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 //*-- Author: Rachid Guernane (LPCCFd)
19 // GLOBAL TRIGGER IMPLEMENTATION
20 // INPUTS ARE REGIONAL RESPONSES
21 // OUTPUT IS A 12-BIT WORD
22 // 4 BITS PER TRIGGER LEVEL
24 #include "AliMUONGlobalTriggerBoard.h"
28 #include <Riostream.h>
30 ClassImp(AliMUONGlobalTriggerBoard)
32 //___________________________________________
33 AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard()
35 for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0;
38 //___________________________________________
39 AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard(const char *name, Int_t a) : AliMUONTriggerBoard(name, a)
41 for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0;
44 //___________________________________________
45 void AliMUONGlobalTriggerBoard::Mask(Int_t index, UShort_t mask)
47 // MASK GLOBAL TRIGGER BOARD INPUT index WITH VALUE mask
48 if ( index>=0 && index < 16 )
54 AliError(Form("Index %d out of bounds (max %d)",index,16));
58 //___________________________________________
59 void AliMUONGlobalTriggerBoard::Response()
61 // COMPUTE THE GLOBAL TRIGGER BOARD
62 // RESPONSE ACCORDING TO THE Algo() METHOD
63 /// output from global trigger algorithm
64 /// [+, -, LS, US] * [Hpt, Lpt]
65 /// transformed to [usHpt, usLpt, lsHpt, lsLpt, sHpt, sLpt] according
66 /// to Global Trigger Unit user manual
69 for (Int_t i=0;i<16;i++) t[i] = fRegionalResponse[i] & fMask[i];
73 for (Int_t i=0;i<4;i++)
77 for (Int_t j=0;j<rank;j++)
79 UShort_t lthres = Algo(t[2*j],t[2*j+1],"LPT");
81 UShort_t hthres = Algo(t[2*j],t[2*j+1],"HPT"); hthres <<= 4;
83 t[ip] = lthres | hthres;
90 UChar_t sLpt, sHpt, lsLpt, lsHpt, usLpt, usHpt;
91 sLpt = ((t[0] & 0xC) != 0);
92 sHpt = ((t[0] & 0xC0) != 0);
93 lsLpt = ((t[0] & 0x2) != 0);
94 lsHpt = ((t[0] & 0x20) != 0);
95 usLpt = ((t[0] & 0x1 ) != 0);
96 usHpt = ((t[0] & 0x10) != 0);
104 fResponse = sLpt | sHpt | lsLpt | lsHpt | usLpt |usHpt;
107 //___________________________________________
108 UShort_t AliMUONGlobalTriggerBoard::Algo(UShort_t i, UShort_t j, char *thres)
110 // GLOBAL TRIGGER ALGORITHM
111 TBits a(8), b(8); a.Set(8,&i); b.Set(8,&j);
113 TBits trg1(2), trg2(2), trg(2);
115 if (!strcmp(thres,"LPT"))
117 trg1[0] = a[2]; trg1[1] = a[3];
118 trg2[0] = b[2]; trg2[1] = b[3];
122 trg1[0] = a[6]; trg1[1] = a[7];
123 trg2[0] = b[6]; trg2[1] = b[7];
126 TBits trgLS1(1), trgUS1(1), trgLS2(1), trgUS2(1), trgLS(1), trgUS(1);
128 if (!strcmp(thres,"LPT"))
130 trgLS1[0] = a[1]; trgUS1[0] = a[0];
131 trgLS2[0] = b[1]; trgUS2[0] = b[0];
135 trgLS1[0] = a[5]; trgUS1[0] = a[4];
136 trgLS2[0] = b[5]; trgUS2[0] = b[4];
139 trgLS[0] = ( trg1[0] & trg2[0] ) | ( trg1[1] & trg2[1] ) | trgLS1[0] | trgLS2[0];
140 trgUS[0] = ( trg1[0] & trg2[1] ) | ( trg1[1] & trg2[0] ) | trgUS1[0] | trgUS2[0];
142 trg[0] = trg1[0] | trg2[0];
143 trg[1] = trg1[1] | trg2[1];
158 //___________________________________________
159 void AliMUONGlobalTriggerBoard::Scan(Option_t*) const
161 // PRINT GLOBAL TRIGGER OUTPUT
162 TBits w(8); w.Set(8,&fResponse);
170 Int_t iSP[2] = {0,0}, iSM[2] = {0,0}, iSU[2] = {0,0};
172 TBits a(2), n(2), p(2), u(2);
176 val = 1; n.Set(2,&val);
177 val = 2; p.Set(2,&val);
178 val = 3; u.Set(2,&val);
183 if (a==p) iSP[0] = 1;
184 else if (a==n) iSM[0] = 1;
185 else if (a==u) iSU[0] = 1;
190 if (a==p) iSP[1] = 1;
191 else if (a==n) iSM[1] = 1;
192 else if (a==u) iSU[1] = 1;
194 Int_t iPU[2] = {w[0],w[4]};
195 Int_t iPL[2] = {w[1],w[5]};
197 printf("============================================\n");
198 printf(" Global Trigger output Low pt High pt\n");
199 printf(" number of Single Plus :\t");
200 for (Int_t i=0; i<2; i++) printf("%i\t",iSP[i]);
202 printf(" number of Single Minus :\t");
203 for (Int_t i=0; i<2; i++) printf("%i\t",iSM[i]);
205 printf(" number of Single Undefined :\t");
206 for (Int_t i=0; i<2; i++) printf("%i\t",iSU[i]);
208 printf(" number of UnlikeSign pair :\t");
209 for (Int_t i=0; i<2; i++) printf("%i\t",iPU[i]);
211 printf(" number of LikeSign pair :\t");
212 for (Int_t i=0; i<2; i++) printf("%i\t",iPL[i]);
214 printf("===================================================\n");
218 ClassImp(AliMUONGlobalTriggerBoard)