problems getting Pirelli DP-L10 to work

Hi, maybe I'm missing something, but when I read that the Pirelli DP-L10 would be supported I tried to get it running: I didn't patch my usb-module, but used: modprobe -v cp210x echo "0489 e003" > /sys/bus/usb-serial/drivers/cp210x/new_id from the steve-m/testing-branch I compiled the firmware and loaded it with ./host/osmocon/osmocon -p /dev/ttyUSB0 -m romload target/firmware/board/pirelli_dpl10/hello_world.highram.bin onto the phone... that worked but I was never able to see any messages after the upload: Received block ack from phone Sending checksum: 0xaa Checksum on phone side matches, let's branch to your code Branching to 0x00820000 Received branch ack, your code is running now! ... there it stayed forever ... I'm pretty sure that the code runs, because I commented in init.c the keyboard lighting code and it didn't light up after upload. I've tried other bins but to no success. Any hint or am it too early playing with that hardware? Greetings Leif