The FatcatLab EVB is a LEGO MINDSTORMS EV3 compatible cape for BeagleBone.
evb/evb_ports_core.c
evb/evb_ports_in.c
evb_input_port_mode_info
evb/evb_pru_i2c.c
evb/evb_ports_out.c
evb_output_port_mode_info
evb/evb_input.c
evb/evb_battery.c
evb/evb_sound.c