基于FPGA的高速ADC数据采集系统设计  

Design of High-Speed ADC Data Acquisition System Based on FPGA

作　　者：石朗杰 薛萌 于呈豪 郭汉明[1] SHI Langjie;XUE Meng;YU Chenghao;GUO Hanming(School of Optical-electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《软件导刊》2024年第12期136-142,共7页Software Guide

基　　金：上海市地方能力建设项目(21010502900)。

摘　　要：针对激光扫描共聚焦显微镜的大视场、高分辨率需求,为在振镜扫描的时间内获取更多数据量,设计一种基于FPGA的高速数据采集系统。该系统采用Xilinx的A7系列FPGA作为主控芯片,同时选用TI公司提供的LMK0482X系列时钟发生器和一款支持JESD204B协议的单通道14位高速ADC14X250芯片共同组成信号采集系统。系统使用Verilog硬件描述语言在Vivado平台下实现各模块功能,通过SPI协议完成LMK0482X和ADC14X250芯片的寄存器配置,利用Xilinx提供的JESD204B IP核构建基于AXI协议的高速串行数据链路,实现ADC与FPGA之间高效的数据采集传输。实验结果表明,在5 Gbps的传输速率下,接口可以正确接收与解析数据,系统的采样速率可达到250 Mbps,数据采样精度为14 bit,符合激光扫描共聚焦成像仪器的数据采集要求。Aiming at the requirement of large field of view and high resolution of laser scanning confocal microscope,a high-speed data acquisition system based on FPGA is designed in order to obtain more data in the scanning time of galvanometer.This system uses Xilinx A7 series FPGA as the main control chip,LMK0482X series clock generator provided by TI company and a single channel 14-bit high-speed ADC14X250 chip supporting JESD204B protocol to form the signal acquisition system.The system uses Verilog hardware description language to realize each module function under Vivado platform,and completes the register configuration of LMK0482X and ADC14X250 chips through SPI protocol,and constructs high-speed serial data link based on AXI protocol by using Xilinx´s JESD204B IP core,realizing efficient data acquisition and transmission between ADC and FPGA.The experimental results show that the interface can receive the analytical data correctly at the transmission rate of 5 Gbps,the sampling rate of the system can reach 250 Mbps,and the data sampling accuracy is 14 bit,which meets the data acquisition requirements of laser scanning confocal imaging instruments.

关 键 词：FPGA 高速ADC 数据采集 共聚焦显微镜 

分 类 号：TP302.1[自动化与计算机技术—计算机系统结构]