[Thumbgps-devel] YEA! My Sure Electronics GPS just arrived.

[tz]

The skytraq EVBs (direct from skytraq) all use the SiLabs chip - you cannot
plug more than one in at a time under XP.  It won't enumerate the second as
a com port and it confuses everything.
 On Mar 23, 2012 11:25 PM, "Ron Frazier (NTP)" <
timekeepingntplist at c3energy.com> wrote:

> 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
>
>
>
> --
>
> (PS - If you email me and don't get a quick response, don't be concerned.
> I get about 300 emails per day from alternate energy mailing lists and
> such.  I don't always see new messages very quickly.  If you need a
> reply and have not heard from me in 1 - 2 weeks, send your message again.)
>
> Ron Frazier
> timekeepingdude AT c3energy.com
>
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