Does anyone know the pinout for the S2 board? or which pin is the extruder motor run current pin?

[Vimknight]

As title.
Upgraded to a sherpa mini and a tiny moons motor stepper motor but need to change the Vref and run current. Vref was easy, run current needs me to define an Output_pin in klipper so I need to know the pinout of each one usually listed as PB9 on the Voxelab D1

Cheers you'd be saving my ass

[Mik-S-UMS]

The Aquila boards do not have this.
To be able to setup current from firmware the drivers need to be in UART mode but they have not been wired up this way.

There was a hardware mod to enable UART mode for Linear Advance in Alex's FW several years ago by using some unused IO pins before the bug in Marlin was fixed. This should also allow you to use the current setting.

I reverse engineered the H32 board here but the one in the S2 should be 95% the same besides some layout changes if it uses the N32 chip.
Hopefully this will have the info you need.