目 录
前 言 ..............................................................................................3
第 1 章 GPS 系统简介及设计方案选择 ...........................................5
1.1 GPS 系统简介 .......................................................................5
1.1.1 GPS 由来及发展 ..........................................................5
1.1.2 GPS 定位基本原理.......................................................5
1.1.3 GPS 接收机定位流程 ...................................................6
1.1.4 任务的描述 .................................................................6
1.2 设计方案选择 ......................................................................6
1.2.1 方案一 .........................................................................7
1.2.2 方案二 ..........................................................................7
第 2 章 系统硬件设计 .....................................................................8
2.1 单片机 ..................................................................................8
2.2 GPS 模块................................................................................9
2.2.1 概述.............................................................................9
2.2.2 主要技术参数 .............................................................9
2.2.3 管脚介绍 .....................................................................9
2.3 显示部分 ............................................................................10
2.4 电源部分 ............................................................................11
2.5 晶体振荡器 ........................................................................11
2.6 键盘部分 ............................................................................12
第 3 章 系统相关协议介绍 ............................................................13
3.1 GR-87 协议 .........................................................................13
3.1.1 协议简介 ...................................................................13
3.1.2 数据格式 ...................................................................13
3.2 串行通信 .............................................................................14
3.2.1 异步通信特点............................................................14
3.2.2 异步通信协议............................................................14
3.2.3 中断...........................................................................15
3.3 液晶显示协议 ....................................................................19
