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Date:      Wed, 21 Jan 2015 14:25:08 -0800
From:      Reza Nikoopour <rnikoopour@gmail.com>
To:        Adrian Chadd <adrian@freebsd.org>
Cc:        "freebsd-embedded@freebsd.org" <freebsd-embedded@freebsd.org>
Subject:   Re: RBPi Doesn't Boot With GPS GPIO Board Attached
Message-ID:  <CAKesZq1NXO6C3gkwczW3n02nVV5r22iOBqMyrTnO-1RhWA74zQ@mail.gmail.com>
In-Reply-To: <CAJ-VmomFNfEt9f-=v7mm2Gz=hw1BQUVBk2ppjRnWhwuXVXTzxQ@mail.gmail.com>
References:  <CAKesZq3ZB8j-MmNbCUoB2irdVyztuEPaVy-X95WqB9WQd3uZTg@mail.gmail.com> <CAJ-VmomFNfEt9f-=v7mm2Gz=hw1BQUVBk2ppjRnWhwuXVXTzxQ@mail.gmail.com>

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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 <adrian@freebsd.org> 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 <rnikoopour@gmail.com> 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"
>



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