CN111813238B - CPCI bus-based KVM module - Google Patents
CPCI bus-based KVM module Download PDFInfo
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- CN111813238B CN111813238B CN202010705247.9A CN202010705247A CN111813238B CN 111813238 B CN111813238 B CN 111813238B CN 202010705247 A CN202010705247 A CN 202010705247A CN 111813238 B CN111813238 B CN 111813238B
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- 230000005236 sound signal Effects 0.000 claims abstract description 10
- 238000013461 design Methods 0.000 claims abstract description 8
- 239000011159 matrix material Substances 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 241000699666 Mus <mouse, genus> Species 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000010365 information processing Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000699670 Mus sp. Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
- G06F3/023—Arrangements for converting discrete items of information into a coded form, e.g. arrangements for interpreting keyboard generated codes as alphanumeric codes, operand codes or instruction codes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4004—Coupling between buses
- G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention relates to a CPCI bus-based KVM module, belonging to the technical field of reinforced computers. The invention designs a CPCI bus-based KVM module, which is used for realizing VGA video signal 4×4 switching function, DVI video signal 4×4 switching function, USB signal 4×4 switching function and audio signal 4×1 switching function, solving the problems that the corresponding relation between a command seat of a traditional vehicle-mounted reinforcement server and a server unit arranged in a chassis of the server cannot be configured and tasks cannot be quickly recovered after the server unit fails, and improving the usability and usability of the system.
Description
Technical Field
The invention belongs to the technical field of reinforced computers, and particularly relates to a CPCI bus-based KVM module.
Background
The command system is an important component of weapon system equipment, is an information processing center of the whole weapon system, and the server is used as core information processing equipment of the command system, so that good expandability is required, and a plurality of sets of displays and keyboard and mice are required to be supported by the server for facilitating command and staff to know battlefield situations and conduct command decisions on command vehicles such as a command system shelter type, wheel type armor and track armor.
A typical command car application scene provides 4 seats for command and staff, and each seat provides 1 VGA display, 1 DVI display and 1 set of keyboard and mouse. The server is internally provided with 4 server units, and each server unit outputs 2 paths of DP, 1 path of USB and 1 path of audio signals. After conversion and switching by the KVM module, connect to 4 seats. Under the default setting, the server units 1-4 correspond to seats 1-4; in the operation process, if the default server unit 1 of the seat 1 fails, the backup server unit is automatically switched to the current seat, that is, signals such as VGA, DVI, USB and audio of the backup server unit are automatically switched to the seat 1, and the staff of the seat 1 can continue to operate. Similarly, when the seats 2-4 fail, the backup server unit can automatically switch the seats to enable the tasks to continue.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to solve the technical problems that: how to solve the problems that the corresponding relation between the command seat of the traditional vehicle-mounted reinforcement server and the server unit arranged in the chassis of the server can not be configured, and the task can not be quickly recovered after the server unit fails.
(II) technical scheme
In order to solve the technical problems, the invention provides a CPCI bus-based KVM module, which comprises a DP-to-VGA module, a DP-to-DVI module, a VGA switching module, a DVI switching module, a USB switching module, an audio switching module and a switching control module;
the DP-to-VGA module is a DP-to-VGA circuit, the DP-to-DVI module is a DP-to-DVI circuit, the VGA switching module is a VGA 4-to-4 matrix switching circuit, the DVI switching module is a DVI 4-to-4 matrix switching circuit, the USB switching module is a USB signal 4-to-4 switching circuit, and the audio switching module is an audio 4-to-1 switching circuit;
the KVM module receives a DP signal, a USB signal and an audio signal which are input by a server unit in a chassis of the server; the USB signal is switched to a 4 switching circuit through the USB signal 4, and corresponding signals are output to a correct external USB interface according to a switching instruction; the audio signal passes through the audio 4-to-1 switching circuit, and the selected signal is output to an external audio interface according to the switching instruction; the DP signal is converted into 4 paths of VGA signals and 4 paths of DVI signals through the DP-to-VGA circuit and the DP-to-DVI circuit respectively, and the 4 paths of VGA signals and the 4 paths of DVI signals respectively enter the VGA 4-to-4 matrix switching circuit and the DVI 4-to-4 matrix switching circuit, and the corresponding signals are output to a correct external VGA interface and a correct DVI interface according to the switching instruction requirement.
Preferably, the switching control module sends the switching instruction to the relevant functional module through 3 communication interfaces of UART, ethernet and GPIO to realize switching of signals, and the switching control module comprises a switching controller with three different communication interfaces: the first switching controller is connected with each external server unit through a UART interface of TTL level, and can receive switching instructions of any server unit through the UART interface; the second switching controller is connected with an Ethernet switching module in the chassis through a 100BAST-T Ethernet interface, and can receive switching instructions of any server units through the Ethernet; the three switching controllers are connected with the panel buttons of the case through GPIO interfaces and receive switching instructions through the GPIO interfaces.
Preferably, all three switching controllers are BMC controllers.
Preferably, the DP-to-VGA circuit adopts an ANX9833 chip to realize the conversion from DP to VGA signals.
Preferably, the DP to DVI circuit is a DP to dual link DVI circuit.
Preferably, the VGA 4-to-4 matrix switching circuit is implemented by using a VGA matrix switching chip SGM6514YLFA 32G.
Preferably, the DVI 4-by-4 matrix switching circuit is implemented by using a 16×16 asynchronous digital cross-point switch ADN4604 which is independent of a protocol.
Preferably, the USB signal 4-to-4 switching circuit is based on a PI3USB14ALEX chip design.
Preferably, the audio 4-to-1 switching circuit is implemented by using an audio 4-to-1 switching chip SGM6511YLFA 32G.
The invention also provides a method for realizing signal switching by using the KVM module, wherein in the method, 3 switching modes are adopted, namely, the switching is performed through a keyboard hot key, the switching is performed through a software button, and the switching is performed through a case button; the keyboard hotkey and the software button send the switching instruction to the corresponding switching controller through a UART or Ethernet by the server unit receiving the switching instruction, and the case button directly sends the switching instruction to the corresponding switching controller through a GPIO; when the keyboard hot key mode is adopted for switching, 2 conditions are considered in design, namely under an operating system, after the monitoring software receives a keyboard instruction, the keyboard instruction is sent to each switching circuit of the KVM module through a network or a serial port; and the other is that under the condition of no operating system, the BIOS monitors the hot keys of the keyboard, after the keyboard instruction is monitored, the keyboard instruction is sent to each switching circuit of the KVM module through the serial port, and the switching circuit completes the switching action after receiving the switching instruction.
(III) beneficial effects
The invention designs a CPCI bus-based KVM module, which is used for realizing VGA video signal 4×4 switching function, DVI video signal 4×4 switching function, USB signal 4×4 switching function and audio signal 4×1 switching function, solving the problems that the corresponding relation between a command seat of a traditional vehicle-mounted reinforcement server and a server unit arranged in a chassis of the server cannot be configured and tasks cannot be quickly recovered after the server unit fails, and improving the usability and usability of the system.
Drawings
FIG. 1 is a logical block diagram of a KVM module of the present invention.
Detailed Description
For the purposes of clarity, content, and advantages of the present invention, a detailed description of the embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in fig. 1, the KVM module based on CPCI bus provided by the present invention is suitable for a ruggedized computer device conforming to CPCI bus, and is used for implementing a VGA video signal 4×4 switching function, a DVI video signal 4×4 switching function, a USB signal 4×4 switching function, and an audio signal 4×1 switching function, so as to improve usability and usability of the system.
The KVM module comprises a DP-to-VGA module, a DP-to-DVI module, a VGA switching module, a DVI switching module, a USB switching module, an audio switching module and a switching control module;
the DP-to-VGA module is a DP-to-VGA circuit, the DP-to-DVI module is a DP-to-DVI circuit, the VGA switching module is a VGA 4-to-4 matrix switching circuit, the DVI switching module is a DVI 4-to-4 matrix switching circuit, the USB switching module is a USB signal 4-to-4 switching circuit, and the audio switching module is an audio 4-to-1 switching circuit;
the KVM module receives a DP signal, a USB signal and an audio signal which are input by a server unit in a chassis of the server; the USB signal is switched to a 4 switching circuit through the USB signal 4, and corresponding signals are output to a correct external USB interface according to a switching instruction; the audio signal passes through the audio 4-to-1 switching circuit, and the selected signal is output to an external audio interface according to the switching instruction; the DP signal is converted into 4 paths of VGA signals and 4 paths of DVI signals through the DP-to-VGA circuit and the DP-to-DVI circuit respectively, and the 4 paths of VGA signals and the 4 paths of DVI signals respectively enter the VGA 4-to-4 matrix switching circuit and the DVI 4-to-4 matrix switching circuit, and the corresponding signals are output to a correct external VGA interface and a correct DVI interface according to the switching instruction requirement.
According to the use requirement of the system, the external display interfaces of the whole machine are VGA interfaces and DVI interfaces, but the server unit only outputs 2 groups of DP signals, so that the DP-to-VGA circuit and the DP-to-DVI circuit are designed on the KVM module.
And the DP-to-VGA circuit adopts an ANX9833 chip to realize the conversion from DP to VGA signals. VGA resolution is not less than 1920×1080. Converting the DisplayPort signal into a VGA signal; support displayport1.2 dual mode or single mode source; a DC/DC power chip is built in the conversion chip, so that a program can be updated on line; support 2Lane high-speed transmission 2.7Gbps; lane can reach 5.4Gbps; the EDP1.3 standard is supported, and the displayport1.1 standard is downward compatible; WQXGA is supported, with highest resolution 1920 x 1200@60hz.
The DP-to-DVI circuit is a DP-to-dual-link DVI circuit, and the conversion from DP to dual-link DVI is realized by adopting a PS176+Sil9777 chip, wherein the resolution of the dual-link DVI is not less than 2560 multiplied by 1600. The conversion chip converts the DisplayPort signal into the HDMI signal, can support the highest data transmission rate to HDMI2.0 to reach 6Bbit per second, and can transmit complete 4KUHD, 60Hz, 24bits color and 4 by matching with four high-speed transmission channels supporting HBR2 (5.4 Gbps/sec) of DP1.2 or DP 1.3: 4:4 sampled frames. PS176 may convert the signal to 4:2:0HDMI signal output, remove the function of signal jitter (jitter cleaning), while carrying on the signal conversion, can remove the existing jitter of the DisplayPort signal source or signal jitter produced in the course of transmitting through DisplayPort; after being subjected to the JitterCleaning process, the clean and low-jitter HDMI2.0 signal is output. 4K@50/60Hz ultra-high definition defined by HDMI2.0 specification is supported; HDCP2.2 premium content protection protocol; MHL1.0, MHL2.0 and MHL3.0, up to 4K video input resolution.
VGA 4-to-4 matrix switching circuit selects VGA matrix switching chip SGM6514YLFA32G,16 input and 8 output, and supports WUXGA (1920 multiplied by 1200).
The DVI 4-to-4 matrix switching circuit selects a 16 multiplied by 16 asynchronous digital cross point switch ADN4604 which is irrelevant to a protocol, has 16 differential PECL/CML compatible inputs and 16 differential CML outputs, and optimizes NRZ signaling, wherein the data rate of each port is up to 4.25Gbps. Each port provides fixed input equalization, programmable output swing, and output pre-emphasis. The ADN4604 non-blocking type switch core adopts a 16×16 longitudinal-transverse structure, supports independent channel switches through a serial control interface, has low delay and extremely low inter-channel deflection characteristic, and power consumption is controlled at 130mW per channel.
The USB signal 4-to-4 switching circuit is designed based on a PI3USB14ALEX chip, has three-state output, low voltage, high bandwidth and near zero propagation delay, and supports the characteristics of hot plug and 2kV ESD protection.
The audio 4-to-1 switching circuit selects an audio 4-to-1 switching chip SGM6511YLFA32G, 16-way input and 8-way output to support analog signal switching.
The switching control module sends switching instructions to related functional modules through 3 communication interfaces of UART, ethernet and GPIO to realize switching of signals, and the module comprises a switching controller with three different communication interfaces: the first switching controller is connected with each external server unit through a UART interface of TTL level, and can receive switching instructions of any server unit through the UART interface; the second switching controller is connected with an Ethernet switching module in the chassis through a 100BAST-T Ethernet interface, and can receive switching instructions of any server units through the Ethernet; the three switching controllers are connected with the panel buttons of the case through GPIO interfaces and receive switching instructions through the GPIO interfaces. All three controllers are BMC controllers. The design of BMC controllers is based on the IPMI (Intelligent platform management interface) specification. The BMC controller runs independently of the CPU and the operating system of the main board, so that the reliability and stability of management are improved. And the electrical parameters of related hardware are transmitted to the BMC in real time through a physical sensor on the main board. The BMC controller selects an ARMCortex-M332bit MCU micro-processing chip GD32F103RKT6 which is easy to innovate in China. QSPIFLASH is GD25Q256C for storing configuration information of the board card, information to be stored such as logs, etc. The on-board temperature point and voltage were monitored through the ADC interface of GD32F103 RKT. Because each command seat is provided with 1 DVI display, 1 VGA display and 1 set of keyboard and mouse, for the convenience of operation, DVI, VGA and USB signals of each server unit are bound into 1 set in design, and the whole switch is realized during the switch.
The KVM module is a European standard 3U board card, and the bus connector and definition meet the PCMCIA2.0 standard.
The invention also provides a method for realizing signal switching by using the KVM module, wherein an operator has 3 switching modes, namely, switching is performed through a keyboard hot key, switching is performed through a software button, and switching is performed through a case button; the keyboard hotkey and the software button send the switching instruction to the corresponding switching controller through the UART or the Ethernet by the server unit receiving the switching instruction, and the case button directly sends the switching instruction to the corresponding switching controller through the GPIO. When the keyboard hot key mode is adopted for switching, 2 conditions are considered in design, namely under an operating system, after the monitoring software receives a keyboard instruction, the keyboard instruction is sent to each switching circuit of the KVM module through a network or a serial port; and the other is that under the condition of no operating system, the BIOS monitors the hot keys of the keyboard, after the keyboard instruction is monitored, the keyboard instruction is sent to each switching circuit of the KVM module through the serial port, and the switching circuit completes the switching action after receiving the switching instruction.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (2)
1. The KVM module based on the CPCI bus is characterized by comprising a DP-to-VGA module, a DP-to-DVI module, a VGA switching module, a DVI switching module, a USB switching module, an audio switching module and a switching control module;
the DP-to-VGA module is a DP-to-VGA circuit, the DP-to-DVI module is a DP-to-DVI circuit, the VGA switching module is a VGA 4-to-4 matrix switching circuit, the DVI switching module is a DVI 4-to-4 matrix switching circuit, the USB switching module is a USB signal 4-to-4 switching circuit, and the audio switching module is an audio 4-to-1 switching circuit;
the KVM module receives a DP signal, a USB signal and an audio signal which are input by a server unit in a chassis of the server; the USB signal is switched to a 4 switching circuit through the USB signal 4, and corresponding signals are output to a correct external USB interface according to a switching instruction; the audio signal passes through the audio 4-to-1 switching circuit, and the selected signal is output to an external audio interface according to the switching instruction; the DP signal is converted into 4 paths of VGA signals and 4 paths of DVI signals through the DP-to-VGA circuit and the DP-to-DVI circuit respectively, and the 4 paths of VGA signals and the 4 paths of DVI signals respectively enter the VGA 4-to-4 matrix switching circuit and the DVI 4-to-4 matrix switching circuit, and the corresponding signals are output to a correct external VGA interface and a correct DVI interface according to the switching instruction requirement;
the switching control module sends switching instructions to related functional modules through 3 communication interfaces of UART, ethernet and GPIO to realize switching of signals, and the switching control module comprises a switching controller with three different communication interfaces: the first switching controller is connected with each external server unit through a UART interface of TTL level, and receives switching instructions of any server unit through the UART interface; the second switching controller is connected with an Ethernet switching module in the chassis through a 100BAST-T Ethernet interface, and receives a switching instruction of any server unit through the Ethernet; the third switching controller is connected with a panel button of the case through a GPIO interface and receives a switching instruction through the GPIO interface;
the three switching controllers are BMC controllers;
the DP-to-VGA circuit adopts an ANX9833 chip to realize the conversion from DP to VGA signals;
the DP-to-DVI circuit is a DP-to-dual link DVI circuit;
the VGA 4-switching 4 matrix switching circuit is realized by selecting a VGA matrix switching chip SGM6514YLFA 32G;
the DVI 4-cut 4 matrix switching circuit is realized by selecting a 16 multiplied by 16 asynchronous digital cross point switch ADN4604 which is irrelevant to a protocol;
the USB signal 4-switching circuit is designed based on a PI3USB14ALEX chip;
the audio 4-to-1 switching circuit is realized by using an audio 4-to-1 switching chip SGM6511YLFA 32G.
2. A method for realizing signal switching by utilizing the KVM module as defined in claim 1, wherein the method has 3 switching modes, namely, switching by a keyboard hot key, switching by a software button and switching by a case button; the keyboard hotkey and the software button send the switching instruction to the corresponding switching controller through a UART or Ethernet by the server unit receiving the switching instruction, and the case button directly sends the switching instruction to the corresponding switching controller through a GPIO; when the keyboard hot key mode is adopted for switching, 2 conditions are considered in design, namely under an operating system, after the monitoring software receives a keyboard instruction, the keyboard instruction is sent to each switching circuit of the KVM module through a network or a serial port; and the other is that under the condition of no operating system, the BIOS monitors the hot keys of the keyboard, after the keyboard instruction is monitored, the keyboard instruction is sent to each switching circuit of the KVM module through the serial port, and the switching circuit completes the switching action after receiving the switching instruction.
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| CN202010705247.9A CN111813238B (en) | 2020-07-21 | 2020-07-21 | CPCI bus-based KVM module |
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| CN202010705247.9A CN111813238B (en) | 2020-07-21 | 2020-07-21 | CPCI bus-based KVM module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101472125A (en) * | 2007-12-27 | 2009-07-01 | 深圳华为通信技术有限公司 | Control method and device for switching video |
| CN101634904A (en) * | 2008-07-25 | 2010-01-27 | 宏正自动科技股份有限公司 | Kvm system |
| CN111309157A (en) * | 2019-12-31 | 2020-06-19 | 湖南中普显控电子科技有限公司 | Multifunctional KVM switching device supporting computer expansion mode output |
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- 2020-07-21 CN CN202010705247.9A patent/CN111813238B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101472125A (en) * | 2007-12-27 | 2009-07-01 | 深圳华为通信技术有限公司 | Control method and device for switching video |
| CN101634904A (en) * | 2008-07-25 | 2010-01-27 | 宏正自动科技股份有限公司 | Kvm system |
| CN111309157A (en) * | 2019-12-31 | 2020-06-19 | 湖南中普显控电子科技有限公司 | Multifunctional KVM switching device supporting computer expansion mode output |
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