logData too few inputs?
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Hey Everyone,
I am trying to write some code with data acquisition that will stop background data collection when a signal is greater than 1.0, as well as log the data I am collecting. I think I am just missing something simple. As the error I am getting says the logData function doesn't have enough input arguments. However, I believe I am passing it all that it needs in my function (src,event,fid1). Suppressing the logData line fixes all issues. Please see my code below, and let me know if I can provide more details.
Best, Josh
clear all
clc
% Work around for hardware clocking issue
daq.reset;
daq.HardwareInfo.getInstance('DisableReferenceClockSynchronization',true);
% Creates a data acquisition session
s = daq.createSession('ni');
% Add an input channel for the load cell
ch1 = addAnalogInputChannel(s,'Dev2',0,'Voltage');
% Preps a file for data write
fid1 = fopen('log.bin','w');
% Sets the listener call rate to default (10 Hz)
s.IsNotifyWhenDataAvailableExceedsAuto = true;
% Configure a new listener to process data until a stop condition is met
lh = addlistener(s,'DataAvailable',@stopWhenExceedOneNm);
% Configure the session to acquire continuously
s.IsContinuous = true;
% Start acquiring data in the background
s.startBackground()
The function being called:
function stopWhenExceedOneNm(src,event,fid1)
if any(event.Data > 1.0)
disp('Event listener: Detected Voltage exceeds 1, stopping acquisition')
% Continuous acquisition stopped explicitly
src.stop()
plot(event.TimeStamps,event.Data)
else
plot(event.TimeStamps,event.Data);
% Log data
logData(src,event,fid1);
disp('Event listener: Continuing to acquire')
end
end
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