单片机数字时钟课程设计报告

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1、单片机数字时钟设计目录1.引言··························································22.关键词························································23.内容摘要······················································24.设计内容······················································24

2、.1任务书······················································24.2设计思路电路原理框图········································34.3软件设计方面················································44.4硬件设计方面················································4225主要元器件的概述··················

3、····························46.仿真实现·····················································76.1引脚连接（电路连接图）···································76.2仿真结果（电路原理图）···································86.3PCB图··················································96.4实验操作·····

4、···········································97.元件清单·····················································108.程序附录·····················································13总结··························································20参考文献···························

5、···························2022【引言】高精度的计时工具大多数都使用了石英晶体振荡器，由于电子钟、石英表、石英钟都采用了石英技术，因此走时精度高、稳定性好、使用方便、不需要经常调校。数字电子时钟，自从它发明的那天起，就成为人类的朋友，是人们日常生活中必不可少的必需品，广泛用于个人家庭以及车站、航站、剧院、办公室等公共场所，给人们的生活、学习、工作、娱乐带来极大的方便。但随着时间的推移，科学技术的不断发展，生活节奏越来越快，竞争日益激烈，人们对时间计量的精度要求越来越高，应用越来越广。

6、【内容摘要】本实验采用LCD液晶屏作为显示系统，以STC89C51单片机为核心，由液晶显示屏，键盘，电容电阻，晶振等元器件组成。所组成的模块能够实验时，分，秒的数据显示，通过程序设计运用四个按键SB0，SB1，SB2，SB3能够实现对数字时钟时间的设置和调整。本实验将写好的软件烧录到单片机中，通过单片机来实现，是实验的电路图更加简单明了，系统稳定性大大提高。【关键词】单片机，数字时钟，中断，定时，汇编任务书设计题目：单片机数字时钟设计主要内容与目标：1：通过单片机内定时器控制走时，准确持续走时，调时不影响走时；2

7、：在LCD上显示时，分，秒；3：通过五个按键能够对时间进行设定和调整。具有的设计基本条件：1：PC机一台；2：STC89C51单片机一块；3：KeilC调试环境、Proteus仿真软件，Protel画图软件。计划设计进程：1：明确课题对程序功能，运算精度等方面的要求及硬件条件2：把复杂问题分解为若干模块，确定各模块处理方法，画出流程图。3：编制程序，根据流程图精心选择合适的指令和寻址方式来编制源程序4：对程序进行汇编，调试和修改，直到程序运行结果正确为止。225：购买器材，连接、制作硬件；6：将软件功能在硬件上得

8、到实现，做出数字钟实物。设计思路电路原理框图：初始化LCD显示赋值时钟芯片赋初值是定闹钟程序取时钟否送显示键按下.软件设计方面:1：采用模块化程序结构设计软件，首先将整个软件分成若干功能模块；222：根据设计原理图编写程序；3：通过keil软件编写调试程序；4：与硬件一起联调，最后完成全部调试工作。硬件设计方面：1：将整个硬件系统划分为若干单元电路，绘出整个逻辑电路，注明