I'm currently working on a bootloader for a K64 board.
I'm nearly there, the flashing seems correct but I'm stuck when I have to launch the user application I just flashed. I tried a few technics that just reset my MCU back to the beggining of the bootloader program.
I saw there was an bootloader example for KDSv3.2 but it unfortunately doesn't compile on MCUXpresso. Kinetis Bootloader for FRDM-K64
Does a MCUXpresso ready version of this bootloader (or any other one for the K64) exists so I can test it?