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debouncer.c
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debouncer.c
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#include "debouncer.h"
#include <stdbool.h>
#include "pico/stdlib.h"
#include "pico/util/queue.h"
#define DEBOUNCE_TIME_MS (20)
#define DEBOUNCE_COUNT (DEBOUNCE_TIME_MS * DEBOUNCE_TICK_HZ / 1000UL)
extern queue_t core0_evq;
void debouncer_init(debouncer_t *deb)
{
deb->count = 0;
gpio_init(deb->gpio_num);
gpio_set_dir(deb->gpio_num, GPIO_IN);
gpio_pull_up(deb->gpio_num);
}
int8_t debouncer_update(debouncer_t *deb)
{
int8_t ret = -1;
if (gpio_get(deb->gpio_num))
{
if (deb->count < DEBOUNCE_COUNT)
{
deb->count++;
if (deb->count == DEBOUNCE_COUNT)
{
if (deb->ev_release.tag != ev_none)
{
event_send(deb->ev_release);
}
ret = 0;
}
}
}
else
{
if (deb->count > 0)
{
deb->count--;
if (deb->count == 0)
{
if (deb->ev_press.tag != ev_none)
{
event_send(deb->ev_press);
}
ret = 1;
}
}
}
return ret;
}