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#include "project.h"
#define DEBOUNCE 20
static uint8_t r_state;
static uint32_t r_ticks;
static uint8_t r_current;
static uint8_t r_filtered;
static unsigned r_expiry;
#define RAIN_BANK GPIOA
#define RAIN_GPIO GPIO15
static int
raw_rain (void)
{
return !gpio_get (RAIN_BANK, RAIN_GPIO);
}
void rain_notify (void)
{
if (r_current)
vents_rain_notify();
}
void rain_ticker (void)
{
unsigned s;
static int ticker = 0;
s = raw_rain();
if (s == r_state) {
if (r_ticks < DEBOUNCE)
r_ticks++;
else if (r_ticks == DEBOUNCE) {
r_current = s;
r_ticks++;
printf ("D: rain state now %d\r\n", r_current);
}
} else {
r_ticks = 0;
r_state = s;
}
if (r_current) {
r_filtered = 1;
r_expiry = 1800;
}
rain_notify();
ticker++;
if (ticker < 1000) return;
ticker = 0;
if (r_expiry)
r_expiry--;
else
r_filtered = r_current;
}
void rain_slow_ticker (void)
{
printf ("R: %d %d\r\n", r_current, r_filtered);
}
int rain_filtered_state (void)
{
return r_filtered;
}
int rain_state (void)
{
return r_current;
}
char rain_state_char (void)
{
return r_current ? 'Y' : 'N';
}
void
rain_init (void)
{
gpio_set_mode (RAIN_BANK, GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN,
RAIN_GPIO);
gpio_set (RAIN_BANK, RAIN_GPIO);
}
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