is required
Time and power consumption.
4, this method is suitable for that institute is in need to be run Android system but do not have the smart machine of display device.
Description of the drawings
Fig. 1 be the present invention Android routers in virtual display device implementation method flow chart.
Fig. 2 be the present invention Android routers in virtual display device implementation method realization principle figure.
Specific implementation mode
In order to more clearly describe the technology contents of the present invention, carried out with reference to specific embodiment further
Description.
The present invention is in the case of not true display device, by the method for the virtual display device in kernel for upper layer
Android system accesses, and when realizing specific display driving under the framebuffer driver frameworks of linux system, passes through
Meet android system to the access operation of display equipment, this hair using the mode of memory headroom analog display device entity
It is bright router to be solved the problems, such as not show under appointed condition be unable to operate normally android system.
In a preferred embodiment, the present invention is by realizing a kind of special display device drives, by one piece of spy
Fixed memory headroom is used as display device resource, the memory block is written in the various data parameters of equipment, construction one is actually
It is not existing to show equipment, while one piece of storage space is opened up from memory according to the device parameter of setting and is buffered as frame
Area.Android system obtains the device node when running, read or arrange parameter is mapped to virtual unit, and by frame buffer zone
To responsible display surfaceflinger service processes space, which can directly write to frame by the image data of generation
Buffering area realizes the display function on virtual unit.
It please refers to Fig.1 to shown in Fig. 2, the implementation method of virtual display device includes in Android routers of the invention
Following steps：
(1) memory field is set in the router to store the relevant parameter of the virtual display device；
(2) virtual display device and the virtual display device are registered in the Android routers
Driving；
(3) it will be revised as in memory field about to the operation of the virtual display device in the driving of the virtual display device
The operation of the relevant parameter of the virtual display device of storage.
In a preferred embodiment, further include following step between the step (2) and the step (3)
Suddenly：
(2.1) relevant parameter of the initialization virtual display device；
(2.2) a display caching area is set in the router, to store frame image data.
In a preferred embodiment, further comprising the steps of after the step (3)：
(4) judge whether the frame image data in the display caching area writes complete；
(5) if the frame image data in the display caching area writes complete, the interruption of the virtual display device is sent
Number；
(6) if the frame image data in the display caching area does not write complete, continue step (4).
In a preferred embodiment, the step (3) is specially：
By about the parameter to the virtual display device in the driving of the virtual display device read-write operation and setting
Operation is revised as the operation of the relevant parameter to the virtual display device stored in memory field.
The implementation method of virtual display device in the Android routers of the present invention, for the Android of no display equipment
Product provides a kind of implementation.Mainly by realizing a kind of special display device drives, using memory headroom as display
Device resource, construction one is not actually existing to show equipment, while opening up one piece of storage space from memory and being used as frame
Buffering area.The virtual display device provides display device node for android system, equivalent true display equipment.This side
Method make not show equipment router can also normal operation android system, and can be normally in virtual display device
On delta frame image, save time power consumption, also provide scalability in terms of display for equipment.
In practical applications, the Android routers processing method of virtual display device is real under frame buffered-display driver frame
A kind of existing special display device drives.Steps are as follows for specific implementation：
1, apply for one piece of memory field virtual_resourse, be used to store virtual display device resource.
2, register platforms virtual display device.
3, register platforms virtually show driving.
4, when platform drives and detects, initialization of virtual shows resource information.
5, to system application display buffer, for writing frame image data to user's space.
6, the operations such as read-write, setting of all about virtual display device data parameters in driving are changed to region of memory
The operation of virtual_resourse.
7, buffering area frame data, which write rear mold and send out, send virtual display device hardware terminal number.
The driving is compiled into the linux kernel for supporting Android, by the kernel mirror image and android system of generation
Mirror image programming enters in android routers, starting device, and virtual display device can work.
The implementation method of virtual display device in the Android routers in the invention is used, compared with prior art,
With beneficial technique effect below：
1, Android routers do not show equipment really, but there is display device node in the operating system of equipment, and
Display image can be obtained from device node.
2, the Android operation system of Android routers need not change display subsystem, can really be deposited as accessing
Display equipment equally access virtual display device.
3, display equipment need not be transmitted data in linux kernel from display buffer, save image show it is required
Time and power consumption.
4, this method is suitable for that institute is in need to be run Android system but do not have the smart machine of display device.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that can still make
Various modifications and alterations are without departing from the spirit and scope of the invention.Therefore, the description and the appended drawings should be considered as illustrative
And not restrictive.
Claims (4)
1. the implementation method of virtual display device in a kind of Android routers, which is characterized in that the method includes following
Step：
(1) memory field is set in the router to store the relevant parameter of the virtual display device；
(2) virtual display device and the driving of the virtual display device are registered in the Android routers；
(3) it will be revised as about to the operation of the virtual display device to being stored in memory field in the driving of the virtual display device
The virtual display device relevant parameter operation.
2. the implementation method of virtual display device in Android routers according to claim 1, which is characterized in that institute
It is further comprising the steps of between the step of stating (2) and the step (3)：
(2.1) relevant parameter of the initialization virtual display device；
(2.2) a display caching area is set in the router, to store frame image data.
3. the implementation method of virtual display device in Android routers according to claim 2, which is characterized in that institute
It is further comprising the steps of after the step of stating (3)：
(4) judge whether the frame image data in the display caching area writes complete；
(5) if the frame image data in the display caching area writes complete, the interrupt number of the virtual display device is sent；
(6) if the frame image data in the display caching area does not write complete, continue step (4).
4. the implementation method of virtual display device in Android routers according to claim 1, which is characterized in that institute
The step of stating (3) is specially：
It will be operated about the read-write operation of the parameter to the virtual display device and setting in the driving of the virtual display device
It is revised as the operation of the relevant parameter to the virtual display device stored in memory field.
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| CN105630442B true CN105630442B (en) | 2018-11-09 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101739289A (en) * | 2008-11-13 | 2010-06-16 | 闪联信息技术工程中心有限公司 | Method and device for setting display mode in Linux virtual machine |
| CN102243571A (en) * | 2011-07-08 | 2011-11-16 | 西安交通大学 | Embedded Hypervisor-oriented multi-window display virtual operation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9250700B2 (en) * | 2013-02-28 | 2016-02-02 | Apple Inc. | System and method for virtual displays |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101739289A (en) * | 2008-11-13 | 2010-06-16 | 闪联信息技术工程中心有限公司 | Method and device for setting display mode in Linux virtual machine |
| CN102243571A (en) * | 2011-07-08 | 2011-11-16 | 西安交通大学 | Embedded Hypervisor-oriented multi-window display virtual operation method |
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