1 /**************************************************************************
2 * Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////////////
20 /// This class provides access to ITS SDD digits in raw data.
22 ///////////////////////////////////////////////////////////////////////////////
24 #include "AliITSRawStreamSDD.h"
25 #include "AliRawReader.h"
28 ClassImp(AliITSRawStreamSDD)
30 const UInt_t AliITSRawStreamSDD::fgkCodeLength[8] = {8, 18, 2, 3, 4, 5, 6, 7};
32 //______________________________________________________________________
33 AliITSRawStreamSDD::AliITSRawStreamSDD(AliRawReader* rawReader) :
34 AliITSRawStream(rawReader),
43 fDecompressAmbra(kTRUE)
45 // create an object to read ITS SDD raw digits
46 fDDLModuleMap=new AliITSDDLModuleMapSDD();
47 fDDLModuleMap->SetDefaultMap();
49 for(Int_t im=0;im<kSDDModules;im++){
50 fLowThresholdArray[im][0]=0;
51 fLowThresholdArray[im][1]=0;
53 for(Int_t i=0;i<kFifoWords;i++) fNfifo[i]=0;
54 for(Int_t i=0;i<kDDLsNumber;i++) fSkip[i]=0;
56 fRawReader->Select("ITSSDD");
58 for(Short_t i=0; i<kCarlosWords; i++) fICarlosWord[i]=0x30000000 + i; // 805306368+i;
59 for(Short_t i=0; i<kFifoWords; i++) fIFifoWord[i]=0x30000010 + i; // 805306384+i;
62 //______________________________________________________________________
63 AliITSRawStreamSDD::AliITSRawStreamSDD(const AliITSRawStreamSDD& rs) :
64 AliITSRawStream(rs.fRawReader),
65 fDDLModuleMap(rs.fDDLModuleMap),
73 fDecompressAmbra(kTRUE)
76 AliError("Copy constructor should not be used.");
78 //__________________________________________________________________________
79 AliITSRawStreamSDD& AliITSRawStreamSDD::operator=(const AliITSRawStreamSDD& rs) {
80 // assignment operator
82 AliError("Assignment opertator should not be used.");
86 //______________________________________________________________________
87 AliITSRawStreamSDD::~AliITSRawStreamSDD(){
88 if(fDDLModuleMap) delete fDDLModuleMap;
90 //______________________________________________________________________
91 UInt_t AliITSRawStreamSDD::ReadBits()
93 // read bits from the given channel
94 UInt_t result = (fChannelData[fCarlosId][fChannel] & ((1<<fReadBits[fCarlosId][fChannel]) - 1));
95 fChannelData[fCarlosId][fChannel] >>= fReadBits[fCarlosId][fChannel];
96 fLastBit[fCarlosId][fChannel] -= fReadBits[fCarlosId][fChannel];
100 //______________________________________________________________________
101 Int_t AliITSRawStreamSDD::DecompAmbra(Int_t value) const
103 // AMBRA decompression (from 8 to 10 bit)
105 if ((value & 0x80) == 0) {
107 } else if ((value & 0x40) == 0) {
108 return 0x081 + ((value & 0x3f) << 1);
109 } else if ((value & 0x20) == 0) {
110 return 0x104 + ((value & 0x1f) << 3);
112 return 0x208 + ((value & 0x1f) << 4);
117 //______________________________________________________________________
118 Bool_t AliITSRawStreamSDD::Next()
120 // read the next raw digit
121 // returns kFALSE if there is no digit left
122 // returns kTRUE and fCompletedModule=kFALSE when a digit is found
123 // returns kTRUE and fCompletedModule=kTRUE when a module is completed (=3x3FFFFFFF footer words)
125 fPrevModuleID = fModuleID;
126 fCompletedModule=kFALSE;
130 Bool_t kSkip = SkipHeaderWord();
132 if(!kSkip) return kSkip;
135 if ((fChannel < 0) || (fCarlosId < 0) || (fChannel >= 2) || (fCarlosId >= kModulesPerDDL) || (fLastBit[fCarlosId][fChannel] < fReadBits[fCarlosId][fChannel]) ) {
136 if (!fRawReader->ReadNextInt(fData)) return kFALSE; // read next word
140 if((fData >> 16) == 0x7F00){ // jitter word
146 UInt_t nData28= fData >> 28;
147 UInt_t nData30= fData >> 30;
150 if (nData28== 0x02) { // header
151 fEventId = (fData >> 3) & 0x07FF;
152 } else if (nData28== 0x03) { // Carlos and FIFO words or Footers
153 if(fData>=fICarlosWord[0]&&fData<=fICarlosWord[11]) { // Carlos Word
154 fCarlosId = fData-fICarlosWord[0];
155 Int_t iFifoIdx = fCarlosId/3;
156 fNfifo[iFifoIdx] = fCarlosId;
157 } else if (fData>=fIFifoWord[0]&&fData<=fIFifoWord[3]){ // FIFO word
158 fCarlosId = fNfifo[fData-fIFifoWord[0]];
159 } else if(fData==0x3FFFFFFF){ // Carlos footer
160 fICountFoot[fCarlosId]++; // stop before the last word (last word=jitter)
161 if(fICountFoot[fCarlosId]==3){
162 fCompletedModule=kTRUE;
165 } else if(fData==0x3F1F1F1F){ // CarlosRX footer
166 // CARLOSRX footer -- do nothing
168 fRawReader->AddMajorErrorLog(kDataError,"Bad footer");
169 AliWarning(Form("Invalid data: bad footer %08X\n", fData));
172 } else if (nData30 == 0x02 || nData30 == 0x03) {
173 fChannel = nData30-2;
174 fChannelData[fCarlosId][fChannel] +=
175 (ULong64_t(fData & 0x3FFFFFFF) << fLastBit[fCarlosId][fChannel]);
176 fLastBit[fCarlosId][fChannel] += 30;
177 } else if (nData28== 0x04) {
178 // JTAG word -- do nothing
179 } else { // unknown data format
180 fRawReader->AddMajorErrorLog(kDataFormatErr,Form("Invalid data %8.8x",fData));
181 AliWarning(Form("Invalid data: %8.8x\n", fData));
185 if(fCarlosId>=0 && fCarlosId <kModulesPerDDL){
186 Int_t nDDL=fRawReader->GetDDLID();
187 fModuleID = GetModuleNumber(nDDL,fCarlosId);
189 } else { // decode data
190 if (fReadCode[fCarlosId][fChannel]) {// read the next code word
191 fChannelCode[fCarlosId][fChannel] = ReadBits();
192 fReadCode[fCarlosId][fChannel] = kFALSE;
193 fReadBits[fCarlosId][fChannel] = fgkCodeLength[fChannelCode[fCarlosId][fChannel]];
194 } else { // read the next data word
195 UInt_t data = ReadBits();
196 fReadCode[fCarlosId][fChannel] = kTRUE;
197 fReadBits[fCarlosId][fChannel] = 3;
198 if (fChannelCode[fCarlosId][fChannel] == 0) { // set the time bin
199 fTimeBin[fCarlosId][fChannel] = data;
200 } else if (fChannelCode[fCarlosId][fChannel] == 1) { // next anode
201 fTimeBin[fCarlosId][fChannel] = 0;
202 fAnode[fCarlosId][fChannel]++;
203 } else { // ADC signal data
204 fEightBitSignal=data + (1 << fChannelCode[fCarlosId][fChannel]);
205 if(fDecompressAmbra) fSignal = DecompAmbra(fEightBitSignal + fLowThresholdArray[fModuleID-kSPDModules][fChannel]);
206 fCoord1 = fAnode[fCarlosId][fChannel];
207 fCoord2 = fTimeBin[fCarlosId][fChannel];
208 fTimeBin[fCarlosId][fChannel]++;
209 //printf("Data read, Module=%d , Anode=%d , Time=%d , Charge=%d\n",fModuleID,fCoord1,fCoord2,fSignal);
218 //______________________________________________________________________
219 void AliITSRawStreamSDD::Reset(){
221 //reset data member for a new ddl
222 for(Int_t i=0;i<2;i++){
223 for(Int_t ic=0;ic<kModulesPerDDL;ic++){
224 fChannelData[ic][i]=0;
226 fChannelCode[ic][i]=0;
227 fReadCode[ic][i]=kTRUE;
233 for(Int_t i=0;i<kModulesPerDDL;i++) fICountFoot[i]=0;
236 //______________________________________________________________________
237 Bool_t AliITSRawStreamSDD::SkipHeaderWord(){
238 // skip the 1 DDL header word = 0xffffffff
240 if (!fRawReader->ReadNextInt(fData)) return kFALSE;
241 if ((fData >> 30) == 0x01) continue; // JTAG word
242 if(fData==0xFFFFFFFF) return kTRUE;