firmware/export/ds2411.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2007 by Michael Sevakis
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #ifndef _DS2411_H_
  23 #define _DS2411_H_
  24
  25 #include <stdbool.h>
  26
  27 /*
  28  * Byte 0:    8-bit family code (always 01h)
  29  * Bytes 1-6: 48-bit serial number
  30  * Byte 7:    8-bit CRC code
  31  */
  32 struct ds2411_id
  33 {
  34     unsigned char family_code;
  35     unsigned char uid[6];
  36     unsigned char crc;
  37 } __attribute__((packed));
  38
  39 extern int ds2411_read_id(struct ds2411_id *id);
  40
  41 /* return values */
  42 enum ds2411_id_return_codes
  43 {
  44     DS2411_NO_PRESENCE = -3,
  45     DS2411_INVALID_FAMILY_CODE,
  46     DS2411_INVALID_CRC,
  47     DS2411_OK = 0,
  48 };
  49
  50 #endif /* _DS2411_H_ */