Re: how to create a timer controlled analog-in command from Caleb Tennis on 2006-06-16 (gmane.linux.comedi)

From: Caleb Tennis <caleb_at_aei-tech.com>
Date: Fri, 16 Jun 2006 06:30:09 -0400

>
> Once I tried running comedi_calibrate with channels 1-5 directly  
> shorted out
> to ground, separated from my circuit.  Then I connected my circuit  
> to channels
> 1-5.  I measured the voltage at the board with a voltmeter, where  
> the circuit
> output is connected to the DAQ.  Then I ran inpn.c.  Here's my  
> results:

Make sure you have your signal ground connect to AIGND on the NI  
terminal strip.  Also make sure you're running inpn with AREF_GROUND  
and not AREF_DIFF or something else.  It's an option you can pass  
to ./inpn, something like ./inpn -a 0 I believe.

Caleb

Received on 2006-06-16Z09:30:09