i75/i75w: Auto-detect board and set up user button.

[ageeandakeyboard]

Allows for the Interstate75 (non W) user button to be used with our new python module

[ZodiusInfuser]

Thanks @ageeandakeyboard. This should really do some handling of Interstate75 vs Interstate75W. GPIO23 which is used for boot button in Interstate, is the WIFI_ON pin on Interstate W, so we should not be touching that.

[ZodiusInfuser]

https://github.com/pimoroni/pimoroni-pico/tree/main/libraries/interstate75

[ZodiusInfuser]

Thanks. I suggested some edits. It could also do with the updates to the C++ definitions and readme too: https://github.com/pimoroni/pimoroni-pico/tree/main/libraries/interstate75 i.e. the addition of static const uint8_t BOOT = 23; to the header

[Gadgetoid]

There must be a way to auto-detect that the code is running on a Pico W, rather than relying upon user testimony?

[ZodiusInfuser]

Since we have Pico W and Non-W builds, we could be evil and swap out which version of interstate75 gets baked in.

[ageeandakeyboard]

It makes sense but then we i'll need to have two differently named modules.

[Gadgetoid]

I think the user-facing logic here can be replaced with "Pico W" in sys.implementation._machine, I might grab/rebase this with that change to keep it fresh.

[Gadgetoid]

@ageeandakeyboard if you still have i75 and i75w boards to hand, could you see if this works please?

[ageeandakeyboard]

@Gadgetoid This works great with i75 and i75w the self.interstate75w variable detects correctly and the wifi is running fine on the i75w.
Tested with:
buttons.py
clock.py