How to use one sound card with 2 codecs on i.MX6UL?

[chadA]

Hi all,

Now we want to use 2 same codecs on i.MX6UL, the codec chip is TI's TLV320ADC6140.

For one TLV320ADC6140, it supports 4 analog channels, but we need at lease 8 channnels. According to the TLV320ADC6140's introduction, it supports multi devices with shared TDM and IIC bus.

A simple architecture diagram is shown below：

Are there any similar examples for reference?

Thanks

Chad

[Sanket_Parekh · Accepted solution]

Hi @chadA 

I hope you are doing well

Q]Are there any similar examples for reference?

=> For the reference of two codecs with IMX6, please refer to the below community threads.

https://community.nxp.com/t5/i-MX-Processors/Two-audio-codecs-on-an-i-MX6Q/td-p/402168

https://community.nxp.com/t5/i-MX-Processors/Set-two-sound-cards-to-the-same-SAI-Linux-4-9-iMX6UL/m-...

Thanks & Regards,
Sanket Parekh

[chadA]

Dear Sanket,
Thanks for your support.
I have succeeded.
Thanks again and I will use this reply as the result.
Thanks
Chad

[chadA]

Hi @Sanket_Parekh ,

Sorry, it seems that neither link could solve my problem.

For my current situation: I can already sample from 2 sound cards, each sound card has a codec, like the usage in the first link.

However, after testing, we found it will report an unctrolled problem "Overrun" when we use 2 sound cards sample at the same time. Beside, the application also is based on one sound card, it is not a easy work to modify the application too.

So we decided to use one sound card with 2 codecs.

For the second link, I have a question : In a FSYNC period, is it possible to capture the 2 codecs data? Or it still need 2 FSYNC signals for 2 codecs's data? Because I find the 2 codecs use different dai_link.

I expect to be able to sample 2 codecs in one FSYNC period.

Thanks

Chad

[chadA]

Hi Sanket,

Thanks, I will check them and test it.

If I have any further information, I will let you know.

Thanks

Chad