Start/stop button Matlab App
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I have an app that outputs a predetermined set of data in the background and plots the inputs at the same time. The program begins when I press the start button. The 'start' button then becomes a 'stop' button. I want the button to display 'start' again when all the data has been outputted. How do I do this?
I thought about pausing for the amount of time that the data takes to run, but that would that stop the program from plotting?
% Button pushed function: STARTButton
function STARTButtonPushed(app, event)
if app.ButtonState==0
app.FileName = [num2str(app.LowV.Value),'-',num2str(app.HighV.Value), 'akV_',num2str(app.AMTFrequency.Value), 'Hz_', num2str(app.Fill.Value), 'ml',app.Filename.Value];
app.ButtonState=1;
app.STARTButton.Text = 'Stop';
app.File=fopen(app.FileName,'a');
fprintf(app.File,'%s\n','Time[s] Low voltage[kV] HASEL[kV] High voltage[kV] Force[N] Displacement[mm]');
% Charging
% trek voltage signals
lowV = (app.LowV.Value*1000/app.Amplification)*ones(5*app.SamplingRate,1);
highV = (app.HighV.Value*1000/app.Amplification)*ones(7*app.SamplingRate,1);
noV = 0*ones(app.SamplingRate,1);
trekV = [lowV; highV; noV];
% relay 1
Relay1on = 5*ones(4*app.SamplingRate,1);
Relay1off = 0*ones(9*app.SamplingRate,1);
Relay1 = [Relay1on; Relay1off];
% relay 2
Relay2on = 5*ones(11*app.SamplingRate,1);
Relay2off = 0*ones(2*app.SamplingRate,1);
Relay2 = [Relay2on; Relay2off];
% AMT signal
app.AMTtime = linspace(0,app.Cycles.Value/app.AMTFrequency.Value,app.SamplingRate*app.Cycles.Value/app.AMTFrequency.Value)';
AMTstart = app.MinForce.Value*ones(size(Relay2));
amplitude = (app.MinForce.Value - app.MaxForce.Value)/2;
offset = (app.MinForce.Value + app.MaxForce.Value)/2;
AMTon = (offset + amplitude*cos(2*pi*app.AMTFrequency.Value*app.AMTtime))/app.ForceConversion;
AMT = [AMTstart; AMTon];
Relay1 = [Relay1; zeros(size(AMTon))];
Relay2 = [Relay2; zeros(size(AMTon))];
trekV = [trekV; zeros(size(AMTon))];
queueOutputData(app.Session, [trekV,Relay1,Relay2,AMT]);
% zero everything
queueOutputData(app.Session, zeros(app.SamplingRate,4));
startBackground(app.Session);
%once this data has been outputted then I want the button to say 'stop'
else
app.ButtonState=0;
app.STARTButton.Text = 'Start';
stop(app.session)
% discharge capacitors
Relay1 = 5*ones(app.SamplingRate,1);
Relay2 = Relay1;
trekV = zeros(app.SamplingRate,1);
AMT = trekV;
queueOutputData(app.Session, [trekV,Relay1,Relay2,AMT]);
startBackground(app.session)
pause(2)
stop(app.Session);
pause(2)
fclose(app.File);
% delete(lh1)
end
1 个评论
Thomas Satterly
2019-11-13
I think you either need some way of determining the state of your background application or pass along a callback method in the "startBackground" call that's called once it's finished. I would recommend a callback method, as continuously checking for the state from the caller is wasteful.
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2019-11-13
2019-11-13
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