CN115499059A - Airborne conversion equipment for communication access of asynchronous RS422 and synchronous RS422 to optical fiber bus - Google Patents

Airborne conversion equipment for communication access of asynchronous RS422 and synchronous RS422 to optical fiber bus Download PDF

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Publication number
CN115499059A
CN115499059A CN202211036486.5A CN202211036486A CN115499059A CN 115499059 A CN115499059 A CN 115499059A CN 202211036486 A CN202211036486 A CN 202211036486A CN 115499059 A CN115499059 A CN 115499059A
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China
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module
bus
synchronous
asynchronous
communication
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CN202211036486.5A
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Chinese (zh)
Inventor
许永辉
郝光耀
孟若彤
李乐天
杨昌达
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China Shipbuilding Corp Comprehensive Technical And Economic Research Institute
Harbin Institute of Technology
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China Shipbuilding Corp Comprehensive Technical And Economic Research Institute
Harbin Institute of Technology
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Priority to CN202211036486.5A priority Critical patent/CN115499059A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2589—Bidirectional transmission
    • H04B10/25891—Transmission components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/40—Transceivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
    • H04B10/801—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water using optical interconnects, e.g. light coupled isolators, circuit board interconnections
    • H04B10/802—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water using optical interconnects, e.g. light coupled isolators, circuit board interconnections for isolation, e.g. using optocouplers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/08—Protocols for interworking; Protocol conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Security & Cryptography (AREA)
  • Communication Control (AREA)

Abstract

An airborne conversion device for communication access of an asynchronous RS422 and a synchronous RS422 to an optical fiber bus relates to the technical field of communication. The problem of large-scale solar unmanned aerial vehicle use asynchronous RS422 interface and synchronous RS422 interface, and can't realize fiber communication is solved. The invention comprises a core processor, a global bus module and a local bus module; the core processor is respectively connected with the global bus module and the local bus module; the core processor comprises a DSP module, an FPGA module and an EMI bus; the EMIF bus is used for connecting the DSP module and the FPGA module and realizing data transmission between the DSP module and the FPGA module; the global bus module comprises an EMIF interface, is connected with the EMIF bus through the EMIF interface and is used for realizing optical fiber communication data transmission; the local bus module comprises asynchronous RS422 bus communication and synchronous RS422 bus communication; and the asynchronous RS422 bus communication and the synchronous RS422 bus communication are respectively connected with the FPGA module and are used for realizing the transmission of asynchronous communication data and synchronous communication data. The invention is suitable for communication of airborne data of the unmanned aerial vehicle.

Description

Airborne conversion equipment for communication access of asynchronous RS422 and synchronous RS422 to optical fiber bus
Technical Field
The invention relates to the technical field of communication, in particular to the technical field of unmanned aerial vehicle communication.
Background
In large-scale solar energy unmanned aerial vehicle, also higher and higher along with the rapid development of electronic technology to the requirement of bus, compare in traditional bus, optical fiber communication has advantages such as transmission rate is high, transmission distance is big, compatibility is good, and based on above advantage, optical fiber communication begins to popularize and apply in unmanned aerial vehicle equipment gradually. However, most of the existing large-scale solar unmanned aerial vehicles still adopt a large amount of traditional buses, such as: and the asynchronous RS422 interface and the synchronous RS422 interface can not realize optical fiber communication. And the asynchronous RS422 interface and the synchronous RS422 interface have lower transmission rate, small transmission distance and poor compatibility. If all asynchronous RS422 interfaces and synchronous RS422 interfaces of all airborne equipment are upgraded into optical fiber interfaces, the existing airborne equipment without the optical fiber interfaces needs to be developed again, the cost of version changing and upgrading is very high, and the version changing and upgrading period is long.
Therefore, it is urgently needed to provide an airborne conversion device, which converts the synchronous RS422 interface and the asynchronous RS422 interface into optical fiber interfaces, can directly access airborne devices without optical fiber interfaces to an optical fiber network, can effectively reduce research and development costs, and shortens a development cycle.
Disclosure of Invention
The invention provides airborne conversion equipment for accessing asynchronous RS422 and synchronous RS422 communication into an optical fiber bus, which solves the problem that optical fiber communication cannot be realized because an asynchronous RS422 interface and a synchronous RS422 interface are used by the existing large-scale solar unmanned aerial vehicle.
In order to achieve the purpose, the invention provides the following scheme:
an airborne conversion device for communication access of an asynchronous RS422 and a synchronous RS422 to a fiber bus comprises a core processor, a global bus module and a local bus module;
the core processor is respectively connected with the global bus module and the local bus module;
the core processor comprises a DSP module, an FPGA module and an EMIF bus;
the EMIF bus is used for connecting the DSP module and the FPGA module and realizing data transmission between the DSP module and the FPGA module;
the global bus module comprises an EMIF interface, and is connected with the EMIF bus through the EMIF interface and used for realizing optical fiber communication data transmission;
the local bus module comprises asynchronous RS422 bus communication and synchronous RS422 bus communication;
the asynchronous RS422 bus communication is connected with the FPGA module and is used for realizing asynchronous communication data transmission;
and the synchronous RS422 bus communication is connected with the FPGA module and is used for realizing synchronous communication data transmission.
Further, in a preferred embodiment, the DSP module includes a DSP core and an EMIF bus interface;
and the DSP core is connected with the EMIF bus interface and is used for converting asynchronous RS422 communication data and synchronous RS422 communication data into optical fiber communication data.
Further, in a preferred embodiment, the global bus module further includes an optical fiber protocol control module and an optical module;
the optical module is used for receiving and transmitting link signals and realizing the conversion of photoelectric signals;
the optical fiber protocol control module is respectively connected with the optical module and the DSP module and is used for realizing the analysis of a transmission protocol and realizing the data transmission between the optical fiber protocol control module and the DSP module through an EMIF interface.
Further, in a preferred embodiment, the optical fiber protocol control module further includes a serial data transceiver circuit, a protocol analysis module, a storage circuit, and an interface switching circuit;
the serial data transceiver circuit is connected with the optical module and used for receiving a link signal of the optical module;
the serial data receiving and transmitting circuit sends the received link signals to the protocol analysis module, the protocol analysis module sends the link signals to the storage circuit for storing the link signals, and the link signals are converted into EMIF link signals through the interface switching circuit and sent to the DSP module through an EMIF interface.
Further, there is a preferred embodiment, in which the protocol parsing module includes a data transmission module and an instruction transmission module;
the data transmission module is used for receiving and transmitting data information;
the instruction transmission module is used for receiving and transmitting instruction information.
Further, in a preferred embodiment, the memory circuit includes a register circuit and a data storage circuit;
the register circuit is a static storage circuit and is used for storing data information;
the data storage circuit is a dynamic storage circuit and can be externally connected with an SD card to realize the transfer of data information.
Further, in a preferred embodiment, the asynchronous RS422 bus communication includes an asynchronous RS422 isolation transceiver and an asynchronous RS422 serial logic unit;
the asynchronous RS422 serial logic unit is used for realizing the analysis of an asynchronous communication protocol;
the asynchronous RS422 isolation transceiver is used for realizing level conversion of signals, and asynchronous communication data transmission between the asynchronous RS422 isolation transceiver and the FPGA module is realized through the asynchronous RS422 serial logic unit.
Further, in a preferred embodiment, the above-mentioned asynchronous RS422 isolation transceiver is implemented by using an ADM2682E chip.
Further, in a preferred embodiment, the RS422 bus communication includes an RS422 isolator transceiver and an RS422 serial logic unit;
the synchronous RS422 serial logic unit is used for realizing the analysis of a synchronous communication protocol;
the synchronous RS422 isolation transceiver is used for realizing level conversion of signals, and synchronous communication data transmission between the synchronous RS422 isolation transceiver and the FPGA module is realized through the synchronous RS422 serial logic unit.
Further, in a preferred embodiment, the synchronous RS422 isolating transceiver is implemented by using an ADM2682E chip.
Technical effects
The invention provides airborne conversion equipment for accessing asynchronous RS422 and synchronous RS422 communication into an optical fiber bus, which solves the problem that optical fiber communication cannot be realized because a large number of traditional unmanned aerial vehicles greatly use asynchronous RS422 interfaces and synchronous RS422 interfaces.
Compared with the prior art, the following advantages are produced:
1. the existing large-sized solar unmanned aerial vehicle starts to use optical fiber communication, and most of existing airborne equipment are synchronous RS422 interfaces and asynchronous RS422 interfaces, so that the existing large-sized solar unmanned aerial vehicle cannot be accessed into a communication network of the unmanned aerial vehicle. If all asynchronous RS422 interfaces and synchronous RS422 interfaces of all airborne equipment are upgraded to optical fiber interfaces, the existing airborne equipment without the optical fiber interfaces needs to be developed again, the cost of version change and upgrade is very high, and the version change and upgrade period is long. The invention provides airborne conversion equipment for accessing communication of an asynchronous RS422 interface and a synchronous RS422 interface into an optical fiber bus, which can directly access airborne equipment of the asynchronous RS422 interface and the synchronous RS422 interface into an optical fiber network, realize the function of optical fiber communication and solve the problem of upgrading of an internal communication network of an unmanned aerial vehicle at lower cost.
2. The invention provides airborne conversion equipment for communication access of an asynchronous RS422 and a synchronous RS422 to an optical fiber bus, which utilizes a core processor to connect a global bus module and a local bus module and realizes conversion from the local bus module to the global bus module protocol data of an unmanned aerial vehicle flight control system, wherein the core processor comprises a DSP module and an FPGA module, the global bus module is integrated on the DSP module, and the local bus module is integrated on the FPGA module.
3. The invention provides airborne conversion equipment for accessing asynchronous RS422 and synchronous RS422 to an optical fiber bus in a communication way, an optical fiber protocol control module is realized by selecting a BK-SC1720ME chip, the airborne conversion equipment has a high-reliability and strong-instantaneity data transmission function, has an EMIF interface, can also have two interfaces of PCIE and SPI, can realize data transmission with various processors, and can meet various application scenes.
The invention is suitable for communication of airborne data of the unmanned aerial vehicle.
Drawings
Fig. 1 is an electrical schematic diagram of an airborne switching device for communication access of an asynchronous RS422 and a synchronous RS422 to a fiber optic bus according to the first and second embodiments.
Fig. 2 is an electrical schematic diagram of a fiber protocol control module according to embodiments three, four, five and six.
Fig. 3 is an electrical schematic diagram of an asynchronous RS422 communication interface according to the seventh embodiment.
Fig. 4 is an electrical schematic diagram of the synchronous RS422 communication interface according to the ninth embodiment.
Description of the preferred embodiment
Referring to fig. 1, the first embodiment is described, where the onboard switching device for communication access of the asynchronous RS422 and the synchronous RS422 to the optical fiber bus in the first embodiment includes a core processor, a global bus module, and a local bus module;
the core processor is respectively connected with the global bus module and the local bus module;
the core processor comprises a DSP module, an FPGA module and an EMIF bus;
the EMIF bus is used for connecting the DSP module and the FPGA module to realize data transmission between the DSP module and the FPGA module;
the global bus module comprises an EMIF interface, and is connected with the EMIF bus through the EMIF interface and used for realizing optical fiber communication data transmission;
the local bus module comprises asynchronous RS422 bus communication and synchronous RS422 bus communication;
the asynchronous RS422 bus communication is connected with the FPGA module and is used for realizing asynchronous communication data transmission;
and the synchronous RS422 bus communication is connected with the FPGA module and is used for realizing synchronous communication data transmission.
According to the airborne conversion equipment with the communication access of the asynchronous RS422 and the synchronous RS422 to the optical fiber bus, the global bus module and the local bus module are connected through the core processor, so that conversion from the local bus of the flight control system of the unmanned aerial vehicle to protocol data of the global bus is achieved, an electrical schematic diagram is shown in figure 1, the core processor comprises a DSP module, an FPGA module and an EMIF bus, data transmission between the DSP module and the FPGA module is achieved through the EMIF bus, the global bus module comprises an EMIF interface, the global bus module is connected with the EMIF bus through the EMIF interface, and then connection with the DSP module is achieved, and optical fiber communication data transmission is achieved; the local bus module comprises asynchronous RS422 bus communication and synchronous RS422 bus communication, the asynchronous RS422 bus communication is connected with the FPGA module to realize asynchronous communication data transmission, the synchronous RS422 bus communication is connected with the FPGA module to realize synchronous communication data transmission, and the local bus module is realized in the FPGA module and has the advantages of small volume and light weight. In practical application, the DSP module is realized by using an FT-M6678N chip, and the FPGA module is realized by using an SMQ7K325T chip, so that the integrated FPGA-based integrated circuit has the advantages of integration, small volume and light weight.
The existing large-sized solar unmanned aerial vehicle starts to use optical fiber communication, and most of existing airborne equipment are synchronous RS422 interfaces and asynchronous RS422 interfaces, so that the existing large-sized solar unmanned aerial vehicle cannot be accessed into a communication network of the unmanned aerial vehicle. If all asynchronous RS422 interfaces and synchronous RS422 interfaces of all airborne equipment are upgraded into optical fiber interfaces, the existing airborne equipment without the optical fiber interfaces needs to be developed again, the cost of version changing and upgrading is very high, and the version changing and upgrading period is long. The invention provides airborne conversion equipment for accessing communication of an asynchronous RS422 interface and a synchronous RS422 interface into an optical fiber bus, which can directly access airborne equipment of the asynchronous RS422 interface and the synchronous RS422 interface into an optical fiber network, realize the function of optical fiber communication and solve the problem of upgrading of an internal communication network of an unmanned aerial vehicle at lower cost.
Referring to fig. 1, the second embodiment is described, which illustrates a DSP module in an onboard conversion device for accessing communication between an asynchronous RS422 and a synchronous RS422 to an optical fiber bus according to the first embodiment, where the DSP module includes a DSP core and an EMIF bus interface;
the DSP core is connected with the EMIF bus interface and used for converting asynchronous RS422 communication data and synchronous RS422 communication data into optical fiber communication data.
In practical application of the embodiment, the DSP core is connected to the EMIF bus interface, and is configured to perform data analysis on the asynchronous RS422 communication data and the synchronous RS422 communication data, and convert the data into optical fiber communication data.
In a third embodiment, the present embodiment is described with reference to fig. 2, and is exemplified by a global bus module in an airborne conversion device in which the asynchronous RS422 and the synchronous RS422 in the first embodiment are communicatively connected to an optical fiber bus, where the global bus module further includes an optical fiber protocol control module and an optical module;
the optical module is used for receiving and transmitting link signals and realizing the conversion of photoelectric signals;
the optical fiber protocol control module is respectively connected with the optical module and the DSP module and is used for realizing the analysis of a transmission protocol and realizing the data transmission between the optical fiber protocol control module and the DSP module through an EMIF interface.
In practical application, the optical fiber protocol control module is connected to the optical module and the DSP module respectively, and is configured to implement parsing of a transmission protocol, and implement data transmission between the optical fiber protocol control module and the DSP module through an EMIF interface.
The fourth embodiment is described with reference to fig. 2, and this embodiment exemplifies an optical fiber protocol control module in an airborne conversion device for accessing asynchronous RS422 and synchronous RS422 communication to an optical fiber bus in the third embodiment, where the optical fiber protocol control module further includes a serial data transceiver circuit, a protocol analysis module, a storage circuit, and an interface switching circuit;
the serial data transceiver circuit is connected with the optical module and used for receiving a link signal of the optical module;
the serial data receiving and transmitting circuit sends the received link signals to the protocol analysis module, the protocol analysis module sends the link signals to the storage circuit for storing the link signals, and the link signals are converted into EMIF link signals through the interface switching circuit and sent to the DSP module through an EMIF interface.
In practical application, the serial data transceiver circuit receives a link signal of the optical module, transmits the link signal to the memory circuit, stores the link signal, transmits the link signal to the interface switching circuit for conversion, and transmits the converted link signal to the DSP module through the EMIF interface.
As shown in fig. 2. In practical application, the optical fiber protocol control module is realized by a BK-SC1720ME chip, has a high-reliability and strong-instantaneity data transmission function, can also have two interfaces of PCIE and SPI while having an EMIF interface, can realize data transmission with various processors, and can meet various application scenes.
The fifth embodiment is described with reference to fig. 2, and this embodiment exemplifies a protocol parsing module in the onboard conversion equipment for communication access to the optical fiber bus of the asynchronous RS422 and the synchronous RS422 according to the fourth embodiment, where the protocol parsing module includes a data transmission module and a command transmission module;
the data transmission module is used for receiving and transmitting data information;
the instruction transmission module is used for receiving and transmitting instruction information.
In practical application of the embodiment, the data transmission module is used for receiving and transmitting data information; the instruction transmission module is used for receiving and transmitting instruction information and has a data transmission function with high reliability and strong real-time performance.
The sixth embodiment is described with reference to fig. 2, and the present embodiment exemplifies a storage circuit in an onboard conversion device for communication access to an optical fiber bus by an asynchronous RS422 and a synchronous RS422 according to the fourth embodiment, where the storage circuit includes a register circuit and a data storage circuit;
the register circuit is a static storage circuit and is used for storing data information;
the data storage circuit is a dynamic storage circuit and can be externally connected with an SD card to realize the transfer of data information.
In practical application, the register circuit is a static storage circuit and is used for storing data information, and the data transmission function with high reliability and strong real-time performance is realized;
the data storage circuit is a dynamic storage circuit and can be externally connected with an SD card and a mobile hard disk to realize the transfer of data information.
Reference is made to fig. 3 to describe the present embodiment, which illustrates asynchronous RS422 bus communication in an airborne conversion device for accessing asynchronous RS422 and synchronous RS422 communication to an optical fiber bus according to the first embodiment, where the asynchronous RS422 bus communication includes an asynchronous RS422 isolation transceiver and an asynchronous RS422 serial logic unit;
the asynchronous RS422 serial logic unit is used for realizing the analysis of an asynchronous communication protocol;
the asynchronous RS422 isolation transceiver is used for realizing level conversion of signals, and asynchronous communication data transmission between the asynchronous RS422 isolation transceiver and the FPGA module is realized through the asynchronous RS422 serial logic unit.
In practical application, the asynchronous RS422 bus communication exchanges information with an external inertial navigation terminal, an aviation parameter terminal, an atmospheric engine terminal and a differential GPS terminal, the asynchronous RS422 serial logic unit is realized by adopting SMQ7K325T, and the communication baud rate, the frame format and the like are mainly set.
Eighth embodiment, this embodiment illustrates an asynchronous RS422 isolation transceiver in an onboard switching device for accessing asynchronous RS422 and synchronous RS422 communication to a fiber bus according to the seventh embodiment, where the asynchronous RS422 isolation transceiver is implemented by using an ADM2682E chip.
In practical application, the asynchronous RS422 isolation transceiver is realized by adopting an ADM2682E chip, the ADM2682E chip adopts 5V/3.3V power supply and integrates an isolation type DC-DC converter, a 3-channel isolator and a tri-state differential line driver, the data rate can reach 16Mbps, and the transmission rate is high.
The ninth embodiment is described with reference to fig. 4, and this embodiment exemplifies the synchronous RS422 bus communication in the airborne conversion equipment for accessing the asynchronous RS422 and synchronous RS422 communication to the optical fiber bus in the first embodiment, where the synchronous RS422 bus communication includes a synchronous RS422 isolation transceiver and a synchronous RS422 serial logic unit;
the synchronous RS422 serial logic unit is used for realizing the analysis of a synchronous communication protocol;
the synchronous RS422 isolation transceiver is used for realizing level conversion of signals, and synchronous communication data transmission between the synchronous RS422 isolation transceiver and the FPGA module is realized through the synchronous RS422 serial logic unit.
In practical application, the information interaction between the onboard conversion equipment and the external radio terminal is realized by synchronous RS422 bus communication, and the synchronous RS422 serial logic unit is realized by SMQ7K325T and is mainly used for setting communication baud rate, frame format and the like.
In a tenth embodiment, a synchronous RS422 isolation transceiver in the airborne conversion device with the asynchronous RS422 and the synchronous RS422 communication access fiber bus described in the ninth embodiment is exemplified, the synchronous RS422 isolation transceiver is implemented by using an ADM2682E chip, the ADM2682E chip is powered by 5V/3.3V, and is integrated with an isolated DC-DC converter, a 3-channel isolator and a tri-state differential line driver, so that the data rate can reach 16Mbps, and the transmission rate is high.
The above description is only an example of the present invention, and is not limited to the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention. Are intended to be included within the scope of the appended claims.

Claims (10)

1. An airborne conversion device for communication access of an asynchronous RS422 and a synchronous RS422 to a fiber bus is characterized by comprising a core processor, a global bus module and a local bus module;
the core processor is respectively connected with the global bus module and the local bus module;
the core processor comprises a DSP module, an FPGA module and an EMIF bus;
the EMIF bus is used for connecting the DSP module and the FPGA module to realize data transmission between the DSP module and the FPGA module;
the global bus module comprises an EMIF interface, and is connected with the EMIF bus through the EMIF interface and used for realizing optical fiber communication data transmission;
the local bus module comprises asynchronous RS422 bus communication and synchronous RS422 bus communication;
the asynchronous RS422 bus communication is connected with the FPGA module and is used for realizing asynchronous communication data transmission;
and the synchronous RS422 bus communication is connected with the FPGA module and is used for realizing synchronous communication data transmission.
2. The airborne switching equipment of the asynchronous RS422 and synchronous RS422 communication access optical fiber bus of claim 1, wherein the DSP module comprises a DSP core and an EMIF bus interface;
and the DSP core is connected with the EMIF bus interface and is used for converting asynchronous RS422 communication data and synchronous RS422 communication data into optical fiber communication data.
3. The airborne conversion equipment of the asynchronous RS422 and synchronous RS422 communication access optical fiber bus of claim 1, wherein said global bus module further comprises an optical fiber protocol control module and an optical module;
the optical module is used for receiving and transmitting link signals and realizing the conversion of photoelectric signals;
the optical fiber protocol control module is connected with the optical module and used for realizing analysis of a transmission protocol and realizing data transmission between the optical fiber protocol control module and the DSP module through an EMIF interface.
4. The airborne conversion equipment of the asynchronous RS422 and synchronous RS422 communication access optical fiber bus of claim 3, wherein the optical fiber protocol control module further comprises a serial data transceiver circuit, a protocol parsing module, a storage circuit and an interface switching circuit;
the serial data transceiver circuit is connected with the optical module and used for receiving a link signal of the optical module;
the serial data transceiver circuit sends the received link signal to a protocol analysis module, the protocol analysis module sends the link signal to the storage circuit for storing the link signal, and the link signal is converted into an EMIF link signal through the interface switching circuit and sent to the DSP module through an EMIF interface.
5. The airborne conversion equipment of the asynchronous RS422 and synchronous RS422 communication access fiber-optic bus of claim 4, wherein said protocol resolution module comprises a data transmission module and an instruction transmission module;
the data transmission module is used for receiving and transmitting data information;
the instruction transmission module is used for receiving and transmitting instruction information.
6. The device of claim 4, wherein the storage circuit comprises a register circuit and a data storage circuit;
the register circuit is a static storage circuit and is used for storing data information;
the data storage circuit is a dynamic storage circuit and can be externally connected with an SD card to realize the transfer of data information.
7. The on-board conversion device for accessing both asynchronous RS422 and synchronous RS422 communications to a fiber optic bus of claim 1, wherein the asynchronous RS422 bus communications comprise an asynchronous RS422 isolation transceiver and an asynchronous RS422 serial logic unit;
the asynchronous RS422 serial logic unit is used for realizing the analysis of an asynchronous communication protocol;
the asynchronous RS422 isolation transceiver is used for realizing level conversion of signals, and asynchronous communication data transmission between the asynchronous RS422 isolation transceiver and the FPGA module is realized through the asynchronous RS422 serial logic unit.
8. The device of claim 7, wherein the asynchronous RS422 and synchronous RS422 communication access fiber-optic bus is implemented by using ADM2682E chip.
9. The on-board conversion device for accessing both asynchronous RS422 and synchronous RS422 communication to a fiber optic bus of claim 1, wherein the synchronous RS422 bus communication comprises a synchronous RS422 isolation transceiver and a synchronous RS422 serial logic unit;
the synchronous RS422 serial logic unit is used for realizing the analysis of a synchronous communication protocol;
the synchronous RS422 isolation transceiver is used for realizing level conversion of signals, and synchronous communication data transmission between the synchronous RS422 isolation transceiver and the FPGA module is realized through the synchronous RS422 serial logic unit.
10. The device for switching between asynchronous RS422 and synchronous RS422 communication access fiber optic bus on-board according to claim 9, wherein said synchronous RS422 isolation transceiver is implemented using ADM2682E chip.
CN202211036486.5A 2022-08-29 2022-08-29 Airborne conversion equipment for communication access of asynchronous RS422 and synchronous RS422 to optical fiber bus Pending CN115499059A (en)

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CN202211036486.5A CN115499059A (en) 2022-08-29 2022-08-29 Airborne conversion equipment for communication access of asynchronous RS422 and synchronous RS422 to optical fiber bus

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