CN109388247A - A kind of the AUX automatic answering device and method of KVM switcher - Google Patents
A kind of the AUX automatic answering device and method of KVM switcher Download PDFInfo
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- CN109388247A CN109388247A CN201811142369.0A CN201811142369A CN109388247A CN 109388247 A CN109388247 A CN 109388247A CN 201811142369 A CN201811142369 A CN 201811142369A CN 109388247 A CN109388247 A CN 109388247A
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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
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
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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
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
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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
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Abstract
The invention discloses the AUX automatic answering devices and method of a kind of KVM switcher, are related to Computer Control Technology field, it is intended to solve the problems, such as that existing DisplayPort type KVM switcher is inconvenient for use.Its key points of the technical solution are that including FPGA module and control panel；Control panel controls display and is connected with the host on the channel being switched to for switching over to the channel of KVM switcher；FPGA module is also used to when host is not connect with display, the virtual display AUX agency of automatic distribution one is connected with the host for fictionalizing multiple display AUX agencies；Wherein, display AUX agency is communicated for the video card with corresponding host and the video card of the host is made to be correctly completed initialization procedure, is not needed manual intervention, has been achieved the effect that the ease for use that can effectively improve DisplayPort type KVM switcher.
Description
Technical field
The present invention relates to Computer Control Technology fields, more particularly, to a kind of AUX automatic answering device of KVM switcher
And method.
Background technique
KVM is the abbreviation of Keyboard Video Mouse.KVM switcher is that common in main frame management is set
Standby, it can be realized with a set of keyboard, mouse and display and controls multiple devices.It briefly, is exactly with one group of keyboard, mouse
Mark and display control 2,4,8 even more main frames, and administrator can be in these main frames certainly
By switching, working efficiency is improved.
DisplayPort type KVM switcher is exactly the KVM switcher that video interface is DisplayPort form, is usually used
The host for being DisplayPort in connection video card interface.Similar also DVI type KVM switcher therewith, HDMI type KVM switching
Device etc..
Due to only one display interface device of KVM switcher, so synchronization can only have a host and display to connect
It connects.If several hosts start simultaneously, some hosts just necessarily occur does not have the case where display is attached thereto.In such case
Under, the host of Partial Species can not just normally complete the initialization of video card, and display is switched on the host even if later
It can not work normally.The appearance of this problem is determined by the characteristic of DisplayPort interface, in DisplayPort interface
In, other than the high speed primary link of transmission audio-video, it is also equipped with the AUX low speed chain circuit for information exchange.Host can lead to
The DPCD information and EDID information in AUX low speed chain circuit reading display are crossed, and link parameter is carried out according to these information
Configuration.If host does not read useful information by AUX when starting, will lead to host video card can not be normally completed initially
Change.
Current DisPlayPort type KVM switcher is to solve the above problems, be usually that display is switched to a master
On machine, then start the host, after the completion of this host-initiated, then display is switched to next host and starts master
Machine is successively operated until All hosts all start completions.
But prior art among the above has the following deficiencies: and is successively switched to display on each host simultaneously
Start corresponding host, until complicated operation for All hosts all start completions, complicated operation is to DisplayPort in this way
The use of type KVM switcher brings great inconvenience.
Summary of the invention
The object of the present invention is to provide the AUX automatic answering devices and method of a kind of KVM switcher, and having can be effective
Improve the effect of the ease for use of DisplayPort type KVM switcher.
Foregoing invention purpose one of the invention has the technical scheme that
A kind of AUX automatic answering device of KVM switcher, including display and several hosts, further includes:
Control panel is used to switch over the channel of KVM switcher, and controls display and the host on the channel that is switched to
It is connected；
FPGA module is used to fictionalize multiple display AUX agencies, is also used to when host is not connect with display, from
The virtual display AUX agency of dynamic distribution one is connected with the host；
Wherein, the display AUX agency is communicated for the video card with corresponding host and keeps the video card of the host correctly complete
At initialization procedure.
By using above-mentioned technical proposal, low speed signals all in KVM switcher are accessed in FPGA module, by FPGA mould
Block fictionalizes multiple display AUX agencies, and when host is not connect with display, FPGA module can distribute one virtually automatically
Display AUX agency be attached thereto, the virtual monitor AUX agency be responsible for is communicated with host video card, receive host
Read-write operation, and the inquiry of host is replied, so that host video card be helped to be correctly completed initialization procedure.Whole process by FPGA from
It is dynamic to complete, manual intervention is not needed, the ease for use of DisplayPort type KVM switcher is greatly improved.
The present invention is further arranged to: the FPGA module includes:
Multiple AUX proxy modules, the display AUX agency are virtually formed by corresponding AUX proxy module；
Multiple switching switch modules, the switching switch module is corresponding with AUX proxy module to be connected, for controlling the AUX generation
Manage the connection status between module and corresponding host；
AUX reader, be used for by the display DPCD information and EDID information read and be written to all AUX generations
It manages in module.
By using above-mentioned technical proposal, when device power, AUX reader is by AUX bus by the DPCD in display
FPGA is read in EDID information, and is written into all AUX proxy modules.After the completion of write-in, AUX reader according to
The running of the selection control switching switch module of control panel, the AUX bus of selected host are directly connected with the AUX of display,
Remaining not selected host, AUX bus are connected with corresponding AUX proxy module.All hosts can normally AUX lead to
Letter, to complete the initialization of video card, effectively improves the ease for use of KVM switcher.
The present invention is further arranged to: the AUX reader includes information reading/switch control module, the display
In DPCD information and EDID information read by information reading/switch control module and be written in all AUX proxy modules；
Information reading/the switch control module is also used to the selection control switching switch according to control panel to the channel of KVM switcher
The running of module.
The present invention is further arranged to: the AUX reader further includes HPD control module；The HPD control module is used for
When AUX automatic answering device powers on, the HPD signal of All hosts is set low；The HPD control module is also used to read when information
Take/switch control module by the DPCD information in display and after EDID information is written in all AUX proxy modules, by institute
There is the HPD signal of host to set height.
By using above-mentioned technical proposal, HPD signal is hot plug indication signal, and HPD signal is for display
Output, for notifying host to have display insertion, HPD signal is input for host, and when HPD is high, host is known
There is display connection.HPD control module and information reading/switch control module cooperating, when device power, HPD controls mould
Block sets low the HPD signal of All hosts, after the completion of the DPCD information of AUX proxy module and the write-in of EDID information, HPD control
The HPD signal of All hosts is set height by module, and notice host can carry out AUX communication.At this point, selected host A UX and aobvious
Show device direct communication, remaining not selected host A UX is communicated with AUX proxy module.When HPD control module is by All hosts
After HPD signal all sets height, all hosts can be normally carried out AUX communication, it is not necessary to which display is switched on host
The initialization for completing video card, effectively increases working efficiency.
The present invention is further arranged to: switching key is provided on the control panel, the switching key is used for information
The switching signal in reading/switch control module transmission switching KVM switcher channel.
By using above-mentioned technical proposal, switches switch module and controlled by switching signal S0S1, when S0S1 chooses some
When port, host and the display of the port are connected directly, and the host that do not choose is connected with corresponding AUX proxy module, tool
There is the effect for facilitating switching host.
The present invention is further arranged to: the switching signal of the switching key transmission is binary digital signal.
By using above-mentioned technical proposal, binary digital signal has strong antijamming capability, convenient for storage, processing and friendship
The advantages that changing, by taking 4 hosts as an example, S0S1 can be with 00,01,10 or 11.As S0S1=00, selection is switched to the 1st host；
As S0S1=01, selection is switched to the 2nd host；As S0S1=10, selection is switched to the 3rd host；As S0S1=11,
Selection is switched to the 4th host.
Foregoing invention purpose two of the invention has the technical scheme that
A kind of AUX auto-answer method of KVM switcher, comprising the following steps:
Step S1 increases an automatic answering device based on FPGA on the basis of KVM switcher；
Step S2 builds an AUX read module, multiple AUX agency and multiple switchings switch inside FPGA, and connects FPGA
Connect a switching key module；
Step S3, when automatic answering device powers on, AUX read module by AUX bus by display DPCD information and
EDID information reads and is written in all AUX agencies；
Step S4, AUX read module controls each switching switching operations according to the switching signal of switching key module transfer, make by
It chooses the AUX bus of host to be connected with the AUX bus of display, acts on behalf of the AUX bus for not being selected host with corresponding AUX
It is connected and is communicated.
By using above-mentioned technical proposal, it is only necessary to increase by one on the basis of existing DisplayPort type KVM switcher
A AUX automatic answering device based on FPGA, the AUX agency in host-initiated in FPGA interact with host completion automatically, ring
The read-write operation of host is answered, helps host to smoothly complete video card initialization, solving host cannot in no display
The problem of normal starting, have the effect of that the ease for use of DisplayPort type KVM switcher can be effectively improved.
The present invention is further arranged to: the step S3 includes following sub-step:
Step S31, when automatic answering device powers on, AUX read module sets low the HPD signal of All hosts；
Step S32, AUX read module by AUX bus by display DPCD information and EDID information read and be written to
In all AUX agencies；
The HPD signal of All hosts is set height by step S33, AUX read module, notifies corresponding host that can carry out AUX communication.
The present invention is further arranged to: the switching signal of switching key module transfer is binary digit in the step S4
Signal.
By using above-mentioned technical proposal, on startup, AUX read module first will be in display for automatic answering device
DPCD information and EDID information are read out, and these information are written in all AUX agencies, and then AUX read module enters
Off-line state.When host-initiated, the host not connecting with display can be acted on behalf of with AUX to be communicated, and is obtained from AUX agency
DPCD the and EDID information of display does not need for display to be switched to the initialization that can normally complete video card on host, has
Effect improves work efficiency.
In conclusion advantageous effects of the invention are as follows:
1. passing through the setting of FPGA module and control panel, the easy-to-use of DisplayPort type KVM switcher can be effectively improved by having
The effect of property；
2. having can guarantee own by switching switch, HPD control module and the setting of information reading/switch control module
Host can normally complete the initialization of video card, effective effect for improving working efficiency.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the AUX automatic answering device of the KVM switcher shown in the embodiment of the present invention one；
Fig. 2 is the flow chart of the AUX auto-answer method of the KVM switcher shown in the embodiment of the present invention two；
Fig. 3 is the flow chart of step S3 in the embodiment of the present invention two；
Fig. 4 is in the embodiment of the present invention two for embodying the flow chart of the FPGA course of work.
In figure, 10, control panel；11, switching key；20, FPGA module；21, AUX proxy module；22, switch switching molding
Block；23, AUX reader；24, information reading/switch control module；25, HPD control module；30, display；40, host.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment one
It referring to Fig.1, is a kind of AUX automatic answering device of KVM switcher disclosed by the invention, KVM switcher is connected with one
Display 30 and several hosts 40, AUX automatic answering device include control panel 10 and FPGA module 20.Control panel 10 for pair
The channel of KVM switcher switches over, and controls display 30 and be connected with the host 40 on the channel being switched to.FPGA module 20
It is acted on behalf of for fictionalizing multiple display AUX, and for distributing a void automatically when host 40 is not connect with display 30
Quasi- display AUX agency is connected with the host 40.It should be noted that the technical solution of the application is also applied for using removing
The case where other programming devices (such as PLD, CPLD, single-chip microcontroller, microprocessor etc.) Lai Shixian other than FPGA.
Referring to Fig.1, in the present embodiment, host 40 is provided with 4, i.e., virtual display AUX agency also has 4.
When First host 40 is connected with display 30, remaining 3 host 40 is connected with corresponding display AUX agency.Display
AUX agency is responsible for being communicated with the video card of corresponding host 40, receives the read-write operation of the host 40, and reply the host 40
Inquiry, so that the host 40 be helped to smoothly complete the initialization of video card.It should be noted that AUX automatic answering device can be with KVM
Other parts in switch are made on the same circuit board, can also be used as an independent circuit board module.
Although the application scenarios of the application are introduced by taking 4 hosts 40 as an example in the application, art technology
Personnel are appreciated that the technical solution of the application is suitable for a variety of different scenes, such as 2 hosts, 40,8 hosts 40, this
Application is not especially limited this.
Referring to Fig.1, FPGA module 20 includes that 23,4 AUX proxy modules 21 and 4 of AUX reader switch switch module
22,4 display AUX agencies are virtually formed by corresponding AUX proxy module 21 respectively.Switch switch module 22 and AUX is acted on behalf of
Module 21, which corresponds, to be connected, for controlling the connection status between AUX proxy module 21 and corresponding host 40.Wherein, when certain
When one host 40 is directly connected with display 30 by switching switch module 22, remaining 3 host 40 acts on behalf of mould with corresponding AUX
Block 21 is connected.AUX reader 23 is used for the DPCD information and the reading of EDID information in display 30, and these information are written
It (is written in corresponding display AUX agency) into all AUX proxy modules 21.When host 40 and corresponding display
When AUX agency is connected, which obtains the DPCD information and EDID letter of display 30 from current display AUX agency
Breath, to normally complete the initialization of 40 video card of host.
It should be noted that in this application, the technical solution for specifically introducing the application is carried out by taking AUX reader 23 as an example,
It will be recognized to those skilled in the art that the technical solution of the application applies also for not including AUX reader 23, will directly show
Show the case where DPCD information of device 30 and EDID information write-in display AUX are acted on behalf of.
Referring to Fig.1, AUX reader 23 includes information reading/switch control module 24 and HPD control module 25, HPD control
Module 25 is connected with information reading/switch control module 24.DPCD information and EDID information in display 30 reads by information/
Switch control module 24 reads and is written in all AUX proxy modules 21, and information reading/switch control module 24 is also used to
Running according to control panel 10 to the selection control switching switch module 22 in the channel of KVM switcher.HPD control module 25 also with
4 hosts 40 are connected, and when AUX automatic answering device powers on, HPD control module 25 sets low the HPD signal of All hosts 40；
When information reading/switch control module 24 by display 30 DPCD information and EDID information be written to all AUX and act on behalf of
After in module 21, the HPD signal of All hosts 40 is set height by HPD control module 25.It should be noted that HPD signal is that heat is inserted
Indication signal is pulled out, for display 30, HPD signal is output, for notifying host 40 to have the insertion of display 30, for master
For machine 40, HPD signal is input, and when HPD signal is high, host 40, which is known, the access of display 30.
Referring to Fig.1, switching key 11 is provided on control panel 10, switching key 11 is used for information reading/switch control
The switching signal in the channel of the transmission switching KVM switcher of module 24, by the switching signal, FPGA module 20 is it is known that user
Which keyboard, mouse and display 30 is wanted to be connected with the host 40 on channel.Preferably, in order to simplify complexity,
FPGA module 20 can be allowed directly to receive the switching signal that switching key 11 issues.It should be noted that in the present embodiment, cutting
The switching signal for changing the transmission of key 11 is binary digital signal S0S1, and as S0S1=00, selection is switched to the 1st host 40；
As S0S1=01, selection is switched to the 2nd host 40；As S0S1=10, selection is switched to the 3rd host 40；When S0S1=11
When, selection is switched to the 4th host 40.When the quantity of host 40 is greater than 4, the switching signal that switching key 11 transmits can be with
For the multidigit binary digital signal greater than two.
The implementation principle of above-described embodiment are as follows:
When AUX automatic answering device powers on, information reading/switch control module 24 will be in display 30 by AUX bus
DPCD information and EDID information read in FPGA module 20, and are written into 4 AUX proxy modules 21.Write-in is completed
Afterwards, information reading/switch control module 24 switches the running of switch module 22 according to the selection control of switching key 11.When selected
When the AUX bus of middle host 40 is directly connected with the AUX bus of display 30, the AUX of remaining 3 not selected hosts 40 is total
Line is connected with corresponding AUX proxy module 21.
Wherein, HPD control module 25 and information reading/24 cooperating of switch control module, when AUX automatic answering device
When powering on, HPD control module 25 sets low the HPD signal of All hosts 40, after the completion of the AUX of AUX proxy module 21 write-in,
The HPD signal of All hosts 40 is set height by HPD control module 25, and notice host 40 can carry out AUX communication.At this point, being switched
The host 40 and 30 direct communication of display that key 11 is chosen, remaining 3 not selected hosts 40 act on behalf of mould with corresponding AUX
Block 21 communicates.By the technical solution of the application, all hosts 40 can normally AUX be communicated, and complete the initialization of video card,
Solve the problems, such as that host 40 cannot normally start at no display 30.
Embodiment two
It is a kind of AUX auto-answer method of KVM switcher disclosed by the invention referring to Fig. 2, comprising the following steps:
Step S1 increases an automatic answering device based on FPGA on the basis of KVM switcher；
It should be noted that automatic answering device be also applied for using in addition to FPGA other programming devices (such as PLD,
CPLD, single-chip microcontroller, microprocessor etc.) Lai Shixian the case where.
Step S2 builds an AUX read module, multiple AUX agency and multiple switchings switch inside FPGA, and makes
One switching key module of FPGA connection；
Wherein, switching switch connects one to one with AUX agency, is connected for controlling corresponding host with corresponding AUX agency
Or it is connected directly with display；
Step S3, when automatic answering device powers on, AUX read module by AUX bus by display DPCD information and
EDID information reads and is written in all AUX agencies；
Specifically, the host obtains display from current AUX agency when host is connected with corresponding AUX agency
DPCD information and EDID information, to normally complete the initialization of the host video card；
Step S4, AUX read module controls each switching switching operations according to the switching signal of switching key module transfer, make by
It chooses the AUX bus of host to be connected with the AUX bus of display, acts on behalf of the AUX bus for not being selected host with corresponding AUX
It is connected and is communicated.
It should be noted that switching key module is used to transmit the switching signal in the channel of switching KVM switcher to FPGA,
By the switching signal, FPGA is known that user wants keyboard, mouse and display and the host phase on which channel
Even.In the present embodiment, by taking 4 hosts as an example, the switching signal of switching key module transfer is binary digital signal S0S1,
As S0S1=00, selection is switched to the 1st host；As S0S1=01, selection is switched to the 2nd host；As S0S1=10,
Selection is switched to the 3rd host；As S0S1=11, selection is switched to the 4th host；When host number is greater than 4, switching
The switching signal of key module transmission can be the multidigit binary digital signal greater than two.
Referring to Fig. 3, step S3 includes following sub-step:
Step S31, when automatic answering device powers on, AUX read module sets low the HPD signal of All hosts；
Step S32, AUX read module by AUX bus by display DPCD information and EDID information read and be written to
In all AUX agencies；
The HPD signal of All hosts is set height by step S33, AUX read module, notifies corresponding host that can carry out AUX communication.
It should be noted that AUX read module is connected with all hosts, HPD signal is hot plug indication signal, for
For display, HPD signal is output, for notifying host to have display insertion；For host, HPD signal is input,
When HPD signal is high, host, which is known, display access.
Referring to Fig. 4, the workflow after being powered on it illustrates the automatic answering device based on FPGA.After FPGA initialization,
FPGA can read the EDID information and DPCD information of display, and during which, FPGA judges the EDID information and DPCD letter of display
Whether breath reads completion.By taking 4 displays as an example, if the DPCD information and EDID information in FPGA reading display are completed,
These information are then written to AUX agency 1, AUX acts on behalf of 2, AUX and acts on behalf of in 3 and AUX agency 4；If unread completion, FPGA
Continue to read the EDID information and DPCD information in display.Further, by taking AUX agency 1 as an example, if judging AUX agency's 1
DPCD information and EDID information have been written into completion, then judge that switching key module selects whether to work as prosopyle；If judging AUX generation
Completion is not written for the DPCD information and EDID information of reason 1, then continues to act on behalf of 1 write-in DPCD information and EDID information to AUX.AUX
After the completion of DPCD information and EDID the information write-in of agency 1, if the selection of switching key module is to work as prosopyle, control corresponding
Switch switching operations, current hosts is made to be connected with display (i.e. AUX1 connects AUX0)；If the selection of switching key module is not worked as
Prosopyle then controls corresponding switching switching operations, so that current hosts is acted on behalf of 1 with AUX and is connected (i.e. AUX1 connects AUX agency 1).
The implementation principle of above-described embodiment are as follows:
Automatic answering device in method is mainly switched several parts and is formed by FPGA by AUX agency, AUX read module, switching.When
When automatic answering device powers on, AUX read module passes through AUX bus for the DPCD information and the reading of EDID information in display
FPGA, and be written into all AUX agencies.After the completion of write-in, AUX read module is according to switching key module
The running of selection control switching switch.When the AUX bus of selected host is directly connected with the AUX bus of display, remaining
The AUX bus of not selected host is connected with corresponding AUX agency.
When automatic answering device powers on, AUX read module sets low the HPD signal of All hosts, to AUX agency's
After the completion of AUX write-in, the HPD signal of All hosts is set height by AUX read module, and notice host can carry out AUX communication.This
When, it is switched the host and display direct communication that key module is chosen, remaining not selected host is acted on behalf of with corresponding AUX
Communication connection.By the technical solution of the application, all hosts can normally AUX be communicated, to complete the first of its video card
Beginningization solves the problems, such as that host cannot normally start in no display.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (9)
1. a kind of AUX automatic answering device of KVM switcher characterized by comprising
Control panel (10) is used to switch over the channel of KVM switcher, and the channel for controlling display (30) and being switched to
On host (40) be connected；
FPGA module (20) is used to fictionalize multiple display AUX agency, be also used to when host (40) not with display
(30) when connecting, the virtual display AUX agency of automatic distribution one is connected with the host (40)；
Wherein, the display AUX agency with the video card of corresponding host (40) for being communicated and being made the aobvious of the host (40)
Card is correctly completed initialization procedure.
2. a kind of AUX automatic answering device of KVM switcher according to claim 1, which is characterized in that the FPGA mould
Block (20) includes:
Multiple AUX proxy modules (21), the display AUX agency are virtually formed by corresponding AUX proxy module (21)；
Multiple switching switch modules (22), the switching switch module (22) is corresponding with AUX proxy module (21) to be connected, for controlling
Make the connection status between the AUX proxy module (21) and corresponding host (40)；
AUX reader (23), be used for by the display (30) DPCD information and EDID information read and be written to institute
In some AUX proxy modules (21).
3. a kind of AUX automatic answering device of KVM switcher according to claim 2, which is characterized in that the AUX is read
Taking device (23) includes information reading/switch control module (24), the DPCD information and EDID information in the display (30) by
Information reading/switch control module (24) reads and is written in all AUX proxy modules (21)；The information reads/opens
Control module (24) are closed to be also used to switch switch module (22) to the selection control in the channel of KVM switcher according to control panel (10)
Running.
4. a kind of AUX automatic answering device of KVM switcher according to claim 3, which is characterized in that the AUX is read
Taking device (23) further includes HPD control module (25)；The HPD control module (25) is used for when AUX automatic answering device powers on,
The HPD signal of All hosts (40) is set low；The HPD control module (25) is also used to when information reading/switch control module
(24) by the DPCD information in display (30) and after EDID information is written in all AUX proxy modules (21), will own
The HPD signal of host (40) sets height.
5. a kind of AUX automatic answering device of KVM switcher according to claim 3 or 4, it is characterised in that: the control
It is provided in making sheet (10) switching key (11), the switching key (11) is used for information reading/switch control module (24)
The switching signal in the channel of transmission switching KVM switcher.
6. a kind of AUX automatic answering device of KVM switcher according to claim 5, it is characterised in that: the switching is pressed
The switching signal of key transmission is binary digital signal.
7. a kind of AUX auto-answer method of KVM switcher, which comprises the following steps:
Step S1 increases an automatic answering device based on FPGA on the basis of KVM switcher；
Step S2 builds an AUX read module, multiple AUX agency and multiple switchings switch inside FPGA, and connects FPGA
Connect a switching key module；
Step S3, when automatic answering device powers on, AUX read module by AUX bus by display DPCD information and
EDID information reads and is written in all AUX agencies；
Step S4, AUX read module controls each switching switching operations according to the switching signal of switching key module transfer, make by
It chooses the AUX bus of host to be connected with the AUX bus of display, acts on behalf of the AUX bus for not being selected host with corresponding AUX
It is connected and is communicated.
8. a kind of AUX auto-answer method of KVM switcher according to claim 7, which is characterized in that the step S3
Including following sub-step:
Step S31, when automatic answering device powers on, AUX read module sets low the HPD signal of All hosts；
Step S32, AUX read module by AUX bus by display DPCD information and EDID information read and be written to
In all AUX agencies；
The HPD signal of All hosts is set height by step S33, AUX read module, notifies corresponding host that can carry out AUX communication.
9. a kind of AUX auto-answer method of KVM switcher according to claim 7, which is characterized in that the step S4
The switching signal of middle switching key module transfer is binary digital signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN111796755A (en) * | 2020-07-03 | 2020-10-20 | 深圳市创新胜为科技有限公司 | KVM control system and KVM display switching control method |
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