Raspberry Pi 3 running Linuxcnc and controlling a stepper
Raspberry Pi 3 is running the RT kernel from http://www.frank-durr.de/?p=203 and a stock 2.7.7 LinuxCNC compiled as 'uspace'.
The GUI used is gmoccapy_lcd7
The motion controller is a STM32F103 Minimum System Development board running custom firmware.
The motor is driven by an DRV8825 stepstick.