毕业论文--基于单片机的Modem接口电路的设计及应用.doc

基于单片机的Modem接口电路的设计及应用
The Design and Application of Modem Interface Electric Circuit Based on MCU
摘要
本文主要研究基于单片机的Modem接口电路的设计,利用公共移动通信网络进行远程控制、网络数据收发器、控制设备与收发器的接口、中心计算机与通信网络的接口、设备控制软件等。
系统借助于控制中心和远端设备的GSM模块、概括的介绍了GSM模块收发短信的基本概念、串口控制SMS的基本原理以及单片机控制GSM模块工作的软件实现过程。利用移动通信公司的服务,通过控制中心计算机上的控制软件,对远端设备发送指令进行控制、数据采集。远端设备是以单片机为核心,单片机对GSM模块和被控制设备进行控制,并显示接收的数据。
掌握数据收发器GSM引擎模块的接口信号和控制码,主要是AT指令相关的知识和GSM模块出厂的一些资料。
设计出单片机采集被控对象信号及控制GSM引擎模块的电路板,主要用HT48进行控制。编写出单片机采集被控对象信号及控制GSM引擎模块的程序,控制GSM模块的程序在终端用可视化语言。
对系统进行调试,单片机能够正确采集被控对象信号,通过串行口发送给GSM引擎模块,并且单片机能够正确接收GSM引擎模块发过路的信号,对信号进行分析,对被控对象进行控制。
关键词:单片机;GSM;AT指令;移动网络;收发器接口
ABSTRACT
This paper main research the design and application of modem interface electric circuit based on MCU, utilizes work to control long-distance in public, network data transceiver, control equipment and interface, puter and interface, equipment work of transceiver control software, etc.
System control centers and using remote equipment GSM module, an overview of the GSM SMS transceiver module of the basic concepts Serial control of the basic s of SMS and GSM module MCU control the software process. panies use the service, through the control puter control software. Remote equipment to mands to control data acquisition. Remote equipment based on microcontroller core, MCU on GSM module and the control equipment control, and display the data received. Clarify data GSM transceiver module interface signals and control code, mand is mainly related to the knowledge and GSM module manufactured some of the information. MCU design object signal acquisition and control GSM module circuit board by HT48 under control.
Clear up the interface signal of the data transceiver GSM engine module and control yard, it is mainly some materials that knowledge of AT order and GSM module are dispatched from the factory.
Design MCU, use it accuse of target signal and control GSM circuit board, use HT48 to control mainly. Design another MCU which can receive message from the one-c