public static HIDDevice OpenDevice(string device_path, Type oType)
{
try
{
HIDDevice oNewDevice = (HIDDevice)Activator.CreateInstance(oType);
oNewDevice.Initialise(device_path);
return(oNewDevice);
}
catch (Exception ex)
{
throw HIDDeviceException.GenerateError(ex.ToString());
}
}
/// <summary>
/// Finds a device given its PID and VID
/// </summary>
/// <param name="nVid">Vendor id for device (VID)</param>
/// <param name="nPid">Product id for device (PID)</param>
/// <param name="oType">Type of device class to create</param>
/// <returns>A new device class of the given type or null</returns>
public static HIDDevice FindDevice(int nVid, int nPid, Type oType)
{
string strPath = string.Empty;
string strSearch = string.Format("vid_{0:x4}&pid_{1:x4}", nVid, nPid);
Guid gHid = HIDGuid;
HidD_GetHidGuid(out gHid);
IntPtr hInfoSet = SetupDiGetClassDevs(ref gHid, null, IntPtr.Zero, DIGCF_DEVICEINTERFACE | DIGCF_PRESENT);
try
{
int nIndex = 0;
DeviceInterfaceData oInterface = new DeviceInterfaceData();
oInterface.Size = Marshal.SizeOf(oInterface);
while (SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref gHid, (uint)nIndex, ref oInterface))
{
string strDevicePath = GetDevicePath(hInfoSet, ref oInterface);
if (strDevicePath.IndexOf(strSearch) >= 0)
{
HIDDevice oNewDevice = (HIDDevice)Activator.CreateInstance(oType);
oNewDevice.Initialise(strDevicePath);
return(oNewDevice);
}
nIndex++;
}
}
catch (Exception ex)
{
throw HIDDeviceException.GenerateError(ex.ToString());
}
finally
{
SetupDiDestroyDeviceInfoList(hInfoSet);
}
return(null);
}