Serial port multi-machine communication circuit and method

Abstract

The invention discloses a serial port multi-computer communication circuit and a serial port multi-computer communication method, and solves the problems that the existing multi-computer communication method has high requirements on software design of a master computer and a slave computer, and the communication process is tedious. The circuit comprises a host, an AND gate logic chip, a 16-bit bus transceiver and two slaves, the 16-bit bus transceiver is composed of two data transceivers; wherein each data transceiver is provided with a control port OE and a control port DIR; when the host sends data to one of the slaves, the control port OE of one of the data transceivers is controlled to be at a low level and the control port DIR is controlled to be at a high level through the universal port of the host, and meanwhile, the control port OE of the other data transceiver is controlled to be at a high level; and when the host receives the data of one of the slaves, the control port OE of one of the data transceivers is controlled to be at a low level through the universal port of the host, the control port DIR is controlled to be at a low level, and meanwhile, the control port OE of the other data transceiver is controlled to be at a high level.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a serial port multi-computer communication circuit and method. Background technique [0002] Single-chip microcomputer is a kind of integrated circuit chip, which adopts VLSI technology to combine central processing unit CPU with data processing capability, random access memory RAM, read-only memory ROM, various I / O ports and interrupt systems, timers / counters, etc. A small but complete microcomputer system composed of functions integrated on a silicon chip. [0003] In terms of real-time data acquisition and data processing, single-chip microcomputer has the advantages of low cost, meeting general requirements, and short development cycle. It has a wide range of applications in smart home, computer network communication and data transmission, and industrial control automation. In various application scenarios, the exchange of information cannot be avoided, so ...

AI Technical Summary

Problems solved by technology

[0013] In order to solve the problem that the existing SCM multi-computer communication method has high requirements on the software design of the master and slave, the communication process is cumbersome. If one of the slaves fails, the communication bus will be occupied for a long time, which may lead to abnormal communication of the slaves on the entire bus. problem, the present invention provides a single-chip serial port multi-computer communication circuit and method with strong versatility, simple implementation, low cost, safety and reliability

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