Pin reset with nrfjprog has no effect

[AndreKR]

When I run nrfjprog --pinreset it says "Applying pin reset" but it has no effect on the connected nRF52832, it just continues running. Other nrfjprog operations like reading, programming, etc. work just fine.

In VS Code, when I click "Flash" it will program the chip successfully but it will not reset it afterwards. However, when I click "Reset Board" under "Connected Devices", then it resets successfully.

What can cause this?

[Vidar Berg]

Hello,

Are you testing this on a Nordic 52 DK, or a custom board? If it is a custom board, are you sure the reset pin is routed out to the debug header?

"Reset Board" under "Connected Devices", then it resets successfully.

This will perform a soft reset through the debug interface.

[AndreKR]

Well I certainly have not plugged any reset line into my J-Link, that might be the problem. :) I assumed it would reset using the SWD interface.

Is it possible to change the "Flash" action in VS Code to use SWD instead of a dedicated reset line to perform the reset after flashing?

[Vidar Berg]

I see. Then you can use "--reset" instead of "--pinreset" when using nrfjprog. The reset type used by the "Flash" action (i.e. "west flash") is controlled by the board configuration as discussed in this thread: https://devzone.nordicsemi.com/f/nordic-q-a/84537/enabling-pin-reset-is-still-active-even-with-config_gpio_as_pinreset-n/351824#351824