Filesystem driver is needed if ur storing and reading data from a large
memory device like sd card or another memmory chip
YOurs SaRIn....


On Fri, Jan 29, 2010 at 8:01 PM, Xiaofan Chen <xiaofanc@gmail.com> wrote:

> On Sat, Jan 30, 2010 at 2:27 AM, Fede Maidana <fedexlacria@hotmail.com>
> wrote:
> >
> > HelloI am trying to use pic 18f4550 as a mass storage usb device with the
> demo
> > firmware supplied by microchip. I need to send (only send) files from the
> computer
> > to the pic via usb and then use those files within the pic.
> > Is it strictly necessary to use the mdd file system to read the stored
> files? or is
> > there another way i can read them?
> > I'm asking this because includind both the usb firmware and mdd libraries
> makes
> > the files to large. Thanks
> >
>
> How big are the data? You can always use treat them as data stream and use
> HID/CDC etc. In that case, the firmware size will be much smaller.
>
> Take the example of PICKit 2, you can send quite a lot of data to it with
> HID,
> no file system involved.
>
>
> --
> Xiaofan http://mcuee.blogspot.com
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