Alexander Baranov  wrote in message
news:c1161b98.0301281019.70a623c3@posting.google.com...
> "Jeremy Bentham"  wrote in message
news:<3e364e90$0$49728$7b0f0fd3@reader.news.newnet.co.uk>...
> > Alexander Baranov  wrote in message
> > news:c1161b98.0301271200.7f06a39d@posting.google.com...
> > > "Alex Gibson"  wrote in message
> >  news:...
> > > > "Chris Hills"  wrote in message
> > > > news:ReGWUPA5pbI+EAjV@phaedsys.demon.co.uk...
> > > > > In article , James Dabbs
> > > > >  writes
> > > > > >We're considering embedding 802.11 into a low-cost device, using
an
> >  H8S,
> > > > > >AVR, or similar class of micro, maybe running uC/OS.  It seems
that
> > > > > >"module-level" 802.11 solutions are available for this, from
SyChip
> >  and
> > > > > >others.  Who has experience with this?  What module, micro, OS,
and
> >  stack
> > > > > >did you use?  What kind of memory/cpu requirements are there?
Did
> >  you
> >  have
> > > > > >a good time?  What are the risks and gotcha's?  etc.
> > > > >
> > > > > Try the Dallas 80C400?
> > > > >
> > > > > an 80512 with a built in  ethernet driver and I believe TCP/IP in
> > > > > hardware....
> > > > >
> > > >
> > > > DS80C400
> > > >
> > > >
> > > >  IEEE 802.3 Ethernet Interface with TCP/IP in ROM
> > > >
> > > >  DS80C400 Networked Microcontroller Includes an
> > > > Ethernet MAC Interface with a Full TCP/IP v4/6
> > > > Network Stack for Simple Connections to an Ethernet Network
> > > > http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3609
> > > >
> > > >  App Note 703: Embedded Networking with IPv6
> > > > http://www.maxim-ic.com/appnotes.cfm/appnote_number/1095
> > > > TCP/IP on the DS80C400
> > > > The on-chip DS80C400 silicon software (ROM) contains the
> > > >
> > > > latest revision of the field-proven Dallas TCP/IP stack.
> > > >
> > > >
> > > >  App Note 704: Asynchronous Serial-to-Ethernet Device Servers
> > > > http://www.maxim-ic.com/appnotes.cfm/appnote_number/1095
> > > >
> > > >
> > > > Alex
> > > I think, that the main problem is not in TCP/IP stack and  Ethernet
> > > software, but in portable and affordable RF and baseband chipset,
> > > supporting 802.11.
> > > Aleks.
> >
> > Agreed. If you're selling less than 100,000 units a year the
manufacturing &
> > testing overheads are high, and the chipmakers won't support you, so you
> > have to use a pre-packaged RF solution. We offer a PCMCIA and CF
solution
> > based on the PRISM  chipset, which does seem to be widely available at
low
> > cost, and not too difficult to program if you can get hold of the
Intersil
> > programmer's manual.
> >
> > Jeremy Bentham
> > Iosoft Ltd.
> > www.iosoft.co.uk
>
> Have I understood correctly, that you use PRISM PCMCIA card in
> connection with your PIC web server? Could'nt you advice, whether I
> can do the same e.g. with Ethernut board and how much it would
> increase the device cost?

I don't have any experience of the Ethernut board; a quick glance at the
manual suggests it might be possible to add WLAN functionality, though there
doesn't seem to be any wait-state capability on the expansion header, which
would preclude the connection of a PCMCIA/CF card directly to the address &
data bus.

Jeremy Bentham
Iosoft Ltd.