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How to get a J-link debugger running on an FRDM-KL03Z board

Question asked by Filip Dossche on Apr 24, 2015
Latest reply on Apr 24, 2015 by Filip Dossche



I can't get my Segger J-link Ultra to work on my FRDM- KL03Z board.


I have set up everything as described in this thread: Low power demo application on FRDM-KL03Z board


It works to a degree: the link to the GDB works, the J-link is detected and set up.

It is just the connection to the board which fails (see attached log file).


I am absolutely sure that the J-link is properly connected ( I have checked it often enough by now) which is confirmed by the fact that the supply voltage is correctly measured.


I can't believe there is something faulty on the FRDM board or the Segger J-link so I suspect it is just a matter of the software/hardware setup.


Note: the FRDM board is still powered by the USB port but from a software point of view it is inactive so I would suspect it does not influence the operation of the SWD_DIO, SWD_CLK and RST pins but I may be wrong about that.


Any help/suggestion much appreciated.

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