This PST application shows the first Fixed-point arithmetic library object on OBEX. The "SPIN_TrigPack" object is a complete Fixed-point package with the basic trigonometric functions for robot and navigation projects. You can do ATAN2 without enlisting extra COGs to run a full Floating-point library for that function. This small object has string conversion utilities to make Fixed-point math easy in your SPIN language based applications. As a bonus, this object contains the first True Random Generator with the Propeller microcontroller using only SPIN code. This TRNG will repeat its sequence only after the end of Times.