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/**
* Dual sense: CDT→Signal/RX, RXD→Packet (HDLC 0x7E / edge activity).
* Status only — not a Host↔Chip data bridge.
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#ifndef S1224_SENSE_H
#define S1224_SENSE_H
#include <stdbool.h>
void sense_init(void);
/** Poll GPIO / heuristics; call from main loop (~10 ms). */
void sense_poll(void);
bool sense_signal_active(void); /* CDT carrier/tone */
bool sense_packet_active(void); /* RXD activity or flag seen (held) */
bool sense_packet_flag(void); /* last window saw 0x7E */
#endif
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