From: Patrick Maupin <pmaupin@gmail.com>
To: esr@thyrsus.com
Cc: thumbgps-devel@lists.bufferbloat.net
Subject: Re: [Thumbgps-devel] USB handshake signals and Linux
Date: Wed, 14 Mar 2012 22:33:36 -0500 [thread overview]
Message-ID: <CAPz3yKe3g1LsA788KxDRiuuqfORYndi7+9Gn9CNgBYZkBto0qQ@mail.gmail.com> (raw)
In-Reply-To: <20120314184258.GA30210@thyrsus.com>
On Wed, Mar 14, 2012 at 1:42 PM, Eric S. Raymond <esr@thyrsus.com> wrote:
> I found a couple of hits on the search "PL2303 latency timer" that
> implies it has one too. But I doubt the value of the latency timer
> will be relevant for handshake-line notifications; see below.
The latency timer on the FTDI parts can be dropped to a millisecond.
If we find a USB dongle that has a USB converter with similar
capabilities and a GPS chipset that has rock-solid first-character
timing, we might avoid needing the RS232 handshake altogether.
(We might need to drop the baud rate to avoid losing data, but that's
not a huge deal.)
next prev parent reply other threads:[~2012-03-15 3:33 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-14 10:49 Eric S. Raymond
2012-03-14 12:55 ` Ron Frazier (NTP)
2012-03-14 12:58 ` Ron Frazier (NTP)
2012-03-14 18:13 ` Patrick Maupin
2012-03-14 18:42 ` Eric S. Raymond
2012-03-14 18:57 ` Dave Taht
2012-03-14 20:09 ` Patrick Maupin
2012-03-15 3:33 ` Patrick Maupin [this message]
2012-03-15 4:23 ` Eric S. Raymond
[not found] <CAFv7OigTLhw24i+jRshv0YgLogyx_GEREAOkP7tieeH1Nr5WzA@mail.gmail.com>
2012-03-15 14:37 ` tz
2012-03-15 14:52 ` Ron Frazier (NTP)
2012-03-15 17:57 ` Eric S. Raymond
2012-03-15 18:31 ` Eric S. Raymond
2012-03-15 18:54 ` Patrick Maupin
2012-03-15 19:36 ` Eric S. Raymond
2012-03-15 19:55 ` Patrick Maupin
2012-03-15 19:14 ` tz
2012-03-15 19:50 ` Eric S. Raymond
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