/// \file midi2stepper.h
/// \brief header file for Midi2Stepper class
/// \author GrumpyDeveloper https://contentnation.net/en/grumpydevelop
/// \license MIT

#ifndef MIDI2STEPPER_H_
#define MIDI2STEPPER_H_

// system includes
#include "Arduino.h"

class Midi2Stepper {
 public:
  /**
   * \brief constructor
   */
  Midi2Stepper();

  /**
   * \brief start up internal structures
   */
  void begin();

  /**
   * \brief set power state and enable or disable pulse generation
   *
   * \param status new power status
   */
  void power(bool status);

  /**
   * \brief tick function called by interrupt at 48kHz
  */
  void tick();

  /**
   * \brief set channel A frequency and direction
   *
   * \param channelNum channel number
   * \param freq frequency in Hz
   */
  void setChannel(uint8_t channelNum, uint16_t freq);

 private:
  uint16_t m_counterA;  ///< counter for toggling channels
  uint16_t m_counterB;  ///< counter for toggling channels
  uint16_t m_counterC;  ///< counter for toggling channels
  uint16_t m_counterD;  ///< counter for toggling channels
  uint16_t m_counterE;  ///< counter for toggling channels
  uint16_t m_counterF;  ///< counter for toggling channels
  uint16_t m_counterG;  ///< counter for toggling channels
  uint16_t m_counterH;  ///< counter for toggling channels

  volatile uint8_t m_enable;  ///< which channels are enable, one bit per channel
  volatile uint16_t m_cEndA;  ///< toggle output when m_counter reaches this
  volatile uint16_t m_cEndB;  ///< toggle output when m_counter reaches this
  volatile uint16_t m_cEndC;  ///< toggle output when m_counter reaches this
  volatile uint16_t m_cEndD;  ///< toggle output when m_counter reaches this
  volatile uint16_t m_cEndE;  ///< toggle output when m_counter reaches this
  volatile uint16_t m_cEndF;  ///< toggle output when m_counter reaches this
  volatile uint16_t m_cEndG;  ///< toggle output when m_counter reaches this
  volatile uint16_t m_cEndH;  ///< toggle output when m_counter reaches this
};

#endif  // MIDI2STEPPER_H_