///<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///False if the device does not exists or is no longer valid.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;
SafeFileHandle sfhDev;
bool bSuccess = WinUsbAPI.OpenDevice(out sfhDev, mDevicePath);
if (bSuccess)
{
SafeWinUsbInterfaceHandle handle = new SafeWinUsbInterfaceHandle();
if ((bSuccess = WinUsbAPI.WinUsb_Initialize(sfhDev, ref handle)))
{
mSafeDevHandle = sfhDev;
mUsbHandle = handle;
mPowerPolicies = new PowerPolicies(this);
}
else
UsbError.Error(ErrorCode.Win32Error, Marshal.GetLastWin32Error(), "Open:Initialize", typeof (UsbDevice));
}
else
UsbError.Error(ErrorCode.Win32Error, Marshal.GetLastWin32Error(), "Open", typeof(UsbDevice));
return bSuccess;
}
/// <summary>
/// Opens a WinUsb directly from the user supplied device path.
/// </summary>
/// <param name="devicePath">Device path (symbolic link) of the WinUsb device to open.</param>
/// <param name="usbDevice">Returns an opened WinUsb device on success, null on failure.</param>
/// <returns>True on success.</returns>
public static bool Open(string devicePath, out WinUsbDevice usbDevice)
{
usbDevice = null;
SafeFileHandle sfhDev;
bool bSuccess = WinUsbAPI.OpenDevice(out sfhDev, devicePath);
if (bSuccess)
{
SafeWinUsbInterfaceHandle handle = new SafeWinUsbInterfaceHandle();
bSuccess = WinUsbAPI.WinUsb_Initialize(sfhDev, ref handle);
if (bSuccess)
{
usbDevice = new WinUsbDevice(WinUsbApi, sfhDev, handle, devicePath);
}
else
UsbError.Error(ErrorCode.Win32Error, Marshal.GetLastWin32Error(), "Open:Initialize", typeof(UsbDevice));
}
else
UsbError.Error(ErrorCode.Win32Error, Marshal.GetLastWin32Error(), "Open", typeof(UsbDevice));
return bSuccess;
}
/// <summary>
/// Gets an interface associated with this <see cref="WinUsbDevice"/>.
/// </summary>
/// <param name="associatedInterfaceIndex">The index to retrieve. (0 = next interface, 1= interface after next, etc.).</param>
/// <param name="usbDevice">A new <see cref="WinUsbDevice"/> class for the specified AssociatedInterfaceIndex.</param>
/// <returns>True on success.</returns>
public bool GetAssociatedInterface(byte associatedInterfaceIndex, out WinUsbDevice usbDevice)
{
usbDevice = null;
IntPtr pHandle = IntPtr.Zero;
bool bSuccess = WinUsbAPI.WinUsb_GetAssociatedInterface(mUsbHandle, associatedInterfaceIndex, ref pHandle);
if (bSuccess)
{
SafeWinUsbInterfaceHandle tempHandle = new SafeWinUsbInterfaceHandle(pHandle);
usbDevice = new WinUsbDevice(mUsbApi, null, tempHandle, mDevicePath);
}
if (!bSuccess)
UsbError.Error(ErrorCode.Win32Error, Marshal.GetLastWin32Error(), "GetAssociatedInterface", this);
return bSuccess;
}
