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overview-filex.adoc

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Overview of FileX

FileX embedded file system is Eclipse ThreadX’s advanced, industrial grade solution for Eclipse Foundation FAT file formats, designed specifically for deeply embedded, real-time, and IoT applications. FileX supports all of Eclipse Foundation’s file formats, including FAT12, FAT16, and FAT32. FileX also offers optional fault tolerance and FLASH wear leveling via an add-on product called LevelX. All of this combined with a small footprint, fast execution, and superior ease-of-use, make FileX the ideal choice for the most demanding embedded IoT applications.

API protocols

Media Services

  • FAT 12/16/32 support

  • Minimal 6KB FLASH, 2.5KB RAM

  • Complete media access services

  • Unlimited number of media instance

  • Simple read/write logical sector driver interface

  • Multiple partition support

  • Logical sector cache

  • FAT entry cache

  • Optional fault tolerance support

  • Deferred Secondary FAT update

  • System-level Trace via TraceX

  • Intuitive media access APIs, including:

    • fx_media_open

    • fx_media_close

    • fx_media_format

    • fx_media_space_available

Directory Services

  • Up to 256 byte paths

  • Long and 8.3 directory names supported

  • Directory create & delete

  • Directory navigation and traversal

  • Directory attributes management

  • System-level Trace via TraceX

  • Intuitive directory access APIs, including:

    • fx_directory_create

    • fx_directory_delete

    • fx_directory_attributes_set

    • fx_directory_attributes_read

    • fx_directory_first_entry_find

    • fx_directory_next_entry_find

File Services

  • Minimal 3.3KB FLASH

  • Unlimited open files

  • Read-only files can be opened multiple times

  • Long and 8.3 directory names supported

  • Contiguous file support

  • Fast seek logic

  • Pre-allocation of clusters

  • File create, delete, and rename

  • File read, write, and see

  • File attributes management

  • System-level Trace via TraceX

  • Intuitive file access APIs, including:

    • fx_file_create

    • fx_file_delete

    • fx_file_attributes_set

    • fx_file_attributes_read

    • fx_file_read

    • fx_file_seek

    • fx_file_write

Advanced technology

FileX is advanced technology, including the following.

  • FAT 12/16/32 support

  • Multiple partition support

  • Automatic scaling

  • Endian neutral

  • Long file name and 8.3 support

  • Optional fault tolerance support

  • Logical sector cache

  • FAT entry cache

  • Pre-allocation of clusters

  • Contiguous file support

  • Optional performance metrics

  • TraceX system analysis support

NOR/NAND Wear Leveling (LevelX)

LevelX is Eclipse Foundation’s NOR/NAND FLASH wear leveling product. LevelX can be used in conjunction with FileX or as a stand-alone, direct read/write FLASH sector library for the application.