How to Turn LED blinking on and off using Toggle button?

Question

Sanjay Yadav 2017-2-1

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https://ww2.mathworks.cn/matlabcentral/answers/322902-how-to-turn-led-blinking-on-and-off-using-toggle-button

评论： Stephen23 2021-2-14

On a toggle button callback, I'm doing this:

while button_state == get(hObject,'Max')
    writeDigitalPin(a,'D3',1);
    writeDigitalPin(a, 'D6' ,0);
    pause(.5);
    writeDigitalPin(a,'D3',0);
    writeDigitalPin(a, 'D6' ,1);
    pause(.5);
end
if button_state == get(hObject,'Min')
    writeDigitalPin(a, 'D3' ,0);
    writeDigitalPin(a, 'D6' ,0);
end

Now problem is once LED starts blinking, they wont stop and blink continuously, even after I turn toggle button "off". Help me solving the logic.

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Stephen23 2021-2-14

http://web.archive.org/web/20210214185503/https://www.mathworks.com/matlabcentral/answers/322902-how-to-turn-led-blinking-on-and-off-using-toggle-button

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Answer 1

Image Analyst 2017-2-1

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https://ww2.mathworks.cn/matlabcentral/answers/322902-how-to-turn-led-blinking-on-and-off-using-toggle-button#answer_252938

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You're not updating button_state inside the loops. You need to do that

while button_state == handles.btnToggle.Max
    writeDigitalPin(a,'D3',1);
    writeDigitalPin(a, 'D6' ,0);
    pause(.5);
    writeDigitalPin(a,'D3',0);
    writeDigitalPin(a, 'D6' ,1);
    pause(.5);
    % Update button status
    button_state = handles.btnToggle.Value;  % Or however you get it.
end