Re: Is there a DER for the MPC82xx?

["Mark Chambers" <markc@mail.com>]

From: "Dan Malek" <dan@embeddededge.com>

> 
> On Jan 26, 2005, at 10:53 AM, annamaya wrote:
> 
> > Can someone tell me if the BDI will be able to catch
> > all different kinds of exceptions/interrupts on the
> > MPC82xx without requiring any special register
> > programming? I am unable to find anything that that
> > resembles the DER register on the MPC8280.
> 
> The BDI2000 works very nicely on 82xx processors.
> The 82xx debug unit is the standard COP interface,
> completely different from the 8xx debug interface.
> Stop looking for a DER on the 82xx, plug in the
> BDI2000 and use it.  Make sure you understand all
> of the features of the BDI2000, as even on the 8xx
> you should not be worrying about the DER. Let the
> BDI2000 configure all of that accordingly based upon
> what you are asking it to do.
> 
> 

Well, the DER lets you look for multiple conditions at
once.  Your program is blowing up, the memory is
getting trashed and you don't even know if the hardware
is valid - that's where BDM really shines.  I don't see
where COP let's you do the equivalent of setting a
bunch of bits in the DER, so please enlighten us if
we're missing it!

Mark Chambers

P.S. I've read the BDI manual - I don't see it.  My manual
says the BDI can only set one hardware breakpoint, and
stuff like VECTOR CATCH assumes valid memory.