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/** @file |
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* $Source: /afs/ba.infn.it/user/pamela/src/CVS/yoda/techmodel/McmdReader.cpp,v $ |
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* $Id: McmdReader.cpp,v 6.2 2006/05/30 19:10:03 kusanagi Exp $ |
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* $Author: kusanagi $ |
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* |
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* Implementation of the McmdReader class. |
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*/ |
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|
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extern "C" { |
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#include "CRC.h" |
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} |
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#include "ReaderAlgorithms.h" |
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using namespace pamela::techmodel; |
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|
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static log4cxx::LoggerPtr logger = log4cxx::Logger::getLogger(_T("pamela.techmodel.McmdReader")); |
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static std::stringstream oss; |
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/** |
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* Constructor. |
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*/ |
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McmdReader::McmdReader(void): |
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TechmodelAlgorithm(PacketType::Mcmd, "Mcmd") { |
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logger->debug(_T("Constructor")); |
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Mcmd = new McmdEvent(); |
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} |
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|
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/** |
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* Get a string with the version info of the algorithm. |
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*/ |
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std::string McmdReader::GetVersionInfo(void) const { |
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return |
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"$Header: /afs/ba.infn.it/user/pamela/src/CVS/yoda/techmodel/McmdReader.cpp,v 6.2 2006/05/30 19:10:03 kusanagi Exp $\n"; |
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} |
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|
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/** |
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* Initialize the algorithm with a special run. This will initialize the |
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* event reader routines for all packet types. |
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*/ |
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void McmdReader::Init(PamelaRun *run) { |
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logger->debug(_T("Initialize")); |
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SetInputStream(run); |
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run->WriteSubPacket(this, &Mcmd, Mcmd->Class()); |
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} |
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|
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/** |
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* Unpack the Mcmd event from an input file. |
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* Each subpacket is prafaceded by 4 OBT bytes. |
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* The elementar structure is a kind of |
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* --------CPU - OBT--------------------------------- |
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* OBT - 4 Bytes |
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* --------Start Sub-Packet--------------------------------- |
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* SeqID - 2 Bytes |
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* T - 1 bit | spare - 7 bits | Mcmd-ID - 1 byte |
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* Spare - 4 bits | Mcmd Lenght 12 bits |
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* Time Tag - 4 Bytes |
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* DATA - McmdLength * 2 Bytes |
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* don't care - 1 Byte |
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* END-ID - 1 Byte is the sum of subPacket Bytes module 256 |
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* --------End Sub-Packet--------------------------------- |
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* --------CPU CRC-16 on OBT + subPacket--------------------------------- |
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* subCRC - 2 Bytes |
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* this structure is repeated one or more times. |
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* The last 2 Bytes are CRC16 computed by CPU on all previous (OBT + subpacket data + subCRC) repetitions |
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|
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* @Event Number |
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* @length is the size in bytes of the event (or packet) |
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*/ |
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void McmdReader::RunEvent(int EventNumber, long int length) throw (WrongCRCException){ |
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|
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int i = 0; |
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char OBT[4]; |
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char subHeader[10]; |
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char *subData; |
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char subTrailer[2]; |
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char subPckCRC[2]; |
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char eventCRC[2]; |
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long int start; |
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unsigned short headerCRC; |
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UINT16 subCRC; //CRC of the subpacket (updated as subPckt is read) |
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UINT16 readCRC; //CRC read from the subpacket |
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UINT16 partialCRC; //partial CRC updated as mcmd packet is read (to compare with CRC read in the total Mcmd header) |
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|
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long int lastPosition, dataLength; |
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McmdRecord *rec; |
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|
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//the 2 bytes subtracted belong to the final event CRC bytes |
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lastPosition = (long int)InputFile->tellg() + length - 2; |
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Mcmd->Records->Clear(); |
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TClonesArray &recs = *(Mcmd->Records); |
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partialCRC = 0; |
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while(InputFile->tellg() < lastPosition) { |
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|
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//Just to test crc |
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/* char tempbuff[length]; |
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InputFile->read(tempbuff, sizeof(tempbuff)); |
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subCRC = 0; |
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for (int jj = 0; jj < length ; jj++){ |
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subCRC = CM_Compute_CRC16(subCRC, (BYTE*)(tempbuff+jj), 1); |
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}*/ |
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|
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//Read the OBT preceeding the subpacket then calculate a partial CRC for it |
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//and update the partialCRC |
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start = InputFile->tellg(); |
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InputFile->read(OBT, sizeof(OBT)); |
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subCRC = CM_Compute_CRC16(0, (BYTE*)&OBT, 4); |
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partialCRC = CM_Compute_CRC16(partialCRC, (BYTE*)&OBT, 4); |
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|
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//Read the header for the subPacket and read mcmdLength |
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//12 is the total lenght of subHeader + subTrailer |
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InputFile->read(subHeader, sizeof(subHeader)); |
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subCRC = CM_Compute_CRC16(subCRC, (BYTE*)&subHeader, 10); |
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partialCRC = CM_Compute_CRC16(partialCRC, (BYTE*)&subHeader, 10); |
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dataLength = (((0x0fff)&((UINT16)subHeader[4]))<<8|((UINT16)subHeader[5])*2) - 12; |
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|
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if (dataLength < 0) break; //it should throw an exception ***TBD*** |
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//read subpacket data according to data length then calculate partial CRC for data |
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//and update the partialCRC |
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|
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// If dataLength > 0 reads the data and compute again a partial CRC |
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// else set subData to 0 |
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//if(dataLength > 0){ |
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subData = new char[dataLength]; |
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memset(subData, 0, dataLength*sizeof(char)); |
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InputFile->read(subData, sizeof(unsigned char)*dataLength); |
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for (int jj = 0; jj < dataLength ; jj++){ |
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subCRC = CM_Compute_CRC16(subCRC, (BYTE*)(subData+jj), 1); |
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partialCRC = CM_Compute_CRC16(partialCRC, (BYTE*)(subData+jj), 1); |
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} |
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//subCRC = CM_Compute_CRC16(subCRC, (BYTE*)&subData, dataLength); |
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|
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//} else { |
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// subData = "0"; |
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//} |
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|
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//Read the CRC inside of MCMD |
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//To check sum of all sub packet data, module 256 ****TBD**** |
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InputFile->read(subTrailer, sizeof(subTrailer)); |
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subCRC = CM_Compute_CRC16(subCRC, (BYTE*)&subTrailer, 2); |
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partialCRC = CM_Compute_CRC16(partialCRC, (BYTE*)&subTrailer, 2); |
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|
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//Read the CRC of subPacket |
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InputFile->read(subPckCRC, sizeof(subPckCRC)); |
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partialCRC = CM_Compute_CRC16(partialCRC, (BYTE*)&subPckCRC, 2); |
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readCRC = (((BYTE)subPckCRC[0])<<8) + ((BYTE)subPckCRC[1]); |
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|
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//finally check if the RecordCRC is correct |
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//and finally update the partialCRC |
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//TO DO - if one CRC is wrong also the total one will be corrupted |
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if (subCRC == readCRC){ |
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rec = new(recs[i++]) McmdRecord(); //aggiungo un nuovo McmdRecord all'evento |
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rec->MCMD_RECORD_OBT = (((UINT32)OBT[0]<<24)&0xFF000000) + (((UINT32)OBT[1]<<16)&0x00FF0000) + (((UINT32)OBT[2]<<8)&0x0000FF00) + (((UINT32)OBT[3])&0x000000FF); |
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rec->SeqID = (((BYTE)subHeader[0]<<8)&0xFF00) + (((BYTE)subHeader[1])&0x00FF); |
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rec->Tbit = ((BYTE)((subHeader[2]&0x80))>>7); |
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rec->ID1 = (BYTE)subHeader[3]; |
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rec->McmdLength = (0x0fff)&(((UINT16)(subHeader[4]<<8)) + ((UINT16)subHeader[5])); |
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rec->TimeTag = (((UINT32)OBT[6]<<24)&0xFF000000) + (((UINT32)OBT[7]<<16)&0x00FF0000) + (((UINT32)OBT[8]<<8)&0x0000FF00) + (((UINT32)OBT[9])&0x000000FF); |
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rec->endID = (BYTE)subTrailer[1]; |
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|
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rec->McmdData = new TArrayC(dataLength, subData); |
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delete [] subData; |
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} else { |
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oss.str(""); |
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oss << "Wrong CRC on Subpacket internal to TMTC Packet starting at position" |
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<< start; |
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logger->warn(oss.str().c_str()); |
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} |
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} |
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//in the end compare the calculated partial CRC with the MCMD packet CRC |
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InputFile->read(eventCRC, sizeof(eventCRC)); |
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readCRC = (((UINT16)(eventCRC[0]<<8))&0xFF00) + (((UINT16)eventCRC[1])&0x00FF); |
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|
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if(partialCRC != readCRC) throw WrongCRCException(" Wrong Global CRC for MCMD Packet "); |
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/*if(!(partialCRC == readCRC)) { |
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throw WrongCRCException(); |
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}*/ |
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} |
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