public DCPRetCodes AnswerToDCPMessage(DataBuffer a_data, MessageTypes a_msgType, CommandSet a_cmdSet, DCPFrame a_txMsg, DCPFrame a_rxMsg)
{
DataBuffer buffer = new DataBuffer(a_data.NumItems + 4);
byte num = (byte) a_msgType;
buffer = a_data;
switch (num)
{
case 0x40:
case 0x80:
a_txMsg.CmdSet = (byte) a_cmdSet;
a_txMsg.SeqNum = a_rxMsg.SeqNum;
break;
}
int num2 = 0;
while (num2 < _DCPMsgRepeatNr)
{
DCPRetCodes codes;
if (_dcpVersion == DCPVersion.DCP)
{
codes = a_txMsg.ConstructDCPmsg(buffer, a_cmdSet, a_msgType);
}
else
{
codes = a_txMsg.ConstructDCP2msg(buffer, a_cmdSet, a_msgType);
}
codes = doExchangeDCP_TX(a_txMsg, a_rxMsg);
switch (codes)
{
case DCPRetCodes.DCP_RESP_SENT:
return codes;
case DCPRetCodes.DCP_FATAL:
return codes;
}
return DCPRetCodes.DCP_FATAL;
}
return DCPRetCodes.DCP_FATAL;
}
public DCPRetCodes exchangeDCPMessage(DataBuffer a_data, MessageTypes a_msgType, CommandSet a_cmdSet, DCPFrame a_txMsg, DCPFrame a_rxMsg)
{
MessageTypes synchReqOrIndication;
DataBuffer buffer = new DataBuffer(a_data.NumItems + 4);
MessageTypes types = synchReqOrIndication = a_msgType;
buffer = a_data;
TaskState writingCommand = TaskState.WritingCommand;
switch (synchReqOrIndication)
{
case MessageTypes.ACK:
case MessageTypes.Nack:
return DCPRetCodes.DCP_FATAL;
}
for (int i = 0; i < _DCPMsgRepeatNr; i++)
{
DCPRetCodes codes;
switch (_dcpVersion)
{
case DCPVersion.DCP2:
codes = a_txMsg.ConstructDCP2msg(buffer, a_cmdSet, synchReqOrIndication);
break;
default:
codes = a_txMsg.ConstructDCPmsg(buffer, a_cmdSet, synchReqOrIndication);
break;
}
codes = doExchangeDCP_TX(a_txMsg, a_rxMsg);
switch (codes)
{
case DCPRetCodes.DCP_RESP_SENT:
return codes;
case DCPRetCodes.DCP_FATAL:
return codes;
case DCPRetCodes.DCP_ERR_TIMEOUT:
case DCPRetCodes.DCP_ERR_EDC:
break;
default:
if (codes != DCPRetCodes.DCP_OK)
return DCPRetCodes.DCP_FATAL;
if (a_rxMsg.SeqNum == a_txMsg.SeqNum)
{
if ((a_rxMsg.MsgType != 0) && (a_rxMsg.MsgType != 0xc0))
{
if (a_rxMsg.MsgType != 0x80)
{
if (a_rxMsg.MsgType != 0x40)
return DCPRetCodes.DCP_FATAL;
if (writingCommand != TaskState.SynchReq)
{
if (a_rxMsg.Len > 2)
return DCPRetCodes.DCP_OK_ACK;
return DCPRetCodes.DCP_OK;
}
synchReqOrIndication = types;
buffer = a_data;
writingCommand = TaskState.WritingCommand;
}
else
{
if (a_rxMsg.CmdSet != 0)
return DCPRetCodes.DCP_OK_NACK;
if (a_rxMsg.Data[0] != 0)
return DCPRetCodes.DCP_OK_NACK;
}
}
}
else
{
writingCommand = TaskState.SynchReq;
synchReqOrIndication = MessageTypes.SynchReqOrIndication;
buffer.NumItems = 0;
}
break;
}
}
return DCPRetCodes.DCP_FATAL;
}