毕业论文--基于单片机的数字电子秒表的设计与实现_精品.doc

毕业论文--基于单片机的数字电子秒表的设计与实现 摘 要 近年来随着科技的飞速发展单片机的应用正在不断的走向深入本文阐述了基于单片机的数字电子秒表设计本设计主要特点是计时精度达到001s解决了传统的由于计时精度不够造成的误差和不公平性是各种体育竞赛的必备设备之一 本设计的数字电子秒表系统采用8051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计时器将软硬件有机地结合起来使得系统能够实现五位LED显示显示时间为0～com能正确地进行计时同时能记录一次时间并在下一次计时后对上一次计时时间进行查询其中软件系统采用汇编语言编写程序包括显示程序定时中断服务外部中断服务程序延时程序等并在WAVE中调试运行硬件系统利用PROTEUS强大的功能来实现简单切易于观察在仿真中就可以观察到实际的工作状态 关键字单片机数字电子秒表仿真 Abstract With the rapid development of science and technology in recent years SCM applications are constant-depth manner In this paper based on single chip design of digital electronic stopwatch The main characteristics of this design timing accuracy of 001s to solve the traditional result of a lack accuracy due to timing errors and unfair and is a variety of sports competitions one of the essential equipment In addition the hardware part of the set View button on the stopwatch can be the last time to save time for user queries The design of the multi-function stopwatch system uses STC89C52 microcontroller as the central device and use its timer counter timing and the count principles combined with display circuit LED digital tube as well as the external interrupt circuit to design a timer The software and hardware together organically allowing the system to achieve two LED display shows the time from 0 to 9999 seconds Timing accuracy of 001 seconds Be able to correctly time at the same time to record a time and the next time after the last time the time to search automatically added a second in which software systems using assembly language programming including the display program timing interrupt service external interrupt service routine delay procedures key consumer shaking procedures and WAVE in the commissioning operation hardware system uses to achieve PROTEUS powerful simple and easy to observe the cut in the simulation can be observed on the actual working condition KeywordLED displayHigh-precision stopwatch8051目 录 摘 要 I Abstract II 绪 论