预览加载中，请您耐心等待几秒...

基于NIOSⅡ的VGA控制器IP核的设计.docx

预览
1/2
2/2

在线预览结束，喜欢就下载吧，查找使用更方便

下载提示 文本预览

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

基于NIOSⅡ的VGA控制器IP核的设计 1.Introduction Withtheincreasingpopularityofdigitaldisplays,VGA(VideoGraphicsArray)hasbecomeastandardinterfaceforcomputersanddisplays.VGAcontrollersplayanimportantroleingeneratingtheseinterfaces.Inthispaper,wewilldiscussthedesignofaVGAcontrollerIPcorebasedonNIOSII,anembeddedsoft-coreprocessorfromAltera. 2.NIOSIIArchitecture NIOSIIisa32-bitgeneral-purposeRISCprocessorcoredesignedforuseinFPGA(Field-ProgrammableGateArray)designs.Itishighlyconfigurableandcanbecustomizedtomeetthespecificneedsofaproject.ThisflexibilitymakesitanidealchoiceforimplementingembeddedsystemsinFPGA-baseddesigns.TheNIOSIIarchitectureincludesafive-stagepipeline,aconfigurabledatacache,andaninstructioncache. 3.VGAControllerIPCoreDesign TheVGAcontrollerIPcoreisdesignedtogenerateVGAsignalsfromaNIOSII-basedFPGAdesign.ThecontrollerincludesaVGAtiminggenerator,aVGApixelgenerator,andaVGAoutputstage. 3.1VGATimingGenerator TheVGAtiminggeneratorisresponsibleforgeneratingthevarioustimingsignalsrequiredbytheVGAinterface.Thesesignalsincludehorizontalandverticalsyncsignals,blankingsignals,andactivevideosignals.ThetiminggeneratorisimplementedasastatemachinethatgeneratesthenecessarysignalsbasedontheVGAtimingspecification. 3.2VGAPixelGenerator TheVGApixelgeneratorisresponsibleforgeneratingthepixeldatarequiredbytheVGAinterface.Thepixeldataisgeneratedbyauser-definedapplicationrunningontheNIOSIIprocessor.ThepixeldataisreadfromamemoryblockandprocessedbytheVGApixelgeneratortogeneratetheappropriateRGBsignalsforeachpixel. 3.3VGAOutputStage TheVGAoutputstageisresponsibleforamplifyingandbufferingtheRGBsignalsgeneratedbytheVGApixelgenerator.TheoutputstagealsogeneratesthenecessaryvoltagelevelsrequiredbytheVGAinterface. 4.Conclusion Inthispaper,wehavediscussedthedesignofaVGAcontrollerIPcorebasedonNIOSII.ThecontrolleriscapableofgeneratingVGAsignalsfromauser-definedapplicationrunningonanFPGA.ThedesignutilizestheflexibilityofNIOSIItocustomizethecontrollertomeetthespecificneedsofaproject.FPGA-baseddesignsarebeco