Filter
Top Products
9.3.1.3APrioriTransfer
Programming
www.ti.com
•Wordcount=2*ceil(frame_length/2)
•BCNT=(Wordcount/2)(NoofarraysoflengthACNT)
•DESTINATIONADDRESS:TCPSP(50010000h)
•SRCBIDX=8(Source2ndDimensionIndex)
•DSTBIDX=8(Destination2ndDimensionIndex)
•SRCCIDX=8(Source3rdDimensionIndex)
•DSTCIDX=8(Destination3rdDimensionIndex)
•CCNT=8(Noofframesinablock)
•BCNTRLD:Don'tcare
•LINKADDRESS:Seecases1and2below
Uponcompletion,thisEDMA3transferislinkedtooneofthefollowing:
1.TheEDMA3inputconfigurationparameterstransferparametersofthenextuser-channel,ifthereis
onereadytobedecodedandthecurrentdecodingisaMAP0fromthefirstiteration.
2.DummyEDMA3transferparameters,iftherearenomoreuserchannelsreadytobedecoded.
ThisEDMA3transfertotheapriorimemoryisaTCPXEVTchainedandframe-synchronizedtransfer.This
EDMA3transferischainedfromthesystematicandparitydatatransferandoccursonlywhenexecuting
anyMAPbuttheMAP0ofthefirstiteration;thatis,theOPMODbitsinTCPIC0mustbesetto2h,4h,and
6hrespectively.Theparametersshouldbesetas:
•OPTIONS:
–ITCCEN=0(Intermediatetransfercompletechainingisdisabled)
–TCCEN=0(Transfercompletechainingisdisabled)
–ITCINTEN=0(Intermediatetransfercompleteinterruptisdisabled)
–TCINTEN=1(Transfercompleteinterruptisenabled)
–TCC=1to63(TransferCompleteCode)
–TCCMODE=0(NormalCompletion)
–FWID=Don'tcare
–STAT=0(Entryisupdatedasnormal)
–SYNCDIM=1(A-Sync.EacheventtriggersthetransferofACNTelements.)
–DAM=0(Dstaddressingwithinanarrayincrements.DstisnotaFIFO.)
–SAM=0(Srcaddressingwithinanarrayincrements.SourceisnotaFIFO.)
•SOURCEADDRESS:Aprioristartaddress(mustbedouble-wordaligned)
•IftheOPMOD==FIRST_SUB_FRAME
ACNT=8*ceil((frame_length+prolog_length)/8)⇒(Noofbytesinanarray)
•IftheOPMOD==MIDDLE_SUB_FRAME
ACNT=8*ceil((frame_length+2*prolog_length)/8)⇒(Noofbytesinanarray)
•IftheOPMOD==LAST_SUB_FRAME
ACNT=8*ceil((frame_length+prolog_length)/8)⇒(Noofbytesinanarray)
•BCNT=1(NoofarraysoflengthACNT)
•DESTINATIONADDRESS:TCPAP(50040000h)
•SRCBIDX=0(Source2ndDimensionIndex)
•DSTBIDX=0(Destination2ndDimensionIndex)
•SRCCIDX=0(Source3rdDimensionIndex)
•DSTCIDX=0(Destination3rdDimensionIndex)
•CCNT=1(Noofframesinablock)
•BCNTRLD:Don'tcare
•LINKADDRESS:Seecases1and2below
Uponcompletion,thisEDMA3transferislinkedtooneofthefollowing:
72TMS320C6457Turbo-DecoderCoprocessor2SPRUGK1–March2009
SubmitDocumentationFeedback