#ifndef ARDUINO_ANALOG_WAVE
#define ARDUINO_ANALOG_WAVE

#include "FspTimer.h"
#include "r_dtc.h"

#define SAMPLES_FOR_PREDEFINED_WAVE 24
#define WAVE_PRIORITY  1
#define WAVE_BUFFER_SIZE 1000

class analogWaveRev {
private:
  FspTimer timer;
  volatile uint32_t pin;
  uint16_t *buffer;

  uint8_t dac_bits;
  uint8_t *samples8;
  uint16_t *samples16;
  uint32_t size;
  volatile uint32_t index;
  volatile float _amplitude;
  volatile uint32_t _offset;

  uint16_t freq1, freq2;
  float delta_w1, delta_w2;
  float w1 = 0, w2 = 0;
  uint16_t wave_buffer[2][WAVE_BUFFER_SIZE];
  int current_wave = 0;
  uint16_t sample_rate;
  

  double freq_max;
  double dac_max_samp_rate;

  dtc_instance_ctrl_t dtc_ctrl;
  transfer_info_t dtc_info;
  dtc_extended_cfg_t dtc_cfg_extend;
  transfer_cfg_t dtc_cfg;

  void init(pin_size_t p);
  /* update the output with the next sample value */
  // bool update();
  void calc_wave(uint16_t *buf);

public:
  /* constructor 1 with only DAC pin (to be used when predefined waveform are used) */
  analogWaveRev(pin_size_t pinNumber);
  /* constructor 2 with buffer to be used (sample in buffer are output ciclycally */
  analogWaveRev(pin_size_t pinNumber, uint16_t *_buffer, uint32_t _size, uint32_t _offset);
  
  bool begin(uint16_t _sample_rate);
  /* updated the frequency used */
  bool freq(uint16_t _freq1_hz, uint16_t _freq2_hz);
  /* start the generation of sample */
  void start();
  /* stop the genration of sample */
  void stop();

  // void _pre_sync();

  // void sine(float freq_hz);

  void switch_buffer();
};

#endif