func: static int stellaris_enet_can_receive(void *opaque)
  
  {
  
      stellaris_enet_state *s = (stellaris_enet_state *)opaque;
  
  
  
      if ((s->rctl & SE_RCTL_RXEN) == 0)
  
          return 1;
  
  
  
      return (s->np < 31);
  
  }
  