数字式秒表单片机数字秒表课程设计 毕业论文 .doc
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数字式秒表
系 、 部：
学生姓名：
指导教师： 职称
专 业：
班 级：
完成时间：
摘 要
本次课程设计的数字电子秒表系统采用AT89S52单片机为中心器件，利用其定时器/计数器定时和记数的原理，结合显示电路、LED数码管以及外部中断电路来设计。将软、硬件有机地结合起来，使得系统能够实现LED显示，0～99.99秒，计时精度为0.01秒，能正确地进行计时。其中软件系统采用汇编语言编写程序，包括主程序，显示程序，中断服务程序，延时程序，按键程序等，并在KEIL中调试运行，硬件系统利用PROTEUS来实现，简单且易于观察，在仿真中就可以观察到实际的工作状态。
关键词:?秒表；AT89S52；汇编语言
目 录
1 设计课题任务、功能要求说明及总体方案介绍····························1
1.1 设计课题任务···················································1
1.2 功能要求说明···················································1
1.3 设计课题总体方案介绍及工作原理说明·····························1
2 硬件系统的设计······················································3
2.1 硬件系统各模块功能简要介绍·····································3
2.2 电路原理图、PCB图、元器件布局图································5
2.3 元器件清单·····················································5
3 软件系统的设计······················································6
3.1 使用单片机资源的情况···········································6
3.2 软件系统各模块功能简要介绍·····································6
3.3 软件系统程序流程框图···········································7
3.4 软件系统程序清单··············································11
4 设计结论、仿真结果、误差分析、教学建议·····························12
4.1 设计课题的设计结论及使用说明··································12
4.2 设计课题的仿真结果············································12
4.3 设计课题的误差分析············································13
结束语································································14
参考文献······························································15
致谢··································································16
附录··································································17
附录A 电路原理图··················································17
附录B 秒表PCB图··················································18
附录C 数字秒表布局图··············································19
附录D 元件清单····················································20
附录E 软件系统程序清单·········
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