单片机抢答器毕业论文.doc

单片机抢答器毕业论文


摘  要
数字抢答器由主体电路与扩展电路组成。优先编码电路、锁存器、译码电路将参赛队的输入信号在显示器上输出；用控制电路和主持人开关启动报警电路，以上两部分组成主体电路。通过定时电路和译码电路将秒脉冲产生的信号在显示器上输出实现计时功能，构成扩展电路。经过布线、焊接、调试等工作后数字抢答器成形。单片机体积小价格低，应用方便，稳定可靠。单片机将很多任务交给了软件编程去实现，大大简化了外围硬件电路，使外围电路的实现简单方便。单片机系统的硬件结构给予了抢答系统“身躯”，而单片机的应用程序赋予了其新的“生命”，使其在传统的抢答器面前具有电路简单、成本低、运行可靠等特色。对于抢答器我们大家都知道那是用于选手做抢答题时用的，选手进行抢答，抢到题的选手来回答问题。抢答器不仅考验选手的反应速度同时也要求选手具备足够的知识面和一定的勇气。选手们都站在同一个起跑线上，体现了公平公正的原则。

关键字： 抢答电路 定时电路 报警电路

 
a compendium

Digital vies to implement by corpus circuit and expansion circuit composed. Priority coding circuit, latches, decoder circuit will be the team's input signal on the display output, With the control circuit and the host switches on the alarming circuit, the above two parts subject circuit. Through the timing circuit and decoder circuit will seconds pulse signal on the display output of timing function, constitute expansion circuit. After wiring, welding, commissioning work digital vies to implement forming. In practical circuit design, need to go through the simulation software testing of circuit and programs compiled, check the periphery circuit design is reasonable, software compiler are proper and that the software and hardware circuit can normal work, can accurate realization design functions. If the test circuit emulation by, no problem can fully realize function words can actually do plate welding work.. SCM small volume low prices, easy application, it is stable and reliable. Microcontroller will many missions gave software programming to realize, greatly simplifying the peripheral hardware circuit, make the periphery the circuitry is simple and convenient.

Key word: scare-answering circuit timing circuit alarm circuit

 
目录

第一章  数字抢答器的概述及制作要求 - 8 -
1.1  数字抢答器的概述 - 8 -
1.2  设计任务与要求 - 8 -
第二章 单片机芯片的选择及抢答器方案 - 11 -
2.1单片机芯片的选择 - 11 -
2.2模块性能分析 - 14 -
第三章  硬件电路设计 - 16 -
3.1总体设计 - 16 -
3.2 外部振荡电路 - 17 -
3.3  复位电路的设计 - 17 -
第四章  系统软件设计 - 20 -
4.1 抢答器流程图 - 20 -
4.2 主程序 - 22 -
4.3 中断程序 - 25 -
第五章  产品的样品 - 28 -
结束语 - 29 -
参考文献 - 30 -
致　　谢 - 31 -