From: Chris Kuethe <chris.kuethe@gmail.com>
To: Dave Taht <dave.taht@gmail.com>
Cc: thumbgps-devel@lists.bufferbloat.net
Subject: Re: [Thumbgps-devel] Build vs. modify vs. what should we be doing anyway?
Date: Mon, 12 Mar 2012 20:31:31 -0700 [thread overview]
Message-ID: <CAGHP0pLo2swvB4f2Hbbo5+VdCEtaOUYGx4-BH+KY75UQMdouCg@mail.gmail.com> (raw)
In-Reply-To: <CAA93jw5bw_v0TqzvotTShTZnkiXc7TwmOfyDX697E-3cBdgS3A@mail.gmail.com>
On Mon, Mar 12, 2012 at 20:16, Dave Taht <dave.taht@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@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?
next prev parent reply other threads:[~2012-03-13 3:31 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-10 18:02 Patrick Maupin
2012-03-12 21:03 ` Eric S. Raymond
2012-03-12 21:18 ` tz
2012-03-12 21:26 ` Eric S. Raymond
2012-03-12 21:28 ` Patrick Maupin
2012-03-12 21:39 ` Eric S. Raymond
2012-03-12 22:10 ` Patrick Maupin
2012-03-12 22:23 ` tz
2012-03-12 22:33 ` Patrick Maupin
2012-03-13 2:29 ` Ron Frazier (NTP)
2012-03-13 2:39 ` Chris Kuethe
2012-03-12 22:45 ` Eric S. Raymond
2012-03-12 23:01 ` Dave Taht
2012-03-13 1:43 ` Eric S. Raymond
2012-03-13 2:04 ` Chris Kuethe
2012-03-13 2:13 ` Eric S. Raymond
2012-03-13 2:40 ` Dave Taht
2012-03-13 2:53 ` Chris Kuethe
2012-03-13 4:54 ` Eric S. Raymond
2012-03-13 13:23 ` Dave Taht
2012-03-13 14:35 ` tz
2012-03-13 16:04 ` Eric S. Raymond
2012-03-13 16:22 ` tz
2012-03-13 2:38 ` Ron Frazier (NTP)
2012-03-13 2:42 ` Chris Kuethe
2012-03-13 3:00 ` Ron Frazier (NTP)
2012-03-13 3:04 ` Dave Taht
2012-03-13 3:06 ` Chris Kuethe
2012-03-13 3:16 ` Dave Taht
2012-03-13 3:31 ` Chris Kuethe [this message]
2012-03-13 4:49 ` Dave Taht
2012-03-13 4:55 ` Eric S. Raymond
2012-03-13 4:16 ` Eric S. Raymond
2012-03-12 21:40 ` tz
2012-03-12 21:27 ` Patrick Maupin
2012-03-12 21:22 ` Patrick Maupin
2012-03-12 21:37 ` Eric S. Raymond
2012-03-12 21:45 ` Patrick Maupin
2012-03-12 22:02 ` Eric S. Raymond
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