OpenPuck/OpenPuck/bonds.h

// bonds.h -- the puck's bond slots + live link state.
//
// The real puck holds four controller bonds and exposes one HID control interface per slot (interface N owns
// slot N). We mirror that: g_slot[N] holds the bond record [8 uuid][16 serial] plus a staging buffer for that
// interface's pending feature-report reply (filled by puck_hid.cpp's command channel). Bonds persist to
// flash (bonds.bin). g_connReplyMs (per-slot, rf_link sets the active one) is the live RF link state, shared
// here so the USB feature handler can report per-slot connection status without depending on the RF layer.
#pragma once
#include <stdint.h>

#define NSLOT 4

// per-slot state (record = [8 uuid][16 serial]) + per-interface response staging
struct Slot {
	uint8_t rec[24];
	bool used;
	uint8_t resp[63];
	uint16_t resp_len;
};
extern Slot g_slot[NSLOT];

// Per-slot link state. g_connReplyMs[i] is the millis() of the last F-type reply on slot i (the
// "controller is alive" timestamp). g_linkRssi (rf_link.h) is also per-slot. Steam reads each slot's
// B4/0x79/0x7B against its own entry here, so the four interfaces present four independent controllers
// (each marked connected on its own).
extern unsigned long g_connReplyMs[NSLOT];
extern volatile bool g_dirty; // bonds changed -> flush to flash from loop()
extern bool g_pairing;

bool recEmpty(const uint8_t *r);
void loadBonds();
void saveBonds();
int bondedSlotCount();