Implementation of a generic external SPI flash driver. More...

#include "contiki.h"
#include "dev/storage/ext-flash/ext-flash.h"
#include "dev/spi.h"
#include "gpio-hal.h"
#include "sys/log.h"
#include <stdint.h>
#include <stdbool.h>

Macros
#define	BLS_CODE_PROGRAM 0x02
	Page Program.

#define	BLS_CODE_READ 0x03
	Read Data.

#define	BLS_CODE_READ_STATUS 0x05
	Read Status Register.

#define	BLS_CODE_WRITE_ENABLE 0x06
	Write Enable.

#define	BLS_CODE_SECTOR_ERASE 0x20
	Sector Erase.

#define	BLS_CODE_MDID 0x90
	Manufacturer Device ID.

#define	BLS_CODE_PD 0xB9
	Power down.

#define	BLS_CODE_RPD 0xAB
	Release Power-Down.

#define	BLS_CODE_ERASE_4K 0x20
	Sector Erase.

#define	BLS_CODE_ERASE_ALL 0xC7
	Mass Erase.

#define	BLS_STATUS_BIT_BUSY 0x01
	Busy bit of the status register.

Functions
static const spi_device_t *	get_spi_conf (const spi_device_t *conf)
	Get spi configuration, return default configuration if NULL.

static bool	select_on_bus (const spi_device_t *flash_spi_configuration)
	Clear external flash CSN line.

static void	deselect (const spi_device_t *flash_spi_configuration)
	Set external flash CSN line.

static bool	wait_ready (const spi_device_t *flash_spi_configuration)
	Wait till previous erase/program operation completes.

static uint8_t	verify_part (const spi_device_t *flash_spi_configuration)
	Verify the flash part.

static bool	power_down (const spi_device_t *flash_spi_configuration)
	Put the device in power save mode.

static bool	power_standby (const spi_device_t *flash_spi_configuration)
	Take device out of power save mode and prepare it for normal operation.

static bool	write_enable (const spi_device_t *flash_spi_configuration)
	Enable write.

bool	ext_flash_open (const spi_device_t *conf)
	Initialize storage driver.

bool	ext_flash_close (const spi_device_t *conf)
	Close the storage driver.

bool	ext_flash_read (const spi_device_t conf, uint32_t offset, uint32_t length, uint8_t buf)
	Read storage content.

bool	ext_flash_write (const spi_device_t conf, uint32_t offset, uint32_t length, const uint8_t buf)
	Write to storage sectors.

bool	ext_flash_erase (const spi_device_t *conf, uint32_t offset, uint32_t length)
	Erase storage sectors corresponding to the range.

bool	ext_flash_init (const spi_device_t *conf)
	Initialise the external flash.

Detailed Description

Implementation of a generic external SPI flash driver.

Definition in file ext-flash.c.

Macros

Functions

Detailed Description