#include <avr/io.h>    
#define MISO 6

int main (void)
{
  DDRA = 0xFF ;			
  DDRB = (1<<MISO);		
  SPCR = (1<<SPE);		
  while(1){	
    SPDR = 'G' ;
    while(!(SPSR &(1<<SPIF)));
    PORTA = SPDR ;		
  }	
  return 0 ;
}