基于单片机的抢答器设计详解.doc

摘 要 此次设计提出了用AT89C51单片机为核心控制元件,设计一个简易的抢答器， 本方案以AT89C51单片机作为主控核心，与MAX232、发光二极管、数码管、蜂鸣器等构成四路抢答器，利用了单片机的延时电路、按键复位电路、时钟电路、定时/中断等电路，设计的抢答器具有实时显示抢答选手的号码和抢答时间的特点，还有复位电路，使其再开始新的一轮的答题和比赛，同时还利用C语言编程，使其实现一些基本的功能。本设计的系统实用性强、判断精确、操作简单、扩展功能强。它的功能实现是比赛开始，主持人读完题之后按下总开关，即计时开始，此时数码管开始进行1s的加计时，直到有一个选手抢答时，对应的会在数码管上显示出该选手的编号和抢答所用的时间，同时该选手对应的发光二极管会发出相应的光，蜂鸣器也会发出声音，以提示有人抢答本题，如果在规定的60s时间内没有做出抢答，则此题作废，即开始重新一轮的抢答。STC89C52单片机动态显示中断按键控制Abstract This design use AT89C51 as the core control element is presented to design a simple responder, this scheme is AT89C51 single chip microcomputer as control core, and MAX232 led digital tube buzzer buzzer constitute four road, such as using the time delay of the single chip microcomputer circuit button reset circuit clock timing/interrupt circuit, design of vies to answer first instruments have a real-time display vies to answer first contestants number and the characteristics of vies to answer first time, and reset circuit, to start a new round of the answer and, at the same time also use of C language programming, make it implements some basic functionality This design the system of practical judgment accurate operation simple extension function of the realization of the function of the stronger it is the match began, and the host to read the topic after press the main switch, the timer starts and the digital tube to 1 s of time, until there is a contestant vies to answer first, the corresponding will be displayed on the digital tube out of the contestants serial number and vies to answer first the time, the player at the same time the corresponding leds emit light, buzzer will sound, ontology to remind someone vies to answer first, if within the time stipulated in the 60 s made no vies to answer first, then this topic invalid, is beginning to round of vies to answer first Keywords: Dynamic display of STC89C52 single chip interrupt, button control目 录 第一章 绪论 1 第一节 单片机抢答器的背景 1 第二节 单片机抢答器的意义 1 第三节 抢答器的应用 2 第二章 整体设计方案 3 第一节 单片机的选择 3 第二节 单片机的基本结构 6 第三章