单片机数字频率计设计_本科毕业设计 40;论文 41;.doc

本科毕业设计(论文) 题目： 数字频率计设计 教学单位： 机电工程系 专 业： 自动化 2013年 5月 摘 要 设计以AT89C51单片机为核心，被测的矩形波或者方波整形为脉冲后输入单片机。利用单片机的计数器和定时器的功能对被测信号进行计数。编写相应的程序可以使单片机自动调节测量的量程，并把测出的频率数据送到显示电路显示。 本设计的目的是通过对单片机原理及应用的学习，以及查阅相关资料，培养自学与动手能力，把学到的知识应用到日常生活当中。在设计的过程中，不断的补充不知道的知识、巩固所学、相互讨论，运用科学分析问题的方法解决设计中遇到的困难，掌握单片机系统一般的开发流程，学会对常见问题的处理方法，积累设计系统的经验，充分发挥教学与实践的结合。设计出符合要求的数字频率计。 关键词：单片机；数字频率计；设计； Abstract Design USES AT89C51 microcontroller as the core, measured in square wave or a square wave input microcontroller after plastic for pulse. Using single chip microcomputer counter and timer function to count the signal to be measured. Write the corresponding program can make the single chip microcomputer automatic adjust the range of measurement, and send the frequency of the measured data display circuit. The purpose of this design is based on single chip microcomputer principle and application of learning, and access to relevant data, the cultivation of self-study and practical ability, the application of knowledge to the daily life. Supplement in the process of design, and constantly dont know knowledge, consolidate learning, mutual discussion, using the scientific method to analyze the problem to deal with the difficulties encountered in the design, master the single-chip microcomputer system development process, learn to deal with common methods, accumulate the experience of the design system, give full play to the combination of teaching and practice. Digital frequency meter designed to meet the requirements. Key words: single chip microcomputer; Digital frequency meter; Design; 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc356159177 第1章 前言 PAGEREF _Toc356159177 \h 1 HYPERLINK \l _Toc356159178 1.1 题目背景及研究意义 PAGEREF _Toc356159178 \h 1 HYPERLINK \l _Toc356159179 1.2 设计内容及参数要求 PAGEREF _Toc356159179 \h 2 HYPERLINK \l _Toc356159180 1.2.1 设计内容 PAGEREF _Toc356159180 \h 2 HYPERLINK \l _Toc356159181 1.2.2 参数要求 PAGEREF _Toc356159181 \h 2 HYPERLINK \l _Toc356159182 第2章