diff options
Diffstat (limited to 'src/cc1111/ao_lcd_port.c')
| -rw-r--r-- | src/cc1111/ao_lcd_port.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/cc1111/ao_lcd_port.c b/src/cc1111/ao_lcd_port.c new file mode 100644 index 00000000..324cc3d3 --- /dev/null +++ b/src/cc1111/ao_lcd_port.c @@ -0,0 +1,41 @@ +/* + * Copyright © 2011 Keith Packard <keithp@keithp.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ + +#include "ao.h" + +void +ao_lcd_port_put_nibble(uint8_t rs, uint8_t nibble) +{ + P0 = (P0 & 0xf0) | (nibble & 0x0f); + P1_1 = rs; + P1_0 = 1; + ao_delay(1); + P1_0 = 0; + ao_delay(1); +} + +void +ao_lcd_port_init(void) +{ + /* LCD_E and LCD_RS are GPIO outputs */ + P1DIR |= 0x03; + P1SEL &= ~0x03; + + /* LCD D4-D7 are GPIO outputs */ + P0DIR |= 0x0f; + P0SEL &= ~0x0f; +} |