1、毕业设计(论文)说明书 I 摘 要 随着科学技术的不断发展,促使人们学科学、学技术、学知识的手段多种 多样。抢答器作为一种工具,已广泛应用于各种智力和知识竞赛场合。但抢答 器的使用频率较低,且有的要么制作复杂,要么可靠性低,减少兴致。做为一 个单位若专购一台抢答器虽然在经济上可以承受,但每年使用的次数极少,往 往因长期存放使(电子器件的)抢答器损坏,再购置的麻烦和及时性就会影响 活动的开展,因此设计了本抢答器。 本设计是以六路抢答为基本理念。考虑到依需设定限时回答的功能,利用 AT89C51 单片机及外围接口实现的抢答系统, 利用单片机的定时器/计数器定时 和记数的原理,将软、硬件有机地结合起
2、来,使得系统能够正确地进行计时, 同时使数码管能够正确地显示时间。用开关做键盘输出,扬声器发生提示。同 时系统能够实现:在抢答中,只有开始后抢答才有效,如果在开始抢答前抢答 为无效;抢答限定时间和回答问题的时间可在 1-99s 设定;可以显示是哪位选 手有效抢答和无效抢答,正确按键后有音乐提示;抢答时间和回答问题时间倒 记时显示,满时后系统计时自动复位及主控强制复位;按键锁定,在有效状态 下,按键无效非法。 关键词关键词: AT89C51; LED 数码管; 抢答器; 计时; 报警 毕业设计(论文)说明书 II ABSTRACT With the continuous development
3、of science and technology, promote learning science, science and technology, knowledge of the variety of means. With a tool for Qiangda, which has been widely used in all kinds of intelligence and knowledge contests occasions. But Qiangda is used for lower frequency, and some production complex or l
4、ow reliability, and reduced interest. As a unit, if the purchase is a Qiangda .Although the economy can bear, each year the number is extremely small, because of the long-term storage (electronic devices) Qiangda for damage to the purchase of the trouble and timeliness of activities, The development will be affected, so this Qiangda is designed . This design is six road Qiangda as the basic concept.By taking into account the need for seting time and limiting to answer the function, which uses