Lpc2000

I have to agree with Leon even though I have built my
own serial based JTAG debugger.  Is USB an option for
you?  For me, I just wanted something that would work
with my laptop and using a serial device with the FTDI
USB 2 Serial adapters has been pretty successful for
me in the past.  I am now in the process of getting
rid of the serial component of my JTAG debugger and
just using USB.

Pros of Serial:
-I had lots of fun learning how to implement the JTAG
interface (I used an Ubicom SX28 chip to bit bang out
the necessary JTAG signals and talk to the PC via the
UART) and building a command line debugger that has
(...or will have) the features that I want.

Cons of Serial:
-Other interfaces (USB and Parallel) are much faster. 
When you are debbugging something, the last thing you
want to be doing is waiting around for the debugger to
do its thing.
-You will most likely have to build your own interface
and debugger or make some major changes to an existing
JTAG interface hook into GDB.
-If you don't want to learn all the details of how the
ARM7 core is debugged using JTAG, then the time and
effort required to build your own serial based
debugger would be complete agony :)


--- Leon Heller <leon.heller@...> wrote:
> It could be done, but you'd have to develop your own
> software. It wouldn't 
> be all that popular, given the trend towards
> eliminating serial ports from 
> laptops.
> 
> Leon 


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