lamp on off in app designer

Question

Saad Oussaada 2020-3-2

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/508587-lamp-on-off-in-app-designer

评论： Saad Oussaada 2020-3-3

hi everyone !! I need a help

I had writen a program in App designer that can turn on or off a lamp with arduino , the probleme is it runs for one time , I want to add a loop but it doesn't work

someone can help me please

this is the program

a = arduino('com8','uno');

b = readDigitalPin(a,'D3');

if b == 1

app.Lamp.Enable = 'on';

else

app.Lamp.Enable = 'off';

end

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Answer 1

Kojiro Saito 2020-3-3

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/508587-lamp-on-off-in-app-designer#answer_418205

在 MATLAB Online 中打开

In order to run iteratively, you need to call readDigitalPin in while loop or for loop.

If you want to run specified times, for example, 100 times with an interval of 1 second, add the following in startUpFcn callback.

a = arduino('com8','uno');
iter = 0;
while iter < 100
    b = readDigitalPin(a,'D3');
    if b == 1 
       app.Lamp.Enable = 'on';
      
    else
       app.Lamp.Enable = 'off';
    end
    iter = iter + 1;
    pause(1);
end

Alternatively, you can use timer class.

If you want to run forever, you can use while loop in startUpFcn callback.

a = arduino('com8','uno');
while true
    b = readDigitalPin(a,'D3');
    if b == 1 
       app.Lamp.Enable = 'on';
      
    else
       app.Lamp.Enable = 'off';
    end
    pause(1);
end