#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include <stdlib.h>
#include <stdio.h>
#include "lcd.h"
//globalna premenna adc
volatile unsigned int adc;
// prerušenie na akciu skončenia AD prevodu
ISR(ADC_vect){
adc=ADC; // zapis vysledok prevodu
}
int main(){
char text[32];
long u;
ADMUX |= (1 << REFS0); //referencia 5V
// zapnutie AD prevodnika, Free runing,
// preddelicka 128 pri frek. hodin 8MHz
ADCSRA |= (1 << ADEN) | (1 << ADSC) | (1 << ADFR)
| (1 << ADIE) | (1 <<ADPS2) | (1 <<ADPS1) | (1 <<ADPS0);
sei(); //povol globalne prerusenia
lcd_init(LCD_DISP_ON);
while(1){
// vypocet napatia v mV
u = ((long)adc*5000/1024);
sprintf(text,"ADC:%d \nU:%ldmV",adc,u);
lcd_clrscr();
lcd_gotoxy(0,0);
lcd_puts(text);
_delay_ms(500);
}
}