The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/i2c/ds1307reg.h

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    1 /*      $NetBSD: ds1307reg.h,v 1.1 2003/09/30 00:35:31 thorpej Exp $    */
    2 
    3 /*
    4  * Copyright (c) 2003 Wasabi Systems, Inc.
    5  * All rights reserved.
    6  *
    7  * Written by Steve C. Woodford for Wasabi Systems, Inc.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. All advertising materials mentioning features or use of this software
   18  *    must display the following acknowledgement:
   19  *      This product includes software developed for the NetBSD Project by
   20  *      Wasabi Systems, Inc.
   21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
   22  *    or promote products derived from this software without specific prior
   23  *    written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
   26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
   29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   35  * POSSIBILITY OF SUCH DAMAGE.
   36  */
   37 
   38 #ifndef _DEV_I2C_DS1307REG_H_
   39 #define _DEV_I2C_DS1307REG_H_
   40 
   41 /*
   42  * DS1307 64x8 Serial Real-Time Clock
   43  */
   44 
   45 #define DS1307_ADDR             0x68    /* Fixed I2C Slave Address */
   46 
   47 #define DS1307_SECONDS          0x00
   48 #define DS1307_MINUTES          0x01
   49 #define DS1307_HOURS            0x02
   50 #define DS1307_DAY              0x03
   51 #define DS1307_DATE             0x04
   52 #define DS1307_MONTH            0x05
   53 #define DS1307_YEAR             0x06
   54 #define DS1307_CONTROL          0x07
   55 #define DS1307_NVRAM_START      0x08
   56 #define DS1307_NVRAM_END        0x3f
   57 
   58 #define DS1307_NRTC_REGS        8
   59 #define DS1307_NVRAM_SIZE       ((DS1307_NVRAM_END - DS1307_NVRAM_START) + 1)
   60 
   61 /*
   62  * Bit definitions.
   63  */
   64 #define DS1307_SECONDS_CH       (1u << 7)       /* Clock Hold */
   65 #define DS1307_SECONDS_MASK     0x7f
   66 #define DS1307_MINUTES_MASK     0x7f
   67 #define DS1307_HOURS_24HRS      (1u << 6)       /* Set for 24 hour mode */
   68 #define DS1307_HOURS_12HRS_PM   (1u << 5)       /* If 12 hr mode, set = PM */
   69 #define DS1307_HOURS_12MASK     0x1f
   70 #define DS1307_HOURS_24MASK     0x3f
   71 #define DS1307_DAY_MASK         0x07
   72 #define DS1307_DATE_MASK        0x3f
   73 #define DS1307_MONTH_MASK       0x1f
   74 #define DS1307_CONTROL_OUT      (1u << 7)       /* OSC/OUT pin value */
   75 #define DS1307_CONTROL_SQWE     (1u << 4)       /* Enable square wave output */
   76 #define DS1307_CONTROL_1HZ      0
   77 #define DS1307_CONTROL_4096HZ   1
   78 #define DS1307_CONTROL_8192HZ   2
   79 #define DS1307_CONTROL_32768HZ  3
   80 
   81 #endif /* _DEV_I2C_DS1307REG_H_ */

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