]>
Commit | Line | Data |
---|---|---|
d15ca731 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
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 | **************************************************************************/ | |
15 | ||
16 | /* $Id$ */ | |
17 | ||
3d1463c8 | 18 | //----------------------------------------------------------------------------- |
c4ee792d | 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 | /// | |
c05673c9 | 25 | /// \author Rachid Guernane (LPCCFd), |
26 | /// Corrected by Christian Finck (Subatech) | |
3d1463c8 | 27 | //----------------------------------------------------------------------------- |
d15ca731 | 28 | |
29 | #include "AliMUONGlobalTriggerBoard.h" | |
41922e78 | 30 | #include "AliLog.h" |
d15ca731 | 31 | #include "TBits.h" |
32 | ||
33 | #include <Riostream.h> | |
34 | ||
c05673c9 | 35 | /// \cond CLASSIMP |
d15ca731 | 36 | ClassImp(AliMUONGlobalTriggerBoard) |
c05673c9 | 37 | /// \endcond |
d15ca731 | 38 | |
39 | //___________________________________________ | |
c05673c9 | 40 | AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard(): AliMUONTriggerBoard() |
d15ca731 | 41 | { |
71a2d3aa | 42 | /// Default constructor |
43 | ||
d15ca731 | 44 | for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0; |
41a38dec | 45 | for (Int_t i=0;i< 4;i++) fGlobalInput[i] = 0; |
f25f84f5 | 46 | for (Int_t i=0;i< 4;i++) fMask[i] = 0xffffffff; |
d15ca731 | 47 | } |
48 | ||
49 | //___________________________________________ | |
50 | AliMUONGlobalTriggerBoard::AliMUONGlobalTriggerBoard(const char *name, Int_t a) : AliMUONTriggerBoard(name, a) | |
51 | { | |
71a2d3aa | 52 | /// Standard constructor |
53 | ||
d15ca731 | 54 | for (Int_t i=0;i<16;i++) fRegionalResponse[i] = 0; |
41a38dec | 55 | for (Int_t i=0;i< 4;i++) fGlobalInput[i] = 0; |
f25f84f5 | 56 | for (Int_t i=0;i< 4;i++) fMask[i] = 0xffffffff; |
d15ca731 | 57 | } |
58 | ||
71a2d3aa | 59 | //___________________________________________ |
60 | AliMUONGlobalTriggerBoard::~AliMUONGlobalTriggerBoard() | |
61 | { | |
62 | /// Destructor | |
63 | } | |
64 | ||
41922e78 | 65 | //___________________________________________ |
41a38dec | 66 | void AliMUONGlobalTriggerBoard::Mask(Int_t index, UInt_t mask) |
41922e78 | 67 | { |
c05673c9 | 68 | /// mask global trigger board input index with value mask |
41a38dec | 69 | if ( index >= 0 && index < 4 ) |
41922e78 | 70 | { |
71 | fMask[index]=mask; | |
72 | } | |
73 | else | |
74 | { | |
41a38dec | 75 | AliError(Form("Index %d out of bounds (max %d)",index,3)); |
41922e78 | 76 | } |
77 | } | |
78 | ||
d15ca731 | 79 | //___________________________________________ |
80 | void AliMUONGlobalTriggerBoard::Response() | |
81 | { | |
c05673c9 | 82 | /// compute the global trigger board |
83 | /// response according to the algo() method | |
71a2d3aa | 84 | // output from global trigger algorithm |
254985cb | 85 | // [+, -, US, LS] * [Hpt, Lpt] |
71a2d3aa | 86 | // transformed to [usHpt, usLpt, lsHpt, lsLpt, sHpt, sLpt] according |
87 | // to Global Trigger Unit user manual | |
d15ca731 | 88 | |
8d4fefab | 89 | Int_t t[16]; |
d15ca731 | 90 | |
41a38dec | 91 | BuildGlobalInput(); |
f4e2cda2 | 92 | MaskGlobalInput(); |
41a38dec | 93 | |
c05673c9 | 94 | for (Int_t i = 0; i < 16; ++i) |
95 | { | |
41a38dec | 96 | t[i] = fRegionalResponse[i]; |
c05673c9 | 97 | } |
98 | ||
254985cb | 99 | |
d15ca731 | 100 | Int_t rank = 8; |
101 | ||
102 | for (Int_t i=0;i<4;i++) | |
103 | { | |
104 | Int_t ip = 0; | |
105 | ||
106 | for (Int_t j=0;j<rank;j++) | |
107 | { | |
ad705f30 | 108 | UShort_t lthres = Algo(t[2*j],t[2*j+1],"LPT"); |
d15ca731 | 109 | |
ad705f30 | 110 | UShort_t hthres = Algo(t[2*j],t[2*j+1],"HPT"); hthres <<= 4; |
d15ca731 | 111 | |
ad705f30 | 112 | t[ip] = lthres | hthres; |
d15ca731 | 113 | |
114 | ip++; | |
115 | } | |
116 | ||
117 | rank /= 2; | |
118 | } | |
8d4fefab | 119 | UChar_t sLpt, sHpt, lsLpt, lsHpt, usLpt, usHpt; |
120 | sLpt = ((t[0] & 0xC) != 0); | |
121 | sHpt = ((t[0] & 0xC0) != 0); | |
254985cb | 122 | lsLpt = ((t[0] & 0x1) != 0); |
254985cb | 123 | lsHpt = ((t[0] & 0x10) != 0); |
254985cb | 124 | usLpt = ((t[0] & 0x2 ) != 0); |
254985cb | 125 | usHpt = ((t[0] & 0x20) != 0); |
8d4fefab | 126 | |
f25f84f5 | 127 | // LSB is zero (trigger choice to send to CTP: sLpt or sHpt) |
128 | ||
129 | sLpt <<= 1; | |
130 | sHpt <<= 2; | |
131 | lsLpt <<= 3; | |
132 | lsHpt <<= 4; | |
133 | usLpt <<= 5; | |
134 | usHpt <<= 6; | |
8d4fefab | 135 | |
136 | fResponse = sLpt | sHpt | lsLpt | lsHpt | usLpt |usHpt; | |
254985cb | 137 | |
138 | ||
d15ca731 | 139 | } |
140 | ||
141 | //___________________________________________ | |
a6e0ebfe | 142 | UShort_t AliMUONGlobalTriggerBoard::Algo(UShort_t i, UShort_t j, const char *thres) |
d15ca731 | 143 | { |
254985cb | 144 | /// global trigger algorithm |
145 | /// a ,b = reg response = Hpt (+|-|us|ls) | Lpt (+|-|us|ls) | |
146 | ||
ad705f30 | 147 | TBits a(8), b(8); a.Set(8,&i); b.Set(8,&j); |
d15ca731 | 148 | |
149 | TBits trg1(2), trg2(2), trg(2); | |
150 | ||
ad705f30 | 151 | if (!strcmp(thres,"LPT")) |
d15ca731 | 152 | { |
153 | trg1[0] = a[2]; trg1[1] = a[3]; | |
154 | trg2[0] = b[2]; trg2[1] = b[3]; | |
155 | } | |
d15ca731 | 156 | else |
157 | { | |
ad705f30 | 158 | trg1[0] = a[6]; trg1[1] = a[7]; |
159 | trg2[0] = b[6]; trg2[1] = b[7]; | |
d15ca731 | 160 | } |
161 | ||
162 | TBits trgLS1(1), trgUS1(1), trgLS2(1), trgUS2(1), trgLS(1), trgUS(1); | |
163 | ||
ad705f30 | 164 | if (!strcmp(thres,"LPT")) |
d15ca731 | 165 | { |
254985cb | 166 | trgLS1[0] = a[0]; trgUS1[0] = a[1]; |
167 | trgLS2[0] = b[0]; trgUS2[0] = b[1]; | |
d15ca731 | 168 | } |
d15ca731 | 169 | else |
170 | { | |
254985cb | 171 | trgLS1[0] = a[4]; trgUS1[0] = a[5]; |
172 | trgLS2[0] = b[4]; trgUS2[0] = b[5]; | |
d15ca731 | 173 | } |
174 | ||
175 | trgLS[0] = ( trg1[0] & trg2[0] ) | ( trg1[1] & trg2[1] ) | trgLS1[0] | trgLS2[0]; | |
176 | trgUS[0] = ( trg1[0] & trg2[1] ) | ( trg1[1] & trg2[0] ) | trgUS1[0] | trgUS2[0]; | |
177 | ||
178 | trg[0] = trg1[0] | trg2[0]; | |
179 | trg[1] = trg1[1] | trg2[1]; | |
180 | ||
181 | TBits v(4); | |
182 | ||
254985cb | 183 | v[0] = trgLS[0]; |
184 | v[1] = trgUS[0]; | |
d15ca731 | 185 | v[2] = trg[0]; |
186 | v[3] = trg[1]; | |
187 | ||
188 | UShort_t rv = 0; | |
189 | v.Get(&rv); | |
190 | ||
191 | return rv; | |
192 | } | |
193 | ||
41a38dec | 194 | //___________________________________________ |
195 | void AliMUONGlobalTriggerBoard::BuildGlobalInput() | |
196 | { | |
197 | /// build the 4 words (32bits) global input from the regional responses | |
198 | /// the order of regional responses is: | |
199 | /// 1R, 2R, 2-3R, 3R, 4R, 5R, 6R, 7R, 1L, 2L, 2-3L, 3L, 4L, 5L, 6L, 7L | |
200 | ||
201 | for (Int_t i=0;i< 4;i++) fGlobalInput[i] = 0; | |
202 | ||
f4e2cda2 | 203 | UShort_t regRespInv; |
41a38dec | 204 | for (Int_t iReg = 0; iReg < 16; iReg++) { |
f4e2cda2 | 205 | |
a026ce9e | 206 | regRespInv = InvertPairBits(iReg); |
f4e2cda2 | 207 | |
41a38dec | 208 | if (iReg < 8) { // right |
209 | // Lpt word | |
f4e2cda2 | 210 | fGlobalInput[0] |= (regRespInv & 0x0F) << (4*iReg); |
41a38dec | 211 | // Hpt word |
f4e2cda2 | 212 | fGlobalInput[2] |= ((regRespInv & 0xF0) >> 4) << (4*iReg); |
41a38dec | 213 | } else { // left |
214 | // Lpt word | |
f4e2cda2 | 215 | fGlobalInput[1] |= (regRespInv & 0x0F) << (4*(iReg-8)); |
41a38dec | 216 | // Hpt word |
f4e2cda2 | 217 | fGlobalInput[3] |= ((regRespInv & 0xF0) >> 4) << (4*(iReg-8)); |
41a38dec | 218 | } |
219 | ||
220 | } | |
221 | ||
222 | } | |
223 | ||
224 | //___________________________________________ | |
f4e2cda2 | 225 | void AliMUONGlobalTriggerBoard::MaskGlobalInput() |
41a38dec | 226 | { |
227 | /// Apply masks to global input and recalculate regional inputs before | |
228 | /// applying the global response | |
229 | ||
41a38dec | 230 | UInt_t gitmp[4]; |
41a38dec | 231 | for (Int_t i = 0; i < 4; i++) { |
ce27c536 | 232 | fGlobalInput[i] &= fMask[i]; |
41a38dec | 233 | gitmp[i] = fGlobalInput[i]; |
41a38dec | 234 | } |
235 | ||
a026ce9e | 236 | RecomputeRegional(gitmp); |
237 | } | |
238 | ||
239 | ||
240 | //___________________________________________ | |
241 | void AliMUONGlobalTriggerBoard::RecomputeRegional(UInt_t gitmp[4]) | |
242 | { | |
243 | // | |
244 | /// Recomput regional response from global input | |
245 | // | |
41a38dec | 246 | for (Int_t iReg = 0; iReg < 16; iReg++) { |
247 | fRegionalResponse[iReg] = 0; | |
248 | if (iReg < 8) { // right | |
249 | // Lpt | |
250 | fRegionalResponse[iReg] |= (gitmp[0] >> (4*iReg)) & 0xF; | |
251 | // Hpt | |
252 | fRegionalResponse[iReg] |= ((gitmp[2] >> (4*iReg)) & 0xF) << 4; | |
253 | } else { // left | |
254 | // Lpt | |
255 | fRegionalResponse[iReg] |= (gitmp[1] >> (4*(iReg-8))) & 0xF; | |
256 | // Hpt | |
257 | fRegionalResponse[iReg] |= ((gitmp[3] >> (4*(iReg-8))) & 0xF) << 4; | |
258 | } | |
41a38dec | 259 | |
a026ce9e | 260 | fRegionalResponse[iReg] = InvertPairBits(iReg); |
261 | } | |
41a38dec | 262 | } |
263 | ||
d15ca731 | 264 | //___________________________________________ |
edd00c2d | 265 | void AliMUONGlobalTriggerBoard::Scan(Option_t*) const |
d15ca731 | 266 | { |
c05673c9 | 267 | /// print global trigger output |
f25f84f5 | 268 | TBits w(7); w.Set(7,&fResponse); |
d15ca731 | 269 | |
270 | // TRG[1:0] | |
271 | // 00 noth | |
272 | // 01 negative track | |
273 | // 10 positive track | |
274 | // 11 undef | |
275 | ||
bf309e6d | 276 | Int_t iS[2] = {0,0}; |
d15ca731 | 277 | |
f25f84f5 | 278 | iS[0] = (Int_t)w.TestBitNumber(1); |
279 | iS[1] = (Int_t)w.TestBitNumber(2); | |
d15ca731 | 280 | |
f25f84f5 | 281 | Int_t iPU[2] = {w[5],w[6]}; |
282 | Int_t iPL[2] = {w[3],w[4]}; | |
d15ca731 | 283 | |
ad705f30 | 284 | printf("============================================\n"); |
285 | printf(" Global Trigger output Low pt High pt\n"); | |
bf309e6d | 286 | printf(" number of Single :\t"); |
287 | for (Int_t i=0; i<2; i++) printf("%i\t",iS[i]); | |
d15ca731 | 288 | printf("\n"); |
289 | printf(" number of UnlikeSign pair :\t"); | |
ad705f30 | 290 | for (Int_t i=0; i<2; i++) printf("%i\t",iPU[i]); |
d15ca731 | 291 | printf("\n"); |
292 | printf(" number of LikeSign pair :\t"); | |
ad705f30 | 293 | for (Int_t i=0; i<2; i++) printf("%i\t",iPL[i]); |
d15ca731 | 294 | printf("\n"); |
295 | printf("===================================================\n"); | |
296 | printf("\n"); | |
297 | } | |
298 | ||
a026ce9e | 299 | |
300 | //___________________________________________ | |
301 | UShort_t AliMUONGlobalTriggerBoard::InvertPairBits(Int_t iReg) | |
302 | { | |
303 | // | |
304 | /// invert "pair" bits in regional response | |
305 | /// [+, -, US, LS] becomes [+, -, LS, US] | |
306 | // | |
307 | TBits rs(8), rsi(8); | |
308 | rs.Set(8,&fRegionalResponse[iReg]); | |
309 | for (Int_t i = 0; i < 4; i++) { | |
310 | if (i%2 == 0) { | |
311 | rsi[2*i] = rs[2*i+1]; | |
312 | rsi[2*i+1] = rs[2*i]; | |
313 | } else { | |
314 | rsi[2*i] = rs[2*i]; | |
315 | rsi[2*i+1] = rs[2*i+1]; | |
316 | } | |
317 | } | |
318 | UShort_t regRespInv = 0; | |
319 | rsi.Get(®RespInv); | |
320 | return regRespInv; | |
321 | } |