/**************************************************************************
- * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. *
* *
* Author: The ALICE Off-line Project. *
* Contributors are mentioned in the code where appropriate. *
* provided "as is" without express or implied warranty. *
**************************************************************************/
+/* $Id$*/
+
///////////////////////////////////////////////////////////////////////////////
-//
-// This is a class for reading ITS SDD raw data files and providing
-// information about digits
-//
+///
+/// This class provides access to ITS SDD digits in raw data.
+///
///////////////////////////////////////////////////////////////////////////////
#include "AliITSRawStreamSDD.h"
+#include "AliRawReader.h"
+#include "AliLog.h"
ClassImp(AliITSRawStreamSDD)
+
+const UInt_t AliITSRawStreamSDD::fgkCodeLength[8] = {8, 18, 2, 3, 4, 5, 6, 7};
-
-const Int_t AliITSRawStreamSDD::kDDLsNumber;
-const Int_t AliITSRawStreamSDD::kModulesPerDDL;
-const Int_t AliITSRawStreamSDD::kDDLModuleMap[kDDLsNumber][kModulesPerDDL] = {
- {240,241,242,246,247,248,252,253,254,258,259,260,264,265,266,270,271,272,276,277,278,-1},
- {243,244,245,249,250,251,255,256,257,261,262,263,267,268,269,273,274,275,279,280,281,-1},
- {282,283,284,288,289,290,294,295,296,300,301,302,306,307,308,312,313,314,318,319,320,-1},
- {285,286,287,291,292,293,297,298,299,303,304,305,309,310,311,315,316,317,321,322,323,-1},
- {324,325,326,327,332,333,334,335,340,341,342,343,348,349,350,351,356,357,358,359,364,365},
- {328,329,330,331,336,337,338,339,344,345,346,347,352,353,354,355,360,361,362,363,368,369},
- {366,367,372,373,374,375,380,381,382,383,388,389,390,391,396,397,398,399,404,405,406,407},
- {370,371,376,377,378,379,384,385,386,387,392,393,394,395,400,401,402,403,408,409,410,411},
- {412,413,414,415,420,421,422,423,428,429,430,431,436,437,438,439,444,445,446,447,452,453},
- {416,417,418,419,424,425,426,427,432,433,434,435,440,441,442,443,448,449,450,451,456,457},
- {454,455,460,461,462,463,468,469,470,471,476,477,478,479,484,485,486,487,492,493,494,495},
- {458,459,464,465,466,467,472,473,474,475,480,481,482,483,488,489,490,491,496,497,498,499}};
-
-
-AliITSRawStreamSDD::AliITSRawStreamSDD() :
- fRawReader("SDDslice", kTRUE)
+//______________________________________________________________________
+AliITSRawStreamSDD::AliITSRawStreamSDD(AliRawReader* rawReader) :
+ AliITSRawStream(rawReader),
+fDDLModuleMap(0),
+fData(0),
+fEventId(0),
+fCarlosId(-1),
+fChannel(0),
+fJitter(0),
+fNCarlos(kModulesPerDDL),
+fDDL(0),
+fEndWords(0),
+fResetSkip(0)
{
// create an object to read ITS SDD raw digits
+ fDDLModuleMap=new AliITSDDLModuleMapSDD();
+ fDDLModuleMap->SetDefaultMap();
+ Reset();
+ for(Int_t im=0;im<kSDDModules;im++){
+ fLowThresholdArray[im][0]=0;
+ fLowThresholdArray[im][1]=0;
+ }
+ for(Int_t i=0;i<kFifoWords;i++) fNfifo[i]=0;
+ for(Int_t i=0;i<kDDLsNumber;i++) fSkip[i]=0;
+ fRawReader->Reset();
+ fRawReader->Select("ITSSDD");
+ for(Short_t i=0; i<kCarlosWords; i++) fICarlosWord[i]=0x30000000 + i; // 805306368+i;
+ for(Short_t i=0; i<kFifoWords; i++) fIFifoWord[i]=0x30000010 + i; // 805306384+i;
}
+//______________________________________________________________________
+AliITSRawStreamSDD::AliITSRawStreamSDD(const AliITSRawStreamSDD& rs) :
+AliITSRawStream(rs.fRawReader),
+fDDLModuleMap(rs.fDDLModuleMap),
+fData(0),
+fEventId(0),
+fCarlosId(-1),
+fChannel(0),
+fJitter(0),
+fNCarlos(kModulesPerDDL),
+fDDL(0),
+fEndWords(0),
+fResetSkip(0)
+{
+ // copy constructor
+ AliError("Copy constructor should not be used.");
+}
+//__________________________________________________________________________
+AliITSRawStreamSDD& AliITSRawStreamSDD::operator=(const AliITSRawStreamSDD& rs) {
+ // assignment operator
+ if (this!=&rs) {}
+ AliError("Assignment opertator should not be used.");
+ return *this;
+}
+//______________________________________________________________________
+AliITSRawStreamSDD::~AliITSRawStreamSDD(){
+ if(fDDLModuleMap) delete fDDLModuleMap;
+}
+//______________________________________________________________________
+UInt_t AliITSRawStreamSDD::ReadBits()
+{
+// read bits from the given channel
+ UInt_t result = (fChannelData[fCarlosId][fChannel] & ((1<<fReadBits[fCarlosId][fChannel]) - 1));
+ fChannelData[fCarlosId][fChannel] >>= fReadBits[fCarlosId][fChannel];
+ fLastBit[fCarlosId][fChannel] -= fReadBits[fCarlosId][fChannel];
+ return result;
+}
+
+//______________________________________________________________________
+Int_t AliITSRawStreamSDD::DecompAmbra(Int_t value) const
+{
+ // AMBRA decompression (from 8 to 10 bit)
+
+ if ((value & 0x80) == 0) {
+ return value & 0x7f;
+ } else if ((value & 0x40) == 0) {
+ return 0x081 + ((value & 0x3f) << 1);
+ } else if ((value & 0x20) == 0) {
+ return 0x104 + ((value & 0x1f) << 3);
+ } else {
+ return 0x208 + ((value & 0x1f) << 4);
+ }
+
+}
+
+//______________________________________________________________________
Bool_t AliITSRawStreamSDD::Next()
{
// read the next raw digit
// returns kFALSE if there is no digit left
+// returns kTRUE and fCompletedModule=kFALSE when a digit is found
+// returns kTRUE and fCompletedModule=kTRUE when a module is completed (=3x3FFFFFFF footer words)
fPrevModuleID = fModuleID;
- if (!fRawReader.ReadNextInt(fData)) return kFALSE;
+ fDDL=fRawReader->GetDDLID();
+ Int_t ddln = fRawReader->GetDDLID();
+ if(ddln <0) ddln=0;
+ fCompletedModule=kFALSE;
+
+ while (kTRUE) {
+ if(fResetSkip==0){
+ Bool_t kSkip = SkipHeaderWord();
+ fResetSkip=1;
+ if(!kSkip) return kSkip;
+ }
- UInt_t relModuleID = (fData >> 25) & 0x0000007F;
- fModuleID = kDDLModuleMap[fRawReader.GetDDLID()][relModuleID];
- fCoord1 = (fData >> 16) & 0x000001FF;
- fCoord2 = (fData >> 8) & 0x000000FF;
- fSignal = fData & 0x000000FF;
+ if ((fChannel < 0) || (fCarlosId < 0) || (fChannel >= 2) || (fCarlosId >= kModulesPerDDL) || (fLastBit[fCarlosId][fChannel] < fReadBits[fCarlosId][fChannel]) ) {
+ if (!fRawReader->ReadNextInt(fData)) return kFALSE; // read next word
+ ddln = fRawReader->GetDDLID();
+ if(ddln!=fDDL) {
+ Reset();
+ fDDL=fRawReader->GetDDLID();
+ }
+ if(ddln < 0 || ddln > (kDDLsNumber-1)) ddln = 0;
+
+ fChannel = -1;
+ if((fData >> 16) == 0x7F00){ // jitter word
+ fResetSkip=0;
+ fEndWords=0;
+ continue;
+ }
+
+ UInt_t nData28= fData >> 28;
+ UInt_t nData30= fData >> 30;
+
- return kTRUE;
+ if (nData28== 0x02) { // header
+ fEventId = (fData >> 3) & 0x07FF;
+ } else if (nData28== 0x04) {
+ // JTAG word -- do nothing
+ } else if (nData28== 0x03) { // Carlos and FIFO words or Footers
+ if(fData>=fICarlosWord[0]&&fData<=fICarlosWord[11]) { // Carlos Word
+ if(fEndWords==12) continue; // out of event
+ fCarlosId = fData-fICarlosWord[0];
+ Int_t iFifoIdx = fCarlosId/3;
+ if(fNCarlos == 8) iFifoIdx=fCarlosId/2;
+ fNfifo[iFifoIdx] = fCarlosId;
+ } else if (fData>=fIFifoWord[0]&&fData<=fIFifoWord[3]){ // FIFO word
+ if(fEndWords==12) continue; // out of event
+ fCarlosId = fNfifo[fData-fIFifoWord[0]];
+ } else if(fData==0x3FFFFFFF){ // Carlos footer
+ if(fCarlosId>=0 && fCarlosId<kModulesPerDDL){
+ fICountFoot[fCarlosId]++; // stop before the last word (last word=jitter)
+ if(fICountFoot[fCarlosId]==3){
+ fCompletedModule=kTRUE;
+ // printf("Completed module %d DDL %d\n",fCarlosId,ddln);
+ return kTRUE;
+ }
+ }
+ } else if(fData==0x3F1F1F1F){ // CarlosRX footer
+ fEndWords++;
+ if(fEndWords<=12) continue;
+ }else{
+ fRawReader->AddMajorErrorLog(kDataError,"Too many footers");
+ AliWarning(Form("invalid data: too many footers\n", fData));
+ return kFALSE;
+ }
+ } else if (nData30 == 0x02 || nData30 == 0x03) {
+ fChannel = nData30-2;
+ if(fCarlosId>=0 && fChannel>=0 && fCarlosId <kModulesPerDDL && fChannel<2){
+ fChannelData[fCarlosId][fChannel] +=
+ (ULong64_t(fData & 0x3FFFFFFF) << fLastBit[fCarlosId][fChannel]);
+ fLastBit[fCarlosId][fChannel] += 30;
+ }
+ } else { // unknown data format
+ fRawReader->AddMajorErrorLog(kDataFormatErr,Form("Invalid data %8.8x",fData));
+ AliWarning(Form("invalid data: %8.8x\n", fData));
+ return kFALSE;
+ }
+
+ if (fNCarlos == 8 && fCarlosId >= 8) continue; // old data, fNCarlos = 8;
+ if(fCarlosId>=0 && fCarlosId <kModulesPerDDL){
+ fModuleID = GetModuleNumber(ddln,fCarlosId);
+ }
+ } else { // decode data
+ if (fReadCode[fCarlosId][fChannel]) {// read the next code word
+ fChannelCode[fCarlosId][fChannel] = ReadBits();
+ fReadCode[fCarlosId][fChannel] = kFALSE;
+ fReadBits[fCarlosId][fChannel] = fgkCodeLength[fChannelCode[fCarlosId][fChannel]];
+ } else { // read the next data word
+ UInt_t data = ReadBits();
+ fReadCode[fCarlosId][fChannel] = kTRUE;
+ fReadBits[fCarlosId][fChannel] = 3;
+ if (fChannelCode[fCarlosId][fChannel] == 0) { // set the time bin
+ fTimeBin[fCarlosId][fChannel] = data;
+ } else if (fChannelCode[fCarlosId][fChannel] == 1) { // next anode
+ fTimeBin[fCarlosId][fChannel] = 0;
+ fAnode[fCarlosId][fChannel]++;
+ } else { // ADC signal data
+ fSignal = DecompAmbra(data + (1 << fChannelCode[fCarlosId][fChannel]) + fLowThresholdArray[fModuleID-kSPDModules][fChannel]);
+ fCoord1 = fAnode[fCarlosId][fChannel];
+ fCoord2 = fTimeBin[fCarlosId][fChannel];
+ fTimeBin[fCarlosId][fChannel]++;
+ //printf("Data read, Module=%d , Anode=%d , Time=%d , Charge=%d\n",fModuleID,fCoord1,fCoord2,fSignal);
+ return kTRUE;
+ }
+ }
+ }
+ }
+ return kFALSE;
}
+
+//______________________________________________________________________
+void AliITSRawStreamSDD::Reset(){
+
+ //reset data member for a new ddl
+ for(Int_t i=0;i<2;i++){
+ for(Int_t ic=0;ic<kModulesPerDDL;ic++){
+ fChannelData[ic][i]=0;
+ fLastBit[ic][i]=0;
+ fChannelCode[ic][i]=0;
+ fReadCode[ic][i]=kTRUE;
+ fReadBits[ic][i]=3;
+ fTimeBin[ic][i]=0;
+ fAnode[ic][i]=0;
+ }
+ fLowThreshold[i]=0;
+ }
+ for(Int_t i=0;i<kModulesPerDDL;i++) fICountFoot[i]=0;
+}
+
+//______________________________________________________________________
+Bool_t AliITSRawStreamSDD::SkipHeaderWord(){
+ // skip the 1 DDL header word = 0xffffffff
+ while (kTRUE) {
+ if (!fRawReader->ReadNextInt(fData)) return kFALSE;
+ if ((fData >> 30) == 0x01) continue; // JTAG word
+ if(fData==0xFFFFFFFF) return kTRUE;
+ }
+}
+
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