esp-idf/components/fatfs/Kconfig

menu "FAT Filesystem support"

choice FATFS_CHOOSE_CODEPAGE
   prompt "OEM Code Page"
   default FATFS_CODEPAGE_437
   help
      OEM code page used for file name encodings.
      
      If "Dynamic" is selected, code page can be chosen at runtime using
      f_setcp function. Note that choosing this option will increase
      application size by ~480kB.

config FATFS_CODEPAGE_DYNAMIC
   bool "Dynamic (all code pages supported)"
config FATFS_CODEPAGE_437
   bool "US (CP437)"
config FATFS_CODEPAGE_720
   bool "Arabic (CP720)"
config FATFS_CODEPAGE_737
   bool "Greek (CP737)"
config FATFS_CODEPAGE_771
   bool "KBL (CP771)"
config FATFS_CODEPAGE_775
   bool "Baltic (CP775)"
config FATFS_CODEPAGE_850
   bool "Latin 1 (CP850)"
config FATFS_CODEPAGE_852
   bool "Latin 2 (CP852)"
config FATFS_CODEPAGE_855
   bool "Cyrillic (CP855)"
config FATFS_CODEPAGE_857
   bool "Turkish (CP857)"
config FATFS_CODEPAGE_860
   bool "Portugese (CP860)"
config FATFS_CODEPAGE_861
   bool "Icelandic (CP861)"
config FATFS_CODEPAGE_862
   bool "Hebrew (CP862)"
config FATFS_CODEPAGE_863
   bool "Canadian French (CP863)"
config FATFS_CODEPAGE_864
   bool "Arabic (CP864)"
config FATFS_CODEPAGE_865
   bool "Nordic (CP865)"
config FATFS_CODEPAGE_866
   bool "Russian (CP866)"
config FATFS_CODEPAGE_869
   bool "Greek 2 (CP869)"
config FATFS_CODEPAGE_932
   bool "Japanese (DBCS) (CP932)"
config FATFS_CODEPAGE_936
   bool "Simplified Chinese (DBCS) (CP936)"
config FATFS_CODEPAGE_949
   bool "Korean (DBCS) (CP949)"
config FATFS_CODEPAGE_950
   bool "Traditional Chinese (DBCS) (CP950)"

endchoice

config FATFS_CODEPAGE
   int
   default 0 if FATFS_CODEPAGE_DYNAMIC
   default 437 if FATFS_CODEPAGE_437
   default 720 if FATFS_CODEPAGE_720
   default 737 if FATFS_CODEPAGE_737
   default 771 if FATFS_CODEPAGE_771
   default 775 if FATFS_CODEPAGE_775
   default 850 if FATFS_CODEPAGE_850
   default 852 if FATFS_CODEPAGE_852
   default 855 if FATFS_CODEPAGE_855
   default 857 if FATFS_CODEPAGE_857
   default 860 if FATFS_CODEPAGE_860
   default 861 if FATFS_CODEPAGE_861
   default 862 if FATFS_CODEPAGE_862
   default 863 if FATFS_CODEPAGE_863
   default 864 if FATFS_CODEPAGE_864
   default 865 if FATFS_CODEPAGE_865
   default 866 if FATFS_CODEPAGE_866
   default 869 if FATFS_CODEPAGE_869
   default 932 if FATFS_CODEPAGE_932
   default 936 if FATFS_CODEPAGE_936
   default 949 if FATFS_CODEPAGE_949
   default 950 if FATFS_CODEPAGE_950
   default 437

choice FATFS_LONG_FILENAMES
   prompt "Long filename support"
   default FATFS_LFN_NONE
   help
      Support long filenames in FAT. Long filename data increases
      memory usage. FATFS can be configured to store the buffer for
      long filename data in stack or heap.

config FATFS_LFN_NONE
   bool "No long filenames"
config FATFS_LFN_HEAP
   bool "Long filename buffer in heap"
config FATFS_LFN_STACK
   bool "Long filename buffer on stack"
endchoice

config FATFS_MAX_LFN
   int "Max long filename length"
   depends on !FATFS_LFN_NONE
   default 255
   range 12 255
   help
      Maximum long filename length. Can be reduced to save RAM.

config FATFS_FS_LOCK
   int "Number of simultaneously open files protected by lock function"
   default 0
   range 0 65535
   help
      This option sets the FATFS configuration value _FS_LOCK.
      The option _FS_LOCK switches file lock function to control duplicated file open
      and illegal operation to open objects.
       
      * 0: Disable file lock function. To avoid volume corruption, application
           should avoid illegal open, remove and rename to the open objects.
       
      * >0: Enable file lock function. The value defines how many files/sub-directories
           can be opened simultaneously under file lock control.
           
      Note that the file lock control is independent of re-entrancy.

config FATFS_TIMEOUT_MS
   int "Timeout for acquiring a file lock, ms"
   default 10000
   help
      This option sets FATFS configuration value _FS_TIMEOUT, scaled to milliseconds.
      Sets the number of milliseconds FATFS will wait to acquire a mutex when
      operating on an open file. For example, if one task is performing a lenghty
      operation, another task will wait for the first task to release the lock,
      and time out after amount of time set by this option.
      

config FATFS_PER_FILE_CACHE
   bool "Use separate cache for each file"
   default y
   help
      This option affects FATFS configuration value _FS_TINY.
      
      If this option is set, _FS_TINY is 0, and each open file has its own cache,
      size of the cache is equal to the _MAX_SS variable (512 or 4096 bytes).
      This option uses more RAM if more than 1 file is open, but needs less reads
      and writes to the storage for some operations.
      
      If this option is not set, _FS_TINY is 1, and single cache is used for
      all open files, size is also equal to _MAX_SS variable. This reduces the
      amount of heap used when multiple files are open, but increases the number
      of read and write operations which FATFS needs to make.
      

endmenu