Add Available serial port into pop up menu

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Shawn Chang
Shawn Chang 2012-6-17
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 个评论
Walter Roberson
Walter Roberson 2012-6-17
Please do not name a variable "text" as that conflicts with the important graphic function "text".

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回答（1 个）

Walter Roberson
Walter Roberson 2012-6-17
a = instrfind('Type','Serial');
for i = 1:length(a)
portnames{i} = get(a(i), 'Port')
end
set(handles.popup1, 'String', portnames);
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Shawn Chang
Shawn Chang 2012-6-21
size(a)
ans =
0 0
>> get(a(1))
??? Index exceeds matrix dimensions.

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