基于LCD时钟温度计的设计(有实物).doc

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1、[摘要]：单片机就是微控制器，是面向应用对象设计、突出控制功能的芯片。单片机接上晶振、复位电路和相应的接口电路，装载软件后就可以构成单片机应用系统。将它嵌入到形形色色的应用系统中，就构成了众多产品、设备的智能化核心。本设计就是应用单片机强大的控制功能制作而成的LCD电子时钟温度计，该包括三大功能：实时显示年、月、日、时、分、秒；实时监测环境温度；本设计采用的是AT89S52单片机，该单片机采用的MCU51内核，因此具有很好的兼容性，内部带有8KB的ROM，能够存储大量的程序，最突出特点是具有ISP在系统烧写

2、功能，使得烧写程序更加方便。计时芯片采用DALLAS公司的涓细充电时钟芯片DS1302，该芯片通过简单的串行通信与单片机进行通信，时钟/日历电路能够实时提供年、月、日、时、分、秒信息，采用双电源供电，当外部电源掉电时能够利用后备电池准确计时。温度检测采用DALLAS公司的数字化温度传感器，该芯片采用的是独特的“一线总线”的方式与单片机进行通信，一线总线独特而且经济的特点，是用户可以轻松的组建传感器网络，为测量系统的构建引入全新的概念。实时温度采用一线总线的方式传输大大的提高了信号的抗干扰性，分辨率可通过软件

3、设置，其小巧的体积为各种环境下测量温度提供了方便。显示器件采用通用型1602液晶，可显示32个字符，如果使用数码管来做显示器件需消耗大量的系统资源，因此采用低功耗的1602液晶，该液晶显示方便，功能强大，完全能满足数字时钟温度计的显示要求。通过此次设计能够更加牢固的掌握单片机的应用技术，增强动手能力、硬件设计能力以及软件设计能力。[关键词]:单片机；Keil；DS1302；DS18B20；LCD液晶目录第一章绪论················································

4、···4第二章设计任务.··············································52.1设计任务··············································52.2设计要求··············································5第三章总体方案设计与论证·····································63.1液晶显示模块······························

5、·············63.2实时时间计算模块·······································63.3实时环境温度采集模块···································73.4设置模块··············································8第四章总体方案组成框图·······································8第五章系统硬件设计····························

6、···············95.1LCD显示模块············································95.2实时时间计算模块······································155.3实时环境温度检测模块··································205.4设置模块··············································26第六章系统软件设计·····················

7、·····················27第七章系统硬件电路设计······································28第八章系统硬件PROTEUS仿真原理图····························31第九章系统硬件仿真运行情况图································319.1显示实时时间··········································329.2显示当前温度·······················

8、···················339.3时间设置··············································34结语···························································35致谢··························································36参考文献···