GPIO pins used on the audio injector sound card

vanmanda · Post by **vanmanda** » Fri Oct 13, 2017 10:40 pm

Hi,

We are having a strange problem reading GPIO-port while the AudioInjector card is installed.
With the AudioInjector removed we can read GPIO 5 - 6 - 12 - 13 - 16 - 26 without any problem.
Once we install the AudioInjector GPIO 5 - 6 and 12 keep working, but we are no longer to read changes of GPIO 13 - 16 - 26.
According to this thread, this however shouldn't be a problem.
Can you please advice?

Thank you !

flatmax · Post by **flatmax** » Thu Oct 19, 2017 8:38 pm

OK, not really sure what would be causing these problems.

Do you have a audio injector zero handy ? I would be interested to know if you find the same problem with that card.

Matt

vanmanda · Post by **vanmanda** » Sun Oct 22, 2017 7:12 am

We replaced the card and now the problem is resolved.
We replaced it because we one line in channel wasn't working and not to resolve the gpio problem. But a new Card resolved both problems. Thanks for you support.

omnyacoustics · Post by **omnyacoustics** » Wed Dec 13, 2017 4:44 am

Does the pin diagram apply for both the standard and zero models?

omnyacoustics · Post by **omnyacoustics** » Wed Dec 13, 2017 6:38 am

I have a display (See https://www.amazon.com/gp/product/B0756 ... UTF8&psc=1)

It apparently uses PINS 38 and 40 for controlling RED in the screen (See https://1drv.ms/x/s!AsSs9wiJtoNhbHOGKs1UxQhmXNw)

Is it possible to reroute the audio injector sound card to another set of GPIO pins on the Pi? Maybe if I could change something in the drivers you wrote for the card? I'd be happy to help make code changes. If this is possible, maybe you could provide a command line interface input for manually changing the desired GPIO pins through some environment variable or the like? It would open up a lot of possibilities for using the audio injector card in parallel with all sorts of other Pi hats and projects (financial incentive?)

.

omnyacoustics · Post by **omnyacoustics** » Wed Dec 13, 2017 6:40 am

I should have also mentioned in my last post, that I would have to reroute the hardware myself through some GPIO header breakouts and rewiring, but that shouldn't be much of an issue compared to the coding part.

m01101101 · Post by **m01101101** » Thu Dec 19, 2019 10:27 pm

flatmax wrote: ↑
Fri Jul 29, 2016 8:44 am
The AISC uses the I2S pins for communicating audio data to and from the Raspberry Pi. Thses pins can not be shared amoungst add ons and hats when the AISC is in use.

So it cannot be used stacked with an amp HAT (IQaudio/HifiBerry/JustBoom/Allo/AudioPhonics)? I think they also use I2S pins.

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