Are there any suggested debug steps when the loading steps for OpenSDAv2 copy binary and for DAPLink copy binary to FRDM-K64Fdoes not work as described (e.g., does not come up in maintenance mode)?
Please check below thread with similar requirement:
When i connect TWR-KE18F to my PC it shows portal device instead of COM PORT. I unable to change bootloader due to that problem.
The OpenSDA firmware for FRDM-K64F board could be download from here.
Wish it helps.
Retrieving data ...