Dio triggering (and differential measurements)

Hello,
I still have a problem with that differential measurement.
It have been working with same hardware but not with comedi.
So if anybody knows how differential measurements can be done
so that measuring channel 0 differentially will have same
results as measuring 0 and 8 channels with ground reference
and calculating difference of physical values of those, it
would be nice to hear how can that be done.

Another problem is related to digital triggering. I want
comedi_command to start reading the data after digital line
triggering? I trigger that channel outside the PC from hardware
I measure. Can that be done with INSN_INTTRIG instruction?
What parameters should I use?

My card is NI 6032E, analog input subdevice number is 0 and dio
subdevice number 2 and dio channel 0.

Br,
 	Santeri

Received on 2006-01-13Z15:03:54