Obsolete.
[u/mrichter/AliRoot.git] / ITS / AliITSRawStreamSDDBeamTest.cxx
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2906f4c2 1/**************************************************************************
e2662f55 2 * Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. *
2906f4c2 3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
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 **************************************************************************/
15
e2662f55 16/* $Id: $*/
2906f4c2 17
18///////////////////////////////////////////////////////////////////////////////
19///
e2662f55 20/// This class provides access to ITS SDD digits in beam test raw data
2906f4c2 21///
22///////////////////////////////////////////////////////////////////////////////
23
e2662f55 24#include "AliLog.h"
25#include "AliITSRawStreamSDDBeamTest.h"
2906f4c2 26#include "AliRawReader.h"
27
2906f4c2 28
e2662f55 29ClassImp(AliITSRawStreamSDDBeamTest)
30
31const UInt_t AliITSRawStreamSDDBeamTest::fgkCodeLength[8] = {8, 18, 2, 3, 4, 5, 6, 7};
2906f4c2 32
e2662f55 33//______________________________________________________________________
34AliITSRawStreamSDDBeamTest::AliITSRawStreamSDDBeamTest(AliRawReader* rawReader) :
35 AliITSRawStream(rawReader),
36fData(0),
37fSkip(0),
38fEventId(0),
39fCarlosId(-1),
40fChannel(0),
41fJitter(0)
2906f4c2 42{
43// create an object to read ITS SDD raw digits
2906f4c2 44 fRawReader->Reset();
1ba0280f 45 fRawReader->SelectEquipment(17, 204, 204);
e2662f55 46
47
48}
49
50//______________________________________________________________________
51UInt_t AliITSRawStreamSDDBeamTest::ReadBits()
52{
53// read bits from the given channel
54 UInt_t result = (fChannelData[fCarlosId][fChannel] & ((1<<fReadBits[fCarlosId][fChannel]) - 1));
55 fChannelData[fCarlosId][fChannel] >>= fReadBits[fCarlosId][fChannel];
56 fLastBit[fCarlosId][fChannel] -= fReadBits[fCarlosId][fChannel];
57 return result;
2906f4c2 58}
59
e2662f55 60//______________________________________________________________________
61Int_t AliITSRawStreamSDDBeamTest::DecompAmbra(Int_t value) const
62{
63 // AMBRA decompression (from 8 to 10 bit)
64
65 if ((value & 0x80) == 0) {
66 return value & 0x7f;
67 } else if ((value & 0x40) == 0) {
68 return 0x081 + ((value & 0x3f) << 1);
69 } else if ((value & 0x20) == 0) {
70 return 0x104 + ((value & 0x1f) << 3);
71 } else {
72 return 0x208 + ((value & 0x1f) << 4);
73 }
74
75}
2906f4c2 76
e2662f55 77//______________________________________________________________________
78Bool_t AliITSRawStreamSDDBeamTest::Next()
2906f4c2 79{
80// read the next raw digit
81// returns kFALSE if there is no digit left
82
83 // skip the first 8 words
e2662f55 84 while (fSkip < 8) {
2906f4c2 85 if (!fRawReader->ReadNextInt(fData)) return kFALSE;
86 if ((fData >> 30) == 0x01) continue; // JTAG word
e2662f55 87 if (fSkip == 4) {
2906f4c2 88 if (fData != 0) {
89 Error("Next", "data not valid: %8.8d", fData);
90 return kFALSE;
91 }
92 }
e2662f55 93 fSkip++;
2906f4c2 94 }
95
96 while (kTRUE) {
a97b3678 97 if ((fChannel < 0) || (fLastBit[0][fChannel] < fReadBits[0][fChannel])) {
2906f4c2 98 if (!fRawReader->ReadNextInt(fData)) return kFALSE; // read next word
99
100 fChannel = -1;
101 if ((fData >> 28) == 0x02) { // header
102 fEventId = (fData >> 3) & 0x07FF;
103 fCarlosId = (fData >> 1) & 0x03;
104 } else if ((fData >> 28) == 0x03) { // footer
105 // ignored
106 } else if ((fData >> 29) == 0x00) { // error
107 if ((fData & 0x1FFFFFFF) != 0) {
108 Error("Next", "error codes = %x, %x\n",
109 (fData >> 0) & 0x3FFF, (fData >> 14) & 0x3FFF);
110 return kFALSE;
111 }
112 } else if ((fData >> 30) == 0x01) { // JTAG word
113 // ignored
114 } else if ((fData >> 30) == 0x02) { // channel 0 data
115 fChannel = 0;
116 } else if ((fData >> 30) == 0x03) { // channel 1 data
117 fChannel = 1;
118 } else { // unknown data format
119 Error("Next", "invalid data: %8.8x\n", fData);
120 return kFALSE;
121 }
122
123 if (fChannel >= 0) { // add read word to the data
a97b3678 124 fChannelData[0][fChannel] +=
125 (ULong64_t(fData & 0x3FFFFFFF) << fLastBit[0][fChannel]);
126 fLastBit[0][fChannel] += 30;
2906f4c2 127 }
128
129 } else { // decode data
a97b3678 130 if (fReadCode[0][fChannel]) { // read the next code word
131 fChannelCode[0][fChannel] = ReadBits();
132 fReadCode[0][fChannel] = kFALSE;
133 fReadBits[0][fChannel] = fgkCodeLength[fChannelCode[0][fChannel]];
2906f4c2 134
135 } else { // read the next data word
136 UInt_t data = ReadBits();
a97b3678 137 fReadCode[0][fChannel] = kTRUE;
138 fReadBits[0][fChannel] = 3;
139 if (fChannelCode[0][fChannel] == 0) { // set the time bin
140 fTimeBin[0][fChannel] = data;
141 } else if (fChannelCode[0][fChannel] == 1) { // next anode
142 fTimeBin[0][fChannel] = 0;
143 fAnode[0][fChannel]++;
2906f4c2 144 } else { // ADC signal data
a97b3678 145 fSignal = DecompAmbra(data + (1 << fChannelCode[0][fChannel]) +
2906f4c2 146 fLowThreshold[fChannel]);
a97b3678 147 fCoord1 = fAnode[0][fChannel];
148 fCoord2 = fTimeBin[0][fChannel];
149 fTimeBin[0][fChannel]++;
2906f4c2 150 return kTRUE;
151 }
152 }
153 }
154 }
155
156 return kFALSE;
157}
158
159
e2662f55 160
161