Merge commit '60b30c036397cb5627fa374bb930794b225daa29' as 'lib/lufa'

9 files changed, 3426 insertions, 0 deletions

diff --git a/lib/lufa/Demos/Device/LowLevel/MIDI/Config/LUFAConfig.h b/lib/lufa/Demos/Device/LowLevel/MIDI/Config/LUFAConfig.h
new file mode 100644
index 0000000000..00eefc7bf7
--- /dev/null
+++ b/lib/lufa/Demos/Device/LowLevel/MIDI/Config/LUFAConfig.h
@@ -0,0 +1,126 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2017.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  Permission to use, copy, modify, distribute, and sell this
+  software and its documentation for any purpose is hereby granted
+  without fee, provided that the above copyright notice appear in
+  all copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaims all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *  \brief LUFA Library Configuration Header File
+ *
+ *  This header file is used to configure LUFA's compile time options,
+ *  as an alternative to the compile time constants supplied through
+ *  a makefile.
+ *
+ *  For information on what each token does, refer to the LUFA
+ *  manual section "Summary of Compile Tokens".
+ */
+
+#ifndef _LUFA_CONFIG_H_
+#define _LUFA_CONFIG_H_
+
+	#if (ARCH == ARCH_AVR8)
+
+		/* Non-USB Related Configuration Tokens: */
+//		#define DISABLE_TERMINAL_CODES
+
+		/* USB Class Driver Related Tokens: */
+//		#define HID_HOST_BOOT_PROTOCOL_ONLY
+//		#define HID_STATETABLE_STACK_DEPTH       {Insert Value Here}
+//		#define HID_USAGE_STACK_DEPTH            {Insert Value Here}
+//		#define HID_MAX_COLLECTIONS              {Insert Value Here}
+//		#define HID_MAX_REPORTITEMS              {Insert Value Here}
+//		#define HID_MAX_REPORT_IDS               {Insert Value Here}
+//		#define NO_CLASS_DRIVER_AUTOFLUSH
+
+		/* General USB Driver Related Tokens: */
+//		#define ORDERED_EP_CONFIG
+		#define USE_STATIC_OPTIONS               (USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)
+		#define USB_DEVICE_ONLY
+//		#define USB_HOST_ONLY
+//		#define USB_STREAM_TIMEOUT_MS            {Insert Value Here}
+//		#define NO_LIMITED_CONTROLLER_CONNECT
+//		#define NO_SOF_EVENTS
+
+		/* USB Device Mode Driver Related Tokens: */
+//		#define USE_RAM_DESCRIPTORS
+		#define USE_FLASH_DESCRIPTORS
+//		#define USE_EEPROM_DESCRIPTORS
+//		#define NO_INTERNAL_SERIAL
+		#define FIXED_CONTROL_ENDPOINT_SIZE      8
+//		#define DEVICE_STATE_AS_GPIOR            {Insert Value Here}
+		#define FIXED_NUM_CONFIGURATIONS         1
+//		#define CONTROL_ONLY_DEVICE
+//		#define INTERRUPT_CONTROL_ENDPOINT
+//		#define NO_DEVICE_REMOTE_WAKEUP
+//		#define NO_DEVICE_SELF_POWER
+
+		/* USB Host Mode Driver Related Tokens: */
+//		#define HOST_STATE_AS_GPIOR              {Insert Value Here}
+//		#define USB_HOST_TIMEOUT_MS              {Insert Value Here}
+//		#define HOST_DEVICE_SETTLE_DELAY_MS	     {Insert Value Here}
+//		#define NO_AUTO_VBUS_MANAGEMENT
+//		#define INVERTED_VBUS_ENABLE_LINE
+
+	#elif (ARCH == ARCH_XMEGA)
+
+		/* Non-USB Related Configuration Tokens: */
+//		#define DISABLE_TERMINAL_CODES
+
+		/* USB Class Driver Related Tokens: */
+//		#define HID_HOST_BOOT_PROTOCOL_ONLY
+//		#define HID_STATETABLE_STACK_DEPTH       {Insert Value Here}
+//		#define HID_USAGE_STACK_DEPTH            {Insert Value Here}
+//		#define HID_MAX_COLLECTIONS              {Insert Value Here}
+//		#define HID_MAX_REPORTITEMS              {Insert Value Here}
+//		#define HID_MAX_REPORT_IDS               {Insert Value Here}
+//		#define NO_CLASS_DRIVER_AUTOFLUSH
+
+		/* General USB Driver Related Tokens: */
+		#define USE_STATIC_OPTIONS               (USB_DEVICE_OPT_FULLSPEED | USB_OPT_RC32MCLKSRC | USB_OPT_BUSEVENT_PRIHIGH)
+//		#define USB_STREAM_TIMEOUT_MS            {Insert Value Here}
+//		#define NO_LIMITED_CONTROLLER_CONNECT
+//		#define NO_SOF_EVENTS
+
+		/* USB Device Mode Driver Related Tokens: */
+//		#define USE_RAM_DESCRIPTORS
+		#define USE_FLASH_DESCRIPTORS
+//		#define USE_EEPROM_DESCRIPTORS
+//		#define NO_INTERNAL_SERIAL
+		#define FIXED_CONTROL_ENDPOINT_SIZE      8
+//		#define DEVICE_STATE_AS_GPIOR            {Insert Value Here}
+		#define FIXED_NUM_CONFIGURATIONS         1
+//		#define CONTROL_ONLY_DEVICE
+		#define MAX_ENDPOINT_INDEX               2
+//		#define NO_DEVICE_REMOTE_WAKEUP
+//		#define NO_DEVICE_SELF_POWER
+
+	#else
+
+		#error Unsupported architecture for this LUFA configuration file.
+
+	#endif
+#endif
diff --git a/lib/lufa/Demos/Device/LowLevel/MIDI/Descriptors.c b/lib/lufa/Demos/Device/LowLevel/MIDI/Descriptors.c
new file mode 100644
index 0000000000..b4bcea1ee7
--- /dev/null
+++ b/lib/lufa/Demos/Device/LowLevel/MIDI/Descriptors.c
@@ -0,0 +1,314 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2017.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  Permission to use, copy, modify, distribute, and sell this
+  software and its documentation for any purpose is hereby granted
+  without fee, provided that the above copyright notice appear in
+  all copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaims all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *
+ *  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.
+ */
+const USB_Descriptor_Device_t PROGMEM DeviceDescriptor =
+{
+	.Header                 = {.Size = sizeof(USB_Descriptor_Device_t), .Type = DTYPE_Device},
+
+	.USBSpecification       = VERSION_BCD(1,1,0),
+	.Class                  = USB_CSCP_NoDeviceClass,
+	.SubClass               = USB_CSCP_NoDeviceSubclass,
+	.Protocol               = USB_CSCP_NoDeviceProtocol,
+
+	.Endpoint0Size          = FIXED_CONTROL_ENDPOINT_SIZE,
+
+	.VendorID               = 0x03EB,
+	.ProductID              = 0x2048,
+	.ReleaseNumber          = VERSION_BCD(0,0,1),
+
+	.ManufacturerStrIndex   = STRING_ID_Manufacturer,
+	.ProductStrIndex        = STRING_ID_Product,
+	.SerialNumStrIndex      = NO_DESCRIPTOR,
+
+	.NumberOfConfigurations = FIXED_NUM_CONFIGURATIONS
+};
+
+/** 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.
+ */
+const 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_RESERVED | USB_CONFIG_ATTR_SELFPOWERED),
+
+			.MaxPowerConsumption      = USB_CONFIG_POWER_MA(100)
+		},
+
+	.Audio_ControlInterface =
+		{
+			.Header                   = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
+
+			.InterfaceNumber          = INTERFACE_ID_AudioControl,
+			.AlternateSetting         = 0,
+
+			.TotalEndpoints           = 0,
+
+			.Class                    = AUDIO_CSCP_AudioClass,
+			.SubClass                 = AUDIO_CSCP_ControlSubclass,
+			.Protocol                 = AUDIO_CSCP_ControlProtocol,
+
+			.InterfaceStrIndex        = NO_DESCRIPTOR
+		},
+
+	.Audio_ControlInterface_SPC =
+		{
+			.Header                   = {.Size = sizeof(USB_Audio_Descriptor_Interface_AC_t), .Type = DTYPE_CSInterface},
+			.Subtype                  = AUDIO_DSUBTYPE_CSInterface_Header,
+
+			.ACSpecification          = VERSION_BCD(1,0,0),
+			.TotalLength              = sizeof(USB_Audio_Descriptor_Interface_AC_t),
+
+			.InCollection             = 1,
+			.InterfaceNumber          = INTERFACE_ID_AudioStream,
+		},
+
+	.Audio_StreamInterface =
+		{
+			.Header                   = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
+
+			.InterfaceNumber          = INTERFACE_ID_AudioStream,
+			.AlternateSetting         = 0,
+
+			.TotalEndpoints           = 2,
+
+			.Class                    = AUDIO_CSCP_AudioClass,
+			.SubClass                 = AUDIO_CSCP_MIDIStreamingSubclass,
+			.Protocol                 = AUDIO_CSCP_StreamingProtocol,
+
+			.InterfaceStrIndex        = NO_DESCRIPTOR
+		},
+
+	.Audio_StreamInterface_SPC =
+		{
+			.Header                   = {.Size = sizeof(USB_MIDI_Descriptor_AudioInterface_AS_t), .Type = DTYPE_CSInterface},
+			.Subtype                  = AUDIO_DSUBTYPE_CSInterface_General,
+
+			.AudioSpecification       = VERSION_BCD(1,0,0),
+
+			.TotalLength              = (sizeof(USB_Descriptor_Configuration_t) -
+			                             offsetof(USB_Descriptor_Configuration_t, Audio_StreamInterface_SPC))
+		},
+
+	.MIDI_In_Jack_Emb =
+		{
+			.Header                   = {.Size = sizeof(USB_MIDI_Descriptor_InputJack_t), .Type = DTYPE_CSInterface},
+			.Subtype                  = AUDIO_DSUBTYPE_CSInterface_InputTerminal,
+
+			.JackType                 = MIDI_JACKTYPE_Embedded,
+			.JackID                   = 0x01,
+
+			.JackStrIndex             = NO_DESCRIPTOR
+		},
+
+	.MIDI_In_Jack_Ext =
+		{
+			.Header                   = {.Size = sizeof(USB_MIDI_Descriptor_InputJack_t), .Type = DTYPE_CSInterface},
+			.Subtype                  = AUDIO_DSUBTYPE_CSInterface_InputTerminal,
+
+			.JackType                 = MIDI_JACKTYPE_External,
+			.JackID                   = 0x02,
+
+			.JackStrIndex             = NO_DESCRIPTOR
+		},
+
+	.MIDI_Out_Jack_Emb =
+		{
+			.Header                   = {.Size = sizeof(USB_MIDI_Descriptor_OutputJack_t), .Type = DTYPE_CSInterface},
+			.Subtype                  = AUDIO_DSUBTYPE_CSInterface_OutputTerminal,
+
+			.JackType                 = MIDI_JACKTYPE_Embedded,
+			.JackID                   = 0x03,
+
+			.NumberOfPins             = 1,
+			.SourceJackID             = {0x02},
+			.SourcePinID              = {0x01},
+
+			.JackStrIndex             = NO_DESCRIPTOR
+		},
+
+	.MIDI_Out_Jack_Ext =
+		{
+			.Header                   = {.Size = sizeof(USB_MIDI_Descriptor_OutputJack_t), .Type = DTYPE_CSInterface},
+			.Subtype                  = AUDIO_DSUBTYPE_CSInterface_OutputTerminal,
+
+			.JackType                 = MIDI_JACKTYPE_External,
+			.JackID                   = 0x04,
+
+			.NumberOfPins             = 1,
+			.SourceJackID             = {0x01},
+			.SourcePinID              = {0x01},
+
+			.JackStrIndex             = NO_DESCRIPTOR
+		},
+
+	.MIDI_In_Jack_Endpoint =
+		{
+			.Endpoint =
+				{
+					.Header              = {.Size = sizeof(USB_Audio_Descriptor_StreamEndpoint_Std_t), .Type = DTYPE_Endpoint},
+
+					.EndpointAddress     = MIDI_STREAM_OUT_EPADDR,
+					.Attributes          = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
+					.EndpointSize        = MIDI_STREAM_EPSIZE,
+					.PollingIntervalMS   = 0x05
+				},
+
+			.Refresh                  = 0,
+			.SyncEndpointNumber       = 0
+		},
+
+	.MIDI_In_Jack_Endpoint_SPC =
+		{
+			.Header                   = {.Size = sizeof(USB_MIDI_Descriptor_Jack_Endpoint_t), .Type = DTYPE_CSEndpoint},
+			.Subtype                  = AUDIO_DSUBTYPE_CSEndpoint_General,
+
+			.TotalEmbeddedJacks       = 0x01,
+			.AssociatedJackID         = {0x01}
+		},
+
+	.MIDI_Out_Jack_Endpoint =
+		{
+			.Endpoint =
+				{
+					.Header              = {.Size = sizeof(USB_Audio_Descriptor_StreamEndpoint_Std_t), .Type = DTYPE_Endpoint},
+
+					.EndpointAddress     = MIDI_STREAM_IN_EPADDR,
+					.Attributes          = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
+					.EndpointSize        = MIDI_STREAM_EPSIZE,
+					.PollingIntervalMS   = 0x05
+				},
+
+			.Refresh                  = 0,
+			.SyncEndpointNumber       = 0
+		},
+
+	.MIDI_Out_Jack_Endpoint_SPC =
+		{
+			.Header                   = {.Size = sizeof(USB_MIDI_Descriptor_Jack_Endpoint_t), .Type = DTYPE_CSEndpoint},
+			.Subtype                  = AUDIO_DSUBTYPE_CSEndpoint_General,
+
+			.TotalEmbeddedJacks       = 0x01,
+			.AssociatedJackID         = {0x03}
+		}
+};
+
+/** 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.
+ */
+const USB_Descriptor_String_t PROGMEM LanguageString = USB_STRING_DESCRIPTOR_ARRAY(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.
+ */
+const USB_Descriptor_String_t PROGMEM ManufacturerString = USB_STRING_DESCRIPTOR(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.
+ */
+const USB_Descriptor_String_t PROGMEM ProductString = USB_STRING_DESCRIPTOR(L"LUFA MIDI 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 uint16_t wIndex,
+                                    const void** const DescriptorAddress)
+{
+	const uint8_t  DescriptorType   = (wValue >> 8);
+	const uint8_t  DescriptorNumber = (wValue & 0xFF);
+
+	const void* Address = NULL;
+	uint16_t    Size    = NO_DESCRIPTOR;
+
+	switch (DescriptorType)
+	{
+		case DTYPE_Device:
+			Address = &DeviceDescriptor;
+			Size    = sizeof(USB_Descriptor_Device_t);
+			break;
+		case DTYPE_Configuration:
+			Address = &ConfigurationDescriptor;
+			Size    = sizeof(USB_Descriptor_Configuration_t);
+			break;
+		case DTYPE_String:
+			switch (DescriptorNumber)
+			{
+				case STRING_ID_Language:
+					Address = &LanguageString;
+					Size    = pgm_read_byte(&LanguageString.Header.Size);
+					break;
+				case STRING_ID_Manufacturer:
+					Address = &ManufacturerString;
+					Size    = pgm_read_byte(&ManufacturerString.Header.Size);
+					break;
+				case STRING_ID_Product:
+					Address = &ProductString;
+					Size    = pgm_read_byte(&ProductString.Header.Size);
+					break;
+			}
+
+			break;
+	}
+
+	*DescriptorAddress = Address;
+	return Size;
+}
+
diff --git a/lib/lufa/Demos/Device/LowLevel/MIDI/Descriptors.h b/lib/lufa/Demos/Device/LowLevel/MIDI/Descriptors.h
new file mode 100644
index 0000000000..a477d9dc82
--- /dev/null
+++ b/lib/lufa/Demos/Device/LowLevel/MIDI/Descriptors.h
@@ -0,0 +1,108 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2017.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  Permission to use, copy, modify, distribute, and sell this
+  software and its documentation for any purpose is hereby granted
+  without fee, provided that the above copyright notice appear in
+  all copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaims all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *
+ *  Header file for Descriptors.c.
+ */
+
+#ifndef _DESCRIPTORS_H_
+#define _DESCRIPTORS_H_
+
+	/* Includes: */
+		#include <LUFA/Drivers/USB/USB.h>
+
+		#include <avr/pgmspace.h>
+
+	/* Macros: */
+		/** Endpoint address of the MIDI streaming data IN endpoint, for device-to-host data transfers. */
+		#define MIDI_STREAM_IN_EPADDR       (ENDPOINT_DIR_IN  | 1)
+
+		/** Endpoint address of the MIDI streaming data OUT endpoint, for host-to-device data transfers. */
+		#define MIDI_STREAM_OUT_EPADDR      (ENDPOINT_DIR_OUT | 2)
+
+		/** Endpoint size in bytes of the Audio isochronous streaming data IN and OUT endpoints. */
+		#define MIDI_STREAM_EPSIZE          64
+
+	/* 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;
+
+			// MIDI Audio Control Interface
+			USB_Descriptor_Interface_t                Audio_ControlInterface;
+			USB_Audio_Descriptor_Interface_AC_t       Audio_ControlInterface_SPC;
+
+			// MIDI Audio Streaming Interface
+			USB_Descriptor_Interface_t                Audio_StreamInterface;
+			USB_MIDI_Descriptor_AudioInterface_AS_t   Audio_StreamInterface_SPC;
+			USB_MIDI_Descriptor_InputJack_t           MIDI_In_Jack_Emb;
+			USB_MIDI_Descriptor_InputJack_t           MIDI_In_Jack_Ext;
+			USB_MIDI_Descriptor_OutputJack_t          MIDI_Out_Jack_Emb;
+			USB_MIDI_Descriptor_OutputJack_t          MIDI_Out_Jack_Ext;
+			USB_Audio_Descriptor_StreamEndpoint_Std_t MIDI_In_Jack_Endpoint;
+			USB_MIDI_Descriptor_Jack_Endpoint_t       MIDI_In_Jack_Endpoint_SPC;
+			USB_Audio_Descriptor_StreamEndpoint_Std_t MIDI_Out_Jack_Endpoint;
+			USB_MIDI_Descriptor_Jack_Endpoint_t       MIDI_Out_Jack_Endpoint_SPC;
+		} USB_Descriptor_Configuration_t;
+
+		/** Enum for the device interface descriptor IDs within the device. Each interface descriptor
+		 *  should have a unique ID index associated with it, which can be used to refer to the
+		 *  interface from other descriptors.
+		 */
+		enum InterfaceDescriptors_t
+		{
+			INTERFACE_ID_AudioControl = 0, /**< Audio control interface descriptor ID */
+			INTERFACE_ID_AudioStream  = 1, /**< Audio stream interface descriptor ID */
+		};
+
+		/** Enum for the device string descriptor IDs within the device. Each string descriptor should
+		 *  have a unique ID index associated with it, which can be used to refer to the string from
+		 *  other descriptors.
+		 */
+		enum StringDescriptors_t
+		{
+			STRING_ID_Language     = 0, /**< Supported Languages string descriptor ID (must be zero) */
+			STRING_ID_Manufacturer = 1, /**< Manufacturer string ID */
+			STRING_ID_Product      = 2, /**< Product string ID */
+		};
+
+	/* Function Prototypes: */
+		uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
+		                                    const uint16_t wIndex,
+		                                    const void** const DescriptorAddress)
+		                                    ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(3);
+
+#endif
+
diff --git a/lib/lufa/Demos/Device/LowLevel/MIDI/MIDI.c b/lib/lufa/Demos/Device/LowLevel/MIDI/MIDI.c
new file mode 100644
index 0000000000..0fdb04597c
--- /dev/null
+++ b/lib/lufa/Demos/Device/LowLevel/MIDI/MIDI.c
@@ -0,0 +1,224 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2017.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  Permission to use, copy, modify, distribute, and sell this
+  software and its documentation for any purpose is hereby granted
+  without fee, provided that the above copyright notice appear in
+  all copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaims all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *
+ *  Main source file for the MIDI input demo. This file contains the main tasks of the demo and
+ *  is responsible for the initial application hardware configuration.
+ */
+
+#include "MIDI.h"
+
+/** Main program entry point. This routine configures the hardware required by the application, then
+ *  enters a loop to run the application tasks in sequence.
+ */
+int main(void)
+{
+	SetupHardware();
+
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+	GlobalInterruptEnable();
+
+	for (;;)
+	{
+		MIDI_Task();
+		USB_USBTask();
+	}
+}
+
+/** Configures the board hardware and chip peripherals for the demo's functionality. */
+void SetupHardware(void)
+{
+#if (ARCH == ARCH_AVR8)
+	/* Disable watchdog if enabled by bootloader/fuses */
+	MCUSR &= ~(1 << WDRF);
+	wdt_disable();
+
+	/* Disable clock division */
+	clock_prescale_set(clock_div_1);
+#elif (ARCH == ARCH_XMEGA)
+	/* Start the PLL to multiply the 2MHz RC oscillator to 32MHz and switch the CPU core to run from it */
+	XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU);
+	XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL);
+
+	/* Start the 32MHz internal RC oscillator and start the DFLL to increase it to 48MHz using the USB SOF as a reference */
+	XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
+	XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB);
+
+	PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm;
+#endif
+
+	/* Hardware Initialization */
+	Joystick_Init();
+	LEDs_Init();
+	Buttons_Init();
+	USB_Init();
+}
+
+/** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs. */
+void EVENT_USB_Device_Connect(void)
+{
+	/* Indicate USB enumerating */
+	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
+}
+
+/** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
+ *  the status LEDs, disables the sample update and PWM output timers and stops the USB and MIDI management tasks.
+ */
+void EVENT_USB_Device_Disconnect(void)
+{
+	/* Indicate USB not ready */
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+}
+
+/** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration
+ *  of the USB device after enumeration - the device endpoints are configured and the MIDI management task started.
+ */
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+	bool ConfigSuccess = true;
+
+	/* Setup MIDI Data Endpoints */
+	ConfigSuccess &= Endpoint_ConfigureEndpoint(MIDI_STREAM_IN_EPADDR, EP_TYPE_BULK, MIDI_STREAM_EPSIZE, 1);
+	ConfigSuccess &= Endpoint_ConfigureEndpoint(MIDI_STREAM_OUT_EPADDR, EP_TYPE_BULK, MIDI_STREAM_EPSIZE, 1);
+
+	/* Indicate endpoint configuration success or failure */
+	LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
+}
+
+/** Task to handle the generation of MIDI note change events in response to presses of the board joystick, and send them
+ *  to the host.
+ */
+void MIDI_Task(void)
+{
+	static uint8_t PrevJoystickStatus;
+
+	/* Device must be connected and configured for the task to run */
+	if (USB_DeviceState != DEVICE_STATE_Configured)
+	  return;
+
+	Endpoint_SelectEndpoint(MIDI_STREAM_IN_EPADDR);
+
+	if (Endpoint_IsINReady())
+	{
+		uint8_t MIDICommand = 0;
+		uint8_t MIDIPitch;
+
+		uint8_t JoystickStatus  = Joystick_GetStatus();
+		uint8_t JoystickChanges = (JoystickStatus ^ PrevJoystickStatus);
+
+		/* Get board button status - if pressed use channel 10 (percussion), otherwise use channel 1 */
+		uint8_t Channel = ((Buttons_GetStatus() & BUTTONS_BUTTON1) ? MIDI_CHANNEL(10) : MIDI_CHANNEL(1));
+
+		if (JoystickChanges & JOY_LEFT)
+		{
+			MIDICommand = ((JoystickStatus & JOY_LEFT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
+			MIDIPitch   = 0x3C;
+		}
+
+		if (JoystickChanges & JOY_UP)
+		{
+			MIDICommand = ((JoystickStatus & JOY_UP)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
+			MIDIPitch   = 0x3D;
+		}
+
+		if (JoystickChanges & JOY_RIGHT)
+		{
+			MIDICommand = ((JoystickStatus & JOY_RIGHT)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
+			MIDIPitch   = 0x3E;
+		}
+
+		if (JoystickChanges & JOY_DOWN)
+		{
+			MIDICommand = ((JoystickStatus & JOY_DOWN)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
+			MIDIPitch   = 0x3F;
+		}
+
+		if (JoystickChanges & JOY_PRESS)
+		{
+			MIDICommand = ((JoystickStatus & JOY_PRESS)? MIDI_COMMAND_NOTE_ON : MIDI_COMMAND_NOTE_OFF);
+			MIDIPitch   = 0x3B;
+		}
+
+		/* Check if a MIDI command is to be sent */
+		if (MIDICommand)
+		{
+			MIDI_EventPacket_t MIDIEvent = (MIDI_EventPacket_t)
+				{
+					.Event       = MIDI_EVENT(0, MIDICommand),
+
+					.Data1       = MIDICommand | Channel,
+					.Data2       = MIDIPitch,
+					.Data3       = MIDI_STANDARD_VELOCITY,
+				};
+
+			/* Write the MIDI event packet to the endpoint */
+			Endpoint_Write_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL);
+
+			/* Send the data in the endpoint to the host */
+			Endpoint_ClearIN();
+		}
+
+		/* Save previous joystick value for next joystick change detection */
+		PrevJoystickStatus = JoystickStatus;
+	}
+
+	/* Select the MIDI OUT stream */
+	Endpoint_SelectEndpoint(MIDI_STREAM_OUT_EPADDR);
+
+	/* Check if a MIDI command has been received */
+	if (Endpoint_IsOUTReceived())
+	{
+		MIDI_EventPacket_t MIDIEvent;
+
+		/* Read the MIDI event packet from the endpoint */
+		Endpoint_Read_Stream_LE(&MIDIEvent, sizeof(MIDIEvent), NULL);
+
+		/* Check to see if the sent command is a note on message with a non-zero velocity */
+		if ((MIDIEvent.Event == MIDI_EVENT(0, MIDI_COMMAND_NOTE_ON)) && (MIDIEvent.Data3 > 0))
+		{
+			/* Change LEDs depending on the pitch of the sent note */
+			LEDs_SetAllLEDs(MIDIEvent.Data2 > 64 ? LEDS_LED1 : LEDS_LED2);
+		}
+		else
+		{
+			/* Turn off all LEDs in response to non Note On messages */
+			LEDs_SetAllLEDs(LEDS_NO_LEDS);
+		}
+
+		/* If the endpoint is now empty, clear the bank */
+		if (!(Endpoint_BytesInEndpoint()))
+		{
+			/* Clear the endpoint ready for new packet */
+			Endpoint_ClearOUT();
+		}
+	}
+}
+
diff --git a/lib/lufa/Demos/Device/LowLevel/MIDI/MIDI.h b/lib/lufa/Demos/Device/LowLevel/MIDI/MIDI.h
new file mode 100644
index 0000000000..55ba499b50
--- /dev/null
+++ b/lib/lufa/Demos/Device/LowLevel/MIDI/MIDI.h
@@ -0,0 +1,76 @@
+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2017.
+
+  dean [at] fourwalledcubicle [dot] com
+           www.lufa-lib.org
+*/
+
+/*
+  Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  Permission to use, copy, modify, distribute, and sell this
+  software and its documentation for any purpose is hereby granted
+  without fee, provided that the above copyright notice appear in
+  all copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaims all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \file
+ *
+ *  Header file for AudioOutput.c.
+ */
+
+#ifndef _AUDIO_OUTPUT_H_
+#define _AUDIO_OUTPUT_H_
+
+	/* Includes: */
+		#include <avr/io.h>
+		#include <avr/wdt.h>
+		#include <avr/power.h>
+		#include <avr/interrupt.h>
+		#include <stdbool.h>
+
+		#include "Descriptors.h"
+
+		#include <LUFA/Drivers/USB/USB.h>
+		#include <LUFA/Drivers/Board/Joystick.h>
+		#include <LUFA/Drivers/Board/LEDs.h>
+		#include <LUFA/Drivers/Board/Buttons.h>
+		#include <LUFA/Platform/Platform.h>
+
+   /* 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 MIDI_Task(void);
+
+		void EVENT_USB_Device_Connect(void);
+		void EVENT_USB_Device_Disconnect(void);
+		void EVENT_USB_Device_ConfigurationChanged(void);
+
+#endif
+
diff --git a/lib/lufa/Demos/Device/LowLevel/MIDI/MIDI.txt b/lib/lufa/Demos/Device/LowLevel/MIDI/MIDI.txt
new file mode 100644
index 0000000000..97a92a1907
--- /dev/null
+++ b/lib/lufa/Demos/Device/LowLevel/MIDI/MIDI.txt
@@ -0,0 +1,78 @@
+/** \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 MIDI Input Device Demo
+ *
+ *  \section Sec_Compat Demo Compatibility:
+ *
+ *  The following list indicates what microcontrollers are compatible with this demo.
+ *
+ *  \li Series 7 USB AVRs (AT90USBxxx7)
+ *  \li Series 6 USB AVRs (AT90USBxxx6)
+ *  \li Series 4 USB AVRs (ATMEGAxxU4)
+ *  \li Series 2 USB AVRs (AT90USBxx2, ATMEGAxxU2)
+ *  \li Series AU XMEGA AVRs (ATXMEGAxxxAxU)
+ *  \li Series B XMEGA AVRs (ATXMEGAxxxBx)
+ *  \li Series C XMEGA AVRs (ATXMEGAxxxCx)
+ *
+ *  \section Sec_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>
+ *