#ifndef PCMDMA_H
#define PCMDMA_H
#include "oneway.h"
#ifdef HAVE_CONFIG
/* Umožní použít externí parametry. */
#include "pwmconfig.h"
#else
static constexpr unsigned HALF_LEN = 0x40u;
static constexpr unsigned MAXPWM   = 2000u;
#endif
static constexpr unsigned FULL_LEN = 2u * HALF_LEN;
/* Používá TIM1, PWM kanál 1, DMA1 kanál 5, přerušení DMA1_Channel5_IRQHandler */
class PcmDma {
  uint16_t * const pL;
  uint16_t * const pH;
  uint16_t buffer [FULL_LEN];
  OneWay * src;
  public:
    explicit PcmDma () noexcept;
    uint16_t * getBuff () { return buffer; };
    void attach (OneWay & s) { src = & s; }
    void send (const bool b) {
      if (!src) return;
      if (b) src->Send (pH, HALF_LEN);
      else   src->Send (pL, HALF_LEN);
    }
};

#endif // PCMDMA_H