数字频率计设计_00002.doc

毕 业 设 计 中文题目 数字频率计的设计 英文题目The design of digital frequency meter 系 别： 电子与电气工程系 年级专业： 电子信息工程 姓 名： 学 号： 指导教师： 职 称： 2011年 5 月 日 摘 要 现代电子设计技术的核心已日趋转向基于计算机的电子设计自动化技术，即EDA技术。它与电子技术、微电子技术的发展密切相关，吸收了计算机科学领域的大多数必威体育精装版研究成果，以高性能的计算机作为工作平台，促进了工程发展。本文EDA技术的发展概况，FPG开发的 关键词:VHDL语言数字频率计Abstract The core of modern electronic design technology has been turning to computer based on electronic design automation technology ,that calls EDA technology . The EDA technology, which is closely connected with the electronic technology, microelectronics technology and computer science, can be used in designing electronic product automatically. In the field of electronic technology , frequency is one of the most basic parameters, it has very close relationship with the parameters of many measurement schemes and measuring results . This paper briefly introduced the EDA technology, the development of FPGA and the hardware description language.After the analysis of the high-accuracy digital frequency meters theory ,I decided to design one based on FPGA . The design of system consists of FPGA and MCU. In the FPGA section, make the tested frequency and standard frequency count at the same time, then let the count value out by the Data Selector.The MCUs function is processing the output data, and then display the tested frequency by the 8-bit led . The FPGAs function is realized by VHDL.The platform of development is Quartus Ⅱ.The MCUs function is realized by C.The platform of development is Keil. The system has the advantage of high-accuracy and convenience.Its very practical . Keywords:EDA ,VHDL ,digital frequency meter 目 录 摘要 I Abstract II 第一章 绪论 1 1.1课题背景及目的 1 1.2研究现状 1 1.3 EDA技术介绍 2 1.31 电子设计自动化技术及其发展 2 1.32 EDA的优势 3 1.4课题的主要研究内容 3 第2章 系统分析及总体设计 5 2.1数字频率计工作原理概述 5 2.11常用测频方案 5 2.12等精度测频原理 6 2.13等精度测频的误差分析 8 2.2 系统总体设计方案 8 2.21 频率计系统设计任务与分析 8 2.22 系统总体设计方案 9 2.3系统的硬件电路介绍 10 2.31 FPGA部分的硬件介绍 10 2.32 单片机部分的硬件介绍 11 2.33 FPGA与单片机的硬件电路连接 11 2.4 本章小结 12 第三章 系统的软件设计 13 3.1 V