Hello jun yamada
You can find the drivers along with a crc example at a file named "FRDM-KEXX Driver Library Package". You can find it at this link: FRDM-KE04Z|Freedom Development Platform|Kinetis® MCU | NXP
Let me know if this is helpful, if you have more questions do not hesitate to ask me.
Best regards,
Omar
Hello jun yamada
You can find the drivers along with a crc example at a file named "FRDM-KEXX Driver Library Package". You can find it at this link: FRDM-KE04Z|Freedom Development Platform|Kinetis® MCU | NXP
Let me know if this is helpful, if you have more questions do not hesitate to ask me.
Best regards,
Omar