17413ab064
Add support for DS3231 extremely accurate I2C real-time clock (RTC). Signed-off-by: Bhuvanchandra <bhuvanchandra.dv@gmail.com>
83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
#ifndef __DS3231_H__
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#define __DS3231_H__
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#include <stdint.h>
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#include <stdbool.h>
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#include <time.h>
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#define DS3231_ADDR 0x68
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#define DS3231_STAT_OSCILLATOR 0x80
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#define DS3231_STAT_32KHZ 0x08
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#define DS3231_STAT_BUSY 0x04
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#define DS3231_STAT_ALARM_2 0x02
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#define DS3231_STAT_ALARM_1 0x01
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#define DS3231_CTRL_OSCILLATOR 0x80
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#define DS3231_CTRL_SQUAREWAVE_BB 0x40
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#define DS3231_CTRL_TEMPCONV 0x20
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#define DS3231_CTRL_SQWAVE_4096HZ 0x10
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#define DS3231_CTRL_SQWAVE_1024HZ 0x08
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#define DS3231_CTRL_SQWAVE_8192HZ 0x18
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#define DS3231_CTRL_SQWAVE_1HZ 0x00
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#define DS3231_CTRL_ALARM_INTS 0x04
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#define DS3231_CTRL_ALARM2_INT 0x02
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#define DS3231_CTRL_ALARM1_INT 0x01
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#define DS3231_ALARM_NONE 0
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#define DS3231_ALARM_1 1
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#define DS3231_ALARM_2 2
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#define DS3231_ALARM_BOTH 3
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#define DS3231_ALARM1_EVERY_SECOND 0
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#define DS3231_ALARM1_MATCH_SEC 1
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#define DS3231_ALARM1_MATCH_SECMIN 2
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#define DS3231_ALARM1_MATCH_SECMINHOUR 3
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#define DS3231_ALARM1_MATCH_SECMINHOURDAY 4
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#define DS3231_ALARM1_MATCH_SECMINHOURDATE 5
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#define DS3231_ALARM2_EVERY_MIN 0
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#define DS3231_ALARM2_MATCH_MIN 1
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#define DS3231_ALARM2_MATCH_MINHOUR 2
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#define DS3231_ALARM2_MATCH_MINHOURDAY 3
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#define DS3231_ALARM2_MATCH_MINHOURDATE 4
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#define DS3231_ALARM_WDAY 0x40
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#define DS3231_ALARM_NOTSET 0x80
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#define DS3231_ADDR_TIME 0x00
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#define DS3231_ADDR_ALARM1 0x07
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#define DS3231_ADDR_ALARM2 0x0b
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#define DS3231_ADDR_CONTROL 0x0e
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#define DS3231_ADDR_STATUS 0x0f
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#define DS3231_ADDR_AGING 0x10
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#define DS3231_ADDR_TEMP 0x11
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#define DS3231_SET 0
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#define DS3231_CLEAR 1
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#define DS3231_REPLACE 2
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#define DS3231_12HOUR_FLAG 0x40
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#define DS3231_12HOUR_MASK 0x1f
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#define DS3231_PM_FLAG 0x20
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#define DS3231_MONTH_MASK 0x1f
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bool ds3231_setTime(struct tm *time);
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bool ds3231_setAlarm(uint8_t alarms, struct tm *time1, uint8_t option1, struct tm *time2, uint8_t option2);
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bool ds3231_getOscillatorStopFlag(bool *flag);
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bool ds3231_clearOscillatorStopFlag();
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bool ds3231_getAlarmFlags(uint8_t *alarms);
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bool ds3231_clearAlarmFlags(uint8_t alarm);
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bool ds3231_enableAlarmInts(uint8_t alarms);
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bool ds3231_disableAlarmInts(uint8_t alarms);
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bool ds3231_enable32khz();
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bool ds3231_disable32khz();
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bool ds3231_enableSquarewave();
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bool ds3231_disableSquarewave();
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bool ds3231_setSquarewaveFreq(uint8_t freq);
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bool ds3231_getTempInteger(int8_t *temp);
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bool ds3231_getTempFloat(float *temp);
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bool ds3231_getTime(struct tm *time);
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void ds3231_Init(uint8_t scl, uint8_t sda);
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#endif
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