ground_sensor/main.cpp

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/*

 QRD1114 Ground Sensord Example
 
 Copyright 2010 Tymon Tobolski
 Politechnika Wroclawska
 
*/

#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
// #include "../../lib/lcd/lcd.h"


// LCD lcd;
volatile int adc_value = 0;

SIGNAL (SIG_ADC){
        adc_value = (ADCL | (ADCH << 8));
        ADCSRA |= _BV(ADSC);
}

int main(void){
        // ADC init
        ADCSRA = _BV(ADEN) | _BV(ADIE) | _BV(ADSC) | _BV(ADPS0) | _BV(ADPS1) | _BV(ADPS2); //INIT ADC
        ADMUX = _BV(REFS0);
        
        sei();
        
        DDRD = 0xFF;
        
        //lcd << "adc: ";
        
    for(;;){
                PORTD = ~(1 << ((adc_value+1)/128)-1);
                
                //lcd.gotoxy(5, 0);
                //lcd << adc_value;
                //lcd << "     ";
                _delay_ms(50);
        }
    return 0;
}