目 录
1. 引言 ..............................................................................................................................1
1.1 目的和意义 .........................................................................................................1
1.2 研究概况与发展趋势 .........................................................................................1
1.3 本文主要内容 .....................................................................................................2
2. 总体方案论证与设计 ..................................................................................................2
2.1 主控模块的选型和论证 ......................................................................................2
2.2 显示模块的选型和论证 ......................................................................................3
2.3 放大电路的选型和论证 ......................................................................................3
2.4 系统整体设计概述 ..............................................................................................4
2.5 系统主要功能 .....................................................................................................4
3.系统硬件电路设计 ........................................................................................................4
3.1 三极管放大电路设计 ..........................................................................................4
3.2 整形模块设计 ......................................................................................................5
3.2.1 施密特触发器芯片介绍 ............................................................................6
3.3.2 74HC14 电路设计......................................................................................7
3.3 分频模块设计 ......................................................................................................7
3.3.1 74HC390 芯片介绍....................................................................................7
3.3.2 74HC390 分频电路设计............................................................................8
3.4 主控模块 ..............................................................................................................8
3.4.1 STC89C52 单片机主要特性 .....................................................................9
3.4.2 STC89C52 单片机的中断系统 ...............................................................12
3.4.3 单片机最小系统设计 .............................................................................13
3.5 LCD 液晶显示器简介 .......................................................................................13
3.5.1 液晶原理介绍 .........................................................................................13
3.5.2 液晶模块简介 ..........................................................................................14
3.5.3 液晶显示部分与 STC89C52 的接口 ......................................................15
4.系统软件设计 ..............................................................................................................16
4.1 系统软件总体设计 ............................................................................................16
4.2 程序设计原理 ....................................................................................................17
5.系统调试及其实物测试结果分析 ..............................................................................19
5.1 硬件调试 ............................................................................................................19
5.2 软件调试 ............................................................................................................19
5.3 实物测试 ............................................................................................................19
5.4 结果分析 ............................................................................................................21
6.结论 ..............................................................................................................................22
参考文献 .........................................................................................................................23
谢辞 .................................................................................................................................25
附录 1 ..............................................................................................................................26
附录 2 ..............................................................................................................................27
