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+/*
+ 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)
+ Copyright 2012 Simon Foster (simon.foster [at] inbox [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 HD44780.c.
+ */
+
+#ifndef _HD44780_H_
+#define _HD44780_H_
+
+ /* Includes: */
+ #include <avr/io.h>
+ #include <util/delay.h>
+ #include <avr/power.h>
+
+ /* Macros: */
+ #define RS (1 << 4) /* PD4 */
+ #define ENABLE (1 << 7) /* PD7 */
+
+ #define HI4_MASK 0xF0
+ #define LO4_MASK 0x0F /* PD0-PD3 */
+
+ #define ALL_BITS (RS | ENABLE | LO4_MASK)
+
+ #define HI4(c) ((c & HI4_MASK) >> 4)
+ #define LO4(c) ((c & LO4_MASK) >> 0)
+
+ #define CMD_DISPLAY_ON 0x0C
+
+ /* Function Prototypes: */
+ void HD44780_Initialize(void);
+ void HD44780_WriteData(const uint8_t c);
+ void HD44780_WriteCommand(const uint8_t c);
+
+#endif