#ifndef INC_EEPROM_H_
#define INC_EEPROM_H_

#include "stm32f4xx_hal.h"
#include "stm32f4xx_hal_def.h"

#define EEPROM_BASE_ADDR 0b1010000
// Device address must be shifted left before being passed to the HAL
#define EEPROM_DEV_ADDR (EEPROM_BASE_ADDR << 1)
#define EEPROM_TIMEOUT 200 /* ms */
#define EEPROM_READ_TRIES 5

#define EEPROM_ADDR_SLAVE_ID 0x000

typedef enum { EEPROM_OFF, EEPROM_READY, EEPROM_ERROR } EEPROM_State;
extern EEPROM_State eeprom_state;

void eeprom_init(I2C_HandleTypeDef* handle);

/**
 * @brief Write a byte to the EEPROM.
 *
 * @param addr 9-bit address (1 bit page select + 8 bit address)
 * @param data The byte to write
 */
HAL_StatusTypeDef eeprom_write(uint16_t addr, uint8_t data);
/**
 * @brief Read a byte from the next address in the EEPROM.
 *
 * @param data 1-byte buffer into which the read byte is written.
 */
HAL_StatusTypeDef eeprom_read_curr(uint8_t* data);
/**
 * @brief Read a byte from the EEPROM (random-access).
 *
 * @param addr 9-bit address (1 bit page select + 8 bit address)
 * @param data 1-byte buffer into which the read byte is written.
 */
HAL_StatusTypeDef eeprom_read_random(uint16_t addr, uint8_t* data);

#endif // INC_EEPROM_H_