单片机电子钟设计报告 大学毕设论文.doc

摘要 20世纪末,电子技术获得了飞速的发展,在其推动下,现代电子产品几乎渗透了社会的各个领域,有力地推动了社会生产力的发展和社会信息化程度的提高,同时也使现代电子产品性能进一步提高,产品更新换代的节奏也越来越快。数字钟已成为人们日常生活中必不可少的必需品,广泛用于个人家庭以及办公室等公共场所,给人们的生活、学****工作、娱乐带来极大的方便。由于数字集成电路技术的发展和采用了先进的石英技术,使数字钟具有走时准确、性能稳定、携带方便等优点,它还用于计时、自动报时及自动控制等各个领域。尽管目前市场上已有现成的数字钟集成电路芯片出售,价格便宜、使用也方便,但鉴于数字钟电路的基本组成包含了数字电路的主要组成部分,因此进行数字钟的设计是必要的,研究数字钟及扩大其应用,有着非常现实的意义。单片机数字时钟就是其中的一款设计。它具有编程灵活,便于电子钟功能的扩充,即可用该电子钟发出各种控制信号,精确度高等特点,同时可以用该电子钟发出各种控制信号。单片机数字钟是单片机为核心。时钟,本设计是以单片机AT89S52 配备 LED 数码显示管,数字钟采用 24小时制方式显示时间,带有年月日、秒表和闹钟功能。本设计打算采用蜂鸣器做提醒,因没有蜂鸣器所以采用闪灯来提醒。使人不仅仅是通过视觉来感受单片机数字钟带来的方便。关键词: 单片机数字时钟汇编 1 目录第一章系统设计要求································································ 2 设计要求········································································· 2 第二章系统的组成及工作原理···················································· 3 系统的组成····································································· 3 系统的工作原理······························································· 3 第三章系统硬件电路方案设计···················································· 6 电子时钟方案·································································· 6 数码显示方案·································································· 6 ·································································· 7 晶体振荡电路·························································· 7 复位电路································································ 7 显示电路································································ 7 键盘电路································································ 7 控制电路································································ 8 第四章系统的软件设计····························································· 9 程序流程图····································································· 9 源程序··········································································· 10 第五章系统调试和测试结果与分析··············································· 25 实验仪器与工具········································