BBB audio processing using a costume Audio sheild

Thread Starter

samer.13

Joined Mar 9, 2022
2
Hello guys,
So I have a question, Im developing an Audio sheild for the Beagle bone black that has (a microphone+ PCM1804 ADC+ PCM 1781 DAC+ a couple of audio jacks)
so I made the ciruite and its on the way now, my next job is to do the embedded Linux Hardware defintion and device trees, no thats a whole new world for me so Im trying my best.
My main problem is the I2S how am I supposed to let it know that im using pcm1804 for example, and what do I need to add to the bbb device tree so it would know ok the sound is coming through the microphone to the ADC to the I2S and then to the am335x and so on.
I cant seem to find a tutorial about I2S specifacly getting used with an external ADC that is supposed to get connected to the BBB.
As you can see in the screen shot, I definded the pins number 28 and 30 with axr2 and axr0 and they are resposible for the data pins form PCM1804 and PCM 1781 respectivly.
So any help on the subject of BBB and I2S would be much appreciated :)

Best regards
Samer
 

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