From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ira W. Snyder <iws@ovro.caltech.edu>
Date: Fri, 15 Feb 2013 11:28:38 -0800
Subject: [U-Boot] break command.
In-Reply-To: <2586B402-FB69-465C-82A4-62A065C74234@3gfp.com>
References: <1360873151.47041.YahooMailNeo@web125104.mail.ne1.yahoo.com>
	<20130215133823.4ab72adc@lilith>
	<2586B402-FB69-465C-82A4-62A065C74234@3gfp.com>
Message-ID: <20130215192838.GA24862@ovro.caltech.edu>
List-Id: <u-boot.lists.denx.de>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
To: u-boot@lists.denx.de

On Fri, Feb 15, 2013 at 02:00:10PM -0500, Harvey Chapman wrote:
> On Feb 15, 2013, at 7:38 AM, Albert ARIBAUD <albert.u.boot@aribaud.net> wrote:
> > On Thu, 14 Feb 2013 12:19:11 -0800
> > (PST), Sean Omalley <omalley_s@rocketmail.com> wrote:
> > 
> >> Is there anyway to break back into u-boot after trying to boot from linux (arm)? Similar to Open Firmwares stop-a, ctrl-break? I didn't see anything in the documentation nor poking around online. I am really hoping I missed something, or there is support that just needs to be compiled in. :)
> >> 
> > As soon as U-Boot gives control to the payload (Linux or whatever)
> > there is no possible assumption that U-Boot remains intact in RAM, so
> > your only chance is indeed some hardware reset... But then the question
> > is not related to U-Boot any more.
> 
> On that note, does anyone know of a device that would do this? Perhaps a combination device like this:
> 
> - USB interface to a pc
> - serial port for device
> - relay controllable A/C power plug (U.S.)
> - controllable gpio (for wiring to a power button, reset switch, etc)
> 

I have a BayTech network-attached powerstrip that does something
similar. It has switchable AC outlets and network-accessible serial
ports, but it doesn't have controllable GPIOs or a USB interface.

Ira