單片F(xiàn)330實(shí)現(xiàn)信號隔離和遠(yuǎn)程通訊設(shè)計(jì)

電氣自動化論文編號:ZD329  論文字?jǐn)?shù):15523,頁數(shù):40

 目　　錄

一 引言 1
 1.1課題研究的意義 1
 1.2國內(nèi)外研究現(xiàn)狀 1
 1.3課題主要內(nèi)容 1
二 信號隔離 3
 2.1信號隔離的重要意義 3
 2.2信號隔離器 3
 2.3 ADuM1201數(shù)字隔離器 3
 2.3.1 iCoupler®技術(shù)與數(shù)字隔離器 3
 2.3.2 ADuM1201的結(jié)構(gòu)及特性 3
三 C8051F330混合信號微控制器 6
 3.1結(jié)構(gòu)及主要特性 6
 3.2 CIP-51微控制器 8
 3.3 SMBus串行總線 10
 3.4異步串行通信 12
四 RS485遠(yuǎn)程通訊 14
 4.1遠(yuǎn)程通訊概述 14
 4.2 RS485總線 14
 4.2.1 RS485串行接口標(biāo)準(zhǔn) 14
 4.2.2 RS485電氣特性 15
 4.2.3低功耗RS485收發(fā)器MAX485 16
五 系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn) 18
 5.1系統(tǒng)硬件設(shè)計(jì) 18
 5.1.2電源電路設(shè)計(jì) 18
 5.1.2隔離電路設(shè)計(jì) 19
 5.1.3遠(yuǎn)程通信電路設(shè)計(jì) 19
 5.2系統(tǒng)軟件設(shè)計(jì) 22
 5.2.1 UART0工作方式 22
 5.2.2 串行口AD采集程序 24
 5.2.3 SMBus通信 25
 5.2.4 SMBus與上位機(jī)數(shù)據(jù)通信程序 28
六 結(jié)論 30
謝辭 31
參考文獻(xiàn) 32
附錄 33

摘　　要

 信號隔離與遠(yuǎn)程數(shù)據(jù)通信在工業(yè)生產(chǎn)中日益發(fā)揮著重要的作用。為了適應(yīng)目前工業(yè)現(xiàn)場的復(fù)雜環(huán)境和分散的工業(yè)控制系統(tǒng)，開發(fā)一種基于單片機(jī)的信號隔離和遠(yuǎn)程通訊技術(shù)已經(jīng)勢在必行。
 本文介紹了八位混合型單片機(jī)C8051F330實(shí)現(xiàn)信號隔離和遠(yuǎn)程數(shù)據(jù)通信。主要闡述了如何利用新型數(shù)字隔離器ADuM1201將工業(yè)現(xiàn)場的模擬信號進(jìn)行隔離，并送入單片機(jī)進(jìn)行相應(yīng)的數(shù)據(jù)處理。經(jīng)過通信協(xié)議的轉(zhuǎn)換實(shí)現(xiàn)了單片機(jī)F330的雙向串行總線SMBusI/O接口與RS485遠(yuǎn)程通信網(wǎng)絡(luò)的數(shù)字信號傳輸。用ADuM1201代替?zhèn)鹘y(tǒng)的光電隔離器件實(shí)現(xiàn)工業(yè)現(xiàn)場的信號隔離，相對于傳統(tǒng)的隔離方法，降低了系統(tǒng)功耗，簡化了系統(tǒng)結(jié)構(gòu)，更增強(qiáng)了系統(tǒng)穩(wěn)定性。本設(shè)計(jì)采用了RS485總線，實(shí)現(xiàn)了PC對前置單片機(jī)系統(tǒng)的遠(yuǎn)程集中監(jiān)測、控制和管理，解決了遠(yuǎn)距離通信的問題。
 
關(guān)鍵詞:信號隔離　　C8051F330　　遠(yuǎn)程通訊　　RS485

Monolithic F330 signal isolation and long-distance communication design
Abstract

 Signal isolation and long-distance data communications in industrial production plays an increasingly important role. In order to adapt to the current site of the industrial complex and decentralized environment of industrial control systems, developing a SCM signal isolation and long-range communications technology has been inevitable.
 In this paper, eight SCM C8051F330 mixed signal isolation and long-distance data communications. Mainly on how to use new digital isolators ADuM1201 industrial analog signal to the scene of isolation and into the SCM corresponding data processing. After the communication protocol conversion to achieve the SCM F330 two-way serial bus SMBusI / O interface with the long-distance telecommunications network RS485 digital signal transmission. ADuM1201 replace the traditional use of optoelectronic devices isolated industrial site signal isolation, compared to the traditional method of isolation, lower power consumption of the system, simplify the structure of the system, enhance the stability of the system. The design used by RS485 bus, and the PC to pre-concentrate microcontroller system of remote monitoring, control and management to solve the long-distance communications problems.
 
 Key words: signal isolation　　C8051F330　　long-distance communication　　RS485