目录
1 前言 .............................................................................................................................................1
1.1 概述 .................................................................................................................................1
1.2 系统设计任务分析 ...........................................................................................................2
2 短消息简介 .................................................................................................................................2
2.1 短消息概述 .......................................................................................................................2
2.1.1 短消息业务分类 .....................................................................................................3
2.1.2 短消息业务的优缺点 .............................................................................................3
2.2 短消息技术分析 .............................................................................................................4
2.2.1 AT(Attention)指令集 ............................................................................................4
2.2.2 短消息模式及编码方式 .........................................................................................5
3 系统硬件介绍及设计 .............................................................................................................11
3.1 系统电源电路 ..................................................................................................................11
3.2 TC35 模块极其外围电路介绍 ........................................................................................12
3.2.1 TC35 模块介绍 ......................................................................................................12
3.2.2 TC35 模块外围电路 ..............................................................................................15
3.3 单片机外围电路设计 ...................................................................................................15
3.3.1 单片机介绍 ...........................................................................................................15
3.3.2 单片机通信电路 ....................................................................................................19
4 系统程序设计 ...........................................................................................................................19
5 结论 ...........................................................................................................................................21
参考文献 .......................................................................................................................................21
