Flash image API

Abstraction layer to write firmware images to flash. More...

Data Structures
struct	flash_img_context
struct	flash_img_check
	Structure for verify flash region integrity. More...

Functions
int	flash_img_init_id (struct flash_img_context *ctx, uint8_t area_id)
	Initialize context needed for writing the image to the flash.
int	flash_img_init (struct flash_img_context *ctx)
	Initialize context needed for writing the image to the flash.
size_t	flash_img_bytes_written (struct flash_img_context *ctx)
	Read number of bytes of the image written to the flash.
int	flash_img_buffered_write (struct flash_img_context *ctx, const uint8_t *data, size_t len, bool flush)
	Process input buffers to be written to the image slot 1.
int	flash_img_check (struct flash_img_context *ctx, const struct flash_img_check *fic, uint8_t area_id)
	Verify flash memory length bytes integrity from a flash area.

Detailed Description

Abstraction layer to write firmware images to flash.

Function Documentation

flash_img_buffered_write()

int flash_img_buffered_write	(	struct flash_img_context *	ctx,
		const uint8_t *	data,
		size_t	len,
		bool	flush )

#include <zephyr/dfu/flash_img.h>

Process input buffers to be written to the image slot 1.

flash memory in single blocks. Will store remainder between calls.

A final call to this function with flush set to true will write out the remaining block buffer to flash. Since flash is written to in blocks, the contents of flash from the last byte written up to the next multiple of CONFIG_IMG_BLOCK_BUF_SIZE is padded with 0xff.

Parameters

ctx	context
data	data to write
len	Number of bytes to write
flush	when true this forces any buffered data to be written to flash

Returns

0 on success, negative errno code on fail

flash_img_bytes_written()

size_t flash_img_bytes_written

(

struct flash_img_context *

ctx

)

#include <zephyr/dfu/flash_img.h>

Read number of bytes of the image written to the flash.

Parameters

ctx

context

Returns

Number of bytes written to the image flash.

flash_img_check()

int flash_img_check	(	struct flash_img_context *	ctx,
		const struct flash_img_check *	fic,
		uint8_t	area_id )

#include <zephyr/dfu/flash_img.h>

Verify flash memory length bytes integrity from a flash area.

The start point is indicated by an offset value.

The function is enabled via CONFIG_IMG_ENABLE_IMAGE_CHECK Kconfig options.

Parameters

[in]	ctx	context.
[in]	fic	flash img check data.
[in]	area_id	flash area id of partition where the image should be verified.

Returns

0 on success, negative errno code on fail

flash_img_init()

int flash_img_init

(

struct flash_img_context *

ctx

)

#include <zephyr/dfu/flash_img.h>

Initialize context needed for writing the image to the flash.

Parameters

ctx	context to be initialized

Returns

0 on success, negative errno code on fail

flash_img_init_id()

int flash_img_init_id	(	struct flash_img_context *	ctx,
		uint8_t	area_id )

#include <zephyr/dfu/flash_img.h>

Initialize context needed for writing the image to the flash.

Parameters

ctx	context to be initialized
area_id	flash area id of partition where the image should be written

Returns

0 on success, negative errno code on fail