简介:DesignofIREDMSystemwithaDSPPhaseDetector①LIUJianguo,WEIQingnong(AnhuiInstituteofOpticsandFineMechanics,ChineseAcademyofScienc...
简介:OnthebasisoftheactualDSPsystemdevelopment,illustratedisthedesignoftheconnectionbetweenDSPandFlash,compiledaretheintegrityproceduresofFlasherasureandprogramming.Besides,designedistheconnectionbetweenfull-duplexEthernetcontrollerRTL8019ASwiththeexternalmemoryinterfaceofDSP.Furthermore,thestepsofflashonlineprogrammingthroughEthernetaredescribedindetail.Theremoteupgradeandupholdarerealizedbythedesign.
简介:Theprocessingspeedofthecommunicationbetweennodesinaparallelprocessorhasbecomethemajorbottleneckoftheprocessor'sperformance.RDMA(RemoteDirectMemoryAccess)technologyhasdrawnmoreattentionrecentlyduetoitscapabilityoftransferringalargeramountofdata,higherspeedandreliability.4DSP(4DigitalSignalProcessing)modulecomprisedofTiger-SHARC201chipisconnectedbyLVDS(LowVoltageDifferentialSignal)circuits.ThispaperproposesageneralandreconfigurableRDMAplatformanditscorrespondingcommunicationprotocolwithalltherouteslinkedbasedonthezerocopy.TheprotocoltransfersmessageofDSPbyinterruptingofDMAandisappliedonmassiveremoteimageimpression,whichreducesmemoryneedsandworkingburdenofCPU.Theexperimentresultsshowthisplatformisefficient,flexible,andexpandableofbeingintegratedtoalargerscaleinthenextdevelopmentstages.
简介:Aninfraredreal-timeimagingsystemusingDSP(digitalsignalprocessor)asthekernelofdigitalsignalprocessingboardispresented.Inthissystem,theimagingdifferenceandnonuniformitycorrectionmethodisdevelopedonthechiptakingadvantageofDSPwithhighspeed.Themethodcombineshardwareandsoftwaretogether,sothatthedifficultyforrealizingsuchamethodwithotherhardwarecanbeovercome.
简介:BasedonthestructureandbootloaderprincipleofDSPsystem,amethodfortheremoteupdation,debuggingandself-loadingofDSPsystemisdevelopedbyEthernet.HardwarecircuitandDM9000drivenprogramarepresentedandTCP/IPprotocolisembeddedintoDSP.Throughthere-mappingofexternalmemoryaddress,itiseasytoimplementtheloadofprogramsectionselectivelyandDSPself-boot.Theexperimentalresultsshowthattheproblemofhighcostinsystemmaintenancebyconventionalfielddebuggingbyemulatorandthelimitationinchip-levelbootareresolved.
简介:PresentedisaschemeofanembeddedvideoremotemonitoringsystembasedonTMS320DM642.UsingDM642asthedataprocessingcore,theremotemonitoringsystemiscomposedofvideoacquisitionmodule,videoprocessingmoduleandcommunicationmodule,whichgivesanimplementationofclass/minidrivermoduleinDSP/BIOSintegrateddevelopingenvironmentandalsoacommontaskmoduleinapplicationlayerisachieved.Thesystemrealizestheentirefunctionsoftheanalogvideosignalacquisition,H.264videocodingandInternettransmission.Itprovidesthegeneralconnectionforthefuturedevelopmentandhasgoodflexibilityandextendibility.Thesystemusesamodulardesignandoveralldevelopmentofprogrammingmethodstoimprovetheefficiencyofsystemdevelopment.
简介:步进频率综合宽带技术是一种易于雷达工程实现的距离高分辨技术。但步进频率工作体制对目标的运动十分敏感,若不作速度补偿处理则最终综合成像处理结果将发生错误,因而步进频率综合宽带处理需包含速度补偿等一系列关键处理流程。首先阐述了步进频率综合宽带距离像的原理以及目标运动带来的影响,分析信号处理整体流程并提出基于相位差分-IFFT的速度估计算法。依据国产"魂芯一号"DSP平台进行最优化软件设计,提供了一种基于国产DSP的步进频率综合宽带处理实时系统方案。