Functions that need to be replaced

[BayesianScrub]

These functions need to be created for the rpi to interface with it's GPIO.
pinmode()
could be replaced with a table of #defines
dataPin
registerSelect
clockPin
chipEnable
resetPin

digitalWrite() is used to directly drive a pin high or low, and will need to be replaced with a GPIO alternative.

shiftOut() a better option would be to find a standard protocol that we could use.

[u6bkep]

as far as I can tell, the interface for the Arduino pin control is the same as the pin control for the wiringPi library. but we still need a replacement for shiftOut().

[u6bkep]

we also need to find a replacement for the arduino print.h dependency.