CCD数据采集系统中EZ-USB FX2的固件程序设计及应用  

Firmware Design Based on EZ-USB FX2 in CCD Data Acquisition System

作　　者：张倩[1] 陆建荣[1] 刘有军[1] 

机构地区：[1]北京工业大学生命科学与生物工程学院,北京100124

出　　处：《北京生物医学工程》2010年第2期149-153,共5页Beijing Biomedical Engineering

基　　金：国家自然科学基金(10872013);北京市自然科学基金(3092005)资助

摘　　要：CCD(电耦合器件)数据采集系统要求其接口能够实现快速稳定的数据传输。CY7C68013是一款集成USB2.0方案的芯片,其设计能充分体现USB2.0的数据带宽特征。本文结合CCD数据采集系统的特点,利用CY7C68013芯片设计USB2.0数据接口,重点分析了GPIF(通用可编程接口)模式下的固件程序设计,包括GPIF波形设计、端点配置和读事务处理等,实现基于USB2.0的单向数据传输功能。在测试实验中,将外部信号源发出的数据由外设FIFO(先入先出存储器)传输至上位机,实现了高速的数据传输,测得最大的传输速度为113.6Mb/s。Stable and fast data transmission of data acquisition system interface is needed for the special characters of charge couple device （CCD）output signals. CY7C68013 chip is a USB2.0 integrated mieroeontroller particularly designed to fully reflect data bandwidth of USB2.0. According to the features of CCD data acquisition system,an USB2.0 interface was designed based on CY7C68013 chip to realize data unidirection transmission. This paper mainly focused on the firmware design in general programmable interface （GPIF） mode, including programming the GPIF waveforms, configuration of endpoints and FIFO first in first out- Read transactions. In the experiment,data generated from external source was stored in peripheral FIFO and then transmitted by the designed interface to the host,reaching high-speed streaming data of 113.6Mb/s.

关 键 词：CY7C68013 CCD数据采集系统 USB2.0 固件程序 GPIF 

分 类 号：R318.04[医药卫生—生物医学工程]