Arduhdlc.h

#ifndef arduhdlc_h
#define arduhdlc_h

#include "Arduino.h"
#include <stdint.h>
#include <stdbool.h>

typedef void (*sendchar_type)(uint8_t);
typedef void (*frame_handler_type)(const uint8_t *framebuffer, uint16_t framelength);

class Arduhdlc
{
public:
  Arduhdlc(sendchar_type, frame_handler_type, uint16_t max_frame_length);
  void charReceiver(uint8_t data);
  void sendFrame(const uint8_t *framebuffer, uint8_t frame_length);

private:
  /* User must define a function, that sends a 8bit char over the chosen interface, usart, spi, i2c etc. */
  sendchar_type sendchar_function;
  /* User must define a function, that will process the valid received frame */
  /* This function can act like a command router/dispatcher */
  frame_handler_type frame_handler;
  void sendchar(uint8_t data);

  bool escape_character;
  uint8_t *receive_frame_buffer;
  uint8_t frame_position;
  // 16bit CRC sum for _crc_ccitt_update
  uint16_t frame_checksum;
  uint16_t max_frame_length;
};

#endif