mirror of https://github.com/arendst/Tasmota.git
133 lines
4.0 KiB
C++
133 lines
4.0 KiB
C++
/*
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xdrv_56_BM8563_RTC.ino - BM8563 RTC
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Copyright (C) 2021 Stephan Hadinger and Theo Arends
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef USE_I2C
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#ifdef USE_BM8563
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/*********************************************************************************************\
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* BM8563 - Real Time Clock
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*
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* I2C Address: 0x51 (Fixed in library as BM8563_ADRESS)
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\*********************************************************************************************/
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#define XDRV_56 56
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#define XI2C_59 59 // See I2CDEVICES.md
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#include "BM8563.h"
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struct {
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BM8563 Rtc;
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bool rtc_ready = false;
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bool ntp_time_ok = false;
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} bm8563_driver;
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uint32_t BM8563GetUtc(void) {
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RTC_TimeTypeDef RTCtime;
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// 1. read has errors ???
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bm8563_driver.Rtc.GetTime(&RTCtime);
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// core2_globs.Rtc.GetTime(&RTCtime);
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RTC_DateTypeDef RTCdate;
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bm8563_driver.Rtc.GetDate(&RTCdate);
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TIME_T tm;
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tm.second = RTCtime.Seconds;
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tm.minute = RTCtime.Minutes;
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tm.hour = RTCtime.Hours;
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tm.day_of_week = RTCdate.WeekDay;
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tm.day_of_month = RTCdate.Date;
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tm.month = RTCdate.Month;
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tm.year = RTCdate.Year - 1970;
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return MakeTime(tm);
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}
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void BM8563SetUtc(uint32_t epoch_time) {
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TIME_T tm;
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BreakTime(epoch_time, tm);
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RTC_TimeTypeDef RTCtime;
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RTCtime.Hours = tm.hour;
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RTCtime.Minutes = tm.minute;
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RTCtime.Seconds = tm.second;
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bm8563_driver.Rtc.SetTime(&RTCtime);
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RTC_DateTypeDef RTCdate;
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RTCdate.WeekDay = tm.day_of_week;
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RTCdate.Month = tm.month;
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RTCdate.Date = tm.day_of_month;
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RTCdate.Year = tm.year + 1970;
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bm8563_driver.Rtc.SetDate(&RTCdate);
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}
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/*********************************************************************************************/
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void BM8563Detect(void) {
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#ifdef ESP32
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if (!I2cSetDevice(BM8563_ADRESS, 0)) {
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if (!I2cSetDevice(BM8563_ADRESS, 1)) { return; } // check on bus 1
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bm8563_driver.Rtc.setBus(1); // switch to bus 1
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I2cSetActiveFound(BM8563_ADRESS, "BM8563", 1);
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} else {
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I2cSetActiveFound(BM8563_ADRESS, "BM8563", 0);
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}
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#else
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if (!I2cSetDevice(BM8563_ADRESS)) { return; }
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I2cSetActiveFound(BM8563_ADRESS, "BM8563");
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#endif
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bm8563_driver.Rtc.begin();
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bm8563_driver.rtc_ready = true;
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if (Rtc.utc_time < START_VALID_TIME) { // Not sync with NTP/GPS (time not valid), so read time
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uint32_t time = BM8563GetUtc(); // Read UTC TIME
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if (time > START_VALID_TIME) {
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Rtc.utc_time = time;
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RtcSync("BM8563");
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}
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}
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}
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void BM8563TimeSynced(void) {
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if ((Rtc.utc_time > START_VALID_TIME) && // Valid UTC time
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(abs((int32_t)(Rtc.utc_time - BM8563GetUtc())) > 2)) { // Time has drifted from RTC more than 2 seconds
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BM8563SetUtc(Rtc.utc_time); // Update time
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AddLog(LOG_LEVEL_DEBUG, PSTR("BM8: Re-synced (" D_UTC_TIME ") %s"), GetDateAndTime(DT_UTC).c_str());
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}
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}
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/*********************************************************************************************\
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* Interface
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\*********************************************************************************************/
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bool Xdrv56(uint8_t function) {
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if (!I2cEnabled(XI2C_59)) { return false; }
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bool result = false;
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if (FUNC_INIT == function) {
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BM8563Detect();
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}
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else if (bm8563_driver.rtc_ready) {
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switch (function) {
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case FUNC_TIME_SYNCED:
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BM8563TimeSynced();
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break;
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}
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}
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return result;
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}
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#endif // USE_BM8563
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#endif // USE_I2C
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