- From: John F. Wesseling <jwesseling_at_unav.es>
- Date: Wed, 13 Jun 2007 17:21:04 +0200
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
Received on 2007-06-13Z14:21:04