/*
 * File:   max31329.h
 * Author: thebears
 *
 * Created on December 18, 2024, 1:24 PM
 */

#include "defines.h"
#include "i2c.h"
#include "rfm69.h"
#include "st25dv.h"
#include "uart.h"

#ifndef MAX31329_H
#define MAX31329_H

#ifdef __cplusplus
extern "C" {
#endif

#define I2C_ADDR 0x68

// MAX31329 register map (the subset this driver touches)
#define RTC_REG_STATUS 0x00 // Reading clears the alarm flags / releases INTB
#define RTC_REG_INT_EN 0x01
#define RTC_REG_CONFIG2 0x04
#define RTC_REG_SECONDS 0x06 // Start of the 7-byte BCD time block
#define RTC_REG_ALM2_MIN 0x13 // Start of the 3-byte alarm-2 block

#define RTC_INT_EN_A2IE 0b00000010 // Alarm-2 interrupt enable
#define RTC_ALM_MASK_BIT 0x80 // "Don't match this field" bit in each alarm register

#define DEC2BCD(n) ((n) + (6 * ((n) / 10)))
#define BCD2DEC(n) ((n) - (6 * ((n) >> 4)))

// time_struct.Year is years since 2000, which is exactly what the RTC's 2-digit
// year register holds -- no offset. (The old +/-30 round-tripped but stored the
// wrong year in the RTC and overflowed BCD above 2069.)
#define tmYearToY2k(Y) (Y)
#define y2kYearToTm(Y) (Y)

uint8_t rtc_enable_interrupts(void);
uint8_t rtc_set_per_minute_alarm(void);
uint8_t rtc_read_time_array(uint8_t* data);
time_struct rtc_read_time(void);
uint8_t rtc_write_time(time_struct tm);
uint8_t rtc_set_alarm_config(void);
uint8_t rtc_read_status_register(void);
uint8_t rtc_read_interrupt_register(void);
uint8_t rtc_read_register(uint8_t addr);
void uart_print_rtc_time(time_struct td);
RTC_RFM69_STATUS set_time_from_rfm69(identifier_results id_data);

#ifdef __cplusplus
}
#endif

#endif /* MAX31329_H */