[u/mrichter/AliRoot.git] / MUON / AliMUONGlobalTriggerBoard.cxx

/**************************************************************************
 * 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.                  *
 **************************************************************************/

/* $Id$ */

//-----------------------------------------------------------------------------
/// \class AliMUONGlobalTriggerBoard
/// Global trigger implementation:
/// - inputs are regional responses
/// - output is a 12-bit word
/// - 4 bits per trigger level
///
/// \author Rachid Guernane (LPCCFd), 
/// Corrected by Christian Finck (Subatech)
//-----------------------------------------------------------------------------

#include "AliMUONGlobalTriggerBoard.h"
#include "AliLog.h"
#include "TBits.h"

#include <Riostream.h>

/// \cond CLASSIMP
ClassImp(AliMUONGlobalTriggerBoard)
/// \endcond

//___________________________________________
AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard(): AliMUONTriggerBoard()
{
/// Default constructor

   for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0;
   for (Int_t i=0;i< 4;i++) fGlobalInput[i] = 0;
   for (Int_t i=0;i< 4;i++) fMask[i] = 0xffffffff;
}

//___________________________________________
AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard(const char *name, Int_t a) : AliMUONTriggerBoard(name, a)
{
/// Standard constructor

   for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0;
   for (Int_t i=0;i< 4;i++) fGlobalInput[i] = 0;
   for (Int_t i=0;i< 4;i++) fMask[i] = 0xffffffff;
}

//___________________________________________
AliMUONGlobalTriggerBoard::~AliMUONGlobalTriggerBoard()
{
/// Destructor
}

//___________________________________________
void AliMUONGlobalTriggerBoard::Mask(Int_t index, UInt_t mask)
{
  /// mask global trigger board input index with value mask
  if ( index >= 0 && index < 4 ) 
  {
    fMask[index]=mask;
  }
  else
  {
    AliError(Form("Index %d out of bounds (max %d)",index,3));
  }  
}

//___________________________________________
void AliMUONGlobalTriggerBoard::Response()
{
   /// compute the global trigger board
   /// response according to the algo() method
// output from global trigger algorithm
// [+, -, US, LS] * [Hpt, Lpt]
// transformed to [usHpt, usLpt, lsHpt, lsLpt, sHpt, sLpt] according
// to Global Trigger Unit user manual

   Int_t t[16];

   BuildGlobalInput();
   MaskGlobalInput();

   for (Int_t i = 0; i < 16; ++i) 
   {
     t[i] = fRegionalResponse[i];
   }
   
   
   Int_t rank = 8;

   for (Int_t i=0;i<4;i++)
   {
      Int_t ip = 0;
      
      for (Int_t j=0;j<rank;j++)
      {
         UShort_t lthres = Algo(t[2*j],t[2*j+1],"LPT");

         UShort_t hthres = Algo(t[2*j],t[2*j+1],"HPT"); hthres <<= 4;

         t[ip] = lthres | hthres;

         ip++;
      }
      
      rank /= 2; 
   }
   UChar_t sLpt, sHpt, lsLpt, lsHpt, usLpt, usHpt;
   sLpt  = ((t[0] & 0xC)  != 0);
   sHpt  = ((t[0] & 0xC0) != 0);
   lsLpt = ((t[0] & 0x1)  != 0);
   lsHpt = ((t[0] & 0x10) != 0);
   usLpt = ((t[0] & 0x2 ) != 0);
   usHpt = ((t[0] & 0x20) != 0);

   // LSB is zero (trigger choice to send to CTP: sLpt or sHpt)

   sLpt  <<= 1;
   sHpt  <<= 2;
   lsLpt <<= 3;
   lsHpt <<= 4;
   usLpt <<= 5;
   usHpt <<= 6;

   fResponse = sLpt | sHpt | lsLpt | lsHpt | usLpt |usHpt;
   

}

//___________________________________________
UShort_t AliMUONGlobalTriggerBoard::Algo(UShort_t i, UShort_t j, const char *thres)
{
/// global trigger algorithm
///   a ,b = reg  response  =  Hpt (+|-|us|ls) |  Lpt (+|-|us|ls)  
                           
   TBits a(8), b(8); a.Set(8,&i); b.Set(8,&j);

   TBits trg1(2), trg2(2), trg(2);

   if (!strcmp(thres,"LPT"))
   {
      trg1[0] = a[2]; trg1[1] = a[3]; 
      trg2[0] = b[2]; trg2[1] = b[3];
   }
   else
   {
      trg1[0] = a[6]; trg1[1] = a[7]; 
      trg2[0] = b[6]; trg2[1] = b[7];         
   }
       
   TBits trgLS1(1), trgUS1(1), trgLS2(1), trgUS2(1), trgLS(1), trgUS(1);

   if (!strcmp(thres,"LPT"))
   {
      trgLS1[0] = a[0]; trgUS1[0] = a[1]; 
      trgLS2[0] = b[0]; trgUS2[0] = b[1];
   }
   else
   {
      trgLS1[0] = a[4]; trgUS1[0] = a[5]; 
      trgLS2[0] = b[4]; trgUS2[0] = b[5];         
   }

   trgLS[0] = ( trg1[0] & trg2[0] ) | ( trg1[1] & trg2[1] ) | trgLS1[0] | trgLS2[0];
   trgUS[0] = ( trg1[0] & trg2[1] ) | ( trg1[1] & trg2[0] ) | trgUS1[0] | trgUS2[0];
   
   trg[0] = trg1[0] | trg2[0];
   trg[1] = trg1[1] | trg2[1];
   
   TBits v(4);
   
   v[0] = trgLS[0];
   v[1] = trgUS[0];
   v[2] = trg[0];
   v[3] = trg[1];

   UShort_t rv = 0;
   v.Get(&rv);
   
   return rv;
}

//___________________________________________
void AliMUONGlobalTriggerBoard::BuildGlobalInput()
{
  /// build the 4 words (32bits) global input from the regional responses
  /// the order of regional responses is:
  /// 1R, 2R, 2-3R, 3R, 4R, 5R, 6R, 7R, 1L, 2L, 2-3L, 3L, 4L, 5L, 6L, 7L

  for (Int_t i=0;i< 4;i++) fGlobalInput[i] = 0;

  UShort_t regRespInv;
  for (Int_t iReg = 0; iReg < 16; iReg++) {

    regRespInv = InvertPairBits(iReg);

    if (iReg < 8) {    // right
      // Lpt word
      fGlobalInput[0] |=  (regRespInv & 0x0F)       << (4*iReg);
      // Hpt word
      fGlobalInput[2] |= ((regRespInv & 0xF0) >> 4) << (4*iReg);
    } else {           // left
      // Lpt word
      fGlobalInput[1] |=  (regRespInv & 0x0F)       << (4*(iReg-8));
      // Hpt word
      fGlobalInput[3] |= ((regRespInv & 0xF0) >> 4) << (4*(iReg-8));
    }

  }

}

//___________________________________________
void AliMUONGlobalTriggerBoard::MaskGlobalInput()
{
  /// Apply masks to global input and recalculate regional inputs before
  /// applying the global response

  UInt_t gitmp[4];
  for (Int_t i = 0; i < 4; i++) {
    fGlobalInput[i] &= fMask[i];
    gitmp[i] = fGlobalInput[i];
  }

  RecomputeRegional(gitmp);
}


//___________________________________________
void AliMUONGlobalTriggerBoard::RecomputeRegional(UInt_t gitmp[4])
{
  //
  /// Recomput regional response from global input
  //
  for (Int_t iReg = 0; iReg < 16; iReg++) {
    fRegionalResponse[iReg] = 0;
    if (iReg < 8) {    // right
      // Lpt
      fRegionalResponse[iReg] |=  (gitmp[0] >> (4*iReg))     & 0xF;
      // Hpt
      fRegionalResponse[iReg] |= ((gitmp[2] >> (4*iReg))     & 0xF) << 4;
    } else {           // left
      // Lpt
      fRegionalResponse[iReg] |=  (gitmp[1] >> (4*(iReg-8))) & 0xF;
      // Hpt
      fRegionalResponse[iReg] |= ((gitmp[3] >> (4*(iReg-8))) & 0xF) << 4;
    }

    fRegionalResponse[iReg] = InvertPairBits(iReg);
  }
}

//___________________________________________
void AliMUONGlobalTriggerBoard::Scan(Option_t*) const
{
  /// print global trigger output 
  TBits w(7); w.Set(7,&fResponse);

// TRG[1:0]
// 00 noth
// 01 negative track
// 10 positive track
// 11 undef

   Int_t iS[2] = {0,0};

   iS[0] = (Int_t)w.TestBitNumber(1);
   iS[1] = (Int_t)w.TestBitNumber(2);

   Int_t iPU[2] = {w[5],w[6]};
   Int_t iPL[2] = {w[3],w[4]};

   printf("============================================\n");
   printf(" Global Trigger output       Low pt  High pt\n");
   printf(" number of Single           :\t");
   for (Int_t i=0; i<2; i++) printf("%i\t",iS[i]);
   printf("\n");
   printf(" number of UnlikeSign pair  :\t"); 
   for (Int_t i=0; i<2; i++) printf("%i\t",iPU[i]);
   printf("\n");
   printf(" number of LikeSign pair    :\t");  
   for (Int_t i=0; i<2; i++) printf("%i\t",iPL[i]);
   printf("\n");
   printf("===================================================\n");
   printf("\n");
}


//___________________________________________
UShort_t AliMUONGlobalTriggerBoard::InvertPairBits(Int_t iReg)
{
  //
  /// invert "pair" bits in regional response
  /// [+, -, US, LS] becomes [+, -, LS, US]
  //
  TBits rs(8), rsi(8);
  rs.Set(8,&fRegionalResponse[iReg]);
    for (Int_t i = 0; i < 4; i++) {
      if (i%2 == 0) {
	rsi[2*i]   = rs[2*i+1];
	rsi[2*i+1] = rs[2*i];
      } else {
	rsi[2*i]   = rs[2*i];
	rsi[2*i+1] = rs[2*i+1];
      }
    }
    UShort_t regRespInv = 0;
    rsi.Get(&regRespInv);
    return regRespInv;
}
Commit	Line	Data
	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	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
	16	/* $Id$ */
	17
	18	//-----------------------------------------------------------------------------
	19	/// \class AliMUONGlobalTriggerBoard
	20	/// Global trigger implementation:
	21	/// - inputs are regional responses
	22	/// - output is a 12-bit word
	23	/// - 4 bits per trigger level
	24	///
	25	/// \author Rachid Guernane (LPCCFd),
	26	/// Corrected by Christian Finck (Subatech)
	27	//-----------------------------------------------------------------------------
	28
	29	#include "AliMUONGlobalTriggerBoard.h"
	30	#include "AliLog.h"
	31	#include "TBits.h"
	32
	33	#include <Riostream.h>
	34
	35	/// \cond CLASSIMP
	36	ClassImp(AliMUONGlobalTriggerBoard)
	37	/// \endcond
	38
	39	//___________________________________________
	40	AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard(): AliMUONTriggerBoard()
	41	{
	42	/// Default constructor
	43
	44	for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0;
	45	for (Int_t i=0;i< 4;i++) fGlobalInput[i] = 0;
	46	for (Int_t i=0;i< 4;i++) fMask[i] = 0xffffffff;
	47	}
	48
	49	//___________________________________________
	50	AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard(const char *name, Int_t a) : AliMUONTriggerBoard(name, a)
	51	{
	52	/// Standard constructor
	53
	54	for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0;
	55	for (Int_t i=0;i< 4;i++) fGlobalInput[i] = 0;
	56	for (Int_t i=0;i< 4;i++) fMask[i] = 0xffffffff;
	57	}
	58
	59	//___________________________________________
	60	AliMUONGlobalTriggerBoard::~AliMUONGlobalTriggerBoard()
	61	{
	62	/// Destructor
	63	}
	64
	65	//___________________________________________
	66	void AliMUONGlobalTriggerBoard::Mask(Int_t index, UInt_t mask)
	67	{
	68	/// mask global trigger board input index with value mask
	69	if ( index >= 0 && index < 4 )
	70	{
	71	fMask[index]=mask;
	72	}
	73	else
	74	{
	75	AliError(Form("Index %d out of bounds (max %d)",index,3));
	76	}
	77	}
	78
	79	//___________________________________________
	80	void AliMUONGlobalTriggerBoard::Response()
	81	{
	82	/// compute the global trigger board
	83	/// response according to the algo() method
	84	// output from global trigger algorithm
	85	// [+, -, US, LS] * [Hpt, Lpt]
	86	// transformed to [usHpt, usLpt, lsHpt, lsLpt, sHpt, sLpt] according
	87	// to Global Trigger Unit user manual
	88
	89	Int_t t[16];
	90
	91	BuildGlobalInput();
	92	MaskGlobalInput();
	93
	94	for (Int_t i = 0; i < 16; ++i)
	95	{
	96	t[i] = fRegionalResponse[i];
	97	}
	98
	99
	100	Int_t rank = 8;
	101
	102	for (Int_t i=0;i<4;i++)
	103	{
	104	Int_t ip = 0;
	105
	106	for (Int_t j=0;j<rank;j++)
	107	{
	108	UShort_t lthres = Algo(t[2j],t[2j+1],"LPT");
	109
	110	UShort_t hthres = Algo(t[2j],t[2j+1],"HPT"); hthres <<= 4;
	111
	112	t[ip] = lthres \| hthres;
	113
	114	ip++;
	115	}
	116
	117	rank /= 2;
	118	}
	119	UChar_t sLpt, sHpt, lsLpt, lsHpt, usLpt, usHpt;
	120	sLpt = ((t[0] & 0xC) != 0);
	121	sHpt = ((t[0] & 0xC0) != 0);
	122	lsLpt = ((t[0] & 0x1) != 0);
	123	lsHpt = ((t[0] & 0x10) != 0);
	124	usLpt = ((t[0] & 0x2 ) != 0);
	125	usHpt = ((t[0] & 0x20) != 0);
	126
	127	// LSB is zero (trigger choice to send to CTP: sLpt or sHpt)
	128
	129	sLpt <<= 1;
	130	sHpt <<= 2;
	131	lsLpt <<= 3;
	132	lsHpt <<= 4;
	133	usLpt <<= 5;
	134	usHpt <<= 6;
	135
	136	fResponse = sLpt \| sHpt \| lsLpt \| lsHpt \| usLpt \|usHpt;
	137
	138
	139	}
	140
	141	//___________________________________________
	142	UShort_t AliMUONGlobalTriggerBoard::Algo(UShort_t i, UShort_t j, const char *thres)
	143	{
	144	/// global trigger algorithm
	145	/// a ,b = reg response = Hpt (+\|-\|us\|ls) \| Lpt (+\|-\|us\|ls)
	146
	147	TBits a(8), b(8); a.Set(8,&i); b.Set(8,&j);
	148
	149	TBits trg1(2), trg2(2), trg(2);
	150
	151	if (!strcmp(thres,"LPT"))
	152	{
	153	trg1[0] = a[2]; trg1[1] = a[3];
	154	trg2[0] = b[2]; trg2[1] = b[3];
	155	}
	156	else
	157	{
	158	trg1[0] = a[6]; trg1[1] = a[7];
	159	trg2[0] = b[6]; trg2[1] = b[7];
	160	}
	161
	162	TBits trgLS1(1), trgUS1(1), trgLS2(1), trgUS2(1), trgLS(1), trgUS(1);
	163
	164	if (!strcmp(thres,"LPT"))
	165	{
	166	trgLS1[0] = a[0]; trgUS1[0] = a[1];
	167	trgLS2[0] = b[0]; trgUS2[0] = b[1];
	168	}
	169	else
	170	{
	171	trgLS1[0] = a[4]; trgUS1[0] = a[5];
	172	trgLS2[0] = b[4]; trgUS2[0] = b[5];
	173	}
	174
	175	trgLS[0] = ( trg1[0] & trg2[0] ) \| ( trg1[1] & trg2[1] ) \| trgLS1[0] \| trgLS2[0];
	176	trgUS[0] = ( trg1[0] & trg2[1] ) \| ( trg1[1] & trg2[0] ) \| trgUS1[0] \| trgUS2[0];
	177
	178	trg[0] = trg1[0] \| trg2[0];
	179	trg[1] = trg1[1] \| trg2[1];
	180
	181	TBits v(4);
	182
	183	v[0] = trgLS[0];
	184	v[1] = trgUS[0];
	185	v[2] = trg[0];
	186	v[3] = trg[1];
	187
	188	UShort_t rv = 0;
	189	v.Get(&rv);
	190
	191	return rv;
	192	}
	193
	194	//___________________________________________
	195	void AliMUONGlobalTriggerBoard::BuildGlobalInput()
	196	{
	197	/// build the 4 words (32bits) global input from the regional responses
	198	/// the order of regional responses is:
	199	/// 1R, 2R, 2-3R, 3R, 4R, 5R, 6R, 7R, 1L, 2L, 2-3L, 3L, 4L, 5L, 6L, 7L
	200
	201	for (Int_t i=0;i< 4;i++) fGlobalInput[i] = 0;
	202
	203	UShort_t regRespInv;
	204	for (Int_t iReg = 0; iReg < 16; iReg++) {
	205
	206	regRespInv = InvertPairBits(iReg);
	207
	208	if (iReg < 8) { // right
	209	// Lpt word
	210	fGlobalInput[0] \|= (regRespInv & 0x0F) << (4*iReg);
	211	// Hpt word
	212	fGlobalInput[2] \|= ((regRespInv & 0xF0) >> 4) << (4*iReg);
	213	} else { // left
	214	// Lpt word
	215	fGlobalInput[1] \|= (regRespInv & 0x0F) << (4*(iReg-8));
	216	// Hpt word
	217	fGlobalInput[3] \|= ((regRespInv & 0xF0) >> 4) << (4*(iReg-8));
	218	}
	219
	220	}
	221
	222	}
	223
	224	//___________________________________________
	225	void AliMUONGlobalTriggerBoard::MaskGlobalInput()
	226	{
	227	/// Apply masks to global input and recalculate regional inputs before
	228	/// applying the global response
	229
	230	UInt_t gitmp[4];
	231	for (Int_t i = 0; i < 4; i++) {
	232	fGlobalInput[i] &= fMask[i];
	233	gitmp[i] = fGlobalInput[i];
	234	}
	235
	236	RecomputeRegional(gitmp);
	237	}
	238
	239
	240	//___________________________________________
	241	void AliMUONGlobalTriggerBoard::RecomputeRegional(UInt_t gitmp[4])
	242	{
	243	//
	244	/// Recomput regional response from global input
	245	//
	246	for (Int_t iReg = 0; iReg < 16; iReg++) {
	247	fRegionalResponse[iReg] = 0;
	248	if (iReg < 8) { // right
	249	// Lpt
	250	fRegionalResponse[iReg] \|= (gitmp[0] >> (4*iReg)) & 0xF;
	251	// Hpt
	252	fRegionalResponse[iReg] \|= ((gitmp[2] >> (4*iReg)) & 0xF) << 4;
	253	} else { // left
	254	// Lpt
	255	fRegionalResponse[iReg] \|= (gitmp[1] >> (4*(iReg-8))) & 0xF;
	256	// Hpt
	257	fRegionalResponse[iReg] \|= ((gitmp[3] >> (4*(iReg-8))) & 0xF) << 4;
	258	}
	259
	260	fRegionalResponse[iReg] = InvertPairBits(iReg);
	261	}
	262	}
	263
	264	//___________________________________________
	265	void AliMUONGlobalTriggerBoard::Scan(Option_t*) const
	266	{
	267	/// print global trigger output
	268	TBits w(7); w.Set(7,&fResponse);
	269
	270	// TRG[1:0]
	271	// 00 noth
	272	// 01 negative track
	273	// 10 positive track
	274	// 11 undef
	275
	276	Int_t iS[2] = {0,0};
	277
	278	iS[0] = (Int_t)w.TestBitNumber(1);
	279	iS[1] = (Int_t)w.TestBitNumber(2);
	280
	281	Int_t iPU[2] = {w[5],w[6]};
	282	Int_t iPL[2] = {w[3],w[4]};
	283
	284	printf("============================================\n");
	285	printf(" Global Trigger output Low pt High pt\n");
	286	printf(" number of Single :\t");
	287	for (Int_t i=0; i<2; i++) printf("%i\t",iS[i]);
	288	printf("\n");
	289	printf(" number of UnlikeSign pair :\t");
	290	for (Int_t i=0; i<2; i++) printf("%i\t",iPU[i]);
	291	printf("\n");
	292	printf(" number of LikeSign pair :\t");
	293	for (Int_t i=0; i<2; i++) printf("%i\t",iPL[i]);
	294	printf("\n");
	295	printf("===================================================\n");
	296	printf("\n");
	297	}
	298
	299
	300	//___________________________________________
	301	UShort_t AliMUONGlobalTriggerBoard::InvertPairBits(Int_t iReg)
	302	{
	303	//
	304	/// invert "pair" bits in regional response
	305	/// [+, -, US, LS] becomes [+, -, LS, US]
	306	//
	307	TBits rs(8), rsi(8);
	308	rs.Set(8,&fRegionalResponse[iReg]);
	309	for (Int_t i = 0; i < 4; i++) {
	310	if (i%2 == 0) {
	311	rsi[2i] = rs[2i+1];
	312	rsi[2i+1] = rs[2i];
	313	} else {
	314	rsi[2i] = rs[2i];
	315	rsi[2i+1] = rs[2i+1];
	316	}
	317	}
	318	UShort_t regRespInv = 0;
	319	rsi.Get(&regRespInv);
	320	return regRespInv;
	321	}