kopia lustrzana https://github.com/SP8EBC/ParaTNC
139 wiersze
3.8 KiB
C
139 wiersze
3.8 KiB
C
#ifndef AX25_H_
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#define AX25_H_
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#ifndef CCC
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#include "stm32f10x_conf.h"
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#endif
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#include <stdbool.h>
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#include "cfifo.h"
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#include "afsk.h"
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#include "macros.h"
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#include "config.h"
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/**
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* Maximum size of a AX25 frame.
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*/
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#define AX25_MIN_FRAME_LEN 18
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/**
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* CRC computation on correct AX25 packets should
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* give this result (don't ask why).
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*/
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#define AX25_CRC_CORRECT 0xF0B8
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#define AX25_CTRL_UI 0x03
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#define AX25_PID_NOLAYER3 0xF0
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#define HDLC_FLAG 0x7E
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#define HDLC_RESET 0x7F
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#define AX25_ESC 0x1B
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struct AX25Msg; // fwd declaration
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/**
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* Type for AX25 messages callback.
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*/
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typedef void (*ax25_callback_t)(struct AX25Msg *msg);
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typedef struct AX25Ctx
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{
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uint8_t buf[CONFIG_AX25_FRAME_BUF_LEN]; ///< buffer for received chars
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Afsk *afsk;
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uint16_t frm_len; ///< received frame length.
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uint16_t crc_in; ///< CRC for current received frame
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uint16_t crc_out; ///< CRC of current sent frame
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ax25_callback_t hook; ///< Hook function to be called when a message is received
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bool raw;
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bool sync; ///< True if we have received a HDLC flag.
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bool escape; ///< True when we have to escape the following char.
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uint8_t dcd_state;
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bool dcd;
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} AX25Ctx;
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/**
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* AX25 Call sign.
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*/
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typedef struct AX25Call
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{
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char call[6]; ///< Call string, max 6 character
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uint8_t ssid; ///< SSID (secondary station ID) for the call
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} AX25Call;
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/**
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* Create an AX25Call structure on the fly.
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* \param str callsign, can be 6 characters or shorter.
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* \param id ssid associated with the callsign.
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*/
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#define AX25_CALL(str, id) {.call = (str), .ssid = (id) }
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#define AX25_PATH(dst, src, ...) { dst, src, ## __VA_ARGS__ }
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/**
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* Maximum number of Repeaters in a AX25 message.
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*/
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#define AX25_MAX_RPT 8
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/**
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* AX25 Message.
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* Used to handle AX25 sent/received messages.
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*/
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typedef struct AX25Msg
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{
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AX25Call src; ///< Source adress
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AX25Call dst; ///< Destination address
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AX25Call rpt_lst[AX25_MAX_RPT]; ///< List of repeaters
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uint8_t rpt_cnt; ///< Number of repeaters in this message
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uint8_t rpt_flags; ///< Has-been-repeated flags for each repeater (bit-mapped)
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#define AX25_REPEATED(msg, idx) ((msg)->rpt_flags & BV(idx))
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uint16_t ctrl; ///< AX25 control field
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uint8_t pid; ///< AX25 PID field
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const uint8_t *info; ///< Pointer to the info field (payload) of the message
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uint16_t len; ///< Payload length
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char raw_data[CONFIG_AX25_FRAME_BUF_LEN]; /// Surowa zawarto<74><6F> ramki przekopiowana z Ctx->buff
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short int raw_msg_len; // wielkosc surowej ramki
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} AX25Msg;
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extern AX25Msg msg;
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extern char new_msg_rx;
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/*********************************************************************************************************************/
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void ax25_poll(AX25Ctx *ctx);
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/*********************************************************************************************************************/
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/*********************************************************************************************************************/
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void ax25_sendVia(AX25Ctx *ctx, const AX25Call *path, uint16_t path_len, const void *_buf, uint16_t len);
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/*********************************************************************************************************************/
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/*********************************************************************************************************************/
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void ax25_sendRaw(AX25Ctx *ctx, const void *_buf, uint16_t len);
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/*********************************************************************************************************************/
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/*********************************************************************************************************************/
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void ax25_init(AX25Ctx *ctx, Afsk *afsk, bool raw, ax25_callback_t hook);
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/*********************************************************************************************************************/
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#ifdef __cplusplus
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}
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#endif
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#endif /* AX25_H_ */
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