Add missing Printer.h common class driver file.

LUFA/Drivers/USB/Class/Common/Printer.h

+/*
+             LUFA Library
+     Copyright (C) Dean Camera, 2009.
+              
+  dean [at] fourwalledcubicle [dot] com
+      www.fourwalledcubicle.com
+*/
+
+/*
+  Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+  Permission to use, copy, modify, and distribute this software
+  and its documentation for any purpose and without fee is hereby
+  granted, provided that the above copyright notice appear in all
+  copies and that both that the copyright notice and this
+  permission notice and warranty disclaimer appear in supporting
+  documentation, and that the name of the author not be used in
+  advertising or publicity pertaining to distribution of the
+  software without specific, written prior permission.
+
+  The author disclaim all warranties with regard to this
+  software, including all implied warranties of merchantability
+  and fitness.  In no event shall the author be liable for any
+  special, indirect or consequential damages or any damages
+  whatsoever resulting from loss of use, data or profits, whether
+  in an action of contract, negligence or other tortious action,
+  arising out of or in connection with the use or performance of
+  this software.
+*/
+
+/** \ingroup Group_USBClassMS
+ *  @defgroup Group_USBClassPrinterCommon  Common Class Definitions
+ *
+ *  \section Module Description
+ *  Constants, Types and Enum definitions that are common to both Device and Host modes for the USB
+ *  Printer Class.
+ *
+ *  @{
+ */
+
+#ifndef _PRINTER_CLASS_COMMON_H_
+#define _PRINTER_CLASS_COMMON_H_
+
+	/* Includes: */
+		#include "../../USB.h"
+
+		#include <string.h>
+
+	/* Enable C linkage for C++ Compilers: */
+		#if defined(__cplusplus)
+			extern "C" {
+		#endif
+
+	/* Macros: */
+		/** Port status mask for a printer device, indicating that an error has *not* occurred. */
+		#define PRNT_PORTSTATUS_NOTERROR    (1 << 3)
+
+		/** Port status mask for a printer device, indicating that the device is currently selected. */
+		#define PRNT_PORTSTATUS_SELECT      (1 << 4)
+
+		/** Port status mask for a printer device, indicating that the device is currently out of paper. */
+		#define PRNT_PORTSTATUS_PAPEREMPTY  (1 << 5)
+	
+	/* Disable C linkage for C++ Compilers: */
+		#if defined(__cplusplus)
+			}
+		#endif
+		
+#endif
+
+/** @} */