Run OFW heat spreader test

[Jerry Vonau]

On Sun, 2012-01-22 at 23:16 -0600, Jerry Vonau wrote:
> On Mon, 2012-01-23 at 00:02 -0500, Richard A. Smith wrote:
> > On 01/22/2012 09:00 PM, Sridhar Dhanapalan wrote:
> > 
> >  > We are using a custom olpc.fth to present a boot menu so that users
> >  > can easily flash their XOs. As a precaution, we run a lid switches
> >  > test before the OS installation begins. Some of our XOs have older,
> >  > less effective heat spreaders, and we would like to catch these before
> >  > they get burnt-out by the flashing process.
> > 
> > The CPU has an internal thermal shutdown.  It won't burn out.  I run 
> > 1.5's without heat spreaders all the time.  The reason you want to catch 
> > them is that fs-update will hang.
> > 
> >  > The automatic lid switches test is confusing some teachers. Ideally we
> >  > only want to run the heat spreader test part of it, so that the test
> >  > is transparent and the user doesn't need to close the lid.
> >  >
> >  > Is this possible?
> > 
> > Yes.  I don' have a 1.5 with me at the moment but from looking at the 
> > OFW source I think you want ' .temp-rise '.
> > 
> > ok .temp-rise
> > 
> > That should run the thermal test and print a pass fail message.  It also 
> > returns back a true or false on the stack for if the test passes or fails.
> > 
> 
> Thanks, looking into that part of OFW code. 

.temp-rise returns a ? from the OK prompt.

Jerry