internal override IEnumerable <byte> OnSerialize(IModbusMessage message)
{
if (message is ModbusRequest request)
{
request.TransactionID = transactionID++;
}
var messageArray = message.Serialize().ToArray();
int messageLength = messageArray.Length;
yield return((byte)((message.TransactionID >> 8) & 0xff));
yield return((byte)(message.TransactionID & 0xff));
yield return(0);
yield return(0);
yield return((byte)((messageLength >> 8) & 0xff));
yield return((byte)(messageLength & 0xff));
foreach (var b in messageArray)
{
yield return(b);
}
}
internal override IEnumerable <byte> OnSerialize(IModbusMessage message)
{
ushort crc = ushort.MaxValue;
foreach (var b in message.Serialize())
{
byte tableIndex = (byte)(crc ^ b);
crc >>= 8;
crc ^= crcTable[tableIndex];
yield return(b);
}
foreach (var b in BitConverter.GetBytes(crc))
{
yield return(b);
}
}
internal override IEnumerable <byte> OnSerialize(IModbusMessage message)
{
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append(":");
byte lrc = 0;
foreach (var b in message.Serialize())
{
stringBuilder.AppendFormat("{0:X2}", b);
lrc += b;
}
lrc = (byte)(-lrc & 0xff);
stringBuilder.AppendFormat("{0:X2}", lrc);
stringBuilder.Append("\r\n");
return(Encoding.ASCII.GetBytes(stringBuilder.ToString()));
}
