基于单片机的8路抢答器设计与实现.doc

课程设计 Ⅱ（论文） 题 目：,它能根据不同的抢答输入信号，经过单片机的控制处理并产生不同的与输入信号相对应的输出信号，最后通过LED数码管显示相应的路数，即使两组的抢答时间相差几微秒，也可分辨出是哪组优先按下的按键，它充分利用了单片机系统的优点，具有结构简单、功能强大、可靠性好、实用性强的特点。 本设计是以八路抢答为基本理念。考虑到依需设定限时回答的功能，利用52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，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；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Abstract With the development and popularization and technology,more and more kinds of competitions,including the role of Responder also obvious.At present,many Responder basically small-scale digital integrated circuit design,use less than ideal.Therefore easier to use and design of a high distinction Responder become very urgent task.Now have access to all areas of SCM.its power consumption is small,intelligent and known,so if the Responder to use microcontrollers to design,so that these problems will be solved.Fpr the above ,this paper designed to AT89S52microcontroller as the core of the eight-Responder.We use a direct digital display indicator,automatic latch display the results,and zutomatically reset the design,it can depending on the answer in the input signal,after processing and MCUcontrol have different input signal correspomding to the output signal,and finally through LED display the corresponding ones,even if the answer in the time difference between two groups of a few microsecond,which can idently the priority pressed the button,it takes full advantage of the advantagesof single-chip System,with asimple,powerful,reliable good,practical features. The answer in the basic design concept is based on eight Limit to be set by taking into account the response function,using 89S52 nicrocontroller and the external interface of the answer in the system,the use of single-chip timer/counter timing and counting principle ,the hardware and software and software together organically ,enabling the system to correct to carry out time ,while the digital control to display the time correctly.Switching to do with the key