If s.IsContinuous is set to true or to false, there is no difference in my results. The code does not seem to carry out the task of s.IsContinuous = true. It registers that I have set it to true, it just does not follow. It will only output the signal once. I am outputting an analog signal and read it off an oscilloscope.
My aim is to allow the square wave to run until I stop it as I require it for varying lengths of time. It is impractical to have to define the number of square waves using queueOutputData each time due to the varying number of waves necessary and it will also involve very large numbers.
I would appreciate any help.
I am using Matlab 2013a and NI 9269, below I show the simple code and Matlab's response.
Many thanks, Aiveen
CODE:
s=daq.createSession('ni');
s.addAnalogOutputChannel('cDAQ9181-1980EF4Mod1','ao0','Voltage');
s.Rate=25;
s.IsContinuous = true
s.queueOutputData(repmat([0 1],1,12).');
s.startBackground;
Also tried for s.queueOutputData(10*sin(linspace(0,2*pi,1000)).');
REPLY:
EDU>> ni6929_step1
s =
Data acquisition session using National Instruments hardware:
Will run continuously at 25 scans/second until stopped.
Number of channels: 1
index Type Device Channel MeasurementType Range Name
----- ---- -------------------- ------- --------------- ---------------- ----
1 ao cDAQ9181-1980EF4Mod1 ao0 Voltage (Diff) -10 to +10 Volts
Properties, Methods, Events
s.startBackground;
