mbedmicro/mbed — pull request #695 by autopulated (2014-11-13 11:27:45+00:00)
Title: add USBTX and USBRX pin definitions for targets that don't provide them

This is so that all of the completely generic tests compile for all targets.

I'm not sure if NC is the correct definition for these – maybe they should be set to whatever the debug IO pins are? – but NC seemed like a safe place to start.