Dragos,
I think I've found my mistake.
source ps7_init.tcl (provided that I'm on the right Path)
ps7_init
init_user
are part of the ARM core programming. So it's enough to do that in XMD just 1 time after programming FPGA. After that changing and debugging the software source would only need making a connection to ARM and probably reset the processor. That's it.
So I think we can close this thread.
Best Regards,
FArid