XXX学院
毕 业 论 文
课题名称： 基于单片机的万年历设计
作 者： XXX
学 号： XXX
系 别：___ 电子工程系
专 业：__ 电子信息工程技术_
1
指导教师：_______ XXX XX
XX
2 年XX
月日
摘 要
本设计以单片机芯片STC89C52为中心，通过外挂接DS12C887作为
时钟芯片，为系统实时的更新时间、日历等。DS18B20作为温度传感器芯片，用于实时采集当前所处的环境温度。1602液晶作为实时显示器件，显示单片机采集的所有数据。当在公共场所时，为了方便调节时间，外加红外遥控和键盘两种方式调时功能。于此，构成了一个实时时钟万年历系统。最后，通过软件对其原理图进行绘制和程序的编写，并且调试运行。
关键词：单片机芯片STC89C52；DS12C887芯片；DS18B20温度传感器；
LCD1602液晶；红外遥控
Abstract
The design on the single chip computer chip STC89C52 as the center, through the plugin meet DS12C887 as the clock chip, real-time updates for the system time, calendar, etc. As the temperature sensor DS18B20 chip to the real-time data acquisition at this temperature environment. 1602 LCD as real-time display device, shows all of the data collection single chip microcomputer. When in a public place, in order to facilitate the regulating time,
plus infrared remote control and keyboard two ways when the function. In this, and form a real time clock calendar system. Finally, through the software to its principle chart draw and the writing of the program, and debug operation.
Keywords: single chip microcomputer chip STC89C52； DS12C887 chip ；DS18B20 temperature sensor； LCD1602 liquid crystal ；infrared remote control
目 录
1 引言 ··································································································
1.1课题的来源和意义....................................................................................................
1.2系统总体方案介绍....................................................................................................
2 方案论证 ···························································································
2.1 时钟芯片的选择 ··············································································
2.2显示器件的选择 ···············································································
3 单元电路设计 ·····················································································
3.1 DS12C887时钟电路设计 ···································································
3.1.1 DS12C887时钟芯片概述····························································
3.1.2 时钟精度 ···············································································
3.1.3 时钟、日历和闹钟单元 ·····························································
3.1.4 控制寄存器 ············································································
3.1.5 基本原理 ···············································································
3.1.6典型工作电路 ········································································· 1
3.1.7工作时序 ··············································································· 1
3.1.8主要程序分析 ········································································· 1
3.2 1602液晶显示电路设计 ···································································· 1
3.2.1 1602液晶概述 ········································································ 1
3.2.2 1602液晶基本原理 ·································································· 1
3.2.3 1602液晶工作时序 ·································································· 1
3.2.4 指令说明 ·············································································· 1
3.2.5 1602液晶主要程序分析 ···························································· 1