南京理工大学毕业设计说明书(论文)作者:学号：教学点:专业:题目:指导者：评阅者：年月南京理工大学毕业设计（论文）评语学生姓名：班级、学号：题目：综合成绩：指导者评语：指导者(签字)：年月日毕业设计（论文）评语评阅者评语：评阅者(签字)：年月日答辩委员会（小组）评语：答辩委员会（小组）负责人(签字)：年月日毕业设计说明书（论文）中文摘要当今信息科技高速发展，使用方便、低成本电子设备已逐步成为我们日常生活中电子产品的主力军。用软件代替硬件的电子设备能大大地节省成本，且有利于资源的节约，因此，以软代硬的设计必将成为我们现代设计的主流。本设计是利用MCS-51系列单片机内部的定时器/计数器进行中数年定时，配合软件延时实现时、分、秒的计时。该方案节省硬件成本，且能够使设计者在定时/计数器的使用中及程序设计方面得到锻炼和提高，因此本系统将采用软件方法实现计时。关键词单片机计数器软件毕业设计说明书（论文）外文摘要TitleClockdesignAbstractToday'sinformationtechnologyrapiddevelopment,useconvenient,lowcostelectronicequipmenthasgraduallybecomeourdailylifethemainstayofelectronicproducts.Usesoftwareinsteadofhardwareelectronicequipment,andcangreatlysavingcostforresources,therefore,tosavesoftandharddesignwillbecomeourmoderndesignmainstream.ThisdesignisusingMCS-51seriesmicrocontrollertimer/counterinsideofseveralyearswithsoftwaredelayrealizationtiming,whenthetiming,minutesandseconds.Theschemetosavehardwarecosts,andenabledesignersintiming/counteruseandprogramminggetexerciseandimproved,thereforethissystemwillusethesoftwaremethodrealizingthetimer.Keywordsmicrocontrollercountersoftware目次1绪论...................................................................11.1数字时钟的发展史..................................................11.2设计的目的与意义..................................................11.3设计的基本思路与主要内容..........................................12简易数字时钟系统的整体设计..............................................32.1系统功能要求......................................................32.2整体方案..........................................................33硬件设计与分析..........................................................53.1硬件设计原理......................................................53.2AT89C51单片机介绍................................................53.3单片机最小应用系统................................................53.4显示电路..........................................................63.5键盘及其接口......................................................83.6系统原理图........................................................94软件设计...............................................................114.1主程序的设计.....................................................114.2键输入程序.......................................................114.4延时程序.........................................................144.5中断程序.........................................................145调试与运行.............................................................185.1电路仿真.........................................................185.2调试和运行.......................................................18结论....................................................................20致谢....................................................................21参考文献.................................................................22附录一系统原理图......................................................24附录二组件...
