#include <mega8.h>
#include <delay.h>
#define ADC_VREF_TYPE 0xE0 // Read the 8 most significant bits
                          // of the AD conversion result
unsigned char read_adc(unsigned char adc_input)
{
ADMUX=adc_input | (ADC_VREF_TYPE & 0xff);
// Delay needed for the stabilization of the ADC input voltage
delay_us(10);
            // Start the AD conversion
ADCSRA|=0x40;
// Wait for the AD conversion to complete
while ((ADCSRA & 0x10)==0);
ADCSRA|=0x10;
return ADCH;
}
void main(void)
{
unsigned int x,y,z;
PORTB=0x00;
DDRB=0xFF;
PORTC=0x00;
DDRC=0x00;
PORTD=0x00;
DDRD=0xFF;
TCCR0=0x00;
TCNT0=0x00;
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;f
MCUCR=0x00;
TIMSK=0x00;
UCSRB=0x00;
ACSR=0x80;
SFIOR=0x00;
ADMUX=ADC_VREF_TYPE & 0xff;
ADCSRA=0x83;
SPCR=0x00;
TWCR=0x00;
while (1)
      {
      // Place your code here
      x=read_adc(3);
      y=read_adc(4);
      z=read_adc(5);   
        PORTB=x;                                                
//---------------------------------------------------------------// X AXIS      
//---------------------------------------------------------------     if(x>0xab)
      {
      PORTD=0x0c;        
      }   
            else if(x<0x9b)
      {
      PORTD=0x03;
      }
//-------------------------------------------------------------- // Y AXIS
//------------------------------------------------------------------
    else if(y>0xab)
      {
      PORTD=0x08;        
      }   
            else if(y<0x9b)
      {
      PORTD=0x0e;
      }      
//--------------------------------------------------------------
//---------------------------------------------------------------

       else
      PORTD=0xff; 
      }
}







//Receiver main program

#include<reg51.h>
void main()
{
P2=0xff;
P1=0x00;
while(1)
{
if(P2==0x80)
{
P1=0xaa;
}
else if(P2==0xe0)
{
P1=0x55;
}
else if(P2==0x30)
{
P1=0xa5;
}
else if(P2==0xC0)
{
P1=0x5a;
}
else
P1=0x00;
}
}

[/restrict]