Re: [avrdude-dev] [bug #22234] WINDOWS version: HOWTO: Specify Serial Ports Larger than COM9

[Bob Paddock]

Usually COM ports above nine have happened because of plugging
in multiple USB Virtual Serial Port Devices; I'm
at COM33 on this machine right now :-( .  To Windows
each unique USB serial number looks like a new device,
so you get a new COM port number, even if it is the
same device/different unit.  Anyone know how to stop that??

Assuming you don't have nine real COM ports you can
go to the Hardware Device Manager in Windows
Control Panel.  Then goto System/"Ports (COM & LPT)".
Select the properties of the port that is above nine,
got to the Port Settings tab then click 'Advanced'.

Select something less than ten, it will tell you
that the device is in use even if it is is not.
Now use this 'new' COM port with AVRDude.

You need to have Administrate Rights to get the 'Advance'
button to not be grayed out.

On Tue, 05 Feb 2008 14:20:40 -0500, Stefan Brueck  
<address@hidden> wrote:

> URL:
>   <http://savannah.nongnu.org/bugs/?22234>
>
>                  Summary: WINDOWS version: HOWTO: Specify Serial Ports

> HOWTO: Specify Serial Ports Larger than COM9
> http://support.microsoft.com/?scid=kb%3Ben-us%3B115831&x=7&y=10