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OpenSDA / DAPLink do not update - stuck in MAINTENANCE

Question asked by Vladimir Blanshey on Jun 13, 2018
Latest reply on Jun 18, 2018 by Vladimir Blanshey

This looks like an old problem and the solution is available from mbed but following it I still cannot upgrade firmware.

My FRDM-K64F board debug firmware was corrupted and I followed the instructions on https://os.mbed.com/blog/entry/DAPLink-bootloader-update/   to the letter . I got OpenSDA to boot as MAINTENANCE but on the step #5 the upgrade to the DAPLink did not work: after the upgrade firmware still boots as MAINTENANCE. As a result, it is only a storage device but not recognized as a debug probe. Tried to upload OpenSDA binary from OpenSDA Serial and Debug Adapter|NXP 

the same result - the board stuck in MAINTENANCE and no debug probe recognized.

Please help.

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