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1、抢答器毕业设计论文抢答器毕业设计论文电子 101 班郎璐婷摘摘 要要随着科学技术的发展和普及，各种各样的竞赛越来越多，其中抢答器的作 用也就显而易见。目前很多抢答器基本上采用小规模数字集成电路设计，使用 起来不够理想，因此设计一个易于使用和区分度高的抢答器成了非常迫切的任 务。现在单片机已进入各个领域，以其功耗小、智能化而著称，所以若用单片 机来设计抢答器，更使以上的问题得以解决，针对以上的情况，本文主要以 AT89S52 单片机为核心器件,设计实现了五路抢答器系统。利用 C 语言编程及 单片机芯片与外围硬件电路来实现五路抢答、锁存、显示、定时、报警、清零 和优先抢答等功能。工作时，用按键通过
2、开关电路输入各路的抢答信号，经单 片机的处理，输出控制信号，控制数码管和其它硬件工作。在数码管上显示优 先答题组号以及答题之后的分数，从而实现整个抢答过程。关键词：单片机；AT89S52；数码管；抢答器ABSTRACTWith the development and popularization of science and technology, more and more variety into the contest, which will clear the role of Responder. Responder basically present, many small-scal
3、e digital integrated circuit design, is not ideal to use, so the design is easier to use and distinguish between a high of Responder has become a very urgent task.Now have access to all areas of SCM, with its low power consumption, known for intelligent, so if Responder microcontroller to design, mo
4、re so than the problems are resolved, for the above, this paper mainly AT89S52 microcontroller as the core component design Achieved eight Responder system. Use of C language programming and microcontroller chips and hardware to achieve the eight peripheral answer in, latch, display, time, alarm, cl
5、ear answer in other functions and priorities.Work, with the key switch circuit by the answer in the input signals from various quarters, the MCUs processing, the output control signal to control the digital pipes and other hardware work. Priority in the digital display group number and the answer af
6、ter answer the score, in order to achieve the answer in the process.Key words: microcontroller AT89S52 Octal LED Responder目目 录录摘 要 .I ABSTRACT.II 1 引言.1 2 系统功能.1 3 工作原理.2 4 主要元器件.3 4.1 主控芯片 AT89S52.3 4.2 报警器.6 4.3 数码管.7 4.4 晶体振荡器.10 5 硬件系统设计.12 5.1 电路总体构成.12 5.2 电源输入电路.12 5.3 复位电路.13 5.4 晶振电路.14 5.5 显示电路.14 6 软件程序设计.15 6.1 程序流程图.15 7 调试与实现.16 7.1 硬件调试.16 7.2 软件调试.16 7.3 Proteus 仿真.17 结论与展望.18 致 谢.19 参考文献.20 附录一.21 附录二.
