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
24 /// \todo Change member functions comments in capital letters to normal text
26 /// \author Rachid Guernane (LPCCFd)
27 //-----------------------------------------------------------------------------
29 #include "AliMUONGlobalTriggerBoard.h"
33 #include <Riostream.h>
35 ClassImp(AliMUONGlobalTriggerBoard)
37 //___________________________________________
38 AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard()
40 /// Default constructor
42 for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0;
45 //___________________________________________
46 AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard(const char *name, Int_t a) : AliMUONTriggerBoard(name, a)
48 /// Standard constructor
50 for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0;
53 //___________________________________________
54 AliMUONGlobalTriggerBoard::~AliMUONGlobalTriggerBoard()
59 //___________________________________________
60 void AliMUONGlobalTriggerBoard::Mask(Int_t index, UShort_t mask)
62 /// MASK GLOBAL TRIGGER BOARD INPUT index WITH VALUE mask
63 if ( index>=0 && index < 16 )
69 AliError(Form("Index %d out of bounds (max %d)",index,16));
73 //___________________________________________
74 void AliMUONGlobalTriggerBoard::Response()
76 /// COMPUTE THE GLOBAL TRIGGER BOARD
77 /// RESPONSE ACCORDING TO THE Algo() METHOD
78 // output from global trigger algorithm
79 // [+, -, LS, US] * [Hpt, Lpt]
80 // transformed to [usHpt, usLpt, lsHpt, lsLpt, sHpt, sLpt] according
81 // to Global Trigger Unit user manual
84 for (Int_t i=0;i<16;i++) t[i] = fRegionalResponse[i] & fMask[i];
88 for (Int_t i=0;i<4;i++)
92 for (Int_t j=0;j<rank;j++)
94 UShort_t lthres = Algo(t[2*j],t[2*j+1],"LPT");
96 UShort_t hthres = Algo(t[2*j],t[2*j+1],"HPT"); hthres <<= 4;
98 t[ip] = lthres | hthres;
105 UChar_t sLpt, sHpt, lsLpt, lsHpt, usLpt, usHpt;
106 sLpt = ((t[0] & 0xC) != 0);
107 sHpt = ((t[0] & 0xC0) != 0);
108 lsLpt = ((t[0] & 0x2) != 0);
109 lsHpt = ((t[0] & 0x20) != 0);
110 usLpt = ((t[0] & 0x1 ) != 0);
111 usHpt = ((t[0] & 0x10) != 0);
119 fResponse = sLpt | sHpt | lsLpt | lsHpt | usLpt |usHpt;
122 //___________________________________________
123 UShort_t AliMUONGlobalTriggerBoard::Algo(UShort_t i, UShort_t j, char *thres)
125 /// GLOBAL TRIGGER ALGORITHM
126 TBits a(8), b(8); a.Set(8,&i); b.Set(8,&j);
128 TBits trg1(2), trg2(2), trg(2);
130 if (!strcmp(thres,"LPT"))
132 trg1[0] = a[2]; trg1[1] = a[3];
133 trg2[0] = b[2]; trg2[1] = b[3];
137 trg1[0] = a[6]; trg1[1] = a[7];
138 trg2[0] = b[6]; trg2[1] = b[7];
141 TBits trgLS1(1), trgUS1(1), trgLS2(1), trgUS2(1), trgLS(1), trgUS(1);
143 if (!strcmp(thres,"LPT"))
145 trgLS1[0] = a[1]; trgUS1[0] = a[0];
146 trgLS2[0] = b[1]; trgUS2[0] = b[0];
150 trgLS1[0] = a[5]; trgUS1[0] = a[4];
151 trgLS2[0] = b[5]; trgUS2[0] = b[4];
154 trgLS[0] = ( trg1[0] & trg2[0] ) | ( trg1[1] & trg2[1] ) | trgLS1[0] | trgLS2[0];
155 trgUS[0] = ( trg1[0] & trg2[1] ) | ( trg1[1] & trg2[0] ) | trgUS1[0] | trgUS2[0];
157 trg[0] = trg1[0] | trg2[0];
158 trg[1] = trg1[1] | trg2[1];
173 //___________________________________________
174 void AliMUONGlobalTriggerBoard::Scan(Option_t*) const
176 /// PRINT GLOBAL TRIGGER OUTPUT
177 TBits w(8); w.Set(8,&fResponse);
185 Int_t iSP[2] = {0,0}, iSM[2] = {0,0}, iSU[2] = {0,0};
187 TBits a(2), n(2), p(2), u(2);
191 val = 1; n.Set(2,&val);
192 val = 2; p.Set(2,&val);
193 val = 3; u.Set(2,&val);
198 if (a==p) iSP[0] = 1;
199 else if (a==n) iSM[0] = 1;
200 else if (a==u) iSU[0] = 1;
205 if (a==p) iSP[1] = 1;
206 else if (a==n) iSM[1] = 1;
207 else if (a==u) iSU[1] = 1;
209 Int_t iPU[2] = {w[0],w[4]};
210 Int_t iPL[2] = {w[1],w[5]};
212 printf("============================================\n");
213 printf(" Global Trigger output Low pt High pt\n");
214 printf(" number of Single Plus :\t");
215 for (Int_t i=0; i<2; i++) printf("%i\t",iSP[i]);
217 printf(" number of Single Minus :\t");
218 for (Int_t i=0; i<2; i++) printf("%i\t",iSM[i]);
220 printf(" number of Single Undefined :\t");
221 for (Int_t i=0; i<2; i++) printf("%i\t",iSU[i]);
223 printf(" number of UnlikeSign pair :\t");
224 for (Int_t i=0; i<2; i++) printf("%i\t",iPU[i]);
226 printf(" number of LikeSign pair :\t");
227 for (Int_t i=0; i<2; i++) printf("%i\t",iPL[i]);
229 printf("===================================================\n");
233 ClassImp(AliMUONGlobalTriggerBoard)