From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 15514 invoked by alias); 10 Apr 2007 10:18:25 -0000 Received: (qmail 15505 invoked by uid 22791); 10 Apr 2007 10:18:24 -0000 X-Spam-Status: No, hits=-1.0 required=5.0 tests=AWL,BAYES_50,FORGED_RCVD_HELO X-Spam-Check-By: sourceware.org Received: from anchor-post-32.mail.demon.net (HELO anchor-post-32.mail.demon.net) (194.217.242.90) by sourceware.org (qpsmtpd/0.31) with ESMTP; Tue, 10 Apr 2007 11:18:19 +0100 Received: from calivar.demon.co.uk ([83.104.54.243] helo=xl5.calivar.com) by anchor-post-32.mail.demon.net with esmtp (Exim 4.42) id 1HbDQV-000Mqx-94; Tue, 10 Apr 2007 10:18:16 +0000 Received: from xl5.calivar.com (localhost [127.0.0.1]) by xl5.calivar.com (Postfix) with ESMTP id 4A611138700; Tue, 10 Apr 2007 11:18:15 +0100 (BST) To: "Meiring, H, Mnr " Cc: Subject: Re: Guidance porting AT91sam7 References: <20070409124012.GH19664@lunn.ch> From: Nick Garnett Original-Sender: nickg@ecoscentric.com Date: Tue, 10 Apr 2007 10:18:00 -0000 In-Reply-To: Message-ID: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Mailing-List: contact ecos-devel-help@ecos.sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: ecos-devel-owner@ecos.sourceware.org X-SW-Source: 2007-04/txt/msg00004.txt.bz2 "Meiring, H, Mnr " writes: > The at91sam7a series seems to be an combination of the 7s and 7x > series- basically the 7s with an ebi (my view may change as I look > at more detail). There is however differences with the startup, the > 7a series have a clock manager that handles that, so the platform > setup should change a bit. The interrupts seems to be fairly > similar, but i will first try to get redboot working and then worry > about interrupts. > > I will have a look and shout if I have q's Be warned that there be dragons here. I added SAM7A series support to the eCosCentric source tree a little while ago. It was not nice. The A1 and A2 devices are SAM7's in name only. They differ in lots of ways from the S and X series, and from the earlier AT91 parts; there are almost no functional units that remain identical and some, like the PDC and PIO are very weirdly different. I suspect that they are odd parts that have been shoehorned into the SAM product line as a marketing exercise, there is certainly no technical reason for it. There is further confusion because the SAM7A3 *does* share most functional units with the S and X series. I suspect that the A1 and A2 may be discontinued fairly quickly. So think hard about whether you really want to use the A2. You will be much better off using an S or X series part, or the A3. And, of course, eCosCentric can offer you a working port if you want to save yourself a lot of grief. -- Nick Garnett eCos Kernel Architect eCosCentric Limited http://www.eCosCentric.com/ The eCos experts Barnwell House, Barnwell Drive, Cambridge, UK. Tel: +44 1223 245571 Registered in England and Wales: Reg No 4422071.