2 * Copyright © 2012 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; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 static volatile void *ao_wchan;
28 ao_arch_wait_interrupt();
33 asm("in %0,__SREG__" : "=&r" (sreg));
37 asm("out __SREG__,%0" : : "r" (sreg));
44 ao_delay(uint16_t ticks)
50 target = ao_tick_count + ticks;
53 } while ((int16_t) (target - ao_tick_count) > 0);
58 ao_wakeup(void *wchan)