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buttons.c
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buttons.c
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#include "globals.h"
#include "buttons.h"
#include "clock.h"
static void _update(button_t *button);
uint32_t last_button_press_ticks = 0;
button_t buttons[BUTTON_COUNT];
bool_t longPress, multiPress;
void buttons_age() {
int i;
uint8_t pressCount = 0;
for(i=0; i<BUTTON_COUNT; i++) {
buttons[i].old = buttons[i].current;
if (buttons[i].current) {
pressCount++;
}
}
multiPress = (pressCount > 1);
if (pressCount > 0) {
last_button_press_ticks = clock_ticks;
}
}
void buttons_update() {
int i;
uint8_t pressCount = 0;
longPress = false;
for(i=0; i<BUTTON_COUNT; i++) {
_update(&buttons[i]);
if (buttons[i].current == DOWN) {
pressCount++;
uint32_t duration = clock_ticks - buttons[i].update_time;
if (duration > TICKS_PER_SECOND / 2)
longPress = true;
}
}
multiPress = (pressCount > 1) || multiPress;
}
bool_t pressed(button_t *button) {
return (button->old == UP) && (button->current == DOWN);
}
static void _update(button_t *button) {
button_state_t state = !(*button->port & _BV(button->pin));
if (state != button->current) {
if (button->update_time + 1 < clock_ticks) {
button->old = button->current;
button->current = state;
button->update_time = clock_ticks;
if (state == DOWN)
button->down_time = clock_ticks;
}
}
}