I created easy tutorial for UART KSDK blocking demo which works as echo.
The demo works with KSDK 1.1. and is created for KDS 2.0.
Because it could be problem if was used this pin
by this reason was chosen UART 3, which is available to use and is routed to PTC16,PTC17
connection on Arduino header
for this case is use ALT3 function (PTC16, PTC17)
Final output from terminal
Physical connection between FRDM-K64F and USB to Serial Converter
The unzipped folder must be located in example folder at C:\Freescale\KSDK_1.1.0\demos\