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 Develer S.r.l. (http://www.develer.com/)
30 * Copyright 2001 Bernardo Innocenti <bernie@codewiz.org>
34 * \brief LCD low-level hardware macros
38 * \author Bernardo Innocenti <bernie@develer.com>
39 * \author Stefano Fedrigo <aleph@develer.com>
46 #include <appconfig.h>
48 #include <cfg/macros.h> /* BV() */
49 #include <cfg/debug.h>
53 #include <cpu/types.h>
55 #warning TODO: This is example implementation, you must implement it!
58 * \name LCD I/O pins/ports
61 #define LCD_RS /* Implement me! */
62 #define LCD_RW /* Implement me! */
63 #define LCD_E /* Implement me! */
64 #define LCD_DB0 /* Implement me! */
65 #define LCD_DB1 /* Implement me! */
66 #define LCD_DB2 /* Implement me! */
67 #define LCD_DB3 /* Implement me! */
68 #define LCD_DB4 /* Implement me! */
69 #define LCD_DB5 /* Implement me! */
70 #define LCD_DB6 /* Implement me! */
71 #define LCD_DB7 /* Implement me! */
75 * \name DB high nibble (DB[4-7])
80 #define LCD_MASK (LCD_DB7 | LCD_DB6 | LCD_DB5 | LCD_DB4)
83 #define LCD_MASK (uint8_t)0xff
89 * \name LCD bus control macros
92 #define LCD_CLR_RS /* Implement me! */
93 #define LCD_SET_RS /* Implement me! */
94 #define LCD_CLR_RD /* Implement me! */
95 #define LCD_SET_RD /* Implement me! */
96 #define LCD_CLR_E /* Implement me! */
97 #define LCD_SET_E /* Implement me! */
100 #define LCD_WRITE_H(x) /* Implement me! */
101 #define LCD_WRITE_L(x) /* Implement me! */
102 #define LCD_READ_H /* Implement me! */
103 #define LCD_READ_L /* Implement me! */
105 #define LCD_WRITE(x) /* Implement me! */
106 #define LCD_READ /* 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! */
116 /** Delay for write (Enable pulse width, 220ns) */
117 #define LCD_DELAY_WRITE \
126 /** Delay for read (Data ouput delay time, 120ns) */
127 #define LCD_DELAY_READ \
136 INLINE void lcd_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_H */