2 * Copyright © 2011 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 ao_lcd_port_delay(void)
25 for (i = 0; i < 100; i++)
30 ao_lcd_port_put_nibble(uint8_t rs, uint8_t nibble)
32 P0 = (P0 & 0xf0) | (nibble & 0x0f);
41 ao_lcd_port_init(void)
43 /* LCD_E and LCD_RS are GPIO outputs */
47 /* LCD D4-D7 are GPIO outputs */