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 Int_t AliITSRawStreamSDD::fgkDDLModuleMap[kDDLsNumber][kModulesPerDDL] = {
32 {240,241,242,246,247,248,252,253,254,258,259,260},
33 {264,265,266,270,271,272,276,277,278,282,283,284},
34 {288,289,290,294,295,296,300,301,302,306,307,308},
35 {312,313,314,318,319,320,-1,-1,-1,-1,-1,-1},
36 {243,244,245,249,250,251,255,256,257,261,262,263},
37 {267,268,269,273,274,275,279,280,281,285,286,287},
38 {291,292,293,297,298,299,303,304,305,309,310,311},
39 {315,316,317,321,322,323,-1,-1,-1,-1,-1,-1},
40 {324,325,326,327,332,333,334,335,340,341,342,343},
41 {348,349,350,351,356,357,358,359,364,365,366,367},
42 {372,373,374,375,380,381,382,383,388,389,390,391},
43 {396,397,398,399,404,405,406,407,412,413,414,415},
44 {420,421,422,423,428,429,430,431,436,437,438,439},
45 {444,445,446,447,452,453,454,455,460,461,462,463},
46 {468,469,470,471,476,477,478,479,484,485,486,487},
47 {492,493,494,495,-1,-1,-1,-1,-1,-1,-1,-1},
48 {328,329,330,331,336,337,338,339,344,345,346,347},
49 {352,353,354,355,360,361,362,363,368,369,370,371},
50 {376,377,378,379,384,385,386,387,392,393,394,395},
51 {400,401,402,403,408,409,410,411,416,417,418,419},
52 {424,425,426,427,432,433,434,435,440,441,442,443},
53 {448,449,450,451,456,457,458,459,464,465,466,467},
54 {472,473,474,475,480,481,482,483,488,489,490,491},
55 {496,497,498,499,-1,-1,-1,-1,-1,-1,-1,-1}};
57 const UInt_t AliITSRawStreamSDD::fgkCodeLength[8] = {8, 18, 2, 3, 4, 5, 6, 7};
59 AliITSRawStreamSDD::AliITSRawStreamSDD(AliRawReader* rawReader) :
60 AliITSRawStream(rawReader),
66 fNCarlos(kModulesPerDDL),
71 // create an object to read ITS SDD raw digits
74 for(Int_t i=0;i<kFifoWords;i++) fNfifo[i]=0;
75 for(Int_t i=0;i<kDDLsNumber;i++) fSkip[i]=0;
77 fRawReader->Select("ITSSDD");
79 for(Short_t i=0; i<kCarlosWords; i++) fICarlosWord[i]=0x30000000 + i; // 805306368+i;
80 for(Short_t i=0; i<kFifoWords; i++) fIFifoWord[i]=0x30000010 + i; // 805306384+i;
83 UInt_t AliITSRawStreamSDD::ReadBits()
85 // read bits from the given channel
86 UInt_t result = (fChannelData[fCarlosId][fChannel] & ((1<<fReadBits[fCarlosId][fChannel]) - 1));
87 fChannelData[fCarlosId][fChannel] >>= fReadBits[fCarlosId][fChannel];
88 fLastBit[fCarlosId][fChannel] -= fReadBits[fCarlosId][fChannel];
92 Int_t AliITSRawStreamSDD::DecompAmbra(Int_t value) const
94 // AMBRA decompression (from 8 to 10 bit)
96 if ((value & 0x80) == 0) {
98 } else if ((value & 0x40) == 0) {
99 return 0x081 + ((value & 0x3f) << 1);
100 } else if ((value & 0x20) == 0) {
101 return 0x104 + ((value & 0x1f) << 3);
103 return 0x208 + ((value & 0x1f) << 4);
108 Bool_t AliITSRawStreamSDD::Next()
110 // read the next raw digit
111 // returns kFALSE if there is no digit left
112 // returns kTRUE and fCompletedModule=kFALSE when a digit is found
113 // returns kTRUE and fCompletedModule=kTRUE when a module is completed (=3x3FFFFFFF footer words)
115 fPrevModuleID = fModuleID;
116 fDDL=fRawReader->GetDDLID();
117 Int_t ddln = fRawReader->GetDDLID();
119 fCompletedModule=kFALSE;
123 Bool_t kSkip = ResetSkip(ddln);
125 if(!kSkip) return kSkip;
128 if ((fChannel < 0) || (fLastBit[fCarlosId][fChannel] < fReadBits[fCarlosId][fChannel])) {
130 if (!fRawReader->ReadNextInt(fData)) return kFALSE; // read next word
132 ddln = fRawReader->GetDDLID();
135 fDDL=fRawReader->GetDDLID();
137 if(ddln < 0 || ddln > (kDDLsNumber-1)) ddln = 0;
140 if((fData >> 16) == 0x7F00){ // jitter word for data since october 2007
141 for(Int_t i=0;i<kDDLsNumber;i++){fSkip[i]=0;}
147 UInt_t nData28= fData >> 28;
148 UInt_t nData30= fData >> 30;
151 if (nData28== 0x02) { // header
152 fEventId = (fData >> 3) & 0x07FF;
153 } else if (nData28== 0x03) { // Carlos and FIFO words or Footers
154 if(fData>=fICarlosWord[0]&&fData<=fICarlosWord[11]) { // Carlos Word
155 if(fEndWords==12) continue; // out of event
156 fCarlosId = fData-fICarlosWord[0];
157 Int_t iFifoIdx = fCarlosId/3;
158 if(fNCarlos == 8) iFifoIdx=fCarlosId/2;
159 fNfifo[iFifoIdx] = fCarlosId;
160 } else if (fData>=fIFifoWord[0]&&fData<=fIFifoWord[3]){ // FIFO word
161 if(fEndWords==12) continue; // out of event
162 fCarlosId = fNfifo[fData-fIFifoWord[0]];
163 } else if(fData==0x3FFFFFFF){ // Carlos footer
164 fICountFoot[fCarlosId]++; // stop before the last word (last word=jitter)
165 if(fICountFoot[fCarlosId]==3){
166 fCompletedModule=kTRUE;
169 } else if(fData==0x3F1F1F1F){ // CarlosRX footer
171 if(fEndWords<=12) continue;
173 fRawReader->AddMajorErrorLog(kDataError,"Too many footers");
174 AliWarning(Form("invalid data: too many footers\n", fData));
177 } else if (nData30 == 0x02 || nData30 == 0x03) {
178 fChannel = nData30-2;
179 fChannelData[fCarlosId][fChannel] +=
180 (ULong64_t(fData & 0x3FFFFFFF) << fLastBit[fCarlosId][fChannel]);
181 fLastBit[fCarlosId][fChannel] += 30;
182 } else { // unknown data format
183 fRawReader->AddMajorErrorLog(kDataFormatErr,Form("Invalid data %8.8x",fData));
184 AliWarning(Form("invalid data: %8.8x\n", fData));
188 if (fNCarlos == 8 && fCarlosId >= 8) continue; // old data, fNCarlos = 8;
190 fModuleID = fgkDDLModuleMap[fRawReader->GetDDLID()][fCarlosId];
192 } else { // decode data
193 if (fReadCode[fCarlosId][fChannel]) {// read the next code word
194 fChannelCode[fCarlosId][fChannel] = ReadBits();
195 fReadCode[fCarlosId][fChannel] = kFALSE;
196 fReadBits[fCarlosId][fChannel] = fgkCodeLength[fChannelCode[fCarlosId][fChannel]];
197 } else { // read the next data word
198 UInt_t data = ReadBits();
199 fReadCode[fCarlosId][fChannel] = kTRUE;
200 fReadBits[fCarlosId][fChannel] = 3;
201 if (fChannelCode[fCarlosId][fChannel] == 0) { // set the time bin
202 fTimeBin[fCarlosId][fChannel] = data;
203 } else if (fChannelCode[fCarlosId][fChannel] == 1) { // next anode
204 fTimeBin[fCarlosId][fChannel] = 0;
205 fAnode[fCarlosId][fChannel]++;
206 } else { // ADC signal data
207 fSignal = DecompAmbra(data + (1 << fChannelCode[fCarlosId][fChannel]) + fLowThreshold[fChannel]);
208 fCoord1 = fAnode[fCarlosId][fChannel];
209 fCoord2 = fTimeBin[fCarlosId][fChannel];
210 fTimeBin[fCarlosId][fChannel]++;
211 //printf("Data read, Module=%d , Anode=%d , Time=%d , Charge=%d\n",fModuleID,fCoord1,fCoord2,fSignal);
220 void AliITSRawStreamSDD::Reset(){
222 //reset data member for a new ddl
223 for(Int_t i=0;i<2;i++){
224 for(Int_t ic=0;ic<kModulesPerDDL;ic++){
225 fChannelData[ic][i]=0;
227 fChannelCode[ic][i]=0;
228 fReadCode[ic][i]=kTRUE;
235 for(Int_t i=0;i<kModulesPerDDL;i++) fICountFoot[i]=0;
238 Bool_t AliITSRawStreamSDD::ResetSkip(Int_t ddln){
239 // skip the 9 DDL header words
240 Bool_t startCount=kFALSE;
241 while (fSkip[ddln] < 9) {
242 if (!fRawReader->ReadNextInt(fData)) {
245 if(fData==0xFFFFFFFF) startCount=kTRUE;
246 //printf("%x\n",fData);
247 if ((fData >> 30) == 0x01) continue; // JTAG word
248 if(startCount) fSkip[ddln]++;