Re: [ECOS] Flash Filesystem

[Nacho de los Ríos <irios at proin dot es>]

Hi Ohlund,

Visit Intel's web at developer.intel.com and go to the Flash pages.

There are a few application notes about flash filing systems, and even two
pretty sophisticated ones.

VSB/VFM (Virtual Small Block / VSB File Manager) uses a hard-disk like block
approach (in fact, VSB alone can be usedto fool an existing operating system
into viewing a Flash  chip as independent sectors).

There is also FDI (Flash Data Integrator), more oriented to closed embedded
systems (really to GSM Phones), in which the chip is used simultaneously to
execute code in place and as a data store. The data structure is less hard-disk
like.

You can even get from Intel the source code for these filing systems, though
integrating them in your project might not be exactly easy as pie, and though I
do not know what restrictions, if any, does Intel place on their usage (I
remember the license used to say usage was free for use on Intel parts).

Good luck,

Nacho de los Ríos

El lun, 19 jun 2000, KASHIWAYA Haruki escribió:
> Hi Ohlund,
> 
> jens.ohlund@secrc.abb.se wrote:
> > I'm to make a small filesystem on flash on a AEB-1.
> > Since I've never ever written a filesystem I wonder lots of 
> > things. I know what a filesystem is and how it works ina limited 
> > meaning.
> > 
> > Anybody got any documenation about how to do a filesystem on a 
> > flash, I'd LOVE examples.
> > What to think about and so on. Everything.
> 
> Here is a book about how to write embedded system:
> http://www.oreilly.com/catalog/embsys/
> 
> This book is including a sample FLASH driver's source
> (donot expect it too much, it's very simple. but it may useful to 
> first step.)
> 
> Those sample sources uploaded as follows:
> ftp://ftp.oreilly.com/pub/examples/nutshell/embedded_c/
> 
> 
> I hope you will suceed. :-)
> 
> 
> Regards,
> --
> KASHIWAYA Haruki
> Red Hat K.K.