基于AT89C52的万年历电子时钟的设计-毕业设计及基于AT89S52单片机的光电计数器设计.doc

摘 要

单片机应用技术飞速发展，纵观我们现在生活的各个领域，从导弹的导航装置，到飞机上各种

仪表的控制，从计算机的网络通讯与数据传输，到工业自动化过程的实时控制和数据处理，以及我

们生活中广泛使用的各种智能IC卡等，这些都离不开单片机。单片机是集CPU ,RAM ,ROM ,定时，

计数和多种接口于一体的微控制器。它体积小，成本低，功能强，广泛应用于智能产业和工业自动

化上。而51系列单片机是各单片机中最为典型和最有代表性的一种。这次毕业设计通过对它的学习

，应用，从而达到学习、设计、开发软、硬的能力。

本文以单片机为核心，采用串行时钟芯片DS1302。过去多用并行接口的时钟芯片，如

MC146818、DS12887 等。它们已能完全满足单片机系统对实时时钟的要求，但是这些芯片与单片

Abstract

SCM rapid development of applied technology, we now live Looking at the various fields, from the missile's

navigation devices, to the various instruments on the aircraft control, computer network communications and data

transmission, industrial automation to the process of real-time control and data Processing, and we live in the

extensive use of the smart IC cards, these are inseparable from the SCM. SCM is set CPU, RAM, ROM, timing,

counting on one interface and a variety of microcontrollers. Its small size, low cost, feature strong, smart widely

used in industry and industrial automation. And 51 of the SCM SCM is the most typical and most representative

one. The graduation project through its study, and thereby to study, design, develop software and hardware

capabilities.

Based on SCM as the core, a serial clock chip DS1302. Past the use of parallel interface chip's clock, such as

main controller AT89C52, clock circuit DS1302, show circuit, the circuit keys, and reset circuit, and other

components, to achieve the clock showed that the calendar function, capable of year, month, day, hour, minute

and weeks of shows.

Key Words：AT89C52 Chip DS1302 Chip Keil C language software LED dynamic display;

目录

摘 要...........................................................................................................................1

Abstract .......................................................................................................................2

目 录 ........................................................................................................................3

第 1 章 引 言....................................................................................................3

1.1 设计目的 ......................................................................................................................3

2.1.3 AT89C52 芯片简介...................................................................................7

2.1.4 DS1302 芯片简介......................................................................................7

2.2 系统硬件电路的设计 .............................................................................................10

2.2.1 单片机主控制模块的设计 ...................................................................10

2.2.2 时钟电路模块的设计 ............................................................................10

2.2.3 显示模块的设计 .....................................................................................10

2.3 系统软件流程...........................................................................................................12

2.4 实验源程序 ...............................................................................................................14

2.4.1 DS1302 驱动程序....................................................................................14

结 论..................................................................................................................20

(4)熟悉 Keil 软件的使用方法;

本设计实现一个日历时钟显示系统。首先介绍系统硬件工作原理，并附以系统结构框