田源单片机的电子闹钟设计.docVIP

空军工程大学 本科毕业论文（设计） 题目 数据采集系统中的海量存储 院 （系） 工程学院 专 业 计算机科学技术与应用 年 级 2004 级 肖强 学 号 048T30219 指导教师 景小宁 二00 八 年 六 月 摘 要 单片机自20世纪70年代问世以来，以其极高的性能价格比，受到人们的重视和关注，应用很广、发展很快。而51单片机是各单片机中最为典型和最有代表性的一种。 本设计以AT89S51芯片为核心，辅以必要的外围电路，设计了一个的电子时钟，它由5V直流电源供电。在硬件方面，除了CPU外，使用个七段LED数码管来进行显示，LED采用的是动态扫描显示，使用74LS14芯片进行驱动。通过LED能够比较准确显示时、分。两个简单的按键实现对时间的调整。软件方面采用汇编语言编程。整个电子钟系统能完成时间的显示调时定时闹钟复位等功能。 AT89S51，液晶驱动，电子闹钟 ABSTRACT Because of its extremely high performance-price ratio, the single-chip computer (SCC) has been paid great attention to ever since it came out in 1970s of 20th Century, and has gained an extensive applicable field and fast development. Among all kinds of SCCs, 51 SCC is the most typical and representative one. This design, adopting AT89S51 chip as the core part with some necessary peripheral circuits, is a simple electronic clock which uses 5V DC as the power supply. In hardware aspect, besides the CPU, six seven-segment LED digi-tubes are used for display, which work in a dynamically scanning display mode and driven by 74SL14 chip. The LEDs can accurately indicate hour and minute and two buttons can be used to adjust the time. While in the software aspect, the programming language is assembly language. The whole electronic clock system has functions of time display, adjustment, bell-setting and reset, etc. Choose the smallest SCM system applications,add Comparison procedures, time to adjust procedures and faint buzzing procedures, Through relatively faint buzzing trigger procedures to achieve alarm clock function, Completed the design needs of the software environment. Keil introduced and the use of SCM software simulation debugging, testing the feasibility. Keywords: technology of the one-chip computer，AT89S51，the liquid crystal is driven，Electronic alarm clock  目 录 第1章 绪 论 1 1.1 单片机简介 1 1.2 电子闹钟的重要意义 1 1.3 本文的主要工作 2 第2章AT89S51单片机的硬件系统 3 2.1 AT89S51单片机的特性 3 2.2 AT89S51 单片机的封装 3 2.3 存储空间 3 2.3.