///<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 ///False if the device does not exists or is no longer valid.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; }