public MessageFields Copy()
{
MessageFields result = new MessageFields();
result.messageId = this.messageId;
result.commandId = this.commandId;
result.argument0 = this.argument0;
result.argument1 = this.argument1;
return(result);
}
public static MessageFields ParsePacket(byte value)
{
MessageFields output = null;
switch (parserState)
{
case 0: //look for the first magic byte '#'
if (value == '#')
{
parserState = 1;
}
break;
case 1: //look for the second magic byte '#'
if (value == '#')
{
parserState = 2;
}
else
{
parserState = 0;
}
break;
case 2: //save the message id
parserMessageFields.messageId = (MessageId)value;;
parserState = 3;
break;
case 3: //save the command id
parserMessageFields.commandId = (CommandId)value;;
parserState = 4;
break;
case 4: //save arg0
parserMessageFields.argument0 = value;
parserState = 5;
break;
case 5: //save arg1
parserMessageFields.argument1 = value;;
parserState = 6;
break;
case 6: //Check the checksum
if (CalculateCheckSum(parserMessageFields) == value)
{
output = parserMessageFields.Copy();
}
parserState = 0;
break;
}
return(output);
}
public static byte CalculateCheckSum(MessageFields messageFields)
{
byte iChkSum = 0;
iChkSum += (byte)messageFields.messageId;
iChkSum += (byte)messageFields.commandId;
iChkSum += (byte)messageFields.argument0;
iChkSum += (byte)messageFields.argument1;
return(iChkSum);
}