From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 28028 invoked by alias); 21 Sep 2007 12:23:23 -0000 Received: (qmail 28020 invoked by uid 22791); 21 Sep 2007 12:23:22 -0000 X-Spam-Check-By: sourceware.org Received: from scanner-relay-corvus2.pulsation.fr (HELO scanner-relay-corvus2.pulsation.fr) (80.74.64.70) by sourceware.org (qpsmtpd/0.31) with SMTP; Fri, 21 Sep 2007 12:23:13 +0000 Received: (qmail 15212 invoked from network); 21 Sep 2007 12:23:10 -0000 Received: from relayauth-corvus2.pulsation.fr (80.74.64.67) by scanner-relay-corvus2.pulsation.fr with SMTP; 21 Sep 2007 12:23:10 -0000 Received: (qmail 15200 invoked from network); 21 Sep 2007 12:23:09 -0000 Received: from unknown (HELO KLKJCC) (jc.caquet@kerlink.fr@80.125.252.188) by relayauth-corvus2.pulsation.fr with SMTP; 21 Sep 2007 12:23:09 -0000 From: To: "'Andrew Lunn'" , "'eCos discussion'" Date: Fri, 21 Sep 2007 12:23:00 -0000 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Office Outlook, Build 11.0.5510 In-Reply-To: <20070921121955.GC17936@lunn.ch> 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/msg00119.txt.bz2 Message-ID: <20070921122300.WBWYEssvqZYDkN7tb-Jt0Z6ayB8fa7ktGW0PGNJmtIE@z> -----Message d'origine----- De=A0: ecos-discuss-owner@ecos.sourceware.org [mailto:ecos-discuss-owner@ecos.sourceware.org] De la part de Andrew Lunn Envoy=E9=A0: vendredi 21 septembre 2007 13:20 =C0=A0: eCos discussion Objet=A0: Re: [ECOS] [Fwd: AT91SAM7SE DMA with external SDRAM] > 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=3D2.9 required=3D5.0 tests=3DAWL,BAYES_60, > MSGID_FROM_MTA_ID,NO_REAL_NAME autolearn=3Dno version=3D3.0.4 >=20 > 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 We just got an answer from ATMEL, this pb has already been reported, they 're looking for a workaround. JC --=20 Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss