8路智能抢答器毕业设计.doc

8路智能抢答器毕业设计


摘  要

随着电子技术的飞速发展，基于单片机的控制系统已广泛运用于各个行业。在智能化的今天，单片机系统已经代替了传统的控制系统的常规电子路线。
电子只能抢答器在抢答过程中，为了知道哪一组或哪一位选手先答题，必须要设计一个系统来完成这个任务。本系统采用AT89S51单片机作为核心。控制系统的四个模块分别为：单片机最小系统、显示模块、显示驱动模块、抢答开关模块。

关键词：单片机；显示；驱动；抢答

Abstract

Along with the rapid development of electronic technology, based on single-chip microcomputer control system has been widely used in various industries. The intelligent today, SCM system has replaced the traditional control system of conventional electronic route.
Electronic only in vies to answer first process vies to answer first, in order to know what a group or a player to answer, must design a system to complete this task. This system USES AT89S51 as the core. Control system of four modules: SCM system, display module, the smallest display driver module, vies to answer first switch module.

Keywords: SCM, Display, Drive, Vies to answer first

目    录
引言   ………………………………………………………………………………………1
1.系统设计点 ……………………………………………………………………………1
2.抢答器的硬件设计……………………………………………………………………1
2.1设计思路…………………………………………………………………………………1
2.2硬件设计…………………………………………………………………………………3
2.3单片机芯片的选择………………………………………………………………………3
2.3模块性能分析……………………………………………………………………………5
2.4独立式键盘………………………………………………………………………………5
2.5 LED数码管显示…………………………………………………………………………5
2.6最小系统图………………………………………………………………………………6
2.7时序控制电路……………………………………………………………………………7
2.8第一有效抢答信号的处理………………………………………………………………7
2.9倒计时的处理……………………………………………………………………………7
3抢答器软件设计…………………………………………………………………………8
总结…………………………………………………………………………………………9
谢辞…………………………………………………………………………………………10
参考文献……………………………………………………………………………………11
附录…………………………………………………………………………………………12
主程序………………………………………………………………………………………14