OMNET++ ZIGBEE MODULE

Sample code for Omnet++ Zigbee Module:
Void ZigBeeBANMac::attemptTX() {

if (macState != MAC_RAP && macState != MAC_FREE_TX_ACCESS) return;

if (waitingForACK || attemptingToTX || futureAttemptToTX ) return;

if (packetToBeSent && currentPacketTransmissions + currentPacketCSFails < maxPacketTries) {
if (macState == MAC_RAP) attemptTxInRAP();
if ((macState == MAC_FREE_TX_ACCESS) && (canFitTx())) sendPacket();
return;
}

if (packetToBeSent) {
trace() << “Max TX attempts reached. Last attempt was a CS fail”; if (currentPacketCSFails == maxPacketTries){ if (packetToBeSent->getFrameType() == DATA)
collectOutput(“Data pkt breakdown”, “Failed, Channel busy”);
else collectOutput(“Mgmt & Ctrl pkt breakdown”, “Failed, Channel busy”);
} else {
if (packetToBeSent->getFrameType() == DATA)
collectOutput(“Data pkt breakdown”, “Failed, No Ack”);
else collectOutput(“Mgmt & Ctrl pkt breakdown”, “Failed, No Ack”);
}
cancelAndDelete(packetToBeSent);
packetToBeSent = NULL;
currentPacketTransmissions = 0;
currentPacketCSFails = 0;
}
if (MgmtBuffer.size() !=0) {
packetToBeSent = (BaselineMacPacket*)MgmtBuffer.front(); MgmtBuffer.pop();
if (MgmtBuffer.size() > MGMT_BUFFER_SIZE)
trace() << “WARNING: Management buffer reached a size of ” << MgmtBuffer.size();
} else if (TXBuffer.size() != 0){
packetToBeSent = (BaselineMacPacket*)TXBuffer.front(); TXBuffer.pop();
setHeaderFields(packetToBeSent, I_ACK_POLICY, DATA, RESERVED);
}
// if we found a packet in any of the buffers, try to TX it.
if (packetToBeSent){
if (macState == MAC_RAP) attemptTxInRAP();
if ((macState == MAC_FREE_TX_ACCESS) && (canFitTx())) sendPacket();
}
}