中文题目：基于单片机的多功能时钟设计
外文题目: THE DESIGN OF MULTIFUNCTIONAL CLOCK BASED ON
SINGLE-CHIP
毕业设计（论文）共 62 页（其中：外文文献及译文完成日期 2013年06月 20页） 图纸共0张答辩日期 2013年06月
辽宁工程技术大学
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辽宁工程技术大学
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摘要
多功能时钟广泛应用于个人家庭，车站，码头，办公室等公共场所，成为人们日常生活中不可少的必需品。单片机模块中最常见的是数字钟，数字钟是一种用数字电路技术实现时、分、秒计时的装置。由于数字集成电路的发展和石英晶体振荡器的广泛应用，使得与机械式时钟相比具有更高的准时性和直观性，且无机械装置，具有更长的使用寿命。钟表的数字化给人们生产生活带来了极大地方便，而且大大地扩展了钟表原先的报时功能。因此，研究数字钟及扩大其应用，有着非常现实的意义。
数字钟在日常生活中最常见，应用也最广泛。本文以AT89S52芯片为核心，辅以必要的外围电路和温度传感器，设计一简易的多功能电子时钟系统。设计中以DS1302为时钟芯片，DS18B20为温度传感器，通过液晶显示器LCD1602实时显示时间及温度，通过按键设置年月日和星期以及定时闹钟，定时闹钟时间到自动发出警报。数字钟采用24小时制方式显示时间。文章的核心主要从硬件设计和软件编程两个大的方面。 关键词：时钟；单片机；LCD液晶显示
I
Abstract
Multifunctional clock is widely used in personal family, station, wharf, office and other public places, it becomes necessary things in people daily life.Digital clock is the most common application in the module of single-chip.A digital clock is a kind of digital circuit technology implementation, minutes and seconds timing device.As the development of digital integrated circuits and quartz crystal oscillator is widely used, so compared with the mechanical clock has higher quality on time and intuitive, and without a mechanical device,and having a longer life. The digital clock brought the greatly convenient to people production the life , and greatly expanded the clocks chime of the original function.Therefore, the digital clock and expand its application, has a very realistic significance.
Digital clock in our daily lives is the most common, is the most widely applied.The main section is designed digital bell to single-chip AT89C51 core, with LCD modules, clock chips, and other functional modules. In this paper, DS1302 chip is used as the clock chip, DS18B20 chip is used as the temperature sensor and LCD1602 was used to display time and temperature.You can set year, month and time alarm clock through the four buttons.When the real time reach to the time clock，the system will warn automatically.24 hours using digital bell system display time.The article primarily from the core hardware design and software programming two major aspects.
Keywords: clock; single-chip;LCD display
II
目录
引言 ........................................................................................................................... 1 1 时钟的背景知识 ................................................................................................. 3 1.1 时钟的研究背景 ........................................................................................... 3 1.2 国内外时钟的研究现状 ............................................................................... 4 2 总体设计方案 ..................................................................................................... 6 2.1 多功能时钟的工作原理 ............................................................................... 6 2.2 多功能时钟的总体结构 ............................................................................... 6 3 系统硬件设计 ..................................................................................................... 8 3.1 硬件介绍 ....................................................................................................... 8 3.1.1 单片机AT89C51 ....................................................................................... 8 3.1.2 时钟芯片DS1302 ................................................................................... 10 3.1.3 温度传感器DS18B20 ............................................................................. 11 3.1.4 液晶显示屏LCD1602 ............................................................................. 14 3.2 系统硬件构架 ............................................................................................. 17 3.2.1 AT89C51单片机最小系统 ..................................................................... 17 3.2.2 温度测量模块 ........................................................................................ 18 3.2.3 时钟模块 ................................................................................................ 18 3.2.4 电源模块 ................................................................................................ 19 3.2.5 LCD液晶显示模块 ................................................................................. 20 3.2.6 蜂鸣器模块 ............................................................................................ 21