51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2007 by Michael Sevakis
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _DS2411_H_
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#define _DS2411_H_
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#include <stdbool.h>
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/*
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* Byte 0: 8-bit family code (always 01h)
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* Bytes 1-6: 48-bit serial number
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* Byte 7: 8-bit CRC code
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*/
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struct ds2411_id
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{
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unsigned char family_code;
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unsigned char uid[6];
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unsigned char crc;
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} __attribute__((packed));
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extern int ds2411_read_id(struct ds2411_id *id);
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/* return values */
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enum ds2411_id_return_codes
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{
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DS2411_NO_PRESENCE = -3,
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DS2411_INVALID_FAMILY_CODE,
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DS2411_INVALID_CRC,
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DS2411_OK = 0,
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};
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#endif /* _DS2411_H_ */
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