diff options
Diffstat (limited to 'ao-bringup/ao_led_blink.c')
| -rw-r--r-- | ao-bringup/ao_led_blink.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/ao-bringup/ao_led_blink.c b/ao-bringup/ao_led_blink.c new file mode 100644 index 00000000..1e4c143d --- /dev/null +++ b/ao-bringup/ao_led_blink.c @@ -0,0 +1,50 @@ +/* + * Copyright © 2010 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_bringup.h" + +#define nop() _asm nop _endasm; + +void +delay (unsigned char n) +{ + unsigned char i = 0, j = 0; + + n <<= 1; + while (--n != 0) + while (--j != 0) + while (--i != 0) + nop(); +} + +main() +{ + ao_init(); + /* Set p1_0 and p1_1 to output */ + P1DIR = 0x03; + P1INP = 0x00; + for (;;) { + P1 = 1; + delay(5); + P1 = 2; + delay(5); + P1 = 3; + delay(5); + P1 = 0; + delay(5); + } +} |