void setup() {
  // put your setup code here, to run once:
  volatile char *dirf, *dirk;
  dirf = 0x30; dirk = 0x107;
  *dirf = 0xFF; *dirk = 0x00;
  volatile long i, j;
  volatile char *outf, *ink, x, y, count=0, num=0, sum=0, rem=0, num1=0, sum1=0, rem1=0;
  outf = 0x31; ink = 0x106;
  while(1)
  {
    x = *ink;
    if((x & 0x01)==0x01)
    {
      num = 1000;
      count++;
    }
    else if((x & 0x02)==0x02)
    {
      num = 2000;
      count++;
    }
    else if((x & 0x04)==0x04)
    {
      num = 3000;
      count++;
    }
    else if((x & 0x08)==0x08)
    {
      num = 4000;
      count++;
    }
    else if((x & 0x10)==0x10)
    {
      num = 5000;
      count++;
    }
    else if((x & 0x20)==0x20)
    {
      num = 6000;
      count++;
    }
    else if((x & 0x40)==0x40)
    {
      num = 7000;
      count++;
    }
    else if((x & 0x80)==0x80)
    {
      num = 8000;
      count++;
    }

    if(count==1)
    {
    if((x & 0x01)==0x01)
    {
      num = num+100;
      count++;
    }
    else if((x & 0x02)==0x02)
    {
      num = num+200;
      count++;
    }
    else if((x & 0x04)==0x04)
    {
      num = num+300;
      count++;
    }
    else if((x & 0x08)==0x08)
    {
      num = num+400;
      count++;
    }
    else if((x & 0x10)==0x10)
    {
      num = num+500;
      count++;
    }
    else if((x & 0x20)==0x20)
    {
      num = num+600;
      count++;
    }
    else if((x & 0x40)==0x40)
    {
      num = num+700;
      count++;
    }
    else if((x & 0x80)==0x80)
    {
      num = num+800;
      count++;
    }
    }

    if(count==2)
    {
    if((x & 0x01)==0x01)
    {
      num = num+10;
      count++;
    }
    else if((x & 0x02)==0x02)
    {
      num = num+20;
      count++;
    }
    else if((x & 0x04)==0x04)
    {
      num = num+30;
      count++;
    }
    else if((x & 0x08)==0x08)
    {
      num = num+40;
      count++;
    }
    else if((x & 0x10)==0x10)
    {
      num = num+50;
      count++;
    }
    else if((x & 0x20)==0x20)
    {
      num = num+60;
      count++;
    }
    else if((x & 0x40)==0x40)
    {
      num = num+70;
      count++;
    }
    else if((x & 0x80)==0x80)
    {
      num = num+80;
      count++;
    }
    }

    if(count==3)
    {
    if((x & 0x01)==0x01)
    {
      num = num+1;
      count++;
    }
    else if((x & 0x02)==0x02)
    {
      num = num+2;
      count++;
    }
    else if((x & 0x04)==0x04)
    {
      num = num+3;
      count++;
    }
    else if((x & 0x08)==0x08)
    {
      num = num+4;
      count++;
    }
    else if((x & 0x10)==0x10)
    {
      num = num+5;
      count++;
    }
    else if((x & 0x20)==0x20)
    {
      num = num+6;
      count++;
    }
    else if((x & 0x40)==0x40)
    {
      num = num+7;
      count++;
    }
    else if((x & 0x80)==0x80)
    {
      num = num+8;
      count++;
    }
    }

    //if(count==4)
    //{
    //  x=0x00;
    //}

    for(i=0; i<4; i++)
    {
      rem = num%10;
      num = num/10;
      sum = sum + rem;
    }
    if(sum>9)
    {
      for(j=0; j<2; j++)
      {
      rem1 = sum%10;
      sum = sum/10;
      sum1 = sum1+rem1;
      }
    }
    switch(sum1)
    {
      case 0:
      *outf = 0x3F;
      break;
      case 1:
      *outf = 0x06;
      break;
      case 2:
      *outf = 0x5B;
      break;
      case 3:
      *outf = 0x4F;
      break;
      case 4:
      *outf = 0x66;
      break;
      case 5:
      *outf = 0x6D;
      case 6:
      *outf = 0x7D;
      break;
      case 7:
      *outf = 0x07;
      break;
      case 8:
      *outf = 0x7F;
      break;
      case 9:
      *outf = 0x6F;
      break;
    }

  }
  
}

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