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

10 files changed, 3412 insertions, 0 deletions

diff --git a/lib/lufa/Projects/USBtoSerial/Config/LUFAConfig.h b/lib/lufa/Projects/USBtoSerial/Config/LUFAConfig.h
new file mode 100644
index 0000000000..f7d7e62708
--- /dev/null
+++ b/lib/lufa/Projects/USBtoSerial/Config/LUFAConfig.h
@@ -0,0 +1,93 @@
+/*
+             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            0
+		#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              0
+//		#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
+
+	#else
+
+		#error Unsupported architecture for this LUFA configuration file.
+
+	#endif
+#endif
diff --git a/lib/lufa/Projects/USBtoSerial/Descriptors.c b/lib/lufa/Projects/USBtoSerial/Descriptors.c
new file mode 100644
index 0000000000..982703707f
--- /dev/null
+++ b/lib/lufa/Projects/USBtoSerial/Descriptors.c
@@ -0,0 +1,245 @@
+/*
+             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                  = CDC_CSCP_CDCClass,
+	.SubClass               = CDC_CSCP_NoSpecificSubclass,
+	.Protocol               = CDC_CSCP_NoSpecificProtocol,
+
+	.Endpoint0Size          = FIXED_CONTROL_ENDPOINT_SIZE,
+
+	.VendorID               = 0x03EB,
+	.ProductID              = 0x204B,
+	.ReleaseNumber          = VERSION_BCD(0,0,1),
+
+	.ManufacturerStrIndex   = STRING_ID_Manufacturer,
+	.ProductStrIndex        = STRING_ID_Product,
+	.SerialNumStrIndex      = USE_INTERNAL_SERIAL,
+
+	.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)
+		},
+
+	.CDC_CCI_Interface =
+		{
+			.Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
+
+			.InterfaceNumber        = INTERFACE_ID_CDC_CCI,
+			.AlternateSetting       = 0,
+
+			.TotalEndpoints         = 1,
+
+			.Class                  = CDC_CSCP_CDCClass,
+			.SubClass               = CDC_CSCP_ACMSubclass,
+			.Protocol               = CDC_CSCP_ATCommandProtocol,
+
+			.InterfaceStrIndex      = NO_DESCRIPTOR
+		},
+
+	.CDC_Functional_Header =
+		{
+			.Header                 = {.Size = sizeof(USB_CDC_Descriptor_FunctionalHeader_t), .Type = DTYPE_CSInterface},
+			.Subtype                = CDC_DSUBTYPE_CSInterface_Header,
+
+			.CDCSpecification       = VERSION_BCD(1,1,0),
+		},
+
+	.CDC_Functional_ACM =
+		{
+			.Header                 = {.Size = sizeof(USB_CDC_Descriptor_FunctionalACM_t), .Type = DTYPE_CSInterface},
+			.Subtype                = CDC_DSUBTYPE_CSInterface_ACM,
+
+			.Capabilities           = 0x06,
+		},
+
+	.CDC_Functional_Union =
+		{
+			.Header                 = {.Size = sizeof(USB_CDC_Descriptor_FunctionalUnion_t), .Type = DTYPE_CSInterface},
+			.Subtype                = CDC_DSUBTYPE_CSInterface_Union,
+
+			.MasterInterfaceNumber  = INTERFACE_ID_CDC_CCI,
+			.SlaveInterfaceNumber   = INTERFACE_ID_CDC_DCI,
+		},
+
+	.CDC_NotificationEndpoint =
+		{
+			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
+
+			.EndpointAddress        = CDC_NOTIFICATION_EPADDR,
+			.Attributes             = (EP_TYPE_INTERRUPT | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
+			.EndpointSize           = CDC_NOTIFICATION_EPSIZE,
+			.PollingIntervalMS      = 0xFF
+		},
+
+	.CDC_DCI_Interface =
+		{
+			.Header                 = {.Size = sizeof(USB_Descriptor_Interface_t), .Type = DTYPE_Interface},
+
+			.InterfaceNumber        = INTERFACE_ID_CDC_DCI,
+			.AlternateSetting       = 0,
+
+			.TotalEndpoints         = 2,
+
+			.Class                  = CDC_CSCP_CDCDataClass,
+			.SubClass               = CDC_CSCP_NoDataSubclass,
+			.Protocol               = CDC_CSCP_NoDataProtocol,
+
+			.InterfaceStrIndex      = NO_DESCRIPTOR
+		},
+
+	.CDC_DataOutEndpoint =
+		{
+			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
+
+			.EndpointAddress        = CDC_RX_EPADDR,
+			.Attributes             = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
+			.EndpointSize           = CDC_TXRX_EPSIZE,
+			.PollingIntervalMS      = 0x05
+		},
+
+	.CDC_DataInEndpoint =
+		{
+			.Header                 = {.Size = sizeof(USB_Descriptor_Endpoint_t), .Type = DTYPE_Endpoint},
+
+			.EndpointAddress        = CDC_TX_EPADDR,
+			.Attributes             = (EP_TYPE_BULK | ENDPOINT_ATTR_NO_SYNC | ENDPOINT_USAGE_DATA),
+			.EndpointSize           = CDC_TXRX_EPSIZE,
+			.PollingIntervalMS      = 0x05
+		}
+};
+
+/** 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 USB-RS232 Adapter");
+
+/** 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/Projects/USBtoSerial/Descriptors.h b/lib/lufa/Projects/USBtoSerial/Descriptors.h
new file mode 100644
index 0000000000..b19682a2b6
--- /dev/null
+++ b/lib/lufa/Projects/USBtoSerial/Descriptors.h
@@ -0,0 +1,110 @@
+/*
+             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 <avr/pgmspace.h>
+
+		#include <LUFA/Drivers/USB/USB.h>
+
+	/* Macros: */
+		/** Endpoint address of the CDC device-to-host notification IN endpoint. */
+		#define CDC_NOTIFICATION_EPADDR        (ENDPOINT_DIR_IN  | 2)
+
+		/** Endpoint address of the CDC device-to-host data IN endpoint. */
+		#define CDC_TX_EPADDR                  (ENDPOINT_DIR_IN  | 3)
+
+		/** Endpoint address of the CDC host-to-device data OUT endpoint. */
+		#define CDC_RX_EPADDR                  (ENDPOINT_DIR_OUT | 4)
+
+		/** Size in bytes of the CDC device-to-host notification IN endpoint. */
+		#define CDC_NOTIFICATION_EPSIZE        8
+
+		/** Size in bytes of the CDC data IN and OUT endpoints. */
+		#define CDC_TXRX_EPSIZE                16
+
+	/* 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;
+
+			// CDC Command Interface
+			USB_Descriptor_Interface_t               CDC_CCI_Interface;
+			USB_CDC_Descriptor_FunctionalHeader_t    CDC_Functional_Header;
+			USB_CDC_Descriptor_FunctionalACM_t       CDC_Functional_ACM;
+			USB_CDC_Descriptor_FunctionalUnion_t     CDC_Functional_Union;
+			USB_Descriptor_Endpoint_t                CDC_NotificationEndpoint;
+
+			// CDC Data Interface
+			USB_Descriptor_Interface_t               CDC_DCI_Interface;
+			USB_Descriptor_Endpoint_t                CDC_DataOutEndpoint;
+			USB_Descriptor_Endpoint_t                CDC_DataInEndpoint;
+		} 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_CDC_CCI = 0, /**< CDC CCI interface descriptor ID */
+			INTERFACE_ID_CDC_DCI = 1, /**< CDC DCI 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/Projects/USBtoSerial/LUFA USBtoSerial.inf b/lib/lufa/Projects/USBtoSerial/LUFA USBtoSerial.inf
new file mode 100644
index 0000000000..b00fab6a44
--- /dev/null
+++ b/lib/lufa/Projects/USBtoSerial/LUFA USBtoSerial.inf
@@ -0,0 +1,66 @@
+;************************************************************
+; Windows USB CDC ACM Setup File
+; Copyright (c) 2000 Microsoft Corporation
+;************************************************************
+
+[DefaultInstall]
+CopyINF="LUFA USBtoSerial.inf"
+
+[Version]
+Signature="$Windows NT$"
+Class=Ports
+ClassGuid={4D36E978-E325-11CE-BFC1-08002BE10318}
+Provider=%MFGNAME%
+DriverVer=7/1/2012,10.0.0.0
+
+[Manufacturer]
+%MFGNAME%=DeviceList, NTx86, NTamd64, NTia64
+
+[SourceDisksNames]
+
+[SourceDisksFiles]
+
+[DestinationDirs]
+DefaultDestDir=12
+
+[DriverInstall]
+Include=mdmcpq.inf
+CopyFiles=FakeModemCopyFileSection
+AddReg=DriverInstall.AddReg
+
+[DriverInstall.Services]
+Include=mdmcpq.inf
+AddService=usbser, 0x00000002, LowerFilter_Service_Inst
+
+[DriverInstall.AddReg]
+HKR,,EnumPropPages32,,"msports.dll,SerialPortPropPageProvider"
+
+;------------------------------------------------------------------------------
+;  Vendor and Product ID Definitions
+;------------------------------------------------------------------------------
+; When developing your USB device, the VID and PID used in the PC side
+; application program and the firmware on the microcontroller must match.
+; Modify the below line to use your VID and PID.  Use the format as shown below.
+; Note: One INF file can be used for multiple devices with different VID and PIDs.
+; For each supported device, append ",USB\VID_xxxx&PID_yyyy" to the end of the line.
+;------------------------------------------------------------------------------
+[DeviceList]
+%DESCRIPTION%=DriverInstall, USB\VID_03EB&PID_204B
+
+[DeviceList.NTx86]
+%DESCRIPTION%=DriverInstall, USB\VID_03EB&PID_204B
+
+[DeviceList.NTamd64]
+%DESCRIPTION%=DriverInstall, USB\VID_03EB&PID_204B
+
+[DeviceList.NTia64]
+%DESCRIPTION%=DriverInstall, USB\VID_03EB&PID_204B
+
+;------------------------------------------------------------------------------
+;  String Definitions
+;------------------------------------------------------------------------------
+;Modify these strings to customize your device
+;------------------------------------------------------------------------------
+[Strings]
+MFGNAME="http://www.lufa-lib.org"
+DESCRIPTION="LUFA USB to Serial"
\ No newline at end of file
diff --git a/lib/lufa/Projects/USBtoSerial/USBtoSerial.c b/lib/lufa/Projects/USBtoSerial/USBtoSerial.c
new file mode 100644
index 0000000000..47a84a4ada
--- /dev/null
+++ b/lib/lufa/Projects/USBtoSerial/USBtoSerial.c
@@ -0,0 +1,254 @@
+/*
+             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 USBtoSerial project. This file contains the main tasks of
+ *  the project and is responsible for the initial application hardware configuration.
+ */
+
+#include "USBtoSerial.h"
+
+/** Circular buffer to hold data from the host before it is sent to the device via the serial port. */
+static RingBuffer_t USBtoUSART_Buffer;
+
+/** Underlying data buffer for \ref USBtoUSART_Buffer, where the stored bytes are located. */
+static uint8_t      USBtoUSART_Buffer_Data[128];
+
+/** Circular buffer to hold data from the serial port before it is sent to the host. */
+static RingBuffer_t USARTtoUSB_Buffer;
+
+/** Underlying data buffer for \ref USARTtoUSB_Buffer, where the stored bytes are located. */
+static uint8_t      USARTtoUSB_Buffer_Data[128];
+
+/** LUFA CDC Class driver interface configuration and state information. This structure is
+ *  passed to all CDC Class driver functions, so that multiple instances of the same class
+ *  within a device can be differentiated from one another.
+ */
+USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
+	{
+		.Config =
+			{
+				.ControlInterfaceNumber         = INTERFACE_ID_CDC_CCI,
+				.DataINEndpoint                 =
+					{
+						.Address                = CDC_TX_EPADDR,
+						.Size                   = CDC_TXRX_EPSIZE,
+						.Banks                  = 1,
+					},
+				.DataOUTEndpoint                =
+					{
+						.Address                = CDC_RX_EPADDR,
+						.Size                   = CDC_TXRX_EPSIZE,
+						.Banks                  = 1,
+					},
+				.NotificationEndpoint           =
+					{
+						.Address                = CDC_NOTIFICATION_EPADDR,
+						.Size                   = CDC_NOTIFICATION_EPSIZE,
+						.Banks                  = 1,
+					},
+			},
+	};
+
+
+/** 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();
+
+	RingBuffer_InitBuffer(&USBtoUSART_Buffer, USBtoUSART_Buffer_Data, sizeof(USBtoUSART_Buffer_Data));
+	RingBuffer_InitBuffer(&USARTtoUSB_Buffer, USARTtoUSB_Buffer_Data, sizeof(USARTtoUSB_Buffer_Data));
+
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+	GlobalInterruptEnable();
+
+	for (;;)
+	{
+		/* Only try to read in bytes from the CDC interface if the transmit buffer is not full */
+		if (!(RingBuffer_IsFull(&USBtoUSART_Buffer)))
+		{
+			int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
+
+			/* Store received byte into the USART transmit buffer */
+			if (!(ReceivedByte < 0))
+			  RingBuffer_Insert(&USBtoUSART_Buffer, ReceivedByte);
+		}
+
+		uint16_t BufferCount = RingBuffer_GetCount(&USARTtoUSB_Buffer);
+		if (BufferCount)
+		{
+			Endpoint_SelectEndpoint(VirtualSerial_CDC_Interface.Config.DataINEndpoint.Address);
+
+			/* Check if a packet is already enqueued to the host - if so, we shouldn't try to send more data
+			 * until it completes as there is a chance nothing is listening and a lengthy timeout could occur */
+			if (Endpoint_IsINReady())
+			{
+				/* Never send more than one bank size less one byte to the host at a time, so that we don't block
+				 * while a Zero Length Packet (ZLP) to terminate the transfer is sent if the host isn't listening */
+				uint8_t BytesToSend = MIN(BufferCount, (CDC_TXRX_EPSIZE - 1));
+
+				/* Read bytes from the USART receive buffer into the USB IN endpoint */
+				while (BytesToSend--)
+				{
+					/* Try to send the next byte of data to the host, abort if there is an error without dequeuing */
+					if (CDC_Device_SendByte(&VirtualSerial_CDC_Interface,
+											RingBuffer_Peek(&USARTtoUSB_Buffer)) != ENDPOINT_READYWAIT_NoError)
+					{
+						break;
+					}
+
+					/* Dequeue the already sent byte from the buffer now we have confirmed that no transmission error occurred */
+					RingBuffer_Remove(&USARTtoUSB_Buffer);
+				}
+			}
+		}
+
+		/* Load the next byte from the USART transmit buffer into the USART if transmit buffer space is available */
+		if (Serial_IsSendReady() && !(RingBuffer_IsEmpty(&USBtoUSART_Buffer)))
+		  Serial_SendByte(RingBuffer_Remove(&USBtoUSART_Buffer));
+
+		CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
+		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);
+#endif
+
+	/* Hardware Initialization */
+	LEDs_Init();
+	USB_Init();
+}
+
+/** Event handler for the library USB Connection event. */
+void EVENT_USB_Device_Connect(void)
+{
+	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
+}
+
+/** Event handler for the library USB Disconnection event. */
+void EVENT_USB_Device_Disconnect(void)
+{
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+}
+
+/** Event handler for the library USB Configuration Changed event. */
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+	bool ConfigSuccess = true;
+
+	ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
+
+	LEDs_SetAllLEDs(ConfigSuccess ? LEDMASK_USB_READY : LEDMASK_USB_ERROR);
+}
+
+/** Event handler for the library USB Control Request reception event. */
+void EVENT_USB_Device_ControlRequest(void)
+{
+	CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
+}
+
+/** ISR to manage the reception of data from the serial port, placing received bytes into a circular buffer
+ *  for later transmission to the host.
+ */
+ISR(USART1_RX_vect, ISR_BLOCK)
+{
+	uint8_t ReceivedByte = UDR1;
+
+	if ((USB_DeviceState == DEVICE_STATE_Configured) && !(RingBuffer_IsFull(&USARTtoUSB_Buffer)))
+	  RingBuffer_Insert(&USARTtoUSB_Buffer, ReceivedByte);
+}
+
+/** Event handler for the CDC Class driver Line Encoding Changed event.
+ *
+ *  \param[in] CDCInterfaceInfo  Pointer to the CDC class interface configuration structure being referenced
+ */
+void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
+{
+	uint8_t ConfigMask = 0;
+
+	switch (CDCInterfaceInfo->State.LineEncoding.ParityType)
+	{
+		case CDC_PARITY_Odd:
+			ConfigMask = ((1 << UPM11) | (1 << UPM10));
+			break;
+		case CDC_PARITY_Even:
+			ConfigMask = (1 << UPM11);
+			break;
+	}
+
+	if (CDCInterfaceInfo->State.LineEncoding.CharFormat == CDC_LINEENCODING_TwoStopBits)
+	  ConfigMask |= (1 << USBS1);
+
+	switch (CDCInterfaceInfo->State.LineEncoding.DataBits)
+	{
+		case 6:
+			ConfigMask |= (1 << UCSZ10);
+			break;
+		case 7:
+			ConfigMask |= (1 << UCSZ11);
+			break;
+		case 8:
+			ConfigMask |= ((1 << UCSZ11) | (1 << UCSZ10));
+			break;
+	}
+
+	/* Keep the TX line held high (idle) while the USART is reconfigured */
+	PORTD |= (1 << 3);
+
+	/* Must turn off USART before reconfiguring it, otherwise incorrect operation may occur */
+	UCSR1B = 0;
+	UCSR1A = 0;
+	UCSR1C = 0;
+
+	/* Set the new baud rate before configuring the USART */
+	UBRR1  = SERIAL_2X_UBBRVAL(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS);
+
+	/* Reconfigure the USART in double speed mode for a wider baud rate range at the expense of accuracy */
+	UCSR1C = ConfigMask;
+	UCSR1A = (1 << U2X1);
+	UCSR1B = ((1 << RXCIE1) | (1 << TXEN1) | (1 << RXEN1));
+
+	/* Release the TX line after the USART has been reconfigured */
+	PORTD &= ~(1 << 3);
+}
+
diff --git a/lib/lufa/Projects/USBtoSerial/USBtoSerial.h b/lib/lufa/Projects/USBtoSerial/USBtoSerial.h
new file mode 100644
index 0000000000..ed6880baf0
--- /dev/null
+++ b/lib/lufa/Projects/USBtoSerial/USBtoSerial.h
@@ -0,0 +1,77 @@
+/*
+             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 USBtoSerial.c.
+ */
+
+#ifndef _USB_SERIAL_H_
+#define _USB_SERIAL_H_
+
+	/* Includes: */
+		#include <avr/io.h>
+		#include <avr/wdt.h>
+		#include <avr/interrupt.h>
+		#include <avr/power.h>
+
+		#include "Descriptors.h"
+
+		#include <LUFA/Drivers/Board/LEDs.h>
+		#include <LUFA/Drivers/Peripheral/Serial.h>
+		#include <LUFA/Drivers/Misc/RingBuffer.h>
+		#include <LUFA/Drivers/USB/USB.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 EVENT_USB_Device_Connect(void);
+		void EVENT_USB_Device_Disconnect(void);
+		void EVENT_USB_Device_ConfigurationChanged(void);
+		void EVENT_USB_Device_ControlRequest(void);
+
+		void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo);
+
+#endif
+
diff --git a/lib/lufa/Projects/USBtoSerial/USBtoSerial.txt b/lib/lufa/Projects/USBtoSerial/USBtoSerial.txt
new file mode 100644
index 0000000000..0620f93938
--- /dev/null
+++ b/lib/lufa/Projects/USBtoSerial/USBtoSerial.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 USB to Serial Converter Project
+ *
+ *  \section Sec_Compat Project Compatibility:
+ *
+ *  The following list indicates what microcontrollers are compatible with this project.
+ *
+ *  \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)
+ *
+ *  \section Sec_Info USB Information:
+ *
+ *  The following table gives a rundown of the USB utilization of this project.
+ *
+ *  <table>
+ *   <tr>
+ *    <td><b>USB Mode:</b></td>
+ *    <td>Device</td>
+ *   </tr>
+ *   <tr>
+ *    <td><b>USB Class:</b></td>
+ *    <td>Communications Device Class (CDC)</td>
+ *   </tr>
+ *   <tr>
+ *    <td><b>USB Subclass:</b></td>
+ *    <td>Abstract Control Model (ACM)</td>
+ *   </tr>
+ *   <tr>
+ *    <td><b>Relevant Standards:</b>&