[ntp:questions] YEA! My Sure Electronics GPS just arrived.

DaveB g8kbv at uko2.co.uk
Mon Mar 26 09:00:03 UTC 2012

In article <4F6D3E94.4080902 at c3energy.com>, 
timekeepingntplist at c3energy.com says...
> Hi all,
> I just discovered an interesting thing about the Sure board's serial - 
> USB converter.  I went ahead and installed the driver.  With this serial 
> - USB converter, which is a Silicon Labs CP210x chipset, no matter which 
> USB port I plug it into, it becomes COM6, which was the next one 
> available.  With the Prolific based devices, including the TU-S9 and the 
> BU-353, each subsequent USB port I plug into becomes a new com port, so 
> those devices became COM3, COM4, and COM5 respectively as I plugged them 
> into succeeding USB ports.  I can see pros and cons either way.
> With the Prolific way, if I move the device to a different port, I have 
> to have a different setup in the ntp.conf file, although you could 
> probably have multiple setups, and if nothing is attached to a given 
> port, then it gets ignored.
> With the Silicon Labs way, I only have to have one set of configuration 
> options in ntp.conf.  However, what happens if I plug in another device 
> with the same chipset?  I'm assuming the next one will become COM7.  
> But, now, if I unplug both and plug them back into the same ports, but 
> in the opposite sequence, I'll bet the original 1st device will now be 
> COM7 and the original 2nd device will be COM6.  I can see how this would 
> cause some problems.
> I have not tested yet whether this board's USB port has a built in 
> driver in Linux.
> Sincerely,
> Ron

Ron.  To "fix" wandering com ports in Windows, take a look at:-

(or:- http://preview.tinyurl.com/8592zvp  Goes to the same site above.)

Hope that helps a bit.  Maybe there are similar tweaks in Linux?

Dave B.

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