Projects/SerialToLCD/Lib/HD44780.h

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2021.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2021  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11   Copyright 2012  Simon Foster (simon.foster [at] inbox [dot] com)
  12
  13   Permission to use, copy, modify, distribute, and sell this
  14   software and its documentation for any purpose is hereby granted
  15   without fee, provided that the above copyright notice appear in
  16   all copies and that both that the copyright notice and this
  17   permission notice and warranty disclaimer appear in supporting
  18   documentation, and that the name of the author not be used in
  19   advertising or publicity pertaining to distribution of the
  20   software without specific, written prior permission.
  21
  22   The author disclaims all warranties with regard to this
  23   software, including all implied warranties of merchantability
  24   and fitness.  In no event shall the author be liable for any
  25   special, indirect or consequential damages or any damages
  26   whatsoever resulting from loss of use, data or profits, whether
  27   in an action of contract, negligence or other tortious action,
  28   arising out of or in connection with the use or performance of
  29   this software.
  30 */
  31
  32 /** \file
  33  *
  34  *  Header file for HD44780.c.
  35  */
  36
  37 #ifndef _HD44780_H_
  38 #define _HD44780_H_
  39
  40         /* Includes: */
  41                 #include <avr/io.h>
  42                 #include <util/delay.h>
  43                 #include <avr/power.h>
  44
  45         /* Macros: */
  46                 #define RS                  (1 << 4)    /* PD4 */
  47                 #define ENABLE              (1 << 7)    /* PD7 */
  48
  49                 #define HI4_MASK            0xF0
  50                 #define LO4_MASK            0x0F        /* PD0-PD3 */
  51
  52                 #define ALL_BITS            (RS | ENABLE | LO4_MASK)
  53
  54                 #define HI4(c)              ((c & HI4_MASK) >> 4)
  55                 #define LO4(c)              ((c & LO4_MASK) >> 0)
  56
  57                 #define CMD_DISPLAY_ON      0x0C
  58
  59         /* Function Prototypes: */
  60                 void HD44780_Initialize(void);
  61                 void HD44780_WriteData(const uint8_t c);
  62                 void HD44780_WriteCommand(const uint8_t c);
  63
  64 #endif