Re: [Contiki-developers] Coffee File Syystem question

[Marek B. <mar...@gm...>]

Cool! Thanks Nicolas for your prompt answer!

Marek

On 29 August 2010 13:18, Nicolas Tsiftes <nv...@si...> wrote:

>  Marek Bykowski skrev 2010-08-28 22:05:
> > Hey All,
> >
> > I use Tmote Sky and CFS to take record of packets arriving at the
> > receiver.
> > Tmote Sky is fitted with 1mb external flash.
> > After occupying round 1/3 of that size I can't write any more data
> > into a file and it is impeccably regular.
> > Did anybody come across it before or maybe knows if it may have
> > anything to do with the default CFS settings?
> >
> > Thanks a million,
> > Marek, WISAR
>
> Hello,
>
> The cfs_coffee_reserve function should be used before creating the file
> if you know the file size, or at least know that the file will be big.
>
> If you don't use this function, the file space will grow dynamically and
> have a lower space limit in relation to the total space available.
>
>
> /**
>  * \brief Reserve space for a file.
>  * \param name The filename.
>  * \param size The size of the file.
>  * \return 0 on success, -1 on failure.
>  *
>  * Coffee uses sequential page structures for files. The sequential
>  * structure can be reserved with a certain size. If a file has not
>  * been reserved when it is opened for the first time, it will be
>  * allocated with a default size.
>  */
> int cfs_coffee_reserve(const char *name, cfs_offset_t size);
>
> Nicolas
>
>
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