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

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...

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

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