3.3 DS18B20 芯片简介..........................................................................................14
3.3.1 温度传感器的历史及简介......................................................................14
3.3.2 DS18B20 性能特点与内部结构 .............................................................15
3.3.3 DS18B20 工作时序 .................................................................................20
3.3.4 DS18B20 的操作协议 .............................................................................22
3.3.5 DS18B20 序列号编码 .............................................................................24
3.3.6 DS18B20 的测温原理 .............................................................................24
3.3.7 DS18B20 的测温流程 .............................................................................26
3.3.8 DS18B20 数据校验与纠错 .....................................................................26
3.3.9 DS18B20 在测温系统中的应用 ..........................................................28
3.3.10 测温系统的硬件工作原理....................................................................28
3.3.11 注意事项.............................................................................................28
第四章软件设计 .....................................................................................................29
4.1 设计思路 .......................................................................................................29
4.2 程序设计 ........................................................................................................31
4.2.1 主程序.....................................................................................................31
4.2.2 读出温度子程序.....................................................................................31
4.2.3 温度转化命令子程序..............................................................................32
4.2.4 计算温度子程序......................................................................................32
4.2.5 显示数据刷新子程序..............................................................................33
4.2.6 LED 显示程序模块 .................................................................................33
第五章：系统调试.................................................................................................34
5.1 硬件调试 .......................................................................................................34
5.1.1 硬件静态的调试...................................................................................34
5.1.2 系统硬件调试.......................................................................................35
5.2 软件调试 .......................................................................................................35
5.3 软硬联调 ........................................................................................................35
