DSPBIOS与C54x扩展寻址

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1、ApplicationReportSPRA599A-November2000DSP/BIOSandTMS320C54xExtendedAddressingScottGary,DonGillespie,ChanglinChenDSPKernelTechnologyGroupABSTRACTDSP/BIOSprovidesbasicruntimeservicesincludingreal-timeanalysisfunctionsforinstrumentinganapplication,clockandperiodicfunction

2、s,I/Omodules,andapreemptivescheduler.DSP/BIOSäfortheTMS320C54xäDSPgenerationwasoriginallydevelopedforthe16-bitaddressingmodeloftheearlyC54xädevices.Programaccessesinthis‘near’modelwerelimitedtoasingle64Kwordprogrampage.NewerC54xdevicesincorporate‘far’extendedaddressing

3、modes,andDSP/BIOShasbeenmodifiedtoworkinthisenvironment.ThisapplicationreportdescribeshowtoconfigureanduseDSP/BIOSinextendedaddressingapplications.Contents1BackgroundInformation.............................................................21.1ExtendedProgramMemory......

4、..................................................21.2Interrupts........................................................................32UsingDSP/BIOSinFarModelApplications............................................42.1Requirements....................................

5、................................52.2Illustration1:DSP/BIOSAPICall...................................................52.3Illustration2:HardwareInterruptTriggersSoftwareInterruptPreemption.................63ProgrammingExample..............................................

6、.................73.1ConfiguretheApplication..........................................................83.2EdittheLinkerCommandFile.....................................................103.3BuildtheApplication.............................................................1

7、03.4EnableExtendedAddressinginCodeComposer....................................113.5LoadandRuntheApplication.....................................................114References.........................................................................12ListofFiguresFigure1.

8、DSP/BIOSInterfaces.............................................................2Figure2.ExtendedProgramMemorywhenOVLY