Hi all,
Ive been able to develop for a few weeks with our nrf52840 device and were able to run our code and do some basic Bluetooth stuff. Suddenly I can no longer flash the device. Last steps I did was doing an eraseall, flashing firmware and softdevice (all using nrfjprog commands) and then did a power cycle. Flashed firmware doesn't seem to run and all I get from the segger when trying to erase anything is " Failed to read device memories ".
I've tried to recover it (using tutorial Recover the nRF52 · GitHub) but this gives the "ERROR: Recover failed. Please make sure that the correct device family is given" Or when doing a reset prior the error " Failed to read device memories. "
nrfConnect programmer V3.0.4 also states " Unsupported device. The detected device could not be recognized as neither JLink device nor Nordic USB device. " when I try to connect to it.
The device seems to be in a locked state. Anyone has any suggestions what I might try?
I am using a nrf52840 with S140, nrfjprog version: 10.17.3 external ; JLinkARM.dll version: 7.66a and the supply on the chip is ok.
Kind regards,
Taxara
