Tasmota/tasmota/xdrv_56_BM8563_RTC.ino

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/*
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xdrv_56_BM8563_RTC.ino - BM8563 RTC
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Copyright (C) 2021 Stephan Hadinger and Theo Arends
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef USE_I2C
#ifdef USE_BM8563
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/*********************************************************************************************\
* BM8563 - Real Time Clock
*
* I2C Address: 0x51 (Fixed in library as BM8563_ADRESS)
\*********************************************************************************************/
#define XDRV_56 56
#define XI2C_59 59 // See I2CDEVICES.md
#include "BM8563.h"
struct {
BM8563 Rtc;
bool rtc_ready = false;
bool ntp_time_ok = false;
} bm8563_driver;
uint32_t BM8563GetUtc(void) {
RTC_TimeTypeDef RTCtime;
// 1. read has errors ???
bm8563_driver.Rtc.GetTime(&RTCtime);
// core2_globs.Rtc.GetTime(&RTCtime);
RTC_DateTypeDef RTCdate;
bm8563_driver.Rtc.GetDate(&RTCdate);
TIME_T tm;
tm.second = RTCtime.Seconds;
tm.minute = RTCtime.Minutes;
tm.hour = RTCtime.Hours;
tm.day_of_week = RTCdate.WeekDay;
tm.day_of_month = RTCdate.Date;
tm.month = RTCdate.Month;
tm.year = RTCdate.Year - 1970;
return MakeTime(tm);
}
void BM8563SetUtc(uint32_t epoch_time) {
TIME_T tm;
BreakTime(epoch_time, tm);
RTC_TimeTypeDef RTCtime;
RTCtime.Hours = tm.hour;
RTCtime.Minutes = tm.minute;
RTCtime.Seconds = tm.second;
bm8563_driver.Rtc.SetTime(&RTCtime);
RTC_DateTypeDef RTCdate;
RTCdate.WeekDay = tm.day_of_week;
RTCdate.Month = tm.month;
RTCdate.Date = tm.day_of_month;
RTCdate.Year = tm.year + 1970;
bm8563_driver.Rtc.SetDate(&RTCdate);
}
void InitTimeFromRTC(void) {
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if (Rtc.utc_time < START_VALID_TIME) {
// set rtc from chip
Rtc.utc_time = BM8563GetUtc();
TIME_T tmpTime;
TasmotaGlobal.ntp_force_sync = true; // Force to sync with ntp
BreakTime(Rtc.utc_time, tmpTime);
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Rtc.daylight_saving_time = RuleToTime(Settings->tflag[1], RtcTime.year);
Rtc.standard_time = RuleToTime(Settings->tflag[0], RtcTime.year);
AddLog(LOG_LEVEL_INFO, PSTR("I2C: Set time from BM8563 to RTC (" D_UTC_TIME ") %s, (" D_DST_TIME ") %s, (" D_STD_TIME ") %s"),
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GetDateAndTime(DT_UTC).c_str(), GetDateAndTime(DT_DST).c_str(), GetDateAndTime(DT_STD).c_str());
if (Rtc.local_time < START_VALID_TIME) { // 2016-01-01
TasmotaGlobal.rules_flag.time_init = 1;
} else {
TasmotaGlobal.rules_flag.time_set = 1;
}
}
}
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void BM8563Detect(void) {
#ifdef ESP32
if (!I2cSetDevice(BM8563_ADRESS, 0)) {
if (!I2cSetDevice(BM8563_ADRESS, 1)) { return; } // check on bus 1
bm8563_driver.Rtc.setBus(1); // switch to bus 1
I2cSetActiveFound(BM8563_ADRESS, "BM8563", 1);
} else {
I2cSetActiveFound(BM8563_ADRESS, "BM8563", 0);
}
#else
if (!I2cSetDevice(BM8563_ADRESS)) { return; }
I2cSetActiveFound(BM8563_ADRESS, "BM8563");
#endif
bm8563_driver.Rtc.begin();
bm8563_driver.rtc_ready = true;
InitTimeFromRTC();
}
void BM8563EverySecond(void) {
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if (!bm8563_driver.ntp_time_ok && (Rtc.utc_time > START_VALID_TIME) && abs((int32_t)Rtc.utc_time - (int32_t)BM8563GetUtc()) > 3) {
BM8563SetUtc(Rtc.utc_time);
AddLog(LOG_LEVEL_INFO, PSTR("I2C: Write time to BM8563 from NTP (" D_UTC_TIME ") %s, (" D_DST_TIME ") %s, (" D_STD_TIME ") %s"),
GetDateAndTime(DT_UTC).c_str(), GetDateAndTime(DT_DST).c_str(), GetDateAndTime(DT_STD).c_str());
bm8563_driver.ntp_time_ok = true;
}
}
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
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bool Xdrv56(uint8_t function) {
if (!I2cEnabled(XI2C_59)) { return false; }
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bool result = false;
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if (FUNC_INIT == function) {
BM8563Detect();
}
else if (bm8563_driver.rtc_ready) {
switch (function) {
case FUNC_EVERY_SECOND:
BM8563EverySecond();
break;
}
}
return result;
}
#endif // USE_BM8563
#endif // USE_I2C