RTEMS  5.1
ds1307.h
1 /*
2  * This file contains the definitions for Dallas Semiconductor
3  * DS1307/DS1308 serial real-time clock/NVRAM.
4  *
5  * Copyright (C) 2000 OKTET Ltd., St.-Petersburg, Russia
6  * Author: Victor V. Vengerov <vvv@oktet.ru>
7  *
8  * The license and distribution terms for this file may be
9  * found in the file LICENSE in this distribution or at
10  *
11  * http://www.rtems.org/license/LICENSE.
12  */
13 
14 #ifndef __RTC_DS1307__
15 #define __RTC_DS1307__
16 
17 #define DS1307_I2C_ADDRESS (0xD0) /* I2C bus address assigned to DS1307 */
18 
19 #define DS1307_SECOND (0x00)
20 #define DS1307_SECOND_HALT (0x80) /* High bit is a Clock Halt bit */
21 #define DS1307_MINUTE (0x01)
22 #define DS1307_HOUR (0x02)
23 #define DS1307_HOUR_12 (0x40) /* 12-hour mode */
24 #define DS1307_HOUR_PM (0x20) /* PM in 12-hour mode */
25 #define DS1307_DAY_OF_WEEK (0x03)
26 #define DS1307_DAY (0x04)
27 #define DS1307_MONTH (0x05)
28 #define DS1307_YEAR (0x06)
29 #define DS1307_CONTROL (0x07)
30 #define DS1307_CONTROL_OUT (0x80) /* Output control */
31 #define DS1307_CONTROL_SQWE (0x10) /* Sqware Wave Enable */
32 #define DS1307_CONTROL_RS_1 (0x00) /* Rate select: 1 Hz */
33 #define DS1307_CONTROL_RS_4096 (0x01) /* Rate select: 4096 Hz */
34 #define DS1307_CONTROL_RS_8192 (0x02) /* Rate select: 8192 Hz */
35 #define DS1307_CONTROL_RS_32768 (0x03) /* Rate select; 32768 Hz */
36 
37 #define DS1307_NVRAM_START (0x08) /* Start location of non-volatile memory */
38 #define DS1307_NVRAM_END (0x3F) /* End location of non-volatile memory */
39 #define DS1307_NVRAM_SIZE (56) /* Size of non-volatile memory */
40 
41 #endif /* __RTC_DS1307__ */
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