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Full-duplex and half-duplex converter and conversion method

A half-duplex and full-duplex technology, which is applied in the direction of duplex signal operation, can solve the problems of data loss and bit error rate, and achieve the effect of ensuring accuracy and solving communication compatibility problems

Inactive Publication Date: 2014-07-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of data loss or high bit error rate when the data processing card using RS422 serial communication communicates directly with the signal acquisition card using RS485 serial communication, and provides a full-duplex and half-duplex Converters and Conversion Methods

Method used

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  • Full-duplex and half-duplex converter and conversion method
  • Full-duplex and half-duplex converter and conversion method
  • Full-duplex and half-duplex converter and conversion method

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specific Embodiment approach 1

[0043] Specific implementation mode one: combine figure 1 Describe this embodiment, the full-duplex and half-duplex converter described in this embodiment includes a half-duplex signal acquisition module 1, a full-duplex data processing module 2 and a tri-state gate integrated circuit 3, the full-duplex Data processing module 2 comprises physical layer receiving end 2-1, physical layer sending end 2-2 and FPGA chip 2-3;

[0044] Described half-duplex signal acquisition module 1 adopts RS485 chip to realize, and described physical layer receiving end 2-1 and physical layer sending end 2-2 all adopt 422 serial port driver modules to realize;

[0045] The 422R+ port and the 422R- port of the physical layer receiving end 2-1 are respectively connected to the data signal output + port and the data signal output - port of the tri-state gate integrated circuit 3, and the 422T+ port and the 422T- port of the physical layer sending end 2-2 are respectively Connect the command signal i...

specific Embodiment approach 2

[0064] Specific implementation mode two: combination figure 1 with figure 2 This embodiment is described. This embodiment is a further limitation of the full-duplex and half-duplex converter described in Embodiment 1. In this embodiment, the tri-state gate integrated circuit 3 includes a first tri-state gate 3 -1, the second tri-state gate 3-2, the third tri-state gate 3-3, the fourth tri-state gate 3-4 and the NOT gate 3-5;

[0065] The input end of the NOT gate 3-5, the enable signal end of the first tri-state gate 3-1 and the enable signal end of the second tri-state gate 3-2 are connected together as the tri-state gate integrated circuit 3 The enable signal input end, the output end of the NOT gate 3-5 is simultaneously connected to the enable signal end of the third tri-state gate 3-3 and the enable signal end of the fourth tri-state gate 3-4;

[0066] The input end of the first tri-state gate 3-1 is connected to the 422T+ port of the physical layer sending end 2-2, th...

specific Embodiment approach 3

[0070] Specific implementation mode three: combination figure 1 with image 3 Describe this embodiment, the full-duplex and half-duplex conversion method described in this embodiment is realized based on the following conversion device: the conversion device includes a half-duplex signal acquisition module 1, a full-duplex data processing module 2 and three State gate integrated circuit 3, described full-duplex data processing module 2 comprises physical layer receiving end 2-1, physical layer sending end 2-2 and FPGA chip 2-3;

[0071] Described half-duplex signal acquisition module 1 adopts RS485 chip to realize, and described physical layer receiving end 2-1 and physical layer sending end 2-2 all adopt 422 serial port driver modules to realize;

[0072] The 422R+ port and the 422R- port of the physical layer receiving end 2-1 are respectively connected to the data signal output + port and the data signal output - port of the tri-state gate integrated circuit 3, and the 422...

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Abstract

A full-duplex and half-duplex converter and a conversion method relate to full-duplex and half-duplex communication compatibility technology. The method aims at solving the problems of data loss or high error rate caused by the fact that a data processing card adopting RS422 serial port communication and a signal collection card adopting RS485 serial port communication conduct communication directly. A three-state door integrated circuit is arranged between a half-duplex signal collection module and a full-duplex data processing module, and physical isolation of the transmitting end and the receiving end of a data processing card 422 serial port is achieved. The full-duplex and half-duplex port communication compatibility problem is solved in the way that function modules receive data feedback marks through an inquiry receiving module, and the way is achieved through software. Data loss and error codes do not exist, and data receiving and transmitting accuracy is ensured. The full-duplex and half-duplex converter is applicable to communication between the data processing card adopting the RS422 serial port communication and the signal collection card adopting the RS485 serial port communication.

Description

technical field [0001] The invention relates to a full-duplex and half-duplex communication compatible technology. Background technique [0002] With the development of communication technology, there are more and more communication forms and more and more complex. In the process of signal communication, half-duplex and full-duplex communication methods are generally used. In a complex control system with many communication interfaces, considering the compatibility of communication interfaces, the data processing card generally adopts the full-duplex communication mode based on RS422; based on the requirements of transmission speed, distance and network communication, the current signal acquisition Most of the products adopt the half-duplex communication mode based on RS485. When the data processing card using RS422 serial communication designed based on its own needs communicates directly with the signal acquisition card using RS485 serial communication, there will be two ...

Claims

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Application Information

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IPC IPC(8): H04L5/14H04L5/16
Inventor 陈兴林范文超王伟峰刘杨魏凯王斌
Owner HARBIN INST OF TECH
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