Raspberry Pi 4 Pinout

[ccoenen]

Here is a reference that is said to be the RPi4's Pin mapping including alternate uses:

(This was found by a friend of mine who posted it on twitter)

[lurch]

RPi-Distro/raspi-gpio@80fa7d0 is an "official" source of the Pi4 pinout information (which uses BCM-ordering rather than the physical-ordering used above).

[shimaore]

I suspect the official source is the datasheet (page 10) on the Pi website. :)

I would have a go at editing src/en/template/pinout.yaml but I'm not sure how the site is supposed to deal with competing Alt values — for example GPIO 4 (pin 7) Alt 4 is currently "AVEIN VID0" but is "TXD3" on the Pi4.

Maybe some new code is needed to handle the Pi4 properly on the site?

[lurch]

https://www.tomshardware.com/reviews/raspberry-pi-gpio-pinout,6122.html shows one possible way of displaying the multiple Pi4-only functions 🤷‍♂️

[ccoenen]

I find this rather hard to read, to be quite frank.

[patrickelectric]

hey beautiful people, is there any update related to this issue ?

[Gadgetoid]

This has been languishing for a while and clearly needs some kind of fix.

Perhaps we need to separate individual board alt functions in the json and display them on the website somewhat like this (very rough example):

[lurch]

That table might be easier to read if it only showed where the Pi4 was different, rather than duplicating the majority of the entries which are the same? 🤷‍♂️
Also, you'll obviously need to use a different label than "Pi 3" because people will wonder what functions the Pi 2 or Pi Zero uses 😉

[seamusdemora]

@lurch :

https://www.tomshardware.com/reviews/raspberry-pi-gpio-pinout,6122.html shows one possible way of displaying the multiple Pi4-only functions

I also thought this was reasonable, but some things struck me as possibly incorrect:

• SDA3 appears on pins #3 and #7
• SCL4 appears on pins #21 and #26
• etc

But as a format, it works OK.

[lurch]

I also thought this was reasonable, but some things struck me as possibly incorrect:
[snip]

That's actually correct, see e.g. https://elinux.org/RPi_BCM2711_GPIOs (although note that eLinux is a non-authoritative reference 😉 )

[seamusdemora]

Yes! I realized that a few hours after posting this comment, and failed to follow up - all part of the GPIO musical chairs!