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diff --git a/at91lib/usb/common/core/USBGenericDescriptor.h b/at91lib/usb/common/core/USBGenericDescriptor.h
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+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support 
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+/// \unit
+///
+/// !!!Purpose
+///
+/// Definition of a generic USB descriptor class.
+///
+/// !!!Usage
+///
+/// -# Declare or access USB descriptors by USBGenericDescriptor instance.
+/// -# To get usful information (field values) from the USB descriptors, use
+///    - USBGenericDescriptor_GetLength
+///    - USBGenericDescriptor_GetType
+/// -# To scan the descriptors, use
+///    - USBGenericDescriptor_GetNextDescriptor
+//------------------------------------------------------------------------------
+
+#ifndef USBGENERICDESCRIPTOR_H
+#define USBGENERICDESCRIPTOR_H
+
+//------------------------------------------------------------------------------
+//         Definitions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+/// \page "USB Descriptor types"
+///
+/// This page lists the codes of the usb descriptor types
+///
+/// !Types
+/// - USBGenericDescriptor_DEVICE
+/// - USBGenericDescriptor_CONFIGURATION
+/// - USBGenericDescriptor_STRING
+/// - USBGenericDescriptor_INTERFACE
+/// - USBGenericDescriptor_ENDPOINT
+/// - USBGenericDescriptor_DEVICEQUALIFIER
+/// - USBGenericDescriptor_OTHERSPEEDCONFIGURATION
+/// - USBGenericDescriptor_INTERFACEPOWER
+/// - USBGenericDescriptor_OTG
+/// - USBGenericDescriptor_DEBUG
+/// - USBGenericDescriptor_INTERFACEASSOCIATION
+
+/// Device descriptor type.
+#define USBGenericDescriptor_DEVICE                     1
+/// Configuration descriptor type.
+#define USBGenericDescriptor_CONFIGURATION              2
+/// String descriptor type.
+#define USBGenericDescriptor_STRING                     3
+/// Interface descriptor type.
+#define USBGenericDescriptor_INTERFACE                  4
+/// Endpoint descriptor type.
+#define USBGenericDescriptor_ENDPOINT                   5
+/// Device qualifier descriptor type.
+#define USBGenericDescriptor_DEVICEQUALIFIER            6
+/// Other speed configuration descriptor type.
+#define USBGenericDescriptor_OTHERSPEEDCONFIGURATION    7
+/// Interface power descriptor type.
+#define USBGenericDescriptor_INTERFACEPOWER             8
+/// On-The-Go descriptor type.
+#define USBGenericDescriptor_OTG                        9
+/// Debug descriptor type.
+#define USBGenericDescriptor_DEBUG                      10
+/// Interface association descriptor type.
+#define USBGenericDescriptor_INTERFACEASSOCIATION       11
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+//         Types
+//------------------------------------------------------------------------------
+
+#ifdef __ICCARM__          // IAR
+#pragma pack(1)            // IAR
+#define __attribute__(...) // IAR
+#endif                     // IAR
+
+/// Holds the few fields shared by all USB descriptors.
+typedef struct {
+
+    /// Length of the descriptor in bytes.
+    unsigned char bLength;
+    /// Descriptor type.
+    unsigned char bDescriptorType;
+
+} __attribute__ ((packed)) USBGenericDescriptor; // GCC
+
+#ifdef __ICCARM__          // IAR
+#pragma pack()             // IAR
+#endif                     // IAR
+
+//------------------------------------------------------------------------------
+//         Exported functions
+//------------------------------------------------------------------------------
+
+extern unsigned int USBGenericDescriptor_GetLength(
+    const USBGenericDescriptor *descriptor);
+
+extern unsigned char USBGenericDescriptor_GetType(
+    const USBGenericDescriptor *descriptor);
+
+extern USBGenericDescriptor *USBGenericDescriptor_GetNextDescriptor(
+    const USBGenericDescriptor *descriptor);
+
+#endif //#ifndef USBGENERICDESCRIPTOR_H
+