/// <summary>
/// Create a single packet MDC1200 data array.
/// </summary>
/// <param name="packet">MDC packet to create</param>
public void CreateSingle(MDCPacket packet)
{
Messages.Trace("Creating single-length MDC1200 packet " + packet.ToString());
// initialize MDC1200 header
GenerateHeader(ref dataArray, ref dataLoaded, NumberOfPreambles, true);
// create a temporary array DATA_SIZE - 12 (stripping the size used by
// the header)
byte[] dp = new byte[CODEWORD_LENGTH];
// fill the first bytes with the proper opcode and argument data
dp[0] = packet.Operation;
dp[1] = packet.Argument;
dp[2] = (byte)((packet.UnitID >> 8) & 0x00FF);
dp[3] = (byte)(packet.UnitID & 0x00FF);
// pack data
PackData(dp);
// block copy new data into MDC1200 data array
Buffer.BlockCopy(dp, 0, this.dataArray, dataLoaded, dp.Length);
this.dataLoaded += 14;
// dump output data for debug purposes
Messages.TraceHex("Raw Data Dump", dataArray);
}
/// <summary>
/// Internal function to reset any internal data fields before doing any operations.
/// </summary>
private void Clear()
{
this.frameCount = 0;
// clear old packet data
first = new MDCPacket();
second = new MDCPacket();
// wipe all arrays
this.th = new double[MDC_ND];
this.shstate = new int[MDC_ND];
this.shcount = new int[MDC_ND];
this.nlstep = new int[MDC_ND];
this.nlevel = new double[MDC_ND, 14];
this.bits = new int[MDC_ND, MAX_MDC1200_BITS];
this.xorBit = new bool[MDC_ND];
this.invertBit = new bool[MDC_ND];
this.syncLow = new uint[MDC_ND];
this.syncHigh = new uint[MDC_ND];
// iterate through decoders setting up fields
for (int i = 0; i < MDC_ND; i++)
{
this.th[i] = 0.0 + (i * (TWOPI / MDC_ND));
this.xorBit[i] = false;
this.invertBit[i] = false;
this.shstate[i] = 0;
this.shcount[i] = 0;
this.nlstep[i] = i;
// ensure all bit arrays are cleared to zero
ClearBits(i);
}
}
/// <summary>
/// Translates a MDC1200 operation to a string
/// </summary>
/// <param name="packet">MDC Packet to decode</param>
/// <returns>String containing parsed MDC1200 operation</returns>
public string ToString(MDCPacket packet)
{
string ret = string.Empty;
string unit = packet.UnitID.ToString("X4");
// check operation
switch (packet.Operation)
{
/**
* Single Packet Operations
*/
case OpType.PTT_ID:
{
// check argument
switch (packet.Argument)
{
case ArgType.NO_ARG:
ret += "PTT ID: " + unit + " [Post- ID]";
break;
case ArgType.PTT_PRE:
ret += "PTT ID: " + unit + " [ Pre- ID]";
break;
default:
ret += "PTT ID: " + unit + " [Unkw- ID]";
break;
}
}
break;
case OpType.EMERGENCY:
ret += "!!! EMERGENCY " + unit;
break;
case OpType.EMERGENCY_ACK:
ret += "!!! EMERGENCY Acknowledge: " + unit;
break;
case OpType.RADIO_CHECK:
ret += "Radio Check Unit: " + unit;
break;
case OpType.RADIO_CHECK_ACK:
ret += "Radio Check Acknowledge: " + unit;
break;
case OpType.REMOTE_MONITOR:
ret += "Remote Monitor Unit: " + unit;
break;
case OpType.RAC:
ret += "Repeater Access Repeater ID: " + unit;
break;
case OpType.RTT_1:
case OpType.RTT_2:
ret += "RTT From: " + unit;
break;
case OpType.RTT_ACK: // also OpType.MESSAGE_ACK
ret += "RTT/Message Acknowledge: " + unit;
break;
case OpType.STATUS_REQUEST:
ret += "Status Request To: " + unit;
break;
case OpType.STATUS_RESPONSE:
ret += "Status Response From: " + unit + " Status: " + packet.Argument.ToString("X2");
break;
case OpType.MESSAGE:
ret += "Message Request To: " + unit + " Message: " + packet.Argument.ToString("X2");
break;
case OpType.RADIO_INHIBIT:
{
// check argument
switch (packet.Argument)
{
case ArgType.NO_ARG:
ret += "Stun/Inhibit Target: " + unit;
break;
case ArgType.CANCEL_INHIBIT:
ret += "Revive/Uninhibit Target: " + unit;
break;
default:
ret += "UNK Inhibit Target: " + unit;
break;
}
}
break;
case OpType.RADIO_INHIBIT_ACK:
{
// check argument
switch (packet.Argument)
{
case ArgType.NO_ARG:
ret += "Stun/Inhibit: Acknowlege: " + unit;
break;
case ArgType.CANCEL_INHIBIT:
ret += "Revive/Uninhibit Acknowledge: " + unit;
break;
default:
ret += "UNK Inhibit Acknowledge: " + unit;
break;
}
}
break;
/**
* Double Packet Operations
*/
case OpType.DOUBLE_PACKET_TYPE1:
case OpType.DOUBLE_PACKET_TYPE2:
ret += "Request To: " + unit;
break;
case OpType.CALL_ALERT_ACK_EXPECTED:
case OpType.CALL_ALERT_NOACK_EXPECTED:
ret += "Call Alert/Page From: " + unit;
break;
case OpType.CALL_ALERT_ACK:
ret += "Call Alert/Page Acknowledge: " + unit;
break;
case OpType.SELECTIVE_CALL_1:
case OpType.SELECTIVE_CALL_2:
ret += "Sel-Call: From: " + unit;
break;
default:
ret += "UNK Op " + packet.Operation.ToString("X2") + " Arg " + packet.Argument.ToString("X2") + " Unit ID " + unit;
break;
}
return(ret);
}
