目录
摘 要 ........................................................................................................................................................I
1 概述........................................................................................................................................................1
1.1 设计背景 ...................................................................................................................................1
1.2 设计意义 ...................................................................................................................................1
1.3 设计目标 ...................................................................................................................................1
2 方案总体设计.........................................................................................................................................2
2.1 总体设计 ...................................................................................................................................2
2.2 方案工作原理 ...........................................................................................................................2
3 硬件设计.................................................................................................................................................3
3.1 AT89C51 芯片 ...........................................................................................................................3
3.2 时钟电路 ..................................................................................................................................3
3.3 温度传感电路 ..........................................................................................................................4
3.4 温度报警电路 ..........................................................................................................................5
3.5 显示电路 ..................................................................................................................................5
4 软件设计................................................................................................................................................6
4.1 系统流程 ..................................................................................................................................6
4.2 延时源代码 ..............................................................................................................................6
4.3 数码管显示代码 ......................................................................................................................6
4.4 DS18B20 初始化 .......................................................................................................................7
4.5 写命令函数 ..............................................................................................................................8
4.6 读取温度函数 ..........................................................................................................................8
4.7 温度数据处理函数 ..................................................................................................................8
4.8 报警提示电路函数 ..................................................................................................................9
4.9 主函数 ......................................................................................................................................9
5 系统仿真与调试 .................................................................................................................................10
5.1 Proteus ..................................................................................................................................10
5.2 软件调试 ................................................................................................................................10
5.3 硬件调试 ................................................................................................................................11
6 运行结果分析.......................................................................................................................................11
6.1 仿真图 ....................................................................................................................................11
6.2 运行结果 ................................................................................................................................11
6.3 运行分析 ................................................................................................................................12
总结..........................................................................................................................................................13
参考文献..................................................................................................................................................14
