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Isolation module based on RS485 communication and communication method thereof

A technology of RS485 and communication method, applied in the field of RS484 communication isolation module and its communication, can solve the problems of high cost, high system complexity, and difficult development, and achieve the goal of reducing cost, simplifying network isolation components, and improving data exchange security. Effect

Pending Publication Date: 2021-03-19
成都鼎安华智慧物联网股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lead to higher cost, greater development difficulty, and higher system complexity

Method used

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  • Isolation module based on RS485 communication and communication method thereof
  • Isolation module based on RS485 communication and communication method thereof
  • Isolation module based on RS485 communication and communication method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, this embodiment 1 provides a network isolation module based on RS485 communication, including a STM32F103RCT6 single-chip microcomputer, two RS485 conversion control chips are connected to the STM32F103RCT6 single-chip microcomputer, and the two RS485 conversion control chips are respectively connected to a peripheral interface. The two RS485 conversion control chips are U2 and U3 respectively, and No. 1 and No. 4 pins of the RS485 conversion control chip are connected to UART1 and UART2 interfaces of the single-chip microcomputer at the serial port TTL level respectively; No. 2 and No. 3 pins of the conversion chip The pin is a transceiver control pin, which is connected to the general GPIO pin of the single-chip microcomputer; No. 6 and No. 7 pins of the conversion chip are connected with the peripheral interface.

[0035] No. 1 pin of described RS485 conversion control chip U2 is connected with the interface of single-chip microcomputer UAR...

Embodiment 2

[0039] Such as Figure 4 As shown, Embodiment 2 provides a communication method for a network isolation module based on RS485 communication, including the following steps:

[0040] Step 1, the RS485 conversion control chip receives data, and sends the data to the UART receiving buffer of the single-chip processing unit;

[0041] Step 2, the CPU reads and processes the buffered data;

[0042] Step 3, the CPU sends the data to the UART send buffer of the microcontroller;

[0043] Step 4: The UART sending buffer receives the data, and sends the data to another RS485 conversion control chip.

[0044] This application adopts the communication method of the network isolation module of RS485 chip plus single-chip microcomputer, which is not simply disconnecting the network connection, and can increase the single-chip microcomputer to control and process the data in the case of non-network connection exchange data, and the CPU of the single-chip microcomputer has processed the data....

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Abstract

The invention relates to the field of network communication, in particular to an RS484 communication isolation module and a communication method thereof. The RS485 conversion control circuit comprisestwo RS485 conversion control chips, a single-chip microcomputer and two peripheral interfaces, the RS485 conversion control chips are in a serial bus communication mode, a network isolation mode of the RS485 conversion control chips and the single-chip microcomputer is adopted, single-chip microcomputer control processing is added under the condition that network connection exchange data is obtained, and the data safety coefficient is higher.

Description

technical field [0001] The invention relates to the field of network communication, in particular to an RS484 communication isolation module and a communication method thereof. Background technique [0002] With the development of the Internet, people pay more and more attention to the security of the network communication system. In environments with high requirements for network security, network isolation devices are generally required to transfer data from one segment to another by disconnecting the network connection. In this way, data exchange under the condition of network isolation is realized to protect network security. The method of exchanging data through non-network means is the core part of network isolation. Generally, optical fiber, memory, etc. are used as the isolation exchange medium. [0003] Traditional general physical isolation uses high-speed data exchange methods such as optical fiber and memory to meet high data throughput. This leads to higher ...

Claims

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Application Information

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IPC IPC(8): G06F13/38G06F13/42
CPCG06F13/382G06F13/4286G06F2213/0002
Inventor 杨超
Owner 成都鼎安华智慧物联网股份有限公司
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