基于单片机的家用智能总线式开关设计

文档编号:JD806  文档字数:10470,页数:22

基于单片机的家用智能总线式开关设计

摘  要： 智能总线式开关是现代智能家居的一个典型应用，基本功能是住户通过网络或者电话远程控制家庭内部设备。本设计的通信网络采用总线网，以双绞线作为传输媒质，通信方式采用DTMF编解码技术实现数据通信。其中硬件部分由控制开关电路、主机电路以及电源电路组成；软件部分由主机程序、分机程序组成。整个过程就是单片机负责读取按键，采用普通I/O口方式控制MT8880的软件实现，进行收发数据。整个系统是集中控制电源，故抗干扰性强。
关键词：智能总线式开关；双绞线；DTMF编解码技术；MT8880

Intelligent Bus Switch Based On A Single Chip 

Abstract: Intelligent Bus Switch is a typical application which is a modern development of intelligent home . Its basic function is that households can remote control the device in family by the telephone network. Take the price performance ratio, wiring, and expansion into consideration, to use the bus network as communication networks , the twisted pair as the transmission medium, and the DTMF codec data technology to implement communication.  The hardware circuit is made up of  the control switch circuit, the host circuit and the power supply circuit;While the software program is composed by the host and the extension procedures. The whole process is that the single chip is responsible for reading keys, to use the ordinary I / O port to control  the implemention of the MT8880 software for send and receive data.  The entire system which the power is centralized controlled has strong anti-interference.
Key words: Intelligent Bus Switch ; twist pair ;DTMF code technology ;MT8880

目录
摘  要 I
Abstract I
1 引言 1
1.1 智能家居的发展现状及内容 1
1.2 智能总线式开关的功能及特点 2
2 系统方案设计与论证 2
2.1 网络方案设计 2
2.1.1 通信网络拓扑结构设计 2
2.1.2 传输媒质的选择 3
2.2 通信编解码方式设计 4
2.2.1 DTMF编码方法 4
2.2.2 DTMF编解码器的原理 5
2.2.3 编解码的实现—— MT8880双音多频收发器的介绍 5
2.3 硬件电路设计 7
2.3.1 通信结点电路 7
2.3.2  主机的电路原理与分析 9
2.4  电源电路设计 9
2.5  软件设计 11
2.5.1 软件组成及结构 11
2.5.2  用普通I/O口控制MT8880的软件实现 12
3.总结 18
4. 参考文献 19
谢   辞 20

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