Fork of the espurna firmware for `mhsw` switches
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/*
ds1307 support module
not tested but it almost similar to ds3231, so it maybe work
Copyright (C) 2018 by Pavel Chauzov <poulch at mail dot ru>
*/
#pragma once
#undef I2C_SUPPORT
#define I2C_SUPPORT 1 // Explicitly request I2C support.
#include <TimeLib.h>
#define DS1307ADDR 0x68
#define _bcdToDec(val) ((uint8_t) ((val / 16 * 10) + (val % 16)))
#define _decToBcd(val) ((uint8_t) ((val / 10 * 16) + (val % 10)))
time_t getTime_rtc() {
uint8_t data[7];
tmElements_t tm;
i2c_write_uint8(DS1307ADDR,0);
i2c_read_buffer(DS1307ADDR, data, 7);
tm.Second = _bcdToDec(data[0]);
tm.Minute = _bcdToDec(data[1]);
tm.Hour = _bcdToDec(data[2]);
tm.Wday = _bcdToDec(data[3]);
tm.Day = _bcdToDec(data[4]);
tm.Month = _bcdToDec(data[5]);
tm.Year = y2kYearToTm(_bcdToDec(data[6]));
return makeTime(tm);
}
uint8_t setTime_rtc(time_t nt) {
uint8_t data[8];
tmElements_t ct;
breakTime(nt, ct);
data[0] = 0;
data[1] = _decToBcd(ct.Second);
data[2] = _decToBcd(ct.Minute);
data[3] = _decToBcd(ct.Hour);
data[4] = _decToBcd(ct.Wday);
data[5] = _decToBcd(ct.Day);
data[6] = _decToBcd(ct.Month);
data[7] = _decToBcd(tmYearToY2k(ct.Year));
uint8_t s = i2c_write_buffer(DS1307ADDR, data, 8);
return s;
}