1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 /// \class AliMUONGlobalTriggerBoard
19 /// Global trigger implementation:
20 /// - inputs are regional responses
21 /// - output is a 12-bit word
22 /// - 4 bits per trigger level
23 /// \todo Change member functions comments in capital letters to normal text
25 /// \author Rachid Guernane (LPCCFd)
27 #include "AliMUONGlobalTriggerBoard.h"
31 #include <Riostream.h>
33 ClassImp(AliMUONGlobalTriggerBoard)
35 //___________________________________________
36 AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard()
38 /// Default constructor
40 for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0;
43 //___________________________________________
44 AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard(const char *name, Int_t a) : AliMUONTriggerBoard(name, a)
46 /// Standard constructor
48 for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0;
51 //___________________________________________
52 AliMUONGlobalTriggerBoard::~AliMUONGlobalTriggerBoard()
57 //___________________________________________
58 void AliMUONGlobalTriggerBoard::Mask(Int_t index, UShort_t mask)
60 /// MASK GLOBAL TRIGGER BOARD INPUT index WITH VALUE mask
61 if ( index>=0 && index < 16 )
67 AliError(Form("Index %d out of bounds (max %d)",index,16));
71 //___________________________________________
72 void AliMUONGlobalTriggerBoard::Response()
74 /// COMPUTE THE GLOBAL TRIGGER BOARD
75 /// RESPONSE ACCORDING TO THE Algo() METHOD
76 // output from global trigger algorithm
77 // [+, -, LS, US] * [Hpt, Lpt]
78 // transformed to [usHpt, usLpt, lsHpt, lsLpt, sHpt, sLpt] according
79 // to Global Trigger Unit user manual
82 for (Int_t i=0;i<16;i++) t[i] = fRegionalResponse[i] & fMask[i];
86 for (Int_t i=0;i<4;i++)
90 for (Int_t j=0;j<rank;j++)
92 UShort_t lthres = Algo(t[2*j],t[2*j+1],"LPT");
94 UShort_t hthres = Algo(t[2*j],t[2*j+1],"HPT"); hthres <<= 4;
96 t[ip] = lthres | hthres;
103 UChar_t sLpt, sHpt, lsLpt, lsHpt, usLpt, usHpt;
104 sLpt = ((t[0] & 0xC) != 0);
105 sHpt = ((t[0] & 0xC0) != 0);
106 lsLpt = ((t[0] & 0x2) != 0);
107 lsHpt = ((t[0] & 0x20) != 0);
108 usLpt = ((t[0] & 0x1 ) != 0);
109 usHpt = ((t[0] & 0x10) != 0);
117 fResponse = sLpt | sHpt | lsLpt | lsHpt | usLpt |usHpt;
120 //___________________________________________
121 UShort_t AliMUONGlobalTriggerBoard::Algo(UShort_t i, UShort_t j, char *thres)
123 /// GLOBAL TRIGGER ALGORITHM
124 TBits a(8), b(8); a.Set(8,&i); b.Set(8,&j);
126 TBits trg1(2), trg2(2), trg(2);
128 if (!strcmp(thres,"LPT"))
130 trg1[0] = a[2]; trg1[1] = a[3];
131 trg2[0] = b[2]; trg2[1] = b[3];
135 trg1[0] = a[6]; trg1[1] = a[7];
136 trg2[0] = b[6]; trg2[1] = b[7];
139 TBits trgLS1(1), trgUS1(1), trgLS2(1), trgUS2(1), trgLS(1), trgUS(1);
141 if (!strcmp(thres,"LPT"))
143 trgLS1[0] = a[1]; trgUS1[0] = a[0];
144 trgLS2[0] = b[1]; trgUS2[0] = b[0];
148 trgLS1[0] = a[5]; trgUS1[0] = a[4];
149 trgLS2[0] = b[5]; trgUS2[0] = b[4];
152 trgLS[0] = ( trg1[0] & trg2[0] ) | ( trg1[1] & trg2[1] ) | trgLS1[0] | trgLS2[0];
153 trgUS[0] = ( trg1[0] & trg2[1] ) | ( trg1[1] & trg2[0] ) | trgUS1[0] | trgUS2[0];
155 trg[0] = trg1[0] | trg2[0];
156 trg[1] = trg1[1] | trg2[1];
171 //___________________________________________
172 void AliMUONGlobalTriggerBoard::Scan(Option_t*) const
174 /// PRINT GLOBAL TRIGGER OUTPUT
175 TBits w(8); w.Set(8,&fResponse);
183 Int_t iSP[2] = {0,0}, iSM[2] = {0,0}, iSU[2] = {0,0};
185 TBits a(2), n(2), p(2), u(2);
189 val = 1; n.Set(2,&val);
190 val = 2; p.Set(2,&val);
191 val = 3; u.Set(2,&val);
196 if (a==p) iSP[0] = 1;
197 else if (a==n) iSM[0] = 1;
198 else if (a==u) iSU[0] = 1;
203 if (a==p) iSP[1] = 1;
204 else if (a==n) iSM[1] = 1;
205 else if (a==u) iSU[1] = 1;
207 Int_t iPU[2] = {w[0],w[4]};
208 Int_t iPL[2] = {w[1],w[5]};
210 printf("============================================\n");
211 printf(" Global Trigger output Low pt High pt\n");
212 printf(" number of Single Plus :\t");
213 for (Int_t i=0; i<2; i++) printf("%i\t",iSP[i]);
215 printf(" number of Single Minus :\t");
216 for (Int_t i=0; i<2; i++) printf("%i\t",iSM[i]);
218 printf(" number of Single Undefined :\t");
219 for (Int_t i=0; i<2; i++) printf("%i\t",iSU[i]);
221 printf(" number of UnlikeSign pair :\t");
222 for (Int_t i=0; i<2; i++) printf("%i\t",iPU[i]);
224 printf(" number of LikeSign pair :\t");
225 for (Int_t i=0; i<2; i++) printf("%i\t",iPL[i]);
227 printf("===================================================\n");
231 ClassImp(AliMUONGlobalTriggerBoard)