Hi Yaniv Bar on,
Thank you for your interest in the NXP kinetis product, I would like to provide service for you.
Do you mind to use the iar version?
Because I find one our application note contains the mmcau IAR project.
Maybe you also can refer to the IAR project to migirate to your MDK.
Please download the an4307 and it's software:
https://www.nxp.com/docs/en/application-note/AN4307.pdf
https://www.nxp.com/docs/en/application-note-software/AN4307SW.zip
Please check it on your side.
The code is based on the K60, but you can refer to it.
BTW, I find the TWRK-K60D100 sdk contains the mmcau MDK project, you can download it from this link:
https://mcuxpresso.nxp.com/en/select

Wish it helps you!
If you still have questions about it, please kindly let me know.
Kerry
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