CN102081455B - Multicomputer switcher and adapter thereof - Google Patents
Multicomputer switcher and adapter thereof Download PDFInfo
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- CN102081455B CN102081455B CN 200910253105 CN200910253105A CN102081455B CN 102081455 B CN102081455 B CN 102081455B CN 200910253105 CN200910253105 CN 200910253105 CN 200910253105 A CN200910253105 A CN 200910253105A CN 102081455 B CN102081455 B CN 102081455B
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Abstract
The invention discloses a multicomputer switcher and an adapter thereof. The multicomputer switcher is provided with at least one adapter used for coupling the multicomputer switcher to a controlled computer. The adapter at least comprises an image conversion unit, a USB (Universal Serial Bus) concentrator, a first USB device controller and a second USB device controller, wherein the image conversion unit is used for converting single-ended image signals output by the controlled computer into differential image signals to be transmitted to the multicomputer switcher; and the first USB device controller and the second USB device controller respectively simulate different USB devices.
Description
Technical field
The present invention is about a kind of management system and method for KVM switch, particularly breakout box, management system and the method for a kind of utilization USB (universal serial bus) (Universal Serial Bus, USB) standard.
Background technology
KVM switch (Keyboard-Video-Mouse Switch) is available for users to many controlled computers of single group of control device management.
The KVM switch product that traditional KVM switch can be produced with reference to ATEN International (ATEN International) incorporated company, such as KM0432, KM0832 or KN4140 etc.In the KVM switch of this quasi-tradition, the breakout box of its certain model (adapter) has a USB connector, can be connected with the usb connecting port of controlled computer, in order to being sent to controlled computer from the USB mouse/keyboard signal of control device.Along with the demand of virtual media (Virtual media) increases gradually, in breakout box, also must additionally increase USB human-computer interface device the classification in addition function of other USB device classification, for example mass storage (Mass Storage Device) classification.
See also Fig. 1, in conventional art, breakout box with usb connecting port only has single USB Setup Controller (Device Controller) 60 usually, so when KVM switch wants to provide plural USB device to same controlled computer 90, this USB Setup Controller 60 with the controlled computer motherboard on 90 usb host controller 95 enumerate in the process of (enumeration) and must simulate plural USB " interface " (Interface) with the kenel of composite device (composite device).Yet, in the application in KVM field, such mode can cause different USB devices between remove or the connection meeting is disturbed each other.For example when a certain USB device (virtual media) 80 was coupled to controlled computer 90 again via KVM switch, this USB Setup Controller 60 also must re-start and enumerate.So will cause the temporary transient interruption of another USB device (keyboard/mouse) 70 and can't use, the user is brought inconvenience.
In addition, in conventional art, the USB composite device of this kind emulation also can cause the inefficacy of some function.Because according to usb protocol, single USB Setup Controller only can provide one group " device " to describe unit (DeviceDescriptor) to the usb host controller of controlled computer, and supplier's identification code (Vendor ID; VID) or product ID (Product ID; PID) be arranged in this " device " and describe unit, so controlled computer also can't be obtained supplier's identification code or product ID real more than two groups by single USB Setup Controller, and then can't select optimal driver to control a plurality of interfaces of this USB composite device, it will cause partial function to lose efficacy or plug and play (Plug-and-Play) function can't realize that the user is forced to and must comes install driver with manual mode.
The KVM breakout box product that the example of conventional adapter can further be produced with reference to Hongzheng Automation Science-Technology Co., Ltd, such as KA9170, KA7170, KA7176 etc., this type of breakout box has plastic casing usually, and includes processor chips/circuit and relevant firmware.About above-mentioned traditional KVM switch and the specification of breakout box, can obtain from the website (http://www.aten.com.tw) of Hongzheng Automation Science-Technology Co., Ltd, do not given unnecessary details at this.
Summary of the invention
An aspect of of the present present invention is to provide a kind of KVM switch, its breakout box that be used for to connect controlled computer use at least two independently USB Setup Controller (device control ler) carry out interaction with controlled computer.
Another aspect of the present invention is to provide a kind of computer switch, and its breakout box that is used for the connection controlled computer uses the above different USB description of at least two groups unit to carry out interaction with controlled computer simultaneously.Especially, different USB describes unit can have different VID (Vendor ID) and/or PID (Product ID), and controlled computer can according to from the received VID/PID of breakout box, activate respectively suitable driver.
In an embodiment of the present invention, comprise a KVM switch, one or more breakout box in the computer management system, and control device sees through KVM switch and a breakout box is coupled to a controlled computer.Breakout box is coupled to a controlled computer with KVM switch, further comprises: a video conversion unit, a usb hub, one the one USB Setup Controller and one the 2nd USB Setup Controller.The video conversion unit is converted to differential (differential) signal of video signal and is transferred into KVM switch in order to single-ended (single-ended) signal of video signal with controlled computer output.So controlled computer and computer switch and between distance just may extend to 300-1000 English Foot.
The one USB Setup Controller and the 2nd USB Setup Controller carry out communication via usb hub and controlled computer respectively.When a USB device is coupled to KVM switch, the one USB Setup Controller simulates a USB device to controlled computer, and when the 2nd USB device was coupled to KVM switch, the 2nd USB Setup Controller simulated the 2nd USB device to controlled computer.And when a USB device was removed, if the 2nd USB Setup Controller has been coupled to this controlled computer, then the 2nd USB Setup Controller need not re-start (Enumeration) process of enumerating; When the 2nd USB device was removed, if a USB Setup Controller has been coupled to this controlled computer, then a USB Setup Controller need not re-start (Enumeration) process of enumerating.More interconnect with a CAT-5 cable XIAN between each breakout box and the KVM switch.
A kind of method that control device is coupled to controlled computer in above-mentioned management system through KVM switch is also proposed in another embodiment, wherein comprise the following step: when coupling a USB device to KVM switch, with a USB Setup Controller controlled computer is simulated a USB device; When coupling the 2nd USB device to KVM switch, with the 2nd USB Setup Controller controlled computer is simulated the 2nd USB device; And by the video conversion unit the single-ended signal of video signal of controlled computer output is converted to differential signal of video signal, and be sent to KVM switch.
Narration by following preferred embodiment also cooperates description of drawings, and purpose of the present invention, feature ﹠ benefits will be more clear.
Description of drawings
Fig. 1 is the Organization Chart of the emulation USB composite device of conventional art;
Fig. 2 A is the Organization Chart of management system in the embodiment of the invention;
Fig. 2 B shows the Organization Chart of breakout box in the embodiment of the invention; And
Fig. 3 shows method flow diagram in the embodiment of the invention.
Embodiment
Fig. 2 A shows an embodiment of computer management system 10 of the present invention.This system 10 comprises many KVM switch 110, one or more breakout box 130, in order to couple one or many controlled computer equipment (for example personal computer, server or large-scale data main frame) 150.In addition, system 10 optionally comprises controls module (Console Module) 115 in one group, in order to connect one group of control device 170 (for example keyboard, screen and mouse), as USB mass storage (USB Mass Storage Device) 180 or the smart card card reading machine (smart card reader) 190 of virtual media.Interconnect with a CAT-5 cable XIAN between control module 115 and the KVM switch 110 in this.Or, in having this, under the framework of control module 115, can not be connected directly to this KVM switch 110 as USB mass storage 180 or the smart card card reading machine 190 of virtual media.
Or control device 170 can see through in one control computer (not shown) and a network (not shown) and KVM switch 110 and couple.Computer switch 110 in such cases is one to have the KVM switch (being commonly referred to KVM-Over-IP) of network interface, a performed supervisory routine makes supervisory computer carry out network communication with KVM switch 110 on the middle control computer, for example makes the keyboard/mouse signals of control device 170 outputs be converted into network package and be sent to KVM switch 110 via network.On the other hand, KVM switch 110 can will be converted to from the signal of video signal of controlled computer 150 network package by be sent to middle control computer by network.So, middle control computer just can be via network management KVM switch 110 and controlled computer 150.
The hardware structure of KVM switch product K M0432, the KM0832 that KVM switch 110 in the present embodiment can be produced based on Hongzheng Automation Science-Technology Co., Ltd or KN4140 etc. is implemented, but the present invention does not want to be confined to this.The management system 10 of the embodiment of the invention can comprise a plurality of KVM switch 110 with the controlled computer equipment 150 of more of connections in addition, and can daisy chain (Daisy Chain) between a plurality of KVM switch 110 be linked to increase the number of controlled computer with the mode of storehouse (Cascade), but in order to clearly demonstrate the present invention, only contain a KVM switch 110 and a controlled computer equipment 150 in following examples, ripe this skill person should know that the present invention does not want to be confined to this.
Fig. 2 B further shows an embodiment of breakout box 130 of the present invention.This breakout box also can be described as server interface module (Server Interface Module; SIM)." outward appearance " of breakout box 130, breakout box product K A9170, the KA7170 or the KA7176 that can similar Hongzheng Automation Science-Technology Co., Ltd produce.It has plastic casing 131, housing 131 has the connector 132 (for example RJ-45 connector) that joins with KVM switch 110, and at housing 131 outer the connector 133 that joins with controlled computer 150 is arranged in addition, and see through cable with and circuit (being specified in afterwards) in the housing 131 is connected.In one embodiment, connector 133 comprises a USB Type A connector and a HDB-15 connector, wherein USB Type A connector is mainly used to connect a certain usb connecting port of controlled computer, to transmit keyboard/mouse signals to controlled computer 150, but also can be used to transmit other digital signal (for example virtual media signal), the HDB-15 connector then is used for receiving the single-ended signal of video signal that controlled computer 150 is exported, in addition, connector 133 also can comprise for example one or more Ministereo plug, in order to transmit and/or to receive the sound signal of loudspeaker and microphone.
The one USB Setup Controller 135 and the 2nd USB Setup Controller 136 are connected to respectively two downstream ports of usb hub 134, and then carry out the relevant communication of USB through connector 133 with the usb host controller (not shown) of controlled computer 150.For instance, the usb hub that can produce with reference to TexasInstruments company of usb hub 134; The USB Setup Controller that 136 of the one USB Setup Controller 135 and the 2nd USB Setup Controllers can be produced with reference to Cypress Semiconductor company or NXP Semiconductors company, for example CY7C63732.Can be optionally and be familiar with this skill person, revise these at a piece of wood serving as a brake to halt a carriage body (firmware) of obtainable usb hub and USB Setup Controller on the market according to spirit of the present invention, realize usb hub 134 and the USB Setup Controller 135,136 of the embodiment of the invention.
In one embodiment, an above-mentioned USB device can be keyboard and the mouse in the control device 170, or other USB human-computer interface device (USB HID Device); And the 2nd USB device can be USB mass storage 180 or calculating punch 190.Preferably, the one USB device has different USB device classification (USB Device Class) from the 2nd USB device, but a USB device and the 2nd USB device still can be two generic USB devices, for example are two groups of above keyboard/mouse or the USB mass storage 180 of two different capabilities.And in a further embodiment, an above-mentioned USB device and the 2nd USB device are can be other USB devices such as printer, scanner, sound amplifier, microphone, and the present invention does not want to be limited.
It is worth mentioning that, in this embodiment, to describe unit (descriptors) be for one the one USB device and one the 2nd USB device (for example control device shown in Fig. 2 A 170, USB mass storage 180 or smart card card reading machine 190) that directly or indirectly couple with KVM switch 110 to the USB that keeps of a USB Setup Controller 135 and the 2nd USB Setup Controller 136 its firmwares.Wherein preferably, the VID (Vendor ID) and/or the PID (Product ID) that keep of a USB Setup Controller 135 and the 2nd USB Setup Controller 136 its firmwares is a USB device and the 2nd USB device that directly or indirectly couples corresponding to KVM switch 110.When a USB Setup Controller 135 and the 2nd USB Setup Controller 136 transmit the VID of the USB that represents a USB device and the 2nd USB device and/or PID to controlled computer 150 by its other unit describe unit (Device Descriptor) respectively, the usb host controller of controlled computer 150 and operating system can select respectively to be fit to the driver of a USB device and the 2nd USB device by this, and carry out corresponding application program to realize plug and play (Plug-and-Play).
By above-mentioned setting, although a USB device is not directly to be connected with a usb host controller (not icon) of controlled main frame 150 with the 2nd USB device, a USB Setup Controller 135 and the 2nd USB Setup Controller 136 can simulate respectively a USB device and the 2nd USB device (for example control device 170, USB mass storage 180 or smart card card reading machine 190) via enumerating the usb host controller of (Enumeration) process to controlled main frame 150.In other words, controlled computer 150 meetings " think " that control device 170, USB mass storage 180 or smart card card reading machine 190 directly are connected with it, and from different devices (being not a composite device), and " difference " activates corresponding driver or application program, and utilizes a USB Setup Controller 135 and the 2nd USB Setup Controller 136 end points (endpoint) separately to carry out data transmission.For example, mainly interrupt transmission (Interrupt transfer) between a USB Setup Controller 135 and the control main frame 150, and mainly carry out flood tide transmission (Bulk transfer) between the 2nd USB Setup Controller 1336 and the control main frame 150.Afterwards also can " difference " removal by control device 170, USB mass storage 180 or the smart card card reading machine 190 of a USB Setup Controller 135 and 136 emulation of the 2nd USB Setup Controller, and the removing/connect each other and can't interfere with each other of these different USB devices.For example, when a USB device removal, the 2nd USB device still can remain on the state of connection (attach).Again for example, when a USB device of emulation connected, the 2nd USB device still can remain on the state of connection.In other words, no matter a USB device removes or connects, and the 2nd USB device does not need to re-start enumeration process (vice versa) with controlled computer 150, so the user can not feel interruption and inconvenience on using.
It should be noted that, if aforementioned connector 133 has two USB Type A connectors, in order to connect the different usb connecting ports of controlled computer 150, then an aforementioned USB Setup Controller 135 and the 2nd USB Setup Controller 136 just can carry out communication with usb host controller via the USB Root Hub (Root Hub) of controlled computer 150, and the hub 134 in the middle of the breakout box 130 just can omit.
And the explanation of unit (descriptors) and PID/VID described about the interaction between USB Setup Controller and the usb host controller, USB device classification, end points, USB, can be referring to Universal Serial BusSpecification (Rev.1.1 or Rev.2.0) and Device Class Definition for Human InterfaceDevices (HID) (Version1.11), above-mentioned two files all can be obtained from http://www.usb.org download.
Processor 138 can for example be the microcontroller W90N740 of Winbond electronics, inc. made, and it couples respectively a USB Setup Controller 135 and the 2nd USB Setup Controller 136.In one embodiment, processor 138 is in order to be converted to the RS232 signal with a USB Setup Controller 135 or 136 receptions of the 2nd USB Setup Controller from the usb signal of controlled computer 150, and preferably, breakout box 130 can more comprise RS485 transceiver (transceiver) 139, in order to this RS232 signal (single-ended signal) is converted to RS485 signal (differential wave), and the RS485 signal is seen through connector 132 is sent to KVM switch 110.Its ADM485 that can Analog Devices company provides realizes.About the ins and outs of will exchange between RS232 signal/RS485 signal, can be with reference to http://www.airborn.com.au/layout/232cnv.html or http://www.rmv.com/rs232-rs485-cv_mi.htm.
Fig. 3 shows the process flow diagram of the inventive method embodiment, and cooperates the system 10 shown in Fig. 2 A and the breakout box 130 shown in Fig. 2 B that the present invention is described.In step 300, breakout box 130 is coupled respectively KVM switch 110 and controlled computer 150.
It should be noted that, after step 300, in this process flow diagram illustrated order not wish the present invention is caused restriction, the order of part step can exchange or carries out simultaneously.In step 302, control module 115 in control device (screen, keyboard, mouse) 170 utilizations is coupled to KVM switch 110, and 135 pairs of controlled computers 150 of a USB Setup Controller simulate keyboard/mouse 170, wherein a USB Setup Controller 135 one group of USB that will represent keyboard/mouse 170 describes unit's (comprising the messages such as VID and PID) and is sent to controlled computer 150, and controlled computer 150 is selected by this driver of suitable keyboard/mouse 170 or carried out corresponding application program.This USB describes unit and comprises at least " device " description unit (Device Descriptor), " configuration " description unit (Configuration Descriptor), " interface " description first (Interface Descriptor) and " end points " description unit (Endpoint Descriptor).Describe in the unit in this " configuration ", the value of bNumInterface field is 1 or 2.
In the step 304, control module 115 in USB mass storage 180 (or calculating punch 190) utilization is coupled to KVM switch 110, and 136 pairs of controlled computers 150 of the 2nd USB Setup Controller simulate USB mass storage 180 (or calculating punch 190), wherein the 2nd USB Setup Controller 136 one group of USB that will represent USB mass storage 180 (or calculating punch 190) describes unit's (comprising the messages such as VID and PID) and is sent to controlled computer 150, and controlled computer 150 is selected by this driver of suitable USB mass storage 180 (or calculating punch 190) or carried out corresponding application program.This USB describes unit and comprises at least " device " description unit (Device Descriptor), " configuration " description unit (Configuration Descriptor), " interface " description first (Interface Descriptor) and " end points " description unit (Endpoint Descriptor).Describe in the unit in this " configuration ", the value of bNumInterface field is 1.
In step 306, the single-ended signal of video signal of controlled computer 150 being exported by video conversion unit 137 is converted to differential signal of video signal, and make this differential signal of video signal be transferred into KVM switch 110, middle control module 115 or KVM switch 110 is reduced to single-ended signal of video signal with differential signal of video signal again is so that the screen in the control device 170 can show the image of controlled computer output.
Optionally, processor 137 is converted to the RS232 signal with a USB Setup Controller 135 or 136 receptions of the 2nd USB Setup Controller from the usb signal of controlled computer 150 in step 308, and in step 310, RS485 transceiver 139 is converted to the RS485 signal with the RS232 signal, and the RS485 signal is sent to KVM switch 110.
Although the present invention discloses as above with embodiment; so it is not to limit the present invention; any have a technical field of the invention usually know the knowledgeable; without departing from the spirit and scope of the present invention; when doing various changes and retouching; and can think to carry other different embodiment, so protection scope of the present invention is worked as with being as the criterion that claim was defined.
Claims (10)
1. breakout box, a KVM switch is connected to a controlled computer by this breakout box, and this KVM switch controlled by one group of control device, and this breakout box comprises at least:
One housing;
One video conversion unit is arranged in this housing, be converted to a differential signal of video signal in order to the single-ended signal of video signal with this controlled computer output, and this differential signal of video signal is transferred into this KVM switch;
One usb hub is arranged in this housing;
One the one USB Setup Controller is arranged in this housing, carries out communication via this usb hub and this controlled computer;
One the 2nd USB Setup Controller is arranged in this housing, carries out communication via this usb hub and this computing machine;
Wherein when one the one USB device is coupled to this KVM switch, the one USB Setup Controller simulates a USB device to this controlled computer, when one the 2nd USB device was coupled to this KVM switch, the 2nd USB Setup Controller simulated the 2nd USB device to this controlled computer.
2. breakout box as claimed in claim 1 is characterized in that, one group of USB that a USB Setup Controller more will represent a USB device describes unit and is sent to this controlled computer, with emulation the one USB device; And the 2nd USB Setup Controller more will represent a group of the 2nd USB device and describe unit and be sent to this controlled computer, with emulation the 2nd USB device.
3. breakout box as claimed in claim 1, it is characterized in that, VID and/or PID that the one USB Setup Controller more will represent a USB device are sent to this controlled computer, so that this controlled computer is suitable for the driver of a USB device according to this VID and/or PID selection one.
4. breakout box as claimed in claim 1, it is characterized in that, VID and/or PID that the 2nd USB Setup Controller more will represent the 2nd USB device are sent to this controlled computer, so that this controlled computer is suitable for the driver of the 2nd USB device according to this VID and/or PID selection one.
5. breakout box as claimed in claim 1 is characterized in that, a USB device has different USB device classifications from the 2nd USB device.
6. breakout box as claimed in claim 1 is characterized in that, a USB device is a USB human-computer interface device, and wherein the 2nd USB device is a USB mass storage or a smart card card reading machine.
7. breakout box as claimed in claim 1, it is characterized in that, when the 2nd USB device when this controlled computer removes, if a USB Setup Controller has been coupled to this controlled computer, then a USB Setup Controller need not re-start enumeration process.
8. breakout box as claimed in claim 1, it is characterized in that, when a USB device when this controlled computer removes, if the 2nd USB Setup Controller has been coupled to this controlled computer, then the 2nd USB Setup Controller need not re-start enumeration process.
9. computer management system comprises at least:
One KVM switch is coupled to a control device;
One breakout box, in order to this KVM switch is coupled to a controlled computer, this breakout box comprises more at least:
One video conversion unit is converted to a differential signal of video signal in order to the single-ended signal of video signal with this controlled computer output, and this differential signal of video signal is transferred into this KVM switch;
One usb hub;
One the one USB Setup Controller carries out communication via this usb hub and this controlled computer;
One the 2nd USB Setup Controller carries out communication via this usb hub and this controlled computer;
Wherein when one the one USB device is coupled to this KVM switch, the one USB Setup Controller simulates a USB device to this controlled computer, when one the 2nd USB device was coupled to this KVM switch, the 2nd USB Setup Controller simulated the 2nd USB device to this controlled computer.
10. one kind sees through the method that a KVM switch is coupled at least one controlled computer with one group of control device in a computer management system, this computer management system comprises this KVM switch and a breakout box is coupled to this controlled computer for this KVM switch, this breakout box comprise a video conversion unit, a usb hub, one the one USB Setup Controller, with one the 2nd USB Setup Controller, the method comprises the following step at least:
When (a) coupling one the one USB device to this KVM switch, and a USB Setup Controller simulates a USB device to this controlled computer;
When (b) coupling one the 2nd USB device to this KVM switch, and the 2nd USB Setup Controller simulates the 2nd USB device to this controlled computer; And
(c) a single-ended signal of video signal of by the video conversion unit this controlled computer being exported is converted to a differential signal of video signal, and transmits this differential signal of video signal to this KVM switch.
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| CN 200910253105 CN102081455B (en) | 2009-11-30 | 2009-11-30 | Multicomputer switcher and adapter thereof |
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| CN 200910253105 CN102081455B (en) | 2009-11-30 | 2009-11-30 | Multicomputer switcher and adapter thereof |
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| CN102081455A CN102081455A (en) | 2011-06-01 |
| CN102081455B true CN102081455B (en) | 2013-02-27 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI562564B (en) * | 2014-02-14 | 2016-12-11 | Aten Int Co Ltd | Method of logging in computers from remote end |
| CN106095123A (en) * | 2016-06-17 | 2016-11-09 | 山东超越数控电子有限公司 | A kind of method of KVM all-in-one virtual multichannel USB key Mus equipment |
| CN111583621B (en) * | 2019-02-19 | 2021-11-05 | 聪泰科技开发股份有限公司 | Remote control method |
| CN114124301B (en) * | 2021-11-17 | 2023-04-07 | 中国地质大学（武汉） | Virtual media transmission system with data check and error retransmission mechanism |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1459723A (en) * | 2002-05-24 | 2003-12-03 | 万国电脑股份有限公司 | Double interface switchover device of storage card |
| CN1601506A (en) * | 2004-09-30 | 2005-03-30 | 威盛电子股份有限公司 | USB control circuit having host mode and controlled mode switching function and its method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1459723A (en) * | 2002-05-24 | 2003-12-03 | 万国电脑股份有限公司 | Double interface switchover device of storage card |
| CN1601506A (en) * | 2004-09-30 | 2005-03-30 | 威盛电子股份有限公司 | USB control circuit having host mode and controlled mode switching function and its method |
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