Serial Port won't clear after halting debugging

I am debugging code using the serial port. If I exit the debug session normally via <shift>F5, I cannot reopen the serial port upon restarting a new debug session. I get the error listed at the bottome of this post. I have to shutdown matlab completely to clear everything.

I can understand why the port is still open (it was not closed upon exiting debug), however I need a way to "clear" it and reopen it after the next debug session.

I issue the 'delete(instrfindall)' at the start of the program but this does not work.

Thanks for any ideas, Fritz

==============================================
??? Error using ==> serial.fopen at 72
Cannot connect to the COM5 port. Possible reasons are another
application is connected to the port or the port does not exist.
Error in ==> spectrometer_monitor at 39
fopen(s);

[Ariel]

Hello Fritz.

My name is Ariel and I'm dealing the same problem. have you found solution?

Thank you

Ariel

[Ivan Peric]

You can try this: -right click myCoumputer -properties -device manager -serial -ports -right click your port -disable -enable

Answer 1

[Adam]

instrreset

is your friend!

Clear the serial object then issue an instrreset.

[Fritz Sonnichsen]

Adam, I tried it (below) but I still have the same problem.

Fritz

delete(instrfindall)

instrreset;

s = serial('COM5');

set(s,'BaudRate',115200);

set(s,'InputBufferSize',80000); %won't work without this

fopen(s);

[Adam]

Try:

delete(instrfindall)

clear s;

instrreset;

...rest of the code...

[Adam]

From MATLAB documentation on delete:

"Remarks

When you delete obj, it becomes an invalid object. Because you cannot connect an invalid serial port object to the device, you should remove it from the workspace with the clear command."

[Adam]

Did that work?