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吉林建筑工程学院
电气与电子信息工程学院
《单片机原理及应用》课程设计报告
设计题目： 电子计时器综合系统设计
专业班级： 电子信息科学与技术092 学生姓名： 学 号：
指导教师：
设计时间： 2012.8.27－2012.9.7
教师评语： 成绩 评阅教师 日期
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目录
第1章 绪论························································1 1．1 课程设计目的···············································1
1.2 课程设计内容···············································1 1.3 课程设计要求···············································1 1.4 电子时钟的简单介绍·········································1 第2章 控制系统的硬件设计·········································4
2.1 单片机型号的选择···········································2 2.2 89C51单片机介绍············································2 2.3 振荡电路···················································4 2.4 复位电路···················································4 2.5 键盘电路···················································4 2.6 数码管显示工作原理·········································5 2.7 整个电路原理图·············································5 第3章 控制系统的软件设计··········································6
3.1 程序流程图·················································6 3.2 程序设计···················································7 第4章 软件仿真···················································8 4.1 Proteus软件介绍············································8 4.2 仿真结果···················································8 第5章 心得体会·················································10 参考文献···························································11 附录······························································12
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第1章 绪论
1.1 课程设计目的：
通过《单片机原理与应用》课程设计，掌握单片机及其扩展系统设计的方法和设计原则及相应的硬件调试的方法。进一步加深单片机及其扩展系统设计和应用的理解。
1.2 课程设计内容：
电子计时器综合系统设计
①有6位数码管显示，能按照分秒进制显示时间； ② 能正确手动复位； ③有上电指示灯；
1.3 课程设计要求：
1）独立设计原理图及相应的硬件电路。
2）针对选择的设计题目，设计系统软件。软件要做到：操作方便，实用性强，稳定可靠。
3）设计说明书格式规范，层次合理，重点突出。并附上设计原理图及相应的源程序。
1.4 电子计时器的简单介绍
该电子计时器由AT89C51，BUTTON，八段数码管等构成，采用晶振电路作为驱动电路，有延时程序和循环程序产生的一秒定时，达到时分秒的计时，六十秒为一分钟，六十分钟为一小时，满二十四小时为一天。有两个按键分别控制小时和分钟，当按下控制分钟的按键时，分钟加一，同理按控制小时的按键时，小时加一。