From: Jim Thompson <jim@netgate.com>
To: Gary E. Miller <gem@rellim.com>
Cc: "thumbgps-devel@lists.bufferbloat.net"
<thumbgps-devel@lists.bufferbloat.net>
Subject: Re: [Thumbgps-devel] Navisys GR-601W
Date: Mon, 24 Sep 2012 20:49:42 -0500 [thread overview]
Message-ID: <5CE648CE-F90F-423A-BFA8-7760E65D7296@netgate.com> (raw)
In-Reply-To: <20120924153222.25f3f04d.gem@rellim.com>
On Sep 24, 2012, at 5:32 PM, Gary E. Miller <gem@rellim.com> wrote:
> Yo Jim!
>
> On Sun, 23 Sep 2012 00:07:43 -0500
> Jim Thompson <jim@netgate.com> wrote:
>
>> They don't work that we'll on FreeBSD.
>
> Really? First I've heard of it. What's the issue?
In a word: jitter
The PPS API described in RFC2783 isn't supported on USB serial ports on FreeBSD 8.3 or 9.0
Note that the PPS API *is* supported:
http://fxr.watson.org/fxr/source/sys/timepps.h?v=FREEBSD9
http://fxr.watson.org/fxr/source/kern/kern_ntptime.c?v=FREEBSD9
But that timepps.h is only included via uart/uart_bus
http://fxr.watson.org/fxr/source/dev/uart/uart_bus.h?v=FREEBSD9
Compare:
http://fxr.watson.org/fxr/source/dev/uart/uart_core.c?v=FREEBSD9
and
http://fxr.watson.org/fxr/source/dev/sio/sio.c?v=FREEBSD9
and
http://fxr.watson.org/fxr/source/pc98/cbus/sio.c?v=FREEBSD9
to anything found in
http://fxr.watson.org/fxr/source/dev/usb/serial/?v=FREEBSD9
next prev parent reply other threads:[~2012-09-25 1:49 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-23 3:22 Joe Williams
2012-09-23 4:33 ` Eric S. Raymond
2012-09-23 5:07 ` Jim Thompson
2012-09-24 22:32 ` Gary E. Miller
2012-09-25 1:49 ` Jim Thompson [this message]
2012-09-25 1:58 ` Gary E. Miller
2012-09-25 2:04 ` Jim Thompson
2012-09-25 2:20 ` Gary E. Miller
2012-09-26 19:52 ` Joe Williams
2012-09-26 20:00 ` Gary E. Miller
2012-09-26 20:05 ` Dave Taht
2012-09-26 20:05 ` Joe Williams
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