Squashed 'lib/lufa/' content from commit 385d40300

git-subtree-dir: lib/lufa
git-subtree-split: 385d4030035dbaf41591309dbde47653bd03841b

11 files changed, 3435 insertions, 0 deletions

diff --git a/Demos/Host/LowLevel/PrinterHost/Config/LUFAConfig.h b/Demos/Host/LowLevel/PrinterHost/Config/LUFAConfig.h
new file mode 100644
index 0000000000..197122fce1
--- /dev/null
+++ b/Demos/Host/LowLevel/PrinterHost/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_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      {Insert Value Here}
+//		#define DEVICE_STATE_AS_GPIOR            {Insert Value Here}
+//		#define FIXED_NUM_CONFIGURATIONS         {Insert Value Here}
+//		#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
+
+	#else
+
+		#error Unsupported architecture for this LUFA configuration file.
+
+	#endif
+#endif
diff --git a/Demos/Host/LowLevel/PrinterHost/ConfigDescriptor.c b/Demos/Host/LowLevel/PrinterHost/ConfigDescriptor.c
new file mode 100644
index 0000000000..6e92b1760d
--- /dev/null
+++ b/Demos/Host/LowLevel/PrinterHost/ConfigDescriptor.c
@@ -0,0 +1,177 @@
+/*
+             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.
+*/
+
+#include "ConfigDescriptor.h"
+
+/** Interface number for the bidirectional Printer interface found within the device. */
+uint8_t PrinterInterfaceNumber;
+
+/** Interface Alternate Setting number for the bidirectional Printer interface found within the device. */
+uint8_t PrinterAltSetting;
+
+/** Reads and processes an attached device's descriptors, to determine compatibility and pipe configurations. This
+ *  routine will read in the entire configuration descriptor, and configure the hosts pipes to correctly communicate
+ *  with compatible devices.
+ *
+ *  This routine searches for a bidirectional Printer interface descriptor containing bulk IN and OUT data endpoints.
+ *
+ *  \return An error code from the \ref PrinterHost_GetConfigDescriptorDataCodes_t enum.
+ */
+uint8_t ProcessConfigurationDescriptor(void)
+{
+	uint8_t  ConfigDescriptorData[512];
+	void*    CurrConfigLocation = ConfigDescriptorData;
+	uint16_t CurrConfigBytesRem;
+
+	USB_Descriptor_Interface_t* PrinterInterface = NULL;
+	USB_Descriptor_Endpoint_t*  DataINEndpoint   = NULL;
+	USB_Descriptor_Endpoint_t*  DataOUTEndpoint  = NULL;
+
+	/* Retrieve the entire configuration descriptor into the allocated buffer */
+	switch (USB_Host_GetDeviceConfigDescriptor(1, &CurrConfigBytesRem, ConfigDescriptorData, sizeof(ConfigDescriptorData)))
+	{
+		case HOST_GETCONFIG_Successful:
+			break;
+		case HOST_GETCONFIG_InvalidData:
+			return InvalidConfigDataReturned;
+		case HOST_GETCONFIG_BuffOverflow:
+			return DescriptorTooLarge;
+		default:
+			return ControlError;
+	}
+
+	while (!(DataINEndpoint) || !(DataOUTEndpoint))
+	{
+		/* See if we've found a likely compatible interface, and if there is an endpoint within that interface */
+		if (!(PrinterInterface) ||
+		    USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
+		                              DComp_NextPrinterInterfaceBulkDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
+		{
+			/* Get the next Printer interface from the configuration descriptor */
+			if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
+										  DComp_NextBidirectionalPrinterInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+			{
+				/* Descriptor not found, error out */
+				return NoCompatibleInterfaceFound;
+			}
+
+			/* Save the interface in case we need to refer back to it later */
+			PrinterInterface = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Interface_t);
+
+			/* Clear any found endpoints */
+			DataINEndpoint  = NULL;
+			DataOUTEndpoint = NULL;
+
+			/* Skip the remainder of the loop as we have not found an endpoint yet */
+			continue;
+		}
+
+		/* Retrieve the endpoint address from the endpoint descriptor */
+		USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t);
+
+		/* If the endpoint is a IN type endpoint */
+		if ((EndpointData->EndpointAddress & ENDPOINT_DIR_MASK) == ENDPOINT_DIR_IN)
+		  DataINEndpoint  = EndpointData;
+		else
+		  DataOUTEndpoint = EndpointData;
+	}
+
+	/* Save Printer interface details for later use */
+	PrinterInterfaceNumber = PrinterInterface->InterfaceNumber;
+	PrinterAltSetting      = PrinterInterface->AlternateSetting;
+
+	/* Configure the Printer data IN pipe */
+	Pipe_ConfigurePipe(PRINTER_DATA_IN_PIPE, EP_TYPE_BULK, DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize, 1);
+
+	/* Configure the Printer data OUT pipe */
+	Pipe_ConfigurePipe(PRINTER_DATA_OUT_PIPE, EP_TYPE_BULK, DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize, 1);
+
+	/* Valid data found, return success */
+	return SuccessfulConfigRead;
+}
+
+/** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's
+ *  configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration
+ *  descriptor processing if an incompatible descriptor configuration is found.
+ *
+ *  This comparator searches for the next Bidirectional Printer Interface descriptor of the current Printer interface,
+ *  aborting the search if the end of the descriptors is found.
+ *
+ *  \return A value from the DSEARCH_Return_ErrorCodes_t enum
+ */
+uint8_t DComp_NextBidirectionalPrinterInterface(void* CurrentDescriptor)
+{
+	USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
+
+	if (Header->Type == DTYPE_Interface)
+	{
+		USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t);
+
+		/* Check the descriptor class, subclass and protocol, break out if correct value interface found */
+		if ((Interface->Class    == PRNT_CSCP_PrinterClass)    &&
+		    (Interface->SubClass == PRNT_CSCP_PrinterSubclass) &&
+			(Interface->Protocol == PRNT_CSCP_BidirectionalProtocol))
+		{
+			return DESCRIPTOR_SEARCH_Found;
+		}
+	}
+
+	return DESCRIPTOR_SEARCH_NotFound;
+}
+
+/** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's
+ *  configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration
+ *  descriptor processing if an incompatible descriptor configuration is found.
+ *
+ *  This comparator searches for the next Bulk Endpoint descriptor of the current Printer interface, aborting the
+ *  search if another interface descriptor is found before the next endpoint.
+ *
+ *  \return A value from the DSEARCH_Return_ErrorCodes_t enum
+ */
+uint8_t DComp_NextPrinterInterfaceBulkDataEndpoint(void* CurrentDescriptor)
+{
+	USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t);
+
+	if (Header->Type == DTYPE_Endpoint)
+	{
+		USB_Descriptor_Endpoint_t* Endpoint = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Endpoint_t);
+
+		/* Check the endpoint type, break out if correct BULK type endpoint found */
+		if ((Endpoint->Attributes & EP_TYPE_MASK) == EP_TYPE_BULK)
+		  return DESCRIPTOR_SEARCH_Found;
+	}
+	else if (Header->Type == DTYPE_Interface)
+	{
+		return DESCRIPTOR_SEARCH_Fail;
+	}
+
+	return DESCRIPTOR_SEARCH_NotFound;
+}
+
diff --git a/Demos/Host/LowLevel/PrinterHost/ConfigDescriptor.h b/Demos/Host/LowLevel/PrinterHost/ConfigDescriptor.h
new file mode 100644
index 0000000000..34c7785982
--- /dev/null
+++ b/Demos/Host/LowLevel/PrinterHost/ConfigDescriptor.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.
+*/
+
+#ifndef _CONFIGDESCRIPTOR_H_
+#define _CONFIGDESCRIPTOR_H_
+
+	/* Includes: */
+		#include <LUFA/Drivers/USB/USB.h>
+
+		#include "PrinterHost.h"
+		#include "Lib/PrinterCommands.h"
+
+	/* Macros: */
+		/** Pipe address of the Printer data IN pipe. */
+		#define PRINTER_DATA_IN_PIPE             (PIPE_DIR_IN  | 1)
+
+		/** Pipe address of the Printer data OUT pipe. */
+		#define PRINTER_DATA_OUT_PIPE            (PIPE_DIR_OUT | 2)
+
+	/* Enums: */
+		/** Enum for the possible return codes of the \ref ProcessConfigurationDescriptor() function. */
+		enum PrinterHost_GetConfigDescriptorDataCodes_t
+		{
+			SuccessfulConfigRead            = 0, /**< Configuration Descriptor was processed successfully */
+			ControlError                    = 1, /**< A control request to the device failed to complete successfully */
+			DescriptorTooLarge              = 2, /**< The device's Configuration Descriptor is too large to process */
+			InvalidConfigDataReturned       = 3, /**< The device returned an invalid Configuration Descriptor */
+			NoCompatibleInterfaceFound      = 4, /**< A compatible interface with the required endpoints was not found */
+		};
+
+	/* External Variables: */
+		/** Interface index of the Bidirectional Printer interface within the device, once the Configuration
+		 *  Descriptor has been processed.
+		 */
+		extern uint8_t PrinterInterfaceNumber;
+
+		/** Interface Alternate Setting index of the Bidirectional Printer interface within the device, once
+		 *  the Configuration Descriptor has been processed.
+		 */
+		extern uint8_t PrinterAltSetting;
+
+	/* Function Prototypes: */
+		uint8_t ProcessConfigurationDescriptor(void);
+
+		uint8_t DComp_NextBidirectionalPrinterInterface(void* CurrentDescriptor);
+		uint8_t DComp_NextPrinterInterfaceBulkDataEndpoint(void* CurrentDescriptor);
+
+#endif
+
diff --git a/Demos/Host/LowLevel/PrinterHost/Lib/PrinterCommands.c b/Demos/Host/LowLevel/PrinterHost/Lib/PrinterCommands.c
new file mode 100644
index 0000000000..7507891259
--- /dev/null
+++ b/Demos/Host/LowLevel/PrinterHost/Lib/PrinterCommands.c
@@ -0,0 +1,162 @@
+/*
+             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
+ *
+ *  Printer Device commands, to send/receive data to and from an attached USB
+ *  printer, and to send and receive Printer Class control requests.
+ */
+
+#include "PrinterCommands.h"
+
+/** Sends the given data directly to the printer via the data endpoints, for the sending of print commands in printer
+ *  languages accepted by the attached printer (e.g. PCL).
+ *
+ *  \param[in] PrinterCommands  Pointer to the data to send to the attached printer
+ *  \param[in] CommandSize  Size of the data to send to the attached printer
+ *
+ *  \return A value from the Pipe_Stream_RW_ErrorCodes_t enum
+ */
+uint8_t Printer_SendData(const void* const PrinterCommands,
+                         const uint16_t CommandSize)
+{
+	uint8_t ErrorCode;
+
+	Pipe_SelectPipe(PRINTER_DATA_OUT_PIPE);
+	Pipe_Unfreeze();
+
+	if ((ErrorCode = Pipe_Write_Stream_LE(PrinterCommands, CommandSize, NULL)) != PIPE_RWSTREAM_NoError)
+	  return ErrorCode;
+
+	Pipe_ClearOUT();
+
+	Pipe_WaitUntilReady();
+
+	Pipe_Freeze();
+
+	return PIPE_RWSTREAM_NoError;
+}
+
+/** Issues a Printer class Get Device ID command to the attached device, to retrieve the device ID string (which indicates
+ *  the accepted printer languages, the printer's model and other pertinent information).
+ *
+ *  \param[out] DeviceIDString Pointer to the destination where the returned string should be stored
+ *  \param[in] BufferSize  Size in bytes of the allocated buffer for the returned Device ID string
+ *
+ *  \return A value from the USB_Host_SendControlErrorCodes_t enum
+ */
+uint8_t Printer_GetDeviceID(char* DeviceIDString,
+                            const uint16_t BufferSize)
+{
+	uint8_t  ErrorCode;
+	uint16_t DeviceIDStringLength = 0;
+
+	USB_ControlRequest = (USB_Request_Header_t)
+		{
+			.bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
+			.bRequest      = PRNT_REQ_GetDeviceID,
+			.wValue        = 0,
+			.wIndex        = PrinterInterfaceNumber,
+			.wLength       = sizeof(DeviceIDStringLength),
+		};
+
+	Pipe_SelectPipe(PIPE_CONTROLPIPE);
+
+	if ((ErrorCode = USB_Host_SendControlRequest(&DeviceIDStringLength)) != HOST_SENDCONTROL_Successful)
+	  return ErrorCode;
+
+	if (!(DeviceIDStringLength))
+	{
+		DeviceIDString[0] = 0x00;
+		return HOST_SENDCONTROL_Successful;
+	}
+
+	DeviceIDStringLength = SwapEndian_16(DeviceIDStringLength);
+
+	if (DeviceIDStringLength > BufferSize)
+	  DeviceIDStringLength = BufferSize;
+
+	USB_ControlRequest.wLength = DeviceIDStringLength;
+
+	if ((ErrorCode = USB_Host_SendControlRequest(DeviceIDString)) != HOST_SENDCONTROL_Successful)
+	  return ErrorCode;
+
+	/* Move string back two characters to remove the string length value from the start of the array */
+	memmove(&DeviceIDString[0], &DeviceIDString[2], DeviceIDStringLength - 2);
+
+	DeviceIDString[DeviceIDStringLength - 2] = 0x00;
+
+	return HOST_SENDCONTROL_Successful;
+}
+
+/** Issues a Printer class Get Port Status command to the attached device, to retrieve the current status flags of the
+ *  printer.
+ *
+ *  \param[out] PortStatus  Pointer to the destination where the printer's status flag values should be stored
+ *
+ *  \return A value from the USB_Host_SendControlErrorCodes_t enum
+ */
+uint8_t Printer_GetPortStatus(uint8_t* const PortStatus)
+{
+	USB_ControlRequest = (USB_Request_Header_t)
+		{
+			.bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE),
+			.bRequest      = PRNT_REQ_GetPortStatus,
+			.wValue        = 0,
+			.wIndex        = PrinterInterfaceNumber,
+			.wLength       = sizeof(uint8_t),
+		};
+
+	Pipe_SelectPipe(PIPE_CONTROLPIPE);
+
+	return USB_Host_SendControlRequest(PortStatus);
+}
+
+/** Issues a Printer class Soft Reset command to the attached device, to reset the printer ready for new input without
+ *  physically cycling the printer's power.
+ *
+ *  \return A value from the USB_Host_SendControlErrorCodes_t enum
+ */
+uint8_t Printer_SoftReset(void)
+{
+	USB_ControlRequest = (USB_Request_Header_t)
+		{
+			.bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_CLASS | REQREC_INTERFACE),
+			.bRequest      = PRNT_REQ_SoftReset,
+			.wValue        = 0,
+			.wIndex        = PrinterInterfaceNumber,
+			.wLength       = 0,
+		};
+
+	Pipe_SelectPipe(PIPE_CONTROLPIPE);
+
+	return USB_Host_SendControlRequest(NULL);
+}
+
diff --git a/Demos/Host/LowLevel/PrinterHost/Lib/PrinterCommands.h b/Demos/Host/LowLevel/PrinterHost/Lib/PrinterCommands.h
new file mode 100644
index 0000000000..f29b18e454
--- /dev/null
+++ b/Demos/Host/LowLevel/PrinterHost/Lib/PrinterCommands.h
@@ -0,0 +1,56 @@
+/*
+             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 PrinterCommands.c.
+ */
+
+#ifndef _PRINTER_COMMANDS_H_
+#define _PRINTER_COMMANDS_H_
+
+	/* Includes: */
+		#include <avr/io.h>
+		#include <string.h>
+
+		#include <LUFA/Drivers/USB/USB.h>
+
+		#include "../PrinterHost.h"
+
+	/* Function Prototypes: */
+		uint8_t Printer_SendData(const void* const PrinterCommands,
+		                         const uint16_t CommandSize);
+		uint8_t Printer_GetDeviceID(char* DeviceIDString,
+		                            const uint16_t BufferSize);
+		uint8_t Printer_GetPortStatus(uint8_t* const PortStatus);
+		uint8_t Printer_SoftReset(void);
+
+#endif
+
diff --git a/Demos/Host/LowLevel/PrinterHost/PrinterHost.c b/Demos/Host/LowLevel/PrinterHost/PrinterHost.c
new file mode 100644
index 0000000000..44e8f12743
--- /dev/null
+++ b/Demos/Host/LowLevel/PrinterHost/PrinterHost.c
@@ -0,0 +1,226 @@
+/*
+             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 PrinterHost demo. This file contains the main tasks of
+ *  the demo and is responsible for the initial application hardware configuration.
+ */
+
+#include "PrinterHost.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();
+
+	puts_P(PSTR(ESC_FG_CYAN "Printer Host Demo running.\r\n" ESC_FG_WHITE));
+
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+	GlobalInterruptEnable();
+
+	for (;;)
+	{
+		PrinterHost_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);
+#endif
+
+	/* Hardware Initialization */
+	Serial_Init(9600, false);
+	LEDs_Init();
+	USB_Init();
+
+	/* Create a stdio stream for the serial port for stdin and stdout */
+	Serial_CreateStream(NULL);
+}
+
+/** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
+ *  starts the library USB task to begin the enumeration and USB management process.
+ */
+void EVENT_USB_Host_DeviceAttached(void)
+{
+	puts_P(PSTR(ESC_FG_GREEN "Device Attached.\r\n" ESC_FG_WHITE));
+	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
+}
+
+/** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
+ *  stops the library USB task management process.
+ */
+void EVENT_USB_Host_DeviceUnattached(void)
+{
+	puts_P(PSTR(ESC_FG_GREEN "\r\nDevice Unattached.\r\n" ESC_FG_WHITE));
+	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
+}
+
+/** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
+ *  enumerated by the host and is now ready to be used by the application.
+ */
+void EVENT_USB_Host_DeviceEnumerationComplete(void)
+{
+	puts_P(PSTR("Getting Config Data.\r\n"));
+
+	uint8_t ErrorCode;
+
+	/* Get and process the configuration descriptor data */
+	if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
+	{
+		if (ErrorCode == ControlError)
+		  puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
+		else
+		  puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));
+
+		printf_P(PSTR(" -- Error Code: %d\r\n"), ErrorCode);
+
+		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+		return;
+	}
+
+	/* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
+	if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
+	{
+		printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
+		                         " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
+
+		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+		return;
+	}
+
+	/* Some printers use alternate settings to determine the communication protocol used - if so, send a SetInterface
+	 * request to switch to the interface alternate setting with the Bidirectional protocol */
+	if (PrinterAltSetting)
+	{
+		if ((ErrorCode = USB_Host_SetInterfaceAltSetting(PrinterInterfaceNumber, PrinterAltSetting)) != HOST_SENDCONTROL_Successful)
+		{
+			printf_P(PSTR(ESC_FG_RED "Control Error (Set Interface).\r\n"
+			                         " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
+
+			LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+			USB_Host_SetDeviceConfiguration(0);
+			return;
+		}
+	}
+
+	puts_P(PSTR("Retrieving Device ID...\r\n"));
+
+	char DeviceIDString[300];
+	if ((ErrorCode = Printer_GetDeviceID(DeviceIDString, sizeof(DeviceIDString))) != HOST_SENDCONTROL_Successful)
+	{
+		printf_P(PSTR(ESC_FG_RED "Control Error (Get Device ID).\r\n"
+		                         " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
+
+		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+		USB_Host_SetDeviceConfiguration(0);
+		return;
+	}
+
+	printf_P(PSTR("Printer Device ID: %s\r\n"), DeviceIDString);
+
+	puts_P(PSTR("Printer Enumerated.\r\n"));
+	LEDs_SetAllLEDs(LEDMASK_USB_READY);
+}
+
+/** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
+void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
+{
+	USB_Disable();
+
+	printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
+	                         " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);
+
+	LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+	for(;;);
+}
+
+/** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
+ *  enumerating an attached USB device.
+ */
+void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
+                                            const uint8_t SubErrorCode)
+{
+	printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
+	                         " -- Error Code %d\r\n"
+	                         " -- Sub Error Code %d\r\n"
+	                         " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
+
+	LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+}
+
+/** Task to manage an enumerated USB printer once connected, to display device
+ *  information and print a test PCL page.
+ */
+void PrinterHost_Task(void)
+{
+	if (USB_HostState != HOST_STATE_Configured)
+	  return;
+
+	uint8_t ErrorCode;
+
+	/* Indicate device busy via the status LEDs */
+	LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
+
+	char  TestPageData[]    = "\033%-12345X\033E" "LUFA PCL Test Page" "\033E\033%-12345X";
+	uint16_t TestPageLength = strlen(TestPageData);
+
+	printf_P(PSTR("Sending Test Page (%d bytes)...\r\n"), TestPageLength);
+
+	/* Send the test page to the attached printer */
+	if ((ErrorCode = Printer_SendData(&TestPageData, TestPageLength)) != PIPE_RWSTREAM_NoError)
+	{
+		printf_P(PSTR(ESC_FG_RED "Error Sending Test Page.\r\n"
+		                         " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
+
+		LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
+		USB_Host_SetDeviceConfiguration(0);
+		return;
+	}
+
+	puts_P(PSTR("Test Page Sent.\r\n"));
+
+	/* Indicate device no longer busy */
+	LEDs_SetAllLEDs(LEDMASK_USB_READY);
+	USB_Host_SetDeviceConfiguration(0);
+}
+
diff --git a/Demos/Host/LowLevel/PrinterHost/PrinterHost.h b/Demos/Host/LowLevel/PrinterHost/PrinterHost.h
new file mode 100644
index 0000000000..c1daa6247e
--- /dev/null
+++ b/Demos/Host/LowLevel/PrinterHost/PrinterHost.h
@@ -0,0 +1,88 @@
+/*
+             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 PrinterHost.c.
+ */
+
+#ifndef _MASS_STORE_HOST_H_
+#define _MASS_STORE_HOST_H_
+
+	/* Includes: */
+		#include <avr/io.h>
+		#include <avr/wdt.h>
+		#include <avr/pgmspace.h>
+		#include <avr/power.h>
+		#include <avr/interrupt.h>
+		#include <stdio.h>
+		#include <string.h>
+
+		#include "ConfigDescriptor.h"
+		#include "Lib/PrinterCommands.h"
+
+		#include <LUFA/Drivers/Misc/TerminalCodes.h>
+		#include <LUFA/Drivers/USB/USB.h>
+		#include <LUFA/Drivers/Peripheral/Serial.h>
+		#include <LUFA/Drivers/Board/LEDs.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)
+
+		/** LED mask for the library LED driver, to indicate that the USB interface is busy. */
+		#define LEDMASK_USB_BUSY          LEDS_LED2
+
+	/* External Variables: */
+		extern uint8_t PrinterInterfaceNumber;
+
+	/* Function Prototypes: */
+		void SetupHardware(void);
+		void PrinterHost_Task(void);
+
+		void EVENT_USB_Host_DeviceAttached(void);
+		void EVENT_USB_Host_DeviceUnattached(void);
+		void EVENT_USB_Host_DeviceEnumerationComplete(void);
+		void EVENT_USB_Host_HostError(const uint8_t ErrorCode);
+		void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
+		                                            const uint8_t SubErrorCode);
+
+#endif
+
diff --git a/Demos/Host/LowLevel/PrinterHost/PrinterHost.