ERTFS Pro 4.4 - Features

File System Software For Embedded Applications

• Run Time Configuration
  With the exception of device driver local data, all configuration constants, buffer declarations, data declarations and global variables have been removed. They are now provided by the user at run time.
• Easy Implementation
  Implementing ERTFS in polled mode is very simple. A new port of ERTFS-PRO using memory based devices only (ram disk, rom disk, and flash simulated in ram. Should run immediately on any target system.
  Implementing thread safe multi-tasking support is simple. A version may be created by editing only a few empty template subroutines in the porting file. Adding support for a new real time operating system is easy and is accomplished quickly.
• Failsafe Operation
  ERTFS-PRO will be released with a failsafe mode that will maintain full file system integrity in the event of instant power outages.
• String Tables
  All strings used by the file system are segregated into a string table in a single source file. These strings may be modified to match the native character set and language (Japanese, Korean, Hebrew, Chinese, French etc). Japanese (JIS) character sets are now supported.
• Unicode Support
  Character sets are now supported. As it is with VFAT and FAT32, we will probably offer alternate character set support as an add-on to a basic package.
• VFAT (long file name)
  VFAT Source code is now segregated to one file. We will probably offer this support as an add-on to a basic package. Developing a non VFAT long file name package is under consideration.
• FAT32 (long file name)
  Source code is now segregated to one file. We will probably offer this support as an add-on to a basic package.
• Interactive Command Shell
  If two simple console I/O routines are provided, an interactive command shell may be provided on the target system.
• Windows Prototyping
  A Windows prototyping environment will now be included and may be used as a separate product or used as a sales tool.
• Windows Based ERTFS Command Shell
  A pre-built Windows based ERTFS command shell is included. It can copy whole Windows/NT subdirectories to ERTFS file system images. These file system images can be manipulated with command shell file maintenance commands. This same image may be accessed by user code in the windows prototyping environment. They can also be emitted as ROM disk images for inclusion in embedded applications.
• Regression Test Tool
  The regression test tool may be called from either the API or from the command shell.
• Device Drivers
  Device drivers are selected at run-time and passed to ERTFS at initialization time. Conditional compilation is required only at the device driver layer and that is very limited in scope.
  A simple device driver configuration file is provided to assist users wishing to use device drivers provided with ERTFS. All files compile generically with the exception of two porting layer files.
• Simplified Device Driver Porting Layer
  The device driver porting layer is simplified. Core device driver code is very portable, the few very device specific calls per device driver are required. These routines are segregated in one file.

Included or Available Device Drivers
IDE/ATA with IDE Ultra DMA mode, Compact Flash, Ram Disk, Rom Disk, Linear Flash, Floppy, SmartMedia (beta), MultiMedia (beta), (Sony Memory Stick - to be announced), (USB - to be announced)

Advanced Features of ERTFS Pro File System

Table driven device interface supports user supplied device drivers.

User devices may be removable and may have partitions.

ERTFS handles all devices the same way.

DOS File System

CD File System

ERTFS Pro 4.4 Features of ERTFS Supported Devices ERTFS API

CD-ROM File System Features of CDFS CDFS API Test Shell User Command