We've been using the SAM7 chips for several years with very few
problems, but Atmel seems to have introduced problems with the Rev B
devices. At least that seems to be where the troubles started.

We've already hit the "must reset SPI port twice" unpublished
errata. In talking to Atmel support, they were aware of the problem,
but hadn't published as an errata. Nice product support.

Now we're seeing a problem that I think has to do with the PLL.
We've recently had a noticeable percentage of devices that weren't
working or were working intermittently. I've seen a couple of
symptoms: Random data aborts during early initialization and finding
that the PIT timer wasn't counting and its registers indicating it
hadn't been programmed, even though I'm sure it was.

Putting a short delay after the wait for the PLL lock bit, but
before making the PLLCLK/2 the master clock seems to fix the problem,
indicating that maybe the PLL hadn't really settled down when the lock
bit indicates it has.

Anyone else seeing this problem?

Cliff
------------------------------------



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Hi gurus,

I've been writing a SAM7 driver for an SDIO WiFi card. All going well, but
because I have to implement the 802.11 MAC state machines myself, there's an
information element I can't find anything on. I don't need it per se - I
think - but I'd like to know whether it is important/relevant :

In response to an association request or a probe request, my router returns
the following information element at the end of the response frame :

DD 06 00 10 18 02 02 F0

The Information ID is 0xDD, length 06 with field 00 10 18 02 02 F0

I can't find anything on this, nor in the 802.11 standard, nor on Google.
The only hits I get are to do with various patents.
This relates to 802.11b - 802.11i

This information element is the last in the Probe Response or Association
Response, and follows the "Basic supported Rates" Information element :

01 04 82 84 8B 96

I've tried with 2 different access points, both return the same
"vendor-specific" (According to 802.11 -2007 standard) 0xDD Information ID.

Does anyone have a list of Information Ids where DD appears, or know what it
means ???

Best regards,
Kris

------------------------------------



(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )

--- In A...@yahoogroups.com, "Microbit_P43000"
wrote:
> I can't find anything on this, nor in the 802.11 standard, nor on
Google.

Kris, I can't help you with the problem, but I can recommend you to
check http://www.wireshark.org/

They have pretty advanced sniffer which can analyze hundreds of
protocols and if you are lucky you will see what is the meaning of
your binary data...
btw it's interesting project, I may have to do something like this
next year, so good luck and keep us posted ;-)

miro
------------------------------------



(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )

Hello Kris,

> DD 06 00 10 18 02 02 F0

i also can't help, but have you checked if the 6 bytes are not equal to
the MAC address ?

Another question: Which SDIO Wifi card are you using ? Is there
documentation available for private purposes, without signing an NDA ?
Is there a possibility to share your sources ?

Regards,

Martin

------------------------------------



(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )

Hi Miro,

I thought wireshark was the same as Ethereal, but I presume it's a
commercial extension?
I tried with Ethereal, but my (older) digimate USB 802.11b adapters don't
appear to support promiscuous mode :-(
(IOW I can' t capture raw 802.11 packets, but I can capture at IP level)

In the meantime I figured out what the information is, I'll comment in the
other reply.

Best Regards,
Kris
-----Original Message-----
From: A...@yahoogroups.com [mailto:A...@yahoogroups.com] On Behalf Of
miro_atc
Sent: Tuesday, 16 September 2008 8:48 PM
To: A...@yahoogroups.com
Subject: [AT91SAM] Re: any 802.11 gurus ? unknown Information Element

--- In A...@yahoogroups.com, "Microbit_P43000"
wrote:
> I can't find anything on this, nor in the 802.11 standard, nor on
Google.

Kris, I can't help you with the problem, but I can recommend you to
check http://www.wireshark.org/

They have pretty advanced sniffer which can analyze hundreds of
protocols and if you are lucky you will see what is the meaning of
your binary data...
btw it's interesting project, I may have to do something like this
next year, so good luck and keep us posted ;-)

miro

------------------------------------



(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )

Hi Martin,

In the meantime I figured out that DD = 221 = WPA_INFO_ELEM.

It contains the SUITE_SELECTOR & version.
SUITE_SELECTOR structure holds oui (3 bytes) & type (1 byte)

> Another question: Which SDIO Wifi card are you using ?

I'm using SDW-820 Spectec

> Is there documentation available for private purposes, without signing an
NDA ?

I signed an NDA with Spectec :-(

> Is there a possibility to share your sources ?

Not at this stage, I will have to see where I go with this, sorry..
I got some WINCE code which I've had to reverse engineer on for weeks to
figure out how to talk to the IPN2128 chipset - it's extremely complex.

Best Regards,
Kris

-----Original Message-----
From: A...@yahoogroups.com [mailto:A...@yahoogroups.com] On Behalf Of
capiman26061973
Sent: Tuesday, 16 September 2008 10:05 PM
To: A...@yahoogroups.com
Subject: [AT91SAM] Re: any 802.11 gurus ? unknown Information Element

Hello Kris,

> DD 06 00 10 18 02 02 F0

i also can't help, but have you checked if the 6 bytes are not equal to
the MAC address ?

Another question: Which SDIO Wifi card are you using ? Is there
documentation available for private purposes, without signing an NDA ?
Is there a possibility to share your sources ?

Regards,

Martin

------------------------------------



(You need to be a member of AT91SAM -- send a blank email to AT91SAM-subscribe@yahoogroups.com )