Session Based Multiple DAQ Triggering

Hello, I am using the latest 64bit matlab version (2011b) to send and receive a signal on multiple data acquisition devices (4 x NI 6259). I am having some trouble using the session based interface to trigger multiple data acquisition devices using a digital pulse. Does anyone know of any tutorials or examples i can use? Any information or pointer in the right direction would be of great help. Thanks,

Fernando

Answer 1

[Manisha]

Hi Fernando,

DAQ R2012a prerelease has added new functions that you can use to start your acquisition using an external trigger (digital pulse). If you have a valid licence you can download R2012a here.

You can modify the below code to suit your requirements:

s = daq.createSession('ni');
s.addAnalogInputChannel('Dev4', 0, 'Voltage');

The below command will add a external start trigger connection from an external source( i.e. your digital pulse) to the PFI0 terminal on Dev4.

s.addTriggerConnection('External','Dev4/PFI0','StartTrigger');

Your acquisition will now start when the device receives a digital rising edge at PFI0 terminal

s.startForeground();

Hope that helps,

Manisha