Lpc2000

Robert Adsett wrote:

>  Neither of those will provide a data watchpoint though which is what I
> was
>  referring to above.  Since in order to implement that you would have to
>  single step through the code at the instruction level and evaluate at
> every
>  step.  This would be considerably below full speed.  I suspect that this
> is
>  only possible with a proper ICE and I haven't seen one of those for any
>  micro that has a BDM or JTAG interface.

And the ARM7 has a proper ICE.
See my previous post http://groups.yahoo.com/group/lpc2000/message/9851
which explains the function of the ARM Embedded ICE module.

A breakpoint is just a watchpoint that breaks on address + instruction
fetch. A watchpoint breaks on address + data read/write, possibly with a
specific data pattern.

This means that the ARM can use a hardware watchpoint while running at
system speed. I have used this using the ARM RealView tools.

I am not sure of other debuggers though.

Rob