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 //-----------------------------------------------------------------------------
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
25 /// \author Rachid Guernane (LPCCFd),
26 /// Corrected by Christian Finck (Subatech)
27 //-----------------------------------------------------------------------------
29 #include "AliMUONGlobalTriggerBoard.h"
33 #include <Riostream.h>
36 ClassImp(AliMUONGlobalTriggerBoard)
39 //___________________________________________
40 AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard(): AliMUONTriggerBoard()
42 /// Default constructor
44 for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0;
47 //___________________________________________
48 AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard(const char *name, Int_t a) : AliMUONTriggerBoard(name, a)
50 /// Standard constructor
52 for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0;
55 //___________________________________________
56 AliMUONGlobalTriggerBoard::~AliMUONGlobalTriggerBoard()
61 //___________________________________________
62 void AliMUONGlobalTriggerBoard::Mask(Int_t index, UShort_t mask)
64 /// mask global trigger board input index with value mask
65 if ( index>=0 && index < 2 )
71 AliError(Form("Index %d out of bounds (max %d)",index,2));
75 //___________________________________________
76 void AliMUONGlobalTriggerBoard::Response()
78 /// compute the global trigger board
79 /// response according to the algo() method
80 // output from global trigger algorithm
81 // [+, -, LS, US] * [Hpt, Lpt]
82 // transformed to [usHpt, usLpt, lsHpt, lsLpt, sHpt, sLpt] according
83 // to Global Trigger Unit user manual
87 for (Int_t i = 0; i < 16; ++i)
91 UShort_t enable = !((fMask[index] >> shift) & 0x1);
93 t[i] = fRegionalResponse[i];
100 for (Int_t i=0;i<4;i++)
104 for (Int_t j=0;j<rank;j++)
106 UShort_t lthres = Algo(t[2*j],t[2*j+1],"LPT");
108 UShort_t hthres = Algo(t[2*j],t[2*j+1],"HPT"); hthres <<= 4;
110 t[ip] = lthres | hthres;
117 UChar_t sLpt, sHpt, lsLpt, lsHpt, usLpt, usHpt;
118 sLpt = ((t[0] & 0xC) != 0);
119 sHpt = ((t[0] & 0xC0) != 0);
120 lsLpt = ((t[0] & 0x2) != 0);
121 lsHpt = ((t[0] & 0x20) != 0);
122 usLpt = ((t[0] & 0x1 ) != 0);
123 usHpt = ((t[0] & 0x10) != 0);
131 fResponse = sLpt | sHpt | lsLpt | lsHpt | usLpt |usHpt;
134 //___________________________________________
135 UShort_t AliMUONGlobalTriggerBoard::Algo(UShort_t i, UShort_t j, char *thres)
137 /// global trigger algorithm
138 TBits a(8), b(8); a.Set(8,&i); b.Set(8,&j);
140 TBits trg1(2), trg2(2), trg(2);
142 if (!strcmp(thres,"LPT"))
144 trg1[0] = a[2]; trg1[1] = a[3];
145 trg2[0] = b[2]; trg2[1] = b[3];
149 trg1[0] = a[6]; trg1[1] = a[7];
150 trg2[0] = b[6]; trg2[1] = b[7];
153 TBits trgLS1(1), trgUS1(1), trgLS2(1), trgUS2(1), trgLS(1), trgUS(1);
155 if (!strcmp(thres,"LPT"))
157 trgLS1[0] = a[1]; trgUS1[0] = a[0];
158 trgLS2[0] = b[1]; trgUS2[0] = b[0];
162 trgLS1[0] = a[5]; trgUS1[0] = a[4];
163 trgLS2[0] = b[5]; trgUS2[0] = b[4];
166 trgLS[0] = ( trg1[0] & trg2[0] ) | ( trg1[1] & trg2[1] ) | trgLS1[0] | trgLS2[0];
167 trgUS[0] = ( trg1[0] & trg2[1] ) | ( trg1[1] & trg2[0] ) | trgUS1[0] | trgUS2[0];
169 trg[0] = trg1[0] | trg2[0];
170 trg[1] = trg1[1] | trg2[1];
185 //___________________________________________
186 void AliMUONGlobalTriggerBoard::Scan(Option_t*) const
188 /// print global trigger output
189 TBits w(8); w.Set(8,&fResponse);
197 Int_t iSP[2] = {0,0}, iSM[2] = {0,0}, iSU[2] = {0,0};
199 TBits a(2), n(2), p(2), u(2);
203 val = 1; n.Set(2,&val);
204 val = 2; p.Set(2,&val);
205 val = 3; u.Set(2,&val);
210 if (a==p) iSP[0] = 1;
211 else if (a==n) iSM[0] = 1;
212 else if (a==u) iSU[0] = 1;
217 if (a==p) iSP[1] = 1;
218 else if (a==n) iSM[1] = 1;
219 else if (a==u) iSU[1] = 1;
221 Int_t iPU[2] = {w[0],w[4]};
222 Int_t iPL[2] = {w[1],w[5]};
224 printf("============================================\n");
225 printf(" Global Trigger output Low pt High pt\n");
226 printf(" number of Single Plus :\t");
227 for (Int_t i=0; i<2; i++) printf("%i\t",iSP[i]);
229 printf(" number of Single Minus :\t");
230 for (Int_t i=0; i<2; i++) printf("%i\t",iSM[i]);
232 printf(" number of Single Undefined :\t");
233 for (Int_t i=0; i<2; i++) printf("%i\t",iSU[i]);
235 printf(" number of UnlikeSign pair :\t");
236 for (Int_t i=0; i<2; i++) printf("%i\t",iPU[i]);
238 printf(" number of LikeSign pair :\t");
239 for (Int_t i=0; i<2; i++) printf("%i\t",iPL[i]);
241 printf("===================================================\n");