showing Results of Serialportlist in a UITextArea

Question

Jason 2020-11-26

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/663863-showing-results-of-serialportlist-in-a-uitextarea

评论： Avratanu Biswas 2020-11-27

采纳的回答： Jason

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Hello, I would like to display the available ports on my PC using serialportlist("available")

I have come across the evalc..code below

              portstring = evalc('display(serialportlist("available"))')
              ReportMessage(app,portstring); 
              

Reportmessage is my own function that adds to a textarea

It works except I get some rubbish first:

  1×2 <a href="matlab:helpPopup string" style="font-weight:bold">string</a> array
    "COM5"    "COM10"

Is there a better way to display the results of serialportlist in a uitextarea?

Thanks

Jason

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Answer 1

Jason 2020-11-27

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https://ww2.mathworks.cn/matlabcentral/answers/663863-showing-results-of-serialportlist-in-a-uitextarea#answer_557548

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This seems to work

              freeports = serialportlist("available")
              str=sprintf('%s\t', freeports{1:end});              
              ReportMessage2(app,['Comms Available: ',str]); 

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Avratanu Biswas 2020-11-27

Glad that it worked for you . Using "evalc" never a good idea.( Why Avoid the eval Function? ) - might answer you the reason behind those additional unwanted texts in your very initial post.

Cheers !

A

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Answer 2

Avratanu Biswas 2020-11-26

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https://ww2.mathworks.cn/matlabcentral/answers/663863-showing-results-of-serialportlist-in-a-uitextarea#answer_557203

编辑：Avratanu Biswas 2020-11-26

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In case I understood your question correctly, what if you write it in this way

portstring = serialportlist("available"); % instead of using evalc
app.UItextarea.Value = portstring; % using the given name of the UItextarea

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Jason 2020-11-27

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Hello, due to me ReportMessage concatenating vertically, this doesn't work.

        function ReportMessage(app,msg)    %For message box on config tab
            currString=get(app.MessagesTextArea2,'Value');            
            currString=[currString;{char(msg)}];  %add to top of message box
            app.MessagesTextArea2.Value=currString;
            drawnow;           
            scroll(app.MessagesTextArea2,'bottom');
Error using matlab.ui.control.TextArea/set.Value (line 101)
'Value' must be a character vector, or a 1-D array of the following type: cell array of character vectors, string, or categorical.