Serial bus redundant communication method oriented to multi-point Internet application

Abstract

The invention discloses a serial bus redundant communication method oriented to multi-point Internet application. The method comprises the following steps that: a master site finishes framing and parallel-to-serial operation according to a command format, and sending a command on any four data transmission channels in all of five data transmission channels of a serial bus; a slave site monitors a data bus and performs identification and command extraction operation on the channels, finishes framing and parallel-to-serial operation after a transmission command specific to the slave site is detected, and makes a response; if a response format is wrong or no response is made, the master site sends a fault diagnosis command; the master site detects a fault diagnosis response made by the slave site, and reselects four data transmission channels from the five data transmission channels for serving as data transmission channels to be used in next transmission; and the master site sends the last transmission command once again till a correct transmission response is received or the retransmission times reach a preset maximum value.

Description

technical field [0001] The invention belongs to the communication field, and relates to a serial bus redundant communication method oriented to multipoint interconnection applications. Background technique [0002] At present, the communication bus between electronic devices can be divided into two types: parallel bus and serial bus. Parallel bus is widely used in computer field, such as PCI bus and ISA bus. Its characteristic is that parallel bus is usually composed of address bus, control bus and data bus. It is conducive to the miniaturization of equipment, and it is difficult to meet the needs of some occasions with strict restrictions on the size of the control device. Secondly, the bus communication does not adopt a redundant mechanism, and a connection failure of a signal line will cause the communication task to fail. [0003] There are more types of serial buses than parallel buses. According to the physical connection type of the communication site, it can be div...

AI Technical Summary

Problems solved by technology

But at present, in the field of multi-point interconnection serial communication, there is no report on the method of automatic fault diagnosis and data transmission channel automatic switching in multiple data transmission channels.

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