#define FIRST_ADC_INPUT 0
#define LAST_ADC_INPUT 3
unsigned char adc_data[LAST_ADC_INPUT-FIRST_ADC_INPUT+1];
#define ADC_VREF_TYPE ((1<<REFS0) | (1<<ADLAR))
 
interrupt [ADC_INT] void adc_isr(void)
{
static unsigned char input_index=0;
adc_data[input_index]=ADCH;
if (++input_index > (LAST_ADC_INPUT-FIRST_ADC_INPUT))
   input_index=0;
ADMUX=(FIRST_ADC_INPUT | ADC_VREF_TYPE)+input_index;
delay_us(10);
ADCSRA|=(1<<ADSC);
}
 
void main(void)
{
 
DIDR0|=(1<<ADC0D) | (1<<ADC2D) | (0<<ADC3D) | (0<<ADC1D);
ADMUX=FIRST_ADC_INPUT | ADC_VREF_TYPE;
ADCSRA=(1<<ADEN) | (1<<ADSC) | (1<<ADATE) | (0<<ADIF) | (1<<ADIE) | (0<<ADPS2) | (1<<ADPS1) | (1<<ADPS0);
ADCSRB=(0<<ADTS2) | (0<<ADTS1) | (0<<ADTS0);
#asm("sei")
 
}