68HC11

[steve ravet]

Shannen Durphey wrote:
> 
> Tom Sharpe wrote:
> >
> > > From: Bruce Plecan <nacelp at bright.net>
> > > To: gmecm at esl.eng.ohio-state.edu <gmecm at esl.eng.ohio-state.edu>
> > > Date: Sunday, May 30, 1999 7:09 PM
> > > Subject: 68HC11
> > >
> > > >It's been mentioned to me that they use this cpu, in robotic applications,
> > > >and that there are protyping/project boards, and simulations the will run
> > > >code on a PC to check for error
> >
> > Bruce. I've been over this issue and suggest the HC12 because it's faster, has a
> > BDM connection, and is instruction compatable with the HC11.
> <snip>
> 
> You're already mentioning stuff that's beyond us wrenching types.
> What's a BDM connection?

BDM means "background debugging mode".  It's a few pins on the processor
that allow you to do debugging from outside the chip.  From the BDM port
you can halt the CPU, read/write the registers, read/write any memory in
the system, set breakpoints in the code, etc. etc. etc.  Lots of
processors have them, they're all the same idea but none are compatible
with each other.

Usually there's an interface board that connects between the processor
and a PC, and some debugging software on the PC that lets you see what's
going on.

--steve

>  BP and I are looking for tools to help us
> with a "hands on" approach.  Doesn't matter what processor is used, as
> long as the end result doesn't confuse the issue.  I think the idea
> with the robotics mention was maybe finding books or projects that are
> less intended for engineering courses.
> Shannen

-- 
Steve Ravet
steve.ravet at arm.com
Advanced Risc Machines, Inc.
www.arm.com