71 lines
2 KiB
C
71 lines
2 KiB
C
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#pragma once
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#include <Arduino.h>
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#include <Wire.h>
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namespace tbeam {
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struct DateTime {
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uint16_t year = 0;
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uint8_t month = 0;
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uint8_t day = 0;
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uint8_t hour = 0;
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uint8_t minute = 0;
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uint8_t second = 0;
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uint8_t weekday = 0;
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};
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struct ClockConfig {
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uint8_t rtcAddress = 0x51;
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int sda = -1;
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int scl = -1;
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bool beginWire = true;
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};
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class TBeamClock {
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public:
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explicit TBeamClock(TwoWire& wire = Wire1);
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bool begin(const ClockConfig& config = ClockConfig{});
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void update();
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bool readRtc(DateTime& out, bool& lowVoltageFlag) const;
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bool readValidRtc(DateTime& out, int64_t* epochOut = nullptr) const;
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bool writeRtc(const DateTime& dt) const;
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bool ready() const { return ready_; }
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bool valid() const { return valid_; }
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bool lowVoltage() const { return lowVoltage_; }
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const DateTime& lastRtc() const { return lastRtc_; }
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int64_t lastEpoch() const { return lastEpoch_; }
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const char* lastError() const { return lastError_; }
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static bool isValidDateTime(const DateTime& dt);
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static int64_t toEpochSeconds(const DateTime& dt);
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static bool fromEpochSeconds(int64_t seconds, DateTime& out);
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static void formatIsoUtc(const DateTime& dt, char* out, size_t outSize);
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static void formatCompactUtc(const DateTime& dt, char* out, size_t outSize);
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static void makeRunId(const DateTime& dt, const char* boardId, char* out, size_t outSize);
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static bool parseDateTime(const char* text, DateTime& out);
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private:
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static uint8_t toBcd(uint8_t value);
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static uint8_t fromBcd(uint8_t value);
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static bool isLeapYear(uint16_t year);
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static uint8_t daysInMonth(uint16_t year, uint8_t month);
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static int64_t daysFromCivil(int year, unsigned month, unsigned day);
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void setError(const char* message) const;
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void clearError() const;
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TwoWire& wire_;
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ClockConfig config_{};
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bool ready_ = false;
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bool valid_ = false;
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bool lowVoltage_ = false;
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DateTime lastRtc_{};
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int64_t lastEpoch_ = 0;
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mutable char lastError_[128] = {};
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};
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} // namespace tbeam
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