#define delay_ 5800

#define dir_f *((volatile char*)0x30)  // direction register address for port F
#define dir_k *((volatile char*)0x107)  // direction register address for port K

#define output_f *((volatile char*)0x31)  //output register address for port F
#define output_k *((volatile char*)0x108)  // output register address for port K

void wait()
{
  for(volatile long j = 0; j < delay_; j++);
}


int main()
{
  
  dir_f = 0xff;
  dir_k = 0xff;

  char A[] = {0x18, 0x24, 0x42, 0xff, 0x81, 0x81, 0x81, 0x81};

  
  while(1)
  {

    char row;
    char col;

    char k_bit = 0x01;

    for(row = 0; row < 8; row ++)
    {
      output_f = A[row];
      output_k = ~k_bit;
      wait();

      k_bit = (k_bit << 1);

    }
  }
}