Exit from debug mode

[Jérémy Michaud]

Hello,

I did some power measurement on the nrf52 DK with the Nordic profiler kit and the result was way more than what we could expect from a nrf52 (about 1 mA). Even in power off mode, it still needs about this amount of current.

After a search on the devzone, I discovered that it could be because the nrf52 is in debug mode. In this mode, the nrf52 never goes on power down mode et consume way more than in normal mode.

I tried to power reset the chip in order to enter normal mode. But I didn't work.

I also tried nrfjprog --pinreset, but it didn't change anything either.

Finally, I saw on that thread that the code to know whether the debug mode is enabled or not is :

if (DWT->CYCCNT != 0) { bsp_board_led_on(LED); }

And the LED is always on when I run this code.

Is there a solution to exit the debug mode ?

[Bjørn Kvaale]

Bonjour Jérémy. Talked to a colleague here at nordic and his opinion was that a power reset should be able to fix the problem (i.e. get your nrf52 out of debug mode). The nrf51 series had this issue you were describing. If a power reset didn't work there, you could connect an external resistor to the SWDCLK pin (see Tutorials section under link). But since you are using an nrf52, this issue was fixed. Could you explain to me the steps you took to do a power reset?