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FRDM-KL25Z fails on programming (both OpenSDA and mbed), SWD errors

Question asked by Gustavo Leal on Aug 19, 2016
Latest reply on Aug 23, 2016 by Gustavo Leal


I have a FRDM-KL25Z which was working flawlessly until recently. Now, there's an issue: the bootloader microcontroller (K20) apparently is not communicating with the KL25Z.

When I install the mbed firmware, any program I try to upload to it results in "SWD ERROR" on the fail.txt file.

I tried the solution propose on another topic, which was pressing the reset button before copying the file, but it didn't work. Seems to be a hardware problem, but I have no means to confirm that.

The KL25Z is still running the last code I programmed, so the microcontroller is working. There seems to be a problem with the communication.

I have already tested continuity on the SWD lines and it's all ok.


Any help is appreciated