isochronous transfer on 1394

NTDEV
1

Hello,

Is there anybody experienced with setting up an isoch transfer with the
1394-bus requests from the win2k DDK?

I use the pc with the 1394diag.sys (sample from the DDK) as the receiver and
a selfmade hardware (with mindready standalone board on the top) as the
transmitter. I always get a STATUS_INSUFFICIENT_RESOURCES error caused from
an REQUEST_ISOCH_LISTEN request to the 1394bus driver if I want to start the
“Isoch Listen”. I tried to allocate before in the “allocate resources” as
well big buffers as small buffers with the same result.

I’m not sure if I follow the ideas of the developper, because there is
nothing described. Is it necessary to attach buffers for an isoch listen? Or
can I work with the specified buffers from the “allocated resources”?

First of all I just want to display the incoming isoch packets on the
screen.

I’m greatful for every little hint
Regards
Daniel

Daniel Lüthi
Elektronik-Entwicklung - TEM 1413
Paul Scherrer Institut
Tel.dir. +41 / 56 / 310 31 13
Fax. +41 / 56 / 310 32 72
CH - 5232 Villigen PSI

2

Hi,

you have to attach buffers to receive iso packets. The buffers you specified on “alloc resources” define the worst case scenario (max size and max number of buffers you plan to attach). Note that there are various concepts of attaching and detaching iso buffers.

BTW, 1394diag is really an ugly sample. It is not suited for real world projects. As the name implies it is suited for diag purposes.
I can mail you a review article concerning the 1394diag sample. Plese contact me directly if you are interested.

You may consider using our VHPD1394 product. Everything you need is supported. Visit http://www.thesycon.de/vhpd1394/eng/vhpd.htm.

–
Udo Eberhardt
Thesycon GmbH, Germany
xxxxx@thesycon.de
www.thesycon.de

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com]On Behalf Of Daniel L?thi
Sent: Monday, August 05, 2002 10:57 AM
To: NT Developers Interest List
Subject: [ntdev] isochronous transfer on 1394

Hello,

Is there anybody experienced with setting up an isoch transfer with the
1394-bus requests from the win2k DDK?

I use the pc with the 1394diag.sys (sample from the DDK) as the
receiver and
a selfmade hardware (with mindready standalone board on the top) as the
transmitter. I always get a STATUS_INSUFFICIENT_RESOURCES error
caused from
an REQUEST_ISOCH_LISTEN request to the 1394bus driver if I want
to start the
“Isoch Listen”. I tried to allocate before in the “allocate resources” as
well big buffers as small buffers with the same result.

I’m not sure if I follow the ideas of the developper, because there is
nothing described. Is it necessary to attach buffers for an isoch
listen? Or
can I work with the specified buffers from the “allocated resources”?

First of all I just want to display the incoming isoch packets on the
screen.

I’m greatful for every little hint
Regards
Daniel

Daniel L?thi
Elektronik-Entwicklung - TEM 1413
Paul Scherrer Institut
Tel.dir. +41 / 56 / 310 31 13
Fax. +41 / 56 / 310 32 72
CH - 5232 Villigen PSI

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