From owner-freebsd-arm@freebsd.org Sat May 30 02:22:01 2020 Return-Path: Delivered-To: freebsd-arm@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 78F462F7688 for ; Sat, 30 May 2020 02:22:01 +0000 (UTC) (envelope-from freebsd@cyclaero.com) Received: from mo4-p00-ob.smtp.rzone.de (mo4-p00-ob.smtp.rzone.de [81.169.146.218]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "*.smtp.rzone.de", Issuer "TeleSec ServerPass Class 2 CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49YlZ00RX5z3dCL for ; Sat, 30 May 2020 02:21:59 +0000 (UTC) (envelope-from freebsd@cyclaero.com) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1590805317; s=strato-dkim-0002; d=cyclaero.com; h=To:Date:Message-Id:Subject:From:X-RZG-CLASS-ID:X-RZG-AUTH:From: Subject:Sender; bh=RZsRR7KPII1zAbB7K1dKcJd23XZw+bmhRKAFncdWEPw=; b=jiXURkfV/ZLDXn5xTVPTswiQK65ZeQnv7XFJ/vMGbDctg8EJ/1EwT/aHXOksDSjzWw /YRREBlj9YrPJhCqcp2C9ulz32khYQCW1mvz5FEpZYusvqoLUZJxlMmwJZbF9kxOYehq /3ROG3FaUpp1nu4eL9YyHSCASgdurBF4Msjm5oR5Ek34NHjCcvHkSy5T0XzZzsvV+LWx /8r/yiDMg82eJrAlp94aY0AHqVwvMWP/yWK4b97bdzMch/MrJkDOS2qBp/GgG2+obI89 1t2yqN1RpWSTHv1q1y+VEUjxUIy1IEeY3W7SNDeSDtE4CGbjkmWUFPnWkVbOkYS9RCyi tP9A== X-RZG-AUTH: ":O2kGeEG7b/pS1F2rRHW2isrKl4DV03XBEi+I6ZuztdvN9wS3wFGySS4Lw+ldTBio0dVbInGjc9PbZFAm0A==" X-RZG-CLASS-ID: mo00 Received: from mail.obsigna.com by smtp.strato.de (RZmta 46.9.0 DYNA|AUTH) with ESMTPSA id I06cf5w4U2Lu7xX (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate) for ; Sat, 30 May 2020 04:21:56 +0200 (CEST) Received: from rolf-mini.obsigna.com (rolf-mini.obsigna.com [192.168.222.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.obsigna.com (Postfix) with ESMTPSA id 3F6BC1350F91D for ; Fri, 29 May 2020 23:21:52 -0300 (-03) From: "Dr. Rolf Jansen" Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Subject: BeagleBone AI Message-Id: Date: Fri, 29 May 2020 23:21:50 -0300 To: freebsd-arm@freebsd.org X-Mailer: Apple Mail (2.3445.104.11) X-Rspamd-Queue-Id: 49YlZ00RX5z3dCL X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; dkim=pass header.d=cyclaero.com header.s=strato-dkim-0002 header.b=jiXURkfV; dmarc=none; spf=pass (mx1.freebsd.org: domain of freebsd@cyclaero.com designates 81.169.146.218 as permitted sender) smtp.mailfrom=freebsd@cyclaero.com X-Spamd-Result: default: False [-0.88 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[cyclaero.com:s=strato-dkim-0002]; RWL_MAILSPIKE_POSSIBLE(0.00)[81.169.146.218:from]; FROM_HAS_DN(0.00)[]; MV_CASE(0.50)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; TO_DN_NONE(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-arm@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-1.01)[-1.011]; RCVD_COUNT_THREE(0.00)[3]; DMARC_NA(0.00)[cyclaero.com]; R_SPF_ALLOW(-0.20)[+ip4:81.169.146.128/25]; DKIM_TRACE(0.00)[cyclaero.com:+]; FROM_NAME_HAS_TITLE(1.00)[dr]; NEURAL_HAM_MEDIUM(-0.98)[-0.979]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; NEURAL_SPAM_SHORT(0.21)[0.206]; ASN(0.00)[asn:6724, ipnet:81.169.144.0/22, country:DE]; RCVD_TLS_ALL(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_IN_DNSWL_LOW(-0.10)[81.169.146.218:from] Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.33 X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 30 May 2020 02:22:01 -0000 We are starting a new project of industrial device controllers. We want = to utilize ARM-SBCs as unit controllers (and here a unit is one = industrial device), and we need to attach at least 24 ADCs, 8 DACs and = 16 DIOs to each unit controller (UC). Many unit controllers (eventually = tenths to hundreds) would then communicate by a custom protocol over = ethernet with a command and control server. The UCs and the C&C server = would be operated by FreeBSD. Direct interoperability of the UCs with = 3rd party IT systems is not a concern, integration needs to be done via = the C&C server. =20 Since the sample/update rate requirements are quite low, we are going = the I=C2=B2C path, and initial testing has been done using the = BeagleBone Black. It got 2 separate I=C2=B2C 400 kbit/s busses which = helps already, avoiding I=C2=B2C address conflicts. Yet, the 8 port I=C2=B2= C switch TCA9548A is working very well, and we are now sure to be able = to attach enough ADCs, DACs and DIOs to each unit controller. Although the initial viability tests were done with a BeagleBone Black = running FreeBSD 13-CURRENT, we could start with another more modern SBC. First Question: What modern SBC with more than 1 I=C2=B2C bus and which can run FreeBSD = 13++ would you suggest? Now recently, I found the BeagleBone AI site https://beagleboard.org/ai/ = . This one got also 2 I=C2=B2C busses, and = physically, with respect to a housing, it could be a 1:1 replacement for = a BBB. It seems, this one is still too new for FreeBSD. I am very fond = of the BB concept - for me it is much more appealing for industrial = embedded applications than for example any RPI. However, the BBB came to = age, and I would start a new project with it only, if there would be a = reasonable chance for an upgrade path. Two more Questions: Is it reasonable to assume that FreeBSD would run on a BBAI in the = future, let=E2=80=99s say in 2 to 3 years? Perhaps I could help porting FreeBSD to a BBAI. What would be the = general steps? Many thanks in advance for any suggestions, advices and clarifications. Best regards Rolf=