/*
 * main.c
 *
 *  Created on: 28 lut 2015
 *      Author: miszczo
 *
 *; ============================================
 *;   H A R D W A R E   I N F O R M A T I O N
 *; ============================================
 *;
 *;
 *;               ____________
 *;              /  ATtiny13  |
 *;         |             |
 *;    RESET o--|RES       VCC|--o +5V VCC
 *;             |             |
 *;     ADC  o--|PB3       PB2|--o SCK
 *;             |             |
 *;     LED  o--|PB4       PB1|--o MISO
 *;             |             |
 *;      0 V o--|GND       PB0|--o MOSI
 *;             |_____________|
 *;
 */

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

#define LED_OFF PORTB |=(1<<PB4)
#define LED_ON PORTB &= ~(1<<PB4)

uint8_t get_random(void);


int main()
{
    DDRB = (1<<PB4);
    while(1){
        if(get_random()) LED_ON;
        else LED_OFF;
        _delay_ms(400);

    }
}

// funckaj zwaraca losowa wartosc 1 lub 0
uint8_t get_random(void){
    ADMUX = (1<<MUX0)|(1<<MUX1); // pomiar na PB3
    //ustawienia adc, adc enable , preskaler 128 , start conversion,
    ADCSRA = (1<<ADEN) | (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0) | (1<<ADSC);
    while(ADCSRA&(1<<ADSC));//wait for end conversion
    return (ADCL&0x01);
}