1 /* $NetBSD: ds1307reg.h,v 1.2 2005/12/11 12:21:22 christos 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_ */ 82