topic Re: porting MK22FN MCUBOOT SDK middleware to MK21FN in Kinetis Microcontrollers

porting MK22FN MCUBOOT SDK middleware to MK21FN

gschelotto — Mon, 02 Aug 2021 18:22:46 GMT

Hi,

MCUBOOT is not available for MK21FN as SDK middleware but I wonder if I can get this package for the MK22FN (in this case yes, it's available) and port it to the MK21FN MCU. How difficult would it be?

Thanks in advance,
GS

Re: porting MK22FN MCUBOOT SDK middleware to MK21FN

jingpan — Wed, 04 Aug 2021 03:18:26 GMT

Hi @gschelotto ,

I think it wouldn't be very difficult. MK21FN architecture is similar to K22F120M. K21FN has SDK too. So,

1. use the K21FN SDK toreplace the driver and chip related file.

2. IO configuration.

3. maybe some clock

4. The peripherals which is used for download applications.

Regards,

Jing

Re: porting MK22FN MCUBOOT SDK middleware to MK21FN

gschelotto — Wed, 08 Sep 2021 06:27:35 GMT

Hi Jing,

I've finally ported the MCU boot to my custom MK21 board following your suggestions. Everything work as expected and it's totally compatible with our CAN tools used for the MK22 ROM Bootloader. Thank you for the given support!

regards,
gaston