nrfjprog consumes 100% CPU power

[Ernestas Gruodis]

Hi, I'm programming via SWD nrf51822 chip using nrfjprog with nrf54L15-DK as programmer, with this script (Windows 10  or 11 OS):

ECHO OFF
nrfjprog --recover -f NRF51 > nul 2> nul
nrfjprog --family NRF51 --program some_fw.hex --chiperase --verify 
nrfjprog --rbp ALL --family NRF51  > nul 2> nul
nrfjprog --family NRF51 --reset > nul 2> nul

ECHO End

set /p DUMMY=Hit ENTER to continue...

Sometimes nrfjprog hangs, and in Task Manager I can see, that jlinkarm_nrf_worker process consumes all CPU resources. In such cases I end this process. This helps, but not convenient.

Is it possible to resolve this issue?

[Turbo J]

Yes, but it will require a significant redesign of your script/batch file. You can't simply ignore all errors.

[Ernestas Gruodis]

The problem is, that it hangs all Windows system.. I suspect it happens when physical SWD contact is lost during / before programming. Seems, that nrfjprog enters into some "while loop".