parcer

void recognize_data(unsigned char data)
{
  if (rxCount > 0)
  {
    if (rxCount < 6)
    {
      if (rxCount == 5)
      {
        sz = data;
        put(data, &tbf);
        ++rxCount;
        return;
      }
      else
      {
        crc_head ^= data;
        put(data, &tbf);
        ++rxCount;
        return;
      }
    }
    else
    {
      if (rxCount == sz + 7 && rxCount != 0U)
      {
        crc_tail = data;
        rxCount = 0U;
        if (crc_head == crc_head_rec)
        {
          if (crc_tail == crc_tail_rec)
          {
            GPIOA->ODR |= (1U << 1);
          }
          else
          {
            return;
          }
        }
        else
          return;
      }
    }
  }
  else
  {
    if (data == 0x5F)
    {
      ++rxCount;
      put(data, &tbf);
      return;
    }
    else
    {
      return;
    }
  }
}