无线病房呼叫系统硬件设计.doc资源-CSDN文库

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前言........................................................................................................................................................................1

第 1 章系统概述.........................................................................................................................................2

1.1 系统功能 ..................................................................................................................................................2

1.2 系统构成图 ..............................................................................................................................................2

1.3 系统方案设计.........................................................................................................................................2

第 2 章主要元器件介绍........................................................................................................................4

2.1 单片机介绍 .............................................................................................................................................4

2.1.1 AT89S51 单片机介绍................................................................................................................4

2.1.2 51 单片机与 74HC164 静态显示接口 ................................................................................9

2.2 PT2262/PT2272 无线/发送接受模块 ............................................................................................10

2.2.1 pt2262/pt2272 解码芯片 ......................................................................................................10

2.2.2 基于 PT2262 的无线编码模块..............................................................................................14

2.2.3 基于 PT2272 的无线解码模块..............................................................................................15

2.3 数码管介绍 ............................................................................................................................................17

2.4 74LS00 芯片介绍.................................................................................................................................20

2.5 蜂鸣器简介 ............................................................................................................................................21

2.5.1 蜂鸣器的分类.................................................................................................................................21

2.5.2 有源/无源蜂鸣器区别 ..............................................................................................................21

2.5.3 驱动方式 ..........................................................................................................................................21

第 3 章硬件电路设计............................................................................................................................24

3.1 系统电路设计...................................................................................................................................24

3.2 单片机外围电路设计 ....................................................................................................................25

3.3 LED 显示电路设计.........................................................................................................................25

3.4 单片机与无线接收模块连接 ......................................................................................................26

3.5 无线发送模块...................................................................................................................................26

3.6 无线接收模块...................................................................................................................................27

3.7 发声电路设计 ...................................................................................................................................28

3.8 提示灯电路设计 ..............................................................................................................................28

第 4 章系统软件简介............................................................................................................................29

4.1 系统总流程图 ...................................................................................................................................29

4.2 系统平台介绍 ...................................................................................................................................30

4.2.1 汇编语言介绍 ........................................................................................................................30

4.2.2 LCA51 软件简介..........................................................................................................................31

第 5 章系统测试.......................................................................................................................................37

5.1 硬件调试.................................................................................................................................................37

5.1.2 导通性测试 ..................................................................................................................................37

5.1.3 防短接测试..................................................................................................................................37

5.1.4 通电测试.......................................................................................................................................38

5.2 故障分析及解决方案 ........................................................................................................................38

5.2.1 系统无显示输出..........................................................................................................................38

5.2.2 显示数据不正确..........................................................................................................................38

结束语................................................................................................................................................................39

参考文献 ..........................................................................................................................................................40

致谢......................................................................................................................................................................41

参考文献 ..........................................................................................................................................................42

附录一：电路原理图 ..............................................................................................................................43

附录二：实物图.......................................................................................................................................44

附录三：元器件清单 ..............................................................................................................................45