数字电子钟的设计与实现毕业论文.doc

摘要
时间对人们生活和生产有着重要的意义。因此,如何精确的知道、计算时间就成了从古至今人们一直在努力的方向。传统机械钟主要使用机械齿轮传动,由于机械磨损、老化以及制造工艺等原因导致使用寿命有限,并且误差较大。电子钟,也称为数字显示钟,是一种利用数字电路来显示秒、分、时的计时装置,与传统的机械钟相比,它具有走时准确、显示直观、无机械传动装置等优点,且因非机械驱动,因而具有更长的使用寿命,相较石英钟的石英机芯驱动,更具准确性,现已成在人们日常生产生活中的必需品,在家庭、办公室、码头、剧院以及车站等场所被广泛应用。
本文的主要内容是基于AT89C51单片机设计实现数字电子钟。在深入地学习和理解了C51系列单片机的相关知识绘制电路图后,应用汇编语言编程实现预期的实验目的。以AT89C51单片机作为整个系统的控制核心,简化了系统的结构和生产成本,模块化的设计便于及时的修改和调试系统,并重视实用性和个人不同的喜好。这个数字电子钟及拥有基本电子钟的计时功能,有可以实现闹铃和秒表功能的扩展。它的体积小,功能多,省电节源,有很广泛的适用范围。使用动态显示方式将数码管的管脚串联起来,与一般静态显示方式不同,减少连接,节约成本。分软硬件细致地介绍了本实验各部分的设计思路以及具体的实现步骤。采用模块设计的思想,在设计时分为一个个小的功能模块,便于调整和修改。
本论文的目的是了解数字电子钟的工作原理,并在设计和调试的过程中学习发现中小规模集成电路在实际应用与理论学习的不同之处,掌握基于单片机的中小规模集成电路的开发流程及要注意的方面。
关键字:AT89C51 数字电子钟单片机
Abstract
The time to the people life and production has important significance. Therefore, how to know precisely, putation time as since ancient times people have been efforts direction. The traditional mechanical clock mainly uses the mechanical gear drive, due to mechanical wear, aging and manufacturing process causes the lifetime is limited, and a larger error. Electronic bell, also known as the digital display clock, is a digital circuit to display the seconds and minutes, when the timing device, and the traditional mechanical clocks, it has the accurate time, intuitive display, no mechanical transmission etc, and because of a mechanical drive, and therefore has a longer service life, compared with the quartz clock quartz movement driving, more accuracy, has called in the people daily life essential necessities, in family, office, dock, theatre and railway stations and other places widely used.
The main content of this paper is based on the AT89C51single-chip design of digital electronic clock. In depth study and understanding of the C51Series MCU related knowledge to draw a circuit diagram, the application of assembly language programming to achieve the desired objective. With AT89C51 MCU as the control core of the system, simplifying the structure of system and the cost of produc