Resetting target using reset pin only (without SWD logical connection)

[ptundo70]

Hello.

Regarding STM32CubeProgrammer CLI, I'm wondering if it is possible to reset an STM32 target only driving (high->low->high) its physical reset pin (NRST of ST-Link V2 connector) and without establishing a logical SWD/JTAG connection with it. Of course NRST of STM32 on my board is routed to NRST of connector and I could issue a reset grounding the latter with a piece of wire.

I tried various combination of "-hardRst" but any command without the "-c" switch is refused.

Any suggestion?

Thank you in advance.

Best regards,

PT

[Aziz BRIGUI]

Hello @ptundo70,

Could you explain the need behind not wanting to connect before controlling the ST-Link reset ? It's safe to say that the expected behavior in STM32CubeProgrammer is to connect first in order to know the interface (If the interface used is other than ST-Link or J-Link, a hardware reset won't be possible).

Aziz

[ptundo70]

Because I'm using reversible RDP2 and connecting halts the core until next power-on reset, but sometimes I only need to reset it; please note that physical power-on isn't feasible on the final product since battery is soldered.

Best regards,

PT