How to turn on a GPIO (Raspberry Pi 4B) for one second

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Nitesh Ramdin 2020-11-24

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/660733-how-to-turn-on-a-gpio-raspberry-pi-4b-for-one-second

编辑： Nitesh Ramdin 2020-11-24

I am currently building a Raspberry pi autonomous using Mathlab neural network. I am using a Pi camera to capture images. Once an image is captured, with either a forward, left or right output command.

How do i go about turning on the string(label) on for one second only.

I could maybe turn on the forward for one second and implement a stop command to all the pins.

I am a begginer at this and need some direction.

Here is my code as below:

%% Algorithm rev2
for i = 1:1
    img = snapshot(cam);
    % Preproccessing`````````````````````
    imgNew = imresize(img,[227 227]); % resize image
    [YPred,probs] = classify(trainedNetwork_1,imgNew);
    figure(1);
    imshow(imgNew)
    label = YPred;
    title(string(label) + ", " + num2str(100*max(probs),3) + "%"); 
end
    
if string(label) == "Forward"%fwd
    for W = 1:1
        writeDigitalPin(mypi, 5, 1);
        writeDigitalPin(mypi, 6, 0);
        writeDigitalPin(mypi, 27, 1);
        writeDigitalPin(mypi, 22, 0);
    pause(0.5);
    end
elseif string(label) == "Left"%pivotleft
    for Y = 1:1
        writeDigitalPin(mypi, 5, 0);
        writeDigitalPin(mypi, 6, 1);
        writeDigitalPin(mypi, 27, 1);
        writeDigitalPin(mypi, 22, 0);
        pause(0.5);
    end
elseif string(label) == "Right"%pivotleft
    for Z = 1:1
        writeDigitalPin(mypi, 5, 0);
        writeDigitalPin(mypi, 6, 1);
        writeDigitalPin(mypi, 27, 1);
        writeDigitalPin(mypi, 22, 0);
        pause(0.5);    
    end    
end    