testad1.c

ATMega16 ADC description

#include <avr/io.h>
#include <avr/interrupt.h> 
#include <math.h>

int main (void)
{
   double result;

   DDRB |= 0xFF; // Set LED1 as output
   DDRC |= 0xFF; // Set LED2 as output

   ADCSRA |= (1 << ADPS2) | (1 << ADPS1) | (1 << ADPS0); // Set ADC prescalar to 128 - 125KHz sample rate @ 16MHz

   ADMUX |= (0 << REFS1) | (0 << REFS0); // Set ADC reference to AREF
   

   // Set MUX to use ADC7

   ADMUX |=(1<<MUX2) | (1<<MUX1) | (1<<MUX0);

   
   SFIOR |= (1  << ADTS2) | (1 << ADTS1) | (1 << ADTS0); // Set ADC to Free-Running Mode

   
	for(;;)
   {
   ADCSRA |= (1 << ADEN);  // Enable ADC
   ADCSRA |= (1 << ADSC);  // Start A2D Conversions


   //result = ADC0*pow(2,0)+ADC1*pow(2,1)+ADC2*pow(2,2)+ADC3*pow(2,3)+ADC4*pow(2,4)+ADC5*pow(2,5)+ADC6*pow(2,6)+ADC7*pow(2,7);//+ADCL0*pow(2,0)+ADCL0*pow(2,0)+ 
  
   PORTB=ADCL;
   PORTC=ADCH; 
   
  // result= PORTB0*pow(2,0)+PORTB1*pow(2,1)+PORTB2*pow(2,2)+PORTB3*pow(2,3)+PORTB4*pow(2,4)+PORTB5*pow(2,5)+PORTB6*pow(2,6)+PORTB7*pow(2,7)+PORTC0*pow(2,0)+PORTB0*pow(2,0)+PORTB0*pow(2,0); 	
   
   }

}