Add new ARCH option to the makefiles to (eventually) specify the target device architecture. Update non-usb peripheral drivers to reflect future multiple architecture support.

6 files changed, 1462 insertions, 0 deletions

diff --git a/LUFA/Drivers/Peripheral/AVR8/ADC.h b/LUFA/Drivers/Peripheral/AVR8/ADC.h
new file mode 100644
index 000000000..99f70d14b
--- /dev/null
+++ b/LUFA/Drivers/Peripheral/AVR8/ADC.h
@@ -0,0 +1,453 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2011.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2011  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 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
+ *  \brief ADC Peripheral Driver (AVR8)
+ *
+ *  On-chip Analogue-to-Digital converter (ADC) driver for supported U4, U6 and U7 model AVRs that contain an ADC
+ *  peripheral internally.
+ *
+ *  \note This file should not be included directly. It is automatically included as needed by the ADC driver
+ *        dispatch header located in LUFA/Drivers/Peripheral/ADC.h.
+ */
+
+/** \ingroup Group_ADC
+ *  \defgroup Group_ADC_AVR8 ADC Peripheral Driver (AVR8)
+ *
+ *  \section Sec_ModDescription Module Description
+ *  On-chip Analogue-to-Digital converter (ADC) driver for supported U4, U6 and U7 model AVRs that contain an ADC
+ *  peripheral internally.
+ *
+ *  \note This file should not be included directly. It is automatically included as needed by the ADC driver
+ *        dispatch header located in LUFA/Drivers/Peripheral/ADC.h.
+ *
+ *  \section Sec_ExampleUsage Example Usage
+ *  The following snippet is an example of how this module may be used within a typical
+ *  application.
+ *
+ *  \code
+ *      // Initialise the ADC driver before first use
+ *      ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_32);
+ *
+ *      // Must setup the ADC channel to read beforehand
+ *      ADC_SetupChannel(1);
+ *
+ *      // Perform a single conversion of the ADC channel 1
+ *      ADC_GetChannelReading(ADC_REFERENCE_AVCC | ADC_RIGHT_ADJUSTED | ADC_CHANNEL1);
+ *      printf("Conversion Result: %d\r\n", ADC_GetResult());
+ *
+ *      // Start reading ADC channel 1 in free running (continuous conversion) mode
+ *      ADC_StartReading(ADC_REFERENCE_AVCC | ADC_RIGHT_ADJUSTED | ADC_CHANNEL1);
+ *      while (!(ADC_IsReadingComplete())) {};
+ *      printf("Conversion Result: %d\r\n", ADC_GetResult());
+ *  \endcode
+ *
+ *  @{
+ */
+
+#ifndef __ADC_AVR8_H__
+#define __ADC_AVR8_H__
+
+	/* Includes: */
+		#include "../../../Common/Common.h"
+
+	/* Enable C linkage for C++ Compilers: */
+		#if defined(__cplusplus)
+			extern "C" {
+		#endif
+
+	/* Preprocessor Checks: */
+		#if !defined(__INCLUDE_FROM_ADC_H)
+			#error Do not include this file directly. Include LUFA/Drivers/Peripheral/ADC.h instead.
+		#endif
+
+		#if !(defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__) || \
+		      defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB647__) || \
+			  defined(__AVR_ATmega16U4__)  || defined(__AVR_ATmega32U4__) || \
+			  defined(__AVR_ATmega32U6__))
+			#error The ADC peripheral driver is not currently available for your selected microcontroller model.
+		#endif
+
+	/* Private Interface - For use in library only: */
+	#if !defined(__DOXYGEN__)
+		/* Macros: */
+			#define _ADC_GET_MUX_MASK2(y)           ADC_CHANNEL ## y
+			#define _ADC_GET_MUX_MASK(y)            _ADC_GET_MUX_MASK2(y)
+	#endif
+	
+	/* Public Interface - May be used in end-application: */
+		/* Macros: */
+			/** \name ADC Reference Configuration Masks */
+			//@{
+			/** Reference mask, for using the voltage present at the AVR's AREF pin for the ADC reference. */
+			#define ADC_REFERENCE_AREF              0
+
+			/** Reference mask, for using the voltage present at the AVR's AVCC pin for the ADC reference. */
+			#define ADC_REFERENCE_AVCC              (1 << REFS0)
+
+			/** Reference mask, for using the internally generated 2.56V reference voltage as the ADC reference. */
+			#define ADC_REFERENCE_INT2560MV         ((1 << REFS1) | (1 << REFS0))
+			//@}
+			
+			/** \name ADC Result Adjustment Configuration Masks */
+			//@{
+			/** Left-adjusts the 10-bit ADC result, so that the upper 8 bits of the value returned by the
+			 *  \ref ADC_GetResult() macro contain the 8 most significant bits of the result.
+			 */
+			#define ADC_LEFT_ADJUSTED               (1 << ADLAR)
+
+			/** Right-adjusts the 10-bit ADC result, so that the lower 8 bits of the value returned by the
+			 *  \ref ADC_GetResult() macro contain the 8 least significant bits of the result.
+			 */
+			#define ADC_RIGHT_ADJUSTED              (0 << ADLAR)
+			//@}
+
+			/** \name ADC Mode Configuration Masks */
+			//@{
+			/** Sets the ADC mode to free running, so that conversions take place continuously as fast as the ADC
+			 *  is capable of at the given input clock speed.
+			 */
+			#define ADC_FREE_RUNNING                (1 << ADATE)
+
+			/** Sets the ADC mode to single conversion, so that only a single conversion will take place before
+			 *  the ADC returns to idle.
+			 */
+			#define ADC_SINGLE_CONVERSION           (0 << ADATE)
+			//@}
+			
+			/** \name ADC Prescaler Configuration Masks */
+			//@{
+			/** Sets the ADC input clock to prescale by a factor of 2 the AVR's system clock. */
+			#define ADC_PRESCALE_2                  (1 << ADPS0)
+
+			/** Sets the ADC input clock to prescale by a factor of 4 the AVR's system clock. */
+			#define ADC_PRESCALE_4                  (1 << ADPS1)
+
+			/** Sets the ADC input clock to prescale by a factor of 8 the AVR's system clock. */
+			#define ADC_PRESCALE_8                  ((1 << ADPS0) | (1 << ADPS1))
+
+			/** Sets the ADC input clock to prescale by a factor of 16 the AVR's system clock. */
+			#define ADC_PRESCALE_16                 (1 << ADPS2)
+
+			/** Sets the ADC input clock to prescale by a factor of 32 the AVR's system clock. */
+			#define ADC_PRESCALE_32                 ((1 << ADPS2) | (1 << ADPS0))
+
+			/** Sets the ADC input clock to prescale by a factor of 64 the AVR's system clock. */
+			#define ADC_PRESCALE_64                 ((1 << ADPS2) | (1 << ADPS1))
+
+			/** Sets the ADC input clock to prescale by a factor of 128 the AVR's system clock. */
+			#define ADC_PRESCALE_128                ((1 << ADPS2) | (1 << ADPS1) | (1 << ADPS0))
+			//@}
+
+			/** \name ADC MUX Masks */
+			//@{
+			/** MUX mask define for the ADC0 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading(). */
+			#define ADC_CHANNEL0                    (0x00 << MUX0)
+
+			/** MUX mask define for the ADC1 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading(). */
+			#define ADC_CHANNEL1                    (0x01 << MUX0)
+
+			#if !(defined(__AVR_ATmega16U4__)  || defined(__AVR_ATmega32U4__) || defined(__DOXYGEN__))
+				/** MUX mask define for the ADC2 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
+				 *
+				 *  \note Not available on all AVR models.
+				 */
+				#define ADC_CHANNEL2                (0x02 << MUX0)
+
+				/** MUX mask define for the ADC3 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
+				 *
+				 *  \note Not available on all AVR models.
+				 */
+				#define ADC_CHANNEL3                (0x03 << MUX0)
+			#endif
+
+			/** MUX mask define for the ADC4 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading(). */
+			#define ADC_CHANNEL4                    (0x04 << MUX0)
+
+			/** MUX mask define for the ADC5 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading(). */
+			#define ADC_CHANNEL5                    (0x05 << MUX0)
+
+			/** MUX mask define for the ADC6 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading(). */
+			#define ADC_CHANNEL6                    (0x06 << MUX0)
+
+			/** MUX mask define for the ADC7 channel of the ADC. See \ref ADC_StartReading and \ref ADC_GetChannelReading. */
+			#define ADC_CHANNEL7                    (0x07 << MUX0)
+
+			/** MUX mask define for the internal 1.1V bandgap channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading(). */
+			#define ADC_1100MV_BANDGAP              (0x1E << MUX0)
+
+			#if (defined(__AVR_ATmega16U4__)  || defined(__AVR_ATmega32U4__) || defined(__DOXYGEN__))
+				/** MUX mask define for the ADC8 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
+				 *
+				 *  \note Not available on all AVR models.
+				 */
+				#define ADC_CHANNEL8                ((1 << 8) | (0x00 << MUX0))
+
+				/** MUX mask define for the ADC9 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
+				 *
+				 *  \note Not available on all AVR models.
+				 */
+				#define ADC_CHANNEL9                ((1 << 8) | (0x01 << MUX0))
+
+				/** MUX mask define for the ADC10 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
+				 *
+				 *  \note Not available on all AVR models.
+				 */
+				#define ADC_CHANNEL10               ((1 << 8) | (0x02 << MUX0))
+
+				/** MUX mask define for the ADC11 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
+				 *
+				 *  \note Not available on all AVR models.
+				 */
+				#define ADC_CHANNEL11               ((1 << 8) | (0x03 << MUX0))
+
+				/** MUX mask define for the ADC12 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
+				 *
+				 *  \note Not available on all AVR models.
+				 */
+				#define ADC_CHANNEL12               ((1 << 8) | (0x04 << MUX0))
+
+				/** MUX mask define for the ADC13 channel of the ADC. See \ref ADC_StartReading() and \ref ADC_GetChannelReading().
+				 *
+				 *  \note Not available on all AVR models.
+				 */
+				#define ADC_CHANNEL13               ((1 << 8) | (0x05 << MUX0))
+
+				/** MUX mask define for the internal temperature sensor channel of the ADC. See \ref ADC_StartReading() and
+				 *  \ref ADC_GetChannelReading().
+				 *
+				 *  \note Not available on all AVR models.
+				 */
+				#define ADC_INT_TEMP_SENS           ((1 << 8) | (0x07 << MUX0))
+			#endif
+
+			/** Retrieves the ADC MUX mask for the given ADC channel number.
+			 *
+			 *  \note This macro will only work correctly on channel numbers that are compile-time
+			 *        constants defined by the preprocessor.
+			 *
+			 *  \param[in] Channel  Index of the ADC channel whose MUX mask is to be retrieved.
+			 */
+			#define ADC_GET_CHANNEL_MASK(Channel)   _ADC_GET_MUX_MASK(Channel)
+			//@}
+
+		/* Inline Functions: */
+			/** Configures the given ADC channel, ready for ADC conversions. This function sets the
+			 *  associated port pin as an input and disables the digital portion of the I/O to reduce
+			 *  power consumption.
+			 *
+			 *  \note This must only be called for ADC channels with are connected to a physical port
+			 *        pin of the AVR, denoted by its special alternative function ADCx.
+			 *        \n\n
+			 *
+			 *  \note The channel number must be specified as an integer, and <b>not</b> a \c ADC_CHANNEL* mask.
+			 *
+			 *  \param[in] ChannelIndex  ADC channel number to set up for conversions.
+			 */
+			static inline void ADC_SetupChannel(const uint8_t ChannelIndex)
+			{
+				#if (defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__) || \
+					 defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB647__) || \
+					 defined(__AVR_ATmega32U6__))
+				DDRF  &= ~(1 << ChannelIndex);
+				DIDR0 |=  (1 << ChannelIndex);
+				#elif (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__))
+				if (ChannelIndex < 8)
+				{
+					DDRF  &= ~(1 << ChannelIndex);
+					DIDR0 |=  (1 << ChannelIndex);
+				}
+				else if (ChannelIndex == 8)
+				{
+					DDRD  &= ~(1 << 4);
+					DIDR2 |=  (1 << 0);
+				}
+				else if (ChannelIndex < 11)
+				{
+					DDRD  &= ~(1 << (ChannelIndex - 3));
+					DIDR2 |=  (1 << (ChannelIndex - 8));
+				}
+				else
+				{
+					DDRB  &= ~(1 << (ChannelIndex - 7));
+					DIDR2 |=  (1 << (ChannelIndex - 8));
+				}
+				#endif
+			}
+
+			/** De-configures the given ADC channel, re-enabling digital I/O mode instead of analog. This
+			 *  function sets the associated port pin as an input and re-enabled the digital portion of
+			 *  the I/O.
+			 *
+			 *  \note This must only be called for ADC channels with are connected to a physical port
+			 *        pin of the AVR, denoted by its special alternative function ADCx.
+			 *        \n\n
+			 *
+			 *  \note The channel number must be specified as an integer, and <b>not</b> a \c ADC_CHANNEL* mask.
+			 *
+			 *  \param[in] ChannelIndex  ADC channel number to set up for conversions.
+			 */
+			static inline void ADC_DisableChannel(const uint8_t ChannelIndex)
+			{
+				#if (defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__) || \
+					 defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB647__) || \
+					 defined(__AVR_ATmega32U6__))
+				DDRF  &= ~(1 << ChannelIndex);
+				DIDR0 &= ~(1 << ChannelIndex);
+				#elif (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__))
+				if (ChannelIndex < 8)
+				{
+					DDRF  &= ~(1 << ChannelIndex);
+					DIDR0 &= ~(1 << ChannelIndex);
+				}
+				else if (ChannelIndex == 8)
+				{
+					DDRD  &= ~(1 << 4);
+					DIDR2 &= ~(1 << 0);
+				}
+				else if (ChannelIndex < 11)
+				{
+					DDRD  &= ~(1 << (ChannelIndex - 3));
+					DIDR2 &= ~(1 << (ChannelIndex - 8));
+				}
+				else
+				{
+					DDRB  &= ~(1 << (ChannelIndex - 7));
+					DIDR2 &= ~(1 << (ChannelIndex - 8));
+				}
+				#endif
+			}
+
+			/** Starts the reading of the given channel, but does not wait until the conversion has completed.
+			 *  Once executed, the conversion status can be determined via the \ref ADC_IsReadingComplete() macro and
+			 *  the result read via the \ref ADC_GetResult() macro.
+			 *
+			 *  If the ADC has been initialized in free running mode, calling this function once will begin the repeated
+			 *  conversions. If the ADC is in single conversion mode (or the channel to convert from is to be changed),
+			 *  this function must be called each time a conversion is to take place.
+			 *
+			 *  \param[in] MUXMask  ADC channel mask, reference mask and adjustment mask.
+			 */
+			static inline void ADC_StartReading(const uint16_t MUXMask)
+			{
+				ADMUX = MUXMask;
+
+				#if (defined(__AVR_ATmega16U4__)  || defined(__AVR_ATmega32U4__) || defined(__DOXYGEN__))
+				if (MUXMask & (1 << 8))
+				  ADCSRB |=  (1 << MUX5);
+				else
+				  ADCSRB &= ~(1 << MUX5);
+				#endif
+
+				ADCSRA |= (1 << ADSC);
+			}
+
+			/** Indicates if the current ADC conversion is completed, or still in progress.
+			 *
+			 *  \return Boolean false if the reading is still taking place, or true if the conversion is
+			 *          complete and ready to be read out with \ref ADC_GetResult().
+			 */
+			static inline bool ADC_IsReadingComplete(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
+			static inline bool ADC_IsReadingComplete(void)
+			{
+				return ((ADCSRA & (1 << ADIF)) ? true : false);
+			}
+
+			/** Retrieves the conversion value of the last completed ADC conversion and clears the reading
+			 *  completion flag.
+			 *
+			 *  \return The result of the last ADC conversion as an unsigned value.
+			 */
+			static inline uint16_t ADC_GetResult(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
+			static inline uint16_t ADC_GetResult(void)
+			{
+				ADCSRA |= (1 << ADIF);
+				return ADC;
+			}
+
+			/** Performs a complete single reading from channel, including a polling spin-loop to wait for the
+			 *  conversion to complete, and the returning of the converted value.
+			 *
+			 *  \note For free running mode, the automated conversions should be initialized with a single call
+			 *        to \ref ADC_StartReading() to select the channel and begin the automated conversions, and
+			 *        the results read directly from the \ref ADC_GetResult() instead to reduce overhead.
+			 *
+			 *  \param[in] MUXMask  Mask comprising of an ADC channel mask, reference mask and adjustment mask.
+			 */
+			static inline uint16_t ADC_GetChannelReading(const uint16_t MUXMask) ATTR_WARN_UNUSED_RESULT;
+			static inline uint16_t ADC_GetChannelReading(const uint16_t MUXMask)
+			{
+				ADC_StartReading(MUXMask);
+
+				while (!(ADC_IsReadingComplete()));
+
+				return ADC_GetResult();
+			}
+
+			/** Initialises the ADC, ready for conversions. This must be called before any other ADC operations.
+			 *  The "mode" parameter should be a mask comprised of a conversion mode (free running or single) and
+			 *  prescaler masks.
+			 *
+			 *  \param[in] Mode  Mask of ADC prescale and mode settings.
+			 */
+			static inline void ADC_Init(uint8_t Mode) ATTR_ALWAYS_INLINE;
+			static inline void ADC_Init(uint8_t Mode)
+			{
+				ADCSRA = ((1 << ADEN) | Mode);
+			}
+
+			/** Turns off the ADC. If this is called, any further ADC operations will require a call to
+			 *  \ref ADC_Init() before the ADC can be used again.
+			 */
+			static inline void ADC_Disable(void) ATTR_ALWAYS_INLINE;
+			static inline void ADC_Disable(void)
+			{
+				ADCSRA = 0;
+			}
+
+			/** Indicates if the ADC is currently enabled.
+			 *
+			 *  \return Boolean \c true if the ADC subsystem is currently enabled, \c false otherwise.
+			 */
+			static inline bool ADC_GetStatus(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
+			static inline bool ADC_GetStatus(void)
+			{
+				return ((ADCSRA & (1 << ADEN)) ? true : false);
+			}
+
+	/* Disable C linkage for C++ Compilers: */
+		#if defined(__cplusplus)
+			}
+		#endif
+
+#endif
+
+/** @} */
+
diff --git a/LUFA/Drivers/Peripheral/AVR8/SPI.h b/LUFA/Drivers/Peripheral/AVR8/SPI.h
new file mode 100644
index 000000000..d800fca1a
--- /dev/null
+++ b/LUFA/Drivers/Peripheral/AVR8/SPI.h
@@ -0,0 +1,239 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2011.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2011  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 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
+ *  \brief SPI Peripheral Driver (AVR8)
+ *
+ *  On-chip SPI driver for the 8-bit AVR microcontrollers.
+ *
+ *  \note This file should not be included directly. It is automatically included as needed by the SPI driver
+ *        dispatch header located in LUFA/Drivers/Peripheral/SPI.h.
+ */
+
+/** \ingroup Group_SPI
+ *  \defgroup Group_SPI_AVR8 SPI Peripheral Driver (AVR8)
+ *
+ *  \section Sec_ModDescription Module Description
+ *  Driver for the hardware SPI port available on most 8-bit AVR microcontroller models. This
+ *  module provides an easy to use driver for the setup and transfer of data over the
+ *  AVR's SPI port.
+ *
+ *  \note This file should not be included directly. It is automatically included as needed by the SPI driver
+ *        dispatch header located in LUFA/Drivers/Peripheral/SPI.h.
+ *
+ *  \section Sec_ExampleUsage Example Usage
+ *  The following snippet is an example of how this module may be used within a typical
+ *  application.
+ *
+ *  \code
+ *      // Initialise the SPI driver before first use
+ *      SPI_Init(SPI_SPEED_FCPU_DIV_2 | SPI_ORDER_MSB_FIRST | SPI_SCK_LEAD_FALLING |
+ *               SPI_SAMPLE_TRAILING | SPI_MODE_MASTER);
+ *
+ *      // Send several bytes, ignoring the returned data
+ *      SPI_SendByte(0x01);
+ *      SPI_SendByte(0x02);
+ *      SPI_SendByte(0x03);
+ *
+ *      // Receive several bytes, sending a dummy 0x00 byte each time
+ *      uint8_t Byte1 = SPI_ReceiveByte();
+ *      uint8_t Byte2 = SPI_ReceiveByte();
+ *      uint8_t Byte3 = SPI_ReceiveByte();
+ *
+ *      // Send a byte, and store the received byte from the same transaction
+ *      uint8_t ResponseByte = SPI_TransferByte(0xDC);
+ *  \endcode
+ * 
+ *  @{
+ */
+
+#ifndef __SPI_AVR8_H__
+#define __SPI_AVR8_H__
+
+	/* Includes: */
+		#include "../../../Common/Common.h"
+
+	/* Enable C linkage for C++ Compilers: */
+		#if defined(__cplusplus)
+			extern "C" {
+		#endif
+
+	/* Preprocessor Checks: */
+		#if !defined(__INCLUDE_FROM_SPI_H)
+			#error Do not include this file directly. Include LUFA/Drivers/Peripheral/SPI.h instead.
+		#endif
+
+	/* Private Interface - For use in library only: */
+	#if !defined(__DOXYGEN__)
+		/* Macros: */
+			#define SPI_USE_DOUBLESPEED            (1 << SPE)
+	#endif
+
+	/* Public Interface - May be used in end-application: */
+		/* Macros: */
+			/** \name SPI Prescaler Configuration Masks */
+			//@{
+			/** SPI prescaler mask for \c SPI_Init(). Divides the system clock by a factor of 2. */
+			#define SPI_SPEED_FCPU_DIV_2           SPI_USE_DOUBLESPEED
+
+			/** SPI prescaler mask for \c SPI_Init(). Divides the system clock by a factor of 4. */
+			#define SPI_SPEED_FCPU_DIV_4           0
+
+			/** SPI prescaler mask for \c SPI_Init(). Divides the system clock by a factor of 8. */
+			#define SPI_SPEED_FCPU_DIV_8           (SPI_USE_DOUBLESPEED | (1 << SPR0))
+
+			/** SPI prescaler mask for \c SPI_Init(). Divides the system clock by a factor of 16. */
+			#define SPI_SPEED_FCPU_DIV_16          (1 << SPR0)
+
+			/** SPI prescaler mask for \c SPI_Init(). Divides the system clock by a factor of 32. */
+			#define SPI_SPEED_FCPU_DIV_32          (SPI_USE_DOUBLESPEED | (1 << SPR1))
+
+			/** SPI prescaler mask for \c SPI_Init(). Divides the system clock by a factor of 64. */
+			#define SPI_SPEED_FCPU_DIV_64          (SPI_USE_DOUBLESPEED | (1 << SPR1) | (1 << SPR0))
+
+			/** SPI prescaler mask for \c SPI_Init(). Divides the system clock by a factor of 128. */
+			#define SPI_SPEED_FCPU_DIV_128         ((1 << SPR1) | (1 << SPR0))
+			//@}
+
+			/** \name SPI SCK Polarity Configuration Masks */
+			//@{
+			/** SPI clock polarity mask for \c SPI_Init(). Indicates that the SCK should lead on the rising edge. */
+			#define SPI_SCK_LEAD_RISING            (0 << CPOL)
+
+			/** SPI clock polarity mask for \c SPI_Init(). Indicates that the SCK should lead on the falling edge. */
+			#define SPI_SCK_LEAD_FALLING           (1 << CPOL)
+			//@}
+
+			/** \name SPI Sample Edge Configuration Masks */
+			//@{
+			/** SPI data sample mode mask for \c SPI_Init(). Indicates that the data should sampled on the leading edge. */
+			#define SPI_SAMPLE_LEADING             (0 << CPHA)
+
+			/** SPI data sample mode mask for \c SPI_Init(). Indicates that the data should be sampled on the trailing edge. */
+			#define SPI_SAMPLE_TRAILING            (1 << CPHA)
+			//@}
+			
+			/** \name SPI Data Ordering Configuration Masks */
+			//@{
+			/** SPI data order mask for \c SPI_Init(). Indicates that data should be shifted out MSB first. */
+			#define SPI_ORDER_MSB_FIRST            (0 << DORD)
+
+			/** SPI data order mask for \c SPI_Init(). Indicates that data should be shifted out MSB first. */
+			#define SPI_ORDER_LSB_FIRST            (1 << DORD)
+			//@}
+			
+			/** \name SPI Mode Configuration Masks */
+			//@{
+			/** SPI mode mask for \c SPI_Init(). Indicates that the SPI interface should be initialized into slave mode. */
+			#define SPI_MODE_SLAVE                 (0 << MSTR)
+
+			/** SPI mode mask for \c SPI_Init(). Indicates that the SPI interface should be initialized into master mode. */
+			#define SPI_MODE_MASTER                (1 << MSTR)
+			//@}
+			
+		/* Inline Functions: */
+			/** Initialises the SPI subsystem, ready for transfers. Must be called before calling any other
+			 *  SPI routines.
+			 *
+			 *  \param[in] SPIOptions  SPI Options, a mask consisting of one of each of the \c SPI_SPEED_*,
+			 *                         \c SPI_SCK_*, \c SPI_SAMPLE_*, \c SPI_ORDER_* and \c SPI_MODE_* masks.
+			 */
+			static inline void SPI_Init(const uint8_t SPIOptions)
+			{
+				DDRB  |=  ((1 << 1) | (1 << 2));
+				DDRB  &= ~((1 << 0) | (1 << 3));
+				PORTB |=  ((1 << 0) | (1 << 3));
+
+				SPCR   = ((1 << SPE) | SPIOptions);
+
+				if (SPIOptions & SPI_USE_DOUBLESPEED)
+				  SPSR |= (1 << SPI2X);
+				else
+				  SPSR &= ~(1 << SPI2X);
+			}
+
+			/** Turns off the SPI driver, disabling and returning used hardware to their default configuration. */
+			static inline void SPI_Disable(void)
+			{
+				DDRB  &= ~((1 << 1) | (1 << 2));
+				PORTB &= ~((1 << 0) | (1 << 3));
+
+				SPCR   = 0;
+				SPSR   = 0;
+			}
+
+			/** Sends and receives a byte through the SPI interface, blocking until the transfer is complete.
+			 *
+			 *  \param[in] Byte  Byte to send through the SPI interface.
+			 *
+			 *  \return Response byte from the attached SPI device.
+			 */
+			static inline uint8_t SPI_TransferByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
+			static inline uint8_t SPI_TransferByte(const uint8_t Byte)
+			{
+				SPDR = Byte;
+				while (!(SPSR & (1 << SPIF)));
+				return SPDR;
+			}
+
+			/** Sends a byte through the SPI interface, blocking until the transfer is complete. The response
+			 *  byte sent to from the attached SPI device is ignored.
+			 *
+			 *  \param[in] Byte  Byte to send through the SPI interface.
+			 */
+			static inline void SPI_SendByte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
+			static inline void SPI_SendByte(const uint8_t Byte)
+			{
+				SPDR = Byte;
+				while (!(SPSR & (1 << SPIF)));
+			}
+
+			/** Sends a dummy byte through the SPI interface, blocking until the transfer is complete. The response
+			 *  byte from the attached SPI device is returned.
+			 *
+			 *  \return The response byte from the attached SPI device.
+			 */
+			static inline uint8_t SPI_ReceiveByte(void) ATTR_ALWAYS_INLINE ATTR_WARN_UNUSED_RESULT;
+			static inline uint8_t SPI_ReceiveByte(void)
+			{
+				SPDR = 0x00;
+				while (!(SPSR & (1 << SPIF)));
+				return SPDR;
+			}
+
+	/* Disable C linkage for C++ Compilers: */
+		#if defined(__cplusplus)
+			}
+		#endif
+
+#endif
+
+/** @} */
+
diff --git a/LUFA/Drivers/Peripheral/AVR8/Serial.c b/LUFA/Drivers/Peripheral/AVR8/Serial.c
new file mode 100644
index 000000000..3a8312d85
--- /dev/null
+++ b/LUFA/Drivers/Peripheral/AVR8/Serial.c
@@ -0,0 +1,89 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2011.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2011  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 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.
+*/
+
+#define  __INCLUDE_FROM_SERIAL_C
+#include "Serial.h"
+
+FILE USARTSerialStream;
+
+int Serial_putchar(char DataByte,
+                   FILE *Stream)
+{
+	(void)Stream;
+
+	Serial_SendByte(DataByte);
+	return 0;
+}
+
+int Serial_getchar(FILE *Stream)
+{
+	(void)Stream;
+
+	if (!(Serial_IsCharReceived()))
+	  return _FDEV_EOF;
+
+	return Serial_ReceiveByte();
+}
+
+int Serial_getchar_Blocking(FILE *Stream)
+{
+	(void)Stream;
+
+	while (!(Serial_IsCharReceived()));
+	return Serial_ReceiveByte();
+}
+
+void Serial_SendString_P(const char* FlashStringPtr)
+{
+	uint8_t CurrByte;
+
+	while ((CurrByte = pgm_read_byte(FlashStringPtr)) != 0x00)
+	{
+		Serial_SendByte(CurrByte);
+		FlashStringPtr++;
+	}
+}
+
+void Serial_SendString(const char* StringPtr)
+{
+	uint8_t CurrByte;
+
+	while ((CurrByte = *StringPtr) != 0x00)
+	{
+		Serial_SendByte(CurrByte);
+		StringPtr++;
+	}
+}
+
+void Serial_SendData(const uint8_t* Buffer, uint16_t Length)
+{
+	while (Length--)
+	  Serial_SendByte(*(Buffer++));
+}
diff --git a/LUFA/Drivers/Peripheral/AVR8/Serial.h b/LUFA/Drivers/Peripheral/AVR8/Serial.h
new file mode 100644
index 000000000..bb9ba856e
--- /dev/null
+++ b/LUFA/Drivers/Peripheral/AVR8/Serial.h
@@ -0,0 +1,251 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2011.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2011  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 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
+ *  \brief Serial USART Peripheral Driver (AVR8)
+ *
+ *  On-chip serial USART driver for the 8-bit AVR microcontrollers.
+ *
+ *  \note This file should not be included directly. It is automatically included as needed by the USART driver
+ *        dispatch header located in LUFA/Drivers/Peripheral/Serial.h.
+ */
+
+/** \ingroup Group_Serial
+ *  \defgroup Group_Serial_AVR8 Serial USART Peripheral Driver (AVR8)
+ *
+ *  \section Sec_ModDescription Module Description
+ *  On-chip serial USART driver for the 8-bit AVR microcontrollers.
+ *
+ *  \note This file should not be included directly. It is automatically included as needed by the ADC driver
+ *        dispatch header located in LUFA/Drivers/Peripheral/Serial.h.
+ *
+ *  \section Sec_ExampleUsage Example Usage
+ *  The following snippet is an example of how this module may be used within a typical
+ *  application.
+ *
+ *  \code
+ *      // Initialise the serial USART driver before first use, with 9600 baud (and no double-speed mode)
+ *      Serial_Init(9600, false);
+ *
+ *      // Send a string through the USART
+ *      Serial_TxString("Test String\r\n");
+ *
+ *      // Receive a byte through the USART
+ *      uint8_t DataByte = Serial_RxByte();
+ *  \endcode
+ *
+ *  @{
+ */
+
+#ifndef __SERIAL_AVR8_H__
+#define __SERIAL_AVR8_H__
+
+	/* Includes: */
+		#include "../../../Common/Common.h"
+		#include "../../Misc/TerminalCodes.h"
+		
+		#include <stdio.h>
+
+	/* Enable C linkage for C++ Compilers: */
+		#if defined(__cplusplus)
+			extern "C" {
+		#endif
+
+	/* Preprocessor Checks: */
+		#if !defined(__INCLUDE_FROM_SERIAL_H) && !defined(__INCLUDE_FROM_SERIAL_C)
+			#error Do not include this file directly. Include LUFA/Drivers/Peripheral/Serial.h instead.
+		#endif
+
+	/* Private Interface - For use in library only: */
+	#if !defined(__DOXYGEN__)
+		/* External Variables: */
+			extern FILE USARTSerialStream;
+	
+		/* Function Prototypes: */
+			int Serial_putchar(char DataByte,
+			                   FILE *Stream);
+			int Serial_getchar(FILE *Stream);
+			int Serial_getchar_Blocking(FILE *Stream);
+	#endif
+
+	/* Public Interface - May be used in end-application: */
+		/* Macros: */
+			/** Macro for calculating the baud value from a given baud rate when the U2X (double speed) bit is
+			 *  not set.
+			 */
+			#define SERIAL_UBBRVAL(baud)    ((((F_CPU / 16) + (baud / 2)) / (baud)) - 1)
+
+			/** Macro for calculating the baud value from a given baud rate when the U2X (double speed) bit is
+			 *  set.
+			 */
+			#define SERIAL_2X_UBBRVAL(baud) ((((F_CPU / 8) + (baud / 2)) / (baud)) - 1)
+
+		/* Function Prototypes: */
+			/** Transmits a given string located in program space (FLASH) through the USART.
+			 *
+			 *  \param[in] FlashStringPtr  Pointer to a string located in program space.
+			 */
+			void Serial_SendString_P(const char* FlashStringPtr) ATTR_NON_NULL_PTR_ARG(1);
+
+			/** Transmits a given string located in SRAM memory through the USART.
+			 *
+			 *  \param[in] StringPtr  Pointer to a string located in SRAM space.
+			 */
+			void Serial_SendString(const char* StringPtr) ATTR_NON_NULL_PTR_ARG(1);
+			
+			/** Transmits a given buffer located in SRAM memory through the USART.
+			 *
+			 *  \param[in] Buffer  Pointer to a buffer containing the data to send.
+			 *  \param[in] Length  Length of the data to send, in bytes.
+			 */
+			void Serial_SendData(const uint8_t* Buffer, uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
+
+		/* Inline Functions: */
+			/** Initializes the USART, ready for serial data transmission and reception. This initializes the interface to
+			 *  standard 8-bit, no parity, 1 stop bit settings suitable for most applications.
+			 *
+			 *  \param[in] BaudRate     Serial baud rate, in bits per second.
+			 *  \param[in] DoubleSpeed  Enables double speed mode when set, halving the sample time to double the baud rate.
+			 */
+			static inline void Serial_Init(const uint32_t BaudRate,
+			                               const bool DoubleSpeed)
+			{
+				UBRR1  = (DoubleSpeed ? SERIAL_2X_UBBRVAL(BaudRate) : SERIAL_UBBRVAL(BaudRate));
+
+				UCSR1C = ((1 << UCSZ11) | (1 << UCSZ10));
+				UCSR1A = (DoubleSpeed ? (1 << U2X1) : 0);
+				UCSR1B = ((1 << TXEN1)  | (1 << RXEN1));
+
+				DDRD  |= (1 << 3);
+				PORTD |= (1 << 2);
+			}
+
+			/** Turns off the USART driver, disabling and returning used hardware to their default configuration. */
+			static inline void Serial_Disable(void)
+			{
+				UCSR1B = 0;
+				UCSR1A = 0;
+				UCSR1C = 0;
+
+				UBRR1  = 0;
+
+				DDRD  &= ~(1 << 3);
+				PORTD &= ~(1 << 2);
+			}
+
+			/** Creates a standard character stream from the USART so that it can be used with all the regular functions
+			 *  in the avr-libc \c <stdio.h> library that accept a \c FILE stream as a destination (e.g. \c fprintf). The created
+			 *  stream is bidirectional and can be used for both input and output functions.
+			 *
+			 *  Reading data from this stream is non-blocking, i.e. in most instances, complete strings cannot be read in by a single
+			 *  fetch, as the endpoint will not be ready at some point in the transmission, aborting the transfer. However, this may
+			 *  be used when the read data is processed byte-per-bye (via \c getc()) or when the user application will implement its own
+			 *  line buffering.
+			 *
+			 *  \param[in,out] Stream  Pointer to a FILE structure where the created stream should be placed, if \c NULL stdio
+			 *                         and stdin will be configured to use the USART.
+			 *
+			 *  \pre The USART must first be configured via a call to \ref Serial_Init() before the stream is used.
+			 */
+			static inline void Serial_CreateStream(FILE* Stream)
+			{
+				if (!(Stream))
+				{
+					Stream = &USARTSerialStream;
+					stdin  = Stream;
+					stdout = Stream;
+				}
+			
+				*Stream = (FILE)FDEV_SETUP_STREAM(Serial_putchar, Serial_getchar, _FDEV_SETUP_RW);
+			}
+
+			/** Identical to \ref Serial_CreateStream(), except that reads are blocking until the calling stream function terminates
+			 *  the transfer.
+			 *
+			 *  \param[in,out] Stream  Pointer to a FILE structure where the created stream should be placed, if \c NULL stdio
+			 *                         and stdin will be configured to use the USART.
+			 *
+			 *  \pre The USART must first be configured via a call to \ref Serial_Init() before the stream is used.
+			 */
+			static inline void Serial_CreateBlockingStream(FILE* Stream)
+			{
+				if (!(Stream))
+				{
+					Stream = &USARTSerialStream;
+					stdin  = Stream;
+					stdout = Stream;
+				}
+
+				*Stream = (FILE)FDEV_SETUP_STREAM(Serial_putchar, Serial_getchar_Blocking, _FDEV_SETUP_RW);
+			}
+
+			/** Indicates whether a character has been received through the USART.
+			 *
+			 *  \return Boolean \c true if a character has been received, \c false otherwise.
+			 */
+			static inline bool Serial_IsCharReceived(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
+			static inline bool Serial_IsCharReceived(void)
+			{
+				return ((UCSR1A & (1 << RXC1)) ? true : false);
+			}
+
+			/** Transmits a given byte through the USART.
+			 *
+			 *  \param[in] DataByte  Byte to transmit through the USART.
+			 */
+			static inline void Serial_SendByte(const char DataByte) ATTR_ALWAYS_INLINE;
+			static inline void Serial_SendByte(const char DataByte)
+			{
+				while (!(UCSR1A & (1 << UDRE1)));
+				UDR1 = DataByte;
+			}
+
+			/** Receives the next byte from the USART.
+			 *
+			 *  \return Next byte received from the USART, or a negative value if no byte has been received.
+			 */
+			static inline int16_t Serial_ReceiveByte(void) ATTR_ALWAYS_INLINE;
+			static inline int16_t Serial_ReceiveByte(void)
+			{
+				if (!(Serial_IsCharReceived()))
+				  return -1;
+				
+				return UDR1;
+			}
+
+	/* Disable C linkage for C++ Compilers: */
+		#if defined(__cplusplus)
+			}
+		#endif
+
+#endif
+
+/** @} */
+
diff --git a/LUFA/Drivers/Peripheral/AVR8/TWI.c b/LUFA/Drivers/Peripheral/AVR8/TWI.c
new file mode 100644
index 000000000..b5f258dd3
--- /dev/null
+++ b/LUFA/Drivers/Peripheral/AVR8/TWI.c
@@ -0,0 +1,144 @@
+/*
+     Copyright (C) Dean Camera, 2011.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+#define  __INCLUDE_FROM_TWI_C
+#include "TWI.h"
+
+uint8_t TWI_StartTransmission(const uint8_t SlaveAddress,
+                              const uint8_t TimeoutMS)
+{
+	for (;;)
+	{
+		bool     BusCaptured = false;
+		uint16_t TimeoutRemaining;
+
+		TWCR = ((1 << TWINT) | (1 << TWSTA) | (1 << TWEN));
+
+		TimeoutRemaining = (TimeoutMS * 100);
+		while (TimeoutRemaining-- && !(BusCaptured))
+		{
+			if (TWCR & (1 << TWINT))
+			{
+				switch (TWSR & TW_STATUS_MASK)
+				{
+					case TW_START:
+					case TW_REP_START:
+						BusCaptured = true;
+						break;
+					case TW_MT_ARB_LOST:
+						TWCR = ((1 << TWINT) | (1 << TWSTA) | (1 << TWEN));
+						continue;
+					default:
+						TWCR = (1 << TWEN);
+						return TWI_ERROR_BusFault;
+				}
+			}
+
+			_delay_us(10);
+		}
+
+		if (!(TimeoutRemaining))
+		{
+			TWCR = (1 << TWEN);
+			return TWI_ERROR_BusCaptureTimeout;
+		}
+
+		TWDR = SlaveAddress;
+		TWCR = ((1 << TWINT) | (1 << TWEN));
+
+		TimeoutRemaining = (TimeoutMS * 100);
+		while (TimeoutRemaining--)
+		{
+			if (TWCR & (1 << TWINT))
+			  break;
+
+			_delay_us(10);
+		}
+
+		if (!(TimeoutRemaining))
+		  return TWI_ERROR_SlaveResponseTimeout;
+
+		switch (TWSR & TW_STATUS_MASK)
+		{
+			case TW_MT_SLA_ACK:
+			case TW_MR_SLA_ACK:
+				return TWI_ERROR_NoError;
+			default:
+				TWCR = ((1 << TWINT) | (1 << TWSTO) | (1 << TWEN));
+				return TWI_ERROR_SlaveNotReady;
+		}
+	}
+}
+
+uint8_t TWI_ReadPacket(const uint8_t SlaveAddress,
+                       const uint8_t TimeoutMS,
+                       const uint8_t* InternalAddress,
+                       uint8_t InternalAddressLen,
+                       uint8_t* Buffer,
+                       uint8_t Length)
+{
+	uint8_t ErrorCode;
+	
+	if ((ErrorCode = TWI_WritePacket(SlaveAddress, TimeoutMS, InternalAddress, InternalAddressLen,
+	                                 NULL, 0)) != TWI_ERROR_NoError)
+	{
+		return ErrorCode;
+	}
+
+	if ((ErrorCode = TWI_StartTransmission((SlaveAddress & TWI_DEVICE_ADDRESS_MASK) | TWI_ADDRESS_READ,
+										   TimeoutMS)) == TWI_ERROR_NoError)
+	{
+		while (Length--)
+		{
+			if (!(TWI_ReceiveByte(Buffer++, (Length == 0))))
+			{
+				ErrorCode = TWI_ERROR_SlaveNAK;
+				break;
+			}
+		}
+		
+		TWI_StopTransmission();
+	}
+	
+	return ErrorCode;
+}
+
+uint8_t TWI_WritePacket(const uint8_t SlaveAddress,
+                        const uint8_t TimeoutMS,
+                        const uint8_t* InternalAddress,
+                        uint8_t InternalAddressLen,
+                        const uint8_t* Buffer,
+                        uint8_t Length)
+{
+	uint8_t ErrorCode;
+
+	if ((ErrorCode = TWI_StartTransmission((SlaveAddress & TWI_DEVICE_ADDRESS_MASK) | TWI_ADDRESS_WRITE,
+	                                       TimeoutMS)) == TWI_ERROR_NoError)
+	{
+		while (InternalAddressLen--)
+		{
+			if (!(TWI_SendByte(*(InternalAddress++))))
+			{
+				ErrorCode = TWI_ERROR_SlaveNAK;
+				break;
+			}
+		}
+
+		while (Length--)
+		{
+			if (!(TWI_SendByte(*(Buffer++))))
+			{
+				ErrorCode = TWI_ERROR_SlaveNAK;
+				break;
+			}
+		}
+		
+		TWI_StopTransmission();
+	}
+	
+	return ErrorCode;
+}
diff --git a/LUFA/Drivers/Peripheral/AVR8/TWI.h b/LUFA/Drivers/Peripheral/AVR8/TWI.h
new file mode 100644
index 000000000..e03423385
--- /dev/null
+++ b/LUFA/Drivers/Peripheral/AVR8/TWI.h
@@ -0,0 +1,286 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2011.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2011  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 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
+ *  \brief TWI Peripheral Driver (AVR8)
+ *
+ *  On-chip TWI driver for the 8-bit AVR microcontrollers.
+ *
+ *  \note This file should not be included directly. It is automatically included as needed by the TWI driver
+ *        dispatch header located in LUFA/Drivers/Peripheral/TWI.h.
+ */
+
+/** \ingroup Group_TWI
+ *  \defgroup Group_TWI_AVR8 TWI Peripheral Driver (AVR8)
+ *
+ *  \section Sec_ModDescription Module Description
+ *  Master mode TWI driver for the 8-bit AVR microcontrollers which contain a hardware TWI module.
+ *
+ *  \note This file should not be included directly. It is automatically included as needed by the TWI driver
+ *        dispatch header located in LUFA/Drivers/Peripheral/TWI.h.
+ *
+ *  \section Sec_ExampleUsage Example Usage
+ *  The following snippet is an example of how this module may be used within a typical
+ *  application.
+ *
+ *  <b>Low Level API Example:</b>
+ *  \code
+ *      // Initialise the TWI driver before first use
+ *      TWI_Init();
+ *
+ *      // Start a write session to device at device address 0xA0, internal address 0xDC with a 10ms timeout
+ *      if (TWI_StartTransmission(0xA0 | TWI_ADDRESS_WRITE, 10))
+ *      {
+ *          TWI_SendByte(0xDC);
+ *
+ *          TWI_SendByte(0x01);
+ *          TWI_SendByte(0x02);
+ *          TWI_SendByte(0x03);
+ *
+ *          // Must stop transmission afterwards to release the bus
+ *          TWI_StopTransmission();
+ *      }
+ *
+ *      // Start a read session to device at address 0xA0, internal address 0xDC with a 10ms timeout
+ *      if (TWI_StartTransmission(0xA0 | TWI_ADDRESS_WRITE, 10))
+ *      {
+ *          TWI_SendByte(0xDC);
+ *          TWI_StopTransmission();
+ *
+ *          if (TWI_StartTransmission(0xA0 | TWI_ADDRESS_READ, 10))
+ *          {
+ *              uint8_t Byte1, Byte2, Byte3;
+ *
+ *              // Read three bytes, acknowledge after the third byte is received
+ *              TWI_ReceiveByte(&Byte1, false);
+ *              TWI_ReceiveByte(&Byte2, false);
+ *              TWI_ReceiveByte(&Byte3, true);
+ *
+ *              // Must stop transmission afterwards to release the bus
+ *              TWI_StopTransmission();
+ *          }
+ *      }
+ *  \endcode
+ * 
+ *  <b>High Level API Example:</b>
+ *  \code
+ *      // Initialise the TWI driver before first use
+ *      TWI_Init();
+ *
+ *      // Start a write session to device at device address 0xA0, internal address 0xDC with a 10ms timeout
+ *      uint8_t InternalWriteAddress = 0xDC;
+ *      uint8_t WritePacket[3] = {0x01, 0x02, 0x03};
+ *
+ *      TWI_WritePacket(0xA0, 10, &InternalWriteAddress, sizeof(InternalWriteAddress),
+ *                      &WritePacket, sizeof(WritePacket);
+ *
+ *      // Start a read session to device at address 0xA0, internal address 0xDC with a 10ms timeout
+ *      uint8_t InternalReadAddress = 0xDC;
+ *      uint8_t ReadPacket[3];
+ *
+ *      TWI_ReadPacket(0xA0, 10, &InternalReadAddress, sizeof(InternalReadAddress),
+ *                     &ReadPacket, sizeof(ReadPacket);
+ *  \endcode
+ *
+ *  @{
+ */
+
+#ifndef __TWI_AVR8_H__
+#define __TWI_AVR8_H__
+
+	/* Includes: */
+		#include "../../../Common/Common.h"
+
+		#include <stdio.h>
+		#include <util/twi.h>
+
+	/* Enable C linkage for C++ Compilers: */
+		#if defined(__cplusplus)
+			extern "C" {
+		#endif
+
+	/* Preprocessor Checks: */
+		#if !defined(__INCLUDE_FROM_TWI_H) && !defined(__INCLUDE_FROM_TWI_C)
+			#error Do not include this file directly. Include LUFA/Drivers/Peripheral/TWI.h instead.
+		#endif
+
+		#if !(defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__) || \
+		      defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB647__) || \
+			  defined(__AVR_ATmega16U4__)  || defined(__AVR_ATmega32U4__) || \
+			  defined(__AVR_ATmega32U6__))
+			#error The TWI peripheral driver is not currently available for your selected microcontroller model.
+		#endif
+
+	/* Public Interface - May be used in end-application: */
+		/* Macros: */
+			/** TWI slave device address mask for a read session. Mask with a slave device base address to obtain
+			 *  the correct TWI bus address for the slave device when reading data from it.
+			 */
+			#define TWI_ADDRESS_READ         0x00
+
+			/** TWI slave device address mask for a write session. Mask with a slave device base address to obtain
+			 *  the correct TWI bus address for the slave device when writing data to it.
+			 */
+			#define TWI_ADDRESS_WRITE        0x01
+
+			/** Mask to retrieve the base address for a TWI device, which can then be ORed with \ref TWI_ADDRESS_READ
+			 *  or \ref TWI_ADDRESS_WRITE to obtain the device's read and write address respectively.
+			 */
+			#define TWI_DEVICE_ADDRESS_MASK  0xFE
+			
+		/* Enums: */
+			/** Enum for the possible return codes of the TWI transfer start routine and other dependant TWI functions. */
+			enum TWI_ErrorCodes_t
+			{
+				TWI_ERROR_NoError              = 0, /**< Indicates that the command completed sucessfully. */
+				TWI_ERROR_BusFault             = 1, /**< A TWI bus fault occurred while attempting to capture the bus. */
+				TWI_ERROR_BusCaptureTimeout    = 2, /**< A timeout occurred whilst waiting for the bus to be ready. */
+				TWI_ERROR_SlaveResponseTimeout = 3, /**< No ACK received at the nominated slave address within the timeout period. */
+				TWI_ERROR_SlaveNotReady        = 4, /**< Slave NAKed the TWI bus START condition. */
+				TWI_ERROR_SlaveNAK             = 5, /**< Slave NAKed whilst attempting to send data to the device. */
+			};
+	
+		/* Inline Functions: */
+			/** Initialises the TWI hardware into master mode, ready for data transmission and reception. This must be
+			 *  before any other TWI operations.
+			 */
+			static inline void TWI_Init(void) ATTR_ALWAYS_INLINE;
+			static inline void TWI_Init(void)
+			{
+				TWCR |=  (1 << TWEN);
+			}
+
+			/** Turns off the TWI driver hardware. If this is called, any further TWI operations will require a call to
+			 *  \ref TWI_Init() before the TWI can be used again.
+			 */
+			static inline void TWI_Disable(void) ATTR_ALWAYS_INLINE;
+			static inline void TWI_Disable(void)
+			{
+				TWCR &= ~(1 << TWEN);
+			}
+
+			/** Sends a TWI STOP onto the TWI bus, terminating communication with the currently addressed device. */
+			static inline void TWI_StopTransmission(void) ATTR_ALWAYS_INLINE;
+			static inline void TWI_StopTransmission(void)
+			{
+				TWCR = ((1 << TWINT) | (1 << TWSTO) | (1 << TWEN));
+			}
+
+			/** Sends a byte to the currently addressed device on the TWI bus.
+			 *
+			 *  \param[in] Byte  Byte to send to the currently addressed device
+			 *
+			 *  \return Boolean \c true if the recipient ACKed the byte, \c false otherwise
+			 */
+			static inline bool TWI_SendByte(const uint8_t Byte)
+			{
+				TWDR = Byte;
+				TWCR = ((1 << TWINT) | (1 << TWEN));
+				while (!(TWCR & (1 << TWINT)));
+
+				return ((TWSR & TW_STATUS_MASK) == TW_MT_DATA_ACK);
+			}
+
+			/** Receives a byte from the currently addressed device on the TWI bus.
+			 *
+			 *  \param[in] Byte      Location where the read byte is to be stored
+			 *  \param[in] LastByte  Indicates if the byte should be ACKed if false, NAKed if true
+			 *
+			 *  \return Boolean \c true if the byte reception successfully completed, \c false otherwise
+			 */
+			static inline uint8_t TWI_ReceiveByte(uint8_t* const Byte,
+			                                      const bool LastByte)
+			{
+				uint8_t TWCRMask = ((1 << TWINT) | (1 << TWEN));
+
+				if (!(LastByte))
+				  TWCRMask |= (1 << TWEA);
+
+				TWCR = TWCRMask;
+				while (!(TWCR & (1 << TWINT)));
+				*Byte = TWDR;
+
+				return ((TWSR & TW_STATUS_MASK) == TW_MR_DATA_ACK);
+			}
+
+		/* Function Prototypes: */
+			/** Begins a master mode TWI bus communication with the given slave device address.
+			 *
+			 *  \param[in] SlaveAddress  Address of the slave TWI device to communicate with
+			 *  \param[in] TimeoutMS     Timeout period within which the slave must respond, in milliseconds
+			 *
+			 *  \return A value from the \ref TWI_ErrorCodes_t enum
+			 */
+			uint8_t TWI_StartTransmission(const uint8_t SlaveAddress,
+			                              const uint8_t TimeoutMS);
+
+			/** High level function to perform a complete packet transfer over the TWI bus to the specified
+			 *  device.
+			 *
+			 *  \param[in] SlaveAddress        Base address of the TWI slave device to communicate with
+			 *  \param[in] TimeoutMS           Timeout for bus capture and slave START ACK, in milliseconds
+			 *  \param[in] InternalAddress     Pointer to a location where the internal slave read start address is stored
+			 *  \param[in] InternalAddressLen  Size of the internal device address, in bytes
+			 *  \param[in] Buffer              Pointer to a buffer where the read packet data is to be stored
+			 *  \param[in] Length              Size of the packet to read, in bytes
+			 */
+			uint8_t TWI_ReadPacket(const uint8_t SlaveAddress,
+			                       const uint8_t TimeoutMS,
+			                       const uint8_t* InternalAddress,
+			                       uint8_t InternalAddressLen,
+			                       uint8_t* Buffer,
+			                       uint8_t Length);
+
+			/** High level function to perform a complete packet transfer over the TWI bus from the specified
+			 *  device.
+			 *
+			 *  \param[in] SlaveAddress        Base address of the TWI slave device to communicate with
+			 *  \param[in] TimeoutMS           Timeout for bus capture and slave START ACK, in milliseconds
+			 *  \param[in] InternalAddress     Pointer to a location where the internal slave write start address is stored
+			 *  \param[in] InternalAddressLen  Size of the internal device address, in bytes
+			 *  \param[in] Buffer              Pointer to a buffer where the packet data to send is stored
+			 *  \param[in] Length              Size of the packet to send, in bytes
+			 */
+			uint8_t TWI_WritePacket(const uint8_t SlaveAddress,
+			                        const uint8_t TimeoutMS,
+			                        const uint8_t* InternalAddress,
+			                        uint8_t InternalAddressLen,
+			                        const uint8_t* Buffer,
+			                        uint8_t Length);
+
+	/* Disable C linkage for C++ Compilers: */
+		#if defined(__cplusplus)
+			}
+		#endif
+
+#endif
+
+/** @} */
+