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

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

Active Publication Date: 2021-04-06
GREE ELECTRIC APPLIANCES INC
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  • Claims
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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

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

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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...

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Abstract

The invention discloses a baud rate switching method based on multi-node UART communication, an air conditioning system and a processor. The switching method includes a master and a plurality of slaves, the master switches the baud rate every T1 time, rolls the baud rates of all slaves, and judges according to the baud rates of all slave replies, and selects a common baud rate for communication. Set the baud rate priority in the communication protocol of the master-slave machine. If the common baud rate of all slave machines is unique, use the common baud rate for communication; if the common baud rate of all slave machines is not unique , the master will arbitrate the baud rates of all slaves, and choose the highest priority among the common baud rates for communication. The invention effectively solves the communication problem caused by asynchronous switching of baud rates in multi-node UART communication.

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...

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Application Information

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Patent Type & Authority Patents(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
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