齐羽-labview在嵌入式系统开发中的应用

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1、LabVIEW在嵌入式系统开发中的应用齐羽清华大学基础工业训练中心主要内容•算法性能的快速验证•通过LabVIEWFPGA快速构建嵌入式实验系统LabVIEW及虚拟仪器技术应用领域SensorsDSPFPGAsonNIRIOHandheldDevicesVisionSystemsEmbeddedControllersProgrammableAutomation ControllersPXIIndustrialControllersPortablePCs DesktopPCsLabVIEWEmbeddedModuleforADIBlackfinL

2、abVIEWEmbeddedModuleforADIBlackfin–Dataflowprogramming–ControlmethodologiesNILabVIEWEmbeddedModuleforADIBlackfin–I/Ocontrolandintegration–Integrationoftraditionaltools–Hand-tunedalgorithms–HighdegreeofcodereuseVisualDSP++EmbeddedKernel/OS–StrongdebuggingcapabilitiesLabVIEWEm

3、beddedModuleforADIBlackfinAcomprehensiveGraphicalProgrammingdevelopmentenvironment forembeddeddesignjointlydevelopedbyADIandNI.•IntegratesLabVIEWandCustomerApplicationVisualDSP++todeliveraneasytouseprogrammingtoolset.•Graphicalprogrammingwith LabVIEWonBlackfinis•OptimizedCco

4、de generationtechnology•LinkedofVDSPcompiler andlinkertoLabVIEWGeneratedCCodeComponentDriversBlackfinOptimizedVIs•TargetsBlackfin531～538548…VisualDSP++Kernel(VDK)DeployingwithLabVIEWMyTopLevelVI.viCodeGenerationMy_Top_Level_VI.cRuntimeLibraryTargetSpecificImplementedbyYouBui

5、ldMy_Top_Level_VI.dxeDebugDownload/Ru nLabVIEW＋VisualDSP++联合调试DevelopFract_16FFTVIwithLabVIEW利用VisualDSP开发的Fract_16FFT＋＋算法程序调用LabVIEW中的FFT.vi库VI实现FFT（）算法•Float-point算法•在Blackfin处理器上运行效率比较低利用LabVIEW编写Fract_16的定点FFT算法程序Fract_16定点FFT算法程序后面板PerformanceTest:My_FFTvsNI_FFTDebugMod

6、eVS.ReleaseMode•Debug—Appliesnocompileroptimizations,whichallowsforC source-leveldebuggingusingVisualDSP++.Thismakesthe embeddedapplicationlargerinsize.•Release—Appliescompileroptimizations,whichdoesnot allowforCsource-leveldebugging.Thismakestheembedded applicationsmallerin

7、sizeandfaster.DebugMode测试程序•可以实时改变CoreVoltage•可以测试库VI与自己编写的SubVIReleaseMode测试程序•与frontPanel无数据交换DebugMode下性能比较ICoreVoltage(V)CoreFrequency(MHz)1024FFTElapsedTime*(ms)Ratio(My_FFTvsNI_FFT)(%)NI_FFT1.25600345---0.85250529---My_FFT1.2560028984%0.8525046187%*:ElapsedTimeCalculat

8、edwithLabVIEWEmbeddedModuleforADIBlackfinv1.0DebugMode下性能比较IICoreVoltage(V)