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how do i use a frdm-k22f to program an external k20?

Question asked by Rodney Sinclair on Apr 7, 2016
Latest reply on Apr 11, 2016 by Alice_Yang

I'm developing code for a K20 processor and would like to use my FRDM-K22F board to program it, however none of my attempts have been successful.

 

I cut the trace underneath J4 as described in the documentation and it appeared that the programmer was still talking to the on-board K22 rather than my external K20.  I removed the SWD_DIO pin on the K22 and now the programmer  doesn't work at all.

 

It it possible to use the FRDM-K22F to program an external K20?  If so, what have I missed?

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