onewire spark.io https://github.com/Hotaman/OneWireSpark/blob/master/firmware/OneWire.cpp msp430 https://github.com/dsiroky/OneWire arduino, teensy https://github.com/PaulStoffregen/OneWire stellaris https://github.com/MrDoomBringer/stellaris-onewire energia https://github.com/petrm/OneWire