基于51单片机的电子时钟设计

摘 要：本文介绍了基于51单片机的电子时钟的设计，从硬件和软件两个方面给出了具体实现过程。该时钟的设计采用功能分块的思想方法，将硬件电路划分为开关电路，显示驱动电路和数码管电路等若干独立模块，而软件的实现则由闹钟的声音程序、时间显示程序、日期显示程序，秒表显示程序，时间调整程序、闹钟调整程序、定时调整程序，延时程序等组成。文中给出了各个模块的电路图，并用Proteus的ISIS软件对电子时钟系统的各个功能进行了仿真，并给出了相应的仿真结果图像。

关键词：单片机；电子时钟；键盘控制

Electronic Clock Design Based on 51 Single-chip

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Shandong Institute of Business and Technology , 264005

Abstract: This paper introduces the electronic clock design based on 51 single-chip microcomputer, and it provides us specific implementation process from aspects of hardware and software. This clock is designed by the method of function blocks. In hardware, it’s circuit is divided into switch block, display drive block and digital control block. However, the software consist of the program of alarm clock, time display, date display, stopwatch display, time adjust, timing adjustment, the alarm clock adjustment, time delay and so on. Circuit diagrams of each module is also given and the corresponding simulation image of this clock produced by software of Proteus is also showed in this paper.

Key words: single chip microcomputer; electronic clock; Keyboard control

一， 引言

1957年,Ventura发明了世界上第一个电子表，从而奠定了电子时钟的基础，电子时钟开始迅速发展起来。现代的电子时钟是基于单片机的一种计时工具，采用延时程序产生一定的时间中断，用于一秒的定义，通过计数方式进行满六十秒分钟进一，满六十分小时进一，满二十四小时小时清零。从而达到计时的功能，是人民日常生活补课缺少的工具。现在高精度的计时工具大多数都使用了石英晶体振荡器，由于电子钟、石英钟、石英表都采用了石英技术，因此走时精度高，