help please driver_lis3dh

I’m trying to get the tests/driver_lis3dh running on a Nordic nrf51 using 1; a BLE400

interfaced to a accelerometer cjmcu-33


2; a CJMCU-8223 Nrf51822

my problem is that I cannot get any output from term - it seems to lock out without any output

I’m trying to debug it with gdb , put having got the skills to really understand its output