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/*
* Copyright © 2013 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.
*/
#ifndef _AO_DEBOUNCE_H_
#define _AO_DEBOUNCE_H_
struct ao_debounce {
struct ao_debounce *next;
/* time that pin value must be stable before accepting */
uint8_t hold;
/* last value reported to app; don't report it twice */
uint8_t value;
/* current value received from pins */
uint8_t current;
/* current count of intervals pin value has been stable */
uint8_t count;
/* This pin is running */
uint8_t running;
/* Get the current pin value */
uint8_t (*_get)(struct ao_debounce *debounce);
/* The stable value has changed */
void (*_set)(struct ao_debounce *debounce, uint8_t value);
};
static inline void
ao_debounce_config(struct ao_debounce *debounce,
uint8_t (*_get)(struct ao_debounce *debounce),
void (*_set)(struct ao_debounce *debounce, uint8_t value),
uint8_t hold)
{
debounce->next = 0;
debounce->hold = hold;
debounce->value = 0xff;
debounce->current = 0xff;
debounce->count = 0;
debounce->running = 0;
debounce->_get = _get;
debounce->_set = _set;
}
void
_ao_debounce_start(struct ao_debounce *debounce);
void
_ao_debounce_stop(struct ao_debounce *debounce);
void
ao_debounce_init(void);
void
ao_debounce_dump(void);
#endif /* _AO_DEBOUNCE_H_ */
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