CN112506297A - Multi-computer display control switching method for VPX case - Google Patents
Multi-computer display control switching method for VPX case Download PDFInfo
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- CN112506297A CN112506297A CN202011446225.1A CN202011446225A CN112506297A CN 112506297 A CN112506297 A CN 112506297A CN 202011446225 A CN202011446225 A CN 202011446225A CN 112506297 A CN112506297 A CN 112506297A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/18—Packaging or power distribution
- G06F1/183—Internal mounting support structures, e.g. for printed circuit boards, internal connecting means
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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
- G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
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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
Abstract
The invention relates to a multi-computer display control switching method for a VPX chassis, and belongs to the technical field of VPX module display control. The computer module is connected with the switchboard module, the DP display switching module and the USB switching module in the switchboard are utilized to realize the function of multi-path input and one-path output of the display control signals, the output single-path display control signals can be connected to the display control equipment (a keyboard, a mouse and a display) for test and debugging, and the convenience of debugging and operating the multi-computer module of the VPX case is improved. The method reduces the using amount of the display control equipment of the multi-computer module VPX case in the debugging process, and greatly reduces the demand of the display control debugging interface of the VPX case.
Description
Technical Field
The invention relates to the technical field of VPX module display control, in particular to a multi-computer display control switching method for a VPX chassis.
Background
With the development and progress of science and technology, the performance and integration requirements of various fields on computers are higher and higher, a plurality of independent computer modules need to be integrated in one device to respectively complete independent tasks, and computer cases with high-speed interconnection bus advantages and high-integration VPX (virtual private network) architecture are more and more applied to high-end fields such as military affairs, aerospace and various industries. However, high integration brings great difficulty to the overall debugging of the system, and in order to perform online debugging of each computer module in the system, display control signals such as display of each computer module and display control signals such as a keyboard and a mouse are usually required to be connected to a debugging area, so that the number and density of connectors in the debugging area are greatly increased, and inconvenience is brought to the debugging. And one set of computer module just need connect one set of display control equipment and make the external device volume increase during the debugging, has promoted the complexity that debugging equipment built.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: the problem of inconvenient operation when debugging and testing different computers in the current multi-computer module VPX chassis is solved.
(II) technical scheme
In order to solve the technical problem, the invention provides a multi-computer display control switching method for a VPX case, which is realized by matching 2 power supply modules, 6U computer modules, 1 exchange board module and 1 VPX bus bottom board in the VPX case, wherein the VPX bus bottom board is fixed in the VPX case and is interconnected with each power supply module, each computer module and the exchange board module through a VPX connector, and the VPX bus bottom board provides interconnection of signals among all board cards and leads the signals out of the case shell;
the power supply module is used for converting externally input 220V alternating current into 12V or 5V direct current required by the work of each board card;
the exchange board module has Ethernet exchange function and display control switching function, and can process and switch DP video signals of 6 paths of computer modules which are completely consistent and are connected with the exchange board module in real time with USB keyboard and mouse signals, and then lead out the signals to the outside of the VPX case, so that a set of PS/2 keyboard, mouse and VGA display equipment is used for debugging and controlling 6 computer modules.
Preferably, the exchange board module comprises a CPU, an FPGA, a DP display switching module, a USB switching module, a DP to VGA circuit and a PS/2 to USB module; the switching board module receives a control instruction with a display control switching command through an Ethernet port, the control instruction with the display control switching command is sent to the FPGA after being processed by the CPU, the FPGA controls a DP display switching module, a USB switching module, a DP to VGA circuit and a PS/2 to USB module in the switching board module to complete display control switching work, and outputs 1 path of VGA signal and 2 paths of PS/2 signals to be led out of the VPX case;
the FPGA carries out DP video switching on 6 paths of DP display signals output by 6 computer modules through logic control, one path of DP signal is selected after being selected by a three-level two-way circuit in the DP display switching module during switching, then one path of VGA signal is converted and output through a DP to VGA circuit, and the converted VGA signal is output to a debugging area of a VPX case to be connected with a display for displaying; the three-stage one-out-of-two circuit consists of three DP switching 1-out-of-2 modules connected in parallel at a first stage, one DP switching 1-out-of-2 module at a second stage and one DP switching 1-out-of-2 module at a third stage, wherein the output ends of two DP switching 1-out-of-2 modules at the first stage are connected with the input end of the second DP switching 1-out-of-2 module at the second stage, and the output ends of the second DP switching 1-out-of-2 module at the second stage and the third DP switching 1-out-of-2 module at the first stage are connected with the input end of the third;
the 12 paths of USB signals of the 6 computer modules are divided into two parts, and 2 paths of USB signals are selected through a three-level USB switching alternative circuit through logic control of the FPGA; the three-stage USB switching alternative circuit consists of a first-stage USB switching alternative circuit, a second-stage USB switching alternative circuit and a third-stage USB switching alternative circuit, wherein the first-stage USB switching alternative circuit consists of six USB switching chips, the second-stage USB switching alternative circuit consists of two USB switching chips, and the third-stage USB switching alternative circuit consists of two USB switching chips, wherein the output ends of the first and second USB switching chips of the first-stage USB switching alternative circuit are connected with the input end of the first USB switching chip in the second-stage USB switching alternative circuit, the output end of the third USB switching chip of the first-stage USB switching alternative circuit is connected with the input end of the first USB switching chip of the third-stage USB switching alternative circuit, the output end of the first USB switching chip of the second-stage USB switching alternative circuit is connected with the input end of the first USB switching chip of the third-stage USB switching alternative circuit, the output ends of the fourth and fifth USB switching chips of the first USB switching alternative circuit are connected with the input end of the second USB switching chip of the second USB switching alternative circuit, the output end of the second USB switching chip of the second USB switching alternative circuit is connected with the input end of the second USB switching chip of the third USB switching alternative circuit, and the output end of the sixth USB switching chip of the first USB switching alternative circuit is connected with the input end of the second USB switching chip of the third USB switching alternative circuit.
Preferably, the power supply modules adopt a redundant design of double power supplies, and the two power supply modules are interconnected through control pins of an internal current-sharing circuit; the output of the power supply module has the functions of short-circuit protection, overcurrent protection and overvoltage protection, and when one power supply module breaks down, the output port of the power supply module is automatically cut off.
Preferably, each DP switches 1-out-of-2 module to select chip HD3SS 14; in the DP to VGA circuit, the selected video conversion chip is CH7517, and a VGA signal driver realized by LT6557IGN is added in the DP to VGA circuit.
Preferably, each USB switching chip uses TS3USB221A from TI corporation, and the USB switching chip can output USB signals alternatively.
Preferably, the externally input PS/2 keyboard and mouse signals are converted into USB signals through the PS/2 to USB module, and the USB signals are interconnected with the 2 paths of USB signals.
Preferably, the PS/2 to USB chip is CSC0101A-S16, which can convert the gated USB signal into a PS/2 signal.
The invention also provides a display control switching system for realizing the method.
Preferably, the system consists of 2 power supply modules, 6U computer modules, 1 switchboard module and 1 VPX bus backplane in a VPX chassis.
The invention also provides application of the system in the technical field of VPX module display control.
(III) advantageous effects
The invention respectively adds the signal enhancement module on the VGA and PS/2 display control interface of the computer module, improves the driving capability of signals and realizes the function of remote transmission of VGA and PS/2 signals. The technology can meet the application requirement of the computer module display control signal on the remote display control equipment (keyboard, mouse and display), and is suitable for the scene that the 6UVPX computer module and the display control equipment need to be arranged and used in a remote distributed mode. The transmission distance of the display control signal cable can reach more than 20 meters. The technology can meet the application requirement of the computer module display control signal on the remote display control equipment (keyboard, mouse and display), and is particularly suitable for the scenes that the computer and the display control equipment need to be arranged and used in a remote distributed mode.
Drawings
FIG. 1 is a general block diagram of one embodiment of the present invention;
FIG. 2 is a schematic block diagram of a display control switch according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a DP to VGA module according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a USB switch module and a PS/2 to USB module according to an embodiment of the present invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
In order to solve the problem that the operation is inconvenient when different computers are debugged and tested in the conventional multi-computer module VPX chassis, the invention designs and realizes a multi-computer display control switching method for the VPX chassis. The computer module is connected with the switch board module, the DP display switching module and the USB switching module in the switch board are utilized to realize the function of multi-path input and one-path output of display control signals, the output single-path display control signals are connected to a set of display control equipment (a keyboard and a mouse display) for test and debugging, and the convenience degree of debugging and operation of the multi-computer module of the VPX case is improved.
The invention provides a multi-mainboard display control switching method for a VPX chassis, which is realized by matching 2 power supply modules, 6U computer modules, 1 exchange board module and 1 VPX bus bottom board in the VPX chassis. The general block diagram and signal connection diagram of each module are shown in fig. 1. The VPX bus bottom plate is fixed in the VPX case and is interconnected with each power supply module, each computer module and the switch board module through a VPX connector, and the VPX bus bottom plate provides interconnection of signals among the board cards (each power supply module, each computer module and the switch board module) and leads the signals out of the case shell.
The power module is used for converting externally input 220V alternating current into 12V or 5V direct current required by the work of each board card, and the power module adopts a redundant design of double power supplies to ensure the reliability of the system. The two power modules are interconnected through the control pins of the internal current-sharing circuit, and the purpose of parallel output is achieved through the internal current-sharing circuit; the output of the power supply module has the functions of short-circuit protection, overcurrent protection and overvoltage protection, when one power supply module breaks down, the output port of the power supply module is automatically cut off, and the other power supply module is not affected, so that when the single power supply module breaks down, the work of the other power supply module can be guaranteed not to be affected.
As shown in fig. 2, the switching board module has an ethernet switching function and a display control switching function, and can process and switch DP video signals of 6 completely identical computer modules connected to the switching board module in real time with USB keyboard and mouse signals, and then lead out to the outside of the VPX chassis, so as to debug and control 6 computer modules using a set of PS/2 keyboard, mouse and VGA display devices.
Specifically, the exchange board module comprises a CPU, an FPGA, a DP display switching module, a USB switching module, a DP to VGA circuit and a PS/2 to USB module; the switching board module receives a control instruction with a display control switching command through an Ethernet port, the control instruction with the display control switching command is sent to the FPGA after being processed by the CPU, the FPGA controls a DP display switching module, a USB switching module, a DP to VGA circuit and a PS/2 to USB module in the switching board module to complete display control switching work, and outputs 1 path of VGA signal and 2 paths of PS/2 signals to be led out of the VPX case; any computer module in the case or an external computer can complete the control of display control switching by an Ethernet switch through an Ethernet bus.
The FPGA carries out DP video switching on 6 paths of DP display signals output by 6 computer modules through logic control, one path of DP signal is selected after being selected by a three-level two-way circuit in the DP display switching module during switching, then one path of VGA signal is converted and output through a DP to VGA circuit, and the converted VGA signal is output to a debugging area of a VPX case to be connected with a display for displaying; the three-stage one-out-of-two circuit consists of three DP switching 1-out-of-2 modules connected in parallel at a first stage, one DP switching 1-out-of-2 module at a second stage and one DP switching 1-out-of-2 module at a third stage, wherein the output ends of two DP switching 1-out-of-2 modules at the first stage are connected with the input end of the second DP switching 1-out-of-2 module at the second stage, and the output ends of the second DP switching 1-out-of-2 module at the second stage and the third DP switching 1-out-of-2 module at the first stage are connected with the input end of the third;
each DP switching 1-out-of-2 module selects a chip HD3SS 14; fig. 3 shows a schematic diagram of the DP-to-VGA circuit, where a selected video conversion chip is CH7517, the chip supports 1080P VGA video signal conversion output, 24LCS22AT is used to store configuration information of CH7517, and a VGA signal driver implemented by LT6557IGN is added to the DP-to-VGA circuit to enhance the driving capability of the VGA signal.
The 12 paths of USB signals of the 6 computer modules are divided into two parts, and 2 paths of USB signals are selected through a three-level USB switching alternative circuit through logic control of the FPGA; the three-stage USB switching alternative circuit consists of a first-stage USB switching alternative circuit, a second-stage USB switching alternative circuit and a third-stage USB switching alternative circuit, wherein the first-stage USB switching alternative circuit consists of six USB switching chips, the second-stage USB switching alternative circuit consists of two USB switching chips, and the third-stage USB switching alternative circuit consists of two USB switching chips, wherein the output ends of the first and second USB switching chips of the first-stage USB switching alternative circuit are connected with the input end of the first USB switching chip in the second-stage USB switching alternative circuit, the output end of the third USB switching chip of the first-stage USB switching alternative circuit is connected with the input end of the first USB switching chip of the third-stage USB switching alternative circuit, the output end of the first USB switching chip of the second-stage USB switching alternative circuit is connected with the input end of the first USB switching chip of the third-stage USB switching alternative circuit, the output ends of a fourth USB switching chip and a fifth USB switching chip of the first-stage USB switching alternative circuit are connected with the input end of a second USB switching chip of the second-stage USB switching alternative circuit, the output end of the second USB switching chip of the second-stage USB switching alternative circuit is connected with the input end of a second USB switching chip of the third-stage USB switching alternative circuit, and the output end of a sixth USB switching chip of the first-stage USB switching alternative circuit is connected with the input end of the second USB switching chip of the third-stage USB switching alternative circuit;
each USB switching chip uses TS3USB221A from TI corporation, and the USB switching chip can output USB signals alternatively. The PS/2 keyboard and mouse signals input from the outside are converted into USB signals through the PS/2 to USB module, and the USB signals are interconnected with the 2 paths of USB signals which are gated out. The PS/2-to-USB chip is CSC0101A-S16, and can convert the USB signal selected out into a PS/2 signal. A schematic diagram of the USB switch module and the PS/2 to USB module is shown in FIG. 4.
The display control switching method receives a switching control command through a gigabit Ethernet, then processes the received command through a CPU and sends the processed command to the FPGA, the FPGA controls a DP switching module and a USB switching module to process DP video signals of 6 paths of computer modules which are completely consistent with each other and are connected with an exchange board, USB keyboard signals and mouse signals in real time, switches and converts the signals and then outputs 1 path of VGA signals and 2 paths of PS/2 signals to be led out of a VPX case, and debugging and controlling 6 computer modules by using a set of PS/2 keyboard, mouse and VGA display equipment are realized.
The DP switching module and the USB switching module are both constructed by a plurality of one-out-of-multiple signal selectors. After the CPU processor of the switch board module receives and processes the network message with the display control switching command through the Ethernet interface, the LPC bus interacts with the FPGA to convert the control command into a logic control signal of a switching circuit, and then a signal selector in the switching module is controlled to perform corresponding hardware switching operation on the video signal and the USB signal.
Therefore, the method reduces the using amount of the display control equipment of the multi-computer-board VPX case in the debugging process, greatly reduces the demand of the display control debugging interface of the VPX case, and realizes that one set of display control debugging interface can display, operate and debug all computers.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A multi-computer display control switching method for a VPX case is characterized in that the display control switching method is realized by matching 2 power supply modules, 6U computer modules, 1 exchange board module and 1 VPX bus bottom board in the VPX case, the VPX bus bottom board is fixed in the VPX case and is interconnected with the power supply modules, the computer modules and the exchange board module through VPX connectors, and the VPX bus bottom board provides interconnection of signals among the board cards and leads the signals out of the case shell;
the power supply module is used for converting externally input 220V alternating current into 12V or 5V direct current required by the work of each board card;
the exchange board module has Ethernet exchange function and display control switching function, and can process and switch DP video signals of 6 paths of computer modules which are completely consistent and are connected with the exchange board module in real time with USB keyboard and mouse signals, and then lead out the signals to the outside of the VPX case, so that a set of PS/2 keyboard, mouse and VGA display equipment is used for debugging and controlling 6 computer modules.
2. The method of claim 1, wherein the switch board module comprises a CPU, an FPGA, a DP display switching module, a USB switching module, a DP to VGA circuit, a PS/2 to USB module; the switching board module receives a control instruction with a display control switching command through an Ethernet port, the control instruction with the display control switching command is sent to the FPGA after being processed by the CPU, the FPGA controls a DP display switching module, a USB switching module, a DP to VGA circuit and a PS/2 to USB module in the switching board module to complete display control switching work, and outputs 1 path of VGA signal and 2 paths of PS/2 signals to be led out of the VPX case;
the FPGA carries out DP video switching on 6 paths of DP display signals output by 6 computer modules through logic control, one path of DP signal is selected after being selected by a three-level two-way circuit in the DP display switching module during switching, then one path of VGA signal is converted and output through a DP to VGA circuit, and the converted VGA signal is output to a debugging area of a VPX case to be connected with a display for displaying; the three-stage one-out-of-two circuit consists of three DP switching 1-out-of-2 modules connected in parallel at a first stage, one DP switching 1-out-of-2 module at a second stage and one DP switching 1-out-of-2 module at a third stage, wherein the output ends of two DP switching 1-out-of-2 modules at the first stage are connected with the input end of the second DP switching 1-out-of-2 module at the second stage, and the output ends of the second DP switching 1-out-of-2 module at the second stage and the third DP switching 1-out-of-2 module at the first stage are connected with the input end of the third;
the 12 paths of USB signals of the 6 computer modules are divided into two parts, and 2 paths of USB signals are selected through a three-level USB switching alternative circuit through logic control of the FPGA; the three-stage USB switching alternative circuit consists of a first-stage USB switching alternative circuit, a second-stage USB switching alternative circuit and a third-stage USB switching alternative circuit, wherein the first-stage USB switching alternative circuit consists of six USB switching chips, the second-stage USB switching alternative circuit consists of two USB switching chips, and the third-stage USB switching alternative circuit consists of two USB switching chips, wherein the output ends of the first and second USB switching chips of the first-stage USB switching alternative circuit are connected with the input end of the first USB switching chip in the second-stage USB switching alternative circuit, the output end of the third USB switching chip of the first-stage USB switching alternative circuit is connected with the input end of the first USB switching chip of the third-stage USB switching alternative circuit, the output end of the first USB switching chip of the second-stage USB switching alternative circuit is connected with the input end of the first USB switching chip of the third-stage USB switching alternative circuit, the output ends of the fourth and fifth USB switching chips of the first USB switching alternative circuit are connected with the input end of the second USB switching chip of the second USB switching alternative circuit, the output end of the second USB switching chip of the second USB switching alternative circuit is connected with the input end of the second USB switching chip of the third USB switching alternative circuit, and the output end of the sixth USB switching chip of the first USB switching alternative circuit is connected with the input end of the second USB switching chip of the third USB switching alternative circuit.
3. The method of claim 1, wherein the power supply module adopts a redundant design of dual power supplies, and two power supply modules are interconnected through an internal current sharing circuit control pin; the output of the power supply module has the functions of short-circuit protection, overcurrent protection and overvoltage protection, and when one power supply module breaks down, the output port of the power supply module is automatically cut off.
4. The method of claim 2, wherein each DP switch 1-out-of-2 module selects chip HD3SS 14; in the DP to VGA circuit, the selected video conversion chip is CH7517, and a VGA signal driver realized by LT6557IGN is added in the DP to VGA circuit.
5. The method as claimed in claim 2, wherein each USB switch chip uses TS3USB221A of TI corporation, and the USB switch chip can output the USB signal alternatively.
6. The method as claimed in claim 2, wherein the externally inputted PS/2 keyboard-mouse signal is converted into USB signal by PS/2 to USB module, and interconnected with the 2-channel USB signal.
7. The method of claim 2, wherein the PS/2 to USB chip is a CSC0101A-S16, which converts gated USB signals to PS/2 signals.
8. A display control switching system for implementing the method of any one of claims 1 to 7.
9. The system of claim 8, wherein the system consists of 2 power modules, 6U computer modules, 1 switch board module, 1 VPX bus backplane within a VPX chassis.
10. Use of the system according to claim 8 or 9 in the field of VPX module display control technology.
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