// --------------------------------------------------------------
#ifndef FRAME_H
#define	FRAME_H

#include "radio_types.h"
#include "cpx.h"

// --------------------------------------------------------------
// Constants
// --------------------------------------------------------------
#define FRAME_CRC16_IV				0x0000
#define FRAME_CRC16_POLY			0x1021
#define FRAME_PREAMBLE_IV			0x55
#define FRAME_SCRAMBLER_SEED		0x12345678
#define FRAME_SCRAMBLER_POLY		0x80C18601
#define	FRAME_NUM_BYTES_PER_FRAME	32
#define	FRAME_TYPE_IDLE				0x01
#define	FRAME_TYPE_DATA				0x02

// --------------------------------------------------------------
// Types
// --------------------------------------------------------------
typedef struct _frame_hdr_t
{
	uint8_t preamble[2];
	uint32_t prn_state;
	uint16_t crc16;
	uint16_t type;
	uint16_t length;

} frame_hdr_t;

typedef struct _frame_t
{
	frame_hdr_t hdr;
	uint8_t data[FRAME_NUM_BYTES_PER_FRAME];

} frame_t;

// --------------------------------------------------------------
// Functions
// --------------------------------------------------------------
#ifdef __cplusplus
extern "C" {
#endif

uint32_t Scramble(uint8_t *pSrcDst, uint32_t state, uint32_t poly, uint32_t len);
uint32_t FrameCalcNumStreamBytes(uint32_t len_raw);
uint32_t FrameFormat(uint8_t *pRaw, uint8_t *pFormatted, uint32_t len_raw, uint32_t *pPrn_state, uint16_t frame_type);
uint32_t FrameDeformat(uint8_t *pFormatted, uint8_t *pRaw, uint32_t len_formatted, uint16_t frame_type);
uint32_t FrameSerialize(uint8_t *pSrc, uint8_t *pDst, uint32_t nBitsPerSym, uint32_t srclen);
uint32_t FrameDeSerialize(uint8_t *pSrc, uint8_t *pDst, uint32_t nBitsPerSym, uint32_t srclen, uint16_t frame_type);
uint32_t FrameSymbolsMap(uint8_t *pBits, cpx_t *pSym, uint32_t nBitsPerSym, uint32_t num_syms, uint32_t type);
uint32_t FrameSymbolsDemap(cpx_t *pSym, uint8_t *pBits, uint32_t nBitsPerSym, uint32_t num_syms, uint32_t type);

#ifdef __cplusplus
}
#endif  // __cplusplus

// --------------------------------------------------------------
#endif // FRAME_H