#ifndef NRF_FLASH_H__
#define NRF_FLASH_H__

#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include "boards.h"
#include "bsp.h"

#ifndef FLASH_PAGE_SIZE
#define FLASH_PAGE_SIZE    			4096
#endif
#define FLASH_BASE_ADDRESS    	0x6D000
#define FLASH_SIZE       				(FLASH_PAGE_SIZE<<1)

enum {
    WSYS_FLASH_OK = 0,
    WSYS_FLASH_INVALID_ADDRESS,
    WSYS_FLASH_INVALID_LENGTH
};

/*******************************************************************
* Function Nume: flash_write_data
* Descriptions : write data from flash
* In Para      : address: address to access(address must be word-aligned), length: length to be read(4 integer multiple)
* In-Out Para  : none
* Out Para     : data: data buffer to be read
* Return Value : FLASH_SUCCESS: success, FLASH_ERROR_INVALID_ADDRESS: address error
*******************************************************************/
uint8_t flash_write_data(uint32_t address, uint8_t *data, uint16_t length);

/*******************************************************************
* Function Nume: flash_read_data
* Descriptions : read data from flash
* In Para      : address: address to access(align=2), length: length to be read(4 integer multiple)
* In-Out Para  : none
* Out Para     : data: data buffer to be read
* Return Value : FLASH_SUCCESS: success, FLASH_ERROR_INVALID_ADDRESS: address error
*******************************************************************/
uint8_t flash_read_data(uint32_t address, uint32_t *data, uint16_t length);

/*******************************************************************
* Function Nume: flash_erase_data
* Descriptions : erase flash data
* In Para      : address: address to access(align=2), length: length to be erased(4 integer multiple)
* In-Out Para  : none
* Out Para     : none
* Return Value : FLASH_SUCCESS: success, FLASH_ERROR_INVALID_ADDRESS: address error
*******************************************************************/
uint8_t flash_erase_data(uint32_t address, uint16_t length);


#endif	//NRF_FLASH_H__