RE: SDK blinky example with softdevice does not start on nRF52832

Norbert — Mon, 10 Sep 2018 08:28:08 GMT

Hi TJ,

Thanks a lot for you quick response. I erased all flash as you suggested and the code now works.

Thank you very much!

RE: SDK blinky example with softdevice does not start on nRF52832

Turbo J — Fri, 07 Sep 2018 15:48:42 GMT

The bootloader resides in high flash addresses. And it compares the FLASH to a checksum that it genereated during DFU and wrote to a "special" page in bootloader space.

This prevents you from "just" flashing a new app using a debugger, since the checksum won't match and thus the bootloader will not start the app.

Workarounds:

Remove the bootloader by erasing all flash
Re-write the bootloader page with the correct CRC when debugging (in theory, have not actually tried that one)
Re-Write the bootloader page with a "don't care" CRC value