MATLAB documentation lists the following example to acquire data in the background by creating a session and adding a listener to access the acquired data using an anonymous function. For a continuous background generation, add a listener event to queue additional data to be output:
s = daq.createSession('ni');
s.addAnalogOutputChannel('cDAQ1Mod2', 0, 'Voltage');
s.IsContinuous = true;
s.Rate = 10000;
data = linspace(-1, 1, 5000)';
lh = s.addlistener('DataRequired', ...
@(src,event) src.queueOutputData(data));
s.queueOutputData(data)
s.startBackground();
% perform other MATLAB operations during the generation.
The operation is continuous,
s.stop();
delete(lh);
As to how you can add a trigger connection and send data to computer for processing, you can refer to the link provided below: http://www.mathworks.com/help/daq/ref/addtriggerconnection.html#bt_7mfo-1
