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i2S external DAC

Posted: Thu Oct 24, 2019 8:36 am
by naguirre
Hi folks,
i'm using right now the LattePanda Alpha as controller of a audiophile DAC.
For that purpose i'm using an USB port of the LattePanda wich used a USB to i2s board (Amanero USB). Everything is working well, but for different reasons, i would like to try the i2s output which is present on the extension connector of the LattePanda Alpha.

I read a little bit about the m3-7Y30 and the KabyLake architecture and more precisely this document provided by intel : ... -vol-1.pdf

It seems that the processor has 3 differents i2s controller. One shared with the HDA output. I guess that the HDA is actually used for the analog part of the LattePanda and connected to ALC269VC codec. So there is still 2 others I2S bus on the CPU.
Is the document aligned with the revision of LattePanda's Alpha processor ?
Which i2s port is connected to the extension connector ?
Do you have any idea on an existing Li,ux driver for the i2s output ?

It would be interresting to have i2s audio working for connecting lattepanda with different audiophile diy dac boards.


Re: i2S external DAC

Posted: Sun Dec 08, 2019 5:26 pm
by naguirre
no idea ? anyone ?

Re: i2S external DAC

Posted: Mon Dec 09, 2019 9:58 am
by calpin
You're right.
I2S_0/HDA is used on ALC269
I2S_1is WiFi
So, the breakout connectors are from I2S_2.
If you plan to use on your own I2S device, please careful the operation voltage.