单片机短消息收发系统

文档编号:DZXX030  文档字数:14135,页数:42

 摘要
 随着移动通信技术的迅猛发展以及用户数量的急剧增加，利用移动通信技术实现远程控制越来越具有研究价值。本文介绍了基于GSM网络利用SMS的无线远程监控终端的原理及其简化系统的设计实现。它由一个无线GSM模块和一个以单片机为核心的监控单元组成。无线GSM模块作为中介通过发送和接收短信来建立用户手机和单片机控制系统的远程通信，而单片机控制系统则运用AT指令通过串口与无线GSM模块建立通信，达到实现系统功能的目的。
 该系统可以通过改进应用于生产生活的各个领域，其最突出的优点在于它能实现准确实时的双向通信，而且由于GSM网络覆盖范围极为广泛，因此该系统不受地域环境的影响，同时对于用户来说该系统的操作极为方便，成本低，效益高。
 本文首先详细阐述了单片机短消息收发系统的硬件组成和设计结构以及单片机与无线GSM模块的接口方式，同时也详细介绍了短消息控制指令和短消息收发的协议数据单元格式进行了阐述。最后讨论了软件部分的结构设计和所能达到的功能。
 
 关键词：无线GSM通信模块，TC35，AT命令，单片机AT89C51
 
 
ABSTRACT
 Along with the mobile communication technology swift and violent development as well as the user quantity sharp growth, more and more has the research value using the mobile communication technology realization long-distance control. This article introduced uses SMS based on the GSM network the wireless long-distance monitoring terminal principle and its the simplification system design realization. It is composed by a wireless GSM module and take the monolithic integrated circuit as the core monitoring unit. The wireless GSM module took intermediary establishes the user handset and the monolithic integrated circuit control system long-distance correspondence through the transmission and the receive short note ,but the monolithic integrated circuit control system utilizes the AT instruction through the string mouth with the wireless GSM module establishment correspondence, achieves the realization system function the goal.
 This system may apply through the improvement to production and life, its most prominent merit lies in it to be able to realize the accurate real-time twp-way communication, moreover because the GSM network cover scope is extremely widespread, Therefore this system the region environment influence, simultaneously regarding the user was not said this system operation extremely convenient, cost low, the benefit is high.
 This article first in detail elaborated the monolithic integrated circuit short news receiving and dispatching system hardware composition and the design structure as well as the monolithic integrated circuit and the wireless GSM module connection way ,simultaneously also in detail introduced the short news control command and the short news receiving and dispatching protocol data unit form has carried on the elaboration. Finally discussed the function which the software partial structural design and can achieve.

 Keywords: Wireless GSM telecommunication Module ，TC35，AT command，
 Single-chip microcomputer ，AT89C51
  目   录
摘要 I
ABSTRACT II
第一章  绪论 1
1.1课题提出的背景和意义 1
1.2本课题的研究现状和发展方向 1
1.3本课题的主要设计工作 2
第二章 监控终端硬件设计 3
2.1系统描述 3
2.2 AT89C51模块 4
2.2.1 主要性能参数 4
2.2.2 各引脚功能概述 5
2.3 接口模块 7
2.4 RS-232接口简介 8
2.5 无线GSM模块 11
2.6 外围电路设计 11
2.6.1 复位设计 11
2.6.2 独立式按键 12
2.6.3 动作部分电路 14
2.6.4 电源部分电路 14
2.7小结 14
第三章  AT命令介绍 16
3.1 AT命令简介 16
3.2 PDU数据格式分析 17
3.3 常用AT命令详解 20
3.3.1.短信中心设置命令：AT+CSCA 20
3.3.2.选择短信息格式命令：AT+CMGF 20
3.3.3短信息到达提示命令：AT+CMGS 20
3.3.4阅读短信息命令：AT+CMGR 21
3.3.5短信息发送命令：AT+CMGS 21
3.3.6删除短信息命令：AT+CMGD 22
3.3.7 通信设置 22
第四章 系统软件设计 23
4.1系统软件功能 23
4.2 软件开发环境介绍 24
4.3系统软件流程 24
4.3.1主程序 24
4.3.2键盘扫描和去抖动子程序 24
4.3.3短信息发送子程序 25
4.3.4短信息接收子程序 26
第五章 系统调试 28
5.1 系统硬件调试 28
5.2 系统软件调试 28
第六章  系统设计总结 29
致谢 30
参考文献 31
附录1源代码 32

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