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µTasker general / Re: Filesystem on NE64 using dataflash

« on: September 25, 2007, 09:00:36 AM »

I suggest also looking at some other projects:
- Fabio has ported a file system for use on SD cards. I wonder how this would fit? See: http://www.utasker.com/forum/index.php?topic=28.0
- http://elm-chan.org/fsw/ff/00index_e.html is a project with FatFs / Tiny-FatFs which could possibly be used as a base.

Presently I am contemplating the way to go here. It is clear that with large amounts of memory a more powerful option will be useful. Should there however be compatibility issues if the memory is removable? Should it be possible to write an SD card from a PC and read it in the embedded product (or reverse). Or is this not an issue for the projects done with the uTasker? Will there be copyright issues if FAT or FAT like operation is performed???
Should the uTasker have its own solution or should it integrate existing ones?

Having support for removable memory that one can share with another machine would be great for uTasker.  The only reason to consider FAT would be to address SD memory / machine compatibility.

I've ported both EFSL and FatFs/Tiny-FatFs to LPC2xxx with IAR 4x.  I prefer FatFs/Tiny-FatFs.

FAT is still somewhat in the air as to licensing.  If you contact Microsoft and talk to them they mention $10k and $250k for FAT/VFAT licensing.  Also the SD card organization "requires" membership to use their SSP specification, somewhere around $1250 per year.  Both fall under a gray area.  There are all sorts of new devices that fall under this gray area.


Cheers,
Joel