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# Copyright (c) 2018 Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0
menuconfig SETTINGS
bool "Settings"
help
The settings subsystem allows its users to serialize and
deserialize state in memory into and from non-volatile memory.
It supports several back-ends to store and load serialized data from
and it can do so atomically for all involved modules.
if SETTINGS
module = SETTINGS
module-str = settings
source "subsys/logging/Kconfig.template.log_config"
config SETTINGS_RUNTIME
bool "runtime storage back-end"
help
Enables runtime storage back-end.
config SETTINGS_DYNAMIC_HANDLERS
bool "dynamic settings handlers"
default y
help
Enables the use of dynamic settings handlers
# Hidden option to enable encoding length into settings entry
config SETTINGS_ENCODE_LEN
bool
choice SETTINGS_BACKEND
prompt "Storage back-end"
default SETTINGS_NVS if NVS
default SETTINGS_FCB if FCB
default SETTINGS_FILE if FILE_SYSTEM
default SETTINGS_NONE
help
Storage back-end to be used by the settings subsystem.
config SETTINGS_FCB
bool "FCB"
depends on FCB
help
Use FCB as a settings storage back-end.
config SETTINGS_FILE
bool "File"
depends on FILE_SYSTEM
select SETTINGS_ENCODE_LEN
help
Use a file (on mounted file system) as a settings storage back-end.
config SETTINGS_NVS
bool "NVS non-volatile storage support"
depends on NVS
depends on FLASH_MAP
help
Enables NVS storage support
if SETTINGS_NVS
config SETTINGS_NVS_NAME_CACHE
bool "NVS name lookup cache"
help
Enable NVS name lookup cache, used to reduce the Settings name
lookup time.
config SETTINGS_NVS_NAME_CACHE_SIZE
int "NVS name lookup cache size"
default 128
range 1 65535
depends on SETTINGS_NVS_NAME_CACHE
help
Number of entries in Settings NVS name cache.
endif # SETTINGS_NVS
config SETTINGS_CUSTOM
bool "CUSTOM"
help
Use a custom settings storage back-end.
config SETTINGS_NONE
bool "NONE"
help
No storage back-end.
endchoice
config SETTINGS_FCB_NUM_AREAS
int "Number of flash areas used by the settings subsystem"
default 8
depends on SETTINGS_FCB
help
Number of areas to allocate in the settings FCB. A smaller number is
used if the flash hardware cannot support this value.
config SETTINGS_FCB_MAGIC
hex "FCB magic for the settings subsystem"
default 0xc0ffeeee
depends on SETTINGS_FCB
help
Magic 32-bit word for to identify valid settings area
config SETTINGS_FILE_PATH
string "Default settings file"
default "/settings/run"
depends on SETTINGS_FILE
help
Full path to the default settings file.
config SETTINGS_FILE_MAX_LINES
int "Compression threshold"
default 32
depends on SETTINGS_FILE
help
Limit how many items stored in a file before compressing
config SETTINGS_NVS_SECTOR_SIZE_MULT
int "Sector size of the NVS settings area"
default 1
depends on SETTINGS_NVS
help
The sector size to use for the NVS settings area as a multiple of
FLASH_ERASE_BLOCK_SIZE.
config SETTINGS_NVS_SECTOR_COUNT
int "Sector count of the NVS settings area"
default 8
depends on SETTINGS_NVS
help
Number of sectors used for the NVS settings area
config SETTINGS_SHELL
bool "Settings shell"
depends on SHELL
help
Enable shell commands for listing and reading the settings. Note that
reading the settings requires quite a big stack buffer, so the stack
size of the shell thread may need to be increased to accommodate this
feature.
endif # SETTINGS