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

[Chris Kuethe]

On Mon, Mar 12, 2012 at 20:16, Dave Taht <dave.taht at gmail.com> wrote:
> wish I knew how much it was...

Look at the cost of the timing eval kit. In large quantities you could
probably get oem modules for about 1/10th of that.

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

My AEK-4T has a usb port on board. Done.

The hardware integration manual for the ublox5 says you need a few
resistors, a couple of decoupling caps, a couple of protection diodes
and a 3.3v power supply.

Both of them probably have all the code in the firmware already. Never
noticed any ill effect on timing quality even with verbose usb output.

>>>> 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
> US Tel: 1-239-829-5608
> http://www.bufferbloat.net



-- 
GDB has a 'break' feature; why doesn't it have 'fix' too?