Lpc2000

> It might not be the right place to ask, but is there a way to identify
> if a JTAG adapter (ex: IAR JLink) is connected or not.

Already answered in the archives here.

The TRSTn line is driven active high by a good JTAG, use a pulldown resistor
on your board to be sure it's low when the JTAG is not connected. Sense the
line level with a spare GPIO pin (a spare pin is the hardest part...).

Regards,
Arie de Muynck