基于ARM与FPGA的高速数据采集技术研究

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1、北京交通大学硕士学位论文基于ARM与FPGA的高速数据采集技术研究姓名：王亚庭申请学位级别：硕士专业：计算机系统结构指导教师：高金山20071201ABSTRACTABSTRACT：InthispaperWehaveresearchedondesignandrealizationofhi．ghspe村dataacquisitiontechnology．WedesignedasharedmemorystructurebasedOnARM&FPGA．Weaccomplishedthesystemsoftwar

2、eunderLinnxenviroment,includingthetouck．screencontrol，LCDdisplay,sineinterpolationalgorithmdesignandvariousofdisplayalgorithmdesign．Wehavetestedthehigh-speeddataacquisitionandprocessingsystem,andanalyzedthetestdata．Wedescribeoursystemintwoways．Oneisthehar

3、dwaredesign,theotheristhedevicedriverdesignandapplicationprogramdesignbasedonARMlinuxOS．Inthehardwaredesign,ontheFPGAchip,firstweconvertedonechannelofhigh·speeddataintofourchannelsoflow-speeddatawhichfrequencyisaquarteroftheoriginalfrequencywiththeping-po

4、ngoperatiorLSecondWestoredeachchannelofdataInaFIFO．ThirdwerecombinedthedataintheFIFOsandstoredtheminadouble-portRAM．LastweconnectedtheRAMtothebusoftheARMsystem,whichisasharedmemorywedeveloped．ARMprocessorc趾readthedatainRAMefficiently．Wedesignedthesampling

5、frequencycontrolcircuitbytheFPGA，BychangingthedatastoragefrequencyoftheFIFOwecontrolledthedataacquisitionfl'equmcy．Inthesoftwaredesign,atfirstWeportedtheARMLInuxontoARMformoreeffectiveadministrationandsystemupgrade．ThenWedesignedtheTouchScrcendevicedriver

6、,LCDdevicedriver,FPGAdevic圮driver,LCDdisplayprogramandMultithreadingapplication．ThesystemcallworkstablywitlIthesamplingfrequency125MHz．It啪displaynormallythewaveformofthesignal．whichfrequencyisbelow5MHz．AndWe锄usethesineInterpolationalgorithmtoprocessanddis

7、playthehighfrequencysignal，whichfrequencyisbelow40MHz．Thishardwarestl-uctureisahighlyscalablesys【emstructure,WCcanachieve8channelsandevm16channelsFIFObuffersystemsh'ucture,whichwillmakethesystemsupporthighersamplingfrequency．KEYWORDS：Highspeeddataacquisit

8、ion；Embeddedsystem；LInux；ARM；FPGA；Linuxdevicedriver；SharedmemoryCLASSNO：TP274．2；TP316．81学位论文版权使用授权书本学位论文作者完全了解北京交通大学有关保留、使用学位论文的规定。特授权北京交通大学可以将学位论文的全部或部分内容编入有关数据库进行检索，并采用影印、缩印或扫描等复制手段保存、汇编以供查阅和借阅。同意学校向国家有关部门或机构送交论文的