Extension port documentation unclear

[piit79]

In the Build your own extension of the Extension port documentation (source file), it says

Using a standard RJ-11 connector, it provides power, I2C, and GPIO pins...

(emphasis mine). However, the "Extension Port Pinout" right underneath only shows power (3.3 V and 5 V) and UART pins - no I²C or GPIO.

Which is it then? Either the mention of the I²C and GPIO pins should be removed, or the extension port pins better documented. But it seems there are no pins that could provide I²C/GPIO (there's only one extra pin marked NC), so probably the former.

Please let me know if you want me to open a PR.

[Nevexo]

Those pins will just be muxed on the chip so could be changed in software to be either common GPIOs, i2c or UART.

It's not yet easily configurable, but should be once the extension infrastructure has been improved.

[piit79]

OK, that makes sense. Glad to hear there are plans to improve the extension infrastructure - it feels very limited as it is now, especially the apparent "just one extension at a time" limitation (both in hardware and software).

Anyway, it might be good to add this clarification to the documentation page - is it OK to open a PR?

[Nevexo]

You're more than welcome to open a PR