#include <avr/io.h>    
  #define mosi 5
  #define sck 7
  int main (void)
  {
    ddrb = (1<<mosi)|(1<<sck);    
    ddra = 0xff ;        
    spcr = (1<<spe)|(1<<mstr)|(1<<spr0);
    while(1){        
      spdr = 'g';        
      while(!(spsr & (1<<spif)));    
      porta = spdr ;        
    }                
    return 0 ;
  }