毕业论文-单片机答辩计时器.doc

[摘要] 世界上最快而又最慢，最长而又最短，最平凡而又最珍贵，最容易被人忽视，而又最令人后悔的就是时间，随着科技的高速发展，人们的时间观念也是越来越强，在一些特殊的场合时间概念更是是尤显突出，比如会议、辩论赛、篮球赛等，因此钟表成了人们生活的必需品。并且随着时间的发展，科学技术水平也是日新月异，单片机技术作为其中的佼佼者更是应用甚广，单片机全名单片微型计算机，是典型的嵌入式微控制器，它诞生于1971年，经历了SCM、MCU、SoC三大阶段，并且发展良好，单片机的技术进步反映在内部结构、功率消耗、外部电压等级以及制造工艺上。单片机具有体积小、功耗低、控制功能强、扩展灵活、微型化和使用方便等优点,渗透到我们生活的各个领域，所以本文便是是介绍了基于单片机技术的带时钟和万年历功能的答辩计时器的制作原理和制作过程，其中主要采用了AT89C51单片机、74HC573驱动芯片、LCD1602显示器、DS1302等芯片。它主要实现了正确显示时间，闹铃和倒计时到点报警的功能。 [关键词] 时间，单片机，答辩计时器，万年历 Abstract: The worlds fastest and most slowly, but the longest shortest, the most extraordinary and most precious, the most easily overlooked, yet most regret is the time.With the rapid development of science and technology，Peoples sense of time is getting stronger.In some special occasions concept of time is particularly prominent and more important.Such as conferences, debates tournament, basketball, etc.Therefore watches have become a necessity of life.And over time, the development of scientific and technological level is changing.SCM technology as one of the best is the wide application，Full list microcontroller chip microcomputers, is a typical embedded microcontroller，It was born in 1971, has experienced SCM, MCU, SoC three stages, and the development of good, the microcontroller technical progress reflected in the internal structure, power consumption, external voltage level and workmanship.Microcontrollers with small size, low power consumption, control functions, expansion flexibility, miniaturization and ease of use, penetrate into all areas of our lives, so this article is to introduce chip-based technology with clock and calendar functions respondent timer making principles and production process，The main uses AT89C51 microcontroller, 74HC573 driver chip, LCD1602 display, DS1302 and other chips. It is mainly to achieve the correct display time, alarm and countdown point alarm function. Key words: Time，SCM，Respondent timer，Calendar 目 录 1 1.1 研究背景 1 1.2 设计目的及系统功能 1 2 系统硬件设计 2 2.1 整体设计框图 2 2.2 单片机