目录
1 智能仪器仪表的简介 ................................................................................................................................1
1.1 智能仪器仪表简介 ...........................................................................................................................1
1.2 智能仪器仪表的作用 .......................................................................................................................2
1.3 本课题的背景和意义 .......................................................................................................................2
2 系统设计简介 ............................................................................................................................................3
2.1 数字温度计简介 ..............................................................................................................................3
2.2 设计要求 ..........................................................................................................................................3
2.3 设计方案论证 ..................................................................................................................................3
3.系统硬件设计 ..............................................................................................................................................5
3.1 主控制器选择 ...................................................................................................................................5
3.2 显示电路 ...........................................................................................................................................5
3.3 温度传感器简介 ...............................................................................................................................6
3.4 蜂鸣器模块电路 ...............................................................................................................................7
3.6 电源模块 ...........................................................................................................................................8
4 设计语言及软件介绍 ................................................................................................................................8
4.1 C51 语言介绍 ...................................................................................................................................8
4.2 keil uvision4 软件介绍 ...............................................................................................................9
5 系统软件设计 ..........................................................................................................................................10
5.1 概述 ................................................................................................................................................10
5.2 系统程序设计模块 ........................................................................................................................10
5.2.1 主程序 .................................................................................................................................10
5.2.2 LCD 写指令子函数 .............................................................................................................11
5.2.3 LCD 写数据子函数 ..............................................................................................................11
5.2.4 LCD 写字符串子函数 ........................................................................................................12
5.2.5 LCD 初始化子函数 .............................................................................................................13
5.2.6 DS18B20 复位子函数 .........................................................................................................14
5.2.7 DS18B20 读数据子函数 .....................................................................................................15
5.2.8 DS18B20 写数据子函数 .....................................................................................................16
5.2.9 读取温度值并转换子函数 ................................................................................................17
5.2.10 显示温度子函数 ..............................................................................................................18
5.2.11 设置报警值子函数 ..........................................................................................................18
5.2.12 报警子程序 .......................................................................................................................19
5.3 控制源程序 ....................................................................................................................................19
5.3.1 C51 程序 .............................................................................................................................19
5.3.2 程序清单 .............................................................................................................................26
5.4 调试及仿真 ....................................................................................................................................26
5.4.1 温度计功能仿真 .................................................................................................................27
5.4.2 设置报警功能仿真 .............................................................................................................27
