* about the suitability of this software for any purpose. It is *
* provided "as is" without express or implied warranty. *
**************************************************************************/
-
/* $Id$ */
-
+/** @file AliFMDAltroMapping.cxx
+ @author Christian Holm Christensen <cholm@nbi.dk>
+ @date Sun Mar 26 18:27:56 2006
+ @brief Map HW to detector
+*/
//____________________________________________________________________
//
// Mapping of ALTRO hardware channel to detector coordinates
//
+// The hardware address consist of a DDL number and 12bits of ALTRO
+// addresses. The ALTRO address are formatted as follows.
+//
+// 12 7 4 0
+// |---------------|---------|------------|
+// | Board # | ALTRO # | Channel # |
+// +---------------+---------+------------+
+//
+// The mapping is done purely by calculations. In the future,
+// however, we may need some hard-coded stuff, or an external file to
+// read from.
+//
#include "AliFMDAltroMapping.h" // ALIFMDALTROMAPPING_H
#include "AliFMDParameters.h"
#include "AliLog.h"
// Translate a hardware address to detector coordinates.
// The detector is simply
//
- // ddl - kBaseDDL + 1
+ // ddl + 1
//
// The ring number, sector, and strip number is given by the addr
// argument. The address argument, has the following format
// +-------------+----------+----------+
//
// The board number identifier among other things the ring. There's
- // up to 4 boards per DDL, and the two first (0 and 1) corresponds
- // to the inner rings, while the two last (2 and 3) corresponds to
+ // up to 4 boards per DDL, and the two first (0 and 16) corresponds
+ // to the inner rings, while the two last (1 and 17) corresponds to
// the outer rings.
//
// The board number and ALTRO number together identifies the sensor,
// us detector coordinates, unique at least up a 128 strips. We
// return the first strip in the given range.
//
- det = (ddl - AliFMDParameters::kBaseDDL) + 1;
+ det = ddl + 1;
UInt_t board = (addr >> 7) & 0x1F;
UInt_t altro = (addr >> 4) & 0x7;
UInt_t chan = (addr & 0xf);
- if (board > 3) {
- AliError(Form("Invalid board address %d for the FMD", board));
- return kFALSE;
- }
- if (altro > 2) {
- AliError(Form("Invalid ALTRO address %d for the FMD digitizer %d",
- altro, board));
- return kFALSE;
+ ring = (board % 2) == 0 ? 'I' : 'O';
+ switch (ring) {
+ case 'i':
+ case 'I':
+ sec = ((board / 16) * 10 + (altro < 1 ? 0 : altro < 2 ? 4 : 6)
+ + 2 * (chan / 8) + chan % 2);
+ str = ((chan % 8) / 2) * 128;
+ break;
+ case 'o':
+ case 'O':
+ sec = ((board / 16) * 20 + (altro < 1 ? 0 : altro < 2 ? 8 : 12)
+ + 2 * (chan / 4) + chan % 2);
+ str = ((chan % 4) / 2) * 128;
+ break;
}
- ring = (board > 1 ? 'O' : 'I');
- UInt_t nsen = (ring == 'I' ? 10 : 20);
- UInt_t nsa = (ring == 'I' ? 2 : 4); // Sensors per ALTRO
- UInt_t ncs = (ring == 'I' ? 8 : 4); // Channels per sensor
- UInt_t sen = (board % 2) * nsen / 2; // Base for half-ring
- sen += chan / ncs + (altro == 0 ? 0 :
- altro == 1 ? nsa : UInt_t(1.5 * nsa));
- sec = 2 * sen + (chan % 2);
- str = (chan % ncs) / 2 * 128;
return kTRUE;
}
// Translate detector coordinates to a hardware address.
// The ddl is simply
//
- // kBaseDDL + (det - 1)
+ // (det - 1)
//
// The ring number, sector, and strip number must be encoded into a
// hardware address. The address argument, will have the following
// +-------------+----------+----------+
//
// The board number is given by the ring and sector. The inner
- // rings board 0 and 1, while the outer are 2 and 3. Which of these
+ // rings board 0 and 16, while the outer are 1 and 17. Which of these
// depends on the sector. The map is
//
// Ring I, sector 0- 9 -> board 0
- // Ring I, sector 10-19 -> board 1
- // Ring O, sector 0-19 -> board 2
- // Ring O, sector 20-39 -> board 3
+ // Ring I, sector 10-19 -> board 16
+ // Ring O, sector 0-19 -> board 1
+ // Ring O, sector 20-39 -> board 17
//
// There are 3 ALTRO's per board. The ALTRO number is given by the
// sector number. For the inner rings, these are given by
// With this information, we can decode the detector coordinates to
// give us a unique hardware address
//
- ddl = AliFMDParameters::kBaseDDL + (det - 1);
- UInt_t nsen = (ring == 'I' ? 10 : 20);
- UInt_t nsa = (ring == 'I' ? 2 : 4); // Sensors per ALTRO
- UInt_t ncs = (ring == 'I' ? 8 : 4); // Channels per sensor
- UInt_t bbase = (ring == 'I' ? 0 : 2);
- UInt_t board = bbase + sec / nsen;
- UInt_t lsec = (sec - (board - bbase) * nsen); // Local sec in half-ring
- UInt_t altro = (lsec < 2 * nsa ? 0 : (lsec < 3 * nsa ? 1 : 2));
- UInt_t sbase = (altro == 0 ? 0 : altro == 1 ? 2 * nsa : 3 * nsa);
- UInt_t chan = (sec % 2) + (lsec-sbase) / 2 * ncs + 2 * (str / 128);
- AliDebug(40, Form("\n"
- " chan = (%d %% 2) + (%d-%d) / %d * %d + 2 * %d / 128\n"
- " = %d + %d + %d = %d",
- sec, lsec, sbase, 2, ncs, str,
- (sec % 2), (lsec - sbase) / 2 * ncs,
- 2 * (str / 128), chan));
+ ddl = (det - 1);
+ UInt_t board = 0;
+ UInt_t altro = 0;
+ UInt_t chan = 0;
+ UInt_t tmp = 0;
+ switch (ring) {
+ case 'I':
+ case 'i':
+ board += (sec / 10) * 16;
+ altro = (sec % 10) < 4 ? 0 : (sec % 10) < 6 ? 1 : 2;
+ tmp = (sec % 10) - (altro == 0 ? 0 : altro == 1 ? 4 : 6);
+ chan = 2 * (str / 128) + (sec % 2) + ((tmp / 2) % 2) * 8;
+ break;
+ case 'O':
+ case 'o':
+ board += (sec / 20) * 20 + 1;
+ altro = (sec % 20) < 8 ? 0 : (sec % 20) < 12 ? 1 : 2;
+ tmp = (sec % 20) - (altro == 0 ? 0 : altro == 1 ? 8 : 12);
+ chan = 2 * (str / 128) + (sec % 2) + ((tmp / 2) % 4) * 4;
+ break;
+ }
addr = chan + (altro << 4) + (board << 7);
return kTRUE;
Char_t ring;
UShort_t sec;
UShort_t str;
- Int_t ddl = AliFMDParameters::kBaseDDL;
+ Int_t ddl = 0;
if (!Hardware2Detector(ddl, hwaddr, det, ring, sec, str)) return -1;
return Int_t(sec);
}
Char_t ring;
UShort_t sec;
UShort_t str;
- Int_t ddl = AliFMDParameters::kBaseDDL;
+ Int_t ddl = 0;
if (!Hardware2Detector(ddl, hwaddr, det, ring, sec, str)) return -1;
return Int_t(str);
}
Char_t ring;
UShort_t sec;
UShort_t str;
- Int_t ddl = AliFMDParameters::kBaseDDL;
+ Int_t ddl = 0;
if (!Hardware2Detector(ddl, hwaddr, det, ring, sec, str)) return -1;
return Int_t(ring);
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff