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Understand FileX
FileX is a high-performance, file allocation table (FAT)-compatible file system that's fully integrated with ThreadX and available for all supported processors. Like ThreadX, FileX is designed to have a small footprint and high performance, making it ideal for today's deeply embedded applications that require file management operations. FileX supports most physical media, including RAM, USBX, SD CARD, and NAND/NOR flash memories via LevelX.

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.