四路抢答器设计说明

EDA课程设计报告

题目：四路抢答器

学院：机械与电气工程学院

专业：电气工程及其自动化

班级：

：

学号：

指导教

师：

教师职

称：

2018 年 1 月 5 日

机械与电气工程学院EDA课程设计任务书

专业：电气工程及其自动化年级：B电气工程15-2 ：路志文学号：1504215127

目录

四路抢答器 (1)

摘要 (1)

Abstract (2)

1 设计目的 (3)

2 设计要求 (3)

3设计任务 (3)

4设计方案 (3)

4.1硬件设计 (3)

4.1.1四路抢答器按键控制电路 (3)

4.1.2数码管显示电路 (4)

4.1.3外部时钟脉冲电源电路 (4)

4.1.4四位电路抢答器 (5)

4.1.5PCB设计 (6)

4.2软件设计 (6)

4.2.1软件仿真 (6)

4.2.1.1单片机外部脉冲电路 (7)

4.2.1.2选手抢答开关电路 (7)

4.2.1.3数码管电路 (8)

4.2.1.4加法记分电路 (8)

4.2.1.5减法记分电路 (9)

4.2.1.6延时报警电路 (9)

4.2.2软件程序设计 (10)

4.2.2.1选手抢答按键程序设计 (10)

4.2.2.2按键加减法记分器程序设计 (10)

4.2.2.3延时程序设计 (11)

4.2.2.4清零程序设计 (11)

4.2.2.5数码管设计 (12)

4.2.2.6定时器程序设计 (12)

总结 (13)

参考文献 (14)

附录 (15)

四路抢答器

路志文

摘要

随着我国经济和文化事业的发展有很多竞争场合需要有快速公正的抢答器.

该课题设计的是一款多功能四路数字抢答器,它具有优先抢答、限时抢答、铃音提示、数字显示、系统报警等功能。主要由抢答电路、定时电路、报警电路、时序电路组成。其中抢答电路主要是分辨出选手的按键顺序,锁存优先抢答者的编号,供译码显示电路使用,并封锁输入电路,禁止其他选手抢答；定时电路主要是限定抢答时间,禁止选手超时抢答,抢答有效时间可以由问题的难易来设定。确保了比赛的公平性,更便于选手操作,实现快速无误的抢答。

关键词：四路抢答器计时报警

four-waybuzzer

luzhiwen

Abstract

Has the very many competition situation along with our country economy and the cultural establishment development to need to have fast fair vies to answer first.

Soldier electron vies to answer first, it has first vies to answer first, reprimands the by-pass, the time limit vies to answer first, the bell sound prompt, the numeral demonstrated, the system reports to the police and so on the functions. Mainly by vies to answer first the electric circuit, the timing circuit, the alarm circuit, the sequence circuit composes. In which vies to answer first the electric circuit mainly is distinguishes contestant's pressed key order, the lock saves first the viing to answer first serial number, for the decoding display circuit use, and blocks the input circuit, forbids other contestants to vie to answer first; The timing circuit mainly is the definition vies to answer first the time, forbids the contestant overtime to vie to answer first, vies to answer first the working life to be possible to establish by the question difficulty. Has guaranteed the competition fairness, is advantageous for the contestant to operate, realization fast unmistakable viing to answer first.

This design electric circuit mainly used first the encoder, the latch, electronic primary devices and so on 555 timers.

Keywords:four-way buzzer timing call the police