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CCD數(shù)據(jù)采集系統(tǒng)中EZ-USB_FX2的固件程序設(shè)計(jì)及應(yīng)用

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

作者: 張倩  陸建榮  劉有軍 
單位:北京工業(yè)大學(xué)生命科學(xué)與生物工程學(xué)院(北京 100124)
關(guān)鍵詞: CY7C68013;CCD數(shù)據(jù)采集系統(tǒng);USB20;固件程序;GPIF 
分類號(hào):
出版年·卷·期(頁碼):2010·29·2(149-153)
摘要:

CCD(電耦合器件)數(shù)據(jù)采集系統(tǒng)要求其接口能夠?qū)崿F(xiàn)快速穩(wěn)定的數(shù)據(jù)傳輸。CY7C68013是一款集成USB2.0方案的芯片,其設(shè)計(jì)能充分體現(xiàn)USB2.0的數(shù)據(jù)帶寬特征。本文結(jié)合CCD數(shù)據(jù)采集系統(tǒng)的特點(diǎn),利用CY7C68013芯片設(shè)計(jì)USB2.0數(shù)據(jù)接口,重點(diǎn)分析了GPIF(通用可編程接口)模式下的固件程序設(shè)計(jì),包括GPIF波形設(shè)計(jì)、端點(diǎn)配置和讀事務(wù)處理等,實(shí)現(xiàn)基于USB2.0的單向數(shù)據(jù)傳輸功能。在測試實(shí)驗(yàn)中,將外部信號(hào)源發(fā)出的數(shù)據(jù)由外設(shè)FIFO(先入先出存儲(chǔ)器)傳輸至上位機(jī),實(shí)現(xiàn)了高速的數(shù)據(jù)傳輸,測得最大的傳輸速度為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 microcontroller 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 unidirection 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.
 

參考文獻(xiàn):

[1]Universal Serial Bus Specification Revision 2.0,2001.
[2]周煒,徐圣普, 趙金城, 等. USB接口技術(shù)在現(xiàn)代醫(yī)學(xué)儀器中的應(yīng)用[J]. 國際生物醫(yī)學(xué)工程雜志, 2007, 30(1): 62-64.
[3]陳云飛, 胡榮強(qiáng), 李偉. 基于EZ-USBFX2的固件程序設(shè)計(jì)[J]. 電子元器件應(yīng)用, 2007, 9(1): 42-44.
[4]Cypress Semiconductor Corporation. EZ-USB FX2TM USB Microcontroller, 2005.
[5]Cypress Semiconductor Corporation. EZ-USB FX2 Technical Reference Manual, 2002.
[6]張濤, 浦國斌, 范志永, 等. 一種CCD光譜儀的USB2.0固件設(shè)計(jì)[J]. 微計(jì)算機(jī)信息(測控自動(dòng)化), 2008,(25): 303-304.
[7]錢峰. EZ-USB FX2單片機(jī)原理、編程及應(yīng)用[M]. 北京: 北京航天航空大學(xué)出版社, 2006.
[8]劉久思, 趙蔚. 實(shí)現(xiàn)USB2.0高速數(shù)據(jù)傳輸?shù)膯栴}探討[J]. 計(jì)算機(jī)工程與應(yīng)用, 2007, 43(2):75-77.
 
 

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