目录
一、设计要求........................................................1
1.1 基本要求 .....................................................1
1.2 扩展功能 ....................................................1
二、 总体方案设计...................................................1
2.1 方案论证 ....................................................1
2.1.1 方案一.................................................1
2.1.2 方案二.................................................1
2.2 总体设计框图 ................................................1
三、 硬件设计.......................................................2
3.1 单片机系统 ..................................................2
3.2 数字温度传感器模块 ..........................................3
3.2.1 DS18B20 性能 ...........................................3
3.2.2 DS18B20 外形及引脚说明 .................................4
3.2.3 DS18B20 接线原理图 .....................................4
3.2.4 DS18B20 时序图 .........................................4
3.2.5 数据处理...............................................6
3.3 显示电路 ....................................................7
3.4 声光报警电路 ................................................7
3.5 键盘输入电路 ................................................8
四、软件设计........................................................8
4.1 主程序模块 ..................................................8
4.2 读温度值模块 ................................................9
4.3 中断模块 ...................................................11
4.4 温度查询模块 ...............................................12
4.5 温度设定、报警模块 .........................................13
4.6 数码管驱动模块 .............................................15
五、总结...........................................................16
参考文献：.........................................................17
