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#include "spwpacketreceiver.h"
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#include <QTime>
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#include "rmapoperations.h"
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spwpacketreceiver::spwpacketreceiver(QObject *parent) :
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QObject(parent)
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{
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rmapPacketSEMAPHORE = new QSemaphore;
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ccsdsPacketSEMAPHORE = new QSemaphore;
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rmapPacket = (char*) malloc(RMAP_MAX_PACKET_LENGTH);
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ccsdsPacket = (unsigned char*) malloc(CCSDS_MAX_PACKET_LENGTH);
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spwPacket = (char*) malloc( qMax(RMAP_MAX_PACKET_LENGTH, CCSDS_MAX_PACKET_LENGTH) );
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connect(this, SIGNAL(ccsdsPacketAvailable(unsigned char*,uint)), this, SLOT(processCCSDSPacket(unsigned char*,uint)));
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}
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spwpacketreceiver::~spwpacketreceiver()
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{
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free(rmapPacket);
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free(ccsdsPacket);
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free(spwPacket);
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}
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int spwpacketreceiver::receiveSPWPacket(unsigned char requestID) // SLOT
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{
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QTime spwPacketReceiverTimeout;
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// GRESB HEADER
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char RES_TR_EP; // 6 bits REserved + 1 bit TRuncated + 1 bit EP error end of packet
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unsigned char packetLength2;
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unsigned char packetLength1;
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unsigned char packetLength0;
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unsigned int packetLength;
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if (requestID==1)
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{
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if (rmapPacketSEMAPHORE->available()) return rmapPacketSize;
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}
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gresbReceptionSocket->blockSignals(1); // block the signals of the socket during packet reception
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// READ THE GRESB HEADER OF THE INCOMING PACKET
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spwPacketReceiverTimeout.start();
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while(gresbReceptionSocket->bytesAvailable() < 4)
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{
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gresbReceptionSocket->waitForReadyRead(100);
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if(spwPacketReceiverTimeout.elapsed()>1000) return -1; // ERROR === read GRSEB header TIMEOUT
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}
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gresbReceptionSocket->read(&RES_TR_EP, 1);
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gresbReceptionSocket->read( (char*) &packetLength2, 1);
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gresbReceptionSocket->read( (char*) &packetLength1, 1);
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gresbReceptionSocket->read( (char*) &packetLength0, 1);
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packetLength = (packetLength2<<16) + (packetLength1<<8) + (packetLength0);
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spwPacket = (char*) malloc(packetLength);
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// READ THE SPW PACKET
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while(gresbReceptionSocket->bytesAvailable() < packetLength)
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{
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gresbReceptionSocket->waitForReadyRead(100);
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if(spwPacketReceiverTimeout.elapsed()>1000) return -2; // ERROR === read SPW packet TIMEOUT
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}
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gresbReceptionSocket->read( spwPacket, packetLength );
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gresbReceptionSocket->blockSignals(0);
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switch(spwPacket[1]) // byte 1 is the protocole identifier in the SPW packet
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{
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case 1: // 0x01 is the protocole identifier for RMAP packets
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if (rmapPacketSEMAPHORE->available()!=0) return -3; // ERROR === previous RMAP packet not processed yet
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for(unsigned int i=0; i<packetLength; i++) rmapPacket[i] = spwPacket[i];
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rmapPacketSize = packetLength;
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rmapPacketSEMAPHORE->release();
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//emit sendMessage("RMAP packet of size " + QString::number(packetLength) + " received");
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return packetLength;
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case 2: // 0x02 is the protocole identifier for CCSDS packets
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if (ccsdsPacketSEMAPHORE->available()!=0) return -4; // ERROR === previous CCSDS packet not processed yet
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for(unsigned int i=0; i<packetLength; i++) ccsdsPacket[i] = spwPacket[i];
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ccsdsPacketSize = packetLength;
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ccsdsPacketSEMAPHORE->release();
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emit(ccsdsPacketAvailable(ccsdsPacket, packetLength));
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return packetLength;
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}
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return 0;
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}
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void spwpacketreceiver::processCCSDSPacket(unsigned char *ccsdsPacket, unsigned int size) // SLOT
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{
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QString message;
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unsigned int fine_time_value = 0;
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fine_time_value = ((unsigned int) ccsdsPacket[7]<<24)
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+ ((unsigned int) ccsdsPacket[6]<<16)
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+ ((unsigned int) ccsdsPacket[5]<<8)
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+ ((unsigned int) ccsdsPacket[4]);
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message.append(QTime::currentTime().toString() +":" + QString::number(QTime::currentTime().msec()) + ": ");
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message.append("size "
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+ QString::number(size)
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+" *** header "
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+ QString::number(ccsdsPacket[0], 16)
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+ " "
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+ QString::number(ccsdsPacket[1], 16)
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+ " "
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+ QString::number(ccsdsPacket[2], 16)
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+ " "
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+ QString::number(ccsdsPacket[3], 16)
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+ " *** coarse time "
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+ QString::number(fine_time_value));
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//+ QString::number(ccsdsPacket[4], 16)
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//+" "
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//+ QString::number(ccsdsPacket[5], 16)
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//+" "
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//+ QString::number(ccsdsPacket[6], 16)
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//+" "
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//+ QString::number(ccsdsPacket[7], 16));
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ccsdsPacketSEMAPHORE->acquire();
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emit sendMessage(message);
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}
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