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Design method of field bus optical fiber communication interface

A technology of optical fiber communication and design method, which is applied in the direction of bus network, data exchange through path configuration, digital transmission system, etc. It can solve the problems of limiting the flexibility of the system, the ease of use of the communication interface, and the difficulty in meeting the dynamic load requirements of the system. To achieve the effect of improving system integration, improving ease of use, and reducing use

Inactive Publication Date: 2015-05-20
SHENYANG GOLDING NC & INTELLIGENCE TECH CO LTD
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Problems solved by technology

This is not the most economical way to achieve
At the same time, this method is difficult to meet the dynamic load requirements of the system when the processing speed of the data operation part does not match the rate of the data transmission part, which limits the flexibility of the system and the ease of use of the communication interface.

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  • Design method of field bus optical fiber communication interface
  • Design method of field bus optical fiber communication interface
  • Design method of field bus optical fiber communication interface

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] Asynchronous FIFO: FIFO is a first-in first-out data storage structure that can buffer data. The biggest difference between asynchronous FIFO and ordinary FIFO is that the read and write clocks of asynchronous FIFO are different, that is, independent clocks are used for reading or writing. Asynchronous FIFO is mostly used in multi-clock inter-module communication to realize data transmission between different clock domains. After the asynchronous FIFO is used in the interface of optical communication, the data to be sent or received can be buffered, and the clock of the link layer is independent from the clock of the optical interface. The data processing speed of the link layer and the data of the physical layer The transmission rate can be easily adjusted independently according to the needs. The flexibility and ease of operation of...

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Abstract

The invention discloses a design method of a field bus optical fiber communication interface. The method includes: operations interfaces provided to a data link layer are two asynchronous FIFOs, and the two asynchronous FIFOs are a transmitting FIFO and a receiving FIFO; the number of 0 and 1 in the data of the transmitting FIFO is balanced after the data is subjected to 8b / 10b encoding, and the high-speed serial data stream, after parallel-serial conversion, of the encoded 10bit parallel data is transmitted through an optical transceiver to complete a data transmitting function; the serial data oversampling module of a receiving part samples the received serial data and performs data recovery, the recovered data is transmitted to a word alignment and data monitoring module to obtain aligned 10bit data, a 8b / 10b decoding module is used to recover the 10bit data into 8bit data, and the data is written to the asynchronous receiving FIFO through a receiving control module to complete a data receiving function.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a design method of an optical fiber communication interface for a numerical control bus. Background technique [0002] With the development of numerical control technology towards intelligence, openness and networking, fieldbus communication technology has been widely used in numerical control systems and has become a key technology to improve the overall performance of the system. In the field bus communication medium, compared with the traditional electrical signal transmission, optical fiber communication has the advantages of high transmission rate, large channel capacity, long transmission distance, low loss, and strong anti-interference ability. In the complex CNC machining environment, higher reliability and safety can be obtained. In recent years, the application of optical communication technology in the field of high-speed field bus communication has gradually be...

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Application Information

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IPC IPC(8): H04L12/40H04L7/033
Inventor 林浒刘生陶耀东李锁郑一麟
Owner SHENYANG GOLDING NC & INTELLIGENCE TECH CO LTD
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