I've downloaded the example for the FRDK-KL25 board on MCUXpresso, but I've some questions about USB.
- Where I can download the USB stack? If I create a new project in MCUXpresso USB isn't present.
- How can I configure the stack to use it with Freertos? I've seen there are some defines, but I cannot try it in the example because the file "usb_osa_freertos.h" are missing.