RE: Successfully program sparkfun nrf52, but programs don't run

Bjørn Kvaale — Fri, 13 Oct 2017 11:44:29 GMT

@sc4z Have you tried what endnode has suggested? Did it work for you? You might want to look at this tutorial Sparkfun has provided. This devzone case might also be helpful. This Devzone case might also help.

RE: Successfully program sparkfun nrf52, but programs don't run

endnode — Tue, 10 Oct 2017 23:34:08 GMT

If you aren't 100% sure what were the original working HEX binaries (ideally in single merged file so you can just flash it by any tool like nrfjprog) then I suggest to take some of very basic HW test examples from nRF5 SDK and try to get Sparkfun board working with them. I suppose there is a LED so you can just retarget the PIN from nRF5x DK (all nRF5 SDK examples are by default compiled for one of Nordic dev kits) to the PIN number corresponding to Sparkfun feather. If there is no LED I'm sure you can get one and connect it through the bread board and jump wires. By this you should get LED blinking which shows that both HW and flashing procedure are OK. From there you can move to more complex examples which are using radio (because there are LFCLK configurations which might differ between nRF5x DK boards and Sparkfun...)

Also there are people using and asking for help with Sparkfun nRF52 board on this forum, are you sure that none from previous questions answers your problem?