mipi-协议(附图)

ApplicationReportSWPA225–November20121DemystifyDSII/FErwanPetillonHWSystemsSolutionsABSTRACTThepurposeofthisApplicationNote(APN)istodemystifytheDSII/FbypresentingdifferentconfigurationandtheirimpactontheDSIprotocol.ThedocumentisillustratedbynumerouswaveformsprobeonanOMAPplatform.ThisAPNcoverstheDSIprotocolinvideomode(Non-framebufferdisplay)andincommandmode(framebufferdisplay).AsectiondedicatedtodebuggingtipsisenumeratingdifferentmethodtomeasurevariousparametersanddecodeLPandHSpackets.HowevertheAPNdoesnotcontainprogrammingmodelandcompleteDSIprotocolstandard,formoredetailsonprogrammingmodelrefertotheOMAPTechnicalReferenceManualandtheMIPIDSIprotocolstandard.DocumentHistoryVersionDateAuthorNotes1.0November2012E.PetillonFirstreleaseSWPA2252DemystifyDSII/FContents1MIPIDSIprotocol..........................................................................................................................41.1Commandmode.....................................................................................................................41.2Videomode............................................................................................................................42DSIvideomode............................................................................................................................72.1Blankingmode........................................................................................................................72.2Non-continuousclockmode..................................................................................................102.3Interleaving...........................................................................................................................123DSIcommandmode...................................................................................................................173.1TearingEffect(TE)control....................................................................................................173.1.1DSI-PHYTEtrigger...................................................................................................183.1.2CMOSTEline...........................................................................................................194Tipsanddebug...........................................................................................................................214.1Basicmeasurements............................................................................................................214.2Basicdecodingusinganoscilloscope...................................................................................244.2.1LPtransferDecodingusinganoscilloscope..............................................................244.2.2HStransferDecodingusinganoscilloscope.............................................................254.2.3DetermineallclockingandtimingsoftheDisplaysubsystem....................................27AppendixA.DisplaySubsystemconfiguration...............................................................................28References.........................................................................................................................................28FiguresFigure1:Videomode-packetsdefinitions........................................................................................5Figure2:Non-burstmodeSyncpulses..............................................................................................5Figure3:Non-burstmodeSyncevent................................................................................................6Figure4:Burstmode...........................................................................................................................6Figure5:HorizontalblankingoflastVACTandverticalblanking....................................................7Figure6:AllblankingdoneinHSblankingpackets..........................................................................8Figure7:SingleLPtransitionperframe............................................................................................8Figure8:BLANKING_MODE=0x0.......................................................................................................9Figure9:lastlinestransmittedbeforeverticalblankingwhenBLANKING_MODE=0x0.................9Figure10:DDR_CLK_ALWAYS_ON=0x0andallBlankingmodesetto0x1................................10Figure11:ZoomonverticalblankingwhenDDR_CLK_ALWAYS_ON=0x0andallBlankingmodesetto0x1.............................................................................................................11Figure12:DDR_CLK_ALWAYS_ON=0x0andBLANKING_MODE=0x0......................................11Figure13:DCSNOPcommandsentinLPduringverticallineblanking.......................................12Figure14:ZoomofDCSNOPcommandsentinLPduringverticallineblanking........................13Figure15:HSNOPDCScommandfollowedbyBTAduringaverticallineblanking....................14Figure16:ZoomofHSNOPDCScommandfollowedbyBTAduringaverticallineblanking.....