[time-nuts] Did my Tbolt die ?

paul swed paulswedb at gmail.com
Sat Jul 17 15:31:20 EDT 2010


It is a windows thing
James thanks for the very helpful ways to cure it.
I need to do that on a couple of modern usb ports

On Sat, Jul 17, 2010 at 9:09 AM, Bob Paddock <bob.paddock at gmail.com> wrote:

> On Sat, Jul 17, 2010 at 5:17 AM, Neville Michie <namichie at gmail.com>
> wrote:
>
> > I have had problems with TBolts on PCs. The COM port assignments seem to
> be
> > a bit volatile,
> > plug in a different mouse or other user and you may find the COM port has
> > been assigned to it.
> > I have never been able to confidently cope with this problem, I just keep
> > hacking the
> > system and sooner or later I get the COM port right with the right
> settings
> > and all is well.
> > There seem to be up to 3 layers to get right.
> > This may be because I use USB to serial converters or just be inherent to
> > the later Windows OS.
> > cheers, Neville Michie
>
>
> If you drill down under the Advanced button in the Serial Port Control
> panel
> area you can reset the Windows COM port for a single port.
> If you know the port is not in use, ignore the message that tells you that
> it is in use, when you change the port number.
>
> You can also search the Windows registry for the "COM Port
> Arbitrator". It is a 256 binary bit map of the assigned, and the
> next to be assigned, COM port.  That is where you reset the ever
> incrementing COM port number.
>
>
> If you are using a USB converter and want it to stay put, do the
> following.
>
> This should work for non-FTDI devices, that have serial numbers, just match
> the VID/PID.
>
> From FTDI Support:
> ===========
> Hello,
>
> What you will need to do is uninstall the driver for the FTDI device. Now
> you will need to create a binary value in the registry by doing the
> following:
>
> Go to START and select RUN
>
> Type regedit in the filed and select ok to get into the registry
>
> Add a REG_BINARY value called IgnoreHWSerNum to the registry and setting it
> to 01.
>
> This value is held in the registry key located at:
> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\UsbFlags\IgnoreHWSerNum
> (Device VID, PID and interface}
>
> For a default FTDI device ID (VID 0x0403, PID 0x6001), add the following
> registry REG_BINARY value set to 01:
>
>
> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\UsbFlags\IgnoreHWSerNum0
> 4036001
>
> Now install the driver again. After this the com port should not increment.
>
> Regards
>
> James Leary
> Support Engineer
> FTDI Ltd
> ===========
>
> If those don't help I can tell you the other darker places of the registry
> to examine and poke at.  I had to make one of my programs "Idiot Proof".
> Customers kept calling me up and asking me "What COM port do I have?".  I
> always wanted to respond "How #$)*#)$ should I know?  It is your computer."
> [It happened a lot, this group of customers were not Computer People.].
> Instead I wrote my programs to always find the correct COM port for the
> customer. I need to turn that into a DLL so other people can use it.
>
> "Programming is a race between making programs Idiot Proof, so that any
> Idiot can use it, and the Universe building bigger and better idiots.  The
> Universe is winning."
>
> --
> http://blog.softwaresafety.net/
> http://www.designer-iii.com/
> http://www.wearablesmartsensors.com/
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