Add Available serial port into pop up menu

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Hi,
I wish to get a list of available serial port in my computer and display them in the pop up menu. code:
a=instrfind('Type','Serial');
for i=1:length(a)
text{i}=a(i);
end
set(handles.popup1,'String',text);
guidata(hObject,handles);
but, there's nothing shown in the pop up menu. May i know which part i did wrongly? Thanks
  1 Comment
Walter Roberson
Walter Roberson on 17 Jun 2012
Please do not name a variable "text" as that conflicts with the important graphic function "text".

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Answers (1)

Walter Roberson
Walter Roberson on 17 Jun 2012
a = instrfind('Type','Serial');
for i = 1:length(a)
portnames{i} = get(a(i), 'Port')
end
set(handles.popup1, 'String', portnames);
  3 Comments
Shawn Chang
Shawn Chang on 21 Jun 2012
size(a)
ans =
0 0
>> get(a(1))
??? Index exceeds matrix dimensions.

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