Move new Class Driver powered demos to a new ClassDriver subdirectory, re-add old low level demos to a LowLevel subdirectory.

Demos/Device/ClassDriver/AudioOutput/AudioOutput.aps

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+<AVRStudio><MANAGEMENT><ProjectName>AudioOutput</ProjectName><Created>30-Sep-2008 14:03:51</Created><LastEdit>30-Sep-2008 14:04:06</LastEdit><ICON>241</ICON><ProjectType>0</ProjectType><Created>30-Sep-2008 14:03:51</Created><Version>4</Version><Build>4, 14, 0, 589</Build><ProjectTypeName>AVR GCC</ProjectTypeName></MANAGEMENT><CODE_CREATION><ObjectFile></ObjectFile><EntryFile></EntryFile><SaveFolder>C:\Users\Dean\Documents\Electronics\Projects\WORK\MyUSBWORK\Demos\AudioOutput\</SaveFolder></CODE_CREATION><DEBUG_TARGET><CURRENT_TARGET></CURRENT_TARGET><CURRENT_PART></CURRENT_PART><BREAKPOINTS></BREAKPOINTS><IO_EXPAND><HIDE>false</HIDE></IO_EXPAND><REGISTERNAMES><Register>R00</Register><Register>R01</Register><Register>R02</Register><Register>R03</Register><Register>R04</Register><Register>R05</Register><Register>R06</Register><Register>R07</Register><Register>R08</Register><Register>R09</Register><Register>R10</Register><Register>R11</Register><Register>R12</Register><Register>R13</Register><Register>R14</Register><Register>R15</Register><Register>R16</Register><Register>R17</Register><Register>R18</Register><Register>R19</Register><Register>R20</Register><Register>R21</Register><Register>R22</Register><Register>R23</Register><Register>R24</Register><Register>R25</Register><Register>R26</Register><Register>R27</Register><Register>R28</Register><Register>R29</Register><Register>R30</Register><Register>R31</Register></REGISTERNAMES><COM></COM><COMType>0</COMType><WATCHNUM>0</WATCHNUM><WATCHNAMES><Pane0></Pane0><Pane1></Pane1><Pane2></Pane2><Pane3></Pane3></WATCHNAMES><BreakOnTrcaeFull>0</BreakOnTrcaeFull></DEBUG_TARGET><Debugger><Triggers></Triggers></Debugger><AVRGCCPLUGIN><FILES><SOURCEFILE>AudioOutput.c</SOURCEFILE><SOURCEFILE>Descriptors.c</SOURCEFILE><HEADERFILE>AudioOutput.h</HEADERFILE><HEADERFILE>Descriptors.h</HEADERFILE><OTHERFILE>makefile</OTHERFILE></FILES><CONFIGS><CONFIG><NAME>default</NAME><USESEXTERNALMAKEFILE>YES</USESEXTERNALMAKEFILE><EXTERNALMAKEFILE>makefile</EXTERNALMAKEFILE><PART>atmega128</PART><HEX>1</HEX><LIST>1</LIST><MAP>1</MAP><OUTPUTFILENAME>AudioOutput.elf</OUTPUTFILENAME><OUTPUTDIR>default\</OUTPUTDIR><ISDIRTY>1</ISDIRTY><OPTIONS/><INCDIRS/><LIBDIRS/><LIBS/><LINKOBJECTS/><OPTIONSFORALL>-Wall -gdwarf-2 -std=gnu99 -Os -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums</OPTIONSFORALL><LINKEROPTIONS></LINKEROPTIONS><SEGMENTS/></CONFIG></CONFIGS><LASTCONFIG>default</LASTCONFIG><USES_WINAVR>1</USES_WINAVR><GCC_LOC>C:\WinAVR-20080512\bin\avr-gcc.exe</GCC_LOC><MAKE_LOC>C:\WinAVR-20080512\utils\bin\make.exe</MAKE_LOC></AVRGCCPLUGIN><IOView><usergroups/><sort sorted="0" column="0" ordername="0" orderaddress="0" ordergroup="0"/></IOView><Files></Files><Events><Bookmarks></Bookmarks></Events><Trace><Filters></Filters></Trace></AVRStudio>

Demos/Device/ClassDriver/AudioOutput/AudioOutput.c

@@ -0,0 +1,206 @@
+/*
+             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
+ *
+ *  Main source file for the AudioOutput demo. This file contains the main tasks of
+ *  the demo and is responsible for the initial application hardware configuration.
+ */
+
+#include "AudioOutput.h"
+
+/** LUFA Audio Class driver interface configuration and state information. This structure is
+ *  passed to all Audio Class driver functions, so that multiple instances of the same class
+ *  within a device can be differentiated from one another.
+ */
+USB_ClassInfo_Audio_t Speaker_Audio_Interface =
+	{
+		.StreamingInterfaceNumber = 1,
+
+		.DataOUTEndpointNumber    = AUDIO_STREAM_EPNUM,
+		.DataOUTEndpointSize      = AUDIO_STREAM_EPSIZE,
+	};
+
+/** Main program entry point. This routine contains the overall program flow, including initial
+ *  setup of all components and the main program loop.
+ */
+int main(void)
+{
+	SetupHardware();
+
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+	
+	for (;;)
+	{
+		if (Speaker_Audio_Interface.InterfaceEnabled)
+		  ProcessNextSample();
+
+		USB_Audio_USBTask(&Speaker_Audio_Interface);
+		USB_USBTask();
+	}
+}
+
+/** Configures the board hardware and chip peripherals for the demo's functionality. */
+void SetupHardware(void)
+{
+	/* Disable watchdog if enabled by bootloader/fuses */
+	MCUSR &= ~(1 << WDRF);
+	wdt_disable();
+
+	/* Disable clock division */
+	clock_prescale_set(clock_div_1);
+
+	/* Hardware Initialization */
+	LEDs_Init();
+	USB_Init();
+}
+
+/** Processes the next audio sample by reading the last ADC conversion and writing it to the audio
+ *  interface, each time the sample reload timer period elapses to give a constant sample rate.
+ */
+void ProcessNextSample(void)
+{
+	if ((TIFR0 & (1 << OCF0A)) && USB_Audio_IsSampleReceived(&Speaker_Audio_Interface))
+	{
+		/* Clear the sample reload timer */
+		TIFR0 |= (1 << OCF0A);
+
+		/* Retrieve the signed 16-bit left and right audio samples */
+		int16_t LeftSample_16Bit  = (int16_t)USB_Audio_ReadSample16();
+		int16_t RightSample_16Bit = (int16_t)USB_Audio_ReadSample16();
+
+		/* Massage signed 16-bit left and right audio samples into signed 8-bit */
+		int8_t  LeftSample_8Bit   = (LeftSample_16Bit  >> 8);
+		int8_t  RightSample_8Bit  = (RightSample_16Bit >> 8);
+			
+		/* Mix the two channels together to produce a mono, 8-bit sample */
+		int8_t  MixedSample_8Bit  = (((int16_t)LeftSample_8Bit + (int16_t)RightSample_8Bit) >> 1);
+
+#if defined(AUDIO_OUT_MONO)
+		/* Load the sample into the PWM timer channel */
+		OCRxA = ((uint8_t)MixedSample_8Bit ^ (1 << 7));
+#elif defined(AUDIO_OUT_STEREO)
+		/* Load the dual 8-bit samples into the PWM timer channels */
+		OCRxA = ((uint8_t)LeftSample_8Bit  ^ (1 << 7));
+		OCRxB = ((uint8_t)RightSample_8Bit ^ (1 << 7));
+#elif defined(AUDIO_OUT_PORTC)
+		PORTC = MixedSample_8Bit;
+#else
+		uint8_t LEDMask = LEDS_NO_LEDS;
+
+		/* Make mixed sample value positive (absolute) */
+		if (MixedSample_8Bit < 0)
+		  MixedSample_8Bit = -MixedSample_8Bit;
+
+		if (MixedSample_8Bit > ((128 / 8) * 1))
+		  LEDMask |= LEDS_LED1;
+		  
+		if (MixedSample_8Bit > ((128 / 8) * 2))
+		  LEDMask |= LEDS_LED2;
+		  
+		if (MixedSample_8Bit > ((128 / 8) * 3))
+		  LEDMask |= LEDS_LED3;
+
+		if (MixedSample_8Bit > ((128 / 8) * 4))
+		  LEDMask |= LEDS_LED4;
+
+		LEDs_SetAllLEDs(LEDMask);
+#endif
+	}
+}
+
+/** Event handler for the library USB Connection event. */
+void EVENT_USB_Connect(void)
+{
+	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
+	
+	/* Sample reload timer initialization */
+	OCR0A   = (F_CPU / AUDIO_SAMPLE_FREQUENCY) - 1;
+	TCCR0A  = (1 << WGM01);  // CTC mode
+	TCCR0B  = (1 << CS00);   // Fcpu speed
+
+#if defined(AUDIO_OUT_MONO)
+	/* Set speaker as output */
+	DDRC   |= (1 << 6);
+#elif defined(AUDIO_OUT_STEREO)
+	/* Set speakers as outputs */
+	DDRC   |= ((1 << 6) | (1 << 5));
+#elif defined(AUDIO_OUT_PORTC)
+	/* Set PORTC as outputs */
+	DDRC   |= 0xFF;
+#endif
+
+#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))
+	/* PWM speaker timer initialization */
+	TCCRxA  = ((1 << WGMx0) | (1 << COMxA1) | (1 << COMxA0)
+							| (1 << COMxB1) | (1 << COMxB0)); // Set on match, clear on TOP
+	TCCRxB  = ((1 << WGMx2) | (1 << CSx0));  // Fast 8-Bit PWM, Fcpu speed
+#endif	
+}
+
+/** Event handler for the library USB Disconnection event. */
+void EVENT_USB_Disconnect(void)
+{
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+
+	/* Stop the sample reload timer */
+	TCCR0B = 0;
+
+#if (defined(AUDIO_OUT_MONO) || defined(AUDIO_OUT_STEREO))
+	/* Stop the PWM generation timer */
+	TCCRxB = 0;
+#endif		
+
+#if defined(AUDIO_OUT_MONO)
+	/* Set speaker as input to reduce current draw */
+	DDRC   &= ~(1 << 6);
+#elif defined(AUDIO_OUT_STEREO)
+	/* Set speakers as inputs to reduce current draw */
+	DDRC   &= ~((1 << 6) | (1 << 5));
+#elif defined(AUDIO_OUT_PORTC)
+	/* Set PORTC low */
+	PORTC  = 0x00;
+#endif
+}
+
+/** Event handler for the library USB Configuration Changed event. */
+void EVENT_USB_ConfigurationChanged(void)
+{
+	LEDs_SetAllLEDs(LEDMASK_USB_READY);
+	
+	if (!(USB_Audio_ConfigureEndpoints(&Speaker_Audio_Interface)))
+	  LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+}
+
+/** Event handler for the library USB Unhandled Control Packet event. */
+void EVENT_USB_UnhandledControlPacket(void)
+{
+	USB_Audio_ProcessControlPacket(&Speaker_Audio_Interface);
+}

Demos/Device/ClassDriver/AudioOutput/AudioOutput.h

@@ -0,0 +1,123 @@
+/*
+             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
+ *
+ *  Header file for AudioOutput.c.
+ */
+
+#ifndef _AUDIO_OUTPUT_H_
+#define _AUDIO_OUTPUT_H_
+
+	/* Includes: */
+		#include <avr/io.h>
+		#include <avr/wdt.h>
+		#include <avr/power.h>
+
+		#include "Descriptors.h"
+		
+		#include <LUFA/Version.h>
+		#include <LUFA/Drivers/Board/LEDs.h>
+		#include <LUFA/Drivers/Board/Joystick.h>
+		#include <LUFA/Drivers/Peripheral/ADC.h>
+		#include <LUFA/Drivers/USB/USB.h>
+		#include <LUFA/Drivers/USB/Class/Device/Audio.h>
+	
+	/* Macros: */
+		#if defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER)
+			#define TCCRxA          TCCR3A
+			#define TCCRxB          TCCR3B
+			#define OCRxA           OCR3A
+			#define OCRxB           OCR3B
+			#define WGMx0           WGM30
+			#define WGMx2           WGM32
+			#define COMxA1          COM3A1
+			#define COMxA0          COM3A0
+			#define COMxB1          COM3B1
+			#define COMxB0          COM3B0
+			#define CSx0            CS30
+		#else
+			/** Timer count register used for left channel PWM audio output (or mixed output in mono output mode) */
+			#define TCCRxA          TCCR1A
+
+			/** Timer count register used for right channel PWM audio output */
+			#define TCCRxB          TCCR1B
+
+			/** Timer compare register used for left channel PWM audio output (or mixed output in mono output mode) */
+			#define OCRxA           OCR1A
+
+			/** Timer compare register used for right channel PWM audio output */
+			#define OCRxB           OCR1B
+
+			/** Timer control register mask used to select PWM mode */
+			#define WGMx0           WGM10
+
+			/** Timer control register mask used to select PWM mode */
+			#define WGMx2           WGM12
+
+			/** Timer control register mask used to set, clear or toggle channel output pin on match */
+			#define COMxA1          COM1A1
+
+			/** Timer control register mask used to set, clear or toggle channel output pin on match */
+			#define COMxA0          COM1A0
+
+			/** Timer control register mask used to set, clear or toggle channel output pin on match */
+			#define COMxB1          COM1B1
+
+			/** Timer control register mask used to set, clear or toggle channel output pin on match */
+			#define COMxB0          COM1B0
+
+			/** Timer control register mask used to start the timer at Fcpu clock rate */
+			#define CSx0            CS10
+		#endif
+		
+	/* Macros: */
+		/** LED mask for the library LED driver, to indicate that the USB interface is not ready. */
+		#define LEDMASK_USB_NOTREADY      LEDS_LED1
+
+		/** LED mask for the library LED driver, to indicate that the USB interface is enumerating. */
+		#define LEDMASK_USB_ENUMERATING  (LEDS_LED2 | LEDS_LED3)
+
+		/** LED mask for the library LED driver, to indicate that the USB interface is ready. */
+		#define LEDMASK_USB_READY        (LEDS_LED2 | LEDS_LED4)
+
+		/** LED mask for the library LED driver, to indicate that an error has occurred in the USB interface. */
+		#define LEDMASK_USB_ERROR        (LEDS_LED1 | LEDS_LED3)
+		
+	/* Function Prototypes: */
+		void SetupHardware(void);
+		void ProcessNextSample(void);
+		
+		void EVENT_USB_Connect(void);
+		void EVENT_USB_Disconnect(void);
+		void EVENT_USB_ConfigurationChanged(void);
+		void EVENT_USB_UnhandledControlPacket(void);
+
+#endif

Demos/Device/ClassDriver/AudioOutput/AudioOutput.txt

@@ -0,0 +1,93 @@
+/** \file
+ *
+ *  This file contains special DoxyGen information for the generation of the main page and other special
+ *  documentation pages. It is not a project source file.
+ */
+ 
+/** \mainpage Audio Output Device Demo
+ *
+ *  \section SSec_Info USB Information:
+ *
+ *  The following table gives a rundown of the USB utilization of this demo.
+ *
+ *  <table>
+ *   <tr>
+ *    <td><b>USB Mode:</b></td>
+ *    <td>Device</td>
+ *   </tr>
+ *   <tr>
+ *    <td><b>USB Class:</b></td>
+ *    <td>Audio Class</td>
+ *   </tr>
+ *   <tr> 
+ *    <td><b>USB Subclass:</b></td>
+ *    <td>Standard Audio Device</td>
+ *   </tr>
+ *   <tr>
+ *    <td><b>Relevant Standards:</b></td>
+ *    <td>USBIF Audio Class Specification</td>
+ *    <td>USBIF Audio Class Terminal Types Specification</td>
+ *    <td>USBIF Audio Data Formats Specification</td>
+ *   </tr>
+ *   <tr>
+ *    <td><b>Usable Speeds:</b></td>
+ *    <td>Full Speed Mode</td>
+ *   </tr>
+ *  </table>
+ *
+ *  \section SSec_Description Project Description: 
+ *
+ *  Audio demonstration application. This gives a simple reference
+ *  application for implementing a USB Audio Output device using the
+ *  basic USB Audio drivers in all modern OSes (i.e. no special drivers
+ *  required).
+ *  
+ *  On start-up the system will automatically enumerate and function
+ *  as a USB speaker. Incoming audio will output in 8-bit PWM onto
+ *  the timer output (timer 3 for the AT90USBXXX6/7 USB AVRs, timer 1 for
+ *  the AT90USBXXX2 controller AVRs) compare channel A for AUDIO_OUT_MONO
+ *  mode, on channels A and B for AUDIO_OUT_STEREO and on the board LEDs
+ *  for AUDIO_OUT_LEDS mode. Decouple audio outputs with a capacitor and
+ *  attach to a speaker to hear the audio.
+ *  
+ *  Under Windows, if a driver request dialogue pops up, select the option
+ *  to automatically install the appropriate drivers.
+ *
+ *  \section SSec_Options Project Options
+ *
+ *  The following defines can be found in this demo, which can control the demo behaviour when defined, or changed in value.
+ *
+ *  <table>
+ *   <tr>
+ *    <td><b>Define Name:</b></td>
+ *    <td><b>Location:</b></td>
+ *    <td><b>Description:</b></td>
+ *   </tr>
+ *   <tr>
+ *    <td>AUDIO_OUT_STEREO</td>
+ *    <td>Makefile CDEFS</td>
+ *    <td>When defined, this outputs the audio samples in stereo to the timer output pins of the microcontroller.</td>
+ *   </tr>
+ *   <tr>
+ *    <td>AUDIO_OUT_MONO</td>
+ *    <td>Makefile CDEFS</td>
+ *    <td>When defined, this outputs the audio samples in mono to the timer output pin of the microcontroller.</td>
+ *   </tr>
+ *   <tr>
+ *    <td>AUDIO_OUT_LEDS</td>
+ *    <td>Makefile CDEFS</td>
+ *    <td>When defined, this outputs the audio samples in stereo to the board LEDs.</td>
+ *   </tr>
+ *   <tr>
+ *    <td>AUDIO_OUT_PORTC</td>
+ *    <td>Makefile CDEFS</td>
+ *    <td>When defined, this outputs the audio samples in mono to port C of the microcontroller, for connection to an
+ *        external DAC.</td>
+ *   </tr>
+ *   <tr>
+ *    <td>AUDIO_SAMPLE_FREQUENCY</td>
+ *    <td>Descriptors.h</td>
+ *    <td>Gives the audio sample rate per channel for the audio stream, in Hz.</td>
+ *   </tr>
+ *  </table>
+ */

Demos/Device/ClassDriver/AudioOutput/Descriptors.c

@@ -0,0 +1,314 @@
+/*
+             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
+ *
+ *  USB Device Descriptors, for library use when in USB device mode. Descriptors are special 
+ *  computer-readable structures which the host requests upon device enumeration, to determine
+ *  the device's capabilities and functions.  
+ */
+ 
+#include "Descriptors.h"
+
+/** Device descriptor structure. This descriptor, located in FLASH memory, describes the overall
+ *  device characteristics, including the supported USB version, control endpoint size and the
+ *  number of device configurations. The descriptor is read out by the USB host when the enumeration
+ *  process begins.
+ */
+USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+{
+	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
+		
+	.USBSpecification       = VERSION_BCD(02.00),
+	.Class                  = 0x00,
+	.SubClass               = 0x00,
+	.Protocol               = 0x00,
+				
+	.Endpoint0Size          = FIXED_CONTROL_ENDPOINT_SIZE,
+		
+	.VendorID               = 0x03EB,
+	.ProductID              = 0x2046,
+	.ReleaseNumber          = 0x0000,
+		
+	.ManufacturerStrIndex   = 0x01,
+	.ProductStrIndex        = 0x02,
+	.SerialNumStrIndex      = NO_DESCRIPTOR,
+		
+	.NumberOfConfigurations = 1
+};
+
+/** Configuration descriptor structure. This descriptor, located in FLASH memory, describes the usage
+ *  of the device in one of its supported configurations, including information about any device interfaces
+ *  and endpoints. The descriptor is read out by the USB host during the enumeration process when selecting
+ *  a configuration so that the host may correctly communicate with the USB device.
+ */
+USB_Descriptor_Configuration_t PROGMEM ConfigurationDescriptor =
+{
+	.Config = 
+		{
+			.Header                   = {.Size = sizeof(USB_Descriptor_Configuration_Header_t), .Type = DTYPE_Configuration},
+
+			.TotalConfigurationSize   = sizeof(USB_Descriptor_Configuration_t),
+			.TotalInterfaces          = 2,
+
+			.ConfigurationNumber      = 1,
+			.ConfigurationStrIndex    = NO_DESCRIPTOR,
+				
+			.ConfigAttributes         = (USB_CONFIG_ATTR_BUSPOWERED | USB_CONFIG_ATTR_SELFPOWERED),
+			
+			.MaxPowerConsumption      = USB_CONFIG_POWER_MA(100)
+		},
+		
+	.AudioControlInterface = 
+		{
+			.Header                   = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
+
+			.InterfaceNumber          = 0,
+			.AlternateSetting         = 0,
+			
+			.TotalEndpoints           = 0,
+				
+			.Class                    = 0x01,
+			.SubClass                 = 0x01,
+			.Protocol                 = 0x00,
+				
+			.InterfaceStrIndex        = NO_DESCRIPTOR			
+		},
+	
+	.AudioControlInterface_SPC = 
+		{
+			.Header                   = {.Size = sizeof(USB_AudioInterface_AC_t), .Type = DTYPE_AudioInterface},
+			.Subtype                  = DSUBTYPE_Header,
+			
+			.ACSpecification          = VERSION_BCD(01.00),
+			.TotalLength              = (sizeof(USB_AudioInterface_AC_t) +
+			                           sizeof(USB_AudioInputTerminal_t) +
+									   sizeof(USB_AudioOutputTerminal_t)),
+			
+			.InCollection             = 1,
+			.InterfaceNumbers         = {1},			
+		},
+
+	.InputTerminal = 
+		{
+			.Header                   = {.Size = sizeof(USB_AudioInputTerminal_t), .Type = DTYPE_AudioInterface},
+			.Subtype                  = DSUBTYPE_InputTerminal,
+		
+			.TerminalID               = 0x01,
+			.TerminalType             = TERMINAL_STREAMING,
+			.AssociatedOutputTerminal = 0x00,
+			
+			.TotalChannels            = 2,
+			.ChannelConfig            = (CHANNEL_LEFT_FRONT | CHANNEL_RIGHT_FRONT),
+			
+			.ChannelStrIndex          = NO_DESCRIPTOR,
+			.TerminalStrIndex         = NO_DESCRIPTOR
+		},
+
+	.OutputTerminal = 
+		{
+			.Header                   = {.Size = sizeof(USB_AudioOutputTerminal_t), .Type = DTYPE_AudioInterface},
+			.Subtype                  = DSUBTYPE_OutputTerminal,
+		
+			.TerminalID               = 0x02,
+			.TerminalType             = TERMINAL_OUT_SPEAKER,
+			.AssociatedInputTerminal  = 0x00,
+			
+			.SourceID                 = 0x01,
+			
+			.TerminalStrIndex         = NO_DESCRIPTOR			
+		},
+
+	.AudioStreamInterface_Alt0 = 
+		{
+			.Header                   = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
+
+			.InterfaceNumber          = 1,
+			.AlternateSetting         = 0,
+			
+			.TotalEndpoints           = 0,
+				
+			.Class                    = 0x01,
+			.SubClass                 = 0x02,
+			.Protocol                 = 0x00,
+				
+			.InterfaceStrIndex        = NO_DESCRIPTOR
+		},
+
+	.AudioStreamInterface_Alt1 = 
+		{
+			.Header                   = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
+
+			.InterfaceNumber          = 1,
+			.AlternateSetting         = 1,
+			
+			.TotalEndpoints           = 1,
+				
+			.Class                    = 0x01,
+			.SubClass                 = 0x02,
+			.Protocol                 = 0x00,
+				
+			.InterfaceStrIndex        = NO_DESCRIPTOR
+		},
+		
+	.AudioStreamInterface_SPC = 
+		{
+			.Header                   = {.Size = sizeof(USB_AudioInterface_AS_t), .Type = DTYPE_AudioInterface},
+			.Subtype                  = DSUBTYPE_General,
+			
+			.TerminalLink             = 0x01,
+			
+			.FrameDelay               = 1,
+			.AudioFormat              = 0x0001
+		},
+		
+	.AudioFormat = 
+		{
+			.Header                   = {.Size = sizeof(USB_AudioFormat_t), .Type = DTYPE_AudioInterface},
+			.Subtype                  = DSUBTYPE_Format,
+
+			.FormatType               = 0x01,
+			.Channels                 = 0x02,
+			
+			.SubFrameSize             = 0x02,
+			.BitResolution            = 16,
+
+			.SampleFrequencyType      = (sizeof(ConfigurationDescriptor.AudioFormat.SampleFrequencies) / sizeof(AudioSampleFreq_t)),		
+			.SampleFrequencies        = {AUDIO_SAMPLE_FREQ(AUDIO_SAMPLE_FREQUENCY)}
+		},
+	
+	.AudioEndpoint = 
+		{
+			.Endpoint = 
+				{
+					.Header              = {.Size = sizeof(USB_AudioStreamEndpoint_Std_t), .Type = DTYPE_Endpoint},
+
+					.EndpointAddress     = (ENDPOINT_DESCRIPTOR_DIR_OUT | AUDIO_STREAM_EPNUM),
+					.Attributes          = (EP_TYPE_ISOCHRONOUS | ENDPOINT_ATTR_SYNC | ENDPOINT_USAGE_DATA),
+					.EndpointSize        = AUDIO_STREAM_EPSIZE,
+					.PollingIntervalMS   = 1
+				},
+			
+			.Refresh                  = 0,
+			.SyncEndpointNumber       = 0
+		},
+		
+	.AudioEndpoint_SPC = 
+		{
+			.Header                   = {.Size = sizeof(USB_AudioStreamEndpoint_Spc_t), .Type = DTYPE_AudioEndpoint},
+			.Subtype                  = DSUBTYPE_General,
+			
+			.Attributes               = EP_ACCEPTS_SMALL_PACKETS,
+			
+			.LockDelayUnits           = 0x00,
+			.LockDelay                = 0x0000
+		}
+};
+
+/** Language descriptor structure. This descriptor, located in FLASH memory, is returned when the host requests
+ *  the string descriptor with index 0 (the first index). It is actually an array of 16-bit integers, which indicate
+ *  via the language ID table available at USB.org what languages the device supports for its string descriptors.
+ */
+USB_Descriptor_String_t PROGMEM LanguageString =
+{
+	.Header                 = {.Size = USB_STRING_LEN(1), .Type = DTYPE_String},
+		
+	.UnicodeString          = {LANGUAGE_ID_ENG}
+};
+
+/** Manufacturer descriptor string. This is a Unicode string containing the manufacturer's details in human readable
+ *  form, and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
+ *  Descriptor.
+ */
+USB_Descriptor_String_t PROGMEM ManufacturerString =
+{
+	.Header                 = {.Size = USB_STRING_LEN(11), .Type = DTYPE_String},
+		
+	.UnicodeString          = L"Dean Camera"
+};
+
+/** Product descriptor string. This is a Unicode string containing the product's details in human readable form,
+ *  and is read out upon request by the host when the appropriate string ID is requested, listed in the Device
+ *  Descriptor.
+ */
+USB_Descriptor_String_t PROGMEM ProductString =
+{
+	.Header                 = {.Size = USB_STRING_LEN(19), .Type = DTYPE_String},
+		
+	.UnicodeString          = L"LUFA Audio Out Demo"
+};
+
+/** This function is called by the library when in device mode, and must be overridden (see library "USB Descriptors"
+ *  documentation) by the application code so that the address and size of a requested descriptor can be given
+ *  to the USB library. When the device receives a Get Descriptor request on the control endpoint, this function
+ *  is called so that the descriptor details can be passed back and the appropriate descriptor sent back to the
+ *  USB host.
+ */
+uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue, const uint8_t wIndex, void** const DescriptorAddress)
+{
+	const uint8_t  DescriptorType   = (wValue >> 8);
+	const uint8_t  DescriptorNumber = (wValue & 0xFF);
+
+	void*    Address = NULL;
+	uint16_t Size    = NO_DESCRIPTOR;
+
+	switch (DescriptorType)
+	{
+		case DTYPE_Device:
+			Address = (void*)&DeviceDescriptor;
+			Size    = sizeof(USB_Descriptor_Device_t);
+			break;
+		case DTYPE_Configuration:
+			Address = (void*)&ConfigurationDescriptor;
+			Size    = sizeof(USB_Descriptor_Configuration_t);
+			break;
+		case DTYPE_String: 
+			switch (DescriptorNumber)
+			{
+				case 0x00:
+					Address = (void*)&LanguageString;
+					Size    = pgm_read_byte(&LanguageString.Header.Size);
+					break;
+				case 0x01: 
+					Address = (void*)&ManufacturerString;
+					Size    = pgm_read_byte(&ManufacturerString.Header.Size);
+					break;
+				case 0x02: 
+					Address = (void*)&ProductString;
+					Size    = pgm_read_byte(&ProductString.Header.Size);
+					break;
+			}
+			
+			break;
+	}
+	
+	*DescriptorAddress = Address;
+	return Size;
+}

Demos/Device/ClassDriver/AudioOutput/Descriptors.h

@@ -0,0 +1,86 @@
+/*
+             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
+ *
+ *  Header file for Descriptors.c.
+ */
+ 
+#ifndef _DESCRIPTORS_H_
+#define _DESCRIPTORS_H_
+
+	/* Includes: */
+		#include <LUFA/Drivers/USB/USB.h>
+		#include <LUFA/Drivers/USB/Class/Device/Audio.h>
+
+		#include <avr/pgmspace.h>
+
+	/* Macros: */
+		#if defined(USB_FULL_CONTROLLER) || defined(__DOXYGEN__)
+			/** Endpoint number of the Audio isochronous streaming data endpoint. */
+			#define AUDIO_STREAM_EPNUM       1
+		#else
+			#define AUDIO_STREAM_EPNUM       3		
+		#endif
+		
+		/** Endpoint size in bytes of the Audio isochronous streaming data endpoint. The Windows audio stack requires
+		 *  at least 192 bytes for correct output, thus the smaller 128 byte maximum endpoint size on some of the smaller
+		 *  USB AVR models will result in unavoidable distorted output.
+		 */
+		#define AUDIO_STREAM_EPSIZE          ENDPOINT_MAX_SIZE(AUDIO_STREAM_EPNUM)
+		
+		/** Sample frequency of the data being transmitted through the streaming endpoint. */
+		#define AUDIO_SAMPLE_FREQUENCY       48000
+		
+	/* Type Defines: */
+		/** Type define for the device configuration descriptor structure. This must be defined in the
+		 *  application code, as the configuration descriptor contains several sub-descriptors which
+		 *  vary between devices, and which describe the device's usage to the host.
+		 */
+		typedef struct
+		{
+			USB_Descriptor_Configuration_Header_t Config;
+			USB_Descriptor_Interface_t            AudioControlInterface;
+			USB_AudioInterface_AC_t               AudioControlInterface_SPC;
+			USB_AudioInputTerminal_t              InputTerminal;
+			USB_AudioOutputTerminal_t             OutputTerminal;
+			USB_Descriptor_Interface_t            AudioStreamInterface_Alt0;
+			USB_Descriptor_Interface_t            AudioStreamInterface_Alt1;
+			USB_AudioInterface_AS_t               AudioStreamInterface_SPC;
+			USB_AudioFormat_t                     AudioFormat;
+			USB_AudioStreamEndpoint_Std_t         AudioEndpoint;
+			USB_AudioStreamEndpoint_Spc_t         AudioEndpoint_SPC;
+		} USB_Descriptor_Configuration_t;
+		
+	/* Function Prototypes: */
+		uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue, const uint8_t wIndex, void** const DescriptorAddress)
+											ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(3);
+
+#endif

Demos/Device/ClassDriver/AudioOutput/makefile

@@ -0,0 +1,733 @@
+# Hey Emacs, this is a -*- makefile -*-
+#----------------------------------------------------------------------------
+# WinAVR Makefile Template written by Eric B. Weddington, Jörg Wunsch, et al.
+#  >> Modified for use with the LUFA project. <<
+#
+# Released to the Public Domain
+#
+# Additional material for this makefile was written by:
+# Peter Fleury
+# Tim Henigan
+# Colin O'Flynn
+# Reiner Patommel
+# Markus Pfaff
+# Sander Pool
+# Frederik Rouleau
+# Carlos Lamas
+# Dean Camera
+# Opendous Inc.
+# Denver Gingerich
+#
+#----------------------------------------------------------------------------
+# On command line:
+#
+# make all = Make software.
+#
+# make clean = Clean out built project files.
+#
+# make coff = Convert ELF to AVR COFF.
+#
+# make extcoff = Convert ELF to AVR Extended COFF.
+#
+# make program = Download the hex file to the device, using avrdude.
+#                Please customize the avrdude settings below first!
+#
+# make dfu = Download the hex file to the device, using dfu-programmer (must
+#            have dfu-programmer installed).
+#
+# make flip = Download the hex file to the device, using Atmel FLIP (must
+#             have Atmel FLIP installed).
+#
+# make dfu-ee = Download the eeprom file to the device, using dfu-programmer
+#               (must have dfu-programmer installed).
+#
+# make flip-ee = Download the eeprom file to the device, using Atmel FLIP
+#                (must have Atmel FLIP installed).
+#
+# make doxygen = Generate DoxyGen documentation for the project (must have
+#                DoxyGen installed)
+#
+# make debug = Start either simulavr or avarice as specified for debugging, 
+#              with avr-gdb or avr-insight as the front end for debugging.
+#
+# make filename.s = Just compile filename.c into the assembler code only.
+#
+# make filename.i = Create a preprocessed source file for use in submitting
+#                   bug reports to the GCC project.
+#
+# To rebuild project do "make clean" then "make all".
+#----------------------------------------------------------------------------
+
+
+# MCU name
+MCU = at90usb1287
+
+
+# Target board (see library "Board Types" documentation, USER or blank for projects not requiring
+# LUFA board drivers). If USER is selected, put custom board drivers in a directory called 
+# "Board" inside the application directory.
+BOARD  = USBKEY
+
+
+# Processor frequency.
+#     This will define a symbol, F_CPU, in all source code files equal to the 
+#     processor frequency. You can then use this symbol in your source code to 
+#     calculate timings. Do NOT tack on a 'UL' at the end, this will be done
+#     automatically to create a 32-bit value in your source code.
+#     Typical values are:
+#         F_CPU =  1000000
+#         F_CPU =  1843200
+#         F_CPU =  2000000
+#         F_CPU =  3686400
+#         F_CPU =  4000000
+#         F_CPU =  7372800
+#         F_CPU =  8000000
+#         F_CPU = 11059200
+#         F_CPU = 14745600
+#         F_CPU = 16000000
+#         F_CPU = 18432000
+#         F_CPU = 20000000
+F_CPU = 8000000
+
+
+# Input clock frequency.
+#     This will define a symbol, F_CLOCK, in all source code files equal to the 
+#     input clock frequency (before any prescaling is performed). This value may
+#     differ from F_CPU if prescaling is used on the latter, and is required as the
+#     raw input clock is fed directly to the PLL sections of the AVR for high speed
+#     clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'
+#     at the end, this will be done automatically to create a 32-bit value in your
+#     source code.
+#
+#     If no clock division is performed on the input clock inside the AVR (via the
+#     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
+F_CLOCK = 8000000
+
+
+# Output format. (can be srec, ihex, binary)
+FORMAT = ihex
+
+
+# Target file name (without extension).
+TARGET = AudioOutput
+
+
+# Object files directory
+#     To put object files in current directory, use a dot (.), do NOT make
+#     this an empty or blank macro!
+OBJDIR = .
+
+
+# Path to the LUFA library
+LUFA_PATH = ../../..
+
+
+# List C source files here. (C dependencies are automatically generated.)
+SRC = $(TARGET).c                                                 \
+	  Descriptors.c                                               \
+	  $(LUFA_PATH)/LUFA/Drivers/USB/LowLevel/DevChapter9.c        \
+	  $(LUFA_PATH)/LUFA/Drivers/USB/LowLevel/Endpoint.c           \
+	  $(LUFA_PATH)/LUFA/Drivers/USB/LowLevel/Host.c               \
+	  $(LUFA_PATH)/LUFA/Drivers/USB/LowLevel/HostChapter9.c       \
+	  $(LUFA_PATH)/LUFA/Drivers/USB/LowLevel/LowLevel.c           \
+ 	  $(LUFA_PATH)/LUFA/Drivers/USB/LowLevel/Pipe.c               \
+	  $(LUFA_PATH)/LUFA/Drivers/USB/HighLevel/Events.c            \
+	  $(LUFA_PATH)/LUFA/Drivers/USB/HighLevel/USBInterrupt.c      \
+	  $(LUFA_PATH)/LUFA/Drivers/USB/HighLevel/USBTask.c           \
+	  $(LUFA_PATH)/LUFA/Drivers/USB/HighLevel/ConfigDescriptor.c  \
+	  $(LUFA_PATH)/LUFA/Drivers/USB/Class/Device/Audio.c          \
+
+
+# List C++ source files here. (C dependencies are automatically generated.)
+CPPSRC = 
+
+
+# List Assembler source files here.
+#     Make them always end in a capital .S.  Files ending in a lowercase .s
+#     will not be considered source files but generated files (assembler
+#     output from the compiler), and will be deleted upon "make clean"!
+#     Even though the DOS/Win* filesystem matches both .s and .S the same,
+#     it will preserve the spelling of the filenames, and gcc itself does
+#     care about how the name is spelled on its command-line.
+ASRC =
+
+
+# Optimization level, can be [0, 1, 2, 3, s]. 
+#     0 = turn off optimization. s = optimize for size.
+#     (Note: 3 is not always the best optimization level. See avr-libc FAQ.)
+OPT = s
+
+
+# Debugging format.
+#     Native formats for AVR-GCC's -g are dwarf-2 [default] or stabs.
+#     AVR Studio 4.10 requires dwarf-2.
+#     AVR [Extended] COFF format requires stabs, plus an avr-objcopy run.
+DEBUG = dwarf-2
+
+
+# List any extra directories to look for include files here.
+#     Each directory must be seperated by a space.
+#     Use forward slashes for directory separators.
+#     For a directory that has spaces, enclose it in quotes.
+EXTRAINCDIRS = $(LUFA_PATH)/
+
+
+# Compiler flag to set the C Standard level.
+#     c89   = "ANSI" C
+#     gnu89 = c89 plus GCC extensions
+#     c99   = ISO C99 standard (not yet fully implemented)
+#     gnu99 = c99 plus GCC extensions
+CSTANDARD = -std=gnu99
+
+
+# Place -D or -U options here for C sources
+CDEFS  = -DF_CPU=$(F_CPU)UL -DF_CLOCK=$(F_CLOCK)UL -DBOARD=BOARD_$(BOARD)
+CDEFS += -DUSE_NONSTANDARD_DESCRIPTOR_NAMES -DNO_STREAM_CALLBACKS -DUSB_DEVICE_ONLY
+CDEFS += -DFIXED_CONTROL_ENDPOINT_SIZE=8 -DUSE_SINGLE_DEVICE_CONFIGURATION
+CDEFS += -DUSE_STATIC_OPTIONS="(USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)"
+CDEFS += -DAUDIO_OUT_MONO
+
+# Place -D or -U options here for ASM sources
+ADEFS = -DF_CPU=$(F_CPU)
+
+
+# Place -D or -U options here for C++ sources
+CPPDEFS = -DF_CPU=$(F_CPU)UL
+#CPPDEFS += -D__STDC_LIMIT_MACROS
+#CPPDEFS += -D__STDC_CONSTANT_MACROS
+
+
+
+#---------------- Compiler Options C ----------------
+#  -g*:          generate debugging information
+#  -O*:          optimization level
+#  -f...:        tuning, see GCC manual and avr-libc documentation
+#  -Wall...:     warning level
+#  -Wa,...:      tell GCC to pass this to the assembler.
+#    -adhlns...: create assembler listing
+CFLAGS = -g$(DEBUG)
+CFLAGS += $(CDEFS)
+CFLAGS += -O$(OPT)
+CFLAGS += -funsigned-char
+CFLAGS += -funsigned-bitfields
+CFLAGS += -ffunction-sections
+CFLAGS += -fpack-struct
+CFLAGS += -fshort-enums
+CFLAGS += -finline-limit=20
+CFLAGS += -Wall
+CFLAGS += -Wstrict-prototypes
+CFLAGS += -Wundef
+#CFLAGS += -fno-unit-at-a-time
+#CFLAGS += -Wunreachable-code
+#CFLAGS += -Wsign-compare
+CFLAGS += -Wa,-adhlns=$(<:%.c=$(OBJDIR)/%.lst)
+CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))
+CFLAGS += $(CSTANDARD)
+
+
+#---------------- Compiler Options C++ ----------------
+#  -g*:          generate debugging information
+#  -O*:          optimization level
+#  -f...:        tuning, see GCC manual and avr-libc documentation
+#  -Wall...:     warning level
+#  -Wa,...:      tell GCC to pass this to the assembler.
+#    -adhlns...: create assembler listing
+CPPFLAGS = -g$(DEBUG)
+CPPFLAGS += $(CPPDEFS)
+CPPFLAGS += -O$(OPT)
+CPPFLAGS += -funsigned-char
+CPPFLAGS += -funsigned-bitfields
+CPPFLAGS += -fpack-struct
+CPPFLAGS += -fshort-enums
+CPPFLAGS += -fno-exceptions
+CPPFLAGS += -Wall
+CFLAGS += -Wundef
+#CPPFLAGS += -mshort-calls
+#CPPFLAGS += -fno-unit-at-a-time
+#CPPFLAGS += -Wstrict-prototypes
+#CPPFLAGS += -Wunreachable-code
+#CPPFLAGS += -Wsign-compare
+CPPFLAGS += -Wa,-adhlns=$(<:%.cpp=$(OBJDIR)/%.lst)
+CPPFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))
+#CPPFLAGS += $(CSTANDARD)
+
+
+#---------------- Assembler Options ----------------
+#  -Wa,...:   tell GCC to pass this to the assembler.
+#  -adhlns:   create listing
+#  -gstabs:   have the assembler create line number information; note that
+#             for use in COFF files, additional information about filenames
+#             and function names needs to be present in the assembler source
+#             files -- see avr-libc docs [FIXME: not yet described there]
+#  -listing-cont-lines: Sets the maximum number of continuation lines of hex 
+#       dump that will be displayed for a given single line of source input.
+ASFLAGS = $(ADEFS) -Wa,-adhlns=$(<:%.S=$(OBJDIR)/%.lst),-gstabs,--listing-cont-lines=100
+
+
+#---------------- Library Options ----------------
+# Minimalistic printf version
+PRINTF_LIB_MIN = -Wl,-u,vfprintf -lprintf_min
+
+# Floating point printf version (requires MATH_LIB = -lm below)
+PRINTF_LIB_FLOAT = -Wl,-u,vfprintf -lprintf_flt
+
+# If this is left blank, then it will use the Standard printf version.
+PRINTF_LIB = 
+#PRINTF_LIB = $(PRINTF_LIB_MIN)
+#PRINTF_LIB = $(PRINTF_LIB_FLOAT)
+
+
+# Minimalistic scanf version
+SCANF_LIB_MIN = -Wl,-u,vfscanf -lscanf_min
+
+# Floating point + %[ scanf version (requires MATH_LIB = -lm below)
+SCANF_LIB_FLOAT = -Wl,-u,vfscanf -lscanf_flt
+
+# If this is left blank, then it will use the Standard scanf version.
+SCANF_LIB = 
+#SCANF_LIB = $(SCANF_LIB_MIN)
+#SCANF_LIB = $(SCANF_LIB_FLOAT)
+
+
+MATH_LIB = -lm
+
+
+# List any extra directories to look for libraries here.
+#     Each directory must be seperated by a space.
+#     Use forward slashes for directory separators.
+#     For a directory that has spaces, enclose it in quotes.
+EXTRALIBDIRS = 
+
+
+
+#---------------- External Memory Options ----------------
+
+# 64 KB of external RAM, starting after internal RAM (ATmega128!),
+# used for variables (.data/.bss) and heap (malloc()).
+#EXTMEMOPTS = -Wl,-Tdata=0x801100,--defsym=__heap_end=0x80ffff
+
+# 64 KB of external RAM, starting after internal RAM (ATmega128!),
+# only used for heap (malloc()).
+#EXTMEMOPTS = -Wl,--section-start,.data=0x801100,--defsym=__heap_end=0x80ffff
+
+EXTMEMOPTS =
+
+
+
+#---------------- Linker Options ----------------
+#  -Wl,...:     tell GCC to pass this to linker.
+#    -Map:      create map file
+#    --cref:    add cross reference to  map file
+LDFLAGS = -Wl,-Map=$(TARGET).map,--cref
+LDFLAGS += -Wl,--relax 
+LDFLAGS += -Wl,--gc-sections
+LDFLAGS += $(EXTMEMOPTS)
+LDFLAGS += $(patsubst %,-L%,$(EXTRALIBDIRS))
+LDFLAGS += $(PRINTF_LIB) $(SCANF_LIB) $(MATH_LIB)
+#LDFLAGS += -T linker_script.x
+
+
+
+#---------------- Programming Options (avrdude) ----------------
+
+# Programming hardware: alf avr910 avrisp bascom bsd 
+# dt006 pavr picoweb pony-stk200 sp12 stk200 stk500
+#
+# Type: avrdude -c ?
+# to get a full listing.
+#
+AVRDUDE_PROGRAMMER = jtagmkII
+
+# com1 = serial port. Use lpt1 to connect to parallel port.
+AVRDUDE_PORT = usb
+
+AVRDUDE_WRITE_FLASH = -U flash:w:$(TARGET).hex
+#AVRDUDE_WRITE_EEPROM = -U eeprom:w:$(TARGET).eep
+
+
+# Uncomment the following if you want avrdude's erase cycle counter.
+# Note that this counter needs to be initialized first using -Yn,
+# see avrdude manual.
+#AVRDUDE_ERASE_COUNTER = -y
+
+# Uncomment the following if you do /not/ wish a verification to be
+# performed after programming the device.
+#AVRDUDE_NO_VERIFY = -V
+
+# Increase verbosity level.  Please use this when submitting bug
+# reports about avrdude. See <http://savannah.nongnu.org/projects/avrdude> 
+# to submit bug reports.
+#AVRDUDE_VERBOSE = -v -v
+
+AVRDUDE_FLAGS = -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER)
+AVRDUDE_FLAGS += $(AVRDUDE_NO_VERIFY)
+AVRDUDE_FLAGS += $(AVRDUDE_VERBOSE)
+AVRDUDE_FLAGS += $(AVRDUDE_ERASE_COUNTER)
+
+
+
+#---------------- Debugging Options ----------------
+
+# For simulavr only - target MCU frequency.
+DEBUG_MFREQ = $(F_CPU)
+
+# Set the DEBUG_UI to either gdb or insight.
+# DEBUG_UI = gdb
+DEBUG_UI = insight
+
+# Set the debugging back-end to either avarice, simulavr.
+DEBUG_BACKEND = avarice
+#DEBUG_BACKEND = simulavr
+
+# GDB Init Filename.
+GDBINIT_FILE = __avr_gdbinit
+
+# When using avarice settings for the JTAG
+JTAG_DEV = /dev/com1
+
+# Debugging port used to communicate between GDB / avarice / simulavr.
+DEBUG_PORT = 4242
+
+# Debugging host used to communicate between GDB / avarice / simulavr, normally
+#     just set to localhost unless doing some sort of crazy debugging when 
+#     avarice is running on a different computer.
+DEBUG_HOST = localhost
+
+
+
+#============================================================================
+
+
+# Define programs and commands.
+SHELL = sh
+CC = avr-gcc
+OBJCOPY = avr-objcopy
+OBJDUMP = avr-objdump
+SIZE = avr-size
+AR = avr-ar rcs
+NM = avr-nm
+AVRDUDE = avrdude
+REMOVE = rm -f
+REMOVEDIR = rm -rf
+COPY = cp
+WINSHELL = cmd
+
+# Define Messages
+# English
+MSG_ERRORS_NONE = Errors: none
+MSG_BEGIN = -------- begin --------
+MSG_END = --------  end  --------
+MSG_SIZE_BEFORE = Size before: 
+MSG_SIZE_AFTER = Size after:
+MSG_COFF = Converting to AVR COFF:
+MSG_EXTENDED_COFF = Converting to AVR Extended COFF:
+MSG_FLASH = Creating load file for Flash:
+MSG_EEPROM = Creating load file for EEPROM:
+MSG_EXTENDED_LISTING = Creating Extended Listing:
+MSG_SYMBOL_TABLE = Creating Symbol Table:
+MSG_LINKING = Linking:
+MSG_COMPILING = Compiling C:
+MSG_COMPILING_CPP = Compiling C++:
+MSG_ASSEMBLING = Assembling:
+MSG_CLEANING = Cleaning project:
+MSG_CREATING_LIBRARY = Creating library:
+
+
+
+
+# Define all object files.
+OBJ = $(SRC:%.c=$(OBJDIR)/%.o) $(CPPSRC:%.cpp=$(OBJDIR)/%.o) $(ASRC:%.S=$(OBJDIR)/%.o) 
+
+# Define all listing files.
+LST = $(SRC:%.c=$(OBJDIR)/%.lst) $(CPPSRC:%.cpp=$(OBJDIR)/%.lst) $(ASRC:%.S=$(OBJDIR)/%.lst) 
+
+
+# Compiler flags to generate dependency files.
+GENDEPFLAGS = -MMD -MP -MF .dep/$(@F).d
+
+
+# Combine all necessary flags and optional flags.
+# Add target processor to flags.
+ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS) $(GENDEPFLAGS)
+ALL_CPPFLAGS = -mmcu=$(MCU) -I. -x c++ $(CPPFLAGS) $(GENDEPFLAGS)
+ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
+
+
+
+
+
+# Default target.
+all: begin gccversion sizebefore build checkhooks checklibmode checkboard sizeafter end
+
+# Change the build target to build a HEX file or a library.
+build: elf hex eep lss sym
+#build: lib
+
+
+elf: $(TARGET).elf
+hex: $(TARGET).hex
+eep: $(TARGET).eep
+lss: $(TARGET).lss
+sym: $(TARGET).sym
+LIBNAME=lib$(TARGET).a
+lib: $(LIBNAME)
+
+
+
+# Eye candy.
+# AVR Studio 3.x does not check make's exit code but relies on
+# the following magic strings to be generated by the compile job.
+begin:
+	@echo
+	@echo $(MSG_BEGIN)
+
+end:
+	@echo $(MSG_END)
+	@echo
+
+
+# Display size of file.
+HEXSIZE = $(SIZE) --target=$(FORMAT) $(TARGET).hex
+ELFSIZE = $(SIZE) $(MCU_FLAG) $(FORMAT_FLAG) $(TARGET).elf
+MCU_FLAG = $(shell $(SIZE) --help | grep -- --mcu > /dev/null && echo --mcu=$(MCU) )
+FORMAT_FLAG = $(shell $(SIZE) --help | grep -- --format=.*avr > /dev/null && echo --format=avr )
+
+sizebefore:
+	@if test -f $(TARGET).elf; then echo; echo $(MSG_SIZE_BEFORE); $(ELFSIZE); \
+	2>/dev/null; echo; fi
+
+sizeafter:
+	@if test -f $(TARGET).elf; then echo; echo $(MSG_SIZE_AFTER); $(ELFSIZE); \
+	2>/dev/null; echo; fi
+
+checkhooks: build
+	@echo
+	@echo ------- Unhooked LUFA Events -------
+	@$(shell) (grep -s '^EVENT_.*LUFA/.*\\.o' $(TARGET).map | \
+	           cut -d' ' -f1 | cut -d'_' -f2- | grep ".*") || \
+			   echo "(None)"
+	@echo ------------------------------------
+
+checklibmode:
+	@echo
+	@echo ----------- Library Mode -----------
+	@$(shell) ($(CC) $(ALL_CFLAGS) -E -dM - < /dev/null \
+	          | grep 'USB_\(DEVICE\|HOST\)_ONLY' | cut -d' ' -f2 | grep ".*") \
+	          || echo "No specific mode (both device and host mode allowable)."
+	@echo ------------------------------------
+
+checkboard:
+	@echo
+	@echo ---------- Selected Board ----------
+	@echo Selected board model is $(BOARD).
+	@echo ------------------------------------
+	
+# Display compiler version information.
+gccversion : 
+	@$(CC) --version
+
+
+
+# Program the device.  
+program: $(TARGET).hex $(TARGET).eep
+	$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH) $(AVRDUDE_WRITE_EEPROM)
+
+flip: $(TARGET).hex
+	batchisp -hardware usb -device $(MCU) -operation erase f
+	batchisp -hardware usb -device $(MCU) -operation loadbuffer $(TARGET).hex program
+	batchisp -hardware usb -device $(MCU) -operation start reset 0
+
+dfu: $(TARGET).hex
+	dfu-programmer $(MCU) erase
+	dfu-programmer $(MCU) flash --debug 1 $(TARGET).hex
+	dfu-programmer $(MCU) reset
+
+flip-ee: $(TARGET).hex $(TARGET).eep
+	copy $(TARGET).eep $(TARGET)eep.hex
+	batchisp -hardware usb -device $(MCU) -operation memory EEPROM erase
+	batchisp -hardware usb -device $(MCU) -operation memory EEPROM loadbuffer $(TARGET)eep.hex program
+	batchisp -hardware usb -device $(MCU) -operation start reset 0
+
+dfu-ee: $(TARGET).hex $(TARGET).eep
+	dfu-programmer $(MCU) flash-eeprom --debug 1 --suppress-bootloader-mem $(TARGET).eep
+	dfu-programmer $(MCU) reset
+
+
+# Generate avr-gdb config/init file which does the following:
+#     define the reset signal, load the target file, connect to target, and set 
+#     a breakpoint at main().
+gdb-config: 
+	@$(REMOVE) $(GDBINIT_FILE)
+	@echo define reset >> $(GDBINIT_FILE)
+	@echo SIGNAL SIGHUP >> $(GDBINIT_FILE)
+	@echo end >> $(GDBINIT_FILE)
+	@echo file $(TARGET).elf >> $(GDBINIT_FILE)
+	@echo target remote $(DEBUG_HOST):$(DEBUG_PORT)  >> $(GDBINIT_FILE)
+ifeq ($(DEBUG_BACKEND),simulavr)
+	@echo load  >> $(GDBINIT_FILE)
+endif
+	@echo break main >> $(GDBINIT_FILE)
+
+debug: gdb-config $(TARGET).elf
+ifeq ($(DEBUG_BACKEND), avarice)
+	@echo Starting AVaRICE - Press enter when "waiting to connect" message displays.
+	@$(WINSHELL) /c start avarice --jtag $(JTAG_DEV) --erase --program --file \
+	$(TARGET).elf $(DEBUG_HOST):$(DEBUG_PORT)
+	@$(WINSHELL) /c pause
+
+else
+	@$(WINSHELL) /c start simulavr --gdbserver --device $(MCU) --clock-freq \
+	$(DEBUG_MFREQ) --port $(DEBUG_PORT)
+endif
+	@$(WINSHELL) /c start avr-$(DEBUG_UI) --command=$(GDBINIT_FILE)
+
+
+
+
+# Convert ELF to COFF for use in debugging / simulating in AVR Studio or VMLAB.
+COFFCONVERT = $(OBJCOPY) --debugging
+COFFCONVERT += --change-section-address .data-0x800000
+COFFCONVERT += --change-section-address .bss-0x800000
+COFFCONVERT += --change-section-address .noinit-0x800000
+COFFCONVERT += --change-section-address .eeprom-0x810000
+
+
+
+coff: $(TARGET).elf
+	@echo
+	@echo $(MSG_COFF) $(TARGET).cof
+	$(COFFCONVERT) -O coff-avr $< $(TARGET).cof
+
+
+extcoff: $(TARGET).elf
+	@echo
+	@echo $(MSG_EXTENDED_COFF) $(TARGET).cof
+	$(COFFCONVERT) -O coff-ext-avr $< $(TARGET).cof
+
+
+
+# Create final output files (.hex, .eep) from ELF output file.
+%.hex: %.elf
+	@echo
+	@echo $(MSG_FLASH) $@
+	$(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@
+
+%.eep: %.elf
+	@echo
+	@echo $(MSG_EEPROM) $@
+	-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
+	--change-section-lma .eeprom=0 --no-change-warnings -O $(FORMAT) $< $@ || exit 0
+
+# Create extended listing file from ELF output file.
+%.lss: %.elf
+	@echo
+	@echo $(MSG_EXTENDED_LISTING) $@
+	$(OBJDUMP) -h -z -S $< > $@
+
+# Create a symbol table from ELF output file.
+%.sym: %.elf
+	@echo
+	@echo $(MSG_SYMBOL_TABLE) $@
+	$(NM) -n $< > $@
+
+
+
+# Create library from object files.
+.SECONDARY : $(TARGET).a
+.PRECIOUS : $(OBJ)
+%.a: $(OBJ)
+	@echo
+	@echo $(MSG_CREATING_LIBRARY) $@
+	$(AR) $@ $(OBJ)
+
+
+# Link: create ELF output file from object files.
+.SECONDARY : $(TARGET).elf
+.PRECIOUS : $(OBJ)
+%.elf: $(OBJ)
+	@echo
+	@echo $(MSG_LINKING) $@
+	$(CC) $(ALL_CFLAGS) $^ --output $@ $(LDFLAGS)
+
+
+# Compile: create object files from C source files.
+$(OBJDIR)/%.o : %.c
+	@echo
+	@echo $(MSG_COMPILING) $<
+	$(CC) -c $(ALL_CFLAGS) $< -o $@ 
+
+
+# Compile: create object files from C++ source files.
+$(OBJDIR)/%.o : %.cpp
+	@echo
+	@echo $(MSG_COMPILING_CPP) $<
+	$(CC) -c $(ALL_CPPFLAGS) $< -o $@ 
+
+
+# Compile: create assembler files from C source files.
+%.s : %.c
+	$(CC) -S $(ALL_CFLAGS) $< -o $@
+
+
+# Compile: create assembler files from C++ source files.
+%.s : %.cpp
+	$(CC) -S $(ALL_CPPFLAGS) $< -o $@
+
+
+# Assemble: create object files from assembler source files.
+$(OBJDIR)/%.o : %.S
+	@echo
+	@echo $(MSG_ASSEMBLING) $<
+	$(CC) -c $(ALL_ASFLAGS) $< -o $@
+
+
+# Create preprocessed source for use in sending a bug report.
+%.i : %.c
+	$(CC) -E -mmcu=$(MCU) -I. $(CFLAGS) $< -o $@ 
+	
+
+# Target: clean project.
+clean: begin clean_list clean_binary end
+
+clean_binary:
+	$(REMOVE) $(TARGET).hex
+	
+clean_list:
+	@echo $(MSG_CLEANING)
+	$(REMOVE) $(TARGET).eep
+	$(REMOVE) $(TARGET)eep.hex
+	$(REMOVE) $(TARGET).cof
+	$(REMOVE) $(TARGET).elf
+	$(REMOVE) $(TARGET).map
+	$(REMOVE) $(TARGET).sym
+	$(REMOVE) $(TARGET).lss
+	$(REMOVE) $(SRC:%.c=$(OBJDIR)/%.o)
+	$(REMOVE) $(SRC:%.c=$(OBJDIR)/%.lst)
+	$(REMOVE) $(SRC:.c=.s)
+	$(REMOVE) $(SRC:.c=.d)
+	$(REMOVE) $(SRC:.c=.i)
+	$(REMOVEDIR) .dep
+
+
+doxygen:
+	@echo Generating Project Documentation...
+	@doxygen Doxygen.conf
+	@echo Documentation Generation Complete.
+
+clean_doxygen:
+	rm -rf Documentation
+
+# Create object files directory
+$(shell mkdir $(OBJDIR) 2>/dev/null)
+
+
+# Include the dependency files.
+-include $(shell mkdir .dep 2>/dev/null) $(wildcard .dep/*)
+
+
+# Listing of phony targets.
+.PHONY : all checkhooks checklibmode checkboard   \
+begin finish end sizebefore sizeafter gccversion  \
+build elf hex eep lss sym coff extcoff clean      \
+clean_list clean_binary program debug gdb-config  \
+doxygen dfu flip flip-ee dfu-ee