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/*
ac_input.c
Copyright Luki <humbell@ethz.ch>
Copyright 2011 Michel Pollet <buserror@gmail.com>
This file is part of simavr.
simavr 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, either version 3 of the License, or
(at your option) any later version.
simavr 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 simavr. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include "sim_avr.h"
#include "sim_time.h"
#include "ac_input.h"
#define USECS_PER_SECOND (1000 * 1000)
#define HZ (50)
static avr_cycle_count_t
switch_auto(
struct avr_t * avr,
avr_cycle_count_t when,
void * param)
{
ac_input_t * b = (ac_input_t *) param;
b->value = !b->value;
avr_raise_irq(b->irq + IRQ_AC_OUT, b->value);
return when + avr_usec_to_cycles(avr, USECS_PER_SECOND / HZ);
}
static const char * name = ">ac_input";
void ac_input_init(avr_t *avr, ac_input_t *b)
{
b->irq = avr_alloc_irq(&avr->irq_pool, 0, IRQ_AC_COUNT, &name);
b->avr = avr;
b->value = 0;
avr_cycle_timer_register_usec(avr, USECS_PER_SECOND / HZ, switch_auto, b);
printf("ac_input_init period %duS or %d cycles\n",
USECS_PER_SECOND / HZ,
(int)avr_usec_to_cycles(avr, USECS_PER_SECOND / HZ));
}
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