80 lines
2.0 KiB
C++
80 lines
2.0 KiB
C++
#ifdef HAS_RTC // we have hardware RTC
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#include "rtctime.h"
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// Local logging tag
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static const char TAG[] = __FILE__;
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RtcDS3231<TwoWire> Rtc(Wire); // RTC hardware i2c interface
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// initialize RTC
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uint8_t rtc_init(void) {
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Wire.begin(HAS_RTC);
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Rtc.Begin(MY_DISPLAY_SDA, MY_DISPLAY_SCL);
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// configure RTC chip
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Rtc.Enable32kHzPin(false);
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Rtc.SetSquareWavePin(DS3231SquareWavePin_ModeNone);
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if (!Rtc.GetIsRunning()) {
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ESP_LOGI(TAG, "RTC not running, starting now");
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Rtc.SetIsRunning(true);
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}
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#if (TIME_SYNC_COMPILEDATE)
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// initialize a blank RTC without battery backup with build time
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RtcDateTime tt = Rtc.GetDateTime();
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time_t t = tt.Epoch32Time(); // sec2000 -> epoch
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if (!Rtc.IsDateTimeValid() || !timeIsValid(t)) {
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ESP_LOGW(TAG, "RTC has no recent time, setting to compiletime");
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Rtc.SetDateTime(RtcDateTime(mkgmtime(compileTime()) -
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SECS_YR_2000)); // epoch -> sec2000
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}
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#endif
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ESP_LOGI(TAG, "RTC initialized");
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return 1; // success
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// failure
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// return 0
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} // rtc_init()
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uint8_t set_rtctime(time_t t) { // t is sec epoch time
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#ifdef RTC_INT // sync rtc 1Hz pulse on top of second
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Rtc.SetSquareWavePin(DS3231SquareWavePin_ModeNone); // off
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Rtc.SetSquareWavePin(DS3231SquareWavePin_ModeClock); // start
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#endif
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Rtc.SetDateTime(RtcDateTime(t - SECS_YR_2000)); // epoch -> sec2000
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ESP_LOGI(TAG, "RTC time synced");
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return 1; // success
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} // set_rtctime()
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time_t get_rtctime(uint16_t *msec) {
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time_t t = 0;
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*msec = 0;
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if (Rtc.IsDateTimeValid() && Rtc.GetIsRunning()) {
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RtcDateTime tt = Rtc.GetDateTime();
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t = tt.Epoch32Time(); // sec2000 -> epoch
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}
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// if we have a RTC pulse, we calculate msec
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#ifdef RTC_INT
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uint16_t ppsDiff = millis() - lastRTCpulse;
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if (ppsDiff < 1000)
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*msec = ppsDiff;
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else {
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ESP_LOGD(TAG, "no pulse from RTC");
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return 0;
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}
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#endif
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return t;
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} // get_rtctime()
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float get_rtctemp(void) {
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RtcTemperature temp = Rtc.GetTemperature();
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return temp.AsFloatDegC();
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} // get_rtctemp()
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#endif // HAS_RTC
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