OpenModem/protocol/AX25.h

43 lines
931 B
C
Executable File

#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 18
#ifndef CUSTOM_FRAME_SIZE
#define AX25_MAX_FRAME_LEN 792
#else
#define AX25_MAX_FRAME_LEN CUSTOM_FRAME_SIZE
#endif
#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