read_Miniate

unsigned char * read_Miniate()
{
  uchar *buffer = NULL;
  uchar buffer_fplength[16];
  uchar status;
  int lengthfp, totalrecorded;
  int count, i, numblocks, j=0;
  count=0;

  //reads length of Minutiae information
  status = MFRC522_Auth(AUTHENTICATION_TYPE, BLOCK_CFG, pkey, serNum);
  if (status == MI_OK)
    status = MFRC522_Read(BLOCK_CFG,buffer_fplength);

  lengthfp = buffer_fplength[0];
  lengthfp <<= 8;
  lengthfp += buffer_fplength[1];
  DPRINTF("READINGMINUTIAE: lengthfp: %d\n", lengthfp);
  numblocks = (ceil((float)(lengthfp)/16)); //catch how many blocks will be used
  DPRINTF("READINGMINUTIAE: numblocks: %d\n", numblocks);
  buffer = (char*) malloc(lengthfp);


  if(status == MI_OK){
    //numblocks = buffer_fplength[0];
    for (i=BLOCK_FPRINT; j<numblocks; i++)
    {
    if((i%4)<3)
    {
      status = MFRC522_Auth(AUTHENTICATION_TYPE, i, pkey, serNum);
      status = MFRC522_Read(i, (uchar*)(buffer+count));
      count += BLOCK_LENGTH;
      j++;
    }
    }
  }
  else
  {
    printf("Error reading fprint length\n");
  }

  DPRINTF("last block: %d\n", i);
  DPRINTF("last count: %d\n", count);
  fp = fopen("frameRD.xyt", "w");
  if(fp == NULL)
  {
    printf("Cannot create file\n");
    free(buffer);
    fclose(fp);
    return;
  }
  totalrecorded = fwrite(buffer, sizeof(char), lengthfp, fp);
  if(totalrecorded != lengthfp)
  {
      printf("Error writing minutiae file\n");
      free(buffer);
      fclose(fp);
      return;
  }
  printf("Minutiae read successfull\n");
  free(buffer);
  fclose(fp);
  //return buffer;
}