GPIO pins used by the Octo

Moderator: flatmax

tha-poke
Posts: 9
Joined: Tue May 02, 2017 8:38 pm

Re: GPIO pins used by the Octo

Post by tha-poke » Thu May 04, 2017 4:33 am

This is why I got a second one! I'll give it a try sometime soon.

Is there a schematic or pcb diagram online somewhere? Also would be good to know exactly which pins are used for ground and power.

Thanks

nik
Posts: 5
Joined: Thu Apr 27, 2017 9:02 pm

Re: GPIO pins used by the Octo

Post by nik » Mon May 15, 2017 10:23 pm

tha-poke wrote:Also would be good to know exactly which pins are used for ground and power.
+1

Nik

flatmax
Posts: 609
Joined: Sat Jul 23, 2016 11:39 pm

Re: GPIO pins used by the Octo

Post by flatmax » Tue May 16, 2017 4:23 pm

For gound and power, consider that most/all of the ground pins are used. They all connect to the same ground plane.
For power, the two 5V pins are used (pins 2 and 4), also pin 17 (3.3V) is used.

thanks
Matt
Check out our audiophile quality crossovers : https://bit.ly/2kb1nzZ
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tha-poke
Posts: 9
Joined: Tue May 02, 2017 8:38 pm

Re: GPIO pins used by the Octo

Post by tha-poke » Sat May 20, 2017 10:14 pm

Are these the tracks to cut?
track-cuts-23-&-24small.jpg
track-cuts-23-&-24small.jpg (26.59 KiB) Viewed 4715 times
track-cuts-19&20small.jpg
track-cuts-19&20small.jpg (34.45 KiB) Viewed 4715 times

flatmax
Posts: 609
Joined: Sat Jul 23, 2016 11:39 pm

Re: GPIO pins used by the Octo

Post by flatmax » Mon May 22, 2017 7:21 pm

Yes, those look like the correct lines to cut.

Matt
Check out our audiophile quality crossovers : https://bit.ly/2kb1nzZ
Please review the Zero sound card on Amazon USA : https://www.amazon.com/dp/B075V1VNDD
---
Check out our new forum on github : https://github.com/Audio-Injector

widdly
Posts: 8
Joined: Fri Jul 21, 2017 10:15 am

Re: GPIO pins used by the Octo

Post by widdly » Fri Sep 08, 2017 9:39 am

Any update on this? Do the SPI interfaces work while the Octo is connected? Is the HW mod required?

I am waiting on an Octo and my plan was to use it in conjuction with some spi adc's for interfacing potentiometers.

flatmax
Posts: 609
Joined: Sat Jul 23, 2016 11:39 pm

Re: GPIO pins used by the Octo

Post by flatmax » Thu Sep 14, 2017 9:53 pm

Give it a test, however the fallback is to cut the lines.

Matt
Check out our audiophile quality crossovers : https://bit.ly/2kb1nzZ
Please review the Zero sound card on Amazon USA : https://www.amazon.com/dp/B075V1VNDD
---
Check out our new forum on github : https://github.com/Audio-Injector

tha-poke
Posts: 9
Joined: Tue May 02, 2017 8:38 pm

Re: GPIO pins used by the Octo

Post by tha-poke » Fri Sep 22, 2017 4:21 am

Cutting the tracks worked for me

widdly
Posts: 8
Joined: Fri Jul 21, 2017 10:15 am

Re: GPIO pins used by the Octo

Post by widdly » Tue Sep 26, 2017 12:05 pm

I'm running a TFT lcd off the spi with the Octo sound card running. I didn't need to modify the board to get it to work.
:D

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