Windows 10 - XPlained COM Port problems

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New Windows 10 laptop.

 

When I plug in my ATmega328P XPlained Mini, it is seen by Atmel Studio, and the COM port appears in Device Manager.

 

But Tera Term will not see the port:

 

With the port specified on the command line:

 

 

Trying to select the port from the menu:

 

My own "ComLed" - as mentioned here - also does not see it.

 

I'll try some more later...

 

An FTDI cable is seen OK.

 

Searching, I found these (duplicates?):

 

https://www.avrfreaks.net/forum/...

https://www.avrfreaks.net/forum/...

 

Which say the problems was "Eset antivirus" - but I haven't installed that.

 

I had changed the port number from Device Manager (to match the old PC), but changing it back made no difference.

 

Any ideas, anyone ?

 

This topic has a solution.

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Last Edited: Tue. Oct 6, 2020 - 09:05 AM
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Aha!

 

If I 'Run as Administrator', the terminals work OK.

 

Do I need to give some extra privileges to my user account?

 

(but why does it work for the FTDI cable?)

Top Tips:

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  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
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awneil wrote:
Do I need to give some extra privileges to my user account?

 

Maybe.

 

On some windows10 machines there is your account with Admin privileges, and then there is an ADMINISTRATOR account which actually has even higher properties.  It has to do with the microsoft account Windows tries to force down our throats.

 

awneil wrote:
(but why does it work for the FTDI cable?)

Because FTDI registered with Microsnot their drivers as "Good Guys" is my only explanation.  Sometimes when you install a device it needs to "look online" for a driver and usually it goes to teh Microsnot website.  If teh driver was previously registered with M$ then it will run without fuss.

 

JIm

 

EDIT:

https://www.ftdichip.com/Support...

 

I would rather attempt something great and fail, than attempt nothing and succeed - Fortune Cookie

 

"The critical shortage here is not stuff, but time." - Johan Ekdahl

 

"Step N is required before you can do step N+1!" - ka7ehk

 

"If you want a career with a known path - become an undertaker. Dead people don't sue!" - Kartman

"Why is there a "Highway to Hell" and only a "Stairway to Heaven"? A prediction of the expected traffic load?"  - Lee "theusch"

 

Speak sweetly. It makes your words easier to digest when at a later date you have to eat them ;-)  - Source Unknown

Please Read: Code-of-Conduct

Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB, RSLogix user

Last Edited: Mon. Oct 5, 2020 - 05:39 PM
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jgmdesign wrote:
Because FTDI registered with Microsnot their drivers as "Good Guys" is my only explanation.

During the AS7 installation (which I did before plugging-in the XPlained board), there were various driver installations - with checkboxes to "trust stuff from microchip". I ticked them.

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  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
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awneil wrote:
During the AS7 installation (which I did before plugging-in the XPlained board), there were various driver installations - with checkboxes to "trust stuff from microchip". I ticked them.

 

Yeah, I fall for that every time too......

 

There are numerous threads about that whole checkbox part.

 

I would check and see how many accounts are on your new laptop  Could be you arent logged in as you might think.

JIm

I would rather attempt something great and fail, than attempt nothing and succeed - Fortune Cookie

 

"The critical shortage here is not stuff, but time." - Johan Ekdahl

 

"Step N is required before you can do step N+1!" - ka7ehk

 

"If you want a career with a known path - become an undertaker. Dead people don't sue!" - Kartman

"Why is there a "Highway to Hell" and only a "Stairway to Heaven"? A prediction of the expected traffic load?"  - Lee "theusch"

 

Speak sweetly. It makes your words easier to digest when at a later date you have to eat them ;-)  - Source Unknown

Please Read: Code-of-Conduct

Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB, RSLogix user

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I don't like having all of these "accounts"--I have full Office suite (Word, Excel, etc, Microsoft Professional Plus 2019) installed on my machine...though MS is always telling me when I login to anything MS related that I need to "try" office 365.  In fact they make it almost impossible to find the non-365 version on their site.

 

I met with a group online (teams, or some such thing) & had to log in to an account they setup so we could chat....Days later when running a large spreadsheet, It was acting very slow compared to normal...found out I was not using MY office, but some web/remote  versions of their microsoft account, which apparently I was still logged into/or "active" on.  In fact, I believe I had even rebooted my computer once or twice in the interim (not 100% sure about this), yet was still using their office account not mine. 

 

My daughter asked "who are all of these people" on her Alexa, after I had contacted her a few times (the alexa is under my control).  I recognized this out-from-nowhere listing as being all of my phone contacts....it had not been there the prior 6 months, since only 2 names had previously been showing.   

When in the dark remember-the future looks brighter than ever.   I look forward to being able to predict the future!

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avrcandies wrote:
My daughter asked "who are all of these people" on her Alexa, after I had contacted her a few times (the alexa is under my control).  I recognized this out-from-nowhere listing as being all of my phone contacts....it had not been there the prior 6 months, since only 2 names had previously been showing.   

 

Yup, Microsoft is 'sharing' data with Amazon.  And if your phone has a link to any kind of account or you used it for a meeting, Teams, or Zoom etc, then your data/contacts is now available to the world.

 

People think I am nuts when I mention this stuff, but I see these comments all teh time, yet no one want to read the fine print.

 

This is why I am setting up a dedicated PC for Teams/Zoom etc, on its own subnet...my vain attempt to keep what I feel is mine.

 

But lets not derail Andys thread from its true issue.

 

Jim

I would rather attempt something great and fail, than attempt nothing and succeed - Fortune Cookie

 

"The critical shortage here is not stuff, but time." - Johan Ekdahl

 

"Step N is required before you can do step N+1!" - ka7ehk

 

"If you want a career with a known path - become an undertaker. Dead people don't sue!" - Kartman

"Why is there a "Highway to Hell" and only a "Stairway to Heaven"? A prediction of the expected traffic load?"  - Lee "theusch"

 

Speak sweetly. It makes your words easier to digest when at a later date you have to eat them ;-)  - Source Unknown

Please Read: Code-of-Conduct

Atmel Studio6.2/AS7, DipTrace, Quartus, MPLAB, RSLogix user

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jgmdesign wrote:
It has to do with the microsoft account Windows tries to force down our throats.
Windows is configurable per standard operating procedure as done locally (IT) or remotely (MSP) or at the OEM.

jgmdesign wrote:
If teh driver was previously registered with M$ then it will run without fuss.
Some Atmel Studio drivers can be an issue.

 


IT - Information Technology

MSP - Managed Services Provider

OEM - Original Equipment Manufacturer

Profile settings | Configure Autopilot profiles | Microsoft Doc

[mid-page]

Disable local admin account creation on the device. Organizations can decide whether the user setting up the device should have administrator access once the process is complete.

Local Accounts (Windows 10) - Microsoft 365 Security | Microsoft Docs

Create a local user or administrator account in Windows 10 (Microsoft)

Installation | Atmel Studio 7

[bottom]

  • Make sure your user has local administrator privileges

Setting up a new PC: The first steps @ AskWoody

by Susan Bradley

[1/3 page]

Step 1 – Do an initial cleaning

...

(Note: I initially set up the system with a non-Microsoft — i.e., local — account by not allowing it to connect to the Internet.)

...

[2/3 page]

Step 8 – Limit your Windows rights

 

"Dare to be naïve." - Buckminster Fuller

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If the port is visible in the list you get by running

wmic path Win32_SerialPort get Caption,Description,PNPDEviceID

on the command line, then the driver is fine....

 

Although, since it is listed under Serial Ports, then the driver should be working as expected... 

 

Has something else opened the port? COM ports on Windows cannot be opened with shared access... 

:: Morten

 

(yes, I work for Atmel, yes, I do this in my spare time, now stop sending PMs)

 

The postings on this site are my own and do not represent Microchip’s positions, strategies, or opinions.

Last Edited: Mon. Oct 5, 2020 - 06:58 PM
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Sometime port  "not found"  means something else is presently using it, or has not released it, if it was previously using it.  I had a serial app that would use a port, but even after the program was terminated, it seemed to  block anyone else from using it (until I rebooted the computer).  So even though the port is "there" is given a confusing error message saying that it is not.

When in the dark remember-the future looks brighter than ever.   I look forward to being able to predict the future!

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jgmdesign wrote:
Could be you aren't logged in as you might think.

 

It thinks it's a local account, with Admin privilege

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  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
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No, nothing else is using the port.

 

If something else had the port open, running the terminal as Admin wouldn't make any difference.

 

 

Caption                          Description             PNPDeviceID
mEDBG Virtual COM Port (COM131)  mEDBG Virtual COM Port  USB\VID_03EB&PID_2145&MI_01\6&1A9AD1BB&0&0001

 

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  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
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I had changed the port number from Device Manager (to match the old PC), but changing it back made no difference.

"who" were you when you did this?  admin?  someone else?  Maybe that would make a slight difference at the time of the change.

 

Note: Multiple serial ports cannot share the same COM port number.

  1. Restart your computer.

Note: Even if you change the COM port number back to the original number, you still need to restart your computer.

 

check the one about fax services, of all things, interfering

https://windowsreport.com/unable...

When in the dark remember-the future looks brighter than ever.   I look forward to being able to predict the future!

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avrcandies wrote:
"who" were you when you did this?

All of this is with the same account - as shown in #11

 

  1. Restart your computer.

Yes, I did that - shutdown, and then power-on again.

 

check the one about fax services, of all things, interfering

https://windowsreport.com/unable...

will do ...

Top Tips:

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  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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avrcandies wrote:
Sometime port  "not found"  means something else is presently using it

No, that shouldn't cause 'not found': the port should still be visible - but attempting to open it would give an error

 

Here we are with the FTDI cable, COM9:

 

 

The TeraTerm in the background currently has COM9 open - hence it appears in the title bar.

 

The TeraTerm in front of it is not connected, and I have opened the Serial Port dialogue: you can see that COM9 is listed - even though it is already in use by the other TeraTerm. 

If I click 'New Open', I get:

 

 

which tells me that the port is already in use.

 

This is different from the case with the XPlained - where Tera Term is saying 'Not Found' (see #1).

 

EDIT

 

Annotated screenshot

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  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
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Last Edited: Mon. Oct 5, 2020 - 10:10 PM
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avrcandies wrote:
check the one about fax services

I checked, and it showed that the service  was not started.

 

But now TeraTerm has decided that it will open the port:

 

 

surpriseangrycrying

 

 

 

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  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
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I don't have much trouble with the serial ports.  Some times I need to disable them and then re-enable them.  I think it's when I make a change to the port, like change the port number.

 

Anyway, the disable then enable thing is worth a try.

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COM One hundred thirty-one?  Ermagerd.  surprise

 

avrcandies wrote:

Days later when running a large spreadsheet, It was acting very slow compared to normal...found out I was not using MY office, but some web/remote  versions of their microsoft account, which apparently I was still logged into/or "active" on.

 

I wonder what that would do to my severely data-limited (and 600ms ping time) satellite connection.  I think I'm not going to use windows 10 ever (or avoid it for as long as I can).  S.

 

PS - I find LibreOffice does everything 'office' I need.  Then again, I'm not in collaboration with teams run by a PHB with Mordac in charge of the IT, either.  S.

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steve17 wrote:
I don't have much trouble with the serial ports. 

Neither do I - usually.

 

But, as I said, this is a new PC. It's also the first time I've worked on Win 10.

 

Some times I need to disable them and then re-enable them

But if that were the issue, how would running as Admin help?

 

Scroungre wrote:
COM One hundred thirty-one? 

 

https://www.avrfreaks.net/forum/ooo-err-what-comes-next

 

 

 

 

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  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
This reply has been marked as the solution. 
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awneil wrote:
now TeraTerm has decided that it will open the port

I've restarted the PC since then, and TeraTerm can still open the port.

 

And Jim's simple serial tester - which had also been unable to see it before.

 

So the problem (or, at least, its symptoms) has gone away - but I have no idea what the problem was, nor what "fixed" it.

 

frown

 

I'll mark this as the solution for now - as I'm no longer having the issue - but will update if anything becomes clearer ...

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  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
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I think I have had a USB3 hub (or maybe it was the host controller) lock up on my desktop and had to power down the stand-by (unplug) for a while to get it to start working again. At the time, I figured it was CMOS latch-up, but later I learned it had a firmware update.

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It was in a USB2 port, and the USB mouse & KB kept working.

 

And a hardware fault like that wouldn't have been overcome by running as Admin.

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  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
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Sometimes the issue isn't with the USB hub but in the USB host (software defect, fault is an incorrect token, apparent failure with one USB hub)

USB Hub Bug Hunting & Lessons Learned (PJRC)

 

USB hubs can be qualified wrt Windows 10.

Windows Hardware Compatibility Program | Microsoft Docs

 

"Dare to be naïve." - Buckminster Fuller

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but, again,  such things wouldn't have been overcome by running as Admin?

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  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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Yes though any USB hub issues more likely will be due to software defects (USB HCI driver, from the PC OEM)

 

"Dare to be naïve." - Buckminster Fuller

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awneil wrote:



 

Some times I need to disable them and then re-enable them

But if that were the issue, how would running as Admin help?

 

On my Win10 pro, it's not obvious how to make changes to the devices when running as a lowly user.  I need admin privileges and Windows doesn't give me a chance to enter the admin password if I right click on Start, then click on Device  Manager. 

 

I do it by putting a button for "computer management"  (compmgmt) on the start menu.

 

Right click on it and click "pin to start".

 



 

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I create a Desktop shortcut to Device Manager:

 

 

 

C:\Windows\System32\devmgmt.msc

 

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  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
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On Win10, just right click the start window icon, and select device manager!

 

(Possum Lodge oath) Quando omni flunkus, moritati.

"I thought growing old would take longer"

 

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I explained that in my previous post.  That allows me to look but not touch.  How come you got a better Win10 than me.  smiley

 

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with the desktop shortcut, you can specify 'Run as Admin' (although I haven't had to):

 

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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Anything in the Windows event viewer ? I don't have a VM spun up at the mo to advise which area to look in.

 

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steve17 wrote:
How come you got a better Win10 than me.

Mine:

Is that "better" I don't know....

It is what it is.

Jim

 

 

(Possum Lodge oath) Quando omni flunkus, moritati.

"I thought growing old would take longer"

 

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steve17 wrote:
How come you got a better Win10 than me.

What Win-10 do you have - 'home' or 'pro' or ... ?

 

But the message is about your (insufficient) user privileges ...

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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I see that my current Win10 allows me to do the right click on Start, click Device Manager.   Then right click on the port, click properties, click "Change settings" pn General tab, etc..  I don't think you could do that when I started using Win 10. 

 

In any event, getting admin privileges first gets you there quicker.  Just right click on the port, and there it is.  Of course I can't guarantee this next week.  smiley

 

 

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awneil wrote:
with the desktop shortcut, you can specify 'Run as Admin' (although I haven't had to):
If you put computer management (compmgmt.msc) shortcut on the start menu, you can get more than Device Manager.  I guess Device Manager is what I use most though.

 

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steve17 wrote:
  I guess Device Manager is what I use most though.

It's certainly what I use most - hence the direct shortcut to it.

Top Tips:

  1. How to properly post source code - see: https://www.avrfreaks.net/comment... - also how to properly include images/pictures
  2. "Garbage" characters on a serial terminal are (almost?) invariably due to wrong baud rate - see: https://learn.sparkfun.com/tutorials/serial-communication
  3. Wrong baud rate is usually due to not running at the speed you thought; check by blinking a LED to see if you get the speed you expected
  4. Difference between a crystal, and a crystal oscillatorhttps://www.avrfreaks.net/comment...
  5. When your question is resolved, mark the solution: https://www.avrfreaks.net/comment...
  6. Beginner's "Getting Started" tips: https://www.avrfreaks.net/comment...
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awneil wrote:

 

 

with the desktop shortcut, you can specify 'Run as Admin' (although I haven't had to):

 

 

 

You can make a start menu button to always do the "run as admin" and request the admin password.  If I don't set it up, I forget and then I have to start over..  To set that up, right click the button.  Then click More, then click "Open file location".  That will give you a Windows Explorer that points to the shortcut.  Right click the shortcut, click Properties, Advanced.  Check "Run as administrator".

 

 

 

Last Edited: Wed. Oct 7, 2020 - 07:55 PM