/**
  ******************************************************************************
  * @file    nand_if.h
  * @author  MCD Application Team
  * @version V2.1.0
  * @date    02-August-2013
  * @brief   All functions related to the NAND process.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2013 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __NAND_IF_H
#define __NAND_IF_H

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"

/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
#define NAND_OK   0
#define NAND_FAIL 1

#define FREE_BLOCK  (1 << 12 )
#define BAD_BLOCK   (1 << 13 )
#define VALID_BLOCK (1 << 14 )
#define USED_BLOCK  (1 << 15 )

#define MAX_PHY_BLOCKS_PER_ZONE  1024
#define MAX_LOG_BLOCKS_PER_ZONE  1000

/* Private Structures---------------------------------------------------------*/
typedef struct __SPARE_AREA {
	uint16_t LogicalIndex;
	uint16_t DataStatus;
	uint16_t BlockStatus;
} SPARE_AREA;	

typedef enum {
  WRITE_IDLE = 0,
  POST_WRITE,
  PRE_WRITE,
  WRITE_CLEANUP,
  WRITE_ONGOING  
}WRITE_STATE;  

typedef enum {
  OLD_BLOCK = 0,
  UNUSED_BLOCK
}BLOCK_STATE; 

/* Private macro -------------------------------------------------------------*/
//#define WEAR_LEVELLING_SUPPORT
#define WEAR_DEPTH         10
#define PAGE_TO_WRITE      (Transfer_Length/512)

/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* exported functions --------------------------------------------------------*/
uint16_t Demo_NAND_Init (void);
uint16_t NAND_Write(uint32_t Memory_Offset, uint32_t *Writebuff, uint16_t Transfer_Length);
uint16_t NAND_Read(uint32_t Memory_Offset, uint32_t *Readbuff, uint16_t Transfer_Length);
uint16_t NAND_Format(void);
SPARE_AREA ReadSpareArea (uint32_t address);

#endif

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