From: jassi brar <jassisinghbrar@gmail.com>
To: Ben Gamari <bgamari.foss@gmail.com>
Cc: beagleboard@googlegroups.com,
spi-devel-general@lists.sourceforge.net,
linux-omap@vger.kernel.org
Subject: Re: [spi-devel-general] SPI troubles
Date: Mon, 15 Mar 2010 11:55:56 +0900 [thread overview]
Message-ID: <1b68c6791003141955q41ad6528y25faa5597dcbf9b3@mail.gmail.com> (raw)
In-Reply-To: <4b9d9f11.9a15f10a.3902.6dc3@mx.google.com>
On Mon, Mar 15, 2010 at 11:44 AM, Ben Gamari <bgamari.foss@gmail.com> wrote:
> While I can reliably see a signal sent on the SIMO line, I have not once been
> able to recieve anything but zeros in return. I have verified that the the SOMI
> ball works as expected as a GPIO input.
a) You might as well want to verify your SPIDEV setup by using the
same pins in GPIO mode
and controlling them by gpio-bitbanging i/f ... first on both boards
and then on either, to more
accurately diagnose the problem).
b) Maybe line-strength settings should be checked, if available, of
the relevant pins?
hth
next prev parent reply other threads:[~2010-03-15 2:55 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-15 2:44 SPI troubles Ben Gamari
2010-03-15 2:55 ` jassi brar [this message]
2010-03-15 15:38 ` [spi-devel-general] " Ben Gamari
2010-03-15 12:25 ` Philip Balister
2010-03-15 16:01 ` Ben Gamari
[not found] ` <4b9d9f11.9a15f10a.3902.6dc3-ATjtLOhZ0NVl57MIdRCFDg@public.gmane.org>
2010-03-15 14:38 ` Ned Forrester
2010-03-15 15:57 ` [spi-devel-general] " Ben Gamari
2010-03-15 20:57 ` Ned Forrester
2010-03-16 1:06 ` Ben Gamari
2010-03-16 2:24 ` Ned Forrester
2010-03-15 17:04 ` Tony Lindgren
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