public override SecsMessageBase ToSecsMessage(byte[] data)
{
using (MemoryStream reader = new MemoryStream(data))
{
reader.Position = 0;
byte[] lengthBytes = new byte[4];
//get length byte
reader.Read(lengthBytes, 0, lengthBytes.Length);
Array.Reverse(lengthBytes);
int dataLength = BitConverter.ToInt32(lengthBytes, 0);
if (data.Length != dataLength + 4)
{
//invalid data length
throw new Exception("Invalid data lenght");
}
//get header
byte[] header = new byte[10];
reader.Read(header, 0, header.Length);
//get device id from header
byte[] deviceIdBytes = new byte[2];
Array.Copy(header, 0, deviceIdBytes, 0, 2);
Array.Reverse(deviceIdBytes);
ushort deviceId = BitConverter.ToUInt16(deviceIdBytes, 0);
//get stream
byte stream = (byte)(header[2] & 0x7F);
byte function = header[3];
bool needReply = ((header[2] & 0x80) == 0x80);
//transactionId.
byte[] transactionIdBytes = new byte[4];
Array.Copy(header, 6, transactionIdBytes, 0, transactionIdBytes.Length);
Array.Reverse(transactionIdBytes);
uint transactionId = BitConverter.ToUInt32(transactionIdBytes, 0);
SecsMessageBase msg = GetSecsMessageInstance(stream, function, needReply);
msg.ReadItems(reader); //Sec2 data read
msg.NeedReply = needReply;
msg.TransactionId = transactionId;
msg.DeviceId = deviceId;
return(msg);
}
}
public override SecsMessageBase ToSecsMessage(byte[] data)
{
byte[] header = new byte[10];
Array.Copy(data, 0, header, 0, header.Length);
//header
//[0][1][2][3][4][5][6][7][8][9] ...
//[0][1]
byte[] tmp2bytes = new byte[2];
Array.Copy(header, 0, tmp2bytes, 0, tmp2bytes.Length);
Array.Reverse(tmp2bytes);
ushort deviceId = BitConverter.ToUInt16(tmp2bytes, 0);
// [2]
byte stream = (byte)(header[2] & 0x7F); //0111 1111
bool needReply = (0x80 == (byte)(header[2] & 0x80));
// [3]
byte function = header[3];
bool isPrimary = (function % 2 == 1);
// [4][5]
Array.Copy(header, 4, tmp2bytes, 0, tmp2bytes.Length);
bool isLastBlock = (0x80 == (tmp2bytes[0] & 0x80));
Array.Reverse(tmp2bytes); //reverse for convert by BitConvertor
tmp2bytes[0] = (byte)(tmp2bytes[0] & 0x7F);
ushort blockNo = BitConverter.ToUInt16(tmp2bytes, 0);
// [6][7][8][9]
byte[] temp4Bytes = new byte[4];
Array.Copy(header, 6, temp4Bytes, 0, temp4Bytes.Length);
Array.Reverse(temp4Bytes);
uint transId = BitConverter.ToUInt32(temp4Bytes, 0);
SecsMessageBase msg = GetSecsMessageInstance(stream, function, needReply);
if (data != null && data.Length > 10)
{
using (MemoryStream reader = new MemoryStream(data))
{
reader.Position = header.Length;
msg.ReadItems(reader);
}
}
msg.TransactionId = transId;
msg.DeviceId = deviceId;
return(msg);
}