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
24 /// \author Rachid Guernane (LPCCFd)
26 #include "AliMUONGlobalTriggerBoard.h"
30 #include <Riostream.h>
32 ClassImp(AliMUONGlobalTriggerBoard)
34 //___________________________________________
35 AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard()
37 for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0;
40 //___________________________________________
41 AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard(const char *name, Int_t a) : AliMUONTriggerBoard(name, a)
43 for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0;
46 //___________________________________________
47 void AliMUONGlobalTriggerBoard::Mask(Int_t index, UShort_t mask)
49 // MASK GLOBAL TRIGGER BOARD INPUT index WITH VALUE mask
50 if ( index>=0 && index < 16 )
56 AliError(Form("Index %d out of bounds (max %d)",index,16));
60 //___________________________________________
61 void AliMUONGlobalTriggerBoard::Response()
63 // COMPUTE THE GLOBAL TRIGGER BOARD
64 // RESPONSE ACCORDING TO THE Algo() METHOD
65 /// output from global trigger algorithm
66 /// [+, -, LS, US] * [Hpt, Lpt]
67 /// transformed to [usHpt, usLpt, lsHpt, lsLpt, sHpt, sLpt] according
68 /// to Global Trigger Unit user manual
71 for (Int_t i=0;i<16;i++) t[i] = fRegionalResponse[i] & fMask[i];
75 for (Int_t i=0;i<4;i++)
79 for (Int_t j=0;j<rank;j++)
81 UShort_t lthres = Algo(t[2*j],t[2*j+1],"LPT");
83 UShort_t hthres = Algo(t[2*j],t[2*j+1],"HPT"); hthres <<= 4;
85 t[ip] = lthres | hthres;
92 UChar_t sLpt, sHpt, lsLpt, lsHpt, usLpt, usHpt;
93 sLpt = ((t[0] & 0xC) != 0);
94 sHpt = ((t[0] & 0xC0) != 0);
95 lsLpt = ((t[0] & 0x2) != 0);
96 lsHpt = ((t[0] & 0x20) != 0);
97 usLpt = ((t[0] & 0x1 ) != 0);
98 usHpt = ((t[0] & 0x10) != 0);
106 fResponse = sLpt | sHpt | lsLpt | lsHpt | usLpt |usHpt;
109 //___________________________________________
110 UShort_t AliMUONGlobalTriggerBoard::Algo(UShort_t i, UShort_t j, char *thres)
112 // GLOBAL TRIGGER ALGORITHM
113 TBits a(8), b(8); a.Set(8,&i); b.Set(8,&j);
115 TBits trg1(2), trg2(2), trg(2);
117 if (!strcmp(thres,"LPT"))
119 trg1[0] = a[2]; trg1[1] = a[3];
120 trg2[0] = b[2]; trg2[1] = b[3];
124 trg1[0] = a[6]; trg1[1] = a[7];
125 trg2[0] = b[6]; trg2[1] = b[7];
128 TBits trgLS1(1), trgUS1(1), trgLS2(1), trgUS2(1), trgLS(1), trgUS(1);
130 if (!strcmp(thres,"LPT"))
132 trgLS1[0] = a[1]; trgUS1[0] = a[0];
133 trgLS2[0] = b[1]; trgUS2[0] = b[0];
137 trgLS1[0] = a[5]; trgUS1[0] = a[4];
138 trgLS2[0] = b[5]; trgUS2[0] = b[4];
141 trgLS[0] = ( trg1[0] & trg2[0] ) | ( trg1[1] & trg2[1] ) | trgLS1[0] | trgLS2[0];
142 trgUS[0] = ( trg1[0] & trg2[1] ) | ( trg1[1] & trg2[0] ) | trgUS1[0] | trgUS2[0];
144 trg[0] = trg1[0] | trg2[0];
145 trg[1] = trg1[1] | trg2[1];
160 //___________________________________________
161 void AliMUONGlobalTriggerBoard::Scan(Option_t*) const
163 // PRINT GLOBAL TRIGGER OUTPUT
164 TBits w(8); w.Set(8,&fResponse);
172 Int_t iSP[2] = {0,0}, iSM[2] = {0,0}, iSU[2] = {0,0};
174 TBits a(2), n(2), p(2), u(2);
178 val = 1; n.Set(2,&val);
179 val = 2; p.Set(2,&val);
180 val = 3; u.Set(2,&val);
185 if (a==p) iSP[0] = 1;
186 else if (a==n) iSM[0] = 1;
187 else if (a==u) iSU[0] = 1;
192 if (a==p) iSP[1] = 1;
193 else if (a==n) iSM[1] = 1;
194 else if (a==u) iSU[1] = 1;
196 Int_t iPU[2] = {w[0],w[4]};
197 Int_t iPL[2] = {w[1],w[5]};
199 printf("============================================\n");
200 printf(" Global Trigger output Low pt High pt\n");
201 printf(" number of Single Plus :\t");
202 for (Int_t i=0; i<2; i++) printf("%i\t",iSP[i]);
204 printf(" number of Single Minus :\t");
205 for (Int_t i=0; i<2; i++) printf("%i\t",iSM[i]);
207 printf(" number of Single Undefined :\t");
208 for (Int_t i=0; i<2; i++) printf("%i\t",iSU[i]);
210 printf(" number of UnlikeSign pair :\t");
211 for (Int_t i=0; i<2; i++) printf("%i\t",iPU[i]);
213 printf(" number of LikeSign pair :\t");
214 for (Int_t i=0; i<2; i++) printf("%i\t",iPL[i]);
216 printf("===================================================\n");
220 ClassImp(AliMUONGlobalTriggerBoard)