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DFU: add module for store the image

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Store image in sequence of certain blocks.
Module is intended to be use by a higher-level
image management protocol module

Signed-off-by: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Marti Bolivar <marti.bolivar@linaro.org>
Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>
This commit is contained in:
Andrzej Puzdrowski 2017-07-04 11:55:06 +02:00 • committed by Anas Nashif
commit 25c6610a65
5 changed files with 231 additions and 0 deletions
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63
include/dfu/flash_img.h Normal file
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/*
* Copyright (c) 2017 Nordic Semiconductor ASA
* Copyright (c) 2017 Linaro Limited
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef __FLASH_IMG_H__
#define __FLASH_IMG_H__
#ifdef __cplusplus
extern "C" {
#endif
struct flash_img_context {
u8_t buf[CONFIG_IMG_BLOCK_BUF_SIZE];
struct device *dev;
size_t bytes_written;
u16_t buf_bytes;
};
/**
* @brief Initialize context needed for writing the image to the flash.
*
* @param ctx context to be initialized
* @param dev flash driver to used while writing the image
*/
void flash_img_init(struct flash_img_context *ctx, struct device *dev);
/**
* @brief Read number of bytes of the image written to the flash.
*
* @param ctx context
*
* @return Number of bytes written to the image flash.
*/
size_t flash_img_bytes_written(struct flash_img_context *ctx);
/**
* @brief 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.
*
* @param ctx context
* @param data data to write
* @param len Number of bytes to write
* @param flush when true this forces any buffered
* data to be written to flash
*
* @return 0 on success, negative errno code on fail
*/
int flash_img_buffered_write(struct flash_img_context *ctx, u8_t *data,
size_t len, bool flush);
#ifdef __cplusplus
}
#endif
#endif /* __FLASH_IMG_H__ */