File content as of revision 0:97661408d0f9:

#ifndef __LTCDECODE_H__
#define __LTCDECODE_H__

#include "mbed.h"

  const uint32_t minBitPeriodUS =
      (uint32_t)((1000000.0f / 2400) / 1.1f); // allow for 10% time error
  const uint32_t maxMidSymbolTimeUS = (uint32_t)(
      ((1000000.0f / (1920 * 2))) * 1.1f); // allow for 10% time error

class LTCDecode {

public:
  LTCDecode(const PinName pin);
  void setInputTimer(Timer *inputTimer);

  bool synced() { return LTCsynced; };

  // reads pending data up to a sync marker, returns true is sync is found.
  bool searchForSync();

  // reads pending data up to the end of the frame, returns true at the end of a
  // frame. check sync stats and lastFrameData for results.
  bool readWaitingData();

  typedef struct {
    int hours;
    int minutes;
    int seconds;
    int frame;
    bool frameDrop;
    uint32_t frameStartTime;
  } LTCData_t;

  const LTCData_t *getLastFrame() { return &lastFrame; };

  // buffer holding received LTC bits and their start times.

private:
  void LTCOnEdge(void);

  InterruptIn _LTCIn;
  Timer *_inputTimer;

  LTCData_t lastFrame;

  static const int _newBitBufferSize_ = 80;

  bool newBitBuffer[_newBitBufferSize_];
  uint32_t bitTimes[_newBitBufferSize_];

  bool LTCsynced;

  volatile int newBitsWrite;
  int newBitsRead;

  // max bit period = 520.8 ms (1920 Hz)
  // min bit period = 416.7 ms (2400 Hz)
  // max period of a '1' symbol = 260.4ms (1920Hz * 2)

  uint32_t lastTransition;
  uint32_t lastBitStart;

  uint32_t LTCBuffer[3];
  uint32_t firstMark;
  int markCount;
  uint32_t nextSecondStart;
  uint32_t PPSWidth;
  int bitCounter ;
  int dwordCounter ;

  uint32_t timeOfBit, frameStartTime;
};

#endif