AVR-Chat

In my search for a chip/daughterboard/etc. that supports PSTN (PPP?) internet
access (dialup) I have come across the following:

http://www.iready.org/projects/imm/ Looks interesting but appears to be obsolete
as I can't find anywhere that sells it.  I cam across a ref to it here
http://www.sensorsmag.com/articles/0402/26/main.shtml

http://www.ee.nec.de/_pdf/U16245EE3V0DS00.PDF Looks good but I can't find
anyplace that carries it.

http://www.connectone.com (click 'products') full compliment of protocols but
expensive (eval board >$300)

http://www.cermetek.com/05/607-0017.pdf {looks good, evaluation board
http://www.cermetek.com/05/652-0250.pdf is available)  The CH2165 supports
unlimited email length.  These units have integrated modems which, in my case,
isn't desirable since I have old modems laying around and the thing that's most
likely to be done in by a lightning strike (even with lightning/surge
protection) is the modem so I'd like to keep that separate.  I think the eval
set runs $199 which is steep.

ATWEBEVK-01 Atmel eval kit for embedded TCP/IP but expensive at $264.67 from
Digikey

I found Eithernut on Sourceforge.  It's an AVR targeted implementation of the
TCP/IP stack including Eithernet and PPP net interfaces but it looks quite
involved for me to jump into at this point.

Anyone have any experience with any of the above?  Others?

Desired features:
1) support for dialup Internet access.  High speed (i.e.: 56k) desirable but not
required.
2) support for an external modem
3) Self contained TCP/IP stack and high level protocols for, at a minimum, SMTP
and POP3.  Other protocols such as UDP, HTTP would be nice.  As an alternative,
a software library callable from C that resides on an ATMega.

Cheers,

Chuck Hackett
"Good judgment comes from experience, experience comes from bad judgment"
7.5" gauge Union Pacific Northern (4-8-4) 844
http://www.whitetrout.net/Chuck

----- Original Message -----

From: "Chuck Hackett" <egroupscdh@WhiteTrout.net>
To: <AVR-Chat@yahoogroups.com>
Sent: Sunday, October 24, 2004 7:41 AM
Subject: [AVR-Chat] PSTN/PPP support


>
> In my search for a chip/daughterboard/etc. that supports PSTN (PPP?)
internet
> access (dialup) I have come across the following:
>

<snip>

> Desired features:
> 1) support for dialup Internet access.  High speed (i.e.: 56k) desirable
but not
> required.
> 2) support for an external modem
> 3) Self contained TCP/IP stack and high level protocols for, at a minimum,
SMTP
> and POP3.  Other protocols such as UDP, HTTP would be nice.  As an
alternative,
> a software library callable from C that resides on an ATMega.
>
> Cheers,
>
> Chuck Hackett
> "Good judgment comes from experience, experience comes from bad judgment"
> 7.5" gauge Union Pacific Northern (4-8-4) 844
> http://www.whitetrout.net/Chuck



    Hello, I can speak only for Ethernut which is a great design, and open
source,
software and hardware. Ethernut boards are available at Egnite but you can
build a clone without ethernet parts, reducing component parts to only a
mega128, 32K SRAM, HC573 and a RS232 driver. The implemented TCP/IP
stack has some high level protocols implemented however no SMTP and POP3
but these are quite easy to write. PPP works very well on fixed line modems,
GSM GPRS and CDMA.
    A big bonus is NutOS, a threaded cooperative OS.

Regards,
Cosmin Buhu
http://www.easyvitools.com
Easy Control - Fast Windows developement for serial&TCP/IP communications
EzCom2Web - Web enable your serial device

> From: Cosmin Buhu
> ....
>     Hello, I can speak only for Ethernut which is a great 
> design, and open source, software and hardware. Ethernut 
> boards are available at Egnite but you can build a clone 
> without ethernet parts, reducing component parts to only a 
> mega128, 32K SRAM, HC573 and a RS232 driver. 

Ok, you've convinced me that I should seriously consider Ethernut.  Since I've
got my hands full with SW development without adding board development.  Does
someone have a board made up with the components to support PPP?  Or, can I add
a second RS-232 port (via the expansion connector?) to one of the Ethernut
boards so that I can support LAN and PPP (PPP near-term, later switching to
10-BaseT when I have it available)?

I note that one of the boards supports a second serial port but it is
half-duplex only.

In scanning the Ethernut site (http://www.ethernut.de) so far I only find in the
SW manual mention of PPP support but nothing on how to configure/accomplish
this.  Can someone point me to something?

> The implemented 
> TCP/IP stack has some high level protocols implemented 
> however no SMTP and POP3 but these are quite easy to write. 
> PPP works very well on fixed line modems, GSM GPRS and CDMA.
>     A big bonus is NutOS, a threaded cooperative OS.

I think I can manage the SMTP and POP3 stuff ok ...

Thanks for the help ...

Cheers,

Chuck Hackett
"Good judgment comes from experience, experience comes from bad judgment"
7.5" gauge Union Pacific Northern (4-8-4) 844
http://www.whitetrout.net/Chuck

> From: Chuck Hackett
> ....
> Ok, you've convinced me that I should seriously consider 
> Ethernut.  Since I've got my hands full with SW development 
> without adding board development.  Does someone have a board 
> made up with the components to support PPP?  Or, can I add a 
> second RS-232 port (via the expansion connector?) to one of 
> the Ethernut boards so that I can support LAN and PPP (PPP 
> near-term, later switching to 10-BaseT when I have it available)?
> 
> I note that one of the boards supports a second serial port 
> but it is half-duplex only.
> 
> In scanning the Ethernut site (http://www.ethernut.de) so far 
> I only find in the SW manual mention of PPP support but 
> nothing on how to configure/accomplish this.  Can someone 
> point me to something?

Bad form to reply to one's own message but Harald Kipp from Egnite sent a
response to an email I sent:

> From: Harald Kipp
> 
> Charles,
> 
> I'm sorry, but there is currently no prepared adapter available.
> 
> If you're using Ethernut 2, the schematic at the end of 
> http://www.ethernut.de/en/nuttecnotes/ntn-1_ppp.html
> may help to create such an adapter yourself.
> 
> However, you may need the CTS output for hangup, depending on 
> the modem.

The link above was very helpful.  I thought it might be of help to others ...

Cheers,

Chuck Hackett
"Good judgment comes from experience, experience comes from bad judgment"
7.5" gauge Union Pacific Northern (4-8-4) 844
http://www.whitetrout.net/Chuck

----- Original Message -----

From: "Chuck Hackett" <egroupscdh@WhiteTrout.net>
To: <AVR-Chat@yahoogroups.com>
Sent: Sunday, October 24, 2004 8:45 PM
Subject: RE: [AVR-Chat] PSTN/PPP support
> Ok, you've convinced me that I should seriously consider Ethernut.  Since
I've
> got my hands full with SW development without adding board development.
Does
> someone have a board made up with the components to support PPP?  Or, can
I add
> a second RS-232 port (via the expansion connector?) to one of the Ethernut
> boards so that I can support LAN and PPP (PPP near-term, later switching
to
> 10-BaseT when I have it available)?
> I note that one of the boards supports a second serial port but it is
> half-duplex only.
> In scanning the Ethernut site (http://www.ethernut.de) so far I only find
in the
> SW manual mention of PPP support but nothing on how to
configure/accomplish
> this.  Can someone point me to something?
> I think I can manage the SMTP and POP3 stuff ok ...
> Thanks for the help ...
> Cheers,
> Chuck Hackett
> "Good judgment comes from experience, experience comes from bad judgment"
> 7.5" gauge Union Pacific Northern (4-8-4) 844
> http://www.whitetrout.net/Chuck


    I am preparing this board:
http://www.byteworks.ro/ppp-nut.jpg
    targeted exactly to modem comms. Is compatible with ethernut in software
and
connectors placement, but has 128KB SRAM available (64KB directly usable).
    The second serial port can be used for PPP too, they are identical.

Regards,
Cosmin Buhu
http://www.easyvitools.com
Easy Control - Fast Windows development for serial&TCP/IP communications
EzCom2Web - Web enable your serial device

--- In AVR-Chat@yahoogroups.com, "Chuck Hackett" <egroupscdh@W...>
wrote:
> In my search for a chip/daughterboard/etc. that supports PSTN (PPP?)
internet
> access (dialup) I have come across the following:

I've seen this www.nchip.com, it is based on AVR but I don't know how
it works.

-lp