raspikeyer/src/keyer.h

#ifndef KEYER_H
#define KEYER_H

#include "sidetone.h"

extern const uint BUZZER_PIN;

class Keyer final
{
public:
    enum class State
    {
        Wait,
        Dit,
        Dah,
        InterCharSpace,
        // TODO: perhaps new state: Keying
    };
    Keyer(uint8_t wpm);

    void run();

private:
    enum class Symbol
    {
        Dit,
        Dah
    };
    Keyer(){};
    State state{State::Wait};
    State m_previousState{State::Wait};
    uint8_t m_wpm{18};
    uint64_t m_elementDuration{0};
    bool m_currentlyKeying{false};
    absolute_time_t m_keying_until{0};
    absolute_time_t m_pausing_until{0};
    Symbol m_lastSymbolWas{Symbol::Dit};
    Sidetone m_Sidetone{BUZZER_PIN};
};

#endif