1
目 录
1 引言 ..............................................................................................................................2
1.1 目的和意义 ........................................................................................................2
1.2 研究概况及发展趋势 ........................................................................................2
1.3 本系统主要功能 ................................................................................................3
2. 总体方案论证与设计 .................................................................................................4
2.1 主控模块的选型和论证 ....................................................................................4
2.2 显示模块的选型和论证 ....................................................................................4
2.3 语音模块的选型和论证 ....................................................................................4
2.4 功率放大模块的选型和论证 ............................................................................5
2.5 系统整体设计概述 ............................................................................................5
3.系统硬件电路设计 .......................................................................................................6
3.1 主控模块 ............................................................................................................6
3.1.1 STC89C52 单片机主要特性 ..................................................................6
3.1.2 STC89C52 单片机的中断系统 ..............................................................9
3.1.3 单片机最小系统设计 .............................................................................9
3.2 LCD 液晶显示器简介 .......................................................................................9
3.2.1 液晶原理介绍 ........................................................................................9
3.2.2 液晶模块简介 .......................................................................................10
3.2.3 液晶显示部分与 STC89C52 的接口 ...................................................11
3.3 键盘模块设计 ..................................................................................................11
3.4 语音存储模块设计 ..........................................................................................12
3.4.1 芯片性能简述和引脚图 ......................................................................12
3.4.2 ISD4004 芯片主要引脚描述................................................................12
3.4.3 SPI 协议 ................................................................................................13
3.5 功率放大模块的设计 ......................................................................................15
3.6 电源稳压模块设计 .........................................................................................15
4.系统软件设计 .............................................................................................................17
4.1 编程工具软件 Keil C51...................................................................................17
4.2 程序设计原理 ..................................................................................................17
4.3 系统软件流程图 ..............................................................................................18
5.系统调试 .....................................................................................................................19
5.1 硬件调试 ..........................................................................................................19
5.2 软件调试 ..........................................................................................................19
5.3 调试结果 ..........................................................................................................19
6.结论 .............................................................................................................................20
附录 ................................................................................................................................22
系统整体原理图 ............................................................................................................22
系统源程序 ....................................................................................................................23
