Hi everybody,
I have some (probably) easy to solve issue with nRF52840 dongles.
I've got from my company's collagues few dongles. With one of them I have some issues to program it correctly. I'm using SDK 1.9.1 and Programmer v3.0.0. I can upload simple blinky project as well as ready made hex files like nRF sniffer etc. after programming everything works correctly until I perform power-on reset, then it always enters into bootloader mode (pulsing red diode). Executing exactly the same path with another dongle, full power-on cycle results in booting to programmed application.
I wonder if somebody who was playing with this dongles didn't change some configuration bits and now it always enters bootloader. I even tried to turn it on with external 5V power supply but it gives always the same result. After inspecting both boards under microscope I haven't found anything suspicious (also button works correctly).
So my question is: is there any configuration bit which would result to always enter bootloader? How can I check it and how can I change it?
Best regards,
Adam
