marlin/Marlin/src/HAL/HAL_STM32F7/EEPROM_Emul/eeprom_emul.h

/**
  ******************************************************************************
  * @file    EEPROM/EEPROM_Emulation/inc/eeprom.h
  * @author  MCD Application Team
  * @version V1.2.6
  * @date    04-November-2016
  * @brief   This file contains all the functions prototypes for the EEPROM
  *          emulation firmware library.
  ******************************************************************************
  * @attention
  *
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/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __EEEPROM_EMUL_H
#define __EEEPROM_EMUL_H

// --------------------------------------------------------------------------
// Includes
// --------------------------------------------------------------------------
#include "../../../inc/MarlinConfig.h"
#include "../../HAL.h"

/* Exported constants --------------------------------------------------------*/
/* EEPROM emulation firmware error codes */
#define EE_OK      (uint32_t)HAL_OK
#define EE_ERROR   (uint32_t)HAL_ERROR
#define EE_BUSY    (uint32_t)HAL_BUSY
#define EE_TIMEOUT (uint32_t)HAL_TIMEOUT

/* Define the size of the sectors to be used */
#define PAGE_SIZE               (uint32_t)0x4000  /* Page size = 16KByte */

/* Device voltage range supposed to be [2.7V to 3.6V], the operation will
   be done by word  */
#define VOLTAGE_RANGE           (uint8_t)VOLTAGE_RANGE_3

/* EEPROM start address in Flash */
#define EEPROM_START_ADDRESS  ((uint32_t)0x08100000) /* EEPROM emulation start address:
                                                  from sector2 : after 16KByte of used
                                                  Flash memory */

/* Pages 0 and 1 base and end addresses */
#define PAGE0_BASE_ADDRESS    ((uint32_t)(EEPROM_START_ADDRESS + 0x0000))
#define PAGE0_END_ADDRESS     ((uint32_t)(EEPROM_START_ADDRESS + (PAGE_SIZE - 1)))
#define PAGE0_ID               FLASH_SECTOR_1

#define PAGE1_BASE_ADDRESS    ((uint32_t)(EEPROM_START_ADDRESS + 0x4000))
#define PAGE1_END_ADDRESS     ((uint32_t)(EEPROM_START_ADDRESS + (2 * PAGE_SIZE - 1)))
#define PAGE1_ID               FLASH_SECTOR_2

/* Used Flash pages for EEPROM emulation */
#define PAGE0                 ((uint16_t)0x0000)
#define PAGE1                 ((uint16_t)0x0001) /* Page nb between PAGE0_BASE_ADDRESS & PAGE1_BASE_ADDRESS*/

/* No valid page define */
#define NO_VALID_PAGE         ((uint16_t)0x00AB)

/* Page status definitions */
#define ERASED                ((uint16_t)0xFFFF)     /* Page is empty */
#define RECEIVE_DATA          ((uint16_t)0xEEEE)     /* Page is marked to receive data */
#define VALID_PAGE            ((uint16_t)0x0000)     /* Page containing valid data */

/* Valid pages in read and write defines */
#define READ_FROM_VALID_PAGE  ((uint8_t)0x00)
#define WRITE_IN_VALID_PAGE   ((uint8_t)0x01)

/* Page full define */
#define PAGE_FULL             ((uint8_t)0x80)

/* Variables' number */
#define NB_OF_VAR             ((uint16_t)4096)

/* Exported types ------------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */
uint16_t EE_Initialise(void);
uint16_t EE_ReadVariable(uint16_t VirtAddress, uint16_t* Data);
uint16_t EE_WriteVariable(uint16_t VirtAddress, uint16_t Data);

#endif /* __EEEPROM_H */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/