hid_global_reader.h

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#pragma once

#include "hid_global_tag_id.h"
#include "wiegand_reader.h"

#include <atomic>
#include <experimental/optional>

class HIDGlobalReader
//: private WiegandReader
: public WiegandReader
{
public:
  using MaybeTagId = std::experimental::optional<HIDGlobalTagID>;

  explicit HIDGlobalReader(const WiegandReader::Config& config) noexcept;

  enum class ScanState
  {
    IsScanningHold,
    IsScanningTag,
    IsScanningComplete,
  };

  auto scan_tag()
    -> MaybeTagId;

  auto beep(TimeDuration duration)
    -> void;

  auto IRAM_ATTR scanning_fsm()
    -> void;

  //std::atomic<HIDGlobalTagID> last_scanned_tag;
  MaybeTagId last_scanned_tag;

protected:
  ScanState scan_state = ScanState::IsScanningHold;
};