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 **************************************************************************/
17 /// \class AliMUONPayloadTracker
18 /// Decodes rawdata from buffer and stores in TClonesArray.
19 /// First version implement for Tracker
21 /// \author Christian Finck
23 #include "AliMUONPayloadTracker.h"
25 #include "AliMUONDspHeader.h"
26 #include "AliMUONBlockHeader.h"
27 #include "AliMUONBusStruct.h"
28 #include "AliMUONDDLTracker.h"
33 ClassImp(AliMUONPayloadTracker)
36 AliMUONPayloadTracker::AliMUONPayloadTracker()
45 fDDLTracker(new AliMUONDDLTracker()),
46 fBusStruct(new AliMUONBusStruct()),
47 fBlockHeader(new AliMUONBlockHeader()),
48 fDspHeader(new AliMUONDspHeader()),
54 /// create an object to decode MUON payload
59 //___________________________________
60 AliMUONPayloadTracker::~AliMUONPayloadTracker()
71 //______________________________________________________
72 Bool_t AliMUONPayloadTracker::Decode(UInt_t* buffer, Int_t totalDDLSize)
75 /// Each DDL is made with 2 Blocks each of which consists of 5 DSP's at most
76 /// and each of DSP has at most 5 buspatches.
77 /// The different structures, Block (CRT), DSP (FRT) and Buspatch,
78 /// are identified by a key word 0xFC0000FC, 0xF000000F and 0xB000000B respectively.
79 /// (fBusPatchManager no more needed !)
82 //Read Header Size of DDL,Block,DSP and BusPatch
83 static Int_t kBlockHeaderSize = fBlockHeader->GetHeaderLength();
84 static Int_t kDspHeaderSize = fDspHeader->GetHeaderLength();
85 static Int_t kBusPatchHeaderSize = fBusStruct->GetHeaderLength();
90 Int_t totalBusPatchSize;
102 while (buffer[index] == fBlockHeader->GetDefaultDataKey()) {
104 if (iBlock > fMaxBlock) break;
106 // copy within padding words
107 memcpy(fBlockHeader->GetHeader(),&buffer[index], (kBlockHeaderSize)*4);
109 totalBlockSize = fBlockHeader->GetTotalLength();
112 index += kBlockHeaderSize;
114 // copy in TClonesArray
115 fDDLTracker->AddBlkHeader(*fBlockHeader);
119 while (buffer[index] == fDspHeader->GetDefaultDataKey()) {
121 if (iDsp > fMaxDsp) break; // if ever...
123 memcpy(fDspHeader->GetHeader(),&buffer[index], kDspHeaderSize*4);
125 totalDspSize = fDspHeader->GetTotalLength();
127 if (fDspHeader->GetErrorWord()) {
128 fDspHeader->Print("");
129 if (fDspHeader->GetErrorWord() == (0x000000B1 | fBlockHeader->GetDspId())){
130 // an event with a glitch in the readout has been detected
131 // it means that somewhere a 1 byte word has been randomly inserted
132 // all the readout sequence is shifted untill the next event
134 AliWarning(Form("Glitch in data detected, skipping event "));
142 index += kDspHeaderSize;
144 // copy in TClonesArray
145 fDDLTracker->AddDspHeader(*fDspHeader, iBlock);
147 // buspatch structure
149 while (buffer[index] == fBusStruct->GetDefaultDataKey()) {
151 if (iBusPatch > fMaxBus) break; // if ever
153 //copy buffer into header structure
154 memcpy(fBusStruct->GetHeader(), &buffer[index], kBusPatchHeaderSize*4);
156 totalBusPatchSize = fBusStruct->GetTotalLength();
157 indexBusPatch = index;
159 //Check Buspatch header, not empty events
160 if(totalBusPatchSize > kBusPatchHeaderSize) {
162 index += kBusPatchHeaderSize;
163 dataSize = fBusStruct->GetLength();
164 bufSize = fBusStruct->GetBufSize();
166 if(dataSize > 0) { // check data present
167 if (dataSize > bufSize) // check buffer size
168 fBusStruct->SetAlloc(dataSize);
170 //copy buffer into data structure
171 memcpy(fBusStruct->GetData(), &buffer[index], dataSize*4);
172 fBusStruct->SetBlockId(iBlock); // could be usefull in future applications ?
173 fBusStruct->SetDspId(iDsp);
176 if(!CheckDataParity())
177 AddParityErrBus(fBusStruct->GetBusPatchId());
179 // copy in TClonesArray
180 fDDLTracker->AddBusPatch(*fBusStruct, iBlock, iDsp);
184 } // testing buspatch
186 index = indexBusPatch + totalBusPatchSize;
187 if (index >= totalDDLSize) {// check the end of DDL
188 index = totalDDLSize - 1; // point to the last element of buffer
194 // skipping additionnal word if padding
195 if (fDspHeader->GetPaddingWord() == 1) {
196 if (buffer[index++] != fDspHeader->GetDefaultPaddingWord())
198 AliWarning(Form("Error in padding word for iBlock %d, iDsp %d, iBus %d\n",
199 iBlock, iDsp, iBusPatch));
204 index = indexDsp + totalDspSize;
205 if (index >= totalDDLSize) {
206 index = totalDDLSize - 1;
212 index = indexBlk + totalBlockSize;
213 if (index >= totalDDLSize) {
214 index = totalDDLSize - 1;
223 //______________________________________________________
224 void AliMUONPayloadTracker::ResetDDL()
226 /// reseting TClonesArray
229 fDDLTracker->GetBlkHeaderArray()->Delete();
232 fParityErrBus.Reset();
236 //______________________________________________________
237 void AliMUONPayloadTracker::SetMaxBlock(Int_t blk)
239 /// set regional card number
240 if (blk > 2) blk = 2;
244 //______________________________________________________
245 Bool_t AliMUONPayloadTracker::CheckDataParity()
248 /// taken from MuTrkBusPatch.cxx (sotfware test for CROCUS)
254 Int_t dataSize = fBusStruct->GetLength();
255 for (int idata = 0; idata < dataSize; idata++) {
257 data = fBusStruct->GetData(idata);
259 // Compute the parity for each data word
261 for (Int_t i = 1; i <= 30; i++)
262 parity ^= ((data >> i) & 0x1);
265 if (parity != fBusStruct->GetParity(idata)) {
267 AliWarning(Form("Parity error in word %d for manuId %d and channel %d\n",
268 idata, fBusStruct->GetManuId(idata), fBusStruct->GetChannelId(idata)));
277 //______________________________________________________
278 void AliMUONPayloadTracker::AddParityErrBus(Int_t buspatch)
280 /// adding bus with at least on parity error
281 fParityErrBus.Set(fParityErrBus.GetSize() + 1);
282 fParityErrBus.AddAt(buspatch, fParityErrBus.GetSize() - 1);