Hi,
I'm making some experience with AT91RM9200-EK board and now I'm triying to debug a simple application with gdb via DBGU port, because I don't have a JTAG interface. I installed Cygwin and GNUARM on my computer (a notebook with a usb to serial converter on COM5) and the Linux distribution on the board, following the Getting Started Instructions. Then I boot Linux on the board and I open gdb on my computer, then I type:

set remotebaud 115200
set debug remote 1
target remote com5

gdb says me "COM5: permission denied". I don't think to have problems with the usb to serial converter driver, because all seem to go when I upload applications with Hyper Terminal via COM5. I also tried to install GNUARM without Cygwin, adding only the dll needed as the installation prompted to me, but the result to the same instructions was :

"COM5: Inappropriate ioctl for device"

Can anyone help me? I've been searching a long on google and other forums but all the attemps don't seem to work. Thanks a lot.

Michele

mig,

did you try this :-


target remote /dev/ttyS4 ??

Note that's an uppercase 'S'.


P.