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16 /** @file AliFMDAltroMapping.cxx
17 @author Christian Holm Christensen <cholm@nbi.dk>
18 @date Sun Mar 26 18:27:56 2006
19 @brief Map HW to detector
21 //____________________________________________________________________
23 // Mapping of ALTRO hardware channel to detector coordinates
25 // The hardware address consist of a DDL number and 12bits of ALTRO
26 // addresses. The ALTRO address are formatted as follows.
29 // |---------------|---------|------------|
30 // | Board # | ALTRO # | Channel # |
31 // +---------------+---------+------------+
35 #include "AliFMDAltroMapping.h" // ALIFMDALTROMAPPING_H
36 #include "AliFMDParameters.h"
39 //____________________________________________________________________
40 ClassImp(AliFMDAltroMapping)
42 ; // This is here to keep Emacs for indenting the next line
45 //_____________________________________________________________________________
46 AliFMDAltroMapping::AliFMDAltroMapping()
52 //_____________________________________________________________________________
54 AliFMDAltroMapping::ReadMapping()
56 // Read map from file - not used
60 //_____________________________________________________________________________
62 AliFMDAltroMapping::DeleteMappingArrays()
64 // Clear map in memory
67 //____________________________________________________________________
69 AliFMDAltroMapping::Hardware2Detector(UInt_t ddl, UInt_t addr,
70 UShort_t& det, Char_t& ring,
71 UShort_t& sec, UShort_t& str) const
73 // Translate a hardware address to detector coordinates.
74 // The detector is simply
78 // The ring number, sector, and strip number is given by the addr
79 // argument. The address argument, has the following format
82 // +-------------+----------+----------+
83 // | Board | ALTRO | Channel |
84 // +-------------+----------+----------+
86 // The board number identifier among other things the ring. There's
87 // up to 4 boards per DDL, and the two first (0 and 1) corresponds
88 // to the inner rings, while the two last (2 and 3) corresponds to
91 // The board number and ALTRO number together identifies the sensor,
92 // and hence. The lower board number (0 or 2) are the first N / 2
93 // sensors (where N is the number of sensors in the ring).
95 // There are 3 ALTRO's per card, and each ALTRO serves up to 4
96 // sensors. Which of sensor is determined by the channel number.
97 // For the inner rings, the map is
99 // ALTRO 0, Channel 0 to 7 -> Sensor 0 or 5
100 // ALTRO 0, Channel 8 to 15 -> Sensor 1 or 6
101 // ALTRO 1, Channel 0 to 7 -> Sensor 2 or 7
102 // ALTRO 2, Channel 0 to 7 -> Sensor 3 or 8
103 // ALTRO 2, Channel 8 to 15 -> Sensor 4 or 9
105 // For the outer rings, the map is
107 // ALTRO 0, Channel 0 to 3 -> Sensor 0 or 10
108 // ALTRO 0, Channel 4 to 7 -> Sensor 1 or 11
109 // ALTRO 0, Channel 8 to 11 -> Sensor 2 or 12
110 // ALTRO 0, Channel 12 to 15 -> Sensor 3 or 13
111 // ALTRO 1, Channel 0 to 3 -> Sensor 4 or 14
112 // ALTRO 1, Channel 4 to 7 -> Sensor 5 or 15
113 // ALTRO 2, Channel 0 to 3 -> Sensor 6 or 16
114 // ALTRO 2, Channel 4 to 7 -> Sensor 7 or 17
115 // ALTRO 2, Channel 8 to 11 -> Sensor 8 or 18
116 // ALTRO 2, Channel 12 to 15 -> Sensor 9 or 19
118 // Which divison of the sensor we're in, depends on the channel
119 // number only. For the inner rings, the map is
121 // Channel 0 -> Sector 0, strips 0-127
122 // Channel 1 -> Sector 1, strips 0-127
123 // Channel 3 -> Sector 0, strips 128-255
124 // Channel 4 -> Sector 1, strips 128-255
125 // Channel 5 -> Sector 0, strips 256-383
126 // Channel 6 -> Sector 1, strips 256-383
127 // Channel 7 -> Sector 0, strips 384-511
128 // Channel 8 -> Sector 1, strips 384-511
130 // There are only half as many strips in the outer sensors, so there
131 // only 4 channels are used for a full sensor. The map is
133 // Channel 0 -> Sector 0, strips 0-127
134 // Channel 1 -> Sector 1, strips 0-127
135 // Channel 3 -> Sector 0, strips 128-255
136 // Channel 4 -> Sector 1, strips 128-255
138 // With this information, we can decode the hardware address to give
139 // us detector coordinates, unique at least up a 128 strips. We
140 // return the first strip in the given range.
142 det = (ddl - AliFMDParameters::kBaseDDL) + 1;
143 UInt_t board = (addr >> 7) & 0x1F;
144 UInt_t altro = (addr >> 4) & 0x7;
145 UInt_t chan = (addr & 0xf);
147 AliError(Form("Invalid board address %d for the FMD", board));
151 AliError(Form("Invalid ALTRO address %d for the FMD digitizer %d",
155 ring = (board > 1 ? 'O' : 'I');
156 UInt_t nsen = (ring == 'I' ? 10 : 20);
157 UInt_t nsa = (ring == 'I' ? 2 : 4); // Sensors per ALTRO
158 UInt_t ncs = (ring == 'I' ? 8 : 4); // Channels per sensor
159 UInt_t sen = (board % 2) * nsen / 2; // Base for half-ring
160 sen += chan / ncs + (altro == 0 ? 0 :
161 altro == 1 ? nsa : UInt_t(1.5 * nsa));
162 sec = 2 * sen + (chan % 2);
163 str = (chan % ncs) / 2 * 128;
167 //____________________________________________________________________
169 AliFMDAltroMapping::Detector2Hardware(UShort_t det, Char_t ring,
170 UShort_t sec, UShort_t str,
171 UInt_t& ddl, UInt_t& addr) const
173 // Translate detector coordinates to a hardware address.
176 // kBaseDDL + (det - 1)
178 // The ring number, sector, and strip number must be encoded into a
179 // hardware address. The address argument, will have the following
183 // +-------------+----------+----------+
184 // | Board | ALTRO | Channel |
185 // +-------------+----------+----------+
187 // The board number is given by the ring and sector. The inner
188 // rings board 0 and 1, while the outer are 2 and 3. Which of these
189 // depends on the sector. The map is
191 // Ring I, sector 0- 9 -> board 0
192 // Ring I, sector 10-19 -> board 1
193 // Ring O, sector 0-19 -> board 2
194 // Ring O, sector 20-39 -> board 3
196 // There are 3 ALTRO's per board. The ALTRO number is given by the
197 // sector number. For the inner rings, these are given by
199 // Sector 0- 3 or 10-13 -> ALTRO 0
200 // Sector 4- 5 or 14-15 -> ALTRO 1
201 // Sector 6- 9 or 16-19 -> ALTRO 2
203 // For the outers, it's given by
205 // Sector 0- 7 or 20-27 -> ALTRO 0
206 // Sector 8-11 or 28-31 -> ALTRO 1
207 // Sector 12-19 or 32-39 -> ALTRO 2
209 // The channel number is given by the sector and strip number. For
210 // the inners, the map is
212 // Sector 0, strips 0-127 -> Channel 0
213 // Sector 0, strips 128-255 -> Channel 2
214 // Sector 0, strips 256-383 -> Channel 4
215 // Sector 0, strips 384-511 -> Channel 6
216 // Sector 1, strips 0-127 -> Channel 1
217 // Sector 1, strips 128-255 -> Channel 3
218 // Sector 1, strips 256-383 -> Channel 5
219 // Sector 1, strips 384-511 -> Channel 7
220 // Sector 2, strips 0-127 -> Channel 8
221 // Sector 2, strips 128-255 -> Channel 10
222 // Sector 2, strips 256-383 -> Channel 12
223 // Sector 2, strips 384-511 -> Channel 14
224 // Sector 3, strips 0-127 -> Channel 9
225 // Sector 3, strips 128-255 -> Channel 11
226 // Sector 3, strips 256-383 -> Channel 13
227 // Sector 3, strips 384-511 -> Channel 15
229 // and so on, up to sector 19. For the outer, the map is
231 // Sector 0, strips 0-127 -> Channel 0
232 // Sector 0, strips 128-255 -> Channel 2
233 // Sector 1, strips 0-127 -> Channel 1
234 // Sector 1, strips 128-255 -> Channel 3
235 // Sector 2, strips 0-127 -> Channel 4
236 // Sector 2, strips 128-255 -> Channel 6
237 // Sector 3, strips 0-127 -> Channel 5
238 // Sector 3, strips 128-255 -> Channel 7
239 // Sector 4, strips 0-127 -> Channel 8
240 // Sector 4, strips 128-255 -> Channel 10
241 // Sector 5, strips 0-127 -> Channel 9
242 // Sector 5, strips 128-255 -> Channel 11
243 // Sector 6, strips 0-127 -> Channel 12
244 // Sector 6, strips 128-255 -> Channel 14
245 // Sector 7, strips 0-127 -> Channel 13
246 // Sector 7, strips 128-255 -> Channel 15
248 // and so on upto sector 40.
250 // With this information, we can decode the detector coordinates to
251 // give us a unique hardware address
253 ddl = AliFMDParameters::kBaseDDL + (det - 1);
254 UInt_t nsen = (ring == 'I' ? 10 : 20);
255 UInt_t nsa = (ring == 'I' ? 2 : 4); // Sensors per ALTRO
256 UInt_t ncs = (ring == 'I' ? 8 : 4); // Channels per sensor
257 UInt_t bbase = (ring == 'I' ? 0 : 2);
258 UInt_t board = bbase + sec / nsen;
259 UInt_t lsec = (sec - (board - bbase) * nsen); // Local sec in half-ring
260 UInt_t altro = (lsec < 2 * nsa ? 0 : (lsec < 3 * nsa ? 1 : 2));
261 UInt_t sbase = (altro == 0 ? 0 : altro == 1 ? 2 * nsa : 3 * nsa);
262 UInt_t chan = (sec % 2) + (lsec-sbase) / 2 * ncs + 2 * (str / 128);
263 AliDebug(40, Form("\n"
264 " chan = (%d %% 2) + (%d-%d) / %d * %d + 2 * %d / 128\n"
265 " = %d + %d + %d = %d",
266 sec, lsec, sbase, 2, ncs, str,
267 (sec % 2), (lsec - sbase) / 2 * ncs,
268 2 * (str / 128), chan));
269 addr = chan + (altro << 4) + (board << 7);
274 //____________________________________________________________________
276 AliFMDAltroMapping::GetHWAddress(Int_t sec, Int_t str, Int_t ring) const
278 // Return hardware address corresponding to sector sec, strip str,
279 // and ring ring. Mapping from TPC to FMD coordinates are
288 Char_t r = Char_t(ring);
289 if (!Detector2Hardware(1, r, sec, str, ddl, hwaddr))
294 //____________________________________________________________________
296 AliFMDAltroMapping::GetPadRow(Int_t hwaddr) const
298 // Return sector corresponding to hardware address hwaddr. Mapping
299 // from TPC to FMD coordinates are
311 Int_t ddl = AliFMDParameters::kBaseDDL;
312 if (!Hardware2Detector(ddl, hwaddr, det, ring, sec, str)) return -1;
316 //____________________________________________________________________
318 AliFMDAltroMapping::GetPad(Int_t hwaddr) const
320 // Return strip corresponding to hardware address hwaddr. Mapping
321 // from TPC to FMD coordinates are
333 Int_t ddl = AliFMDParameters::kBaseDDL;
334 if (!Hardware2Detector(ddl, hwaddr, det, ring, sec, str)) return -1;
338 //____________________________________________________________________
340 AliFMDAltroMapping::GetSector(Int_t hwaddr) const
342 // Return ring corresponding to hardware address hwaddr. Mapping
343 // from TPC to FMD coordinates are
355 Int_t ddl = AliFMDParameters::kBaseDDL;
356 if (!Hardware2Detector(ddl, hwaddr, det, ring, sec, str)) return -1;
360 //_____________________________________________________________________________