From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from snark.thyrsus.com (static-71-162-243-5.phlapa.fios.verizon.net [71.162.243.5]) by huchra.bufferbloat.net (Postfix) with ESMTP id CE8CE20024C for ; Mon, 12 Mar 2012 21:54:24 -0700 (PDT) Received: by snark.thyrsus.com (Postfix, from userid 1000) id 1FA2440617; Tue, 13 Mar 2012 00:54:08 -0400 (EDT) Date: Tue, 13 Mar 2012 00:54:08 -0400 From: "Eric S. Raymond" To: Dave Taht Message-ID: <20120313045408.GB19984@thyrsus.com> References: <20120312212608.GC17895@thyrsus.com> <20120312213946.GE17895@thyrsus.com> <20120312224546.GA18404@thyrsus.com> <20120313014341.GC18695@thyrsus.com> <20120313021325.GA19502@thyrsus.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Organization: Eric Conspiracy Secret Labs X-Eric-Conspiracy: There is no conspiracy User-Agent: Mutt/1.5.21 (2010-09-15) 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 Reply-To: esr@thyrsus.com List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Mar 2012 04:54:25 -0000 Dave Taht : > On Mon, Mar 12, 2012 at 7:13 PM, Eric S. Raymond wrote: > > Chris Kuethe : > >> ublox antaris4 (and probably everything newer) has on-die usb and > >> implements the abstract modem class. but 1PPS isn't transmitted over > >> usb. > > > > Annoyingly, it probably could be.  That modem model pretty much has to have > > DCD and RI events. > > Perhaps simply a real usb microcontroller with spi or i2c then driving > usb-2.0 for real... So, how would we get the data off the GPS chip if not through the TTL-level serial interface? Are you proposing building our own serial-to-USB adaptor with a microcontroller? -- Eric S. Raymond