Serial port communication system, method and device and electronic equipment

Abstract

The invention discloses a serial port communication system, method and device and electronic equipment, and relates to the technical field of communication. The serial port communication system comprises a plurality of slave stations which are respectively in communication connection with a serial port bus, and an embedded device, wherein one side of the embedded device is connected with the serial port bus through a first serial port, the other side of the embedded device is in communication connection with a plurality of main stations through a plurality of second serial ports, each main station is in communication connection with a target number of the second serial ports and the second serial ports connected between the different main stations are different. Each main station can finish communication by independently occupying one or more serial ports, isolation communication between different main stations is realized, therefore, the situations of mutual communication influence and data communication chaos due to the fact that polling data sending between different main stations is not effectively controlled when multiple main stations carry out question and answer type serialport protocol communication can be avoided, meanwhile, a communication serial port is independently distributed to each main station, and the integrity and safety of data transmission of multi-main-station communication are improved.

Description

technical field

[0001] The invention relates to the technical field of communication, in particular to a serial port communication system, method, device and electronic equipment. Background technique

[0002] Serial communication (Serial Communication) refers to a communication method for data transmission between the master station and the slave station through the serial bus according to the communication protocol. Serial port communication is a half-duplex mode. When using a question-and-answer serial port protocol (such as Modbus protocol) for communication, the master station sends request commands to multiple slave stations through the serial port in a polling manner, and when the slave station receives the request command, it replies with a response command. , that is, the slave station can only respond passively. When there are multiple master stations, the slave station cannot distinguish which master station sent the request command.

[0003] In the prior art, fo...

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