/// <summary>
/// HACK: Microsoft CDC driver (usbser.sys) does not register properly as a serial port
/// It needs serenum.sys upper port filter which causes problems of its own...
///
/// </summary>
/// <param name="ports"></param>
private static void PatchInZModemSerials(List <SerialPortInfo> ports)
{
/* SiLabs licensed USB to serial driver PID/VID */
const string SILABS_VID_PID = @"USB\VID_10C4&PID_81E8";
/* Zephyr VID (not specific on PID) */
const string ZEPHYR_VID = @"USB\VID_22F3";
string pnpDevId;
int startIndex;
int length;
System.Management.ManagementScope scope;
System.Management.ObjectQuery query;
System.Management.ManagementObjectSearcher searcher;
System.Management.ManagementObjectCollection returnCollection;
System.Management.EnumerationOptions opt = new System.Management.EnumerationOptions();
try
{
/* get the data NOW, don't put off the query until it is required (30sec timeout) */
opt.ReturnImmediately = false;
opt.Timeout = new TimeSpan(0, 0, 30);
/* define scope, in this case, this machine */
scope = new System.Management.ManagementScope(@"root\CIMV2");
/* set the query, get all information on the serial ports on the system */
query = new System.Management.ObjectQuery("SELECT * from Win32_SerialPort");
/* stick two together into a search */
searcher = new System.Management.ManagementObjectSearcher(scope, query, opt);
/* Run the query */
returnCollection = searcher.Get();
foreach (var oReturn in returnCollection)
{
pnpDevId = oReturn["PNPDeviceID"] as string;
pnpDevId = pnpDevId.ToUpper(); // Vista / Win7 seem to use upper case PID/VID/GUID
/* Checks to see if the candidate mySerialPort is a zephyr Serial Port */
if ((pnpDevId.LastIndexOf(SILABS_VID_PID) > -1) || (pnpDevId.LastIndexOf(ZEPHYR_VID) > -1))
{
/* Extract the serial number from the PnP mySerialPort ID */
startIndex = pnpDevId.LastIndexOf(@"\") + 1;
length = pnpDevId.LastIndexOf(@"_") - startIndex;
if (length < 0)
{
length = pnpDevId.Length - startIndex;
}
/* If port not already known, add to list */
string serial = pnpDevId.Substring(startIndex, length);
string portName = oReturn["DeviceID"] as string;
string caption = oReturn["Caption"] as string;
var search = ports.FirstOrDefault(item => item.Name == portName);
if (search == null)
{
System.Diagnostics.Debug.WriteLine("Found: " + oReturn["DeviceID"] + " " + oReturn["Caption"]);
SerialPortInfo spi = new SerialPortInfo();
spi.SerialName = serial;
spi.Name = portName;
spi.FriendlyName = caption;
spi.Description = caption;
spi.Manufacturer = "Zephyr";
spi.Driver = "usbser.sys";
ports.Add(spi);
}
}
}
}
catch
{
}
}
/// <summary>
/// Return the list of all available COM port into the system
/// </summary>
/// <returns></returns>
public static ReadOnlyCollection <SerialPortInfo> GetAvailablePorts()
{
IntPtr hdevInfo = SetupDi.SetupDiGetClassDevs(
ref GUID_DEVINTERFACE_COMPORT,
null,
IntPtr.Zero,
SetupDIGetClassDevsFlags.DIGCF_PRESENT | SetupDIGetClassDevsFlags.DIGCF_DEVICEINTERFACE);
if (hdevInfo == INVALID_HANDLE_VALUE)
{
throw new Exception("can't access to serial port communication information.");
}
List <SerialPortInfo> ports = new List <SerialPortInfo>();
uint index = 0;
SP_DEVINFO_DATA deviceInfoData = new SP_DEVINFO_DATA();
while (SetupDi.SetupDiEnumDeviceInfo(hdevInfo, index++, deviceInfoData) == true)
{
IntPtr hKey = SetupDi.SetupDiOpenDevRegKey(
hdevInfo,
deviceInfoData,
SetupDiOpenDevRegKeyScopeFlags.DICS_FLAG_GLOBAL,
0,
SetupDiOpenDevRegKeyKeyTypeFlags.DIREG_DEV,
REGSAM.KEY_QUERY_VALUE);
if (hKey != IntPtr.Zero)
{
SerialPortInfo portInfo = new SerialPortInfo();
UInt32 resultLength = 1024;
IntPtr registryName = Marshal.AllocHGlobal(1024);
var retValue = Registry.NtQueryKey(hKey, 3, registryName, 1024, ref resultLength);
if (retValue == 0)
{
string registryNameStr = Marshal.PtrToStringAuto((IntPtr)(registryName.ToInt32() + 4), Marshal.ReadInt32(registryName) / 2);
Marshal.FreeHGlobal(registryName);
var registryPath = registryNameStr.Split('\\');
if (registryPath != null && registryPath.Length > 3)
{
var sNumber = registryPath[registryPath.Length - 2];
if (sNumber != null && sNumber.Contains('_'))
{
portInfo.SerialName = sNumber.Remove(sNumber.IndexOf('_'));
}
else
{
portInfo.SerialName = sNumber;
}
var deviceVidPid = registryPath[registryPath.Length - 3].ToUpperInvariant();
if (deviceVidPid != null && deviceVidPid.Length > 0 && deviceVidPid.Contains("pid_") && deviceVidPid.Contains("vid_"))
{
try
{
char separator = '&';
if (deviceVidPid.Contains('&'))
{
separator = '&';
}
else if (deviceVidPid.Contains('+'))
{
separator = '+';
}
var position = deviceVidPid.IndexOf("vid_") + 4;
var vid = deviceVidPid.Substring(position, deviceVidPid.IndexOf(separator) - position);
position = deviceVidPid.IndexOf("pid_") + 4;
var pid = deviceVidPid.Substring(position, deviceVidPid.Length - position);
if (pid.Contains(separator))
{
pid = pid.Remove(pid.IndexOf(separator));
}
portInfo.DevicePid = int.Parse(pid, NumberStyles.AllowHexSpecifier, CultureInfo.InvariantCulture);
portInfo.DeviceVid = int.Parse(vid, NumberStyles.AllowHexSpecifier, CultureInfo.InvariantCulture);
}
catch
{
}
}
}
}
RegistryType type = RegistryType.REG_NONE;
UInt32 capacity;
StringBuilder data = new StringBuilder(256);
capacity = (UInt32)data.Capacity;
int result = Registry.RegQueryValueEx(hKey, "PortName", 0, ref type, data, ref capacity);
if ((result == Registry.ERROR_SUCCESS) & (type == RegistryType.REG_SZ))
{
portInfo.Name = data.ToString();
string property = GetDeviceRegistryProperty(hdevInfo, deviceInfoData, DeviceRegistryProperty.SPDRP_DEVICEDESC);
if (property != null)
{
portInfo.Description = property;
}
property = GetDeviceRegistryProperty(hdevInfo, deviceInfoData, DeviceRegistryProperty.SPDRP_MFG);
if (property != null)
{
portInfo.Manufacturer = property;
}
property = GetDeviceRegistryProperty(hdevInfo, deviceInfoData, DeviceRegistryProperty.SPDRP_FRIENDLYNAME);
if (property != null)
{
portInfo.FriendlyName = property;
}
property = GetDeviceRegistryProperty(hdevInfo, deviceInfoData, DeviceRegistryProperty.SPDRP_LOCATION_INFORMATION);
if (property != null)
{
portInfo.LocalInformation = property;
}
property = GetDeviceRegistryProperty(hdevInfo, deviceInfoData, DeviceRegistryProperty.SPDRP_SERVICE);
if (property != null)
{
portInfo.Service = property;
}
}
ports.Add(portInfo);
Registry.RegCloseKey(hKey);
}
}
SetupDi.SetupDiDestroyDeviceInfoList(hdevInfo);
//PatchInZModemSerials(ports);
return(new ReadOnlyCollection <SerialPortInfo>(ports));
}
