1394 board card based on optical communication

Abstract

The utility model discloses a 1394 board card based on optical communication, which solves the problems that in the traditional IEEE 1394 communication, data is transmitted in a cable through an electric signal, and the transmission distance and the transmission rate are limited due to the fact that the transmission of the electric signal is limited by electrical characteristics such as resistance, capacitance and the like, and comprises an FPGA (Field Programmable Gate Array) chip, a PCIe (Peripheral Component Interconnect Express) interface, an LLC (Logic Link Control) layer, a PHY (Physical Layer) layer and a photoelectric conversion module, the FPGA chip is connected with the PCIe interface, the PCIe interface is connected with the host computer, the high-speed data transmission capability of the PCIe interface is fully utilized, and rapid and stable exchange of data streams is ensured; and the FPGA chip is connected with the LLC layer and the PHY layer. The communication card provided by the utility model can give full play to the high-speed data processing advantage of the FPGA chip, and allows a system to realize farther transmission distance and higher anti-interference performance through optical signals.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communication, in particular to a 1394 board card based on optical communication. Background Art

[0002] In traditional IEEE 1394 communications, data is transmitted via electrical signals over cables. Because electrical signal transmission is limited by electrical properties such as resistance and capacitance, transmission distance and data rate are limited. The early 1394a standard had a maximum transmission rate of 400 Mbps. Although the subsequent 1394b standard increased this to 800 Mbps, in practice, achieving the theoretical maximum rate is often difficult due to factors such as cable length, quality, and environmental interference.

[0003] To overcome these limitations, fiber optic communication technology was introduced into the 1394 communication protocol. Fiber optic communication uses optical signals rather than electrical signals to transmit data, which has the following advantages:

[0004] Higher bandwidth: The light waves used in fiber-optic communications can provide higher frequencies, thus supporting higher data transmission rates;

[0005] Lower attenuation: Optical fiber has much lower signal attenuation than electrical cables, allowing data to be transmitted over longer distances without the need for repeaters or amplification;

[0006] Anti-electromagnetic interference: Optical fiber is not affected by electromagnetic interference and can work stably in high-noise environments;

[0007] Lighter and thinner: Optical fiber is lighter and thinner than cables of the same capacity, making it easier to route and install;

[0008] By combining the 1394 protocol with fiber optic communications, higher transmission rates and greater distances can be achieved, significantly surpassing the limitations of traditional cables. This technological advancement is of great significance for applications requiring high-speed data transmission, such as high-definition video transmission, large-scale data centers, and industrial automation.

[0009] In summary, fiber optic communication provides a solution for 1394 communication boards that breaks through traditional electrical limitations, giving the 1394 interface greater potential and application space in high-speed data transmission and long-distance communication. Utility Model Content

[0010] The utility model provides a 1394 board based on optical communication to solve the technical problem that in traditional IEEE 1394 communication, data is transmitted in cables via electrical signals. Since the transmission of electrical signals is limited by electrical characteristics such as resistance and capacitance, the transmission distance and rate are limited.

[0011] To achieve the above objectives, the present invention provides the following technical solutions:

[0012] The present application provides a 1394 board based on optical communication, characterized by comprising: an FPGA chip, a PCIe interface, an LLC layer, a PHY layer, and a photoelectric conversion module, wherein the FPGA chip is connected to the PCIe interface, and the PCIe interface is connected to a host computer, fully utilizing the high-speed data transmission capability of the PCIe interface to ensure fast and stable exchange of data streams;

[0013] The FPGA chip is connected to the LLC layer and the PHY layer. The LLC layer is responsible for establishing, maintaining and terminating links, as well as processing the transmission of data packets. The PHY layer is responsible for sending and receiving physical electrical signals. The PHY layer is connected to the optoelectronic conversion module, converting electrical signals into optical signals through the optoelectronic conversion module and transmitting them through optical fibers.

[0014] Furthermore, the PCIe interface is a PCIe X4 interface, which has four data transmission channels, each of which supports high-speed data transmission, thereby providing sufficient bandwidth for board communication.

[0015] Furthermore, it also includes a clock circuit, a reset circuit, a memory and a JTAG circuit; the clock circuit, the reset circuit, the memory and the JTAG circuit are respectively connected to the FPGA chip;

[0016] The clock circuit is used to provide a synchronous timing signal to coordinate data transmission;

[0017] The reset circuit is used to ensure that the board is reset quickly and safely when the system is powered on or encounters an abnormal situation;

[0018] The memory is used to store the configuration data of the FPGA chip, ensuring the normal startup and operation of the FPGA; and serves as a data cache to optimize the data transmission process;

[0019] The JTAG circuit is used to provide a standard programming, debugging and testing interface.

[0020] Furthermore, the JTAG circuit is connected to the debugging interface, which facilitates maintenance and update operations on the FPGA chip and enhances the adaptability and maintainability of the system.

[0021] Furthermore, the board is connected to a power supply to provide power to the board.

[0022] Beneficial effects achieved by this utility model:

[0023] (1) The 1394 board based on optical communication provided by the present invention uses an FPGA chip in the optical port 1394 communication card, which can realize efficient coordination of the complex data interaction process between the link layer and the physical layer in the IEEE 1394 standard. The FPGA chip in the device is responsible for performing data serialization and deserialization, error checking and correction, and data packet routing and buffer management. In addition, it also handles flow control and signal synchronization during the transmission process in real time to ensure that data is accurately transmitted according to the timing specified by the 1394 protocol. At the same time, the optoelectronic conversion module converts the electrical signal processed by the FPGA chip into an optical signal and uses optical fiber for data transmission. Such a design not only enables the communication card to give full play to the high-speed data processing advantages of the FPGA chip, but also allows the system to achieve a longer transmission distance and higher anti-interference performance through optical signals.

[0024] (2) The 1394 board based on optical communication provided by the present invention adopts PCIe X4 configuration, which means that the communication card has four data transmission channels, each of which can support high-speed data transmission, thereby providing sufficient bandwidth for 1394 communication; it also integrates a precise clock circuit, which provides synchronous timing signals to coordinate data transmission; the reset circuit ensures that the communication card can be quickly and safely reset when the system is powered on or encounters an abnormal situation, thereby ensuring the robustness and reliability of the system; the board is equipped with an appropriate amount of memory resources, which not only stores the configuration data of the FPGA chip, ensuring the normal startup and operation of the FPGA chip, but also can serve as data cache to optimize the data transmission process; the JTAG circuit provides a standard programming, debugging and testing interface, allowing developers to easily maintain and update the FPGA chip, thereby enhancing the adaptability and maintainability of the system; the LLC layer is responsible for establishing, maintaining and terminating links, and processing the transmission of data packets; the PHY layer is responsible for sending and receiving physical electrical signals, and the PHY layer is connected to the optoelectronic conversion module, converting the electrical signal into an optical signal through the optoelectronic conversion module and transmitting it through optical fiber.

[0025] (3) The 1394 board based on optical communication provided by the present invention uses traditional metal wire transmission media, which is limited by its sensitivity to electromagnetic interference and limited transmission rate and distance. In the optical port 1394 communication card, the upgrade of the underlying physical transmission to optical signals greatly enhances the overall communication stability. The use of optical fiber significantly reduces signal distortion caused by environmental electromagnetic noise, which is crucial for ensuring the stability of long-distance transmission. In addition, the high bandwidth capability of optical fiber expands the data transmission rate, allowing larger amounts of data to be transmitted in the same amount of time. This improvement not only improves data transmission efficiency, but also provides support for applications that require high bandwidth, such as high-definition video transmission, large-scale data center connections, and complex sensor networks. Therefore, the use of optical fiber technology not only increases communication speed, but also greatly improves the system's fault tolerance and reliability, meeting today's growing demand for high-speed communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a circuit structure principle block diagram of an embodiment of the utility model;

[0027] The accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. To better illustrate this embodiment, some components of the accompanying drawings may be omitted, enlarged, or reduced in size and do not represent the actual dimensions of the product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted from the accompanying drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limitations on this patent. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0030] like Figure 1As shown, a 1394 board based on optical communication is an advanced data transmission interface card, comprising: an FPGA chip, a PCIe interface, an LLC layer, a PHY layer, and a photoelectric conversion module. The FPGA chip is connected to the PCIe interface, which is connected to a host computer, making full use of the high-speed data transmission capability of the PCIe interface to ensure fast and stable exchange of data streams.

[0031] The FPGA chip is connected to the LLC layer and the PHY layer. The LLC layer is responsible for establishing, maintaining and terminating links, as well as processing the transmission of data packets. The PHY layer is responsible for sending and receiving physical electrical signals. The PHY layer is connected to the optoelectronic conversion module, converting electrical signals into optical signals through the optoelectronic conversion module and transmitting them through optical fibers.

[0032] The 1394 board significantly improves performance in demanding data communication environments by combining fiber-optic transmission technology with the IEEE 1394 serial bus standard. The board's core component is a powerful FPGA chip. With its flexibility and high-speed processing capabilities, this chip perfectly handles parsing and executing the 1394 communication protocol while efficiently managing data exchanges with the host system.

[0033] The FPGA chip is responsible for data serialization and deserialization, error checking and correction, and packet routing and buffer management. It also handles real-time flow control and signal synchronization during transmission, ensuring accurate data transmission according to the timing specified by the 1394 protocol. Simultaneously, the optical-to-electrical conversion module converts the electrical signals processed by the FPGA chip into optical signals for data transmission via optical fiber. This design not only enables the communication card to fully utilize the FPGA chip's high-speed data processing capabilities, but also allows the system to achieve longer transmission distances and higher interference resistance through optical signals.

[0034] The card connects to the host computer using a PCIe X4 interface, fully leveraging the high-speed data transfer capabilities of the PCIe interface to ensure fast and stable data exchange. The PCIe X4 configuration means the card has four data transfer channels, each capable of supporting high-speed data transfer, providing ample bandwidth for 1394 communications.

[0035] To ensure stable operation of the communication card, a precise clock circuit is integrated, providing synchronous timing signals to coordinate data transmission. A reset circuit ensures that the communication card can be quickly and safely reset when the system is powered on or encounters an abnormal situation, ensuring system robustness and reliability.

[0036] In addition, the board is equipped with a suitable amount of memory resources. This memory not only stores the FPGA chip's configuration data, ensuring normal startup and operation, but also serves as a data cache to optimize data transmission. The JTAG circuit provides a standard programming, debugging, and testing interface, allowing developers to easily maintain and update the FPGA chip, enhancing the system's adaptability and maintainability.

[0037] In implementing the 1394 communication protocol, the FPGA closely coordinates the LLC (Logical Link Control) and PHY (Physical Layer Transceiver) layers. The LLC layer is responsible for establishing, maintaining, and terminating links, as well as handling data packet transmission; the PHY layer, on the other hand, is responsible for sending and receiving physical electrical signals. Ultimately, these electrical signals are converted into optical signals by an optoelectronic conversion module and transmitted over optical fiber, significantly extending communication distance and improving resistance to electromagnetic interference.

[0038] In summary, the design of the optical 1394 communication card makes it a high-performance, long-distance, and highly reliable data transmission solution. It is particularly suitable for applications that require high-speed data transmission, long-distance connections, or environments with high electromagnetic interference, such as industrial automation, avionics, data centers, and multimedia applications.

[0039] The serial numbers of the embodiments of this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are only preferred embodiments of this application and do not limit the scope of the patent of this application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of this application.

Claims

1. A 1394 board based on optical communication, the board is connected to a host computer, characterized in that: include: FPGA chip, PCIe interface, LLC layer, PHY layer and photoelectric conversion module, wherein the FPGA chip is connected to the PCIe interface, and the PCIe interface is connected to the host computer, making full use of the high-speed data transmission capability of the PCIe interface to ensure fast and stable exchange of data streams; The FPGA chip is connected to the LLC layer and the PHY layer. The LLC layer is responsible for establishing, maintaining and terminating links, and processing the transmission of data packets. The PHY layer is responsible for sending and receiving physical electrical signals. The PHY layer is connected to the optoelectronic conversion module, converting electrical signals into optical signals through the optoelectronic conversion module and transmitting them through optical fibers.

2. A 1394 board based on optical communication according to claim 1, characterized in that: The PCIe interface is a PCIe X4 interface, which has four data transmission channels, each of which supports high-speed data transmission, thereby providing sufficient bandwidth for board communication.

3. A 1394 board based on optical communication according to claim 1, characterized in that: It also includes a clock circuit, a reset circuit, a memory and a JTAG circuit; the clock circuit, the reset circuit, the memory and the JTAG circuit are respectively connected to the FPGA chip; The clock circuit is used to provide a synchronous timing signal to coordinate data transmission; The reset circuit is used to ensure that the board is reset quickly and safely when the system is powered on or encounters an abnormal situation; The memory is used to store the configuration data of the FPGA chip, ensuring the normal startup and operation of the FPGA; and as a data cache, optimizing the data transmission process; The JTAG circuit is used to provide a standard programming, debugging and testing interface.

4. A 1394 board based on optical communication according to claim 3, characterized in that: The JTAG circuit is connected to the debugging interface, which facilitates maintenance and update operations on the FPGA chip and enhances the adaptability and maintainability of the system.

5. A 1394 board based on optical communication according to claim 1, characterized in that: The board is connected to a power source to provide power to the board.

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