text: /*
   *  serial.h
   *  vision
   *
   *  Created by 6. 270 on 1/17/10.
   *  Copyright 2010 Massachusetts Institute of Technology. All rights reserved.
   *
   */
  
  
  NSFileHandle *open_serial(NSString *path);
  void sync_serial(NSFileHandle *fh);
  void send_packet(NSFileHandle *fh, void *packet, uint8_t length);
  