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Serial port-based bidirectional cascade communication circuit system and addressing method

A communication circuit and cascading technology, used in transmission systems, electrical components, electrical digital data processing, etc., can solve the problems of too long communication distance, adding repeaters, and too many cascading devices.

Pending Publication Date: 2022-05-27
浙江台州昀瑞电子科技有限公司
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Problems solved by technology

[0005] In order to solve the above-mentioned shortcomings, the present invention provides a serial port-based two-way cascade communication circuit system and addressing method, aiming to solve the problem that if the communication distance is too long and there are too many cascaded devices in the existing equipment, it will affect the normal operation of the equipment or Need to add a repeater problem

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  • Serial port-based bidirectional cascade communication circuit system and addressing method
  • Serial port-based bidirectional cascade communication circuit system and addressing method

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Embodiment Construction

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0040] The bidirectional cascade communication circuit system based on the serial port of the present invention can perform local address encoding for each slave when the master communicates with multiple slaves through communication lines.

[0041] like figure 1 As shown, a serial port-based two-way cascade communication circuit system includes an input terminal IN and an output single OUT. The master is connected to the first slave "IN" input interface through a connecting line, and each slave "OUT" output interface Connect cascaded with the "IN" input port of the next slave in turn.

[0042] like figure 2 As shown, the signal input terminal "TXD-IN" is sent from the upper-level slave or master, and the signal output terminal "TXD-OUT" is sent to the next-level slave. The signal input terminal "RXD-IN" is sent by the next-level slave, and the signal out...

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Abstract

The invention discloses a serial port-based bidirectional cascade communication circuit system, which comprises a host, a connecting line and slaves, and is characterized in that the host is connected with the IN input interface of the first slave through the connecting line, the OUT output interface of each slave is connected with the IN input interface of the next slave, and a plurality of slave devices are cascaded in sequence; the slave comprises a pull-up circuit, a level conversion circuit, a receiving circuit, a transmitting circuit, a reference voltage circuit and a switch control circuit. Compared with the prior art, the system has the advantages that automatic addressing of each slave can be realized, the networking efficiency is improved, bidirectional cascade communication is realized, and the stability and the communication distance are increased.

Description

technical field [0001] The invention relates to a cascade communication circuit and an addressing method, in particular to a serial port-based bidirectional cascade communication circuit system and an addressing method. Background technique [0002] The cascading communication technology can realize a master to control multiple slaves and obtain slave information, realize two-way mutual communication, assign addresses, and automatically form a network. [0003] The existing serial communication distance is relatively short, and the anti-interference ability is poor. After being processed by the RS232 chip, only point-to-point communication can be realized, and one-to-many communication requirements cannot be realized. After being processed by RS485, one-to-many communication can be realized, but due to the limitation of the mechanism and driving capability of RS485, there are great limitations in the communication distance and the number of connected slaves. For more than ...

Claims

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Application Information

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IPC IPC(8): H04L61/50H04L61/5038G06F13/42
CPCG06F13/4282Y02D10/00
Inventor 杨文鑫刘旭东董飞青周希乔
Owner 浙江台州昀瑞电子科技有限公司
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