目录
摘 要..........................................................................................................................III
Abstract ........................................................................................................................IV
1 绪论............................................................................................................................1
1.1 课题的来源......................................................................................................1
1.2 课题的意义......................................................................................................1
1.3 数字温度计国内外发展现状..........................................................................2
1.3.1 温度传感器的研究现状.........................................................................2
1.3.2 单片机的发展的研究现状.....................................................................3
1.4 课题研究的主要内容......................................................................................5
2 数字温度计的总体设案............................................................................................6
3 系统硬件电路设计....................................................................................................7
3.1 电路原理..........................................................................................................7
3.2 各单元总体说明..............................................................................................8
3.3 主控制器 AT89S51...........................................................................................8
3.4 4 位共阳数码管动态扫描..............................................................................9
3.5 温度传感器 DS18B20.....................................................................................10
3.6 电路原材料清单............................................................................................17
3.7 使用工具及仪表清单....................................................................................18
4 系统软件设计..........................................................................................................19
4.1 流程图............................................................................................................19
4.2 读出温度子程序............................................................................................19
4.3 温度转换命令子程序....................................................................................20
4.4 数字温度计程序清单....................................................................................20
结论..............................................................................................................................22
参考文献......................................................................................................................23
致谢..............................................................................................................................24
附录..............................................................................................................................25