void setup() {
  // put your setup code here, to run once:
  volatile char *dirk,*dirf,x;
  volatile char *out,*ink;
  dirf=0x30; dirk=0x107;
  out=0x31;  ink=0x106;
  *dirf=0x01; *dirk=0x00;
  while(1){
    x= *ink;
    if((x & 0x01) == 0x01){
      *out=0x01;
    }
    else{
      *out=0x02;
    }
  }
}

void loop() {
  // put your main code here, to run repeatedly:

}