BLOB Flash Memory
The BLOB Flash Memory readers and writer enable the reading and writing of BLOB data to the flash memory partitions defined in the flash map API:func:flash map <flash_map_api>.
BLOB Flash Reader
The BLOB Flash Reader interacts with the BLOB Transfer Client to read BLOB data directly from flash memory.
It must be initialized by calling bt_mesh_blob_flash_rd_init() before being passed to the
BLOB Transfer Client. Each BLOB Flash Reader only supports one transfer at the time.
BLOB Flash Writer
The BLOB Flash Writer interacts with the BLOB Transfer Server to write BLOB data directly to flash.
It must be initialized by calling bt_mesh_blob_flash_rd_init() before being passed to the
BLOB Transfer Server. Each BLOB Flash Writer only supports one transfer at the time, and requires a
block size that is a multiple of the flash page size. If a transfer is started with a block size
lower than the flash page size, the transfer will be rejected.
The BLOB Flash Writer copies block data into a buffer to accommodate blocks that are aligned with
the flash write block size. The buffer data is padded with 0xff if either the start or length of
the chunk is unaligned.
API Reference
- group bt_mesh_blob_io_flash
Functions
-
int bt_mesh_blob_io_flash_init(struct bt_mesh_blob_io_flash *flash, uint8_t area_id, off_t offset)
Initialize a flash stream.
- Parameters:
flash – Flash stream.
area_id – Flash partition identifier. See flash_area_open.
offset – Offset into the flash area, in bytes.
- Returns:
0 on success or (negative) error code otherwise.
-
struct bt_mesh_blob_io_flash
BLOB flash stream.
-
int bt_mesh_blob_io_flash_init(struct bt_mesh_blob_io_flash *flash, uint8_t area_id, off_t offset)