#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <avr/eeprom.h>
#define IRF_ALARM_BATTERY 890
#define IRF_ALARM_OUTPUT 890
#define WAIT(time) for(uint16_t i=0;i<2000;i++)_delay_loop_2(time);
int adc_data;
ISR(ADC_vect)
{
    // muutos globaaliksi //int adc_data;
    adc_data = ADCW;
    /*if(adc_data<=IRF_ALARM)
    {
        PORTC &= ~(1<<4);

    }*/
}

void ADC_init(void)
{
    ADMUX |= 1<<REFS0;  //(1<<REFS0) AVCC=5V with external capacitor at AREF pin

    ADMUX |= (1<<MUX1); // valitaan ADC2
    ADCSRA |= (1<<ADPS0) | (1<<ADPS1); // jakoluku 8
    // 1000000/8 = 125 kHz
    // oltava välillä 50 kHz ... 200 kHz
    ADCSRA |= (1<<ADIE)|(1<< ADEN); // adc ON ja keskeytys ON

}

int main (void)
{
    unsigned long ElapsedSeconds = 0;
	int irflippu;
	int counter;
	uint16_t ka;

    DDRB |=0xFF;

    DDRC |=(1<<4);
	PORTC |=(1<<4);

    DDRD &=~(1<<0);

    TCCR1B |= ((1 << CS10) | (1 << CS11)); // Set up timer1 at Fcpu/64
	TCCR0  |= ((1 << CS01) | (1 << CS00));    // Set up timer at Fcpu/64

    ADC_init();

    sei(); // globaali keskeytys sallittu

    while(1)
    {

        PORTB = (1 << 1);

        if (TCNT1 >= 15624)
        {
            TCNT1 = 0; // Reset timer value
            ElapsedSeconds++;

			if (ElapsedSeconds >= 30) // Check if a minute has elapsed
            {
				counter=0;
				ElapsedSeconds = 0; // Reset ElapsedSeconds variable
				/* KANAVAN VAIHTO */
				ADCSRA &=~(1<<ADEN);
				ADCSRA &=~(1<<ADATE);
				ADMUX|=0x00;
				ADMUX |= (1<<MUX1); // valitaan ADC2
				WAIT(1);

                PORTB = (1 << 0); // Start the test
               /*-----------------------------------------------------*/

				while(counter<=1000)
        		{
				if(TCNT0 >= 0xFF)
				{
				counter++;
				ADCSRA |= (1<< ADEN) | (1<<ADSC);

					if(ADCW<=IRF_ALARM_BATTERY)
    				{
					irflippu=1;
					WAIT(10);
					ADCSRA |= (1<< ADEN) | (1<<ADSC);
					}
						else if(irflippu==1&&ADCW<=IRF_ALARM_BATTERY)
						{
						PORTC &= ~(1<<4);
						}


				}

				}//end of while counter!=1000
				PORTB &=~(1<<0); //done


            }
        }
        /*tuotantotestaus*/
        if((PIND&0x01)==0x01)
        {
            ElapsedSeconds = 29;
        }
		/*---------------------------------------------------*/

		/* KANAVAN VAIHTO */
		ADCSRA &=~(1<<ADEN);
		ADCSRA &=~(1<<ADATE);
		ADMUX |= ((1<<MUX0)|(1<<MUX1)); // valitaan ADC3
        WAIT(1);
		/*----------------------------------------------------*/

        ADCSRA |= (1<< ADEN) | (1<<ADSC);
		if(ADCW<=IRF_ALARM_OUTPUT)
    	{
		irflippu=1;
		WAIT(10);
		ADCSRA |= (1<< ADEN) | (1<<ADSC);
		}
			else if(irflippu==1&&ADCW<=IRF_ALARM_OUTPUT)
			{
			PORTC &= ~(1<<4);
			}

    };
}