116 lines
2.6 KiB
C
116 lines
2.6 KiB
C
/*
|
|
* Driver for DS1307 RTC
|
|
*
|
|
* Part of esp-open-rtos
|
|
* Copyright (C) 2016 Ruslan V. Uss <unclerus@gmail.com>
|
|
* BSD Licensed as described in the file LICENSE
|
|
*/
|
|
#ifndef EXTRAS_DS1307_H_
|
|
#define EXTRAS_DS1307_H_
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <time.h>
|
|
#include <i2c/i2c.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define DS1307_ADDR 0x68
|
|
/**
|
|
* Squarewave frequency
|
|
*/
|
|
typedef enum _ds1307_squarewave_freq_t
|
|
{
|
|
DS1307_1HZ = 0, //!< 1 Hz
|
|
DS1307_4096HZ, //!< 4096 Hz
|
|
DS1307_8192HZ, //!< 8192 Hz
|
|
DS1307_32768HZ //!< 32768 Hz
|
|
} ds1307_squarewave_freq_t;
|
|
|
|
/**
|
|
* \brief Start/stop clock
|
|
* \param start Start clock if true
|
|
*/
|
|
void ds1307_start(i2c_dev_t* dev, bool start);
|
|
|
|
/**
|
|
* \brief Get current clock state
|
|
* \return true if clock running
|
|
*/
|
|
bool ds1307_is_running(i2c_dev_t* dev);
|
|
|
|
/**
|
|
* \brief Get current time
|
|
* \param time Pointer to the time struct to fill
|
|
*/
|
|
void ds1307_get_time(i2c_dev_t* dev, struct tm *time);
|
|
|
|
/**
|
|
* \brief Set time to RTC
|
|
* \param time Pointer to the time struct
|
|
*/
|
|
void ds1307_set_time(i2c_dev_t* dev, const struct tm *time);
|
|
|
|
/**
|
|
* \brief Enable or disable square-wave oscillator output
|
|
* \param enable Enable oscillator if true
|
|
*/
|
|
void ds1307_enable_squarewave(i2c_dev_t* dev, bool enable);
|
|
|
|
/**
|
|
* \brief Get square-wave oscillator output
|
|
* \return true if square-wave oscillator enabled
|
|
*/
|
|
bool ds1307_is_squarewave_enabled(i2c_dev_t* dev);
|
|
|
|
/**
|
|
* \brief Set square-wave oscillator frequency
|
|
* \param freq Frequency
|
|
*/
|
|
void ds1307_set_squarewave_freq(i2c_dev_t* dev, ds1307_squarewave_freq_t freq);
|
|
|
|
/**
|
|
* \brief Get current square-wave oscillator frequency
|
|
* \return Frequency
|
|
*/
|
|
ds1307_squarewave_freq_t ds1307_get_squarewave_freq(i2c_dev_t* dev);
|
|
|
|
/**
|
|
* \brief Get current output level of the SQW/OUT pin
|
|
* \return true if high
|
|
*/
|
|
bool ds1307_get_output(i2c_dev_t* dev);
|
|
|
|
/**
|
|
* \brief Set output level of the SQW/OUT pin
|
|
* Set output level if square-wave output is disabled
|
|
* \param value High level if true
|
|
*/
|
|
void ds1307_set_output(i2c_dev_t* dev, bool value);
|
|
|
|
/**
|
|
* \brief Read RAM contents into the buffer
|
|
* \param offset Start byte, 0..55
|
|
* \param buf Buffer
|
|
* \param len Bytes to read, 1..56
|
|
* \return Non-zero if error occured
|
|
*/
|
|
int ds1307_read_ram(i2c_dev_t* dev, uint8_t offset, uint8_t *buf, uint8_t len);
|
|
|
|
/**
|
|
* \brief Write buffer to RTC RAM
|
|
* \param offset Start byte, 0..55
|
|
* \param buf Buffer
|
|
* \param len Bytes to write, 1..56
|
|
* \return Non-zero if error occured
|
|
*/
|
|
int ds1307_write_ram(i2c_dev_t* dev, uint8_t offset, uint8_t *buf, uint8_t len);
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* EXTRAS_DS1307_H_ */
|