RE: Re: Bluetooth on h5550 - do bnep connection work?

Does anyone know if this is an issue under WinCE?
thanks
maria cruz

-----Original Message-----
From: Phil Blundell [mailto:pb_at_nexus.co.uk]
Sent: Tuesday, September 14, 2004 2:50 PM
To: Cruz, Maria
Cc: h5400-port_at_handhelds.org
Subject: Re: [H5400-port] Re: Bluetooth on h5550 - do bnep connection
work?

No, this is an unsolved problem.

What seems to happen is that transmitted data gets lost between the host
CPU and the Nat Semi bluetooth module. This causes the HCI link to lose
synchronisation, and the bluetooth system shuts down.

I spent a while poking at this, and so did one of the guys from RTX (who
wrote the firmware in the module), but we did not manage to find out
what was causing it to go wrong. On the face of it, it looks like a
flow control problem, but transmit flow control is indeed enabled on the
pxa255 bluetooth uart, and in any case the module should be able to
consume data fast enough to stop its buffer ever overflowing. So it's
rather baffling.

p.

On Tue, 2004-09-14 at 14:03 -0400, Cruz, Maria wrote:
> I was wrong i get a timeout also...
>
> did anyone ever solve this?
>
> my situation:
> I have a bnep connection setup between ipaq 5550 (Opie 1.0.3, kernel 2.4.19-rmk6-pxa1-hh36.11) and another handheld (kernel=2.4.26). i setup bnep:
> handheld:
> pand --listen --role NAP --master
>
> ipaq:
> pand --connect <mac add> --persist
>
>
> All works well, until the bnep connection seems to stop after about 30 - 60 secs.
>
> I get from logread:
>
> Jan 14 19:57:28 krd35000jt syslog.err klogd: hci_cmd_task: hci0 command tx timeout
> Jan 14 19:57:29 krd35000jt syslog.err klogd: hci_acl_tx_to: hci0 ACL tx timeout
> Jan 14 19:57:29 krd35000jt syslog.err klogd: hci_acl_tx_to: hci0 killing stalled ACL connection <mac>
> Jan 14 19:57:30 krd35000jt syslog.err klogd: hci_acl_tx_to: hci0 ACL tx timeout
> Jan 14 19:57:30 krd35000jt syslog.err klogd: hci_acl_tx_to: hci0 killing stalled ACL connection <mac>
> Jan 14 19:57:30 krd35000jt syslog.err klogd: hci_cmd_task: hci0 command tx timeout
>
>
> On ipaq doing
> /etc/init.d/bluetooth restart
> /etc/init.d/hcid start
>
> generally clears up the problem, i restart pand and all is ok for another 30-60 secs.
>
> thanks
>
> maria cruz
>
>
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Received on Tue Sep 14 2004 - 16:59:34 EDT