navX-MXP includes libraries which are compatible with the RoboRIO Libraries from WPI, and are available in each of the languages/development environments commonly used to development FIRST FRC robot applications:
These libraries provide access to navX-MXP via SPI, I2C, USB and UART interfaces – as well as USB interfaces to navX-Micro and VMX-pi.
[Update: 1/13/2018 – Version 3.0.346 has been released, which is compatible with the 2018 FRC release version 2018.1.1. There are no known issues for release.]