public byte[] ToBytes()
{
var cemiBytes = new byte[apdu.Length + 10];
cemiBytes[0] = message_code;
cemiBytes[1] = aditional_info_length;
cemiBytes[2] = control_field_1;
cemiBytes[3] = control_field_2;
cemiBytes[4] = 0x00;
cemiBytes[5] = 0x00;
var dst_address = KnxHelper.GetAddress(destination_address);
cemiBytes[6] = dst_address[0];
cemiBytes[7] = dst_address[1];
cemiBytes[8] = (byte)apdu.Length;
cemiBytes[9] = 0x00;
if (!_isstatus)
{
cemiBytes[10] = 0x80;
}
cemiBytes[10] |= (byte)(apdu[0] & 0x3f);
for (var i = 1; i < apdu.Length; i++)
{
cemiBytes[10 + i] = apdu[i];
}
return(cemiBytes);
}
public static KnxCEMI FromBytes(bool threeLevelGroupAssigning, byte[] cemiBytes)
{
var cemi = new KnxCEMI();
cemi.message_code = cemiBytes[0];
cemi.aditional_info_length = cemiBytes[1];
if (cemi.aditional_info_length > 0)
{
cemi.aditional_info = new byte[cemi.aditional_info_length];
Array.Copy(cemiBytes, 2, cemi.aditional_info, 0, cemi.aditional_info_length);
}
cemi.control_field_1 = cemiBytes[2 + cemi.aditional_info_length];
cemi.control_field_2 = cemiBytes[3 + cemi.aditional_info_length];
cemi.source_address = KnxHelper.GetIndividualAddress(new[] { cemiBytes[4 + cemi.aditional_info_length], cemiBytes[5 + cemi.aditional_info_length] });
cemi.destination_address =
KnxHelper.GetKnxDestinationAddressType(cemi.control_field_2).Equals(KnxHelper.KnxDestinationAddressType.INDIVIDUAL)
? KnxHelper.GetIndividualAddress(new[] { cemiBytes[6 + cemi.aditional_info_length], cemiBytes[7 + cemi.aditional_info_length] })
: KnxHelper.GetGroupAddress(new[] { cemiBytes[6 + cemi.aditional_info_length], cemiBytes[7 + cemi.aditional_info_length] }, threeLevelGroupAssigning);
var data_length = Math.Min(cemiBytes[8 + cemi.aditional_info_length], cemiBytes.Length - 10); // AR
if (data_length > 0)
{
cemi.apdu = new byte[data_length];
Array.Copy(cemiBytes, 10 + cemi.aditional_info_length, cemi.apdu, 0, data_length);
}
return(cemi);
}
public static KnxCEMI CreateStatusCEMI(byte messageCode, string destinationAddress)
{
KnxCEMI cemi = new KnxCEMI()
{
message_code = messageCode != 0x00 ? messageCode : (byte)0x11,
aditional_info_length = 0,
control_field_1 = 0xAC,
control_field_2 = KnxHelper.IsAddressIndividual(destinationAddress) ? (byte)0x50 : (byte)0xF0,
destination_address = destinationAddress,
apdu = new byte[] { 0x00 },
_isstatus = true
};
return(cemi);
}
public static KnxCEMI CreateActionCEMI(byte messageCode, string destinationAddress, byte[] asdu)
{
KnxCEMI cemi = new KnxCEMI()
{
message_code = messageCode != 0x00 ? messageCode : (byte)0x11,
aditional_info_length = 0,
control_field_1 = 0xAC,
control_field_2 = KnxHelper.IsAddressIndividual(destinationAddress) ? (byte)0x50 : (byte)0xF0,
destination_address = destinationAddress,
apdu = new byte[asdu.Length]
};
cemi.apdu[0] = (byte)(0x80 | (asdu[0] & 0x3f));
for (var i = 1; i < asdu.Length; i++)
{
cemi.apdu[i] = asdu[i];
}
return(cemi);
}