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diff --git a/lib/lufa/Demos/Host/LowLevel/MassStorageHost/ConfigDescriptor.h b/lib/lufa/Demos/Host/LowLevel/MassStorageHost/ConfigDescriptor.h
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+++ b/lib/lufa/Demos/Host/LowLevel/MassStorageHost/ConfigDescriptor.h
@@ -0,0 +1,78 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2017.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  Permission to use, copy, modify, distribute, and sell this
+  software and its documentation for any purpose is hereby granted
+  without fee, provided that the above copyright notice appear in
+  all copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaims all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *
+ *  Header file for ConfigDescriptor.c.
+ */
+
+#ifndef _CONFIGDESCRIPTOR_H_
+#define _CONFIGDESCRIPTOR_H_
+
+	/* Includes: */
+		#include <LUFA/Drivers/USB/USB.h>
+
+		#include "MassStorageHost.h"
+
+	/* Macros: */
+		/** Interface Class value for the Mass Storage Device class. */
+		#define MASS_STORE_CLASS               0x08
+
+		/** Interface Class value for the Mass Storage Device subclass. */
+		#define MASS_STORE_SUBCLASS            0x06
+
+		/** Interface Protocol value for the Bulk Only transport protocol. */
+		#define MASS_STORE_PROTOCOL            0x50
+
+		/** Pipe address of the Mass Storage data IN pipe. */
+		#define MASS_STORE_DATA_IN_PIPE        (PIPE_DIR_IN  | 1)
+
+		/** Pipe address of the Mass Storage data OUT pipe. */
+		#define MASS_STORE_DATA_OUT_PIPE       (PIPE_DIR_OUT | 2)
+
+	/* Enums: */
+		/** Enum for the possible return codes of the \ref ProcessConfigurationDescriptor() function. */
+		enum MassStorageHost_GetConfigDescriptorDataCodes_t
+		{
+			SuccessfulConfigRead            = 0, /**< Configuration Descriptor was processed successfully */
+			ControlError                    = 1, /**< A control request to the device failed to complete successfully */
+			DescriptorTooLarge              = 2, /**< The device's Configuration Descriptor is too large to process */
+			InvalidConfigDataReturned       = 3, /**< The device returned an invalid Configuration Descriptor */
+			NoCompatibleInterfaceFound      = 4, /**< A compatible interface with the required endpoints was not found */
+		};
+
+	/* Function Prototypes: */
+		uint8_t ProcessConfigurationDescriptor(void);
+
+		uint8_t DComp_NextMSInterface(void* CurrentDescriptor);
+		uint8_t DComp_NextMSInterfaceBulkDataEndpoint(void* CurrentDescriptor);
+
+#endif
+