With this software you can talk to yout powerstep01 device via spidev.
./powerstep <-D>[-sdi] -D --device device to use (default /dev/spidev1.1) -s --speed max speed (Hz) -d --delay delay (usec) -i --ini ini file
With the ini file you can pass default settings to the device.
In the prompt, type help for a list of commands and help for details of the specific command.
Just type make in the powerstep folder
This software is under GNU GPLv2