#pragma once
#include <string>
#include "types.hpp"

class PWM {
public:
    PWM(int chip, int channel, unsigned int period_ns);
    ~PWM();

    void setDutyCycle(unsigned int duty_ns);
    void setPeriod(unsigned int period_ns);
    void enable(bool on = true);
    void setPolarity(const char* pol = "normal");
    unsigned int readPeriod() const { return _period_ns; }

private:
    int          _chip;
    int          _channel;
    unsigned int _period_ns;
    bool         _exported;
    std::string  _basePath() const;
    void         _export();
    void         _unexport();
};