raspikeyer/src/keyer.h

#ifndef KEYER_H
#define KEYER_H

class Keyer final
{
public:
    enum class State
    {
        Wait,
        Dit,
        Dah,
        InterCharSpace,

    };

    void run();

private:
    State state{State::Wait};
    uint8_t numElements{0};
};

inline uint64_t element_duration_us(uint8_t wpm)
{
    uint64_t duration = static_cast<uint64_t>(1.2 / static_cast<uint64_t>(wpm) * 1000 * 1000);
    return duration;
}

#endif