Internal temperature sensor example.

This example project uses the EFM32 CMSIS and emlib to demonstrate
the usage of the internal temperature sensor on EFM32 Happy Gecko devices.

Measurement results are presented on the LCD display, hit PB0 to display
values in Celsius (default) or PB1 for Fahrenheit.

Board:  Silicon Labs SLSTK3400A_EFM32HG Starter Kit
Device: EFM32HG322F64
