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/*
button.c
This defines a sample for a very simple "peripheral"
that can talk to an AVR core.
It is in fact a bit more involved than strictly necessary,
but is made to demonstrante a few useful features that are
easy to use.
Copyright 2008, 2009 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 <stdlib.h>
#include <stdio.h>
#include "sim_avr.h"
#include "button.h"
static avr_cycle_count_t
button_auto_release(
avr_t * avr,
avr_cycle_count_t when,
void * param)
{
button_t * b = (button_t *)param;
avr_raise_irq(b->irq + IRQ_BUTTON_OUT, 1);
printf("button_auto_release\n");
return 0;
}
/*
* button press. set the "pin" to zerok and register a timer
* that will reset it in a few usecs
*/
void
button_press(
button_t * b,
uint32_t duration_usec)
{
avr_cycle_timer_cancel(b->avr, button_auto_release, b);
avr_raise_irq(b->irq + IRQ_BUTTON_OUT, 0);// press
// register the auto-release
avr_cycle_timer_register_usec(b->avr, duration_usec, button_auto_release, b);
}
void
button_init(
avr_t *avr,
button_t * b,
const char * name)
{
b->irq = avr_alloc_irq(&avr->irq_pool, 0, IRQ_BUTTON_COUNT, &name);
b->avr = avr;
}
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