4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2003, 2004, 2005, 2008 Develer S.r.l. (http://www.develer.com/)
30 * Copyright 2001 Bernie Innocenti <bernie@codewiz.org>
34 * \brief LCD low-level hardware macros
36 * \author Bernie Innocenti <bernie@codewiz.org>
37 * \author Stefano Fedrigo <aleph@develer.com>
44 #include "cfg/cfg_lcd_hd44.h" /* CONFIG_LCD_4BIT */
46 #include <cpu/types.h>
49 #warning TODO:This is an example implementation, you must implement it!
52 * \name LCD I/O pins/ports
55 #define LCD_RS /* Implement me! */
56 #define LCD_RW /* Implement me! */
57 #define LCD_E /* Implement me! */
58 #define LCD_DB0 /* Implement me! */
59 #define LCD_DB1 /* Implement me! */
60 #define LCD_DB2 /* Implement me! */
61 #define LCD_DB3 /* Implement me! */
62 #define LCD_DB4 /* Implement me! */
63 #define LCD_DB5 /* Implement me! */
64 #define LCD_DB6 /* Implement me! */
65 #define LCD_DB7 /* Implement me! */
69 * \name DB high nibble (DB[4-7])
74 #define LCD_MASK (LCD_DB7 | LCD_DB6 | LCD_DB5 | LCD_DB4)
77 #define LCD_MASK (uint8_t)0xff
83 * \name LCD bus control macros
86 #define LCD_CLR_RS /* Implement me! */
87 #define LCD_SET_RS /* Implement me! */
88 #define LCD_CLR_RD /* Implement me! */
89 #define LCD_SET_RD /* Implement me! */
90 #define LCD_CLR_E /* Implement me! */
91 #define LCD_SET_E /* Implement me! */
93 /* Enter command mode */
94 #define LCD_SET_COMMAND() /* Implement me! */
97 #define LCD_SET_DATA() /* Implement me! */
100 #define LCD_WRITE_H(x) ((void)x)/* Implement me! */
101 #define LCD_WRITE_L(x) ((void)x)/* Implement me! */
102 #define LCD_READ_H ( 0 /* Implement me! */ )
103 #define LCD_READ_L ( 0 /* Implement me! */ )
105 #define LCD_WRITE(x) ((void)x)/* Implement me! */
106 #define LCD_READ (0 /* Implement me! */ )
110 /** Set data bus direction to output (write to display) */
111 #define LCD_DB_OUT /* Implement me! */
113 /** Set data bus direction to input (read from display) */
114 #define LCD_DB_IN /* Implement me! */
115 /** Delay for write (Enable pulse width, 220ns) */
116 #define LCD_DELAY_WRITE \
125 /** Delay for read (Data ouput delay time, 120ns) */
126 #define LCD_DELAY_READ \
136 INLINE void lcd_hd44_hw_bus_init(void)
139 IRQ_SAVE_DISABLE(flags);
143 * to init a lcd device.
148 * Data bus is in output state most of the time:
149 * LCD r/w functions assume it is left in output state
157 #endif /* HW_LCD_HD44_H */