2020-07-22 21:44:17 +02:00
|
|
|
// Copyright 2020 Lukas Haubaum
|
|
|
|
|
//
|
|
|
|
|
// Licensed under the GNU Affero General Public License, Version 3;
|
|
|
|
|
// you may not use this file except in compliance with the License.
|
|
|
|
|
// You may obtain a copy of the License at
|
|
|
|
|
|
|
|
|
|
// https://www.gnu.org/licenses/agpl-3.0.html
|
|
|
|
|
//
|
|
|
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
|
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
|
|
// See the License for the specific language governing permissions and
|
|
|
|
|
// limitations under the License.
|
2020-07-27 16:54:51 +02:00
|
|
|
/**
|
|
|
|
|
* @file
|
|
|
|
|
*
|
|
|
|
|
* @brief I2C driver for DS3231 Real Time Clock
|
|
|
|
|
*
|
|
|
|
|
*/
|
2020-07-22 21:44:17 +02:00
|
|
|
#ifndef _ds3231_H_
|
|
|
|
|
#define _ds3231_H_
|
|
|
|
|
|
|
|
|
|
#include <time.h>
|
|
|
|
|
|
|
|
|
|
// I2C address
|
|
|
|
|
#define DS3231_ADDRESS 0x68
|
|
|
|
|
|
|
|
|
|
// I2C registers
|
|
|
|
|
#define DS3231_TIME 0x00
|
|
|
|
|
#define DS3231_SECONDS 0x00
|
|
|
|
|
#define DS3231_MINUTES 0x01
|
|
|
|
|
#define DS3231_HOURS 0x02
|
|
|
|
|
#define DS3231_DAY 0x03
|
|
|
|
|
#define DS3231_DATE 0x04
|
|
|
|
|
#define DS3231_MONTH 0x05
|
|
|
|
|
#define DS3231_YEAR 0x06
|
|
|
|
|
#define DS3231_ALARM1_SECONDS 0x07
|
|
|
|
|
#define DS3231_ALARM1_MINUTES 0x08
|
|
|
|
|
#define DS3231_ALARM1_HOURS 0x09
|
|
|
|
|
#define DS3231_ALARM1_DATE 0x0A
|
|
|
|
|
#define DS3231_ALARM2_MINUTES 0x0B
|
|
|
|
|
#define DS3231_ALARM2_HOURS 0x0C
|
|
|
|
|
#define DS3231_ALARM2_DATE 0x0D
|
|
|
|
|
#define DS3231_CONTROL 0x0E
|
|
|
|
|
#define DS3231_STATUS 0x0F
|
|
|
|
|
#define DS3231_AGING_OFFSET 0x10
|
|
|
|
|
#define DS3231_MSB_TEMP 0x11
|
|
|
|
|
#define DS3231_LSB_TEMP 0x12
|
|
|
|
|
|
|
|
|
|
// control registers
|
|
|
|
|
#define DS3231_CONTROL_A1IE 0x01
|
|
|
|
|
#define DS3231_CONTROL_A2IE 0x02
|
|
|
|
|
#define DS3231_CONTROL_INTCN 0x04
|
|
|
|
|
#define DS3231_CONTROL_RS1 0x08
|
|
|
|
|
#define DS3231_CONTROL_RS2 0x10
|
|
|
|
|
#define DS3231_CONTROL_CONV 0x20
|
|
|
|
|
#define DS3231_CONTROL_BBSQW 0x40
|
|
|
|
|
#define DS3231_CONTROL_EOSC 0x80
|
|
|
|
|
|
|
|
|
|
// status registers
|
|
|
|
|
#define DS3231_STATUSL_A1F 0x01
|
|
|
|
|
#define DS3231_STATUSL_A2F 0x02
|
|
|
|
|
#define DS3231_STATUSL_BSY 0x04
|
|
|
|
|
#define DS3231_STATUSL_EN32KHZ 0x08
|
|
|
|
|
#define DS3231_STATUSL_OSF 0x80
|
|
|
|
|
|
|
|
|
|
// flags
|
|
|
|
|
#define DS3231_CENTURY_FLAG 0x80
|
|
|
|
|
#define DS3231_12_HOUR_FLAG 0x40
|
|
|
|
|
#define DS3231_PM_HOUR_FLAG 0x20
|
|
|
|
|
#define DS3231_12_HOUR_MASK 0x1F
|
|
|
|
|
#define DS3231_MONTH_MASK 0x1F
|
|
|
|
|
|
|
|
|
|
#endif
|
