+//_____________________________________________________________________________
+Int_t AliAltroRawStream::ReadRCUTrailer(Int_t &index, Int_t trailerSize)
+{
+ // The method decodes the RCU trailer data
+ // according to the RCU fw ver.2 specs
+
+ fRCUTrailerSize = trailerSize*4;
+
+ for (trailerSize -= 2; trailerSize > 0; trailerSize--) {
+ Int_t word = Get32bitWord(index);
+ Int_t parCode = word >> 26;
+ Int_t parData = word & 0x3FFFFFF;
+ switch (parCode) {
+ case 1:
+ // ERR_REG1
+ fFECERRA = ((parData >> 13) & 0x1FFF) << 7;
+ fFECERRB = ((parData & 0x1FFF)) << 7;
+ break;
+ case 2:
+ // ERR_REG2
+ fERRREG2 = parData & 0x1FF;
+ break;
+ case 3:
+ // ERR_REG3
+ fERRREG3 = parData & 0xFFF;
+ break;
+ case 4:
+ // ERR_REG4
+ fERRREG4 = parData & 0xFFF;
+ break;
+ case 5:
+ // FEC_RO_A
+ fActiveFECsA = parData & 0xFFFF;
+ break;
+ case 6:
+ // FEC_RO_B
+ fActiveFECsB = parData & 0xFFFF;
+ break;
+ case 7:
+ // RDO_CFG1
+ fAltroCFG1 = parData & 0xFFFFF;
+ break;
+ case 8:
+ // RDO_CFG2
+ fAltroCFG2 = parData & 0x1FFFFFF;
+ break;
+ default:
+ fRawReader->AddMinorErrorLog(kRCUTrailerErr,"undef word");
+ AliWarning(Form("Undefined parameter code %d, ignore it !",
+ parCode));
+ break;
+ }
+ }
+
+ if (index < 4) {
+ fRawReader->AddMajorErrorLog(kRCUTrailerErr,Form("tr=%d raw=%d bytes",
+ fRCUTrailerSize,
+ fRawReader->GetDataSize()));
+ AliWarning(Form("Invalid trailer size found (%d bytes) ! The size is bigger than the raw data size (%d bytes)!",
+ fRCUTrailerSize,
+ fRawReader->GetDataSize()));
+ }
+ fRCUTrailerData = fData + index;
+
+ Int_t position = Get32bitWord(index);
+
+
+ return position;
+}
+
+//_____________________________________________________________________________
+Double_t AliAltroRawStream::GetTSample() const
+{
+ // Returns the sampling time
+ // in seconds. In case the rcu trailer
+ // was note read, return an invalid number (0)
+
+ if (!fRCUTrailerData) return 0.;
+
+ const Double_t kLHCTimeSample = 25.0e-9; // LHC clocks runs at 40 MHz
+ UChar_t fq = (fAltroCFG2 >> 5) & 0xF;
+ Double_t tSample;
+ switch (fq) {
+ case 0:
+ // 20 MHz
+ tSample = 2.0*kLHCTimeSample;
+ break;
+ case 1:
+ // 10 Mhz
+ tSample = 4.0*kLHCTimeSample;
+ break;
+ case 2:
+ // 5 MHz
+ tSample = 8.0*kLHCTimeSample;
+ break;
+ default:
+ AliWarning(Form("Invalid sampling frequency value %d !",
+ fq));
+ tSample = 0.;
+ break;
+ }
+
+ return tSample;
+}
+
+//_____________________________________________________________________________
+Double_t AliAltroRawStream::GetL1Phase() const
+{
+ // Returns the L1 phase w.r.t to the
+ // LHC clock
+ if (!fRCUTrailerData) return 0.;
+
+ const Double_t kLHCTimeSample = 25.0e-9; // LHC clocks runs at 40 MHz
+ Double_t phase = ((Double_t)(fAltroCFG2 & 0x1F))*kLHCTimeSample;
+
+ Double_t tSample = GetTSample();
+ if (phase >= tSample) {
+ AliWarning(Form("Invalid L1 trigger phase (%f >= %f) !",
+ phase,tSample));
+ phase = 0.;
+ }
+
+ return phase;
+}
+
+//_____________________________________________________________________________
+void AliAltroRawStream::PrintRCUTrailer() const
+{
+ // Prints the contents of
+ // the RCU trailer data
+ printf("RCU trailer:\n===========\n");
+ printf("FECERRA: 0x%x\nFECERRB: 0x%x\n",fFECERRA,fFECERRB);
+ printf("ERRREG2: 0x%x\n",fERRREG2);
+ printf("#channels skipped due to address mismatch: %d\n",GetNChAddrMismatch());
+ printf("#channels skipped due to bad block length: %d\n",GetNChLengthMismatch());
+ printf("Active FECs (branch A): 0x%x\nActive FECs (branch B): 0x%x\n",fActiveFECsA,fActiveFECsB);
+ printf("Baseline corr: 0x%x\n",GetBaselineCorr());
+ printf("Number of presamples: %d\nNumber of postsamples: %d\n",GetNPresamples(),GetNPostsamples());
+ printf("Second baseline corr: %d\n",GetSecondBaselineCorr());
+ printf("GlitchFilter: %d\n",GetGlitchFilter());
+ printf("Number of non-ZS postsamples: %d\nNumber of non-ZS presamples: %d\n",GetNNonZSPostsamples(),GetNNonZSPresamples());
+ printf("Number of ALTRO buffers: %d\n",GetNAltroBuffers());
+ printf("Number of pretrigger samples: %d\n",GetNPretriggerSamples());
+ printf("Number of samples per channel: %d\n",GetNSamplesPerCh());
+ printf("Sparse readout: %d\n",GetSparseRO());
+ printf("Sampling time: %e s\n",GetTSample());
+ printf("L1 Phase: %e s\n",GetL1Phase());
+ printf("AltroCFG1: 0x%x\nAltroCFG2: 0x%x\n",GetAltroCFG1(),GetAltroCFG2());
+ printf("===========\n");
+}
+