Added Board WeAct Studio RP2350B Core

[cvmanjoo]

Added this board,

WeAct Studio RP2350B Core

More info about this board.

https://github.com/WeActStudio/WeActStudio.RP2350BCoreBoard

https://micropython.org/download/WEACTSTUDIO_RP2350B_CORE/

https://www.cnx-software.com/2025/02/03/tiny-weact-rp2350b-core-board-exposes-all-48-i-os-from-the-raspberry-pi-rp2350b-microcontroller/

I have tested the firmware file on this board and works fine.

[bablokb]

I would suggest that you also add alias pin names for the ADCs:

{ MP_ROM_QSTR(MP_QSTR_GP40_A0), MP_ROM_PTR(&pin_GPIO40) },
{ MP_ROM_QSTR(MP_QSTR_GP40), MP_ROM_PTR(&pin_GPIO40) },
{ MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_GPIO40) },

and so on for A0-A7. This would make writing portable code easier.

[cvmanjoo]

Yes, I will add them, just trying to get PID for now.

[dhalbert]

Check @bablokb's pin names suggestion above. Close to merging!

[cvmanjoo]

@dhalbert Could you please check the above changes.

[embankment]

Good board! I hope this board definition will be in the next release.

[bablokb]

@cvmanjoo: according to the schematic, GPIO0 is used for PSRAM CS. You also have this pin in mpconfigboard.h for CIRCUITPY_PSRAM_CHIP_SELECT, this seems correct. Howver, since this pin is used internally, you should not expose it in pins.c (@dhalbert please correct me if I am wrong).

[IrregularShed]

Thank you for your work, @cvmanjoo - I was getting ready to try and do this all myself. Any chance of an update, @dhalbert (please) so we can have official support?

[dhalbert]

Howver, since this pin is used internally, you should not expose it in pins.c (@dhalbert please correct me if I am wrong).

That is correct: pins that are dedicated for internal uses, such as connecting to PSRAM or flash, should not be exposed in pins.c. Same of course for pins that are unconnected.

resolved

[IrregularShed]

I've had a look around the hardware this afternoon, with the schematic and a multimeter. I've also built CircuitPython with the pin definitions from @cvmanjoo - my first time building it from scratch!

Unlike something less barebones - like the Feather RP2350, which tucks away GPIO8 purely for the PSRAM option - on this one GPIO0 gets broken out and can be used as a normal pin. They're also not (as far as I've been able to find) sold with a PSRAM chip fitted, so the default configuration is that GPIO0 is "just a pin" rather than something to reserve for internal use. For this to not be the case will be an exception, not the norm.

If it were up to me, I'd get rid of CIRCUITPY_PSRAM_CHIP_SELECT as standard, and add a caveat to the board documentation to say if you want to use PSRAM you'd need to build the firmware yourself, or offer a second board definition that includes the option. Personally, I think if you're up for soldering on an SMD memory chip on the underside of a cheap dev board, you should be able to do a DIY firmware build 😁

(As it is up to me for my own build, I've removed it from mine...)

[bablokb]

Good point!