#ifndef DLDEF
#define DLDEF


#define FRAME_SIZE		32
#define FRAME_LOAD_SIZE	FRAME_SIZE - 7
#define FRAME_START		0xFC
#define FRAME_STOP		0xFD

#define DATA	0
#define ACK		1

typedef struct{
	unsigned char from;
	unsigned char to;
	unsigned char kind;
	unsigned char frameNumber;
	unsigned char checkSum;
	unsigned char load[FRAME_LOAD_SIZE];
}FRAME;

#include "mac.h"
#include "transport.h"

unsigned char datalinkInit();
void dataLinkSend(unsigned char a, unsigned char* t, unsigned int length);
void dataLinkReceive(unsigned char* f);
unsigned char getCheckSum(unsigned char[FRAME_LOAD_SIZE]);
char sendFrame(unsigned char a, FRAME f);
void errorUp();
void dataLinkMsg2Stream(TRANS_MSG* m, unsigned char* s);
void dataLinkStream2Msg(unsigned char* s, FRAME* f);
void dataLinkFrame2Stream(FRAME* f, unsigned char* s);

#endif