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实习（设计）报告
姓 名：王星辰
班 级：10电81
学 号实习（设计）科目：单片机
实习（设计）地点：12#405A
实习（设计）时间：2013.01.07——2013.01.22
电气工程及自动化学院
School of Electrical Engineering Automation
基于单片机数字时钟的设计
摘要：
本文介绍了简单数字时钟的系统设计。系统具有时间设置及显示功能，时间为24小时制，也可以自由编写程序进行改写为12小时制。系统以STC89C52为核心，主要进行基于STC89C52简单数字时钟及其系统的研究，为初学者学习的典型例子。系统带有数码管显示，该数码管显示由两片四位数码管构成，配合按键提供的简单操作，可以进行调时、设置时间。系统软件设计包括单片机编程。单片机软件编程主要实现按键、数码管显示、时间处理、按键处理等模块功能。
关键词：数字时钟、单片机、74HC573、73HC138、共阴数码管
目录
1、引言···························································3
1.1课程设计要求·················································4
1.2课程设计目的·················································4
2、单片机发展历史···············································5
2.1三大阶段······················································5
2.2单片机发展趋势················································6
3、单片机的应用··················································8
3.1单片机的应用分类··············································8
4、数字时钟的构成················································9
4.1数字时钟的构成················································9
4.2方案选择与相关技术············································9
4.3 STC89C52·····················································9
4.4 74HC573·····················································15
4.4 74HC138·····················································16
4.5 LED模块的原理及应用········································17
5、电路设计·····················································18
5.1 Proteus仿真··················································18
5.2系统软件设计·················································18
5.3系统硬件设计·················································18
5.4成品图片·····················································19
5.4 编程思路····················································20
总结······························································21
参考文献·························································22
附录······························································23
致谢····················
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