#include "lights.h"
+#define WAKEUP_LIMIT 5 // times 100 ms
static uint16_t button_start[N_BUTTONS];
static unsigned char prev_pin;
void init_buttons()
{
- DDRA &= ~(_BV(PA3) | _BV(PA4));
- PORTA |= _BV(PA3) | _BV(PA4);
+ DDRA &= ~(_BV(PA3) | _BV(PA4)); // set as input
+ PORTA |= _BV(PA3) | _BV(PA4); // enable internal pull-ups
+
+ GIMSK &= ~(_BV(PCIE0) | _BV(PCIE1)); // disable pin-change IRQs
+ PCMSK0 = 0; // disable pin-change IRQs on all pins of port A
+ PCMSK1 = 0; // disable pin-change IRQs on all pins of port B
button_start[0] = 0;
button_start[1] = 0;
user_params_state = 0;
}
+void susp_buttons()
+{
+ DDRA &= ~(_BV(PA3) | _BV(PA4)); // set as input
+ PORTA |= _BV(PA3) | _BV(PA4); // enable internal pull-ups
+
+ GIMSK &= ~_BV(PCIE1); // disable pin-change IRQ on port B
+ GIMSK |= _BV(PCIE0);
+
+ PCMSK0 = _BV(PCINT3) | _BV(PCINT4);
+ // disable pin-change IRQs on all pins except PA3,PA4
+ PCMSK1 = 0; // disable pin-change IRQs on all pins of port B
+}
+
static void handle_button(unsigned char button, unsigned char cur,
unsigned char prev)
{
}
}
+unsigned char buttons_wait_for_release()
+{
+ uint16_t wake_count = 0;
+ unsigned char pin;
+
+ do {
+ if (wake_count++ > WAKEUP_LIMIT)
+ gpio_set(0, 1); // inform the user
+
+ _delay_ms(100);
+
+ pin = PINA & (_BV(PA3) | _BV(PA4));
+ } while (!(pin & _BV(PA3)) || !(pin & _BV(PA4)));
+
+ gpio_set(0, 0);
+
+ return wake_count > WAKEUP_LIMIT;
+
+}
+
+ISR(PCINT_vect)
+{
+ // empty - let it wake us from sleep, but do nothing else
+}
+