From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-vx0-f171.google.com (mail-vx0-f171.google.com [209.85.220.171]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 6D2C92011CD for ; Mon, 12 Mar 2012 20:31:52 -0700 (PDT) Received: by vcbfl15 with SMTP id fl15so255178vcb.16 for ; Mon, 12 Mar 2012 20:31:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type:content-transfer-encoding; bh=sUzS2rz1krJBIzwqCjRfK2jAJpQ3X5plvty7UULT/o4=; b=wRvKUaLKiUfKp5zZ1tBKQFFfZRDFpY6y/7UEtGfCgalYqhW7WT61Ebo7g3fTnz+ZA1 HdiQZ37oR4/y+feCKD4u1QNthJdC3e0sct4exC6QqpM7be4fEx4qGP7XivEUXkivIExZ mNas9kUsVisbTqOUiJZFgvx9R9fj+QrFr2QygPjN2U3tbbsgvsD1CiT2I5IfvU3xw3JG t4wW6vhsS6VsVLs3lSh2CwHRwaizp/wrymjvGcEkrhuwWWSytmOkoNMBlERX2ss6PC9M RglB/XvToQHVjBMV6SC+wiPFhbjXC/cbKLC1r/0nksFudbyKS1JFriEfQEGRrBcfFJPP XS0g== Received: by 10.52.240.144 with SMTP id wa16mr16203926vdc.94.1331609511194; Mon, 12 Mar 2012 20:31:51 -0700 (PDT) MIME-Version: 1.0 Received: by 10.52.115.39 with HTTP; Mon, 12 Mar 2012 20:31:31 -0700 (PDT) In-Reply-To: References: <20120312210345.GC17357@thyrsus.com> <20120312212608.GC17895@thyrsus.com> <20120312213946.GE17895@thyrsus.com> <20120312224546.GA18404@thyrsus.com> <4F5EB328.5050301@c3energy.com> <4F5EB83E.3080602@c3energy.com> From: Chris Kuethe Date: Mon, 12 Mar 2012 20:31:31 -0700 Message-ID: To: Dave Taht Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: thumbgps-devel@lists.bufferbloat.net Subject: Re: [Thumbgps-devel] Build vs. modify vs. what should we be doing anyway? X-BeenThere: thumbgps-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Mar 2012 03:31:52 -0000 On Mon, Mar 12, 2012 at 20:16, Dave Taht 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) >>>>> =A0wrote: >>>>> >>>>>> >>>>>> I think configuration data should be stored in flash. =A0That way ex= tended >>>>>> power off periods are not a problem. >>>>>> >>>>>> My BU-353 has a supercap. =A0That's better than a battery that I mig= ht have >>>>>> to >>>>>> replace, or possibly couldn't replace. =A0But I don't like knowing t= hat, 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 T=E4ht > SKYPE: davetaht > US Tel: 1-239-829-5608 > http://www.bufferbloat.net --=20 GDB has a 'break' feature; why doesn't it have 'fix' too?