CN109918320A - A kind of control method of USB device, device and KVM control system - Google Patents
A kind of control method of USB device, device and KVM control system Download PDFInfo
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Abstract
This application provides a kind of control method of USB device, device and KVM control systems, wherein this method comprises: judging whether target general-purpose serial bus USB host is in abnormality；If so, generating enabled switching command；Start spare usb host according to enabled switching command to drive USB device.The embodiment of the present application is determining that target usb host is when in an abnormal state, can start spare usb host according to the enabled switching command of generation, so that spare usb host substitution target usb host drives USB device, to further realize human-computer interaction.
Description
Technical field
This application involves fields of communication technology, control in particular to a kind of control method of USB device, device and KVM
System processed.
Background technique
Universal serial bus (Universal Serial Bus, USB) equipment is as a kind of human-computer interaction device (Human
Interface Device, HID), have the characteristics that pluggable, data transmission is reliable, extension is convenient, low cost, it has also become when
The peripheral hardware of preceding electronic equipment indispensability.Such as mouse, keyboard, game paddle etc. are common USB devices.
In order to realize human-computer interaction, USB device needs to establish data chain by USB packet handing module and usb host
It after being successfully driven USB device, is monitored so that usb host can drive USB device by the data transmission link of foundation on road
Terminal can respond user by the data transmission link that above-mentioned USB packet handing module and USB device are established and pass through the USB
The operational order that equipment issues.
Once the data transmission link between USB device and usb host will be among however, usb host is abnormal
It is disconnected, lead to not drive USB device, to influence human-computer interaction.
Summary of the invention
In view of this, a kind of control method for being designed to provide USB device of the embodiment of the present application, device and KVM control
System processed, it can be ensured that USB device is driven normally, and realizes human-computer interaction.
In a first aspect, the embodiment of the present application provides a kind of control method of USB device, wherein include:
Judge whether target general-purpose serial bus USB host is in abnormality；
If so, generating enabled switching command；
Start spare usb host according to the enabled switching command to drive USB device.
With reference to first aspect, the embodiment of the present application provides the first possible embodiment of first aspect, wherein institute
It states and USB device is driven according to the enabled switching command starting spare usb host, comprising:
The enumeration request that the spare usb host is sent according to the enabled switching command is received, and described enumerate is asked
It asks and is sent to the USB device；
It receives the USB device and responds the device attribute information that the enumeration request of the spare usb host returns；
The device attribute information is sent to the spare usb host, so that the spare usb host is to the USB
Equipment is driven.
The possible embodiment of with reference to first aspect the first, the embodiment of the present application provide second of first aspect
Possible embodiment, wherein judge whether target usb host is in abnormality, comprising:
After determining that the target usb host executes initialization operation, enumerating for the target usb host transmission is received
Request, and the enumeration request is transmitted to the USB device；
It receives the USB device and responds the device attribute information that the enumeration request returns, and the device attribute is believed
Breath is back to the target usb host；
Judge whether the number of the device attribute information matches with predetermined number；
If it is not, judging whether receive the enumeration request that the target usb host is sent again in preset duration；
If it is not, then the determining target usb host is in abnormality.
With reference to first aspect, the embodiment of the present application provides the third possible embodiment of first aspect, wherein sentences
Whether disconnected target usb host is in abnormality, comprising:
Judge whether receive the timing data packet that the target usb host is sent in preset time point；
If not, it is determined that the target usb host is in abnormality.
With reference to first aspect, the embodiment of the present application provides the 4th kind of possible embodiment of first aspect, wherein institute
Stating spare usb host includes virtual USB host and other usb hosts in addition to the target usb host；Make according to
Before the spare usb host of energy switching command starting drives USB device, further includes:
Obtain the priority of the virtual USB host and other usb hosts in addition to the target usb host；
It is described that USB device is driven according to the enabled switching command starting spare usb host, comprising:
Start the virtual USB host and other in addition to the target usb host according to the enabled switching command
The host of the highest priority of usb host drives USB device.
With reference to first aspect, the embodiment of the present application provides the 5th kind of possible embodiment of first aspect, wherein also
Include:
Receive the reset signal that the target usb host is sent；
According to the reset signal, enabled reset instruction is generated；
Start target usb host according to the enabled reset instruction, to drive USB device by target usb host.
Second aspect, the embodiment of the present application also provides a kind of control devices of USB device, wherein includes:
Judgment module, for judging whether target general-purpose serial bus USB host is in abnormality；
Generation module generates enabled switching command if being in abnormality for the target usb host；
Control module drives USB device for starting spare usb host according to the enabled switching command.
In conjunction with second aspect, the embodiment of the present application provides the first possible embodiment of second aspect, wherein institute
Control module is stated, is specifically used for:
The enumeration request that the spare usb host is sent according to the enabled switching command is received, and described enumerate is asked
It asks and is sent to USB device；
It receives the USB device and responds the device attribute information that the enumeration request of the spare usb host returns；
The device attribute information is sent to the spare usb host, so that the spare usb host is to the USB
Equipment is driven.
The third aspect, the embodiment of the present application also provides a kind of centralization KVM control systems, wherein including multiple main frames,
KVM signal switching apparatus, KVM attend a banquet end, USB device, wherein the multiple host is connected with the KVM signal switching apparatus
It connects, the KVM signal switching apparatus and the USB device end of attending a banquet with the KVM are connected；
The KVM, which attends a banquet, holds judgement currently to drive whether the host of the USB device is in abnormality, and should determining
It currently drives the host of the USB device when in an abnormal state, generates enabled switching command, and by the enabled switching command
It is transmitted to the KVM signal switching apparatus；
The multiple host is carried out enabled switching according to the enabled switching command by the KVM signal switching apparatus, with
So that the USB device is driven.
Fourth aspect, the embodiment of the present application also provides a kind of distribution KVM control systems, wherein including multiple main frames,
The corresponding KVM signalling terminals of each host, KVM reception signal terminal, USB device, wherein each host is corresponding
KVM signalling terminals are connected with the KVM reception signal terminal, the KVM reception signal terminal and the USB device phase
Connection；
KVM reception signal terminal judgement currently drives the host of the USB device whether to be in abnormality, and
The determining host for deserving the preceding driving USB device is when in an abnormal state, generates enabled switching command, and enable to cut by described
It changes instruction and is transmitted to the corresponding KVM signalling terminals of each host；
The corresponding KVM signalling terminals of each host according to the enabled switching command by the multiple host into
Enforcement can switch, so that the USB device is driven.
Control method, device and the KVM control system of a kind of USB device provided by the embodiments of the present application, wherein this method
It include: to judge whether target general-purpose serial bus USB host is in abnormality；If so, generating enabled switching command；According to
Enabled switching command starts spare usb host and drives to USB device.The embodiment of the present application is determining at target usb host
When abnormality, spare usb host can be started according to the enabled switching command of generation, so that spare usb host substitutes
Target usb host drives USB device, to further realize human-computer interaction.
To enable the above objects, features, and advantages of the application to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows a kind of flow chart of the control method of USB device provided by the embodiment of the present application one；
Fig. 2 shows the flow charts of the control method of another kind USB device provided by the embodiment of the present application one；
Fig. 3 shows the flow chart of the control method of another kind USB device provided by the embodiment of the present application one；
Fig. 4 shows the flow chart of the control method of another kind USB device provided by the embodiment of the present application one；
Fig. 5 shows the flow chart of the control method of another kind USB device provided by the embodiment of the present application one；
Fig. 6 shows a kind of structural schematic diagram of centralization KVM control system provided by the embodiment of the present application two；
Fig. 7 shows a kind of structural schematic diagram of distribution KVM control system provided by the embodiment of the present application three；
Fig. 8 shows a kind of structural schematic diagram of the control device of USB device provided by the embodiment of the present application four；
Fig. 9 shows the structural schematic diagram of electronic equipment provided by the embodiment of the present application five.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
Middle attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only
It is some embodiments of the present application, instead of all the embodiments.The application being usually described and illustrated herein in the accompanying drawings is real
The component for applying example can be arranged and be designed with a variety of different configurations.Therefore, below to the application's provided in the accompanying drawings
The detailed description of embodiment is not intended to limit claimed scope of the present application, but is merely representative of the selected reality of the application
Apply example.Based on embodiments herein, those skilled in the art institute obtained without making creative work
There are other embodiments, shall fall in the protection scope of this application.
Currently, USB device needs to establish data transmission link by USB packet handing module and target usb host, so that mesh
Mark usb host can drive USB device that can utilize structure after being successfully driven USB device by the data transmission link of foundation
The data transmission link built executes richer control program, such as to the business datum that USB device is formed in interactive operation
Execute transparent transmission function.Once the data between USB device and target usb host are transmitted however, target usb host is abnormal
Link will interrupt therewith, lead to not drive USB device, to influence human-computer interaction.In view of the above-mentioned problems, the embodiment of the present application
Control method, device and the KVM control system of a kind of USB device provided, it can be ensured that USB device is driven normally, and is realized
Human-computer interaction.
For convenient for understanding the embodiment of the present application, first to a kind of USB device disclosed in the embodiment of the present application
Control method describes in detail.Specifically, embodiment one is introduced using USB packet handing module as executing subject.
Embodiment one
As shown in Figure 1, being the embodiment of the present application using USB packet handing module as the control method of the USB device of executing subject
Flow chart, the specific steps are as follows:
S101, judge whether target general-purpose serial bus USB host is in abnormality.
In specific implementation, in target universal serial bus (Universal Serial Bus, USB) host normal driving
In the case where USB device, user can be transmitted to monitoring eventually by the operational order that USB device issues by USB packet handing module
End, so that monitor terminal responds the operational order.
Here, USB packet handing module can be with the working condition of real-time judge target usb host, and is determining target USB
Host is when in an abnormal state, ensures that USB can be driven normally, using method provided by the embodiments of the present application to realize people
Machine interaction, avoids USB device from losing because of the abnormal state of target usb host.
Specifically judge whether target usb host is in the method and step that abnormal method is referred to Fig. 2 and Fig. 3.
If S102, target usb host are in abnormality, enabled switching command is generated.
Here, it determines that target usb host is when in an abnormal state in USB packet handing module, enabled switching can be generated and refer to
It enables.Wherein, which can indicate that host and USB device in addition to target usb host form data chain
Road.
S103, USB device is driven according to enabled switching command starting spare usb host.
In specific implementation, spare usb host can be the virtual USB host constructed using fpga chip, can also be
Other usb hosts in addition to target usb host.
Enabled switching command is transmitted to spare usb host by USB packet handing module, and spare usb host is according to receiving
Enabled switching command is started, to realize the purpose for replacing target usb host driving USB device.
In keyboard-video-mouse (Keyboard Video Mouse, KVM) system, there can be virtual USB host and more
A entity usb host is attached simultaneously, according to before enabling the spare usb host of switching command starting, can be obtained in advance
The priority of virtual USB host and other usb hosts in addition to target usb host, then it is empty according to switching command starting is enabled
Quasi- usb host and and other usb hosts in addition to target usb host in the highest host of priority level.Wherein, in advance to void
Quasi- usb host and other usb hosts in addition to target usb host are provided with priority level, and priority level is highest as excellent
The host first selected drives USB device to replace target usb host.
Here, the priority level of virtual USB host and other usb hosts in addition to target usb host can be user
It is configured according to the device attribute information of virtual USB host and other usb hosts in addition to target usb host, may be used also
Being configured according to use demand.
The highest host of priority level in starting virtual USB host and other usb hosts in addition to target usb host
Later, if judging, the host is also at abnormality, starts the host that priority level is taken second place, and so on.
In specific implementation, the information that target usb host is in abnormality can also be transmitted to by USB packet handing module
Monitor terminal, monitor terminal generate enabled switching command, this can be enabled switching command according to the user's choice and be transmitted to use
The host of family selection, the host of starting user's selection.
Specifically, can come to start spare usb host to USB according to enabled switching command according to method as shown in Figure 2
Equipment is driven, the specific steps are as follows:
S201, the enumeration request that spare usb host is sent according to enabled switching command is received, and enumeration request is sent to
USB device.
In specific implementation, when each host and USB device establish data link for the first time, business datum biography is being carried out
Before defeated, host enumerates USB device.
In the embodiment of the present application, after enabled switching command is sent to spare usb host by USB packet handing module,
After determining that spare usb host executes initialization operation, receives spare usb host and enumerated according to what enabled switching command was sent
Request, and enumeration request is sent to USB device.
S202, the device attribute information that USB device responds the enumeration request return of spare usb host is received；
S203, device attribute information is sent to spare usb host, so that spare usb host drives USB device
It is dynamic.
In specific implementation, USB device is responded according to the enumeration request received, extracts asking in the enumeration request
Information is sought, and corresponding device attribute information is back to by USB packet handing module according to the solicited message in the enumeration request.Example
Such as, the solicited message in enumeration request may include request USB device feedback device type, out business men etc..
USB packet handing module receives the corresponding device attribute information of enumeration request of USB device return, and by the equipment
Attribute information is back to spare usb host.
Wherein, device attribute information may include descriptor, device type, the correlations such as transport-type for going out business men, support
Information.
In the case where USB device is driven normally, USB packet handing module can make according to the practical interaction of USB device
With situation, the business data packet comprising operational order is pass-through to usb host or any spare usb host, so that its response should
Operational order executes corresponding operation, realizes human-computer interaction.
It is locating after being completed when sending enumeration request to USB device and to USB device enumeration due to target usb host
State it is different, therefore, can respectively to target usb host when USB device sends enumeration request with it is complete to USB device enumeration
Judged at target usb host later.In the embodiment of the present application, target USB master can be judged by following two method
Whether machine is in abnormality, next, being illustrated respectively to above two method.
The first:
As shown in figure 3, judging whether target usb host is in abnormal shape when executing initialization operation for target usb host
The method of state, wherein specific step is as follows:
S301, after determining that target usb host executes initialization operation, receive that target usb host sends enumerates and asks
It asks, and enumeration request is transmitted to USB device；
S302, the device attribute information that USB device response enumeration request returns is received, and device attribute information is back to
Target usb host；
S303, judge whether the number of device attribute information matches with predetermined number；
If the number and predetermined number of S304, device attribute information mismatch, judge whether receive in preset duration
The enumeration request that target usb host is sent again；
If S305, not receiving the enumeration request that target usb host is sent again in preset duration, it is determined that target
Usb host is in abnormality.
In specific implementation, after determining that target usb host executes initialization operation, USB packet handing module receives mesh
The enumeration request that usb host is sent is marked, and enumeration request is transmitted to USB device.And USB device response enumeration request is returned
Device attribute information be back to target usb host.
Here, target usb host realizes human-computer interaction according to the device attribute information of equipment come driving equipment.Wherein,
The predetermined number that the corresponding device attribute information of each USB device can be preset in USB packet handing module, in each USB
When device attribute information is back to USB packet handing module by equipment, equipment category that USB packet handing module can will have been received
The number of property information is matched with above-mentioned predetermined number, to judge whether target usb host sends enumeration request again.
When the number and predetermined number for determining device attribute information mismatch, it is determined that target usb host will be sent out again
Send enumeration request.USB packet handing module will judge whether to receive that target usb host sends again enumerates in preset duration
Request, if not receiving the enumeration request that target usb host is sent again in preset duration, it is determined that at target usb host
In abnormality.
Wherein, target usb host can send enumeration request at least once to USB device, and what is sent again enumerates
It requests the content of request and the content of the enumeration request request sent for the first time can be identical, is also possible to different.
Second:
As shown in figure 4, to judge the method whether target usb host is in abnormality, wherein specific step is as follows:
S401, judge whether receive the timing data packet of target usb host transmission in preset time point；
If S402, the timing data packet for not receiving the transmission of target usb host in preset time point, it is determined that target USB
Host is in abnormality.
In specific implementation, in target usb host execution initialization operation and during normal driving USB device,
Target usb host can be according to preset time point to USB packet handing module transmission timing data packet, to characterize target usb host
In normal condition.
Whether USB packet handing module real-time judge receives the timing data of target usb host transmission in preset time point
Packet, and when preset time point does not receive the timing data packet of target usb host transmission, determine that target usb host is in
Abnormality.
It is worth noting that during target usb host executes initialization operation, it both can be according to shown in Fig. 2
Method judges whether target usb host is in abnormality, can also judge target USB master according to method shown in Fig. 3
Whether machine is in abnormality.
In specific implementation, the factor for causing target usb host to be in abnormality includes the power-off of target usb host, even
Wiring interruption etc., user can help to repair, for example, powering on to target usb host, so that target usb host restores just
Normal state.
After target usb host restores normal condition, target usb host can be made according to method as shown in Figure 5
Continue normal driving USB device, wherein specific step is as follows:
S501, the reset signal that target usb host is sent is received；
S502, according to reset signal, generate enabled reset instruction；
S503, target usb host is started according to enabled reset instruction, to drive USB device by target usb host.
In the embodiment of the present application, after target usb host restores normal condition, reset signal can be generated, and should
Reset signal is sent to USB packet handing module, and USB packet handing module makes to be capable of resetting finger according to the reset signal generation received
It enables, and this is enabled into reset instruction and is transmitted to target usb host.
Target usb host is sent after receiving the enabled reset instruction, through USB packet handing module to USB device
Enumeration request, and then USB device is driven, and then interrupted driving of the spare usb host to usb host equipment.
It is worth noting that after target usb host restores normal condition, if the working condition of USB device is in low
Fast mode or Full-Speed mode, then target usb host directly can send enumeration request to USB device by USB packet handing module；
If the working condition of USB device is in high-speed mode, need to detect usb bus, detection device end etc., and usb bus is cut
It shifts to after high-speed mode, just enumeration request can be sent to USB device by USB packet handing module.
The embodiment of the present application generates enabled switching command after determining that target usb host is in abnormality, and starts
Spare usb host avoids target usb host in the prior art and is abnormal so that spare usb host drives USB device,
Data transmission link between USB device and usb host will interrupt therewith, lead to not drive USB device, to influence man-machine
Interactive problem can ensure that USB device is driven normally according to the method for the embodiment of the present application, realize human-computer interaction.
Embodiment two
The embodiment of the present application two provides a kind of centralization KVM control system, referring to Fig. 6, centralization KVM control system
System, including multiple main frames, KVM signal switching apparatus, KVM attend a banquet end, USB device, and plurality of host and KVM signal, which switch, to be set
Standby to be connected, KVM signal switching apparatus and USB device end of attending a banquet with KVM are connected；
KVM, which attends a banquet, holds whether the host of the current driving USB device of judgement is in abnormality, and deserves preceding driving in determination
The host of USB device is when in an abnormal state, generates enabled switching command, and enabled switching command is transmitted to KVM signal and is cut
Exchange device；
Multiple main frames are carried out enabled switching according to enabled switching command by KVM signal switching apparatus, so that USB device quilt
Driving.
It will be appreciated from fig. 6 that further including other in the centralization kvm system in addition to target usb host and virtual USB host
Usb host 1, other usb hosts 2 and other usb hosts 3.Target usb host, virtual USB host, other usb hosts 1, other
Usb host 2 and other usb hosts 3 are attached with KVM signal switching apparatus simultaneously, realize the operational order for receiving user, and
By the purpose of video signal transmission to display.In practical applications, it can be set according to actual needs in the centralization kvm system
The number of other usb hosts is set, the embodiment of the present application is not specifically limited in this embodiment.
KVM seat end namely USB packet handing module, the enumeration request that can be sent target usb host by hub
It is transmitted to USB mouse and USB storage device (USB mouse and USB storage device be one of USB device), and by USB
The device attribute information returned after mouse and USB storage device response enumeration request is back to target usb host, and then drives
USB mouse and USB storage device.
In specific implementation, after target usb host normal driving USB mouse and USB storage device, monitor terminal is
It can receive user and operational order sent by USB mouse, for example, vision signal is shown on display etc., and respond
The operational order.
Whether KVM seat end can be in abnormality with real-time judge target usb host, and determine target usb host
It is when in an abnormal state, according to the preferential of virtual USB host, other usb hosts 1, other usb hosts 2 and other usb hosts 3
Rank starts the highest host of priority level, and USB mouse and USB storage device are driven normally, and then monitors
Terminal can receive user and send operational order by USB mouse, realize the purpose of human-computer interaction.
Embodiment three
The embodiment of the present application three provides a kind of distribution KVM control system, referring to Fig. 7, distribution KVM control system
Including multiple main frames, the corresponding KVM signalling terminals of each host, KVM reception signal terminal, USB device, wherein each master
The corresponding KVM signalling terminals of machine are connected with KVM reception signal terminal, and KVM reception signal terminal is connected with USB device
It connects；
Whether the host of the current driving USB device of KVM reception signal terminal judgement is in abnormality, and deserves in determination
The host of preceding driving USB device is when in an abnormal state, generates enabled switching command, and enabled switching command is transmitted to each
The corresponding KVM signalling terminals of host；
Multiple main frames are carried out enabled switching according to enabled switching command by the corresponding KVM signalling terminals of each host,
So that USB device is driven.
In specific implementation, in distributed KVM control system, since host side and KVM seat end will usually be based on net
Network environment is distributed in strange land, therefore needs to arrange two USB packet processing on the data transmission link between each host and USB device
Module, for realizing by the conversion between data and light/network data, to meet the requirement of corresponding transport protocol.
As shown in Figure 7, specifically included in the distribution KVM control system target usb host and virtual USB host, other
Usb host 1 and other usb hosts 2, and target usb host is corresponding with KVM signalling terminals 1, other usb hosts 1 are corresponding with
KVM signalling terminals 2, other usb hosts 2 are corresponding with KVM signalling terminals 3, KVM signalling terminals 1, KVM signal
Terminal 2, KVM signalling terminals 3 are sent to communicate to connect by network-bus and KVM reception signal terminal.KVM signal receives
Terminal is connected with monitor terminal, USB device.It in practical applications, can be according to practical need in distribution KVM control system
The number that other usb hosts are set is sought, the embodiment of the present application is not specifically limited in this embodiment.
Here, KVM reception signal terminal namely namely USB packet handing module, can be by usb bus by target USB master
The enumeration request that machine is sent is transmitted to USB device, and USB device is responded to the device attribute information returned after enumeration request and is returned
To target usb host, and then drive USB device.
Whether KVM reception signal terminal can be in abnormality with real-time judge target usb host, and determine target
Usb host is when in an abnormal state, opens according to the priority level of virtual USB host, other usb hosts 1, other usb hosts 2
The dynamic highest host of priority level, is driven normally USB device, and then monitor terminal can receive user and pass through
USB device sends operational order, realizes the purpose of human-computer interaction.
Example IV
Based on the same inventive concept, the embodiment of the present application three additionally provides USB corresponding with the control method of USB device and sets
Standby control device, the principle solved the problems, such as due to the device in the embodiment of the present application and the above-mentioned USB device of the embodiment of the present application
Control method it is similar, therefore the implementation of device may refer to the implementation of method, and overlaps will not be repeated.
As shown in figure 8, the control device of USB device provided by a kind of embodiment of the application includes:
Judgment module 801, for judging whether target general-purpose serial bus USB host is in abnormality；
Generation module 802 generates enabled switching command if being in abnormality for target usb host；
Control module 803 drives USB device for starting spare usb host according to the enabled switching command.
In one embodiment, above-mentioned control module 803, is specifically used for:
After starting spare usb host according to the enabled switching command, the spare usb host is received according to
The enumeration request that enabled switching command is sent, and the enumeration request is sent to USB device；
It receives the USB device and responds the device attribute information that the enumeration request of the spare usb host returns；
The device attribute information is sent to the spare usb host, so that spare usb host carries out USB device
Driving.
In another embodiment, above-mentioned judgment module 801 is specifically used for:
After determining that target usb host executes initialization operation, the enumeration request that target usb host is sent is received, and
Enumeration request is transmitted to USB device；
The device attribute information that USB device response enumeration request returns is received, and device attribute information is back to target
Usb host；
Judge whether the number of device attribute information matches with predetermined number；
If it is not, judging whether receive the enumeration request that target usb host is sent again in preset duration；
If not, it is determined that target usb host is in abnormality.
In yet another embodiment, judgment module 801 is specifically used for:
Judge whether receive the timing data packet of target usb host transmission in preset time point；
If not, it is determined that target usb host is in abnormality.
In another embodiment, above-mentioned control module 803 is also used to:
Obtain the priority of the virtual USB host and other usb hosts in addition to the target usb host；
Start the virtual USB host and other in addition to the target usb host according to the enabled switching command
The host of the highest priority of usb host drives USB device.
In another embodiment, the control device of above-mentioned USB device further include:
Reseting module 804, the reset signal sent for receiving the target usb host；
According to the reset signal, enabled reset instruction is generated；
Start target usb host according to the enabled reset instruction, to drive USB device by target usb host.
Embodiment five
As shown in figure 9, being the structural schematic diagram of electronic equipment provided by the embodiments of the present application, comprising: processor 901 is deposited
Reservoir 902 and bus 903, the storage of memory 902 execute instruction, when electronic equipment operation, processor 901 and memory 902
Between communicated by bus 903, following processing is executed when machine readable instructions are executed by processor 901:
Judge whether target general-purpose serial bus USB host is in abnormality；
If so, generating enabled switching command；
Start spare usb host according to the enabled switching command to drive USB device.
Optionally, in the method that processor 901 executes, spare usb host pair is being started according to the enabled switching command
After USB device is driven, further includes:
The enumeration request that spare usb host is sent according to enabled switching command is received, and enumeration request is sent to USB and is set
It is standby；
It receives USB device and responds the device attribute information that the enumeration request of spare usb host returns；
Device attribute information is sent to spare usb host.
Optionally, in the method that processor 901 executes, judge whether target usb host is in abnormality, comprising:
After determining that target usb host executes initialization operation, the enumeration request that target usb host is sent is received, and
Enumeration request is transmitted to USB device；
The device attribute information that USB device response enumeration request returns is received, and device attribute information is back to target
Usb host；
Judge whether the number of device attribute information matches with predetermined number；
If it is not, judging whether receive the enumeration request that target usb host is sent again in preset duration；
If not, it is determined that target usb host is in abnormality.
Optionally, in the method that processor 901 executes, judge whether target usb host is in abnormality, comprising:
Judge whether receive the timing data packet of target usb host transmission in preset time point；
If not, it is determined that target usb host is in abnormality.
Optionally, in the method that processor 901 executes, the spare usb host includes virtual USB host and except the mesh
Mark other usb hosts except usb host；USB device is carried out starting spare usb host according to the enabled switching command
Before driving, further includes:
Obtain the priority of the virtual USB host and other usb hosts in addition to the target usb host；
It is described that USB device is driven according to the enabled switching command starting spare usb host, comprising:
Start the virtual USB host and other in addition to the target usb host according to the enabled switching command
The host of the highest priority of usb host drives USB device.
Optionally, the method that processor 901 executes further include:
Receive the reset signal that target usb host is sent；
According to reset signal, enabled reset instruction is generated；
Start target usb host according to enabled reset instruction, to drive USB device by target usb host.
The computer journey of a kind of control method of USB device, device provided by the embodiment of the present application and KVM control system
Sequence product, the computer readable storage medium including storing program code, before the instruction that program code includes can be used for execution
Method in the embodiment of the method for face, specific implementation can be found in embodiment of the method, and details are not described herein.
Specifically, which can be general storage medium, such as mobile disk, hard disk, on the storage medium
Computer program when being run, the control method of above-mentioned USB device is able to carry out, so as to determine target usb host
It is when in an abnormal state, spare usb host can be started according to the enabled switching command of generation, so that spare usb host replaces
USB device is driven for target usb host, to further realize human-computer interaction.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in the executable non-volatile computer-readable storage medium of a processor.Based on this understanding, the application
Technical solution substantially the part of the part that contributes to existing technology or the technical solution can be with software in other words
The form of product embodies, which is stored in a storage medium, including some instructions use so that
One computer equipment (can be personal computer, server or the network equipment etc.) executes each embodiment institute of the application
State all or part of the steps of method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (Read-Only
Memory, ROM), random access memory (Random Access Memory, RAM), magnetic or disk etc. is various to deposit
Store up the medium of program code.
Finally, it should be noted that embodiment described above, the only specific embodiment of the application, to illustrate the application
Technical solution, rather than its limitations, the protection scope of the application is not limited thereto, although with reference to the foregoing embodiments to this Shen
It please be described in detail, those skilled in the art should understand that: anyone skilled in the art
Within the technical scope of the present application, it can still modify to technical solution documented by previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of the embodiment of the present application technical solution, should all cover the protection in the application
Within the scope of.Therefore, the protection scope of the application shall be subject to the protection scope of the claim.
Claims (10)
1. a kind of control method of USB device characterized by comprising
Judge whether target general-purpose serial bus USB host is in abnormality；
If so, generating enabled switching command；
Start spare usb host according to the enabled switching command to drive USB device.
2. the method according to claim 1, wherein described start spare USB according to the enabled switching command
Host drives USB device, comprising:
The enumeration request that the spare usb host is sent according to the enabled switching command is received, and the enumeration request is sent out
It send to the USB device；
It receives the USB device and responds the device attribute information that the enumeration request of the spare usb host returns；
The device attribute information is sent to the spare usb host, so that the spare usb host is to the USB device
It is driven.
3. being wrapped the method according to claim 1, wherein judging whether target usb host is in abnormality
It includes:
After determining that the target usb host executes initialization operation, receives the enumerating for target usb host transmission and ask
It asks, and the enumeration request is transmitted to the USB device；
It receives the USB device and responds the device attribute information that the enumeration request returns, and the device attribute information is returned
It is back to the target usb host；
Judge whether the number of the device attribute information matches with predetermined number；
If it is not, judging whether receive the enumeration request that the target usb host is sent again in preset duration；
If not, it is determined that the target usb host is in abnormality.
4. being wrapped the method according to claim 1, wherein judging whether target usb host is in abnormality
It includes:
Judge whether receive the timing data packet that the target usb host is sent in preset time point；
If not, it is determined that the target usb host is in abnormality.
5. the method according to claim 1, wherein the spare usb host includes virtual USB host and except institute
State other usb hosts except target usb host；Starting spare usb host to USB device according to the enabled switching command
Before being driven, further includes:
Obtain the priority of the virtual USB host and other usb hosts in addition to the target usb host；
It is described that USB device is driven according to the enabled switching command starting spare usb host, comprising:
Start the virtual USB host and other USB masters in addition to the target usb host according to the enabled switching command
The host of the highest priority of machine drives USB device.
6. the method according to claim 1, wherein further include:
Receive the reset signal that the target usb host is sent；
According to the reset signal, enabled reset instruction is generated；
Start target usb host according to the enabled reset instruction, to drive USB device by target usb host.
7. a kind of control device of USB device characterized by comprising
Judgment module, for judging whether target general-purpose serial bus USB host is in abnormality；
Generation module generates enabled switching command if being in abnormality for the target usb host；
Control module drives USB device for starting spare usb host according to the enabled switching command.
8. device according to claim 7, which is characterized in that the control module is specifically used for:
The enumeration request that the spare usb host is sent according to the enabled switching command is received, and the enumeration request is sent out
It send to USB device；
It receives the USB device and responds the device attribute information that the enumeration request of the spare usb host returns；
The device attribute information is sent to the spare usb host, so that the spare usb host is to the USB device
It is driven.
9. a kind of centralization KVM control system, which is characterized in that attend a banquet including multiple main frames, KVM signal switching apparatus, KVM
End, USB device, wherein the multiple host is connected with the KVM signal switching apparatus, the KVM signal switching apparatus with
USB device end of attending a banquet with the KVM is connected；
The KVM, which attends a banquet, holds judgement currently to drive whether the host of the USB device is in abnormality, and is determining that this is current
It drives the host of the USB device when in an abnormal state, generates enabled switching command, and the enabled switching command is transmitted
To the KVM signal switching apparatus；
The multiple host is carried out enabled switching according to the enabled switching command by the KVM signal switching apparatus, so that
The USB device is driven.
10. a kind of distribution KVM control system, which is characterized in that including multiple main frames, the corresponding KVM signal hair of each host
It makes arrangements for his funeral end, KVM reception signal terminal, USB device, wherein the corresponding KVM signalling terminals of each host and the KVM
Reception signal terminal is connected, and the KVM reception signal terminal is connected with the USB device；
The KVM reception signal terminal judgement currently drives whether the host of the USB device is in abnormality, and in determination
The host of the driving USB device is when in an abnormal state before deserving, and generates enabled switching command, and the enabled switching is referred to
Order is transmitted to the corresponding KVM signalling terminals of each host；
The corresponding KVM signalling terminals of each host make the multiple host according to the enabled switching command
It can switch, so that the USB device is driven.
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