From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 25757 invoked by alias); 21 Sep 2007 12:20:05 -0000 Received: (qmail 25733 invoked by uid 22791); 21 Sep 2007 12:20:01 -0000 X-Spam-Check-By: sourceware.org Received: from londo.lunn.ch (HELO londo.lunn.ch) (80.238.139.98) by sourceware.org (qpsmtpd/0.31) with ESMTP; Fri, 21 Sep 2007 12:19:58 +0000 Received: from lunn by londo.lunn.ch with local (Exim 3.36 #1 (Debian)) id 1IYhUB-0007FX-00 for ; Fri, 21 Sep 2007 14:19:55 +0200 Date: Fri, 21 Sep 2007 12:20:00 -0000 From: Andrew Lunn To: eCos discussion Message-ID: <20070921121955.GC17936@lunn.ch> Mail-Followup-To: eCos discussion References: <46F3A1A2.6050606@jifvik.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <46F3A1A2.6050606@jifvik.org> User-Agent: Mutt/1.5.16 (2007-06-11) X-IsSubscribed: yes Mailing-List: contact ecos-discuss-help@ecos.sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: ecos-discuss-owner@ecos.sourceware.org Subject: Re: [ECOS] [Fwd: AT91SAM7SE DMA with external SDRAM] X-SW-Source: 2007-09/txt/msg00118.txt.bz2 > From: jc.caquet@kerlink.fr > To: ecos-discuss-owner@ecos.sourceware.org > Subject: AT91SAM7SE DMA with external SDRAM > Date: Fri, 21 Sep 2007 10:08:45 +0200 > X-Spam-Status: No, score=2.9 required=5.0 tests=AWL,BAYES_60, > MSGID_FROM_MTA_ID,NO_REAL_NAME autolearn=no version=3.0.4 > > Dear all, > we are facing a pb when sending data over serial link on AT91SAM7SE-EK > board. We use external SDRAM connected on EBI, this SDRAM is OK as we made > some intensive read/write tests over the whole memory. This might not be conclusive. The DMA engine could be doing a different type of memory access as to normal reads/writes. > Does anybody know if there are some restrictions/bugs when using DMA with > external memory connected on EBI ? You should probably be asking Atmel.... Andrew -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss