XXX 大学毕业设计
1
前言.............................................................................................................................................2
1 总体方案设计.......................................................................................................................3
1.1 方案论证....................................................................................................................4
1.1.1 传感器.............................................................................................................4
1.1.2 主控部分.........................................................................................................4
2 硬件电路的设计...................................................................................................................5
2.1 电源电路....................................................................................................................5
2.2 温度采集电路............................................................................................................6
2.2.1 DS18B20 简介..................................................................................................6
2.2.2 电路设计.........................................................................................................8
2.2.3 无线传输电路模块.........................................................................................9
3 无线发送与接收电路...........................................................................................................9
3.1 无线发送电路............................................................................................................9
3.2 无线接收模块..........................................................................................................10
4 显示电路.............................................................................................................................11
4.1 字符型液晶显示模块..............................................................................................11
4.2 字符型液晶显示模块引脚......................................................................................11
4.3 字符型液晶显示模块内部结构..............................................................................12
5 单片机 AT89S52..................................................................................................................13
5.1 AT89S52 简介...........................................................................................................13
5.2 AT89S52 引脚说明...................................................................................................14
6 软件设计.............................................................................................................................16
6.1 系统概述..................................................................................................................16
6.2 程序设计流程图......................................................................................................16
6.3 温度传感器多点数据采集......................................................................................17
7 调试及结果.........................................................................................................................17
7.1 测试环境及工具......................................................................................................17
7.2 测试方法..................................................................................................................17
7.3 测试结果分析..........................................................................................................17
8 总结.....................................................................................................................................18
附录 1： 电路原理总图..........................................................................................................19
附录 2： 发射部分主程序......................................................................................................20
附录 3： 接收部分主程序......................................................................................................26
参考文献...................................................................................................................................31
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