void setup() {
  // put your setup code here, to run once:
  volatile char* dir ;
  dir = 0x30;
  *dir = 0xff;

}

void loop() {
  // put your main code here, to run repeatedly:
  volatile char *out ;
  volatile long i;
  out = 0x31;
  *out = 0x01;
  for(i=0;i<500000;i++);
  *out = 0x80;
  for(i=0;i<500000;i++);
  *out =0x03;
  for(i=0;i<500000;i++);
  *out = 0xc0;
  for(i=0;i<500000;i++);
  *out = 0x0f;
  for(i=0;i<500000;i++);
  *out = 0xf0;
  for(i=0;i<500000;i++);
  *out = 0xff;
  for(i=0;i<500000;i++);
  *out = 0x55;
  for(i=0;i<500000;i++);
  *out = 0xAA;
  for(i=0;i<500000;i++);
  *out = 0x9A;

}