#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "io.h"

#define PIN_DATA 1
#define PIN_CLK  2
#define PIN_ACK  0
#define PIN_IN   4
#define PIN_LED  3

#include "bus.h"
#include "timer.h"



void init_interrupt()
{
	MCUSR = 0;
	wdt_disable();
	DDRB &= ~(1<<PB4); /* Set PB0 as input */
	PORTB |= (1<<PB4); /* Activate PULL UP resistor */ 

	PCMSK |= (1 << PCINT4); /* Enable PCINT0 */
	GIMSK |= (1 << PCIE); /* Activate interrupt on enabled PCINT7-0 */
	sei ();
	
}
int main()
{
	unsigned long last=0;
	unsigned long current_data = 0;
	bus_t bus;
	init();
	init_write_pin(PIN_DATA,PIN_CLK,PIN_ACK);
	pinMode(PIN_IN, INPUT);
	pinMode(PIN_LED, OUTPUT);
	bus_init_send(&bus, PIN_DATA, PIN_CLK, PIN_ACK);

	pinMode(PIN_IN, INPUT);
	while(1)
	{
		while(digitalRead(PIN_IN)) delay(1);			
		while(!digitalRead(PIN_IN)) delay(1);			
		current_data=micros()-last;
		if(current_data<10000) continue;
		last=micros();
		bus_write_sync(&bus, &current_data, 4);
	}
}