Hi ANJU ANTONY,
Thank you for your interest in NXP kinetis product, I would like to provide service for you.
I don't recommend you use the Processor Expert project anymore, because as I know, it is not recommended.
I suggest you use our newest SDK code for FRDM-K64, we have both the SPI master and slave code for your reference.
Please download the SDK code for FRDM-K64 from this link:
Welcome | MCUXpresso SDK Builder
Choose the board as FRDM-K64, generate the code and download the SDK.
You can find the SPI master and slave code from this folder:
SDK_2.5.0_FRDM-K64F\boards\frdmk64f\driver_examples\dspi\polling_b2b_transfer

Wish it helps you!
If you still have question about it, please kindly let me know.
Have a great day,
Kerry
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