THIN is a highly optimized, reduced footprint version of our highly successful FAT system. This DOS compatible file system is designed for configurations with limited resources. It is especially effective for use in low-power devices and environments with small amounts of RAM and ROM.
THIN is scalable. By selecting only the functionality required for the application, the system becomes highly optimized for both speed and size.
* FAT12, FAT16 and FAT32
* Long filenames
* Highly scalable
* Small footprint
* Low memory resource usage
* Media error handling
* Fully PC-compatible
* ANSI-compliant C source
THIN is a DOS-compatible flash file system that is designed to be extremely scalable. It allows the developer with limited resources to build precisely the system that is needed, and no more. The system is full-featured; new options can be enabled as requirements change.
It is not possible to give definitive figures for footprints because processors and development tools have major differences.
Estimated Code Footprint
Depending on the options selected at build time, the code footprint of the file system can be less than 4k for a minimum DOS-compatible system for accessing files on a disk, up to around 20K for a complete file system with all options enabled including disk formatting.
THIN works completely independently of any host system. Memory is statically allocated; there is no need to provide a heap. The typical total data footprint is <1K plus 0.5K for each open file.
Typically the stack requirement for any call to the file system is less than 0.5K.
The system contains a large number of build options. These are detailed in the developer’s guide. Some of the options are:
* ... and many, many more
Each and every API call can be included or excluded from the build. This automatically removes unnecessary sub-routines.
THIN is designed to be very portable. It is tested on several commercial RTOSes and also in a stand-alone system with no RTOS. We are not aware of any RTOS with which it cannot be used.
All the code is supplied in ANSI-compliant C. It has been built on four different development environments and run through a syntax checker to ensure the highest level of compatibility.
Sample application code is supplied for easy exercise of the system, as well as sample drivers for different media types with clear reference to their hardware dependencies.