/// <summary>
/// Initializes EtherCAT and returns found slaves.
/// </summary>
/// <param name="interfaceName">The name of the network adapter.</param>
/// <returns>Returns found slave.</returns>
public static SlaveInfo ScanDevices(IntPtr context, string interfaceName, SlaveInfo referenceSlave = null)
{
ec_slave_info_t[] refSlaveIdentifications = null;
if (referenceSlave != null)
{
refSlaveIdentifications = EcUtilities.ToSlaveIdentifications(referenceSlave);
}
else
{
refSlaveIdentifications = new ec_slave_info_t[] { }
};
// scan devices
var networkInterface = NetworkInterface
.GetAllNetworkInterfaces()
.Where(nic => nic.Name == interfaceName)
.FirstOrDefault();
if (networkInterface == null)
{
throw new Exception($"{ ErrorMessage.SoemWrapper_NetworkInterfaceNotFound } Interface name: '{ interfaceName }'.");
}
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
interfaceName = $@"rpcap://\Device\NPF_{networkInterface.Id}";
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) ||
RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
interfaceName = $"{interfaceName}";
}
else
{
throw new PlatformNotSupportedException();
}
EcUtilities.CheckErrorCode(context, EcHL.ScanDevices(context, interfaceName, out var slaveIdentifications, out var slaveCount));
// create slaveInfo from received data
var offset = 0;
var newSlaveIdentifications = new ec_slave_info_t[slaveCount + 1]; // correct because EC master = slaveIdentifications[0]
for (int i = 0; i <= newSlaveIdentifications.Count() - 1; i++)
{
newSlaveIdentifications[i] = Marshal.PtrToStructure <ec_slave_info_t>(IntPtr.Add(slaveIdentifications, offset));
offset += Marshal.SizeOf(typeof(ec_slave_info_t));
}
// validate CSA
while (EcUtilities.EnsureValidCsa(context, newSlaveIdentifications, refSlaveIdentifications))
{
//
}
return(EcUtilities.ToSlaveInfo(newSlaveIdentifications));
}
