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Programming Kinetis K22F

Question asked by Alex Vergara on Jun 22, 2018
Latest reply on Jun 26, 2018 by Mark Butcher

I have a K22FN512 on a custom board.  Development was done in mBed on a FRDM-K22F.  I have attempted to load through the mBed as a programmer to the 10-pin SWD header with no luck.  Now with a P&E Micro Multilink Universal and MCUXpresso v10.2.0 I have also attempted to just erase the chip but get:


PEmicro GDB Launch Failure : The GDB Server was not able to establish a connection to the target processor. Please check your connections and power. Verify that the launch settings in the Debug Configuration are accurate.


However, with a logic analyzer I see the reset pulled down, activity on clk and dio, the reset is released, and then more activity.  But I still get the debugger failing.