目 录
1.绪论 .................................................................................................................................................................1
1.1 课题背景 ..............................................................................................................................................1
1.2 国内外发展现状 ..................................................................................................................................1
1.3 本设计的内容及任务 ..........................................................................................................................2
1.3.1 设计内容 ...................................................................................................................................2
1.3.2 设计任务 ...................................................................................................................................2
2.系统总体设计 .................................................................................................................................................3
2.1 系统概述 ..............................................................................................................................................3
2.2 系统工作原理 ......................................................................................................................................3
2.3 系统器件的选择 ..................................................................................................................................4
2.3.1 单片机的选择 ...........................................................................................................................4
2.3.2 温度传感器的选择 ...................................................................................................................5
2.3.3 显示器的选择 ...........................................................................................................................8
3.系统的硬件设计 ...........................................................................................................................................10
3.1 单片机最小系统的设计 ....................................................................................................................11
3.1.1 时钟电路的设计 ....................................................................................................................11
3.1.2 复位电路的设计 .....................................................................................................................11
3.2 温度采集模块的设计 ........................................................................................................................12
3.3 LCD 显示电路 ...................................................................................................................................13
3.4 键盘电路 ...........................................................................................................................................14
3.5 声光报警电路 ...................................................................................................................................15
4.系统的软件设计 ...........................................................................................................................................16
4.1 工作方案简介 ....................................................................................................................................16
4.2 主程序流程图 ....................................................................................................................................16
4.3 温度读取转换模块 ............................................................................................................................17
4.4LCD 液晶显示模块 ............................................................................................................................19
4.5 按键处理模块 ....................................................................................................................................20
4.6 声光报警模块 ....................................................................................................................................21
5.系统的软件仿真 ...........................................................................................................................................22
6.总结 ...............................................................................................................................................................23
参考文献 ..........................................................................................................................................................24
答 谢 ............................................................................................................................................................25
附 录 1 系统硬件原理图 ...........................................................................................................................26
附 录 2 程序设计 .......................................................................................................................................26
