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diff --git a/digital/avr/modules/usb/lufa/LUFA/Drivers/AT90USBXXX/Serial_Stream.h b/digital/avr/modules/usb/lufa/LUFA/Drivers/AT90USBXXX/Serial_Stream.h
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+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2009.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.fourwalledcubicle.com
+*/
+
+/*
+ Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+ Permission to use, copy, modify, and distribute this software
+ and its documentation for any purpose and without fee is hereby
+ granted, 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 disclaim 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
+ *
+ * Serial stream driver for the USART subsystem on supported USB AVRs. This makes use of the functions in the
+ * regular USART driver, but allows the avr-libc standard stream functions (printf, puts, etc.) to work with the
+ * USART.
+ **/
+
+#ifndef __SERIAL_STREAM_H__
+#define __SERIAL_STREAM_H__
+
+ /* Includes: */
+ #include <avr/io.h>
+ #include <stdio.h>
+
+ #include "Serial.h"
+
+ /* Enable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ extern "C" {
+ #endif
+
+ /* Private Interface - For use in library only: */
+ #if !defined(__DOXYGEN__)
+ /* External Variables: */
+ extern FILE USARTStream;
+
+ /* Function Prototypes: */
+ int SerialStream_TxByte(char DataByte, FILE *Stream) ATTR_NON_NULL_PTR_ARG(2);
+ int SerialStream_RxByte(FILE *Stream) ATTR_NON_NULL_PTR_ARG(1);
+ #endif
+
+ /* Public Interface - May be used in end-application: */
+ /* Inline Functions: */
+ /** Initializes the serial stream (and regular USART driver) so that both the stream and regular
+ * USART driver functions can be used. Must be called before any stream or regular USART functions.
+ *
+ * \param BaudRate Baud rate to configure the USART to
+ * \param DoubleSpeed Enables double speed mode when set, halving the sample time to double the baud rate
+ */
+ static inline void SerialStream_Init(const uint32_t BaudRate, const bool DoubleSpeed)
+ {
+ Serial_Init(BaudRate, DoubleSpeed);
+
+ stdout = &USARTStream;
+ }
+
+ /* Disable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ }
+ #endif
+
+#endif