#define F_CPU 7372800UL

#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include <stdlib.h>

#include "lcd.h"

void writeLCD(uint16_t adc) {
	lcd_clrscr();

	char adcStr[16];
	itoa(adc, adcStr, 10);
	lcd_puts(adcStr);
}

ISR(ADC_vect) {
	uint16_t temp = ((ADC * 5.0/1024) - 0.5) * 1000/10; //koliko svaka promjena iznosi u voltima oznacava 5.0/1024,
										//ovih -0.5 je offside, *1000 milivolti i podijelimo s 10 da dobijemo celzijuse

	writeLCD(temp);
}

int main(void) {
	DDRD = _BV(4);

	TCCR1A = _BV(COM1B1) | _BV(WGM10);
	TCCR1B = _BV(WGM12) | _BV(CS11);
	OCR1B = 64;

	lcd_init(LCD_DISP_ON);

	ADMUX = _BV(REFS0);
	ADCSRA = _BV(ADEN) | _BV(ADIE) | _BV(ADPS2) | _BV(ADPS1);

	sei();

	while (1) {
		ADCSRA |= _BV(ADSC);

		_delay_ms(1000);
	}
}