//**********************************
//* Extract a header from a packet
//**********************************
public List <byte> Extract(byte[] packet, int length)
{
List <byte> m_EncapsulatedData = new List <byte>();
string txtValue = string.Empty;
string Value3 = string.Empty;
byte[] Data = null;
// Read Response
if (packet[20] == 0x55)
{
switch (packet[22])
{
case 0: // Bit X
for (int i = 32; i < packet.Length; i++)
{
m_EncapsulatedData.Add(packet[i]);
}
break;
case 1: //Byte B
txtValue = XGTFENETMessage.GetValStr(packet, 20 + 12, 1);
Data = (Conversion.HexToBytes(txtValue));
break;
case 2: //Word
txtValue = XGTFENETMessage.GetValStr(packet, 20 + 12, 2);
Data = (Conversion.HexToBytes(txtValue));
break;
case 3: //DWord
txtValue = XGTFENETMessage.GetValStr(packet, 20 + 12, 4);
Data = (Conversion.HexToBytes(txtValue));
break;
case 4: //LWord
txtValue = XGTFENETMessage.GetValStr(packet, 20 + 12, 8);
Data = (Conversion.HexToBytes(txtValue));
break;
case 20:
Data = XGTFENETMessage.ToStringArray(packet, packet.Length);
break;
}
for (int i = 0; i < Data.Length; i++)
{
m_EncapsulatedData.Add(Data[i]);
}
}
return(m_EncapsulatedData);
}
public unsafe ItemData <float> ReadFloat(DeviceAddress address)
{
byte[] data = WriteSyncData(XGTFENETMessage.ReadHoldingRegistersMessage((byte)address.Area, Convert.ToString(address.Start), (ushort)address.DBNumber));
if (Extract(data, data.Length).ToArray() == null)
{
return(new ItemData <float>(0.0f, 0, QUALITIES.QUALITY_BAD));
}
else
{
return(new ItemData <float>(IPAddress.HostToNetworkOrder(BitConverter.ToInt32(Extract(data, data.Length).ToArray(), 0)), 0, QUALITIES.QUALITY_GOOD));
}
}
public ItemData <string> ReadString(DeviceAddress address, ushort size)
{
byte[] data = WriteSyncData(XGTFENETMessage.ReadHoldingRegistersMessage((byte)address.Area, Convert.ToString(address.Start), (ushort)address.DBNumber));
if (Extract(data, data.Length).ToArray() == null)
{
return(new ItemData <string>(string.Empty, 0, QUALITIES.QUALITY_BAD));
}
else
{
return(new ItemData <string>(Encoding.ASCII.GetString(Extract(data, data.Length).ToArray(), 0, data.Length), 0, QUALITIES.QUALITY_GOOD));//是否考虑字节序问题？
}
}
public ItemData <byte> ReadByte(DeviceAddress address)
{
byte[] data = WriteSyncData(XGTFENETMessage.ReadHoldingRegistersMessage((byte)address.Area, Convert.ToString(address.Start), (ushort)address.DBNumber));
if (Extract(data, data.Length).ToArray() == null)
{
return(new ItemData <byte>(0, 0, QUALITIES.QUALITY_BAD));
}
else
{
return(new ItemData <byte>(Extract(data, data.Length).ToArray()[0], 0, QUALITIES.QUALITY_GOOD));
}
}
public ItemData <bool> ReadBit(DeviceAddress address)
{
byte[] data = address.DBNumber > 2 ? WriteSyncData(XGTFENETMessage.ReadCoilStatusMessage((byte)address.Area, Convert.ToString(address.Start), (ushort)address.DBNumber)) :
WriteSyncData(XGTFENETMessage.ReadCoilStatusMessage((byte)address.Area, Convert.ToString(address.Start * 16 + address.Bit), (ushort)address.DBNumber));
if (Extract(data, data.Length).ToArray() == null)
{
return(new ItemData <bool>(false, 0, QUALITIES.QUALITY_BAD));
}
if (data.Length == 1)
{
return(new ItemData <bool>(Extract(data, data.Length).ToArray()[0] > 0, 0, QUALITIES.QUALITY_GOOD));
}
unsafe
{
fixed(byte *p = data)
{
short *p1 = (short *)p;
return(new ItemData <bool>((*p1 & (1 << address.Bit.BitSwap()))
!= 0, 0, QUALITIES.QUALITY_GOOD));
}
}
}
public byte[] WriteSingleRegister(int id, int startAddress, byte[] values)
{
byte[] frame = XGTFENETMessage.WriteSingleRegisterMessage(Convert.ToByte(id), Convert.ToString(startAddress), values);
return(WriteSyncData(frame));
}
public byte[] WriteSingleCoils(int id, int startAddress, bool OnOff)
{
byte[] frame = XGTFENETMessage.WriteSingleCoilMessage(Convert.ToByte(id), Convert.ToString(startAddress), OnOff);
return(WriteSyncData(frame));
}
