Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Baud rate switching method based on multi-node UART communication, air conditioning system and processor

A baud rate, multi-node technology, applied in the field of communication, can solve the problems of communication failure and different baud rates, and achieve the effect of simple implementation and high reliability

Active Publication Date: 2020-07-17
GREE ELECTRIC APPLIANCES INC
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of communication failure caused by different baud rates in multi-connected units in the prior art, the present invention proposes a baud rate switching method based on multi-node UART communication, which is improved from the aspects of communication timing and communication protocol, for the purpose of normal communication

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Baud rate switching method based on multi-node UART communication, air conditioning system and processor
  • Baud rate switching method based on multi-node UART communication, air conditioning system and processor
  • Baud rate switching method based on multi-node UART communication, air conditioning system and processor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Embodiments of the present invention will be described in detail below, and the embodiments described with reference to the accompanying drawings are schematic and are only used to explain the present invention, not to limit the present invention.

[0030] figure 1 Shows the schematic diagram of the multi-node UART communication circuit. Such as figure 1 As shown, the host side has more than two levels of current amplification, which amplifies the communication signal current of the host and sends it to multiple slave nodes, and communicates according to the specified baud rate. Taking the multi-connected air conditioner unit as an example, it includes a host and N slaves, and the host and slaves communicate through UART. Wherein, the host includes: a main control board, a transmitting end TX, a receiving end RX, a first stage power amplifier 9012, and a second stage power amplifier 9013. The slave machine includes: a driver board, a transmitting end TXS, and a recei...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a baud rate switching method based on multi-node UART communication, an air conditioning system and a processor. According to the switching method, a host and a plurality of slaves are included, the host switches the Baud rate once every T1 time, roll calling is conducted on the Baud rates of all the slaves, judgment is conducted according to the Baud rates replied by all the slaves, and the common Baud rate is selected for communication. A Baud rate priority is set in a communication protocol of the host and slaves, and if the common Baud rate replied by all slaves isunique, the common Baud rate is used to carry out communication; and if the common baud rates replied by all the slaves are not unique, the host arbitrates the baud rates of all the slaves, and selects the highest priority in the common baud rates for communication. According to the invention, the communication problem caused by asynchronous Baud rate switching in multi-node UART communication iseffectively solved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a baud rate switching method based on multi-node UART communication, an air conditioning system and a processor. Background technique [0002] Multi-node Universal Asynchronous Transceiver (UART) technology has the advantages of low cost, high reliability, and can accommodate a large number of communication nodes. Therefore, it has a wide range of applications in the air conditioning industry, especially for multi-connected units with a large number of communication nodes. [0003] With the upgrading of technology, the baud rate of multi-node UART communication is also adjusted accordingly. The more common communication baud rates in the industry are 1200, 2400, 4800, 9600, and 19200. Conventional baud rate replacement will cause communication failures in different versions of the motherboards of each node in the same communication network, and it is impossible to coordinat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00F24F11/88F24F11/58
CPCF24F11/58F24F11/88H04L1/0002H04L1/0015
Inventor 刘文斌王星贺小林
Owner GREE ELECTRIC APPLIANCES INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com