Searching \ for '[EE]:Couldn't open port...' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/ios.htm?key=port
Search entire site for: 'Couldn't open port...'.

Exact match. Not showing close matches.
PICList Thread
'[EE]:Couldn't open port...'
2001\01\22@123337 by Jose S. Samonte Jr.

picon face
Please help me anyone, please?
I have been using the serial port (COM1) of my computer.
But after a while, the port be opened anymore?
What is the problem here? What is the worst case scenario?


____________________________________________________________________
Get free email and a permanent address at http://www.netaddress.com/?N=1

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\01\22@133427 by Dan Michaels

flavicon
face
At 10:33 AM 1/22/01 MST, you wrote:
>Please help me anyone, please?
>I have been using the serial port (COM1) of my computer.
>But after a while, the port be opened anymore?
>What is the problem here? What is the worst case scenario?
>

If using Win9x, that's your problem. Try reboot.
Also, check the Control panel: "modems", and
"system properties/device managers" for possible
conflicts.

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\01\22@141202 by hard Prosser

flavicon
face
Others may have more idea than me but:-
I guess you have tried rebooting the machine?
Are you trying to run another application at the same time - it may be
grabbing the port for it's own uses - printer, dongle whatever.
Have you installed any new hardware or software since you last used the
port?
Have you changed any configuration settings on any software (or hardware)
since you last used the port.
These are the most common causes I have had for this sort of problem. It's
not always obvious what has been changed.

Failing being able to undo any of the above, you may be able to run a
system utility to check your PC for conflicts in the setup - this will
depend on what operating system you are running or you may be able to
download diagnostics from the web,

If you have truly blown the port driver or controller you may have to
purchase a separate I/O card to provide a new com port (or two). If you can
disable the old one so much the better in this case but you should be able
to assign the new one to a different number (COM3:, COM4 etc.).
You may even be able to recover the I/O card from a scrapped machine at low
(zero?) cost..

Richard P





                   "Jose S.
                   Samonte Jr."          To:     spam_OUTPICLISTTakeThisOuTspamMITVMA.MIT.EDU
                   <.....dyoweeKILLspamspam@spam@USA.NE        cc:
                   T>                    Subject:     [EE]:Couldn't open port...
                   Sent by: pic
                   microcontrolle
                   r discussion
                   list
                   <PICLIST@MITVM
                   A.MIT.EDU>


                   23/01/01 06:33
                   Please respond
                   to pic
                   microcontrolle
                   r discussion
                   list






Please help me anyone, please?
I have been using the serial port (COM1) of my computer.
But after a while, the port be opened anymore?
What is the problem here? What is the worst case scenario?


____________________________________________________________________
Get free email and a permanent address at http://www.netaddress.com/?N=1

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\01\22@143033 by Stuart O'Reilly

flavicon
face
I had a similar problem after installing a IR mouse to a computer of mine.
The IR mouse didn't work so I un-installed the software, after that I
couldn't use that com port any more.  After days of checking system files,
files that start up on boot up etc etc etc, I gave up. I re-installed
windows and it burst back into life, drastic action but it was the quickest
course and it worked. The error message unable to open comm port usually
means that your comm port is working, it's just that another piece of
software has opened it before you, finding what bit of software has opened
it is not as easy as one might think.

Regards
Stuart O'Reilly
{Original Message removed}

2001\01\22@152827 by Olin Lathrop

face picon face
> I have been using the serial port (COM1) of my computer.
> But after a while, the port be opened anymore?
> What is the problem here?

Probably cockpit error.  Another application or another instance of the same
application is already using the COM port.

> What is the worst case scenario?

Life as we know it will cease to exist, all because YOU forgot to release
the COM port.


*****************************************************************
Olin Lathrop, embedded systems consultant in Devens Massachusetts
(978) 772-3129, olinspamKILLspamembedinc.com, http://www.embedinc.com

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\01\22@153643 by Dan Michaels

flavicon
face
Stuart O'Reilly wrote:
......
The error message unable to open comm port usually
>means that your comm port is working, it's just that another piece of
>software has opened it before you, finding what bit of software has opened
>it is not as easy as one might think.


Yes, another thing. Under win9x, you can normally jump back and
forth between windose applications that use the same port - I use
PIC programmer and laserjet off the same port via a switch box, etc.

However, if you try running a DOS program that uses a port, like
the Telix term_emulator, in addition to a windose connection where
both talk to the same modem, they are completely mutually-exclusive.
Once windose or DOS commandeers the serial port the other is
excluded, and you can hang the computer by trying a connection.
Port conflicts.

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\01\22@173938 by Dal Wheeler

flavicon
face
You also might check to see if the it's still set correctly in the bios.
Sometimes you can get goofy behavior if the cmos battery starts to fail.
----- Original Message -----
From: Jose S. Samonte Jr. <.....dyoweeKILLspamspam.....USA.NET>


Please help me anyone, please?
I have been using the serial port (COM1) of my computer.
But after a while, the port be opened anymore?

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


More... (looser matching)
- Last day of these posts
- In 2001 , 2002 only
- Today
- New search...