[wdmaudiodev] Re: Read Write PCI Configuration Space
- From: "Shyam Narayanan" <shyam@xxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Thu, 4 Mar 2004 14:38:07 -0600
http://h18000.www1.hp.com/support/files/alphant/drivers/ ->Compaq's
utility.
http://www.h-oda.com/ WPCREDIT by H.Oda.
Both are good.
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Nitin Porwal,
Noida
Sent: Thursday, March 04, 2004 1:27 PM
To: 'wdmaudiodev@xxxxxxxxxxxxx '
Subject: [wdmaudiodev] Read Write PCI Configuration Space
Hi,
Does anybody have some stuff about how to read/write the PCI
Configuration
space. my objective is to set some bits in the Command and Status
register
of PCI Config space. If anybody can provide me sample code then it would
be
of great help
Thanks
Nitin
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
To: wdmaudiodev@xxxxxxxxxxxxx
Sent: 3/4/04 1:37 PM
Subject: [wdmaudiodev] Re: Modified kernel streaming example
Well, actually not. I had this problem with one specific device only
and only for large buffers (2048 samples and more).
I have not followed this problem too much even though the technical
support of the device
gave me a contact address for the driver I used. I did not contact the
person however
because it seemed that with the latest version of the driver which is
available in the meantime
the problem disappeared (no intensive testing!).
I modified my own software also to achieve better performance in another
context.
Also this may be the reason why it seems to work now:
I am using the KS-example for capture and playback (duplex), not only
for playback.
In the latest version of my software I have one thread for incoming and
one for outgoing buffers.
Before I had one thread for both, waiting for all events in one
Wait-function.
Mmmh, the problem I described was only for playback... Maybe it is
helpful anyway.
But there was no change in the context of KS-Interfacing actually...
Best Regards,
Hauke
Jerry Evans wrote:
>I have run into exactly the same problem with the AC97 drivers in WinXP
SP1.
>Did you find a solution ?
>
>Does anyone know what to do when this occurs ?
>
>TIA
>
>Jerry
>
>----- Original Message -----
>From: "User for realtime audio" <audiodev@xxxxxxxxxxxxxxxxxx>
>To: <wdmaudiodev@xxxxxxxxxxxxx>
>Sent: Wednesday, December 17, 2003 11:20 AM
>Subject: [wdmaudiodev] Re: Modified kernel streaming example
>
>
>>Well, still suffering the same problem I have found out something new:
>>
>>It seems that my problem is correlated to the order of the buffers
being
>>processed
>>by the driver:
>>If using 8 Buffers to flush the order to write the buffers should be
>>0..7 according to the
>>first write-accesses to the driver. And that should be the order of
the
>>signalled events.
>>
>>Whenever using buffers with critical sizes the order in which the
>>buffer-writes have been
>>completed are kind of arbitrary, e.g. 0 5 3 7 0 2 5 6.
>>
>>In case of those buffersizes that function propperly, the order is as
>>expected 0..7.
>>Thus it seems that the driver somehow writes the buffers to the
hardware
>>in a wrong order, thus my question:
>>
>
>
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