235 lines
7.1 KiB
Plaintext
235 lines
7.1 KiB
Plaintext
# Copyright (c) 2016 Intel Corporation
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# Copyright (c) 2020 Nordic Semiconductor ASA
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# Copyright (c) 2023 Husqvarna AB
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# SPDX-License-Identifier: Apache-2.0
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config FAT_FILESYSTEM_ELM
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bool "ELM FAT file system support"
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depends on FILE_SYSTEM
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select DISK_ACCESS
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help
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Use the ELM FAT File system implementation.
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if FAT_FILESYSTEM_ELM
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menu "ELM FAT file system settings"
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visible if FAT_FILESYSTEM_ELM
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config FS_FATFS_READ_ONLY
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bool "Read-only support for all volumes"
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help
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Excludes write code from ELM FAT file system driver.
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Select this when using FAT for read-only access to slightly
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reduce code size.
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This option affects FF_FS_READONLY defined in ffconf.h, inside
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ELM FAT module.
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config FS_FATFS_MKFS
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bool
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help
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Adds code for creating disks with FAT file system.
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This option affects FF_USE_MKFS defined in ffconf.h, inside
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ELM FAT module.
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config FS_FATFS_MOUNT_MKFS
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bool "Allow formatting volume when mounting fails"
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default y
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select FS_FATFS_MKFS
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help
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This option adds code that allows fs_mount to attempt to format
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a volume if no file system is found.
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If formatting is not needed, disabling this flag will slightly
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reduce application size.
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Note: This option is destructive to data and will automatically
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destroy your disk, if mount attempt fails. In case when your
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disk can be detached from a device and recovered using other
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system, it may be worth disabling this option.
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When this option is disabled, disk needs to be FAT formatted
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prior to connecting to a device, otherwise it will not be
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mountable.
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if FS_FATFS_MOUNT_MKFS
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config FS_FATFS_MAX_ROOT_ENTRIES
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int "Max number of entries in FAT FS root directory"
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default 512
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range 1 32768
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help
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Sets how many root directory entries will be allocated when
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formatting new FAT system to a device.
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Note that this should be multiply of FS_FATFS_MAX_SS / 32.
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endif # FS_FATFS_MOUNT_MKFS
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config FS_FATFS_EXFAT
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bool "ExFAT support"
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select FS_FATFS_LFN
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help
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Enable the exFAT format support for FatFs.
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config FS_FATFS_NUM_FILES
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int "Maximum number of opened files"
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default 4
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help
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Affects how many file objects area available for parallel
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use by FAT driver. Each object is of size sizeof(FIL), where
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FIL is defined in ff.h of ELM FAT driver, and is pre-allocated
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at compile-time.
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This affects use of fs_open on FAT type mounted file systems.
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config FS_FATFS_NUM_DIRS
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int "Maximum number of opened directories"
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default 4
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help
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Affects how many directory objects area available for parallel
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use by FAT driver. Each object is of size sizeof(DIR), where
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DIR is defined in ff.h of ELM FAT driver, and is pre-allocated
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at compile-time.
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This affects use of fs_opendir on FAT type mounted file systems.
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config FS_FATFS_LFN
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bool "Long filenames (LFN)"
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help
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Without long filenames enabled, file names are limited to 8.3 format.
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This option increases working buffer size.
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if FS_FATFS_LFN
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choice FS_FATFS_LFN_MODE
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prompt "LFN memory mode"
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default FS_FATFS_LFN_MODE_BSS
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config FS_FATFS_LFN_MODE_BSS
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bool "Static buffer"
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help
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Enable LFN with static working buffer on the BSS. Always NOT thread-safe.
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This option affects FF_USE_LFN defined in ffconf.h, inside
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ELM FAT module, by setting its value to 1.
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config FS_FATFS_LFN_MODE_STACK
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bool "Stack buffer"
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help
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Enable LFN with dynamic working buffer on the STACK.
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This option affects FF_USE_LFN defined in ffconf.h, inside
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ELM FAT module, by setting its value to 2.
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config FS_FATFS_LFN_MODE_HEAP
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bool "Heap buffer"
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depends on HEAP_MEM_POOL_SIZE > 0
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help
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Enable LFN with dynamic working buffer on the HEAP.
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This option affects FF_USE_LFN defined in ffconf.h, inside
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ELM FAT module, by setting its value to 3.
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endchoice
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config FS_FATFS_FF_USE_LFN
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int
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default 1 if FS_FATFS_LFN_MODE_BSS
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default 2 if FS_FATFS_LFN_MODE_STACK
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default 3 if FS_FATFS_LFN_MODE_HEAP
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help
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Translates FS_FATFS_LFN_MODE selection to FF_USE_LFN, defined in ffconf.h,
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inside ELM FAT module.
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config FS_FATFS_MAX_LFN
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int "Max filename length"
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range 12 255
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default 255
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help
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The working buffer occupies (FS_FATFS_MAX_LFN + 1) * 2 bytes and
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additional 608 bytes at exFAT enabled.
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It should be set 255 to support full featured LFN operations.
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endif # FS_FATFS_LFN
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config FS_FATFS_CODEPAGE
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int "FatFS code page (character set)"
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default 437
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help
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Valid code page values:
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437 - U.S.
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720 - Arabic
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737 - Greek
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771 - KBL
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775 - Baltic
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850 - Latin 1
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852 - Latin 2
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855 - Cyrillic
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857 - Turkish
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860 - Portuguese
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861 - Icelandic
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862 - Hebrew
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863 - Canadian French
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864 - Arabic
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865 - Nordic
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866 - Russian
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869 - Greek 2
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932 - Japanese (DBCS)
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936 - Simplified Chinese (DBCS)
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949 - Korean (DBCS)
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950 - Traditional Chinese (DBCS)
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0 - Include all supported code pages
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This option affects FF_CODE_PAGE defined in ffconf.h, inside
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ELM FAT module.
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config FS_FATFS_MAX_SS
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int "Maximum supported sector size"
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range 512 4096
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default 512
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help
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Value set here will be used as maximum supported read/write
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sector size, with 512 being minimum value.
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Option affects write/read granularity and will increase
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size of buffers used by FAT driver, which in practice affects
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how much RAM each FATFS object, used with FAT mount point,
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requires, which is this value plus some constant amount,
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independent from this setting.
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This will affect your compile time RAM allocation, when
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mount point is defined as static/global life time variable,
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or stack.
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When this value is set to 512, all mount points will use
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512 as sector size, all other values will cause FAT driver
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to query device for sector size on mount.
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This option affects FF_MAX_SS defined in ffconf.h, inside
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ELM FAT module.
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config FS_FATFS_MIN_SS
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int "Minimum expected sector size"
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range 512 FS_FATFS_MAX_SS
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default 512
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help
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Specifies minimum sector size the FAT FS driver is expected to
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support. Set this to FS_FATFS_MAX_FS when you have single
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device with FAT FS or all connected devices use the same
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sector size, to have slight reduction in code in FAT FS driver.
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The reduction comes from the fact that FAT FS does not have to
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query every connected device for sector size.
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This option affects FF_MIN_SS defined in ffconf.h, inside
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ELM FAT module.
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config FS_FATFS_WINDOW_ALIGNMENT
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int "Memory alignment for the member \"win\" in FATFS"
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default 1
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help
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Specifies alignment, in bytes of FAT FS window buffer that is
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used for device's read/write operations. MMC controllers may
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require read/write buffer to start at memory address with
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specific alignment, for example 16 or 512 bytes, the value
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provided here is used as such alignment. Note that the window
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buffer is internal element of FATFS structure, which means
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that, in worst scenario, value provided here may cause FATFS
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structure to have size of twice the value.
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config FS_FATFS_REENTRANT
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bool "FatFs reentrant"
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depends on !FS_FATFS_LFN_MODE_BSS
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help
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Enable the FatFs re-entrancy (thread safe) option for file/directory
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access for each volume. Will create a zephyr mutex object for each
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FatFs volume and a FatFs system mutex.
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endmenu
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endif # FAT_FILESYSTEM_ELM
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