Lpc2000

At 05:08 PM 3/25/04 +0000, you wrote:
>OK, maybe I'm missing something because my JTAG debug knowledge is
>only from 8bit micros (mainly AVR's).  As I understood things the
>first thing that happens in a JTAG debug is loading the program into
>memory.  If a particular JTAG (wiggler in this case) cannot load
>flash then I assume that debugging a flash based program cannot be
>done.

Actually the wiggler is agnostic on the issue.  It's the software using the 
wiggler that needs to support programming the flash.  It is also quite 
possible to debug in flash using JTAG w/o programming the flash over JTAG, 
the two are quite independent (other than using the same communications 
channel).  I often use GDB to debug in flash over JTAG and use the serial 
connection for programming the flash.

Debugging in flash requires that the debugger support the HW debugging 
registers in the LPC. GDB's  support in this area is incomplete but useable.

Paul's suggestion of getting a debugger that supports the wiggler more 
completely is probably a good one.  I haven't used his product so I can't 
testify as to its usefulness.

Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,
be they legal, genetic, or physical.  If you don't believe me, try to
chew a radio signal. "

                         Kelvin Throop, III