Castle Link Live on Arduino

hi,

i new arduino programming, have project putting together.   this project based on rc aircraft motors , castle creations escs motor/prop testing.  goal pass telemetry data castle esc through castle serial link board , pc through arduino.  arudino receive analog input external sensor , pass pc.  data post-processing done @ pc.

here link castle link datasheet, explains communications protocols.
http://www.castlecreations.com/support/documents/castle_serial_link_v1.3.pdf
i use spi protocol.  have been doing reading on spi , trying pick through various example programs, can't work.  if community point me in right direction on how talk device, appreciated.

thanks!

have read ?
- http://tronixstuff.com/2011/05/13/tutorial-arduino-and-the-spi-bus/ -

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