/*
 * @file eeprom.h
 * @brief EEPROM management for persistent configuration storage.
 *
 * Dual-partition layout in ATmega4809 EEPROM (256 bytes):
 *
 *   [0 .. sizeof(config_t)]                              Partition A: config_t + 1-byte generation counter
 *   [sizeof(config_t)+1 .. 2*(sizeof(config_t)+1)-1]     Partition B: same layout
 *
 * On save, the alternate (older) partition is overwritten. If power fails
 * mid-write the other partition retains the last good config. The generation
 * counter wraps around uint8_t; the partition with the higher counter
 * (mod-256 comparison via signed delta) is the newer one.
 *
 * Created: 21.09.2025
 * Author: ThePetrovich
 *
 * Copyright YKSA - Sakha Aerospace Systems, LLC.
 * See the LICENSE file for details.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#ifndef DET_EEPROM_H
#define DET_EEPROM_H

#include <stdint.h>

/**
 * @brief Load the global @c config from EEPROM.
 *        Picks the freshest valid partition; writes factory defaults if both
 *        partitions are blank or corrupt.
 */
void eeprom_init(void);

/**
 * @brief Persist the current global @c config to the alternate partition,
 *        bumping the generation counter to flip the active partition.
 */
void eeprom_save_config(void);

#endif /* DET_EEPROM_H */