[Thumbgps-devel] Build vs. modify vs. what should we be doing anyway?

[Dave Taht]

On Mon, Mar 12, 2012 at 8:06 PM, Chris Kuethe <chris.kuethe at gmail.com> wrote:
> On Mon, Mar 12, 2012 at 20:04, Dave Taht <dave.taht at gmail.com> wrote:
>> On Mon, Mar 12, 2012 at 8:00 PM, Ron Frazier (NTP)

>> hmm.. Anyone know anything about this puppy?
>>
>> http://www.u-blox.com/en/gps-chips/timing-a-raw-data-chip/ubx-g6010-st-tm.html
>
> Well, if it's anything like other ublox receivers it'll be pretty good
> for timing.
>
> I'm glad we still have docs for earlier devices: "The UBX-G6010-ST
> Data Sheet, Hardware Integration Manual, and Receiver Description
> Including Protocol Specification require an NDA and can be obtained by
> contacting u-blox"

I've read up a lot of this chips features, it has 12Mbit usb onboard,
also spi, this was some info on the timing stuff....

https://www.u-blox.com/images/downloads/Product_Docs/Timing_AppNote_%28GPS.G6-X-11007%29.pdf

wish I knew how much it was...

not clear to me just how much usb there is to the usb - is additional
glue/firmware/cpu neeeded?

>>> On 3/12/2012 10:42 PM, Chris Kuethe wrote:
>>>>
>>>> On Mon, Mar 12, 2012 at 19:38, Ron Frazier (NTP)
>>>> <timekeepingntplist at c3energy.com>  wrote:
>>>>
>>>>>
>>>>> I think configuration data should be stored in flash.  That way extended
>>>>> power off periods are not a problem.
>>>>>
>>>>> My BU-353 has a supercap.  That's better than a battery that I might have
>>>>> to
>>>>> replace, or possibly couldn't replace.  But I don't like knowing that, if
>>>>> I
>>>>> unplug it for a week, I'm going to have to reprogram it.
>>>>>
>>>>
>>>> See, I wouldn't mind losing the config after a few hours without
>>>> power. At least that way you have a way to reset the serial port when
>>>> it gets hopelessly confused - a situation known to gpsd as the
>>>> bluetooth problem.

I like the idea of onboard flash, which is why I went looking for the
atmel. Although sparkfun lists it as obsolete, I don't see an obvious
replacement from atmel....

And a supercap to stay alive as long as possible.

I think I've done enough damage to the potential pricepoint for one day...



-- 
Dave Täht
SKYPE: davetaht
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