数字钟的制作与设计

文档编号:JD1198  文档字数:10128

摘  要
 数字钟是采用数字电路实现对时、分、秒进行数字显示的计时装置， 它是以不同的计数器为基本单元构成的，用途十分广泛，只要有计时、计数的存在，便要用到数字钟的原理及结构；同时在日常生化中，它以其小巧，价格低廉，走时精度高，使用方便，功能多，便于集成化而受广大消费者的喜爱。广泛用于个人家庭，车站， 码头办公室等公共场所，成为人们日常生活中不可少的必需品。由于数字集成电路的发展和石英晶体振荡器的广泛应用，使得数字钟的精度，运运超过老式钟表。钟表的数字化给人们生产生活带来了极大的方便而且大大地扩展了钟表原先的报时功能。因此，研究数字钟及扩大其应用，有着非常现实的意义。同时，由于其原理简单，非常适合初学者进行设计学习。
 本系统的设计思想主要为实现一机多用，充分扩展以实现在生活更广泛的应用。对于测温系统，设计要求温度测量误差<=0.5℃；时钟电路要求实现年月日时分秒的显示功能，并能通过键盘对两部分功能进行切换。
关键词：智能温度测量；时钟芯片；电子日历；LED； 计时

ABSTRACT
 Digital clock is used for digital circuit, minute and second figures show that for a time device, which is different from counter to the basic unit of composition, a wide range of uses, as long as there is time, the count there, it will take 10 minutes to figure The principle and structure; at the same time in the day-to-day biochemical, with its small, low-cost, travel time and high precision, easy to use, features, ease of integration by which consumers love. Widely used in personal family, the station, the Office of the terminals and other public places, it has become essential for daily life necessities. Due to the development of digital integrated circuits and quartz crystal oscillators widely used, making digital clock precision, Yun Yun watches over the old. The digital clocks to the production of people living brought great convenience but also greatly expands the original time clock function. As a result, digital clock and the expansion of its application, has a very real sense. At the same time, due to its principle of simple design is ideal for beginners to learn.
 The design thought of this system mainly in order to carry out a machine to use much, make use of a MCU to expand well, ascend with the solid modern living more widely the application of the field.
 The error of the temperature measure system is small in <=0.5 ℃; the digital clock electric circuit requests to carry out the display for year, mouth ,day,hour,minute,second.And through the keyboard to carry on cut over to two part of functions.

Key Words：Intelligence temperature measure；the real time clock ；electric calendar；LED；Time

 目  录
第一章 绪论
1．1课题的提出 1
1．2 研究目的和意义 1
1．3主要研究内容 2
第二章 总体方案设计 4
2．1整体方案设计 4
2．2方案论述 5
2．3硬件系统设计 5
2．4总体软件设计 6
第三章 硬件设计 7
3．1时钟电路的设计 7
3．2接口电路逻辑图 9
3．3 显示模块的选择 11
第四章 软件设计 13
4．1 总体程序流程框图 13
4．2 开发流程 15
4．2．1初始化子程序 15
4．2．2显示子程序 15
4．2．3闹钟告警处理 17
4．2．4查询1ms的变化子程序 17
4．2．5ＡＤ采集和ＡＤ数据处理流程 20
4．2．6键盘扫描程序 22
4．2．7按键处理子程序 23
第五章 测试结果及分析 26
第六章 结论 26
第七章 设计体会 28
参考文献 29
致 谢 30

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