void adc_init(void)				// Function to initialise the ADC feature
{
 ADCSRA=0X00;					// Clear previous ADC results and status flags
 ADMUX=0X60;					// 0x40 for 10 bits
 ADCSRA=0X87;					// We have set	the ADSC bit to start a conversion, and the
						// ADPS bits are set so that the prescaler is 128
 ACSRA=0X80;					// ADEN is set, to enable the ADC
}




unsigned char adc_start(unsigned char channel)		// Function to perform an ADC conversion, Takes 0-8 as input
							// to select which input to convert
{
 unsigned char i;
 ADCH=0x00;						// Clear the previous result
	
 i=channel&0x07;					// Decide which line to perform ADC conversion on
 ADMUX=i|0x60;						// Enter which line to perform in the ADC control register
 ADCSRA|=1<<ADSC;
   
 while(ADCSRA & (1<<ADSC));  				// wait for conv. to complete
 unsigned char temp=ADCH;				//unsigned int temp=ADC;   for 10 bits
 return temp;
}


/* ---------------- Sample ADC Call -----------------------*/

unsigned char result=adc_start(0);			// This performs ADC conversion on Pin A0 and stores the result
							// to variable "result"