Node / markqvist / OpenModem.git / files / protocol / AX25.h

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#ifndef PROTOCOL_AX25_H

#define PROTOCOL_AX25_H

#include <stdio.h>

#include <stdbool.h>

#include "device.h"

#include "hardware/AFSK.h"

#define AX25_MIN_FRAME_LEN 1

#define AX25_MAX_FRAME_LEN 1532

#define AX25_CRC_CORRECT 0xF0B8

#define AX25_CTRL_UI 0x03

#define AX25_PID_NOLAYER3 0xF0

struct AX25Ctx; // Forward declarations

struct AX25Msg;

typedef void (*ax25_callback_t)(struct AX25Ctx *ctx);

typedef struct AX25Ctx {

uint8_t buf[AX25_MAX_FRAME_LEN];

Afsk *modem;

FILE *ch;

size_t frame_len;

uint16_t crc_in;

uint16_t crc_out;

ax25_callback_t hook;

bool sync;

bool escape;

bool ready_for_data;

} AX25Ctx;

void ax25_poll(AX25Ctx *ctx);

void ax25_sendRaw(AX25Ctx *ctx, void *_buf, size_t len);

void ax25_init(AX25Ctx *ctx, Afsk *modem, FILE *channel, ax25_callback_t hook);

#endif