目 录
一、引言 ...............................................................................5
(一)课题研究的背景 .................................................................5
(二)课题研究的目的和意义 ...........................................................7
二、硬件电路的设计 .....................................................................6
(一)系统设计的框架 .................................................................6
(二)单片机最小系统电路 .............................................................8
(三)单片机的选型 ...................................................................7
1.STC89C52 单片机简介 ...........................................................7
2.STC89C52 单片机时序 ...........................................................8
3.STC89C52 单片机引脚介绍 .......................................................8
(四)温度传感器电路 ................................................................10
(五)系统电源电路的设计 ............................................................12
(六)LCD 显示电路 ...................................................................13
(七)串口通讯电路 ..................................................................14
(八)按键接口电路 ..................................................................14
(九)DS1302 时钟电路 ................................................................15
(十)存储器接口电路 ................................................................15
三、系统软件设计 ......................................................................16
(一)计算温度子程序 ................................................................16
(二)按键处理子程序 ................................................................17
(三)计算温度子程序 ................................................................19
(四)显示数据刷新子程序 ............................................................19
四、电路原理与接线 ....................................................................20
五、实物图 ............................................................................22
(一)组成与功能 ...................................................................23
六、结束语 ............................................................................24
参考文献 ..............................................................................25
致谢 ..................................................................................25