From: Ned Forrester <nforrester-/d+BM93fTQY@public.gmane.org>
To: David Brownell <david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
Cc: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
magene-5892unH0nlnYtjvyW6yDsg@public.gmane.org
Subject: Re: SPI or CSPI transfers using DMA
Date: Thu, 20 Nov 2008 18:07:07 -0500 [thread overview]
Message-ID: <4925ED9B.305@whoi.edu> (raw)
In-Reply-To: <200811201339.28627.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
David Brownell wrote:
> On Thursday 30 October 2008, magene-5892unH0nlnYtjvyW6yDsg@public.gmane.org wrote:
>> I've been developing an application on an Eurotech (formerly
>> Applied Data Systems) Bitsy Xb PXA270 board
>> I'd like to use DMA put the DMA engine on the PXA270 has
>> a pretty steep learning curve. Does anyone have a code example
>> that could help jumpstart me?
>
> Our resident expert from Woods Hole has a similar data
> streaming application, using PXA and DMA. Maybe he can
> share a few words of wisdom ...
I already did, on 10/31/08. I have not heard back. While I referenced
pxa2xx_spi.c as a useful example of setting up DMA, Gene should note
that we recently discovered that the RX and TX DMA memory mappings are
performed in the wrong order in that code.
Interesting... I did not note before that Gene is at MBARI, one of our
sister oceanographic research facilities. :-)
--
Ned Forrester nforrester-/d+BM93fTQY@public.gmane.org
Oceanographic Systems Lab 508-289-2226
Applied Ocean Physics and Engineering Dept.
Woods Hole Oceanographic Institution Woods Hole, MA 02543, USA
http://www.whoi.edu/sbl/liteSite.do?litesiteid=7212
http://www.whoi.edu/hpb/Site.do?id=1532
http://www.whoi.edu/page.do?pid=10079
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next prev parent reply other threads:[~2008-11-20 23:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-31 5:46 SPI or CSPI transfers using DMA magene-5892unH0nlnYtjvyW6yDsg
[not found] ` <10811398.477881225431989704.JavaMail.nabble-eSX/vLDKhQvUl7QJpGZvuQ@public.gmane.org>
2008-10-31 12:28 ` Ned Forrester
2008-11-20 21:39 ` David Brownell
[not found] ` <200811201339.28627.david-b-yBeKhBN/0LDR7s880joybQ@public.gmane.org>
2008-11-20 23:07 ` Ned Forrester [this message]
[not found] ` <4925ED9B.305-/d+BM93fTQY@public.gmane.org>
2008-11-20 23:46 ` Massion, Gene
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