I am new to use MCUXpresso, I think it's time to get rid of Processor Expert.
I used the default configuration for FRDM-K64F, and I used GPIO driver attempting to light up the leds. But it didn't work.
Here is the configuration:
Here is the code generated by PinTool:
And at last the code I wrote:
All go normally, I can run step by step and it runs into the main no error, but led didn't light up.