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/**
* Softmodem AFSK — PWM/DDS TX + Goertzel RX (ADC when wired).
* Profile tones selected at compile time via S1224_BITRATE=300|1200|2400.
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#ifndef S1224_AFSK_SOFT_H
#define S1224_AFSK_SOFT_H
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#ifndef S1224_BITRATE
#define S1224_BITRATE 1200
#endif
void afsk_soft_init(void);
/** Transmit HDLC info payload (AX.25 frame without flags/FCS). Auto-PTT. */
bool afsk_tx_frame(const uint8_t *info, size_t info_len);
typedef void (*afsk_rx_frame_fn)(const uint8_t *info, size_t len);
void afsk_rx_set_callback(afsk_rx_frame_fn fn);
void afsk_rx_poll(void);
bool afsk_tx_busy(void);
unsigned afsk_bitrate(void);
/** Carrier/energy sense for UI (softmodem — not chip CDT). */
bool afsk_rx_carrier_active(void);
#endif /* S1224_AFSK_SOFT_H */
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