CN112367375B - Multi-terminal safety display system based on FPGA - Google Patents
Multi-terminal safety display system based on FPGA Download PDFInfo
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- CN112367375B CN112367375B CN202011167574.XA CN202011167574A CN112367375B CN 112367375 B CN112367375 B CN 112367375B CN 202011167574 A CN202011167574 A CN 202011167574A CN 112367375 B CN112367375 B CN 112367375B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/104—Peer-to-peer [P2P] networks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/76—Architectures of general purpose stored program computers
- G06F15/78—Architectures of general purpose stored program computers comprising a single central processing unit
- G06F15/7807—System on chip, i.e. computer system on a single chip; System in package, i.e. computer system on one or more chips in a single package
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention discloses a multi-terminal safety display system based on an FPGA, which comprises a host display control end and at least two remote display control ends; the host display control end and the remote display control end both comprise control units based on FPGA; the host display control end is respectively connected with each remote display control end through a tera Ethernet point-to-point communication; the control unit of the host display control end is used for generating information data packets from interface information data and sending the information data packets to the remote display control end; and the control unit of each remote display control end is used for receiving the information data packet and displaying a corresponding interface. In the invention, the host display control end and each remote display control end respectively transmit data to each other in a point-to-point manner through the tera Ethernet point to construct a monitoring control network, thereby realizing the real-time data monitoring and control of different devices in different places.
Description
Technical Field
The invention relates to the technical field of display, in particular to a multi-terminal safety display system based on an FPGA (field programmable gate array).
Background
With the development of information technology, more and more fields are applied to monitoring and control of display systems, such as in the field of security, particularly in the fields of nuclear power plant security level instrument control systems, industrial control fields and military industry. The display terminal monitors the running data of the equipment and controls the equipment according to the data information, so that the safety of the equipment is ensured. However, the existing display terminals are often a device for monitoring and controlling a terminal, so that the devices cannot be monitored and controlled in real time under the condition that the number of the devices such as a safety level instrument control system of a nuclear power station and a bank is large or the devices are not in the same place, the safety of the devices cannot be ensured, and the existing implementation mode is poor in long-distance display effect.
Disclosure of Invention
The invention aims to overcome the defects that in the prior art, a display system cannot monitor and control equipment in real time under the condition that the number of the equipment is large or the equipment is not in the same place, and the equipment safety cannot be ensured.
The invention solves the technical problems by the following technical scheme:
the invention provides a multi-terminal safety display system based on an FPGA, which comprises a host display control end and at least two remote display control ends;
the host display control end and the remote display control end both comprise control units based on FPGA;
the host display control end and each remote display control end are respectively connected through a tera Ethernet point-to-point communication;
the control unit of the host display control end is used for generating an information data packet from interface information data and sending the information data packet to the remote display control end;
and the control unit of each remote display control end is used for receiving the information data packet and displaying a corresponding interface.
Preferably, the control unit of the host display control end comprises a first communication interface module, and the control unit of the remote display control end comprises a second communication interface module;
the first communication interface module comprises at least one first network port;
the second communication interface module comprises a second network port;
the second network port of each second communication interface module is connected with the first communication interface module through a tera Ethernet point-to-point.
Preferably, the multi-terminal security display system further comprises a switch, and the second network port of each second communication interface module is connected with the first network port of the first communication interface module through the switch.
Preferably, the remote display and control end further comprises a second input device, the control unit of the remote display and control end further comprises a second analysis module and a second group of packet sending modules, the host display and control end further comprises a first display device, and the control unit of the host display and control end further comprises a framing function module, a first group of packet sending modules, a first receiving and unpacking module and a first display driving module;
the second input device is used for sending a control command to the control unit of the corresponding remote display control end;
the second parsing module is used for generating a corresponding control data packet from the received control command and sending the control data packet to the second packet sending module;
the second packet sending module is used for sending the received control data packet to a control unit of the host display control end;
the framing function module is used for forming the interface information data into a display frame;
the first packet sending module is used for generating the information data packet from the display frame and sending the information data packet to the remote display control end;
the first receiving and unpacking module is used for receiving a control data packet sent by the remote display control end;
the first display driving module is used for sending the display frame to the first display device;
the first display device is configured to receive the display frame and display a corresponding interface.
Preferably, the remote display control end further comprises a second display device, and the control unit of the remote display control end further comprises a second receiving unpacking module and a second display driving module;
the second receiving and unpacking module is used for receiving the information data packet;
the second display driving module is used for sending the received information data packet to the second display device;
the second display device is used for displaying an interface corresponding to the information data packet.
Preferably, the multi-terminal safety display system further comprises an external system, and the control unit of the host display control end is further used for setting all working modes of the remote display control end, wherein the working modes comprise a master-slave mode;
when the working mode is the master-slave mode, all the remote display and control ends comprise a first remote display and control end in the master mode, and the rest remote display and control ends are second remote display and control ends in the slave mode;
the first remote display and control end and the second remote display and control end are used for displaying the interface;
the first remote display and control end is further used for generating a corresponding control data packet from the control command received from the corresponding second input device and sending the corresponding control data packet to the host display and control end;
the host display control end is also used for receiving the control data packet and controlling the external system.
Preferably, the second remote display and control end is further configured to send a mode switching request to the host display and control end;
the host display and control end is also used for receiving the mode switching request and setting the working mode of the second remote display and control end sending the request as a master mode, and the rest remote display and control ends are set as slave modes.
Preferably, the working mode further comprises a peer-to-peer mode, and when the working mode is the peer-to-peer mode, the remote display and control ends all display the same interface;
when the working mode is the peer-to-peer mode, each remote display and control end is further used for generating a corresponding control data packet by the control command sent by the corresponding second input device and sending the corresponding control data packet to the host display and control end.
Preferably, the information data packet includes a sequence number, a display mode, a frame start flag, display data, an end of frame flag, and a CRC (cyclic redundancy check) check; and/or the number of the groups of groups,
the control command data packet comprises a display control end number, a serial number, a data type, a data length, external equipment command data and CRC.
Preferably, the host display control end further comprises a first input device, and the control unit of the host display control end further comprises a first analysis module;
the first input device is used for sending a control command to a control unit of the host display control end;
the first analysis module is used for generating a corresponding control data packet from the control command sent by the first input device;
the host display control end is also used for controlling the external system according to the control data packet generated by the first analysis module;
the first input device and the second input device each comprise at least one of a mouse, a keyboard, and a trackball.
The invention has the positive progress effects that: the invention sets a host display control end and at least two remote display control ends in different places, and the host display control end and each remote display control end respectively transmit data to each other through a tera Ethernet point to construct a monitoring control network, thereby realizing the real-time data monitoring and control of different devices in different places, simultaneously realizing the joint operation of different devices in different places through hardware circuits based on FPGA without any CPU (central processing unit), operating system and software support, avoiding the invasion of hackers and viruses, and greatly improving the safety of the devices.
Drawings
Fig. 1 is a schematic structural diagram of an FPGA-based multi-terminal security display system according to a preferred embodiment of the present invention.
Fig. 2 is a schematic diagram of a topology connection of an FPGA-based multi-terminal security display system according to a preferred embodiment of the present invention.
Fig. 3 is a schematic diagram of a master-slave mode structure of an FPGA-based multi-terminal security display system according to a preferred embodiment of the present invention.
Fig. 4 is a schematic diagram of peer-to-peer mode structure of an FPGA-based multi-terminal security display system according to a preferred embodiment of the present invention.
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention.
The embodiment provides a multi-terminal security display system based on an FPGA, as shown in FIG. 1, the multi-terminal security display system comprises a host display control end 1 and at least two remote display control ends 2 positioned at different places. The host display control end 1 and each remote display control end 2 comprise a control unit based on an FPGA. Specifically, the control unit 3 of the host display control end 1 and the control unit 4 of the remote display control end 2. The host display control end 1 and each remote display control end 2 are respectively connected through the tera Ethernet point-to-point communication.
In this embodiment, the control unit 3 of the FPGA of the host display and control end 1 may select XC7K325T (a type of FPGA control chip of Xilinx corporation), and the control unit 4 of the FPGA of the remote display and control end 2 may select XC7a25T (a type of FPGA control chip of Xilinx corporation).
In this embodiment, the interface design terminal 13 provides the interface information data to the control unit 3 of the host display and control end 1, the control unit 3 of the host display and control end 1 is configured to generate an information data packet for the interface information data and send the information data packet to the remote display and control end 2, and the control unit 4 of each remote display and control end 2 is configured to receive the information data packet and display a corresponding interface. The multi-terminal safety display system uses a host display control end and a remote display control end which are formed by the FPGA-based control units, so that the system is ensured to be free of any CPU, operating system and software support when in operation, is not easy to attack by hackers and viruses, and realizes real-time data display and control in different places by utilizing a hardware technology.
The control unit 3 of the FPGA of the host display and control end 1 comprises a first communication interface module 5, the control unit 4 of the FPGA of the remote display and control end 2 comprises a second communication interface module 6, the first communication interface module 5 comprises at least one first network port, and the second communication interface module 6 comprises a second network port.
In this embodiment, the second network port of each second communication interface 6 module is connected to the first communication interface module 5 through a multi-megaethernet point-to-point, and the communication protocol used is a TCP (transmission control protocol) protocol, and data transmission is performed through an optical fiber, so that the host display control end and the remote display control end can perform remote information transmission.
In other alternative implementations, as shown in fig. 2, the multi-terminal security display system may further include a switch 7, and the second portal of the second communication interface module 6 may also be connected to the first portal of the first communication interface module 5 through the switch 7. Through setting up the switch, the host computer display and control end supports at most and connects 128 remote display and control ends, has reached only needs a host computer display and control end just can cooperate many remote display and control end monitoring and control equipment for many terminal safety display system have realized redundant display, redundant control, be convenient for hierarchical management.
As shown in fig. 1, the remote display and control end 2 further includes a second input device 81, the control unit of the remote display and control end 2 further includes a second parsing module 83 and a second packet transmission module 41, the host display and control end 1 further includes a first display device 11, and the control unit 3 of the host display and control end 1 further includes a framing function module 31, a first packet transmission module 32, a first receiving and unpacking module 33 and a first display driving module 34.
The second input device 81 is configured to issue a control command to the control unit 4 of the corresponding remote display control terminal 2. In this embodiment, the second input device 81 comprises at least one of a mouse, a keyboard, and a trackball, and PS/2 (an input apparatus interface) is used as the interface of the second input device 81.
The second parsing module 83 is configured to generate a corresponding control data packet from the received control command and send the control data packet to the second packet sending module 41.
The second packet sending module 41 is configured to send the received control data packet to the control unit 3 of the host display control end 1.
The framing function module 31 is configured to compose the interface information data into a display frame.
The first packet sending module 32 is configured to send the display frame generation information packet to the remote display control end 2.
The first receiving and unpacking module 33 is configured to receive a control data packet sent by the remote display control end 2.
The first display driving module 34 is used for transmitting the display frame to the first display device 11.
The first display device 11 is configured to receive the display frame and display a corresponding interface.
In the present embodiment, the first display device 11 may be a liquid crystal display, using DVI (digital video interface) as a display interface.
The remote display control end 2 further comprises a second display device 21, and the control unit 4 of the remote display control end further comprises a second receiving and unpacking module 42 and a second display driving module 43.
The second receive and unpack module 42 is configured to receive the information data packet.
The second display driving module 43 is configured to send the received information data packet to the second display device 21.
The second display device 21 is configured to display an interface corresponding to the information data packet.
In this embodiment, the second display device 21 may be a liquid crystal display, using DVI as a display interface.
Specifically, referring to fig. 1 and 3, the multi-terminal security display system further includes an external system 12, and the host display and control end 1 is further configured to set all working modes in which the remote display and control end 2 is located, where the working modes include a master-slave mode.
When the working mode is the master-slave mode, all the remote display and control ends 2 comprise a first remote display and control end 201 in the master mode, and the rest remote display and control ends 2 are second remote display and control ends 202 in the slave mode.
The first remote display and control end 201 and the second remote display and control end 202 are both used for displaying an interface.
The first remote display and control end 201 is further configured to generate a corresponding control data packet from the control command received from the corresponding second input device and send the control data packet to the host display and control end 1.
The host display control terminal 1 is further configured to receive a control data packet and control the external system 12.
In this implementation, the external system 12 may be a distributed control system with a combination of hardware and software.
The second remote display and control end 202 is further configured to send a mode switching request to the host display and control end 1.
The host display and control end 1 is further configured to receive a mode switching request and set an operation mode of the second remote display and control end 202 that sends the request to a master mode, and the remaining remote display and control ends 2 are set to slave modes.
In this embodiment, the second remote display and control end 202 in the slave mode may double-click the mouse to send a mode switching request to the host display and control end 1, and after the host display and control end 1 receives the request, the current master mode of the first remote display and control end 201 is cancelled and set as the slave mode, and at the same time, the host display and control end 1 sets the second remote display and control end 202 sending the mode switching request as the first remote display and control end 201, and each remote display and control end 2 displays the number of the remote display and control end currently in the master mode. By setting the master-slave mode, the operation control command of the remote display control end in the master mode is ensured not to be interfered by mistake, and the control accuracy of the remote display control end to an external system is ensured.
In other alternative implementations, as shown in fig. 4, the operation mode may further include a peer-to-peer mode, where the remote display control terminals 2 all display the same interface when the operation mode is the peer-to-peer mode.
When the working mode is the peer-to-peer mode, each remote display and control end 2 is further configured to generate a corresponding control data packet by using the control command sent by the corresponding second input device 81, and send the corresponding control data packet to the host display and control end 1.
In this embodiment, all the second input devices 81 in the remote display and control terminals 2 in the peer-to-peer mode can send control commands to the host display and control terminal 1, and each remote display and control terminal 2 displays the same interface, wherein the control command operations are in sequence. The remote display and control end in the peer-to-peer mode can directly perform corresponding operation without applying, and control of the remote display and control end on an external system at the first time is ensured.
In this embodiment, the host display and control end 1 further includes a first input device 82, and the control unit 3 of the host display and control end 1 further includes a first parsing module 84.
The first input device 82 is used for sending a control command to the control unit 3 of the host display control terminal 1.
The first parsing module 84 is configured to generate a corresponding control data packet according to a control command sent by the first input device 82.
The host display control end 1 is further configured to control the external system 12 according to the control data packet generated by the first parsing module 84.
The first input device 82 includes at least one of a mouse, a keyboard, a trackball, and uses PS/2 as the first input device interface.
In particular, the communication protocol for the information data packet sent by the host display control end can be as follows
| Display control terminal number |
| Sequence number |
| Data type |
| Data length |
| Mouse data |
| CRC check |
The following field is implemented, specifically, the following table:
field description:
sequence number: and 1 is automatically added after each frame is sent out, and whether packet loss exists or not is judged.
Display mode: the remote display control end analyzes the data packet according to the display mode.
Frame start flag: the start of a frame.
Displaying data: RGB (one color system) data of a frame.
End of frame marker: the end of one frame.
CRC check: judging whether the data packet has errors or not in the transmission process, and starting calculation from the sequence number field.
For the communication protocol of the control data packet sent by the remote display control end, the following table is specific:
| sequence number |
| Display mode |
| Frame start marker |
| Displaying data |
| End of frame marker |
| CRC check |
Field description:
sequence number: sequence number of data packet. And 1 is automatically added after each frame is sent out, and whether packet loss exists or not is judged.
Data type: indicating whether it is mouse data or keyboard data.
Data length: the total length of the data packet.
Mouse data: clicking, double clicking, pressing, releasing, moving, rolling and other information of the mouse.
CRC check: and judging whether the data packet has errors or not in the transmission process. Calculation starts from the sequence number field.
Similarly, the communication protocol of the control data packet of the keyboard and the track ball should also meet the requirements shown in the table, wherein the keyboard data is ASSIC (American Standard code for information interchange) code of keyboard keys, and the track ball data is information such as single click, double click, press, release, movement, rolling of the track ball and the like.
In the embodiment, by arranging a host display control end and at least two remote display control ends which are positioned in different places, the host display control end and each remote display control end respectively transmit data to each other through a multi-megaEthernet point to point, a monitoring control network is constructed, so that the real-time data monitoring and control of different devices in different places are realized, meanwhile, the FPGA is based on the joint operation of the FPGA through a hardware circuit, no CPU, operation system and software support are needed, the invasion of hackers and viruses is avoided, and the safety of the device is greatly improved.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (8)
1. The multi-terminal safety display system based on the FPGA is characterized by comprising a host display control end and at least two remote display control ends in different places;
the host display control end and the remote display control end both comprise control units based on FPGA;
the host display control end and each remote display control end are respectively connected through a tera Ethernet point-to-point communication;
the control unit of the host display control end is used for generating an information data packet from interface information data and sending the information data packet to the remote display control end;
the control unit of each remote display control end is used for receiving the information data packet and displaying a corresponding interface;
the remote display control end further comprises second display equipment, and the control unit of the remote display control end further comprises a second receiving unpacking module and a second display driving module;
the second receiving and unpacking module is used for receiving the information data packet;
the second display driving module is used for sending the received information data packet to the second display device;
the second display device is used for displaying an interface corresponding to the information data packet;
the remote display control end further comprises a second input device, the control unit of the remote display control end further comprises a second analysis module and a second packet sending module, the host display control end further comprises a first display device, and the control unit of the host display control end further comprises a framing function module, a first packet sending module, a first receiving and unpacking module and a first display driving module;
the second input device is used for sending a control command to the control unit of the corresponding remote display control end;
the second parsing module is used for generating a corresponding control data packet from the received control command and sending the control data packet to the second packet sending module;
the second packet sending module is used for sending the received control data packet to a control unit of the host display control end;
the framing function module is used for forming the interface information data into a display frame;
the first packet sending module is used for generating the information data packet from the display frame and sending the information data packet to the remote display control end;
the first receiving and unpacking module is used for receiving a control data packet sent by the remote display control end;
the first display driving module is used for sending the display frame to the first display device;
the first display device is configured to receive the display frame and display a corresponding interface.
2. The FPGA-based multi-terminal secure display system of claim 1, wherein the control unit of the host display control end comprises a first communication interface module, and the control unit of the remote display control end comprises a second communication interface module;
the first communication interface module comprises at least one first network port;
the second communication interface module comprises a second network port;
the second network port of each second communication interface module is connected with the first communication interface module through a tera Ethernet point-to-point.
3. The FPGA-based multi-terminal secure display system of claim 2, further comprising a switch through which the second portal of each of the second communication interface modules is connected to the first portal of the first communication interface module.
4. The FPGA-based multi-terminal secure display system of claim 1, further comprising an external system, wherein the control unit of the host display control end is further configured to set all working modes in which the remote display control end is located, the working modes including a master-slave mode;
when the working mode is the master-slave mode, all the remote display and control ends comprise a first remote display and control end in the master mode, and the rest remote display and control ends are second remote display and control ends in the slave mode;
the first remote display and control end and the second remote display and control end are used for displaying the interface;
the first remote display and control end is further used for generating a corresponding control data packet from the control command received from the corresponding second input device and sending the corresponding control data packet to the host display and control end;
the host display control end is also used for receiving the control data packet and controlling the external system.
5. The FPGA-based multi-terminal secure display system of claim 4, wherein the second remote display and control end is further configured to send a mode switching request to the host display and control end;
the host display and control end is also used for receiving the mode switching request and setting the working mode of the second remote display and control end sending the request as a master mode, and the rest remote display and control ends are set as slave modes.
6. The FPGA-based multi-terminal secure display system of claim 5, wherein the operating mode further comprises a peer-to-peer mode, and when the operating mode is a peer-to-peer mode, the remote display and control ends all display the same interface;
when the working mode is the peer-to-peer mode, each remote display and control end is further used for generating a corresponding control data packet by the control command sent by the corresponding second input device and sending the corresponding control data packet to the host display and control end.
7. The FPGA-based multi-terminal secure display system of claim 6, wherein the information data packet comprises a sequence number, a display mode, a start of frame marker, display data, an end of frame marker, and a CRC check; and/or the number of the groups of groups,
the control command data packet comprises a display control end number, a serial number, a data type, a data length, external equipment command data and CRC.
8. The FPGA-based multi-terminal secure display system of claim 4, wherein the host display and control end further comprises a first input device, and the control unit of the host display and control end further comprises a first parsing module;
the first input device is used for sending a control command to a control unit of the host display control end;
the first analysis module is used for generating a corresponding control data packet from the control command sent by the first input device;
the host display control end is also used for controlling the external system according to the control data packet generated by the first analysis module;
the first input device and the second input device each comprise at least one of a mouse, a keyboard, and a trackball.
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