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),
41 fNCarlos(kModulesPerDDL),
46 // create an object to read ITS SDD raw digits
47 fDDLModuleMap=new AliITSDDLModuleMapSDD();
48 fDDLModuleMap->SetDefaultMap();
50 for(Int_t im=0;im<kSDDModules;im++){
51 fLowThresholdArray[im][0]=0;
52 fLowThresholdArray[im][1]=0;
54 for(Int_t i=0;i<kFifoWords;i++) fNfifo[i]=0;
55 for(Int_t i=0;i<kDDLsNumber;i++) fSkip[i]=0;
57 fRawReader->Select("ITSSDD");
59 for(Short_t i=0; i<kCarlosWords; i++) fICarlosWord[i]=0x30000000 + i; // 805306368+i;
60 for(Short_t i=0; i<kFifoWords; i++) fIFifoWord[i]=0x30000010 + i; // 805306384+i;
63 //______________________________________________________________________
64 AliITSRawStreamSDD::AliITSRawStreamSDD(const AliITSRawStreamSDD& rs) :
65 AliITSRawStream(rs.fRawReader),
66 fDDLModuleMap(rs.fDDLModuleMap),
72 fNCarlos(kModulesPerDDL),
78 AliError("Copy constructor should not be used.");
80 //__________________________________________________________________________
81 AliITSRawStreamSDD& AliITSRawStreamSDD::operator=(const AliITSRawStreamSDD& rs) {
82 // assignment operator
84 AliError("Assignment opertator should not be used.");
88 //______________________________________________________________________
89 AliITSRawStreamSDD::~AliITSRawStreamSDD(){
90 if(fDDLModuleMap) delete fDDLModuleMap;
92 //______________________________________________________________________
93 UInt_t AliITSRawStreamSDD::ReadBits()
95 // read bits from the given channel
96 UInt_t result = (fChannelData[fCarlosId][fChannel] & ((1<<fReadBits[fCarlosId][fChannel]) - 1));
97 fChannelData[fCarlosId][fChannel] >>= fReadBits[fCarlosId][fChannel];
98 fLastBit[fCarlosId][fChannel] -= fReadBits[fCarlosId][fChannel];
102 //______________________________________________________________________
103 Int_t AliITSRawStreamSDD::DecompAmbra(Int_t value) const
105 // AMBRA decompression (from 8 to 10 bit)
107 if ((value & 0x80) == 0) {
109 } else if ((value & 0x40) == 0) {
110 return 0x081 + ((value & 0x3f) << 1);
111 } else if ((value & 0x20) == 0) {
112 return 0x104 + ((value & 0x1f) << 3);
114 return 0x208 + ((value & 0x1f) << 4);
119 //______________________________________________________________________
120 Bool_t AliITSRawStreamSDD::Next()
122 // read the next raw digit
123 // returns kFALSE if there is no digit left
124 // returns kTRUE and fCompletedModule=kFALSE when a digit is found
125 // returns kTRUE and fCompletedModule=kTRUE when a module is completed (=3x3FFFFFFF footer words)
127 fPrevModuleID = fModuleID;
128 fDDL=fRawReader->GetDDLID();
129 Int_t ddln = fRawReader->GetDDLID();
131 fCompletedModule=kFALSE;
135 Bool_t kSkip = SkipHeaderWord();
137 if(!kSkip) return kSkip;
140 if ((fChannel < 0) || (fCarlosId < 0) || (fChannel >= 2) || (fCarlosId >= kModulesPerDDL) || (fLastBit[fCarlosId][fChannel] < fReadBits[fCarlosId][fChannel]) ) {
141 if (!fRawReader->ReadNextInt(fData)) return kFALSE; // read next word
142 ddln = fRawReader->GetDDLID();
145 fDDL=fRawReader->GetDDLID();
147 if(ddln < 0 || ddln > (kDDLsNumber-1)) ddln = 0;
150 if((fData >> 16) == 0x7F00){ // jitter word
156 UInt_t nData28= fData >> 28;
157 UInt_t nData30= fData >> 30;
160 if (nData28== 0x02) { // header
161 fEventId = (fData >> 3) & 0x07FF;
162 } else if (nData28== 0x04) {
163 // JTAG word -- do nothing
164 } else if (nData28== 0x03) { // Carlos and FIFO words or Footers
165 if(fData>=fICarlosWord[0]&&fData<=fICarlosWord[11]) { // Carlos Word
166 if(fEndWords==12) continue; // out of event
167 fCarlosId = fData-fICarlosWord[0];
168 Int_t iFifoIdx = fCarlosId/3;
169 if(fNCarlos == 8) iFifoIdx=fCarlosId/2;
170 fNfifo[iFifoIdx] = fCarlosId;
171 } else if (fData>=fIFifoWord[0]&&fData<=fIFifoWord[3]){ // FIFO word
172 if(fEndWords==12) continue; // out of event
173 fCarlosId = fNfifo[fData-fIFifoWord[0]];
174 } else if(fData==0x3FFFFFFF){ // Carlos footer
175 if(fCarlosId>=0 && fCarlosId<kModulesPerDDL){
176 fICountFoot[fCarlosId]++; // stop before the last word (last word=jitter)
177 if(fICountFoot[fCarlosId]==3){
178 fCompletedModule=kTRUE;
179 // printf("Completed module %d DDL %d\n",fCarlosId,ddln);
183 } else if(fData==0x3F1F1F1F){ // CarlosRX footer
185 if(fEndWords<=12) continue;
187 fRawReader->AddMajorErrorLog(kDataError,"Too many footers");
188 AliWarning(Form("invalid data: too many footers\n", fData));
191 } else if (nData30 == 0x02 || nData30 == 0x03) {
192 fChannel = nData30-2;
193 if(fCarlosId>=0 && fChannel>=0 && fCarlosId <kModulesPerDDL && fChannel<2){
194 fChannelData[fCarlosId][fChannel] +=
195 (ULong64_t(fData & 0x3FFFFFFF) << fLastBit[fCarlosId][fChannel]);
196 fLastBit[fCarlosId][fChannel] += 30;
198 } else { // unknown data format
199 fRawReader->AddMajorErrorLog(kDataFormatErr,Form("Invalid data %8.8x",fData));
200 AliWarning(Form("invalid data: %8.8x\n", fData));
204 if (fNCarlos == 8 && fCarlosId >= 8) continue; // old data, fNCarlos = 8;
205 if(fCarlosId>=0 && fCarlosId <kModulesPerDDL){
206 fModuleID = GetModuleNumber(ddln,fCarlosId);
208 } else { // decode data
209 if (fReadCode[fCarlosId][fChannel]) {// read the next code word
210 fChannelCode[fCarlosId][fChannel] = ReadBits();
211 fReadCode[fCarlosId][fChannel] = kFALSE;
212 fReadBits[fCarlosId][fChannel] = fgkCodeLength[fChannelCode[fCarlosId][fChannel]];
213 } else { // read the next data word
214 UInt_t data = ReadBits();
215 fReadCode[fCarlosId][fChannel] = kTRUE;
216 fReadBits[fCarlosId][fChannel] = 3;
217 if (fChannelCode[fCarlosId][fChannel] == 0) { // set the time bin
218 fTimeBin[fCarlosId][fChannel] = data;
219 } else if (fChannelCode[fCarlosId][fChannel] == 1) { // next anode
220 fTimeBin[fCarlosId][fChannel] = 0;
221 fAnode[fCarlosId][fChannel]++;
222 } else { // ADC signal data
223 fSignal = DecompAmbra(data + (1 << fChannelCode[fCarlosId][fChannel]) + fLowThresholdArray[fModuleID-kSPDModules][fChannel]);
224 fCoord1 = fAnode[fCarlosId][fChannel];
225 fCoord2 = fTimeBin[fCarlosId][fChannel];
226 fTimeBin[fCarlosId][fChannel]++;
227 //printf("Data read, Module=%d , Anode=%d , Time=%d , Charge=%d\n",fModuleID,fCoord1,fCoord2,fSignal);
236 //______________________________________________________________________
237 void AliITSRawStreamSDD::Reset(){
239 //reset data member for a new ddl
240 for(Int_t i=0;i<2;i++){
241 for(Int_t ic=0;ic<kModulesPerDDL;ic++){
242 fChannelData[ic][i]=0;
244 fChannelCode[ic][i]=0;
245 fReadCode[ic][i]=kTRUE;
252 for(Int_t i=0;i<kModulesPerDDL;i++) fICountFoot[i]=0;
255 //______________________________________________________________________
256 Bool_t AliITSRawStreamSDD::SkipHeaderWord(){
257 // skip the 1 DDL header word = 0xffffffff
259 if (!fRawReader->ReadNextInt(fData)) return kFALSE;
260 if ((fData >> 30) == 0x01) continue; // JTAG word
261 if(fData==0xFFFFFFFF) return kTRUE;