Protocol rework

sbc_fw/eeprom.h

@@ -1,6 +1,16 @@
 /*
  * @file eeprom.h
- * @brief EEPROM management for persistent settings
+ * @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
@@ -17,30 +27,16 @@
 #include <stdint.h>
 
 /**
- * @brief Potentiometer settings structure
- */
-typedef struct {
-	uint8_t hv_pot;	 ///< High voltage potentiometer value
-	uint8_t amp_pot; ///< SiPM Pre-amp gain potentiometer value
-	uint8_t det_pot; ///< Detection threshold potentiometer value
-} potentiometer_settings_t;
-
-/**
- * @brief Initialize EEPROM settings
- * Sets default values if EEPROM is uninitialized
+ * @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 Load potentiometer settings from EEPROM
- * @param settings Pointer to settings structure to populate
+ * @brief Persist the current global @c config to the alternate partition,
+ *        bumping the generation counter to flip the active partition.
  */
-void eeprom_load_pot_settings(potentiometer_settings_t *settings);
+void eeprom_save_config(void);
 
-/**
- * @brief Save potentiometer settings to EEPROM
- * @param settings Pointer to settings structure to save
- */
-void eeprom_save_pot_settings(const potentiometer_settings_t *settings);
-
-#endif // DET_EEPROM_H
+#endif /* DET_EEPROM_H */