CN1517871A - Multi computer switchover device - Google Patents
Multi computer switchover device Download PDFInfo
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- CN1517871A CN1517871A CNA031014798A CN03101479A CN1517871A CN 1517871 A CN1517871 A CN 1517871A CN A031014798 A CNA031014798 A CN A031014798A CN 03101479 A CN03101479 A CN 03101479A CN 1517871 A CN1517871 A CN 1517871A
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Abstract
A multi-computer switchover device for controlling more than one computer by a set of mouse and keyboard and connecting the computer controlled currently by said mouse and keyboard to a display via it is composed of the first and the second microprocessors for transmitting the data of mouse and keyboard to the third microprocessor, the third microprocessor for transmitting the commands of mouse and keyboard via the first and the second ones to currently controlled computer, an image signal decoder for decoding the image signals of currently controlled computer and display them, and a switchover display for outputting a switchover signal to switch image output channel and transmitting the switchover signal to the third micro processor for transmitting the commands of mouse and keyboard to relative computer.
Description
Technical field
The present invention relates to a kind of switch, particularly a kind of KVM switch of controlling all computing machines with one group of keyboard, mouse and screen.
Background technology
So-called KVM switch, be called the KVM switch again, K refers to keyboard (keyboard), V refers to image (video), M refers to mouse (mouse), be a kind of effective tool of managing many computing machines, as long as one group of keyboard, mouse and screen can be controlled all computing machines easily.
Early stage scheduler main frame, must test at least 48 hours, in order to test palpus a large amount of screen and keyboard, so a kind of simple type computer switch has just produced, can when production test, save unnecessary screen, keyboard, because its operating system major part is the DOS environment, the network of adding at that time is not general as yet, so and be careless about too many function.
Present KVM switch is applied to one or the environment of many computing machines of multidigit Admin Administration usually, or user must operate the environment of two or many computing machines, comprises on network operation center, data center, server room, software development, test laboratory, service centre, department LAN's network and the desktop many computing machines are installed simultaneously.
KVM switch has much more very advantages, for example utilize the space and the desktop of fitly reforming on or Liang Tai on the frame, three or the equipment of multicomputer more.Can also save in server room and the data center equipment costs of seldom using such as keyboard, screen and mouse, more can many computing machines of central control management, and do not need to change to another user's workstation by user's workstation troublesomely.
Therefore, a kind of KVM switch with one group of mouse, keyboard and screen, can be operated all computing machines, no matter for production firm or server admin center, real is a kind of quite necessary equipment.
Summary of the invention
In view of above problem, fundamental purpose of the present invention is to provide a kind of KVM switch, to reach the purpose of control multi-section computing machine.
For reaching above-mentioned purpose, the disclosed KVM switch of the present invention, make that the computing machine more than can be by one group of mouse and Keyboard Control, and at present the computing machine controlled of this mouse and this keyboard by a screen display that is connected with this KVM switch, include a first microprocessor, be connected to a bus switch via a PS/2 bus, this bus switch is connected to more than one PS/2 connectivity port; One second microprocessor is connected to a bus switch via a PS/2 bus, and this bus switch is connected to more than one PS/2 connectivity port; One the 3rd microprocessor, be connected to this first microprocessor and this second microprocessor via an I2C bus, and be connected to one first connectivity port and one second connectivity port via a PS/2 bus, in order to handling mouse signal and keyboard signal, and mouse command and keyboard commands are sent to the present computing machine of being controlled via this first microprocessor and this second microprocessor respectively; An and signal of video signal decoding scheme, be connected to an image switch, this image switch is connected to more than one image connectivity port, in order to a signal of video signal of the present computing machine of controlling via this image decoding circuit decode after, this screen display that connects via one the 3rd connectivity port that is connected with this image decoding circuit again.More include a switching display in addition, be connected to this signal of video signal decoding scheme by a decoding scheme, switch signal to switch the channel of image output in order to export one, and this switching signal is sent to the 3rd microprocessor, make the 3rd microprocessor this mouse command and keyboard commands can be sent to corresponding computing machine.
Description of drawings
Fig. 1 is for using the system architecture diagram of KVM switch of the present invention;
Fig. 2 is the circuit block diagram of KVM switch of the present invention;
Fig. 3 is the main flow chart of the 3rd microprocessor of KVM switch of the present invention;
Fig. 4 is that the PS/2 of the 3rd microprocessor of KVM switch of the present invention interrupts process flow diagram;
Fig. 5 is the process flow diagram of handoff of the 3rd microprocessor of KVM switch of the present invention;
Fig. 6 is the process flow diagram that the internal clocking of the 3rd microprocessor of KVM switch of the present invention is interrupted;
Fig. 7 is the first microprocessor of KVM switch of the present invention and the main flow chart of second microprocessor;
Fig. 8 is that the first microprocessor of KVM switch of the present invention and the I2C of second microprocessor interrupt process flow diagram.
Symbol description among the figure
100 KVM switch
200 computing machines
300 keyboards
400 mouses
500 screens
101 first bus switches
102 second bus switches
103 image switchs
111 first connectivity ports
112 second connectivity ports
113 the 3rd connectivity ports
121 first microprocessors
122 second microprocessors
123 the 3rd microprocessors
140 signal of video signal decoding schemes
141 code translators
142 demultiplexers
143 switching displays
144 decoding schemes
145 holding circuits
146 states read in device
147 extended interfaces
149 logic gates
151 PS/2 buses
152 PS/2 buses
153 I2C buses
Step 610 receives mouse and keyboard data
Step 611 is set up the initialization data that shows
Whether step 612 I2C bus has data
Step 613 receives data
Whether step 711 PS/2 bus has data to transmit
Step 721 receives data and is sent to bus
Step 722 is got back to program breakpoint
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with drawings and Examples.
At first, please refer to Fig. 1, for using system architecture diagram of the present invention.As shown in the figure, the disclosed KVM switch 100 of the present invention can connect the computing machine 200 more than at least one.Computing machine 200 is not connected with display devices such as peripherals such as screen, mouse and screen, and by KVM switch 100, make keyboard 300, mouse 400 can control many computing machines, and, the present computing machine of controlling is shown on the screen 500 by KVM switch 100.
The computing machine 200 that herein refers to not is only to be connected to a computing machine, but representative is connected to many computing machines, only represents with a computing machine so that illustrate that below indication computing machine in the explanation if specify, is similarly and represents the Duo Tai computing machine.
Inside composition in the KVM switch 100 please refer to Fig. 2.Include first bus switch 101 and one second bus switch 102, wherein first bus switch 101 is in order to be connected to the keyboard connectivity port of computing machine 200, for example PS/2 connectivity port or AT connectivity port, can use a plurality of switch serial connections to form with connectivity port, for example four pairs one demultiplexers can be reached the purpose of controlling many computing machines.And second bus switch 102, in order to be connected to the mouse connectivity port of computing machine 200, for example, the PS/2 connectivity port can use a plurality of switch serial connections with connectivity port to form equally, for example four pairs one demultiplexers.
The connectivity port that is connected with peripheral opertaing device is still arranged in addition, include first connectivity port 111 and be connected to a keyboard, second connectivity port 112 is connected to a mouse.First connectivity port 111 might not connect keyboard, also can connect mouse, and only when connecting, the periphery that the connectivity port that first bus switch is connected must be connected with first connectivity port can get final product by the ditch messenger.Below explanation will be represented the connecting key dish, the second representative connection mouse with first.
And what be connected to computing machine 200 image I/O ports is an image switch 103, connects by image bus (VGA Bus).First bus switch 101 and second bus switch 102 are all the switch of bi-directional digital formula, and image switch 103 is unidirectional analog switch.Image switch 103 only in order to output image signal to screen display, therefore adopt unidirectional switch to get final product.Be connected to a screen by the 3rd connectivity port 113, and the message of the present computing machine of controlling is shown.Image switch 103 and 113 of the 3rd connectivity ports are connected with the signal of video signal decoding scheme 140 that a code translator 141 and a demultiplexer 142 are formed, code translator 141 is one to have the integrated circuit (IC) chip (IC) of decoding function, demultiplexer 142 is two pairs one a demultiplexer, is connected with the 3rd connectivity port on 113 the screen in order to be shown in after the decoding of signal of video signal that image switch 103 is exported.
Except said modules, more include a switching display 143, in order to switch the computing machine that to control, and can show the present computing machine that switches by the LED display lamp, be connected to code translator 141 by a decoding scheme 144, in order to selected delivery channel decoding is shown for switching display 143.The channel that switching display 143 only selects image to export is not done the operation of switching to first bus 101 and second bus 102.The switching signal that the 3rd microprocessor 123 is exported according to switching display 143 is sent to corresponding computing machine with mouse command and keyboard commands.143 of the 3rd microprocessor 123 and switching displays more include a holding circuit 145, are a Shi Mite (Schmitt) circuit, terminate in when switching the unstable signal that is produced and influence the running of the 3rd microprocessor 123 in order to anti-.
Other has a state to read in device 146, is the integrated circuit (IC) chip of a parallel input string line output (parallel in/serialout), reads in the 3rd microprocessor 123 in order to the state with power supply.And the extended interface 147 that is connected to demultiplexer 142 and the 3rd microprocessor 123 is in order to join in the storehouse mode with another group KVM switch, with the computing machine of more of controls.The 3rd microprocessor 132 more is connected with a logic gate 149, and logic gate 149 is one to have the logic gate of activation pin position, whether is using mouse or keyboard, that is in order to receive whether mouse command or keyboard commands are arranged in order to the detecting user.
Below with the process of flowchart text first microprocessor, second microprocessor and the running of the 3rd microprocessor internal.Whether the first microprocessor and second microprocessor mainly have data will pass to the 3rd microprocessor in order to monitoring, the 3rd microprocessor is the core of KVM switch, in order to handling mouse data and keyboard data, and send mouse command and keyboard commands to computing machine 200 from computing machine 200.
The main flow of the 3rd microprocessor at first is described.Please refer to Fig. 3, is the main flow chart of the 3rd microprocessor.The 3rd microprocessor is mainly in order to connect mouse, keyboard and to handle mouse command and keyboard commands by second connectivity port, first connectivity port.
After start, the 3rd microprocessor will be detected keyboard and mouse (step 610), and set up the initial initialization data (step 611) that shows, that is adaptive switched unit obtains the demonstration channel (display channel) that sets at present.Whether then lasting monitoring I2C bus has data, and (step 612 if any, is then carried out I2C interrupt routine (step 613).Here the I2C that refers to interrupts being meant the interruption that is triggered by the I2C engine.
The 3rd microprocessor is to have the microprocessor that can support the I2C bus in a kind of, and when the I2C bus has data will input to the 3rd microprocessor, built-in I2C engine will interrupt performed program at present automatically.When the I2C bus has data, the 3rd microprocessor will receive and handle mouse data and the keyboard data from the first microprocessor and second microprocessor.
The 3rd microprocessor still comprises three interrupt routines except carrying out above-mentioned flow process.At first please refer to Fig. 4, the PS/2 that is the 3rd microprocessor interrupts process flow diagram, when mouse command or keyboard commands will be sent to computing machine 200, the 3rd microprocessor can be carried out a PS/2 interrupt routine (step 620), to interrupt the performed program of present the 3rd microprocessor.Then, the 3rd microprocessor is sent to (step 621) after the I2C bus with mouse command or keyboard commands, and program will be got back to and be interrupted starting point (step 622).
Another interrupt routine of the 3rd microprocessor is a handoff, and handoff refers to the interruption that is triggered by switching channels.When switching display switch to show channel, expression was the present computing machine of controlling of conversion, and this switching signal is sent by switching display and triggered the 3rd microprocessor.
Please refer to Fig. 5, it is the process flow diagram of the handoff of the 3rd microprocessor, when the user is switched the computing machine of being controlled with switch unit, the 3rd microprocessor will receive one and switch look-at-me, promptly carry out handoff program (step 630), with the image transmission channel switch to that switch unit sets image transmission channel (step 631) afterwards, come back to the breakpoint (step 632) of program again.At this moment, the 3rd microprocessor will be sent to corresponding computing machine with mouse command and keyboard commands via first bus switch and second bus switch according to switching signal.
Last interrupt routine is that internal clocking is interrupted, internal clocking is interrupted being triggered by the timer of the 3rd microprocessor internal, in order to upgrade present power supply status table, make win bus switch and second bus switch can be according to the power supply status table supervisory control comuter after upgrading, and each connectivity port in each bus switch all need not be monitored, to reduce whole usefulness.
Please refer to Fig. 6 is the process flow diagram of the internal clocking interruption of the 3rd microprocessor, when timer internal triggers internal clocking interruption (step 640), the 3rd microprocessor will read in the sequence data that device exports from state and read in present power supply status, and upgrade power supply status table (step 641) in the 3rd microprocessor, and change the display lamp that shows on channel and the switching display, return program breakpoint (step 642) at last.
The operation workflow of the first microprocessor and second microprocessor then is described, first microprocessor is identical with the function mode of second microprocessor, and therefore, below explanation will be applicable to the first microprocessor and second microprocessor simultaneously.
Please refer to Fig. 7, main flow chart for the first microprocessor and second microprocessor, whether the first microprocessor and second microprocessor be in order to have mouse data and keyboard data in the continuous supervisory control comuter 200, when KVM switch is started shooting, whether inner bus switch can carry out initialized program (step 710), have data to transmit so that monitor the mouse and the keyboard of all a plurality of computer switch that connected simultaneously.After the initialization, just monitor constantly by the first microprocessor and second microprocessor, that is constantly to monitor be that PS/2 does not have data will transmit (step 711), when data will be transmitted, then data are sent to the first microprocessor and second microprocessor by the PS/2 bus, send again to I2C bus (step 712), receive by the 3rd microprocessor.Final program returns step 711.
In the first microprocessor and second microprocessor interrupt routine is arranged, for I2C interrupts, refer to when the 3rd microprocessor has mouse command and keyboard commands to be sent to computing machine 200, the engine of I2C can carry out an internal interrupt (internal interrupt) program (step), that is this interrupt routine can carry out when the 3rd microprocessor will transmit order, make the first microprocessor and second microprocessor can receive mouse command and keyboard commands, and be sent to the PS/2 bus so that computing machine 300 is controlled.
Please refer to Fig. 8, be the I2C interruption process flow diagram of the first microprocessor and second microprocessor.The first microprocessor and second microprocessor internal can be carried out I2C interruption (step 720) when the 3rd microprocessor will transmit order, the first microprocessor and second microprocessor can receive mouse command or keyboard commands (step 721) from the I2C bus, and will order and be sent to the PS/2 bus via bus switch and enter in the computing machine.After transmission finishes, the watchdog routine of first microprocessor inside will be got back to breakpoint (step 722), and whether proceed supervisory control comuter again has data transmission.
The disclosed KVM switch of the present invention; the design of employing electronic type; traditional mechanical formula product is built in non-open market; therefore the situation that computing machine is shut down or keyboard/mouse can't be worked can not take place in handoff procedure; install simultaneously easily; plug and play must not install any adapter additional or any program is installed.In the computer booting state, the interim installation also can not cause computing machine to shut down, and is highly suitable for computer room, server host need not be shut down the operation of in the same old way can relievedly feeling at ease.
In addition, have more following advantage:
1. expand easily on the framework;
2. have a modularization, firmware is developed easily;
3. by the I2C bus, the storehouse that can reach switch is to control more computing machine;
4. the kenel (Bus Type) of changing microprocessor and bus can make the storehouse number increase easily;
5. the computing machine of Lian Jieing switching on and shutting down at any time do not influence the operation of other computing machine;
6. can be with the start of computing machine random time from being dynamically connected its keyboard, mouse function;
7. the computer switch OLED (LED) of having shows and selector switch, makes things convenient for the computing machine of map function.
Though the present invention discloses as above with aforesaid preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of correlation technique person; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so the scope person of defining that protection scope of the present invention must be looked claims is as the criterion.
Claims (15)
1. KVM switch makes that the computing machine more than can be by one group of mouse and Keyboard Control, and the computing machine controlled of this mouse and this keyboard is characterized in that by a screen display that is connected with this KVM switch at present, includes:
One first microprocessor is connected to a bus switch via a PS/2 bus, and this bus switch is connected to more than one PS/2 connectivity port;
One second microprocessor is connected to a bus switch via a PS/2 bus, and this bus switch is connected to more than one PS/2 connectivity port;
One the 3rd microprocessor, be connected to this first microprocessor and this second microprocessor via an I2C bus, and be connected to one first connectivity port and one second connectivity port via a PS/2 bus, in order to handling mouse signal and keyboard signal, and mouse command and keyboard commands are sent to the present computing machine of being controlled via this first microprocessor and this second microprocessor respectively; And
One signal of video signal decoding scheme, be connected to an image switch, this image switch is connected to more than one image connectivity port, in order to a signal of video signal of the present computing machine of controlling via this image decoding circuit decode after, this screen display that connects via one the 3rd connectivity port that is connected with this image decoding circuit again.
2. KVM switch as claimed in claim 1, it is characterized in that, more include a switching display, be connected to this signal of video signal decoding scheme by a decoding scheme, switch signal to switch the channel of image output in order to export one, and this switching signal is sent to the 3rd microprocessor, make the 3rd microprocessor this mouse command and keyboard commands can be sent to corresponding computing machine.
3. KVM switch as claimed in claim 2 is characterized in that, more is connected with a holding circuit between this switching display and the 3rd microprocessor, in order to avoid switching the unstable signal that the image delivery channel is produced.
4. KVM switch as claimed in claim 1 is characterized in that, this first microprocessor is a preferential interrupt microprocessor.
5. KVM switch as claimed in claim 1 is characterized in that, this second microprocessor is a preferential interrupt microprocessor.
6. KVM switch as claimed in claim 1 is characterized in that, the 3rd microprocessor is a preferential interrupt microprocessor.
7. KVM switch as claimed in claim 1 is characterized in that, this first bus switch is the switch of a two-way transmitting digital signals.
8. KVM switch as claimed in claim 7 is characterized in that, this first bus switch is formed by an above many-one demultiplexer serial connection.
9. KVM switch as claimed in claim 1 is characterized in that, this second bus switch is the switch of a two-way transmitting digital signals.
10. KVM switch as claimed in claim 9 is characterized in that, this second bus switch is formed by an above many-one demultiplexer serial connection.
11. KVM switch as claimed in claim 1 is characterized in that, this image decoding circuit more includes a code translator and demultiplexer.
12. KVM switch as claimed in claim 1 is characterized in that, the state that more includes reads in device, in order to the power supply status that reads this computing machine more than one and export the 3rd microprocessor to.
13. KVM switch as claimed in claim 11 is characterized in that, this state reads in the integrated circuit (IC) chip that device is a parallel list entries output.
14. KVM switch as claimed in claim 11 is characterized in that, this state reads in device and is connected to this at least more than one PS/2 connectivity port.
15. KVM switch as claimed in claim 1 is characterized in that, more includes an extended interface, is connected to this demultiplexer and this three microprocessor, in order to this KVM switch is connected with another KVM switch storehouse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031014798A CN1517871A (en) | 2003-01-17 | 2003-01-17 | Multi computer switchover device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031014798A CN1517871A (en) | 2003-01-17 | 2003-01-17 | Multi computer switchover device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1517871A true CN1517871A (en) | 2004-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA031014798A Pending CN1517871A (en) | 2003-01-17 | 2003-01-17 | Multi computer switchover device |
Country Status (1)
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| CN (1) | CN1517871A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006058488A1 (en) * | 2004-12-01 | 2006-06-08 | Nanjing E-Security Technalogy Company | A device and method for computer display synthesis |
| CN1324435C (en) * | 2004-10-20 | 2007-07-04 | 英业达股份有限公司 | Online switching interface for multitask type computer peripheral equipment |
| US7505255B2 (en) | 2006-03-29 | 2009-03-17 | Aten International Co. Ltd. | KVM module with torsion-varying hinge |
| CN102117125A (en) * | 2009-12-31 | 2011-07-06 | 宏正自动科技股份有限公司 | Method for video broadcast in a KVM system |
| CN101859237B (en) * | 2009-04-07 | 2012-05-23 | 宏正自动科技股份有限公司 | Multicomputer switching system and audio transmitting method thereof |
| CN101859307B (en) * | 2009-04-07 | 2015-08-12 | 宏正自动科技股份有限公司 | Kvm switch for switching among computers by employing mouse movement, computer system and document searching method |
| CN105404493A (en) * | 2015-12-19 | 2016-03-16 | 湖南科技大学 | Large-scale parallel rendering node computer video display change-over switch |
| CN107145338A (en) * | 2017-03-16 | 2017-09-08 | 江苏航天龙梦信息技术有限公司 | A kind of control system that switching on and shutting down and the switching of interior external equipment are realized by keyboard hot key |
| CN110692219A (en) * | 2017-05-01 | 2020-01-14 | 惠普发展公司，有限责任合伙企业 | Input data switcher |
-
2003
- 2003-01-17 CN CNA031014798A patent/CN1517871A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1324435C (en) * | 2004-10-20 | 2007-07-04 | 英业达股份有限公司 | Online switching interface for multitask type computer peripheral equipment |
| WO2006058488A1 (en) * | 2004-12-01 | 2006-06-08 | Nanjing E-Security Technalogy Company | A device and method for computer display synthesis |
| US7505255B2 (en) | 2006-03-29 | 2009-03-17 | Aten International Co. Ltd. | KVM module with torsion-varying hinge |
| CN101859237B (en) * | 2009-04-07 | 2012-05-23 | 宏正自动科技股份有限公司 | Multicomputer switching system and audio transmitting method thereof |
| CN101859307B (en) * | 2009-04-07 | 2015-08-12 | 宏正自动科技股份有限公司 | Kvm switch for switching among computers by employing mouse movement, computer system and document searching method |
| CN102117125A (en) * | 2009-12-31 | 2011-07-06 | 宏正自动科技股份有限公司 | Method for video broadcast in a KVM system |
| CN105404493A (en) * | 2015-12-19 | 2016-03-16 | 湖南科技大学 | Large-scale parallel rendering node computer video display change-over switch |
| CN107145338A (en) * | 2017-03-16 | 2017-09-08 | 江苏航天龙梦信息技术有限公司 | A kind of control system that switching on and shutting down and the switching of interior external equipment are realized by keyboard hot key |
| CN110692219A (en) * | 2017-05-01 | 2020-01-14 | 惠普发展公司，有限责任合伙企业 | Input data switcher |
| CN110692219B (en) * | 2017-05-01 | 2023-09-05 | 惠普发展公司，有限责任合伙企业 | input data switcher |
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