Re: Neuorphysiology app (Re: Maximum scan rate & external reference for AO)

Hi John and Marco,

I am also a neurophysiologist and I used rtai/comedi to to do a dynamic 
clamp system (very simple code as i am not a programer). Could you guys 
share the utilities you have? Also, there is a routine for matlab (using 
comedi) that you can sync AI/AO, it's not mine but I'm sure I have it 
somewhere, if you're interested.

Cheers

Richardson

John F. Wesseling wrote:
> Hi Marco,
>
> Slightly off point, but you might be interested.
>
> I am a neurophysiologist and have written a simple but generalizable 
> app to control DAQ boards with comedi - I use NI boards, both E and M 
> series.  Since I couldn't figure out how to synchronize DIO channels 
> with analog I/O, I decided to run RTAI (www.rtai.org) in order to 
> synchronize the various output subdevices with analog in; this seems 
> like a hack, but has the advantage of letting us use cheap boards - 
> seems to synchronize things at 30 kHz for several minutes without 
> problem.  The human interface is in Qt and Qwt.
>
> The code isn't pretty, and I add features on a need to use basis 
> only.  I would have no time to provide support, but I would be happy 
> to share the code.
>
> Best,
> John
>
>
>
>> Date: Wed, 13 Jun 2007 12:23:54 +0200
>> From:
>> To: comedi_at_comedi.org
>> Subject: Maximum scan rate & external reference for AO
>>
>> Hi,
>>
>> I am adapting a software for neuronal recordings to comedi in order to
>> obtain universal support for any kind of DAQ board.
>> There are two open questions to me:
>>
>> 1. Is there any possibility within comedilib to get the maximum
>> scan/sampling rate supported by a board for asynchronous analog
>> acquisition ?
>>
>> 2. For my NI-E card, external reference for analog output is supported
>> by comedi via the actually not existing range indices 3 & 4.
>> Is this the general strategy for all comedi-drivers to support external
>> reference?
>> Can I somehow find out generically which output ranges are reserved by
>> the current driver for external reference?
>>
>> Thanks in advance for your help!
>>
>> Greets,
>> Marco
>
>
>
> John F. Wesseling, Ph.D.
> Departamento de Neurociencias
> Centro de Investigación Médica Aplicada (CIMA)
> Pio XII, 55
> 31008 Pamplona
> Spain
> Phone +34 948 19 47 00 ext. 2005
> (if you don't speak Spanish, when the recording comes on,
> just enter the extension and wait)
> Fax     +34 948 19 47 15
>
>
>
>
>
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Received on 2007-06-13Z23:42:26