Issues with Breaking while loop in Appdesigner.

Question

kintali narendra 2020-10-29

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/630528-issues-with-breaking-while-loop-in-appdesigner

评论： Franck paulin Ludovig pehn Mayo 2022-1-12

在 MATLAB Online 中打开

I need to break while loop - which reads a sensor value - I want to break the while loop when pushbutton is pressed.

I tried using "Tag" handle in pushbutton to break the loop - it breaks loops before pushing the pushbutton.

Error:

Error using matlab.ui.control.Button/get

Unrecognized property Value for class Button.

Error in IRgauge/ReadDistanceButtonPushed (line 36)

stop_state = get(app.CLOSEButton,'Value');

Error using matlab.ui.control.internal.controller.ComponentController/executeUserCallback (line 382)

Error while evaluating Button PrivateButtonPushedFcn.

Code for reading sensor in appdesigner "Code View"

        function ReadDistanceButtonPushed(app, event)
            CommPort = serialport('COM30',9600);
            while 1
                R = readline(CommPort);
                R = str2double(R);
                app.DISTANCEGauge.Value = R;
                drawnow();
                stop_state = get(app.CLOSEButton,'Value'); % to break infinity loop
                if stop_state
                    break;
                end
            end
        end
        
        % callback function breaking infinity loop
        function CLOSEButtonPushed2(app, event)
          close all; clc; delete(instrfind);
        end