From owner-freebsd-embedded@FreeBSD.ORG Wed Jan 21 17:57:14 2015 Return-Path: Delivered-To: freebsd-embedded@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 4694C2DE for ; Wed, 21 Jan 2015 17:57:14 +0000 (UTC) Received: from mail-ob0-x232.google.com (mail-ob0-x232.google.com [IPv6:2607:f8b0:4003:c01::232]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 0B3ED620 for ; Wed, 21 Jan 2015 17:57:14 +0000 (UTC) Received: by mail-ob0-f178.google.com with SMTP id nt9so10041118obb.9 for ; Wed, 21 Jan 2015 09:57:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=EDDt21jsT4y3qT12kdvkOqTVRbjVkjZWNMxbxTTWgUQ=; b=Hwb4KV/bn5MyHu6SVpGuXAdpCjavPTrooqMWjfo8n/m8avO4HsB13fUA1EHC9D0tkS yJYLyBzfjNTXSDX7iGdT2Q/FhUcuuFuDvkurx0tddxcgkbVXwDmb1wnUkbhz2Qrp3p83 BFpayI1tISvwEwGFK6UVA8zk+8QQaxYHJXVIdi/UQbe3ZeMBbLQjMTDZ/p008Lp+Gx5P ayxTFcd0nL+bxv/wekGIW5+L6lfLBcXXBPgeaHASYn3zdA3oeLdqrRc0+CBJxwp+j4h2 wEaKbs9eFnLG82R0GgI53+z+pkMLILaB5XRvO96HAIy+29JExjXi6BkKAxlPnZH6nuzB w5Eg== MIME-Version: 1.0 X-Received: by 10.60.63.244 with SMTP id j20mr25725309oes.5.1421863033296; Wed, 21 Jan 2015 09:57:13 -0800 (PST) Received: by 10.76.167.34 with HTTP; Wed, 21 Jan 2015 09:57:13 -0800 (PST) Date: Wed, 21 Jan 2015 09:57:13 -0800 Message-ID: Subject: RBPi Doesn't Boot With GPS GPIO Board Attached From: Reza Nikoopour To: freebsd-embedded@freebsd.org Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1 X-BeenThere: freebsd-embedded@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Dedicated and Embedded Systems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Jan 2015 17:57:14 -0000 Hello, I'm currently building an NTP server using the following set up: Raspberry Pi B+ < http://www.amazon.com/gp/product/B00LPESRUK/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 > Raspberry PI GPS Add-on < http://imall.iteadstudio.com/raspberry-pi-gps-add-on.html > FreeBSD 10.1 built with CrochetBSD I was able to build an img with Crochet and get the Pi to boot into a shell. However, whenever I booting the Pi with the GPS board attached it will not boot. When I plug in the GPS Add-on into the GPIO connector, my Pi fails to boot before starting the kernel. It boots to the point where it says "Press enter to prevent auto boot" and then the letter 'L' shows up and starts erasing text from the screen. I was initially using a 1.5A power supply. It was suggested to me to try using a stronger power supply so I tried a 2.1A power supply, but that didn't work either. Using the 2.1A power supply resulted in the same boot problem described above. Next I tried using Raspbian to boot the Pi, but a similar problem occurred. The Pi boots without the GPS board attached. When the GPS board is attached, it boots kernel and when the screen to start Raspbian Software Configuration then the following message prints to the screen indefinitely: SysRq : HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystem(j) sak(k) show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) show-blocked-test(w) Could I get some guidance with fixing this problem? Thanks! Reza From owner-freebsd-embedded@FreeBSD.ORG Wed Jan 21 19:16:28 2015 Return-Path: Delivered-To: freebsd-embedded@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C89172DD for ; Wed, 21 Jan 2015 19:16:28 +0000 (UTC) Received: from mail-ig0-x234.google.com (mail-ig0-x234.google.com [IPv6:2607:f8b0:4001:c05::234]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 8F216F4B for ; Wed, 21 Jan 2015 19:16:28 +0000 (UTC) Received: by mail-ig0-f180.google.com with SMTP id b16so16657306igk.1 for ; Wed, 21 Jan 2015 11:16:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=Mtl+rbJGz+gPEnpcEeNqn3M+lm38pa+IpBbyIV7QIrw=; b=bNtuG3G9Qtg4GwPWzRUrVskJRSIH8W7RXJaI1JzRdbuS849YxtUXzji7Im7GOSrjfE ESK/oiurwrQDLVapYuiYQO+fy1YbjJslq2OiVlg3iw28mtolZYEws1dab/rCXLIZ5WRM TY1yCqBtRtsbXD5XXrT2vAGD//U1QvonmPuVurhwj7JqjKNhsR2b60kPkreaia58peGW pZnPjIUbmUo6YSTXr/Pgcr8Xtvm3Jn323/J5MFbW+qhYTuWHGREI88tXNerEhLj4QFci r9EXXoI/EQsBxtgOCVJX8wfkpQM1+87MJSuHfGtNEGTqT7ofA3wS/wT/RI1WzB2/D/ei 9YNA== MIME-Version: 1.0 X-Received: by 10.42.54.5 with SMTP id p5mr42588428icg.37.1421867788062; Wed, 21 Jan 2015 11:16:28 -0800 (PST) Sender: adrian.chadd@gmail.com Received: by 10.36.78.14 with HTTP; Wed, 21 Jan 2015 11:16:28 -0800 (PST) In-Reply-To: References: Date: Wed, 21 Jan 2015 11:16:28 -0800 X-Google-Sender-Auth: m05At-RdrTbP1TD-FM76e8SkN8U Message-ID: Subject: Re: RBPi Doesn't Boot With GPS GPIO Board Attached From: Adrian Chadd To: Reza Nikoopour Content-Type: text/plain; charset=UTF-8 Cc: "freebsd-embedded@freebsd.org" X-BeenThere: freebsd-embedded@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Dedicated and Embedded Systems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Jan 2015 19:16:29 -0000 Hi, Does the GPS add-on speak to the raspberry PI serial console? If so, it's likely outputting a whole lot of GPS data via serial, and the boot loaders for both operating systems are interpreting that as valid input. -a On 21 January 2015 at 09:57, Reza Nikoopour wrote: > Hello, > > I'm currently building an NTP server using the following set up: > > Raspberry Pi B+ < > http://www.amazon.com/gp/product/B00LPESRUK/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 >> > Raspberry PI GPS Add-on < > http://imall.iteadstudio.com/raspberry-pi-gps-add-on.html > > FreeBSD 10.1 built with CrochetBSD > > I was able to build an img with Crochet and get the Pi to boot into a > shell. However, whenever I booting the Pi with the GPS board attached it > will not boot. > > When I plug in the GPS Add-on into the GPIO connector, my Pi fails to boot > before starting the kernel. It boots to the point where it says "Press > enter to prevent auto boot" and then the letter 'L' shows up and starts > erasing text from the screen. > > I was initially using a 1.5A power supply. It was suggested to me to try > using a stronger power supply so I tried a 2.1A power supply, but that > didn't work either. Using the 2.1A power supply resulted in the same boot > problem described above. > > Next I tried using Raspbian to boot the Pi, but a similar problem > occurred. The Pi boots without the GPS board attached. When the GPS board > is attached, it boots kernel and when the screen to start Raspbian Software > Configuration then the following message prints to the screen indefinitely: > > SysRq : HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) > memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystem(j) sak(k) > show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) > show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) > show-blocked-test(w) > > Could I get some guidance with fixing this problem? > > Thanks! > Reza > _______________________________________________ > freebsd-embedded@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-embedded > To unsubscribe, send any mail to "freebsd-embedded-unsubscribe@freebsd.org" From owner-freebsd-embedded@FreeBSD.ORG Wed Jan 21 22:04:55 2015 Return-Path: Delivered-To: freebsd-embedded@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 05FFEC2; Wed, 21 Jan 2015 22:04:55 +0000 (UTC) Received: from mail-oi0-x22a.google.com (mail-oi0-x22a.google.com [IPv6:2607:f8b0:4003:c06::22a]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id BA6B2699; Wed, 21 Jan 2015 22:04:54 +0000 (UTC) Received: by mail-oi0-f42.google.com with SMTP id i138so9219975oig.1; Wed, 21 Jan 2015 14:04:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=HlF5Atn//xoDwGXKZFsQf2Ohn6Ofhz1kxVgECOCqRyg=; b=tnC0sSpJ5X6G4DfAlFiJKnDosPcWyS9a1xP27t+Lr9nLpUnG0MTgG+XPaBM+eaBwEs n7DPWhbqxg8apR5bYWHORIT41pjHohDkejLsOhJX1OfKWWZsK4seAnxfVV8VH5R/uzG1 Hkxiqjrk3mSSW/AKyQZ/C8t+063uRlXlLBapviGxL8+6bv6iQ8uWMaTV24yDrd+5Q18O TBc87kFDNwa09Eren4cElMVsBAT715fSMqqN81RRgbpUhz5xqAxUIj9zIVbuX6rS0QAc Xr4VKSIIWJ2nGOmltBX3OgDjH4b7sLe35jYdpmFikZ5JDRALfdFdpmVoKZT9JF0AYWnd zXhQ== MIME-Version: 1.0 X-Received: by 10.202.212.66 with SMTP id l63mr10398064oig.117.1421877894023; Wed, 21 Jan 2015 14:04:54 -0800 (PST) Received: by 10.76.167.34 with HTTP; Wed, 21 Jan 2015 14:04:53 -0800 (PST) In-Reply-To: References: Date: Wed, 21 Jan 2015 14:04:53 -0800 Message-ID: Subject: Re: RBPi Doesn't Boot With GPS GPIO Board Attached From: Reza Nikoopour To: Adrian Chadd Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1 Cc: "freebsd-embedded@freebsd.org" X-BeenThere: freebsd-embedded@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Dedicated and Embedded Systems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Jan 2015 22:04:55 -0000 Adrian, Thank you for your reply. This is my first project using an embedded system like this, so I'm not sure how to check if the GPS add-on is speaking to the Pi. However, that would make sense because during the boot of Raspbian, it occasionally makes a selection from the Rasbpian setup menu without me touching the keyboard. Reza On Wed, Jan 21, 2015 at 11:16 AM, Adrian Chadd wrote: > Hi, > > Does the GPS add-on speak to the raspberry PI serial console? If so, > it's likely outputting a whole lot of GPS data via serial, and the > boot loaders for both operating systems are interpreting that as valid > input. > > > > -a > > > On 21 January 2015 at 09:57, Reza Nikoopour wrote: > > Hello, > > > > I'm currently building an NTP server using the following set up: > > > > Raspberry Pi B+ < > > > http://www.amazon.com/gp/product/B00LPESRUK/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 > >> > > Raspberry PI GPS Add-on < > > http://imall.iteadstudio.com/raspberry-pi-gps-add-on.html > > > FreeBSD 10.1 built with CrochetBSD > > > > I was able to build an img with Crochet and get the Pi to boot into a > > shell. However, whenever I booting the Pi with the GPS board attached it > > will not boot. > > > > When I plug in the GPS Add-on into the GPIO connector, my Pi fails to > boot > > before starting the kernel. It boots to the point where it says "Press > > enter to prevent auto boot" and then the letter 'L' shows up and starts > > erasing text from the screen. > > > > I was initially using a 1.5A power supply. It was suggested to me to try > > using a stronger power supply so I tried a 2.1A power supply, but that > > didn't work either. Using the 2.1A power supply resulted in the same > boot > > problem described above. > > > > Next I tried using Raspbian to boot the Pi, but a similar problem > > occurred. The Pi boots without the GPS board attached. When the GPS > board > > is attached, it boots kernel and when the screen to start Raspbian > Software > > Configuration then the following message prints to the screen > indefinitely: > > > > SysRq : HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) > > memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystem(j) sak(k) > > show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) > > show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) > > show-blocked-test(w) > > > > Could I get some guidance with fixing this problem? > > > > Thanks! > > Reza > > _______________________________________________ > > freebsd-embedded@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-embedded > > To unsubscribe, send any mail to " > freebsd-embedded-unsubscribe@freebsd.org" > From owner-freebsd-embedded@FreeBSD.ORG Wed Jan 21 22:25:09 2015 Return-Path: Delivered-To: freebsd-embedded@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 9E93F591; Wed, 21 Jan 2015 22:25:09 +0000 (UTC) Received: from mail-oi0-x235.google.com (mail-oi0-x235.google.com [IPv6:2607:f8b0:4003:c06::235]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 5EF9B8D7; Wed, 21 Jan 2015 22:25:09 +0000 (UTC) Received: by mail-oi0-f53.google.com with SMTP id i138so9326303oig.12; Wed, 21 Jan 2015 14:25:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=HdmAcU5duzZb7i6Ckz1u4FOQRka4ESQeUD0wGJ8hVAw=; b=UgerZN7ZS4DMxGDTsFhvYXJOqfLVr1f1xHDBCaxeaUFjXONzS/EfTItVeImhWrg8VC NAvtEjXv+wdsCHJGEhEfvQ+OGRixIq/RCT5UzNg8gc2G9mvOnVxYrYOPkDOs9Q3lo5Ua i4931cDrL/wrm7UtZEad1m/ZSbTa9yMsFv/oK4mJKCOlKPDClqSAkughVyFaj7VE3n/W DNO/5SbrcFj+YtJtH+Bxc3sCjdF8xSEQRdDGSWbVmg5K1sFIMzKvc0p2waI0WuUXRMLs m6UKcE6Zk+8Qu1NpWWHCegt+3CkAdP9GbrA2k4NOTMjhFSr6YWECiJz56VxUMLOL0gTq Q2Vg== MIME-Version: 1.0 X-Received: by 10.182.94.133 with SMTP id dc5mr26594410obb.32.1421879108677; Wed, 21 Jan 2015 14:25:08 -0800 (PST) Received: by 10.76.167.34 with HTTP; Wed, 21 Jan 2015 14:25:08 -0800 (PST) In-Reply-To: References: Date: Wed, 21 Jan 2015 14:25:08 -0800 Message-ID: Subject: Re: RBPi Doesn't Boot With GPS GPIO Board Attached From: Reza Nikoopour To: Adrian Chadd Content-Type: text/plain; charset=UTF-8 X-Content-Filtered-By: Mailman/MimeDel 2.1.18-1 Cc: "freebsd-embedded@freebsd.org" X-BeenThere: freebsd-embedded@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Dedicated and Embedded Systems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Jan 2015 22:25:09 -0000 Adrian, It seems like you were right about the serial port taking in the GPS output as valid input. I disabled the serial port login for Raspbian and I was able to boot into a shell with the GPS board attached. Reza On Wed, Jan 21, 2015 at 11:16 AM, Adrian Chadd wrote: > Hi, > > Does the GPS add-on speak to the raspberry PI serial console? If so, > it's likely outputting a whole lot of GPS data via serial, and the > boot loaders for both operating systems are interpreting that as valid > input. > > > > -a > > > On 21 January 2015 at 09:57, Reza Nikoopour wrote: > > Hello, > > > > I'm currently building an NTP server using the following set up: > > > > Raspberry Pi B+ < > > > http://www.amazon.com/gp/product/B00LPESRUK/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 > >> > > Raspberry PI GPS Add-on < > > http://imall.iteadstudio.com/raspberry-pi-gps-add-on.html > > > FreeBSD 10.1 built with CrochetBSD > > > > I was able to build an img with Crochet and get the Pi to boot into a > > shell. However, whenever I booting the Pi with the GPS board attached it > > will not boot. > > > > When I plug in the GPS Add-on into the GPIO connector, my Pi fails to > boot > > before starting the kernel. It boots to the point where it says "Press > > enter to prevent auto boot" and then the letter 'L' shows up and starts > > erasing text from the screen. > > > > I was initially using a 1.5A power supply. It was suggested to me to try > > using a stronger power supply so I tried a 2.1A power supply, but that > > didn't work either. Using the 2.1A power supply resulted in the same > boot > > problem described above. > > > > Next I tried using Raspbian to boot the Pi, but a similar problem > > occurred. The Pi boots without the GPS board attached. When the GPS > board > > is attached, it boots kernel and when the screen to start Raspbian > Software > > Configuration then the following message prints to the screen > indefinitely: > > > > SysRq : HELP : loglevel(0-9) reboot(b) crash(c) terminate-all-tasks(e) > > memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystem(j) sak(k) > > show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) show-registers(p) > > show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) > > show-blocked-test(w) > > > > Could I get some guidance with fixing this problem? > > > > Thanks! > > Reza > > _______________________________________________ > > freebsd-embedded@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-embedded > > To unsubscribe, send any mail to " > freebsd-embedded-unsubscribe@freebsd.org" > From owner-freebsd-embedded@FreeBSD.ORG Thu Jan 22 10:45:12 2015 Return-Path: Delivered-To: freebsd-embedded@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 9DD34473 for ; Thu, 22 Jan 2015 10:45:12 +0000 (UTC) Received: from valery.hibma.org (valery.hibma.org [IPv6:2a02:2308::216:3eff:fe79:3a6c]) by mx1.freebsd.org (Postfix) with ESMTP id 31D69DCE for ; Thu, 22 Jan 2015 10:45:12 +0000 (UTC) Received: from [192.168.178.74] (5ED2ABEE.cm-7-3c.dynamic.ziggo.nl [94.210.171.238]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by valery.hibma.org (Postfix) with ESMTPSA id 6DCB96B9807; Thu, 22 Jan 2015 11:45:09 +0100 (CET) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2070.1\)) Subject: Re: RBPi Doesn't Boot With GPS GPIO Board Attached From: Nick Hibma In-Reply-To: Date: Thu, 22 Jan 2015 11:45:03 +0100 Content-Transfer-Encoding: quoted-printable Message-Id: <68D3F200-5FF2-4C06-A029-4A753387B0F3@van-laarhoven.org> References: To: Reza Nikoopour X-Mailer: Apple Mail (2.2070.1) Cc: =?utf-8?Q?=E2=80=9CFreeBSD_Embedded_Mailing_List=E2=80=9D?= X-BeenThere: freebsd-embedded@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Dedicated and Embedded Systems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Jan 2015 10:45:12 -0000 This problem has been haunting us for quite some years, and we have = always separate hardware to enable GPS manually only after boot. It = -might- hit the keystroke to enter the BIOS, which is a big no-no for = embedded devices in remote environments. You really want to make sure = you don=E2=80=99t get bitten by that. There is usually no way to disable = BIOS entry completely (Soekris BIOS, ALIX BIOS, CoreBoot BIOS). Note: I am talking about BIOS, not even boot loader here=E2=80=A6 Nick > On 21 Jan 2015, at 23:25, Reza Nikoopour wrote: >=20 > Adrian, >=20 > It seems like you were right about the serial port taking in the GPS = output > as valid input. I disabled the serial port login for Raspbian and I = was > able to boot into a shell with the GPS board attached. >=20 > Reza >=20 > On Wed, Jan 21, 2015 at 11:16 AM, Adrian Chadd = wrote: >=20 >> Hi, >>=20 >> Does the GPS add-on speak to the raspberry PI serial console? If so, >> it's likely outputting a whole lot of GPS data via serial, and the >> boot loaders for both operating systems are interpreting that as = valid >> input. >>=20 >>=20 >>=20 >> -a >>=20 >>=20 >> On 21 January 2015 at 09:57, Reza Nikoopour = wrote: >>> Hello, >>>=20 >>> I'm currently building an NTP server using the following set up: >>>=20 >>> Raspberry Pi B+ < >>>=20 >> = http://www.amazon.com/gp/product/B00LPESRUK/ref=3Doh_aui_detailpage_o01_s0= 0?ie=3DUTF8&psc=3D1 >>>>=20 >>> Raspberry PI GPS Add-on < >>> http://imall.iteadstudio.com/raspberry-pi-gps-add-on.html > >>> FreeBSD 10.1 built with CrochetBSD >>>=20 >>> I was able to build an img with Crochet and get the Pi to boot into = a >>> shell. However, whenever I booting the Pi with the GPS board = attached it >>> will not boot. >>>=20 >>> When I plug in the GPS Add-on into the GPIO connector, my Pi fails = to >> boot >>> before starting the kernel. It boots to the point where it says = "Press >>> enter to prevent auto boot" and then the letter 'L' shows up and = starts >>> erasing text from the screen. >>>=20 >>> I was initially using a 1.5A power supply. It was suggested to me = to try >>> using a stronger power supply so I tried a 2.1A power supply, but = that >>> didn't work either. Using the 2.1A power supply resulted in the = same >> boot >>> problem described above. >>>=20 >>> Next I tried using Raspbian to boot the Pi, but a similar problem >>> occurred. The Pi boots without the GPS board attached. When the = GPS >> board >>> is attached, it boots kernel and when the screen to start Raspbian >> Software >>> Configuration then the following message prints to the screen >> indefinitely: >>>=20 >>> SysRq : HELP : loglevel(0-9) reboot(b) crash(c) = terminate-all-tasks(e) >>> memory-full-oom-kill(f) kill-all-tasks(i) thaw-filesystem(j) sak(k) >>> show-memory-usage(m) nice-all-RT-tasks(n) poweroff(o) = show-registers(p) >>> show-all-timers(q) unraw(r) sync(s) show-task-states(t) unmount(u) >>> show-blocked-test(w) >>>=20 >>> Could I get some guidance with fixing this problem? >>>=20 >>> Thanks! >>> Reza >>> _______________________________________________ >>> freebsd-embedded@freebsd.org mailing list >>> http://lists.freebsd.org/mailman/listinfo/freebsd-embedded >>> To unsubscribe, send any mail to " >> freebsd-embedded-unsubscribe@freebsd.org" >>=20 > _______________________________________________ > freebsd-embedded@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-embedded > To unsubscribe, send any mail to = "freebsd-embedded-unsubscribe@freebsd.org"