/************************************************************************** * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * * * * Author: The ALICE Off-line Project. * * Contributors are mentioned in the code where appropriate. * * * * Permission to use, copy, modify and distribute this software and its * * documentation strictly for non-commercial purposes is hereby granted * * without fee, provided that the above copyright notice appears in all * * copies and that both the copyright notice and this permission notice * * appear in the supporting documentation. The authors make no claims * * 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 @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" //____________________________________________________________________ ClassImp(AliFMDAltroMapping) #if 0 ; // This is here to keep Emacs for indenting the next line #endif //_____________________________________________________________________________ AliFMDAltroMapping::AliFMDAltroMapping() { // Constructor } //_____________________________________________________________________________ Bool_t AliFMDAltroMapping::ReadMapping() { // Read map from file - not used return kTRUE; } //_____________________________________________________________________________ void AliFMDAltroMapping::DeleteMappingArrays() { // Clear map in memory } //____________________________________________________________________ Bool_t AliFMDAltroMapping::Hardware2Detector(UInt_t ddl, UInt_t addr, UShort_t& det, Char_t& ring, UShort_t& sec, UShort_t& str) const { // Translate a hardware address to detector coordinates. // The detector is simply // // ddl - kBaseDDL + 1 // // The ring number, sector, and strip number is given by the addr // argument. The address argument, has the following format // // 12 7 4 0 // +-------------+----------+----------+ // | Board | ALTRO | Channel | // +-------------+----------+----------+ // // 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 // the outer rings. // // The board number and ALTRO number together identifies the sensor, // and hence. The lower board number (0 or 2) are the first N / 2 // sensors (where N is the number of sensors in the ring). // // There are 3 ALTRO's per card, and each ALTRO serves up to 4 // sensors. Which of sensor is determined by the channel number. // For the inner rings, the map is // // ALTRO 0, Channel 0 to 7 -> Sensor 0 or 5 // ALTRO 0, Channel 8 to 15 -> Sensor 1 or 6 // ALTRO 1, Channel 0 to 7 -> Sensor 2 or 7 // ALTRO 2, Channel 0 to 7 -> Sensor 3 or 8 // ALTRO 2, Channel 8 to 15 -> Sensor 4 or 9 // // For the outer rings, the map is // // ALTRO 0, Channel 0 to 3 -> Sensor 0 or 10 // ALTRO 0, Channel 4 to 7 -> Sensor 1 or 11 // ALTRO 0, Channel 8 to 11 -> Sensor 2 or 12 // ALTRO 0, Channel 12 to 15 -> Sensor 3 or 13 // ALTRO 1, Channel 0 to 3 -> Sensor 4 or 14 // ALTRO 1, Channel 4 to 7 -> Sensor 5 or 15 // ALTRO 2, Channel 0 to 3 -> Sensor 6 or 16 // ALTRO 2, Channel 4 to 7 -> Sensor 7 or 17 // ALTRO 2, Channel 8 to 11 -> Sensor 8 or 18 // ALTRO 2, Channel 12 to 15 -> Sensor 9 or 19 // // Which divison of the sensor we're in, depends on the channel // number only. For the inner rings, the map is // // Channel 0 -> Sector 0, strips 0-127 // Channel 1 -> Sector 1, strips 0-127 // Channel 3 -> Sector 0, strips 128-255 // Channel 4 -> Sector 1, strips 128-255 // Channel 5 -> Sector 0, strips 256-383 // Channel 6 -> Sector 1, strips 256-383 // Channel 7 -> Sector 0, strips 384-511 // Channel 8 -> Sector 1, strips 384-511 // // There are only half as many strips in the outer sensors, so there // only 4 channels are used for a full sensor. The map is // // Channel 0 -> Sector 0, strips 0-127 // Channel 1 -> Sector 1, strips 0-127 // Channel 3 -> Sector 0, strips 128-255 // Channel 4 -> Sector 1, strips 128-255 // // With this information, we can decode the hardware address to give // us detector coordinates, unique at least up a 128 strips. We // return the first strip in the given range. // det = (ddl - AliFMDParameters::kBaseDDL) + 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 > 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; } //____________________________________________________________________ Bool_t AliFMDAltroMapping::Detector2Hardware(UShort_t det, Char_t ring, UShort_t sec, UShort_t str, UInt_t& ddl, UInt_t& addr) const { // Translate detector coordinates to a hardware address. // The ddl is simply // // kBaseDDL + (det - 1) // // The ring number, sector, and strip number must be encoded into a // hardware address. The address argument, will have the following // format on output // // 12 7 4 0 // +-------------+----------+----------+ // | Board | ALTRO | Channel | // +-------------+----------+----------+ // // 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 // 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 // // There are 3 ALTRO's per board. The ALTRO number is given by the // sector number. For the inner rings, these are given by // // Sector 0- 3 or 10-13 -> ALTRO 0 // Sector 4- 5 or 14-15 -> ALTRO 1 // Sector 6- 9 or 16-19 -> ALTRO 2 // // For the outers, it's given by // // Sector 0- 7 or 20-27 -> ALTRO 0 // Sector 8-11 or 28-31 -> ALTRO 1 // Sector 12-19 or 32-39 -> ALTRO 2 // // The channel number is given by the sector and strip number. For // the inners, the map is // // Sector 0, strips 0-127 -> Channel 0 // Sector 0, strips 128-255 -> Channel 2 // Sector 0, strips 256-383 -> Channel 4 // Sector 0, strips 384-511 -> Channel 6 // Sector 1, strips 0-127 -> Channel 1 // Sector 1, strips 128-255 -> Channel 3 // Sector 1, strips 256-383 -> Channel 5 // Sector 1, strips 384-511 -> Channel 7 // Sector 2, strips 0-127 -> Channel 8 // Sector 2, strips 128-255 -> Channel 10 // Sector 2, strips 256-383 -> Channel 12 // Sector 2, strips 384-511 -> Channel 14 // Sector 3, strips 0-127 -> Channel 9 // Sector 3, strips 128-255 -> Channel 11 // Sector 3, strips 256-383 -> Channel 13 // Sector 3, strips 384-511 -> Channel 15 // // and so on, up to sector 19. For the outer, the map is // // Sector 0, strips 0-127 -> Channel 0 // Sector 0, strips 128-255 -> Channel 2 // Sector 1, strips 0-127 -> Channel 1 // Sector 1, strips 128-255 -> Channel 3 // Sector 2, strips 0-127 -> Channel 4 // Sector 2, strips 128-255 -> Channel 6 // Sector 3, strips 0-127 -> Channel 5 // Sector 3, strips 128-255 -> Channel 7 // Sector 4, strips 0-127 -> Channel 8 // Sector 4, strips 128-255 -> Channel 10 // Sector 5, strips 0-127 -> Channel 9 // Sector 5, strips 128-255 -> Channel 11 // Sector 6, strips 0-127 -> Channel 12 // Sector 6, strips 128-255 -> Channel 14 // Sector 7, strips 0-127 -> Channel 13 // Sector 7, strips 128-255 -> Channel 15 // // and so on upto sector 40. // // 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)); addr = chan + (altro << 4) + (board << 7); return kTRUE; } //____________________________________________________________________ Int_t AliFMDAltroMapping::GetHWAddress(Int_t sec, Int_t str, Int_t ring) const { // Return hardware address corresponding to sector sec, strip str, // and ring ring. Mapping from TPC to FMD coordinates are // // TPC | FMD // --------+------ // padrow | sector // pad | strip // sector | ring // UInt_t ddl, hwaddr; Char_t r = Char_t(ring); if (!Detector2Hardware(1, r, sec, str, ddl, hwaddr)) return -1; return hwaddr; } //____________________________________________________________________ Int_t AliFMDAltroMapping::GetPadRow(Int_t hwaddr) const { // Return sector corresponding to hardware address hwaddr. Mapping // from TPC to FMD coordinates are // // TPC | FMD // --------+------ // padrow | sector // pad | strip // sector | ring // UShort_t det; Char_t ring; UShort_t sec; UShort_t str; Int_t ddl = AliFMDParameters::kBaseDDL; if (!Hardware2Detector(ddl, hwaddr, det, ring, sec, str)) return -1; return Int_t(sec); } //____________________________________________________________________ Int_t AliFMDAltroMapping::GetPad(Int_t hwaddr) const { // Return strip corresponding to hardware address hwaddr. Mapping // from TPC to FMD coordinates are // // TPC | FMD // --------+------ // padrow | sector // pad | strip // sector | ring // UShort_t det; Char_t ring; UShort_t sec; UShort_t str; Int_t ddl = AliFMDParameters::kBaseDDL; if (!Hardware2Detector(ddl, hwaddr, det, ring, sec, str)) return -1; return Int_t(str); } //____________________________________________________________________ Int_t AliFMDAltroMapping::GetSector(Int_t hwaddr) const { // Return ring corresponding to hardware address hwaddr. Mapping // from TPC to FMD coordinates are // // TPC | FMD // --------+------ // padrow | sector // pad | strip // sector | ring // UShort_t det; Char_t ring; UShort_t sec; UShort_t str; Int_t ddl = AliFMDParameters::kBaseDDL; if (!Hardware2Detector(ddl, hwaddr, det, ring, sec, str)) return -1; return Int_t(ring); } //_____________________________________________________________________________ // // EOF //