From: Sergei Gavrikov <sergei.gavrikov@gmail.com>
To: grahamlab <graham.labdon@cranems.co.uk>
Cc: ecos-discuss@ecos.sourceware.org
Subject: Re: [ECOS] Serial communications
Date: Wed, 08 Jul 2009 11:52:00 -0000 [thread overview]
Message-ID: <20090708115548.GA12521@sg-ubuntu.local> (raw)
In-Reply-To: <24389918.post@talk.nabble.com>
On Wed, Jul 08, 2009 at 04:41:31AM -0700, grahamlab wrote:
> I run Sun Virtual box on a lap top and have USB to serial converters.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
IMO, it can be an issue: virtual comms + FTDI USB-serial driver. Your
environment is the very virtual thing :-(
> I have tried the serial tests via an environment with 'real' serial ports
> and get the same results.
> It seems to me that the when sending lots of bytes some are missed by the
> serial device driver -I dont know why this happens as Nick can run with no
> problem.
> Do you have any ideas I can try?
Yet another thought. Do you noticed the sporadic resets on the boards?
Does your Laptop's USB port give 500 mA? I thought if your board get a
power supply from USB..., it can be yet another "under-water stone".
If your noticed the resets, try to use self-powered hub
http://en.wikipedia.org/wiki/Usb_hub
But, that is my guess only.
Sergei
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next prev parent reply other threads:[~2009-07-08 11:52 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <26049960.287991246881965794.JavaMail.nabble@isper.nabble.com>
2009-07-06 12:50 ` [ECOS] " Nick Garnett
2009-07-07 7:00 ` [ECOS] " grahamlab
2009-07-07 8:15 ` [ECOS] " John Dallaway
2009-07-07 9:29 ` [ECOS] " grahamlab
2009-07-07 10:23 ` Nick Garnett
2009-07-07 11:04 ` grahamlab
2009-07-07 16:46 ` grahamlab
2009-07-08 9:25 ` Daniel Morris
2009-07-08 10:05 ` grahamlab
2009-07-08 11:01 ` Sergei Gavrikov
2009-07-08 11:41 ` grahamlab
2009-07-08 11:52 ` Sergei Gavrikov [this message]
2009-07-08 12:58 ` grahamlab
2009-07-08 16:27 ` Paul D. DeRocco
2009-07-09 7:47 ` grahamlab
2009-07-09 9:07 ` Nick Garnett
2009-07-10 10:43 ` grahamlab
2009-07-10 12:08 ` Sergei Gavrikov
2009-07-10 12:31 ` Nick Garnett
2009-07-10 12:55 ` grahamlab
2009-07-10 13:17 ` Nick Garnett
2009-07-14 11:06 ` Bessemer
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