public static string[] GetComPortList()
{
List <string> comPorts = new List <string>();
try
{
List <FTDeviceInfo> ftdiDevices = new List <FTDeviceInfo>();
uint deviceNumber;
FTStatusCode ftStatus = Ftdi.FT_CreateDeviceInfoList(out deviceNumber);
if (deviceNumber > 0)
{
FTDeviceInfoNode[] devices = new FTDeviceInfoNode[deviceNumber];
for (int k = 0; k < deviceNumber; k++)
{
devices[k].SerialNumber = new byte[16];
devices[k].Description = new byte[64];
}
ftStatus = Ftdi.FT_GetDeviceInfoList(devices, ref deviceNumber);
for (int k = 0; k < deviceNumber; k++)
{
FTDeviceInfo ftDeviceInfo = new FTDeviceInfo();
ftDeviceInfo.Flags = devices[k].Flags;
ftDeviceInfo.Type = devices[k].Type;
ftDeviceInfo.ID = devices[k].ID;
ftDeviceInfo.LocId = devices[k].LocId;
ftDeviceInfo.Description = ASCIIEncoding.ASCII.GetString(devices[k].Description);
ftDeviceInfo.Description = ftDeviceInfo.Description.Substring(0, ftDeviceInfo.Description.IndexOf("\0"));
ftDeviceInfo.SerialNumber = ASCIIEncoding.ASCII.GetString(devices[k].SerialNumber);
ftDeviceInfo.SerialNumber = ftDeviceInfo.SerialNumber.Substring(0, ftDeviceInfo.SerialNumber.IndexOf("\0"));
ftdiDevices.Add(ftDeviceInfo);
}
foreach (FTDeviceInfo ftdiDevice in ftdiDevices)
{
string comPort = Ftdi.GetComPortNumber(ftdiDevice.SerialNumber);
if (string.IsNullOrEmpty(comPort) == false)
{
comPorts.Add(comPort);
}
}
}
}
catch (DllNotFoundException)
{
}
comPorts.Sort();
return(comPorts.ToArray());
}
private static string GetComPortNumber(string serialNumber)
{
IntPtr ftHandle = IntPtr.Zero;
FTStatusCode ftStatus = Ftdi.FT_OpenEx(serialNumber, (uint)FTOpenByFlag.FT_OPEN_BY_SERIAL_NUMBER, ref ftHandle);
string comNumber = null;
ftStatus = FTStatusCode.FT_OTHER_ERROR;
if (ftHandle != IntPtr.Zero)
{
int portNumber;
ftStatus = Ftdi.FT_GetComPortNumber(ftHandle, out portNumber);
if (ftStatus == FTStatusCode.FT_OK && portNumber > 0)
{
comNumber = "COM" + portNumber.ToString();
}
ftStatus = Ftdi.FT_Close(ftHandle);
}
return(comNumber);
}
