From owner-freebsd-arm@freebsd.org Thu Oct 25 15:28:48 2018 Return-Path: Delivered-To: freebsd-arm@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 8ECC1107B2B5 for ; Thu, 25 Oct 2018 15:28:48 +0000 (UTC) (envelope-from sparvu@kronometrix.org) Received: from mail.kronometrix.org (mail.kronometrix.org [95.85.46.90]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail.kronometrix.org", Issuer "mail.kronometrix.org" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 1A5708957F for ; Thu, 25 Oct 2018 15:28:47 +0000 (UTC) (envelope-from sparvu@kronometrix.org) Received: from [192.168.1.101] (82-203-189-118.bb.dnainternet.fi [82.203.189.118]) (authenticated bits=0) by mail.kronometrix.org (8.15.2/8.15.2) with ESMTPSA id w9PFSjt5012795 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Thu, 25 Oct 2018 15:28:46 GMT (envelope-from sparvu@kronometrix.org) X-Authentication-Warning: mail.kronometrix.org: Host 82-203-189-118.bb.dnainternet.fi [82.203.189.118] claimed to be [192.168.1.101] From: Stefan Parvu Mime-Version: 1.0 (Mac OS X Mail 12.0 \(3445.100.39\)) Subject: Re: boot loader serial console speed to 9600 Date: Thu, 25 Oct 2018 18:28:39 +0300 References: <1540480146.22340.79.camel@freebsd.org> To: freebsd-arm@freebsd.org In-Reply-To: <1540480146.22340.79.camel@freebsd.org> Message-Id: <02DDF4DE-2735-4B81-9BB7-E07F60DCB44B@kronometrix.org> X-Mailer: Apple Mail (2.3445.100.39) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Oct 2018 15:28:48 -0000 > The ability to change serial console speed from loader(8) only works > with x86 BIOS calls (and maybe UEFI, not sure). In general, when uboot > is involved, loader will use whatever serial speed was set up by = uboot. ok, right. Thats exactly probable what we are seeing. We are using a RBPI3B+ with Strato Base [1] which connects to a Vaisala logger [2] which cannot speak 115200 due its restrictions to operate on solar = panels etc. So we are experimenting with FreeBSD 12 on this setup to fetch data from the Vaisala logger.=20 > Why do you want to set the console to such a slow speed? It actually > pisses me off that the standard is as slow as 115200 in the 21st > century; modern uart chips have no problem running at speeds in the 1- > 12mbps range. Because I need to connect the Vaisala logger (which cannot speak 115200)=20= to the RBPI3B+ to read data. Using a FDTI cable is simple and probable = will work for us. Is there anything else we could try to configure ? You mean we could = configure the uboot module ? How ? Any pointers ? Thanks a lot for tips, Stefan [1] https://www.sferalabs.cc/strato-pi/#models = [2] = https://www.vaisala.com/sites/default/files/documents/QML201C-Datasheet-B2= 10718EN.pdf = =20