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目 录

1 绪 论1
1.1 引言1
1.2 单片机应用系统的设计方法2
2 电子元器件介绍4
2.1 AT89S52单片机4
2.2 DS1302时钟芯片9
2.3 LCD1602液晶介绍12
3 时间控制器硬件系统的设计与使用功能说明15
3.1 设计方案的确定15
3.2 时间控制器的设计要求15
3.3 设计原理图16
3.4 时间控制器的基本功能16
3.5 使用功能说明17
4 软件设计方案18
4.1 设计思路18
4.2 设计流程18
4.3 程序调试26
5 结论28
参考文献29
致谢30
附录31

摘要

自从时钟诞生的那天起,它就成为了人类不可或缺的朋友。它出现在人们活动的每一个场所。而微电脑时间控制器是人们现代生活当中出现的最基本的电子产品,研究运用以及扩展它有着非常的现实意义。它最基本的功能可实现计时、调时、闹铃设置等等,是多功能的电子时钟。
本设计是以AT89S52单片机为核心，并且通过对时钟芯片DS1302的控制来实现，有计时和倒计时功能，而且时间精度较高，有掉电不丢失功能。本程序是C程序来完成，在KEIL软件上面进行编译和仿真，以LCD1602为输出显示，蜂鸣器为闹铃进行打铃。在硬件上通过四个按键来进行人机交汇。通过按键，可以进行打铃设置、计时和倒计时功能设置及调整时间等方式的设置。

关键词：时间控制器；时钟芯片；单片机；人机交汇

THE ACHIEVEMENT OF MICROCOMPUTER TIME CONTROLLER IN SOFTWARE

ABSTRACT

Clock became a friend of human that can not be lacked since it came into being. It appears every place where human beings take activities. And microcomputer time controller is the basic electric product which appeared in modern life of human. So it has much realistic meaning for us to study, exert and expand. Its basic function is to time, to regulate time and to set clock and so on. It is a multiple-functional clock.
AT89S52 MCU(Micro Controller Unit) is the core of this design, and it realizes by controlling the clock chip DS1302. It has the fuctions of timing and so on. Besides, it's very precise. and it cannot lose its digital when it power out.This program was finished by C language, and it was compiled and simulated by KEIL software. We can ring the bell by a output show of a LCD1602,an buzzer alarm clock as normal situations situations. This program also make a design to have exchanging between human and computer by four buttons.Through these buttons, we can make settings of ringing a bell, timing, countdown function and regulating time.

Key words: time controller；clock chip；Micro Controller Unit；exchanging between human and computer

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