Operation method for connecting main unit of intelligent electric appliance through serial bus

A technology of intelligent electrical appliances and serial bus, applied in the direction of data exchange through path configuration, bus network, error prevention/detection using return channel, etc., can solve the problem of unsolved data communication function, etc., to save manpower, install and use The effect of convenient and convenient connection

Active Publication Date: 2012-09-05
ZHEJIANG PEOPLE ELE APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The prior art does not solve the technical problem of performing data communication functions between the master and smart appliances through the RS-485 interface specification

Method used

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  • Operation method for connecting main unit of intelligent electric appliance through serial bus
  • Operation method for connecting main unit of intelligent electric appliance through serial bus
  • Operation method for connecting main unit of intelligent electric appliance through serial bus

Examples

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Embodiment 1

[0030] See figure 1 , the smart electrical appliance serial bus communication system of the present embodiment comprises: host computer 1 (being computer,) and 3 (can be any value in 1-30 in other embodiments) smart appliance 3; Host computer 1 and smart appliance 3 They are connected through RS-485 bus 2. The distance between the host 1 and the smart electrical appliance 3 is less than 1200 meters. The host 1 and the smart electrical appliance 3 include: a central processing unit and an RS-485 interface connected to the central processing unit. The host computer 1 and the smart electrical appliance 3 can be computers, or smart devices with single-chip microcomputers or embedded processors, such as multi-function printers and copiers, communication equipment, etc.

[0031] See image 3 , in order to extend the communication distance, a repeater 4 is provided between the host 1 and the smart electrical appliance 3 . In order to increase the number of smart appliances 3 conn...

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PUM

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Abstract

The invention relates to a working method of a host computer of an intellectual electrical appliance serial bus through serial bus connection. The system comprises that: the host computer is connected with at least an intellectual electrical appliance through an RS-485 bus; the host computer includes a main module, a patrolling module, a packet handling module, a packet transmitting module, a packet receiving module, a byte transmitting module and a byte receiving module, wherein the main module is used for initializing communication ports of the host computer, initializing the bus, patrolling each end point, plotting network topological graph and displaying parameters; the patrolling module is used for patrolling each end point; the packet handling module is used for completing data exchange between the host computer and each end point; the packet transmitting module is used for transmitting data with 131 bytes; the packet receiving module is used for receiving 131 bytes, performing CRC check after receiving, transmitting unaffirmed handshake signals when being not correct, requiring the end point to retransmit data, receiving again by the host computer.

Description

technical field [0001] The invention relates to a working method for connecting a host computer of an intelligent electrical appliance through a serial bus. Background technique [0002] In the prior art, there are many ways to connect the smart appliance to the host. For example, a USB interface is used. The disadvantage of this method is that the data transmission distance of the USB interface is 1-2 meters, which cannot meet the needs of practical applications. At the same time, the number of USB devices that can be plugged into the USB interface is often only a few, which affects the use of users. [0003] Chinese patent literature publication number CN2566355 discloses a serial management bus interface module used in a serial bus cluster network management system, which includes a standard 485 chip, and two protection resistor. Using its serial management bus interface module, no matter what the type of load at the end of the network is, and the number of loads chan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/40H04L1/16
Inventor 陈彦明陈双龙
Owner ZHEJIANG PEOPLE ELE APPLIANCE
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