Lamp VS Guage - App Designer

Question

Jose Santos 2020-9-18

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/595921-lamp-vs-guage-app-designer

评论： Joep van Baren 2024-1-25

采纳的回答： Jose Santos

在 MATLAB Online 中打开

Hi,

I am trying to build an app to instrumentate my Simulink Real time application. The version is 2020a.

On the startup function I call the instrumentation starter, which goes like this.

function setupInstrumentation(app)
    app.hInst  = SimulinkRealTime.prototype.Instrumentation(app.mdl);
    app.hInst.connectScalar(app.ReadyLamp,[app.mdl '/Initialization_Check'],14); % Link a boolean signal to a lamp on the app
    app.StartStopButton.Icon = app.startIcon;
    app.StartStopButton.Text = 'Start';
end

The ConnectScalar line then produces the following error:

Error using SimulinkRealTime.prototype.Scalar
Unknown property name for hScalar
Error in SimulinkRealTime.prototype.Instrumentation/connectScalar

I tried to find the parameter and aparently it is the output of the script. So I tried with a Guage instead of a Lamp, and this code works fine.

app.hInst.connectScalar(app.Gauge,[app.mdl '/Initialization_Check'],14); % Link the same signal to a Guage

So, we can instrumentate a Scalar to a Guage, but not to a lamp? Is there a work around to link the signal to the lamp?

Thank you in advance.

EDIT:

I think I got an update about how this does not work.

The Gauge display has a entry for the value to display, while the Lamp only has a parameter for the color of the lamp. What I think it is required is a way to change the color of the lamp depending on the value of the signal. this link seems to have a connection between the Simulink signal and the Visible parameter of the lamps, but I don't understand what it is happening and no example is shown, just code. Is it also possible to link the signal to the color parameter of the lamp?

This code can change the visibility parameter of the lamp, (signal==1 -> 'On', signal~=1-> 'Off')

app.hInst.connectScalar(app.Lamp,'Signal_location',1, 'PropertyName', 'Visible', 'Callback', @(t,d)string(slprivate('onoff',d==1)));

Looking for an answer to change the color.

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Jose Santos 2020-10-23

编辑：Jose Santos 2020-10-23

Hi Jon.

Many thanks for your comment.

The base idea, was to change the color of the Lamp depending on the value of a "state" signal, (e.g. red=0, amber=1, green=2). I don't want to increase the signal size (passing from a double to a wide signal), just to create the RGB color on the simulink. As it is more of an informative nature, I would prefer to have the calculations of the color being done on the app, rather than on the target/ Simulink model.

We have now updated to the v2020b, and the instrumentation object improved significantly. But I still cannot find the references material about the personalised callbacks. My main issue, is that I seem that I cannot acess the value of the streamed signals before streaming them to a editfield or gauge. I think there should be a way to pass the value to the callback, but I cannot find how to do it.

This, then, causes other issues. I tried to plot the difference between two signals (using maybe connectline to axis on the app). Plotting the signals works fine, but to plot the subtraction of one signal to the other is beyond my current capabilities. I reckon I would need a callback somewhere, instead of connectline.

Timothy 2022-9-27

Thanks for posting this, I was having a hard time finding this information.

It's a bit ridiculous that we have to know to use a hidden function to connect the uilamp object with the instrument data stream. Shouldn't there at least be some default behavior where it is able to connect the scalar data stream to the uilamp and these additional settings are only necessary to deviate from the default - rather than the code just failing.

Joep van Baren 2024-1-25

I completely agree with Timothy's statement. Thanks for the explanation, but it is very illogical.

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Answer 1

Jose Santos 2020-11-6

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/595921-lamp-vs-guage-app-designer#answer_536305

编辑：Jose Santos 2020-11-6

在 MATLAB Online 中打开

Finally, with the help of the Speedgoat Support, I can change the color of the lamp depending on the signal (for V2020b) directly, without the need for a Guage as intermidiate step.

My solution lines:

app.hInst  = slrealtime.Instrument(app.mdl);                      
app.hInst.connectScalar(app.OnTargetLamp,[app.mdl '/RIG_Control'],1, 'PropertyName', 'Color', 'Callback', @app.Lampper);
            
function color=Lampper (~,~,d)
    if d
        color=[0,1,0]; % If value == 1, color is green.
    else
        color=[1,0,0]; % If value == 0 or not defined, color is red.
    end
end

As I store the Instrumentation object on the App variables, the syntax can be slightly different than normal, but I also but the generic syntax below for future reference:

app.hInst  = slrealtime.Instrument('Simulink Model');                      
app.hInst.connectScalar('-GUI Lamp','-Block Path','-IO number', 'PropertyName', 'Color', 'Callback', @'app.-fcnName');
            
function '-dummy out variable'= '-fcnName'(app,time,signal)
    'algorithm to deal with the signal'
end