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From: magene-5892unH0nlnYtjvyW6yDsg@public.gmane.org
To: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: SPI or CSPI transfers using DMA
Date: Thu, 30 Oct 2008 22:46:29 -0700	[thread overview]
Message-ID: <10811398.477881225431989704.JavaMail.nabble@isper.nabble.com> (raw)

I've been developing an application on an Eurotech (formerly Applied Data Systems) Bitsy Xb PXA270 board that reads data from and ADC at about 50 kSamples/sec.  It works fine when I poll the SPI port for data but I get some drop outs in the data, probably when the OS is off doing something else.  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?  I may be upgrading to a i.MX31 based board and similar examples with that device's CSPI and DMA would also be helpful.

Thanks - Gene 

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             reply	other threads:[~2008-10-31  5:46 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-31  5:46 magene-5892unH0nlnYtjvyW6yDsg [this message]
     [not found] ` <10811398.477881225431989704.JavaMail.nabble-eSX/vLDKhQvUl7QJpGZvuQ@public.gmane.org>
2008-10-31 12:28   ` SPI or CSPI transfers using DMA 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
     [not found]         ` <4925ED9B.305-/d+BM93fTQY@public.gmane.org>
2008-11-20 23:46           ` Massion, Gene

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