[U-Boot] break command.

[Ira W. Snyder]

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 at aribaud.net> wrote:
> > On Thu, 14 Feb 2013 12:19:11 -0800
> > (PST), Sean Omalley <omalley_s at 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