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Semi-duplex communication transmitting-receiving control device and method thereof

A transceiver control, half-duplex technology, applied in the field of half-duplex communication transceiver control devices, can solve the problems of multi-single-chip I/O port resources, reduce communication chips, and low bus failure, so as to reduce workload and difficulty, solve problems Communication failure, the effect of solving the delay

Active Publication Date: 2012-08-22
HENAN HANWEI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen that using two sets of I / O port control will reduce the probability of bus failure from 50% to 25%, which greatly reduces the probability that the communication chip is in the sending state when the MCU crashes; and so on, if three I / O ports are used If it is controlled by three or more I / O ports, the probability of bus failure will be lower; although this method reduces the probability that the communication chip is in the sending state when the single-chip computer crashes, it does not fundamentally solve this problem. , and take up too many MCU I / O port resources

Method used

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  • Semi-duplex communication transmitting-receiving control device and method thereof
  • Semi-duplex communication transmitting-receiving control device and method thereof
  • Semi-duplex communication transmitting-receiving control device and method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0030] like figure 1 As shown, a half-duplex communication transceiver control device includes a central processor circuit, a transceiver control circuit for signal conversion and a half-duplex communication module, wherein the serial communication interface of the central processor circuit is connected to the The serial communication interface of the half-duplex communication module is connected, and the signal control I / O output interface of the central processing unit circuit is connected to the signal input terminal CTRL_IN of the transceiver control circuit so as to send jump signals or level signals in time-sharing The control signal output terminal CTRL_OUT of the transceiver control circuit is connected to the transceiver control port of the half-duplex communication module so as to convert the received jump signal into a transmission control signal or convert the received level signal into a reception control signal And control the half-duplex communication module to ...

Embodiment 2

[0037] The difference between this embodiment and Embodiment 1 mainly lies in that: the half-duplex communication module adopts the RS485 half-duplex communication module; The communication chip whose model is SP485 or the communication chip whose model is SP487 or the communication chip whose model is SN75176 or the communication chip whose model is SN65HVD3082.

Embodiment 3

[0039] The difference between this embodiment and Embodiments 1 and 2 mainly lies in that: the transceiver control circuit is a reset chip with a watchdog timer function inside; Reset chip or TPS3824 reset chip or X25043 reset chip or X25045 reset chip or MX705 reset chip or MX708 reset chip.

[0040] like figure 2 As shown, the signal control I / O output interface of the central processing unit circuit is connected to the WDI port of the reset chip U2 whose model is TPS3820, that is, connected to the signal input terminal CTRL_IN of the reset chip U2, and the reset chip U2 The port, that is, the control signal output terminal CTRL_OUT is connected to the transceiver control port of the half-duplex communication module.

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Abstract

The invention provides a semi-duplex communication transmitting-receiving control device and a method thereof. The device comprises a central processor circuit, a transmitting-receiving control circuit and a semi-duplex communication module, wherein the central processor circuit is connected with the serial communication interface of the semi-duplex communication module. The method is characterized by comprising the following steps that: the signal control I / O (Input / Output) interface of the central processor circuit is connected with the signal input end of the receiving-transmitting control circuit to transmit a jump signal or a level signal separately; and the control signal output end of the receiving-transmitting control circuit is connected with the receiving-transmitting control port of the semi-duplex communication module to convert the received jump signal into a transmission control signal or convert the received level signal into a receiving control signal and realize receiving-transmitting communication by controlling the semi-duplex communication module. The device has the advantages of scientific design, low application cost and high reliability; and the method has the advantages of easiness for realizing and no machine halt communication failure.

Description

technical field [0001] The present invention relates to a communication device and its method, in particular to a half-duplex communication sending and receiving control device and its method. Background technique [0002] Since the publication of the EIA-485 protocol, it has been widely used in instruments and meters in various industries around the world due to its protocol, networking flexibility and convenience; RS485 is a field bus for half-duplex communication. In the entire bus system, only one device can send data to the bus at the same time, and the other devices must be in the receiving state; if two or more devices send data to the bus at the same time, it will cause bus conflicts and cause network paralysis ; Therefore, in the entire field bus system, there is generally a host to manage the bus, and all extensions are in the receiving state by default. host; if a certain extension fails but it is in the receiving state, it will not affect the communication of ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/16
Inventor 李志刚金鑫杜瑞杰张艳鹏
Owner HENAN HANWEI ELECTRONICS
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