基于内嵌Cortex-M3内核FPGA的等精度频率计设计  

Design of Equal Precision Frequency Meter Based on FPGA with Embedded Cortex-M3 Core

作　　者：王立华[1] 周松江[1,2] 高世皓 张恒[1] 

机构地区：[1]山东科技大学电子通信与物理学院,山东青岛266590 [2]北京邮电大学信息光子学与光通信研究院,北京100876 [3]北京邮电大学泛网无线通信教育部重点实验室,北京100876

出　　处：《实验室研究与探索》2017年第7期139-143,181,共6页Research and Exploration In Laboratory

摘　　要：为了提高频率计的测量精度和系统性能,解决在传统的频率计中无法实现高低频率等精度测量的情况,采用京微雅格公司的M7系列FPGA,设计了一种基于SOPC技术的等精度多功能频率计。该频率计以内嵌Cortex-M3内核的FPGA芯片为控制核心,通过对FPGA模块和Cortex-M3内核部分的设计,并借助AHB接口的FIFO实现FPGA与Cortex-M3内核之间的数据通信,完成了1Hz^50MHz范围内等精度频率计的设计。通过Model Sim软件仿真和硬件实测表明,该频率计可以完成等精度频率和占空比的测量功能,具有精度高、实时性好等特点。In order to solve the problem that the traditional frequency meter cannot achieve equal precision in high or low frequency measurement,improve the precision and performance of frequency meter,an equal precision frequency meter based on SOPC is designed in this paper. An FPGA chip that is embedded with Cortex-M3 as the system＇s controlling core,through the design of FPGA module and Cortex-M3 module,data communication between FPGA and Cortex-M3 is achieved by FIFO with AHB interface. The device completes the design of equal precision frequency meter in 1Hz ~50MHz range. By Model Sim software simulation and hardware testing,the frequency meter can complete equal precision frequency and has duty ratio measuring function,and has the characteristics of high precision and good real-time.

关 键 词：频率计 等精度 可编程片上系统 现场可编程门阵列 高性能总线 CORTEX-M3 

分 类 号：TM935.13[电气工程—电力电子与电力传动]