微机原理课程设计基于8086

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HEBEI UNITED UNIVERSITY

微机原理课程设计说明书

设计题目：八路竞赛抢答器

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2012年11月22日

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摘要

现在很多地方都可能会有各种智力竞赛,当遇到抢答环节时,如果要求主持人自己去用肉眼观察哪一个选手抢答的速度最快无疑会对比赛结果造成很大的影响,同时使比赛失去了公平和公正性,这时候我们想到了抢答记分器是必要设备。数字抢答器由主体电路与扩展电路组成。用我们刚刚学过的汇编语言编写程序模拟分析了竞赛中抢答系统的运用，结合竞赛的实际情况阐述了抢答系统的工作原理，给出了一种简单实用的多路抢答系统的硬件、软件电路设计方案。该系统适用于竞赛中的抢答环节。现假定竞赛中共有八名选手，主持人宣布抢答开始后，进入倒计时，倒计时间为10秒，10秒内若有选手按下抢答按钮，则倒计时结束，屏幕显示最先抢答选手的号码；若10秒内无人抢答，则该轮抢答结束。当主持人按下复位按钮时，屏幕显示清零，等待下一轮抢答。

本课题设计了一种采用8255芯片和汇编语言制作的多功能抢答器，实验箱中的开关区和数码显示区共同完成。主要功能：1.倒计时10秒 2.用LED数码管显示1-8号选手先按下键者的号码。它除了具有基本的抢答功能之外，和数显的功能，当抢答开始后，系统会自动倒计时，并且时间是可以预设的，期间有人抢答的话系统会停止计时，如果期间没人抢答，系统自动锁存直到主持人按下复位键。

Abstract

Now many places may have a variety of intellectual competition responder, when link, if ask themselves to see with the unaided eye which one contestant vies to answer first the fastest will undoubtedly have great impact on the outcome of the game, the game lost fair and justice, at that time we thought the answer scoring apparatus is necessary equipment. The figure vies for the answering device extended from the main circuit and the circuit. We have just learned with the assembly language program to simulate and analyze the race responder system used, combined with the actual situation of competition elaborated vies to answer first the working principle of the system, this paper presents a simple and practical the responder system hardware, software design. The system is applicable to contest Responder link. It is assumed that the race a total of eight players, the host announced the answer after the start, entered the countdown, countdown time of 10 seconds, 10 seconds if the contestant to answer in the button pressed, the end of the countdown, the screen display first player answer number; if nobody answer the question within 10 seconds, the wheel the answer in the end. When the host press the reset button, the screen display clear, waiting for the answer in the next round.

The task of designing a method using 8255 chip and assembly language produced by multi-functional responder, the experimental box switch region and digital display area together. Main function: 1 countdown 10 seconds 2 with LED digital tube display 1-8 player to press the number keys. It has a basic responder function, and digital display function, when the answer after the start, the system will automatically countdown, and the time can be preset, during the answer words system will stop the clock period, if no answer, the system automatically latched until the host press the reset button.