[AudioI] free pins on top of Octo to add control

[Matt]

Hi,

Awesome artworks mate !

Yes some GPIOs are being used.

The device tree is a good place to start to look : 
https://github.com/raspberrypi/linux/blob/rpi-4.19.y/arch/arm/boot/dts/overlays/audioinjector-addons-overlay.dts

For codec controls :
pins : 13, 15, 16, 18, 29
GPIOs : 27, 22, 23, 24, 5

The sound card also uses the I2S gpios : 18, 19, 20, 21

I2C is shared with other applications GPIO : 2, 3

Then the other shared pins are the GND and power pins.

Matt

On 30/4/20 9:49 am, Alberto Novello via People wrote:
> HI Matt / Everyone,
>
> Haven't received the Octo yet but I'm trying to gain some time to fix 
> another part of my prototype which concerns Pots and Buttons. From the 
> pictures the Octo seems to plug on top of all the pins of the 
> Raspberry Pi but also makes them available on top. I assume some are 
> being used by the Octo, so I would like to know which pins are then 
> available to attach pots and buttons?
> Thanks
>
>
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