文档介绍：-1- 基于 FPGA 的等精度频率计的设计摘要本文提出了一种采用 VHDL 语言在 FPGA (EP1C12Q240C8 )平台上设计实现等精度频率计的方法。该方法设计的频率测量系统在对频率变化范围较大的信号进行频率测量时能够满足高速度、高精度的测频要求。系统的软件设计、编译、调试、仿真以及下载工作采用 Quartus Ⅱ 完成。该等精度频率计的测量频率值采用 VGA 显示,同时显示 10秒内频率的测量情况,具有良好的人机界面。关键词: FPGA 、VHDL 、等精度、频率计、 VGA ABSTRACT This paper mainly introduces amethod which uses VHDL language inthe FPGA (EP1C12Q240C8) platform designed toachieve the frequency accuracy. This method isdesigned frequency measurement system inthe frequency range ofthe signal frequency measurements tomeet the high-speed, high-precision frequency measurement requirements. System software design ing ,compil ing ,debugging, simulation, and download ing the work are pleted bythe use ofQuartus Ⅱ. The system uses VGA display toshow themeasured value ofthefrequency ofprecision, atthe same time itshow sthe frequency ofmeasurements in10seconds .This design has a good man-machine interface. And has realized broad band measurement and can meet the request ofhigh speed and high degree uracy. Keywords FPGA,VHDL, Precision survey ,frequency meter, VGA 目录引言........................................................................................................................ -3- -2- ............................................................................................................ -4- 等精度频率测量原理.............................................................................. -4- 误差分析.................................................................................................. -5- .................................................................................................................... -6- FPGA 可编程逻辑器件............................................................................ -6- VHDL 硬件描述语言................................................................................ -7- Quartus Ⅱ开发环境........................................................................... -8- E-PLAY-SOPC 系列开发板.......................................