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 // Interface to the Altro format
19 // to read and write digits
20 // To be used in Alice Data Challenges
21 // and in the compression of the RAW data
23 #include "AliAltroBuffer.h"
24 #include "AliAltroMapping.h"
25 #include "AliRawDataHeaderSim.h"
27 #include "AliFstream.h"
31 ClassImp(AliAltroBuffer)
33 //_____________________________________________________________________________
34 AliAltroBuffer::AliAltroBuffer(const char* fileName, AliAltroMapping *mapping):
43 //the buffer is cleaned
44 for (Int_t i = 0; i < 5; i++) fBuffer[i] = 0;
46 //open the output file
47 fFile = new AliFstream(fileName);
51 //_____________________________________________________________________________
52 AliAltroBuffer::~AliAltroBuffer()
56 //Flush out the Buffer content at the end only if Buffer wasn't completely filled
58 if (fVerbose) Info("~AliAltroBuffer", "File Created");
64 //_____________________________________________________________________________
65 AliAltroBuffer::AliAltroBuffer(const AliAltroBuffer& source):
67 fShift(source.fShift),
68 fCurrentCell(source.fCurrentCell),
69 fFreeCellBuffer(source.fFreeCellBuffer),
70 fVerbose(source.fVerbose),
72 fDataHeaderPos(source.fDataHeaderPos),
73 fMapping(source.fMapping)
77 Fatal("AliAltroBuffer", "copy constructor not implemented");
80 //_____________________________________________________________________________
81 AliAltroBuffer& AliAltroBuffer::operator = (const AliAltroBuffer& /*source*/)
85 Fatal("operator =", "assignment operator not implemented");
89 //_____________________________________________________________________________
90 void AliAltroBuffer::Flush()
92 // Flushes the Buffer content
93 if (fFreeCellBuffer != 16) {
94 Int_t temp = fFreeCellBuffer;
95 for (Int_t i = 0; i < temp; i++){
101 //_____________________________________________________________________________
102 void AliAltroBuffer::FillBuffer(Int_t val)
104 //Fills the Buffer with 16 ten bits words and write into a file
106 if ((val > 0x3FF) || (val < 0)) {
107 Error("FillBuffer", "Value out of range (10 bits): %d", val);
112 fBuffer[fCurrentCell] |= (val << fShift);
118 fBuffer[fCurrentCell] |= (val >> (10 - fShift));
122 //Buffer is written into a file
123 fFile->WriteBuffer((char*)fBuffer, sizeof(UInt_t)*5);
125 for (Int_t j = 0; j < 5; j++) fBuffer[j] = 0;
128 fFreeCellBuffer = 16;
132 //_____________________________________________________________________________
133 void AliAltroBuffer::WriteTrailer(Int_t wordsNumber, Int_t padNumber,
134 Int_t rowNumber, Int_t secNumber)
136 //Writes a trailer of 40 bits
139 AliFatal("No ALTRO mapping information is loaded!");
142 Short_t hwAddress = fMapping->GetHWAddress(rowNumber,padNumber,secNumber);
144 AliFatal(Form("No hardware (ALTRO) adress found for these pad-row (%d) and pad (%d) indeces !",rowNumber,padNumber));
145 WriteTrailer(wordsNumber,hwAddress);
148 //_____________________________________________________________________________
149 void AliAltroBuffer::WriteTrailer(Int_t wordsNumber, Short_t hwAddress)
151 //Writes a trailer of 40 bits using
152 //a given hardware adress
153 Int_t num = fFreeCellBuffer % 4;
154 for(Int_t i = 0; i < num; i++) {
158 temp = hwAddress & 0x3FF;
161 temp = (wordsNumber << 6) & 0x3FF;
163 temp |= ((hwAddress >> 10) & 0x3);
167 temp |= ((wordsNumber & 0x3FF) >> 4);
174 //_____________________________________________________________________________
175 void AliAltroBuffer::WriteChannel(Int_t padNumber, Int_t rowNumber,
177 Int_t nTimeBins, const Int_t* adcValues,
180 //Write all ADC values and the trailer of a channel
181 Int_t nWords = WriteBunch(nTimeBins,adcValues,threshold);
183 if (nWords) WriteTrailer(nWords, padNumber, rowNumber, secNumber);
186 //_____________________________________________________________________________
187 void AliAltroBuffer::WriteChannel(Short_t hwAddress,
188 Int_t nTimeBins, const Int_t* adcValues,
191 //Write all ADC values and the trailer of a channel
192 Int_t nWords = WriteBunch(nTimeBins,adcValues,threshold);
194 if (nWords) WriteTrailer(nWords, hwAddress);
197 //_____________________________________________________________________________
198 Int_t AliAltroBuffer::WriteBunch(Int_t nTimeBins, const Int_t* adcValues,
201 //Write all ADC values
202 //Return number of words written
206 Int_t bunchLength = 0;
208 // loop over time bins
209 for (Int_t iTime = 0; iTime < nTimeBins; iTime++) {
210 if (adcValues[iTime] >= threshold) { // ADC value above threshold
211 FillBuffer(adcValues[iTime]);
216 } else if (timeBin >= 0) { // end of bunch
218 FillBuffer(bunchLength + 2);
225 if (timeBin >= 0) { // end of bunch
227 FillBuffer(bunchLength + 2);
234 //_____________________________________________________________________________
235 void AliAltroBuffer::WriteDataHeader(Bool_t dummy, Bool_t /*compressed*/)
237 //Write a (dummy or real) DDL data header,
238 //set the attributes according to the RCU version
240 AliRawDataHeaderSim header;
242 //if size=0 it means that this data header is a dummy data header
243 fDataHeaderPos = fFile->Tellp();
244 fFile->WriteBuffer((char*)(&header), sizeof(header));
246 UChar_t rcuVer = WriteRCUTrailer(0);
247 UInt_t currentFilePos = fFile->Tellp();
248 fFile->Seekp(fDataHeaderPos);
249 header.fSize = 0xFFFFFFFF; // RCU can't write raw-data size so we always get an 'invalid' size field
250 header.fAttributesSubDetectors |= (rcuVer << 24);
251 fFile->WriteBuffer((char*)(&header), sizeof(header));
252 fFile->Seekp(currentFilePos);
256 //_____________________________________________________________________________
257 UChar_t AliAltroBuffer::WriteRCUTrailer(Int_t rcuId)
259 // Writes the RCU trailer
260 // rcuId the is serial number of the corresponding
261 // RCU. The basic format of the trailer can be
262 // found in the RCU manual.
263 // This method should be called at the end of
266 UInt_t currentFilePos = fFile->Tellp();
267 UInt_t size = currentFilePos-fDataHeaderPos;
268 size -= sizeof(AliRawDataHeader);
270 if ((size % 5) != 0) {
271 AliFatal(Form("The current raw data payload is not a mutiple of 5 (%d) ! Can not write the RCU trailer !",size));
275 // Now put the size in unit of number of 40bit words
277 fFile->WriteBuffer((char *)(&size),sizeof(UInt_t));
279 // Now several not yet full defined fields
280 // In principle they are supposed to contain
281 // information about the sampling frequency,
282 // L1 phase, list of 'dead' FECs, etc.
284 // fFile->WriteBuffer((char *)(buffer),sizeof(UInt_t)*n);
286 // Now the RCU identifier and size of the trailer
287 // FOr the moment the triler size is 2 32-bit words
288 UInt_t buffer = (2 & 0x7F);
289 buffer |= ((rcuId & 0x1FF) << 7);
290 buffer |= 0xAAAA << 16;
291 fFile->WriteBuffer((char *)(&buffer),sizeof(UInt_t));