---

EcalElectronicsMapping.cc

Go to the documentation of this file.

#include "Geometry/EcalMapping/interface/EcalElectronicsMapping.h"
#include "DataFormats/EcalDetId/interface/EEDetId.h"
#include "DataFormats/EcalDetId/interface/EBDetId.h"
#include "DataFormats/EcalDetId/interface/EcalTrigTowerDetId.h"
#include "DataFormats/DetId/interface/DetId.h"

#include "DataFormats/EcalDetId/interface/EcalElectronicsId.h"
#include "DataFormats/EcalDetId/interface/EcalTriggerElectronicsId.h"

#include "FWCore/Utilities/interface/Exception.h"


using boost::multi_index_container;
using namespace boost::multi_index;

        // -----------------------------------------------------------------------
        //
        // -- Conventions :
        //
        //    DCCid and TCCid numbering : cf slides of Ph. Gras :
        //     in EE- : DCCid between 1 and 8.
        //              DCCid number 1 covers the range -30 deg < phi < 10 deg.
        //     in EB- : DCCid between 10 and 27.
        //              DCCid number 10 covers the range -10 deg < phi < 10 deg.
        //     in EB+:  DCCid between 28 and 45.
        //              DCCid number 28 covers the range -10 deg < phi < 10 deg.
        //     in EE+:  DCCid between 46 and 54;
        //              DCCid number 46 covers the range -30 deg < phi < 10 deg.
        //
        //    SMid : 1-18 correspond to EB+   (SMid 1 corresponds to DCC 28)
        //           19-36 correspond to EB-
        //
        // ------------------------------------------------------------------------


EcalElectronicsMapping::EcalElectronicsMapping() {

        // Fill the map (Barrel) for the Laser Monitoring readout numbers :
        // Each DCC actually corresponds to 2 LMs,  ilm and ilm + 1

        int ilm = MIN_LM_EBM;
        for (int dcc=MIN_DCCID_EBM; dcc <= MAX_DCCID_EBM; dcc++) {
                LaserMonitoringMap_EB[dcc] = ilm;
                ilm += 2;
        }
        ilm = MIN_LM_EBP;
        for (int dcc=MIN_DCCID_EBP; dcc <= MAX_DCCID_EBP; dcc++) {
                LaserMonitoringMap_EB[dcc] = ilm;
                ilm += 2;
        }

        // Fill the map (EndCap) for the Laser Monitoring readout numbers :
        // Each DCC corresponds to onr LM, but DCC 8 (LM 80 and 81) and DCC 53 (LM 90 and 91)

        ilm = MIN_LM_EEM;
        for (int dcc=MIN_DCCID_EEM; dcc <= MAX_DCCID_EEM; dcc++) {
                LaserMonitoringMap_EE[dcc] = ilm;
                ilm += 1;
                if (dcc == 8) ilm += 1;
        }
        ilm = MIN_LM_EEP;
        for (int dcc=MIN_DCCID_EEP; dcc <= MAX_DCCID_EEP; dcc++) {
                LaserMonitoringMap_EE[dcc] = ilm;
                ilm += 1;
                if (dcc == 53) ilm += 1;
        }
        
}


int EcalElectronicsMapping::DCCid(const EBDetId& id) const 

        // SM id, between 1 (phi = -10 deg) and 18 in EB+
        // between 19 (phi = -10 deg) and 27 in EB-.
        // returns DCCid, currently between 10 and 27 (EB-), 28 and 45 (EB+).
        // For the EE case, use getElectronicsId.
{
        int dcc = id.ism();      
        if (id.zside() < 0) {
                dcc  += DCCID_PHI0_EBM - 19;
        }
        else {
                dcc  += DCCID_PHI0_EBP -1;
        }
        return dcc;
}


int EcalElectronicsMapping::TCCid(const EBDetId& id) const
                                                                                                                     
        // SM id, between 1 (phi = -10 deg) and 18 in EB+
        // between 19 (phi = -10 deg) and 27 in EB-.
        // returns TCCid, currently between 37 and 54 (EB-), 55 and 72 (EB+).
        // For the EE case, use getEcalTriggerElectronicsId.
{
        int tcc = id.ism();
        if (id.zside() < 0) {
                tcc  += TCCID_PHI0_EBM - 19;
        }
        else {
                tcc  += TCCID_PHI0_EBP -1;
        }
        return tcc;
}



int EcalElectronicsMapping::iTT(const EcalTrigTowerDetId& id) const

        // returns the index of a Trigger Tower within its TCC.
        // This is between 1 and 68 for the Barrel, and between
        // 1 and 32 to 34 (t.b.c.) for the EndCap.

{
  if ( id.subDet() == EcalBarrel )
    {
      int ie = id.ietaAbs() -1;
      int ip;
      int phi = id.iphi();
      phi += 2;
      if (phi > 72) phi = phi-72;
      if (id.zside() < 0) {
        ip = (( phi -1 ) % kEBTowersInPhi ) + 1;
      } else {
        ip = kEBTowersInPhi - ((phi -1 ) % kEBTowersInPhi );
      }
                                                                                                                     
      return (ie * kEBTowersInPhi) + ip;
    }
  else if ( id.subDet() == EcalEndcap)   {
        int ie = id.ietaAbs();
        bool inner = (ie >= iEEEtaMinInner);
        if (inner) {
                ie = ie - iEEEtaMinInner;
                ie = ie % kEETowersInEtaPerInnerTCC;
        }
        else {
                ie = ie - iEEEtaMinOuter;
                ie = ie % kEETowersInEtaPerOuterTCC;
        }
                                                                                                                     
        int ip = id.iphi();
        ip = (ip + 1) % (kEETowersInPhiPerQuadrant*4); 
                                // now iphi between 0 and 71,
                                // with iphi=0,1,2,3 in 1st Phi sector
        ip = ip % kEETowersInPhiPerTCC;
        int itt = kEETowersInPhiPerTCC * ie + ip + 1;
        return itt;
  }
  else {
        throw cms::Exception("InvalidDetId") << " Wrong EcalTrigTowerDetId in EcalElectronicsMapping::iTT. " ;
        return 0;
  }

}


int EcalElectronicsMapping::TCCid(const EcalTrigTowerDetId& id) const  {

  if ( id.subDet() == EcalBarrel )
    {
        int phi = id.iphi() +2;
        if (phi > 72) phi = phi-72;
        int tcc = ( phi - 1 ) / kEBTowersInPhi + 1;
        if ( id.zside() < 0 ) tcc += 18;      // now id is the SMid
                if (id.zside() < 0) {
                        tcc  += TCCID_PHI0_EBM - 19;
                }
                else {
                        tcc  += TCCID_PHI0_EBP -1;
                }
        return tcc;
    }

  else if ( id.subDet() == EcalEndcap )
    {
        int ie = id.ietaAbs();
        bool inner = (ie >= iEEEtaMinInner);
        int ip = id.iphi();    // iphi = 1 corresponds to 0 < phi < 5 degrees
        ip = (ip + 1) % (kEETowersInPhiPerQuadrant*4);  
                                // now iphi between 0 and 71,
                                // with iphi=0,1,2,3 in 1st Phi sector
        int Phiindex = ip / 4;
        if (inner) {
                if (id.ieta()> 0) Phiindex += TCCID_PHI0_EEP_IN;
                else Phiindex += TCCID_PHI0_EEM_IN;
        }
        else {
                if (id.ieta() > 0) Phiindex += TCCID_PHI0_EEP_OUT;
                else Phiindex += TCCID_PHI0_EEM_OUT;
        }
        return Phiindex;
    }
  else {
        throw cms::Exception("InvalidDetId") << " Wrong EcalTrigTowerDetId in EcalElectronicsMapping::TCCid.";
        return 0;
  }
}



int EcalElectronicsMapping::DCCid(const EcalTrigTowerDetId& id) const  {

        // This is needed for digitoraw. For a given Trigger Tower,
        // one needs to know to which FED it gets written.

  if ( id.subDet() == EcalBarrel )
    {
        int phi = id.iphi() +2;
        if (phi > 72) phi = phi-72;
        int dcc = ( phi - 1 ) / kEBTowersInPhi + 1;
        if ( id.zside() < 0 ) dcc += 18;      // now id is the SMid
                if (id.zside() < 0) {
                        dcc  += DCCID_PHI0_EBM - 19;
                }
                else {
                        dcc  += DCCID_PHI0_EBP -1;
                }
        return dcc;
    }
  else if ( id.subDet() == EcalEndcap) 
    {                   //FIXME :  yes I need to improve this part of the code...
        int tccid = TCCid(id);
        int dcc=0;
        int offset = 0;
        if (tccid >= 73) {
                tccid = tccid-72;
                offset = 45;
        }
        if (tccid == 24 || tccid == 25 || tccid == 6 || tccid == 7)  dcc=4;
        if (tccid == 26 || tccid == 27 || tccid == 8 || tccid == 9)  dcc=5;
        if (tccid == 28 || tccid == 29 || tccid == 10 || tccid == 11)  dcc=6;
        if (tccid == 30 || tccid == 31 || tccid == 12 || tccid == 13)  dcc=7;
        if (tccid == 32 || tccid == 33 || tccid == 14 || tccid == 15)  dcc=8;
        if (tccid == 34 || tccid == 35 || tccid == 16 || tccid == 17)  dcc=9;
        if (tccid == 36 || tccid == 19 || tccid == 18 || tccid == 1)  dcc=1;
        if (tccid == 20 || tccid == 21 || tccid == 2 || tccid == 3)  dcc=2;
        if (tccid == 22 || tccid == 23 || tccid == 4 || tccid == 5)  dcc=3;
        dcc += offset;
        return dcc;
    }
  else {
        throw cms::Exception("InvalidDetId") << " Wrong EcalTrigTowerDetId in EcalElectronicsMapping::DCCid.";
        return 0;
  }

}

EcalTrigTowerDetId EcalElectronicsMapping::getTrigTowerDetId(int TCCid, int iTT) const {
        
        // needed for unpacking code.

   EcalSubdetector sub = subdet(TCCid, TCCMODE);
   int zIndex = zside(TCCid, TCCMODE);

   if (sub == EcalBarrel) {

        int DCCid =0;
        int jtower = iTT-1;
        if (zIndex > 0) DCCid = TCCid - TCCID_PHI0_EBP + DCCID_PHI0_EBP;
        else DCCid = TCCid - TCCID_PHI0_EBM + DCCID_PHI0_EBM;
        int SMid = (zIndex > 0) ? DCCid - 27 : DCCid + 9;

        int etaTT = jtower / kTowersInPhi +1;   // between 1 and 17
        int phiTT;
                                                                                                                     
        if (zIndex > 0)
           phiTT=(SMid - 1) * kTowersInPhi + (kTowersInPhi -(jtower % kTowersInPhi)) -1;
        else
           phiTT=(SMid - 19)* kTowersInPhi + jtower % kTowersInPhi;
        phiTT ++;
        phiTT = phiTT -2;
        if (phiTT <= 0) phiTT = 72+phiTT;
        EcalTrigTowerDetId tdetid(zIndex, EcalBarrel, etaTT, phiTT,EcalTrigTowerDetId::SUBDETIJMODE);
        return tdetid;
   }

   else if (sub == EcalEndcap) {

        bool EEminus = (zIndex <0);
        bool EEplus  = (zIndex >0);     
        if ( (!EEminus) && (!EEplus) )
                throw cms::Exception("InvalidDetId") <<
                "EcalElectronicsMapping:  Cannot create EcalTrigTowerDetId object. " ;
        int iz = 0;
        int tcc = TCCid;
        if (tcc <= TCCID_PHI0_EEM_OUT+kTCCinPhi) iz = -1;
        else if (tcc >= TCCID_PHI0_EEP_OUT) iz = +1;

        bool inner = false;
        if (iz < 0 && tcc >= TCCID_PHI0_EEM_IN && tcc <= TCCID_PHI0_EEM_IN+kTCCinPhi) inner=true;
        if (iz > 0 && tcc >= TCCID_PHI0_EEP_IN && tcc <= TCCID_PHI0_EEP_IN+kTCCinPhi) inner=true;
        bool outer = !inner;

        int ieta = iTT / kEETowersInPhiPerTCC;
        int iphi = (iTT-1) % kEETowersInPhiPerTCC;
        if (inner) ieta += iEEEtaMinInner;
        else ieta += iEEEtaMinOuter;
        if (iz < 0) ieta = -ieta;

        int TCC_origin = 0;
        if (inner && iz < 0) TCC_origin=TCCID_PHI0_EEM_IN;
        if (outer && iz < 0) TCC_origin=TCCID_PHI0_EEM_OUT;
        if (inner && iz > 0) TCC_origin=TCCID_PHI0_EEP_IN;
        if (outer && iz > 0) TCC_origin=TCCID_PHI0_EEP_OUT;
        tcc = tcc - TCC_origin;

        iphi += kEETowersInPhiPerTCC * tcc;
        iphi = (iphi -2 + 4*kEETowersInPhiPerQuadrant) % (4*kEETowersInPhiPerQuadrant) + 1;

        int tower_i = abs(ieta);
        int tower_j = iphi;
        EcalTrigTowerDetId tdetid(zIndex, EcalEndcap, tower_i, tower_j,EcalTrigTowerDetId::SUBDETIJMODE);
        return tdetid;

   }
  else {
        throw cms::Exception("InvalidDetId") << 
                " Wrong indices in EcalElectronicsMapping::getTrigTowerDetId. TCCid = " << TCCid << " iTT = " << iTT << ".";
  }


}





EcalElectronicsId EcalElectronicsMapping::getElectronicsId(const DetId& id) const {

  EcalSubdetector subdet = EcalSubdetector(id.subdetId());
  if (subdet == EcalBarrel) {
        const EBDetId ebdetid = EBDetId(id);

        int dcc = DCCid(ebdetid);
        bool EBPlus = (zside(dcc,DCCMODE) > 0);
        bool EBMinus = !EBPlus;

        EcalTrigTowerDetId trigtower = ebdetid.tower();
        // int tower = trigtower.iTT();
        int tower = iTT(trigtower);

        int ieta = EBDetId(id).ietaAbs();
        int iphi = EBDetId(id).iphi();
        int strip(0);
        int channel(0);
        bool RightTower = rightTower(tower);
        if (RightTower) {
                strip = (ieta-1)%5;
                if (strip%2 == 0) {
                        if (EBMinus) channel = (iphi-1) %5;
                        if (EBPlus) channel = 4 -( (iphi-1) %5 );
                }
                else {
                        if (EBMinus) channel = 4 -( (iphi-1) %5 ); 
                        if (EBPlus) channel = (iphi-1) %5;
                }
        }
        else {
                strip = 4 - ( (ieta-1)%5 );
                if (strip%2 == 0) {
                        if (EBMinus) channel = 4 -( (iphi-1) %5 );
                        if (EBPlus) channel = (iphi-1) %5;
                }
                else {
                        if (EBMinus) channel = (iphi-1) %5;
                        if (EBPlus) channel = 4 -( (iphi-1) %5 );
                }
        }
        strip += 1;
        channel += 1;
        
        EcalElectronicsId elid = EcalElectronicsId(dcc,tower,strip,channel);
        
        return elid;
  }
  else if (subdet == EcalEndcap) {
        EcalElectronicsMap_by_DetId::const_iterator it=get<0>(m_items).find(id);
        EcalElectronicsId elid = it -> elid;
        return elid;
  }
  else {
        throw cms::Exception("InvalidDetId") <<
                " Wrong DetId in EcalElectronicsMapping::getElectronicsId.";
  }

}


EcalTriggerElectronicsId EcalElectronicsMapping::getTriggerElectronicsId(const DetId& id) const {
  EcalSubdetector subdet = EcalSubdetector(id.subdetId());

  if (subdet == EcalBarrel) {

        const EcalElectronicsId& elid = getElectronicsId(id);
        EcalTriggerElectronicsId trelid = getTriggerElectronicsId(elid);
        return trelid;
  }
  else if (subdet == EcalEndcap) {
        EcalElectronicsMap_by_DetId::const_iterator it=get<0>(m_items).find(id);
        EcalTriggerElectronicsId trelid = it -> trelid;
        return trelid;
  }
  else {
        throw cms::Exception("InvalidDetId") <<
                " Wrong DetId in EcalElectronicsMapping::getTriggerElectronicsId.";
  }
}


DetId EcalElectronicsMapping::getDetId(const EcalElectronicsId& id) const {
  EcalSubdetector subdet = id.subdet();

  if (subdet == EcalBarrel) {
        int dcc = id.dccId();
        int tower = id.towerId();
        int strip = id.stripId();
        int channel = id.xtalId();
                                                                                                           
        int smid = 0;
        int iphi = 0;
        bool EBPlus = (id.zside() > 0);
        bool EBMinus = !EBPlus;

        if (id.zside() < 0) {
                smid = dcc + 19 - DCCID_PHI0_EBM;
                iphi = (smid - 19) * kCrystalsInPhi;
                iphi += 5 * ( (tower-1) % kTowersInPhi );
        }
        else {
                smid = dcc +1 - DCCID_PHI0_EBP;
                iphi = (smid - 1) * kCrystalsInPhi;
                iphi += 5 * (
                        kTowersInPhi - ( (tower-1) % kTowersInPhi ) -1
                        );
        }
        bool RightTower = rightTower(tower);
        int ieta = 5 * ((tower-1) / kTowersInPhi) + 1;
        if (RightTower) {
                ieta += (strip-1);
                if (strip%2 == 1) {
                        if (EBMinus) iphi += (channel-1) +1;
                        if (EBPlus) iphi += (4 - (channel-1)) +1;
                }
                else {
                        if (EBMinus) iphi += (4 - (channel-1)) +1;
                        if (EBPlus) iphi += (channel-1) +1;
                }
        }
        else {
                ieta += 4 - (strip-1);
                if (strip%2 == 1) {
                        if (EBMinus) iphi += (4 - (channel-1)) +1;
                        if (EBPlus) iphi += (channel-1) +1;
                }
                else {
                        if (EBMinus) iphi += (channel-1) +1;
                        if (EBPlus) iphi += (4 - (channel-1)) +1;
                }
        }
        if (id.zside() < 0) ieta = -ieta;

        EBDetId e(ieta,iphi,EBDetId::ETAPHIMODE);
        return e;
  }

  else if (subdet == EcalEndcap) {
        EcalElectronicsMap_by_ElectronicsId::const_iterator it=get<1>(m_items).find(id);
        DetId cell = it -> cell;
        return cell;
  }
  else throw cms::Exception("InvalidDetId") << "Wrong EcalElectronicsId in EcalElectronicsMapping::getDetId." ;
}


EcalTriggerElectronicsId EcalElectronicsMapping::getTriggerElectronicsId(const EcalElectronicsId& id) const {

  EcalSubdetector subdet = id.subdet();

  if (subdet == EcalBarrel) {
        int strip = id.stripId();
        int xtal = id.xtalId();
        int tower = id.towerId();
        int tcc = id.dccId();
        if (id.zside() < 0) {
                tcc  += TCCID_PHI0_EBM - DCCID_PHI0_EBM;
        }
        else {
                tcc  += TCCID_PHI0_EBP - DCCID_PHI0_EBP;
        }
        EcalTriggerElectronicsId trelid(tcc,tower,strip,xtal);
        return trelid;

  }
  else if (subdet == EcalEndcap) {
        EcalElectronicsMap_by_ElectronicsId::const_iterator it=get<1>(m_items).find(id);
        EcalTriggerElectronicsId trelid = it -> trelid;
        return trelid;
  }
  else throw cms::Exception("InvalidDetId") << "Wrong EcalElectronicsId in EcalElectronicsMapping::getTriggerElectronicsId.";
}


DetId EcalElectronicsMapping::getDetId(const EcalTriggerElectronicsId& id) const {

  EcalSubdetector subdet = id.subdet();

  if (subdet == EcalBarrel) {
        const EcalElectronicsId& elid = getElectronicsId(id); 
        DetId cell = getDetId(elid);    
        return cell;
  }
  else if (subdet == EcalEndcap) {
        EcalElectronicsMap_by_TriggerElectronicsId::const_iterator it=get<2>(m_items).find(id);
        DetId cell = it -> cell;
        return cell;
  }
  else throw cms::Exception("InvalidDetId") << "Wrong EcalTriggerElectronicsId in EcalElectronicsMapping::getDetId." ;
}



EcalElectronicsId EcalElectronicsMapping::getElectronicsId(const EcalTriggerElectronicsId& id) const {

  EcalSubdetector subdet = id.subdet();

  if (subdet == EcalBarrel) {
        int strip = id.pseudoStripId();
        int xtal = id.channelId();
        int tower = id.ttId();
        int dcc = id.tccId();
        if (id.zside() < 0) {
                dcc  -= TCCID_PHI0_EBM - DCCID_PHI0_EBM;
        }
        else {
                dcc  -= TCCID_PHI0_EBP - DCCID_PHI0_EBP;
        }
        EcalElectronicsId elid(dcc,tower,strip,xtal);
        return elid;
  }
  else if (subdet == EcalEndcap) {
        EcalElectronicsMap_by_TriggerElectronicsId::const_iterator it=get<2>(m_items).find(id);
        EcalElectronicsId elid = it -> elid;
        return elid;
  }
  else throw cms::Exception("InvalidDetId") << "Wrong EcalTriggerElectronicsId in EcalElectronicsMapping::getElectronicsId.";
}




std::vector<DetId> EcalElectronicsMapping::dccConstituents(int dccId) const {

  EcalSubdetector sub = subdet(dccId,DCCMODE);
  std::vector<DetId> items;

  if (sub == EcalBarrel) { 
        for (int tower=1; tower <= kEBTowersPerSM; tower++) {
                std::vector<DetId> xtals = dccTowerConstituents(dccId,tower);
                int size = xtals.size();
                for (int i=0; i < size; i++) {
                        DetId detid = xtals[i];
                        items.push_back(detid);
                }
        }
        return items; 
  }
  else if (sub == EcalEndcap) {
        EcalElectronicsMap_by_DccId::const_iterator lb,ub;
        boost::tuples::tie(lb,ub)=get<3>(m_items).equal_range(dccId);
        while (lb != ub) {
                DetId cell = lb -> cell;
                items.push_back(cell);
                ++ lb;
        }
        return items;
  }
  else throw cms::Exception("InvalidDetId") << "Wrong dccId = " << dccId << " in EcalElectronicsMapping::dccConstituents. ";
}



std::vector<DetId> EcalElectronicsMapping::dccTowerConstituents(int dccId, int tower) const {

  EcalSubdetector sub = subdet(dccId,DCCMODE);
  std::vector<DetId> items;

  if (sub == EcalBarrel) {
        int iz = zside(dccId, DCCMODE);
        int smid = 0;
        int iphi = 0;
        if (iz < 0) {
                smid = dccId + 19 - DCCID_PHI0_EBM;
                iphi = (smid - 19) * kCrystalsInPhi;
                iphi += 5 * ( (tower-1) % kTowersInPhi );
        }
        else {
                smid = dccId +1 - DCCID_PHI0_EBP;
                iphi = (smid - 1) * kCrystalsInPhi;
                iphi += 5 * (
                        kTowersInPhi - ( (tower-1) % kTowersInPhi ) -1
                        );
        }
        int ieta = 5 * ((tower-1) / kTowersInPhi) + 1;
        for (int ip=1; ip <=5; ip++) {
         for (int ie=0; ie <=4; ie++) {
                int ieta_xtal = ieta + ie;
                int iphi_xtal = iphi + ip;
                if (iz < 0) ieta_xtal = -ieta_xtal;
                EBDetId ebdetid(ieta_xtal,iphi_xtal,EBDetId::ETAPHIMODE);
                items.push_back(ebdetid);
         }
        }
        return items;
  }

  else if (sub == EcalEndcap) {
        EcalElectronicsMap_by_DccId_and_TowerId::const_iterator lb,ub;
        boost::tuples::tie(lb,ub)=get<4>(m_items).equal_range(boost::make_tuple(int(dccId), int(tower)));
        while (lb != ub) {
                DetId cell = lb -> cell;
                items.push_back(cell);
                ++ lb;
        }
        return items;
  }
  else throw cms::Exception("InvalidDetId") << 
        "Wrong dccId = " << dccId << " tower = " << tower << " in EcalElectronicsMapping::dccTowerConstituents.";
}



std::vector<DetId> EcalElectronicsMapping::stripConstituents(int dccId, int tower, int strip) const {

  EcalSubdetector sub = subdet(dccId,DCCMODE);
  std::vector<DetId> items;

  if (sub == EcalBarrel) {

        int iz = zside(dccId, DCCMODE);
        bool RightTower = rightTower(tower);
        int smid = 0;
        int iphi = 0;
        if (iz < 0) {
                smid = dccId + 19 - DCCID_PHI0_EBM;
                iphi = (smid - 19) * kCrystalsInPhi;
                iphi += 5 * ( (tower-1) % kTowersInPhi );
        }
        else {
                smid = dccId +1 - DCCID_PHI0_EBP;
                iphi = (smid - 1) * kCrystalsInPhi;
                iphi += 5 * (
                        kTowersInPhi - ( (tower-1) % kTowersInPhi ) -1
                        );
        }
        int ieta = 5 * ((tower-1) / kTowersInPhi) + 1;
        if (RightTower) {
                ieta += (strip-1);
        }
        else {
                ieta += 4 - (strip-1);
        }
        for (int ip=1; ip <=5; ip++) {
                int ieta_xtal = ieta ;
                int iphi_xtal = iphi + ip;
                if (iz < 0) ieta_xtal = -ieta_xtal;
                EBDetId ebdetid(ieta_xtal,iphi_xtal,EBDetId::ETAPHIMODE);
                items.push_back(ebdetid);
        }

        return items;
  }
  else {
        EcalElectronicsMap_by_DccId_TowerId_and_StripId::const_iterator lb,ub;
        boost::tuples::tie(lb,ub)=get<5>(m_items).equal_range(boost::make_tuple(int(dccId), int(tower), int(strip)));
        while (lb != ub) {
                DetId cell = lb -> cell;
                items.push_back(cell);
                ++ lb;
        }
        return items;
  }
  
}


std::vector<DetId> EcalElectronicsMapping::tccConstituents(int tccId) const {

  EcalSubdetector sub = subdet(tccId,TCCMODE);
  std::vector<DetId> items;

  if (sub == EcalBarrel) {
        int iz =  zside(tccId,TCCMODE);
        int dccId = tccId;
        if (iz > 0) dccId = dccId - TCCID_PHI0_EBP + DCCID_PHI0_EBP;
        else dccId = dccId - TCCID_PHI0_EBM + DCCID_PHI0_EBM;
        items = dccConstituents(dccId); 
        return items;
  }
  else {
        EcalElectronicsMap_by_TccId::const_iterator lb,ub;
        boost::tuples::tie(lb,ub)=get<6>(m_items).equal_range(tccId);
        while (lb != ub) {
                DetId cell = lb -> cell;
                items.push_back(cell);
                ++ lb;
        }
        return items;
  }
}



std::vector<DetId> EcalElectronicsMapping::ttConstituents(int tccId, int tt) const {

  EcalSubdetector sub = subdet(tccId,TCCMODE);
  std::vector<DetId> items;

  if (sub == EcalBarrel) {
        int iz =  zside(tccId,TCCMODE);
        int dccId = tccId;
        if (iz > 0) dccId = dccId - TCCID_PHI0_EBP + DCCID_PHI0_EBP;
        else dccId = dccId - TCCID_PHI0_EBM + DCCID_PHI0_EBM;
        items = dccTowerConstituents(dccId,tt);
        return items;
  }
  else {
        EcalElectronicsMap_by_TccId_and_TtId::const_iterator lb,ub;
        boost::tuples::tie(lb,ub)=get<7>(m_items).equal_range(boost::make_tuple(int(tccId), int(tt)));
        while (lb != ub) {
                DetId cell = lb -> cell;
                items.push_back(cell);
                ++ lb;
        }
        return items;
  }
}


std::vector<DetId> EcalElectronicsMapping::pseudoStripConstituents(int tccId, int tt, int pseudostrip) const {

  EcalSubdetector sub = subdet(tccId,TCCMODE);
  std::vector<DetId> items;

  if (sub == EcalBarrel) {
        int iz =  zside(tccId,TCCMODE);
        int dccId = tccId;
        if (iz > 0) dccId = dccId - TCCID_PHI0_EBP + DCCID_PHI0_EBP;
        else dccId = dccId - TCCID_PHI0_EBM + DCCID_PHI0_EBM;
        items = stripConstituents(dccId,tt,pseudostrip);
        return items;
  }
  else {
        EcalElectronicsMap_by_TccId_TtId_and_PseudostripId::const_iterator lb,ub;
        boost::tuples::tie(lb,ub)=get<8>(m_items).equal_range(boost::make_tuple(int(tccId), int(tt), int(pseudostrip)));
        while (lb != ub) {
                DetId cell = lb -> cell;
                items.push_back(cell);
                ++ lb;
        }
        return items;
  }
}

void EcalElectronicsMapping::assign(const DetId& cell, const EcalElectronicsId& elid, const EcalTriggerElectronicsId& tower) {

        m_items.insert(MapItem(cell, elid, tower));
}


std::pair<int, int> EcalElectronicsMapping::getDCCandSC(EcalScDetId id) const {

// pair.first = DCC id
// pair.second = DCC_channel
// For digi2raw, read the SRflags and write the SR block :
// need to find out, for an EcalScDetId, which is the DCC and the DCC_channel

        std::pair<int,int> ind;
        EEDetId dum;
        int ix = id.ix();
        int iy = id.iy();
        int zside = id.zside();
        ix = (ix-1)*5 +1;
        iy = (iy-1)*5 +1;
        ix = 5 * (ix/5) +1;
        iy = 5 * (iy/5) +1;
        int ix_c = ix;
        int iy_c = iy;
        if (! dum.validDetId(ix_c,iy_c,zside) ) {
            ix_c = ix +4;
            iy_c = iy ;
            if ( ! dum.validDetId(ix_c,iy_c,zside) ) {
             ix_c = ix +4;
             iy_c = iy +4;
             if ( ! dum.validDetId(ix_c,iy_c,zside) ) {
              ix_c = ix;
              iy_c = iy +4;
             }
            }
        }
        EEDetId eedetid(ix_c,iy_c,zside,EEDetId::XYMODE);
        EcalElectronicsId elid = getElectronicsId(eedetid);
        int Dccid = elid.dccId();
        int DCC_Channel = elid.towerId();
        ind.first = Dccid;
        ind.second = DCC_Channel;
        return ind;
}



EcalScDetId EcalElectronicsMapping::getEcalScDetId(int DCCid, int DCC_Channel) const {

// For unpacking of ST flags.

        std::vector<DetId> xtals = dccTowerConstituents(DCCid, DCC_Channel);
        if (xtals.size() == 0) throw cms::Exception("InvalidDetId") << 
                "EcalElectronicsMapping : can not create EcalScDetId for DCC " << DCCid << 
                " and DCC_Channel " << DCC_Channel << ".";

        EEDetId eedetid = xtals[0];
        int ix = eedetid.ix();
        int iy = eedetid.iy();
        int iz = eedetid.zside();
        int ix_SC = (ix-1)/5 + 1;
        int iy_SC = (iy-1)/5 + 1;
        EcalScDetId scdetid(ix_SC,iy_SC,iz);
        return scdetid;

}



EcalSubdetector EcalElectronicsMapping::subdet(int dcctcc, int mode) const {
  if (mode == DCCMODE) {
        if ( (dcctcc >= MIN_DCCID_EBM && dcctcc <= MAX_DCCID_EBM) ||
             (dcctcc >= MIN_DCCID_EBP && dcctcc <= MAX_DCCID_EBP) ) return EcalBarrel;
        else return EcalEndcap;
  }
  else if (mode == TCCMODE) {
        if ( (dcctcc >= MIN_TCCID_EBM && dcctcc <= MAX_TCCID_EBM) ||
             (dcctcc >= MIN_TCCID_EBP && dcctcc <= MAX_TCCID_EBP) ) return EcalBarrel;
        else return EcalEndcap;
  }
  else throw cms::Exception("InvalidDetId") << " Wrong mode in EcalElectronicsMapping::subdet " << mode << ".";
}


int EcalElectronicsMapping::zside(int dcctcc, int mode) const {
  if (mode == DCCMODE) {
        if (dcctcc >= MIN_DCCID_EBM && dcctcc <= MAX_DCCID_EBM) return -1;
        if (dcctcc >= MIN_DCCID_EBP && dcctcc <= MAX_DCCID_EBP) return +1;
        if (dcctcc >= MIN_DCCID_EEM && dcctcc <= MAX_DCCID_EEM) return -1;
        if (dcctcc >= MIN_DCCID_EEP && dcctcc <= MAX_DCCID_EEP) return +1; 
  }
  else if (mode == TCCMODE) {
        if (dcctcc >= MIN_TCCID_EBM && dcctcc <= MAX_TCCID_EBM) return -1;
        if (dcctcc >= MIN_TCCID_EBP && dcctcc <= MAX_TCCID_EBP) return +1;
        if (dcctcc >= MIN_TCCID_EEM && dcctcc <= MAX_TCCID_EEM) return -1;
        if (dcctcc >= MIN_TCCID_EEP && dcctcc <= MAX_TCCID_EEP) return +1;
  }
  else {
        throw cms::Exception("InvalidDetId") << " Wrong mode in EcalElectronicsMapping::zside " << mode << ".";
  }
  return 0;
}



bool EcalElectronicsMapping::rightTower(int tower) const {
        // for EB, two types of tower (LVRB top/bottom)

  if ((tower>12 && tower<21) || (tower>28 && tower<37) ||
       (tower>44 && tower<53) || (tower>60 && tower<69))
    return true;
  else
    return false;
}


int EcalElectronicsMapping::DCCBoundary(int FED)const {

 if (FED >= MIN_DCCID_EEM && FED <= MAX_DCCID_EEM) return MIN_DCCID_EEM;
 if (FED >= MIN_DCCID_EBM && FED <= MAX_DCCID_EBM) return MIN_DCCID_EBM;
 if (FED >= MIN_DCCID_EBP && FED <= MAX_DCCID_EBP) return MIN_DCCID_EBP;
 if (FED >= MIN_DCCID_EEP && FED <= MAX_DCCID_EEP) return MIN_DCCID_EEP;
 return -1;

}


std::vector<int> EcalElectronicsMapping::GetListofFEDs(const EcalEtaPhiRegion region) const {
  std::vector<int> FEDs;
  GetListofFEDs(region, FEDs);
  return FEDs;
}
void EcalElectronicsMapping::GetListofFEDs(const EcalEtaPhiRegion region, std::vector<int> & FEDs) const {

        // for regional unpacking.
        // get list of FEDs corresponding to a region in (eta,phi)

  //    std::vector<int> FEDs;
        double radTodeg = 180. / Geom::pi();

        bool debug = false;

        double etalow = region.etaLow();
        double philow = region.phiLow() * radTodeg;
        if (debug) std::cout << " etalow philow " << etalow << " " << philow << std::endl;
        int FED_LB = GetFED(etalow,philow);     // left, bottom

        double phihigh = region.phiHigh() * radTodeg;
        if (debug) std::cout << " etalow phihigh " << etalow << " " << phihigh << std::endl;
        int FED_LT = GetFED(etalow,phihigh);    // left, top

        int DCC_BoundaryL = DCCBoundary(FED_LB);
        int deltaL = 18;
        if (FED_LB < MIN_DCCID_EBM || FED_LB > MAX_DCCID_EBP) deltaL=9;

        if (philow < -170 && phihigh > 170) {
                FED_LB = DCC_BoundaryL;
                FED_LT = DCC_BoundaryL + deltaL -1;
        }
        if (debug) std::cout << " FED_LB FED_LT " << FED_LB << " " << FED_LT << std::endl;


        int iL=FED_LB;
        bool dummy = true;
        int idx = 0;
        while (  dummy ) {
                iL = (FED_LB - DCC_BoundaryL + idx ) % deltaL + DCC_BoundaryL;
                FEDs.push_back(iL);
                if (debug) std::cout << "   add fed " << iL << std::endl;
                if ( iL == FED_LT) break;
                idx ++;
        }
 
        double etahigh = region.etaHigh();
        int FED_RB = GetFED(etahigh, philow);   // right, bottom
        if (FED_RB == FED_LB) return;// FEDs;

        int FED_RT = GetFED(etahigh, phihigh);  // right, top

        if (debug) std::cout << "etahigh philow phihigh " << etahigh << " " << philow << " " << phihigh << std::endl;
        int DCC_BoundaryR = DCCBoundary(FED_RB);
        int deltaR = 18;
        if (FED_RB < MIN_DCCID_EBM || FED_RB > MAX_DCCID_EBP) deltaR=9;

        if (philow < -170 && phihigh > 170) {
                FED_RB = DCC_BoundaryR;
                FED_RT = DCC_BoundaryR + deltaR-1;
        }
        if (debug) std::cout << " FED_RB FED_RT " << FED_RB << " " << FED_RT << std::endl;

        int iR=FED_RB;
        idx = 0;
        while ( dummy ) {
                iR = (FED_RB - DCC_BoundaryR + idx) % deltaR + DCC_BoundaryR;
                FEDs.push_back(iR);
                if (debug) std::cout << "   add fed " << iR << std::endl;
                if ( iR == FED_RT) break;
                idx ++;
        }


        if (FED_LB >= MIN_DCCID_EBM && FED_LB <= MAX_DCCID_EBM   &&
            FED_RB >= MIN_DCCID_EEP && FED_RB <= MAX_DCCID_EEP) {
                int minR = FED_LB + 18;
                int maxR = FED_LT + 18;
                int iR = minR;
                int idx = 0;
                while ( dummy ) {
                        iR = (minR - MIN_DCCID_EBP + idx) % 18 + MIN_DCCID_EBP;
                        FEDs.push_back(iR);
                        if (debug) std::cout << "   add fed " << iR << std::endl;
                        if ( iR == maxR) break;
                        idx ++;
                }
                return;// FEDs;
        }

        if (FED_LB >= MIN_DCCID_EEM && FED_LB <= MAX_DCCID_EEM &&
            FED_RB >= MIN_DCCID_EBP && FED_RB <= MAX_DCCID_EBP) {
                int minL = FED_RB - 18;
                int maxL = FED_RT - 18;
                int iL = minL;
                int idx = 0;
                while ( dummy ) {
                        iL = (minL - MIN_DCCID_EBM + idx) % 18 + MIN_DCCID_EBM;
                        FEDs.push_back(iL);
                        if (debug) std::cout << "   add fed " << iL << std::endl;
                        if (iL == maxL) break;
                        idx ++;
                }
                return;// FEDs;
        } 

        if (FED_LB >= MIN_DCCID_EEM && FED_LB <= MAX_DCCID_EEM &&
            FED_RB >= MIN_DCCID_EEP && FED_RB <= MAX_DCCID_EEP) {
                int minL = (FED_LB-1)*2 + MIN_DCCID_EBM;
                if (minL == MIN_DCCID_EBM) minL=MAX_DCCID_EBM;
                else minL = minL -1;
                int maxL = (FED_LT-1)*2 + MIN_DCCID_EBM;
                int iL = minL;
                int idx = 0;
                while (dummy) {
                        iL = (minL - MIN_DCCID_EBM + idx) % 18 + MIN_DCCID_EBM;
                        FEDs.push_back(iL);
                        if (debug) std::cout << "   add fed " << iL << std::endl;
                        if (iL == maxL) break;
                        idx ++;
                }
                int minR = minL + 18;
                int maxR = maxL + 18;
                int iR = minR;
                idx = 0;
                while (dummy) {
                        iR = (minR - MIN_DCCID_EBP + idx) % 18 + MIN_DCCID_EBP;
                        FEDs.push_back(iR);
                        if (debug) std::cout << "   add fed " << iR << std::endl;
                        if (iR == maxR) break;
                        idx ++;
                }
        }

        return;// FEDs;

}

int EcalElectronicsMapping::GetFED(double eta, double phi) const  {

        // for regional unpacking.
        // eta is signed, phi is in degrees.

        int DCC_Phi0 = 0;
        bool IsBarrel = true;
        if (fabs(eta) > 1.479) IsBarrel = false;
        bool Positive = (eta > 0);

        if (IsBarrel && Positive) DCC_Phi0 = DCCID_PHI0_EBP;
        if (IsBarrel && (!Positive)) DCC_Phi0 = DCCID_PHI0_EBM;
        if ((!IsBarrel) && Positive) DCC_Phi0 = MIN_DCCID_EEP;
        if ((!IsBarrel) && (!Positive)) DCC_Phi0 = MIN_DCCID_EEM;

        // phi between 0 and 360 deg :
        if (phi < 0) phi += 360;
        if (phi > 360.) phi = 360. ;
        if (phi < 0) phi = 0. ;

        if (IsBarrel) phi = phi - 350;
        else phi = phi - 330;
        if (phi < 0) phi += 360;
        int iphi = -1;
        if (IsBarrel) iphi = (int)(phi / 20.);
        else iphi = (int)(phi / 40.);

        // std::cout << " in GetFED : phi iphi DCC0 " << phi << " " << iphi << " " << DCC_Phi0 << std::endl;
        
        int DCC = iphi + DCC_Phi0;
        // std::cout << "  eta phi " << eta << " " << " " << phi << " is in FED " << DCC << std::endl;
        return DCC;
}


int EcalElectronicsMapping::getLMNumber(const DetId& id) const {

// Laser Monitoring readout number.

  EcalSubdetector subdet = EcalSubdetector(id.subdetId());

  if (subdet == EcalBarrel) {
        const EBDetId ebdetid = EBDetId(id);
        int dccid = DCCid(ebdetid);
        std::map<int, int>::const_iterator it = LaserMonitoringMap_EB.find(dccid);
        if (it != LaserMonitoringMap_EB.end() ) {
                int ilm = it -> second;
                int iETA = ebdetid.ietaSM();
                int iPHI = ebdetid.iphiSM();
                if (iPHI > 10 && iETA>5) {ilm ++; } ;
                return ilm;
        } 
        else throw cms::Exception("InvalidDCCId") << "Wrong DCCId (EB) in EcalElectronicsMapping::getLMNumber.";
  }

  else if (subdet == EcalEndcap) {
        EcalElectronicsId elid = getElectronicsId(id);
        int dccid = elid.dccId();
        EEDetId eedetid = EEDetId(id);
        std::map<int, int>::const_iterator it = LaserMonitoringMap_EE.find(dccid);
        if (it != LaserMonitoringMap_EB.end() ) {
                int ilm = it -> second;
                if (dccid == 8) {
                        int ix = eedetid.ix();
                        if (ix > 50) ilm += 1;
                }
                if (dccid == 53) {
                        int ix = eedetid.ix();
                        if (ix > 50) ilm += 1;
                }
                return ilm;
        }
        else throw cms::Exception("InvalidDCCId") << "Wrong DCCId (EE) in EcalElectronicsMapping::getLMNumber.";
  }

  return -1;
}

---