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1、PWM_DAC_DRV3-channelPWMDACDriverDescriptionThismoduleconvertsanys/wvariableswithQ15representationintothePWMsignalsinEVBfor281xorEPWM4-6for280x.Thus,itcanbeusedtoviewthesignal,representedbythevariable,attheoutputsofthePWM7,PWM9,PWM11(for281x)orEPWM4A,EPWM5A,EPWM6A(fo
2、r280x)pinsthroughtheexternallow-passfilters.PwmDacInPointer0PWM7orEPWM4APWM_PWMDAC_PwmDacInPointer1PWM9orEPWM5ADRVPwmDacInPointer2H/WPWM11orEPWM6AQ15AvailabilityThis16-bitmoduleisavailableinoneinterfaceformat:1)TheCinterfaceversionModulePropertiesType:TargetDependen
3、t,ApplicationIndependentTargetDevices:x281xorx280xCVersionFileNames:f281xpwmdac.c,f281xpwmdac.h(forx281x)f280xpwmdac.c,f280xpwmdac.h(forx280x)IQmathlibraryfilesforC:N/AItemCversionComments□CodeSize84/264words(x281x/x280x)DataRAM0words•xDAISreadyNoXDAIScomponentNoIAL
4、GlayernotimplementedMultipleinstancesYesReentrancyYes•Eachpre-initializedPWMDACstructureconsumes11wordsinthedatamemory□Codesizementionedhereisthesizeoftheinit()andupdate()functionsDigitalControlSystems(DCS)Group1TexasInstrumentsCInterfaceCInterfaceObjectDefinitionTh
5、estructureofPWMDACobjectisdefinedbyfollowingstructuredefinitiontypedefstruct{int16*PwmDacInPointer0;//Input:PointertosourcedataoutputonPWMDACch0int16*PwmDacInPointer1;//Input:PointertosourcedataoutputonPWMDACch1int16*PwmDacInPointer2;//Input:Pointertosourcedataoutpu
6、tonPWMDACch2Uint16PeriodMax;//Parameter:PWMDAChalfperiodinnumberofclocks(Q0)void(*init)();//Pointertotheinitfunctionvoid(*update)();//Pointertotheupdatefunction}PWMDAC;typedefPWMDAC*PWMDAC_handle;ItemNameDescriptionFormatRange(Hex)InputsPwmDacInPoinTheseinputvariabl
7、escontaintheN/AN/Aterx(x=0,1,2)addressesofthedesireds/wvariables.OutputsPWMxOutputsignalsfromthePWM7-N/A0-3.3V(x=7,9,11)12pinsinEVBontheorx2812eZdsporEPWM4-6pinsEPWMxAonthex2808eZdsp.(x=4,5,6)PWMDACPeriodMaxPWMDAChalfperiodinnumberQ08000-7FFFparameterofclocksSpecial
8、ConstantsandDatatypesPWMDACThemoduledefinitioniscreatedasadatatype.ThismakesitconvenienttoinstanceaninterfacetothePWMDACdriver.Tocreatemul
