Date: Sun, 1 Oct 2017 13:33:08 +0200 From: Roland Smith <rsmith@xs4all.nl> To: Polytropon <freebsd@edvax.de> Cc: freebsd-questions@freebsd.org Subject: Re: one character lag with pyboard over usb serial Message-ID: <20171001113308.GA82813@slackbox.erewhon.home> In-Reply-To: <20171001122009.3fbfbf95.freebsd@edvax.de> References: <20171001093541.GA81952@slackbox.erewhon.home> <20171001122009.3fbfbf95.freebsd@edvax.de>
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On Sun, Oct 01, 2017 at 12:20:09PM +0200, Polytropon wrote:
> On Sun, 1 Oct 2017 11:35:41 +0200, Roland Smith wrote:
> > I've asked around on the pyboard forum, but nobody there (using Linux or OSX)
> > has seen this problem. It has been suggested that this is a FreeBSD driver
> > problem.
>
> Try to verify with the "cu" program provided natively by the OS.
With ‘cu’, I see the same problem. :-(
> In worst case, monitor the /dev/cuaU-1 device file directly to
> check what is really being sent in either direction. If the
> lag also appears there, it really looks like a driver issue...
What would be the best way to monitor the device directly?
I saw a met/socat invocation like this:
socat /dev/ttyS0,raw,echo=0 SYSTEM:'tee input.txt |\
socat - "PTY,link=/tmp/ttyV0,raw,echo=0,waitslave" | tee output.txt'
> --
> Polytropon
> Magdeburg, Germany
> Happy FreeBSD user since 4.0
> Andra moi ennepe, Mousa, ...
o ánthropos pou palévei me daímones ;-)
--
R.F.Smith http://rsmith.home.xs4all.nl/
[plain text email much appreciated]
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