Register definitions for DS1307 RTC. More...

Detailed Description

Register definitions for DS1307 RTC.

Author: Martine Lenders m.len.nosp@m.ders.nosp@m.@fu-b.nosp@m.erli.nosp@m.n.de

Registers
#define	DS1307_REG_SEC (0x00)
	seconds

#define	DS1307_REG_MIN (0x01)
	minutes

#define	DS1307_REG_HOUR (0x02)
	hours

#define	DS1307_REG_DOW (0x03)
	day of week (1-7, 1 == sunday)

#define	DS1307_REG_DOM (0x04)
	day of month

#define	DS1307_REG_MON (0x05)
	month

#define	DS1307_REG_YEAR (0x06)
	year

#define	DS1307_REG_SQW_CTL (0x07)
	SQW control.

#define	DS1307_REG_RAM_FIRST (0x08)
	NVRAM start.

#define	DS1307_REG_RAM_LAST (0x3F)
	NVRAM end.

Register bits
#define	DS1307_REG_SEC_CH (0x80)
	clock halt bit

#define	DS1307_REG_SEC_MASK (0x7f)
	seconds mask

#define	DS1307_REG_MIN_MASK (0x7f)
	minutes mask

#define	DS1307_REG_HOUR_12H (0x40)
	12-hour (0) / 24-hour (1) mode

#define	DS1307_REG_HOUR_PM (0x20)
	AM (0) / PM (1) in 12-hour mode.

#define	DS1307_REG_HOUR_12H_MASK (0x2f)
	hour (12-hour mode)

#define	DS1307_REG_HOUR_24H_MASK (0x3f)
	hour (24-hour mode)

#define	DS1307_REG_DOW_MASK (0x07)
	day of week mask

#define	DS1307_REG_DOM_MASK (0x3f)
	day of month mask

#define	DS1307_REG_MON_MASK (0x1f)
	month mask

Custom offsets (to DS1307 registers to struct tm)
#define	DS1307_DOW_OFFSET (1)
	offset in days from sunday

#define	DS1307_MON_OFFSET (1)
	offset in month from January

#define	DS1307_YEAR_OFFSET (-100)
	offset in years from 1900

Macro Definition Documentation

◆ DS1307_DOW_OFFSET

#define DS1307_DOW_OFFSET (1)

offset in days from sunday

Definition at line 62 of file ds1307_internal.h.

◆ DS1307_MON_OFFSET

#define DS1307_MON_OFFSET (1)

offset in month from January

Definition at line 63 of file ds1307_internal.h.

◆ DS1307_REG_DOM

#define DS1307_REG_DOM (0x04)

day of month

Definition at line 34 of file ds1307_internal.h.

◆ DS1307_REG_DOM_MASK

#define DS1307_REG_DOM_MASK (0x3f)

day of month mask

Definition at line 54 of file ds1307_internal.h.

◆ DS1307_REG_DOW

#define DS1307_REG_DOW (0x03)

day of week (1-7, 1 == sunday)

Definition at line 33 of file ds1307_internal.h.

◆ DS1307_REG_DOW_MASK

#define DS1307_REG_DOW_MASK (0x07)

day of week mask

Definition at line 53 of file ds1307_internal.h.

◆ DS1307_REG_HOUR

#define DS1307_REG_HOUR (0x02)

hours

Definition at line 32 of file ds1307_internal.h.

◆ DS1307_REG_HOUR_12H

#define DS1307_REG_HOUR_12H (0x40)

12-hour (0) / 24-hour (1) mode

Definition at line 49 of file ds1307_internal.h.

◆ DS1307_REG_HOUR_12H_MASK

#define DS1307_REG_HOUR_12H_MASK (0x2f)

hour (12-hour mode)

Definition at line 51 of file ds1307_internal.h.

◆ DS1307_REG_HOUR_24H_MASK

#define DS1307_REG_HOUR_24H_MASK (0x3f)

hour (24-hour mode)

Definition at line 52 of file ds1307_internal.h.

◆ DS1307_REG_HOUR_PM

#define DS1307_REG_HOUR_PM (0x20)

AM (0) / PM (1) in 12-hour mode.

Definition at line 50 of file ds1307_internal.h.

◆ DS1307_REG_MIN

#define DS1307_REG_MIN (0x01)

minutes

Definition at line 31 of file ds1307_internal.h.

◆ DS1307_REG_MIN_MASK

#define DS1307_REG_MIN_MASK (0x7f)

minutes mask

Definition at line 48 of file ds1307_internal.h.

◆ DS1307_REG_MON

#define DS1307_REG_MON (0x05)

month

Definition at line 35 of file ds1307_internal.h.

◆ DS1307_REG_MON_MASK

#define DS1307_REG_MON_MASK (0x1f)

month mask

Definition at line 55 of file ds1307_internal.h.

◆ DS1307_REG_RAM_FIRST

#define DS1307_REG_RAM_FIRST (0x08)

NVRAM start.

Definition at line 38 of file ds1307_internal.h.

◆ DS1307_REG_RAM_LAST

#define DS1307_REG_RAM_LAST (0x3F)

NVRAM end.

Definition at line 39 of file ds1307_internal.h.

◆ DS1307_REG_SEC

#define DS1307_REG_SEC (0x00)

seconds

Definition at line 30 of file ds1307_internal.h.

◆ DS1307_REG_SEC_CH

#define DS1307_REG_SEC_CH (0x80)

clock halt bit

Definition at line 46 of file ds1307_internal.h.

◆ DS1307_REG_SEC_MASK

#define DS1307_REG_SEC_MASK (0x7f)

seconds mask

Definition at line 47 of file ds1307_internal.h.

◆ DS1307_REG_SQW_CTL

#define DS1307_REG_SQW_CTL (0x07)

SQW control.

Definition at line 37 of file ds1307_internal.h.

◆ DS1307_REG_YEAR

#define DS1307_REG_YEAR (0x06)

year

Definition at line 36 of file ds1307_internal.h.

◆ DS1307_YEAR_OFFSET

#define DS1307_YEAR_OFFSET (-100)

offset in years from 1900

Definition at line 64 of file ds1307_internal.h.