[wireties]

Sure, the Pi can be used. Be careful what you use it for! There are restrictions about motor and sensor control going through the cRIO.

The classic use of the Pi is to connect a USB camera to the Pi, run the targeting algorithms and send the targeting data to the cRIO via Ethernet. This is perfect legal.

One could also have the Pi process accelerometer and/or gyro data then send field position data to the cRIO. This is also legal.

HTH