///<summary>
/// Opens the USB device handle.
///</summary>
///<returns>
///True if the device is already opened or was opened successfully.
///False if the device does not exists or is no longer valid.
///</returns>
public override bool Open()
{
if (IsOpen)
{
return(true);
}
mUsbHandle = LibUsbDriverIO.OpenDevice(mDeviceFilename);
if (!IsOpen)
{
UsbError.Error(ErrorCode.Win32Error, Marshal.GetLastWin32Error(), "LibUsbDevice.Open Failed", this);
return(false);
}
return(true);
}
/// <summary>
/// Opens the USB device for communucation.
/// </summary>
/// <param name="deviceFilename">The LibUsb device filename to open.</param>
/// <param name="usbDevice">The newly created UsbDevice.</param>
/// <returns>True on success.</returns>
public static bool Open(string deviceFilename, out LibUsbDevice usbDevice)
{
usbDevice = null;
SafeFileHandle sfh = LibUsbDriverIO.OpenDevice(deviceFilename);
if (!sfh.IsClosed && !sfh.IsInvalid)
{
usbDevice = new LibUsbDevice(LibUsbApi, sfh, deviceFilename);
return(true);
}
else
{
// UsbDevice.Error(ErrorCode.DeviceNotFound, "The device is no longer attached or failed to open.", typeof(LibUsbDevice));
}
return(false);
}