i.MX RT Crossover MCUsのトピックRe: 【MIXMRT1061DVL6B】AVB Daisy chain connection of MIXMRT1061DVL6B

【MIXMRT1061DVL6B】AVB Daisy chain connection of MIXMRT1061DVL6B

bobhi009 — Wed, 11 Aug 2021 01:11:20 GMT

Hello;

Does the two Ethernet controller of MIXMRT1061DVL6B with support for IEEE1588 support daisy chain connection , to transmit audio data and control data。

Re: 【MIXMRT1061DVL6B】AVB Daisy chain connection of MIXMRT1061DVL6B

kerryzhou — Wed, 11 Aug 2021 05:35:56 GMT

Hi @bobhi009

RT1061 contains 2 ethernet, normally, one ethernet connect to one PHY, then connected externally to the ethernet interface.

I am not sure which detail daisy chain connection you mentioned, do you want to connect two ethernet pin together without the PHY? Then do the 2 ENET communication in one R1061 chip? Can you draw one simple picture about your desired connection? Thanks.

best Regards,

Kerry

Re: 【MIXMRT1061DVL6B】AVB Daisy chain connection of MIXMRT1061DVL6B

bobhi009 — Wed, 11 Aug 2021 06:44:13 GMT

kerry：

thanks for your replay. I want to make a device like the picture show, the pc can play a sound with the usb , And all device can play it to speaker, and all device pdm mic can be captured by PC with USB.

Re: 【MIXMRT1061DVL6B】AVB Daisy chain connection of MIXMRT1061DVL6B

kerryzhou — Wed, 11 Aug 2021 06:59:57 GMT

Hi @bobhi009 ,

I think you still need to connect the PHY, Dev1_ENET1->PHY->PHY->Dev2_ENET2, I think this method should be OK, as it is mainly using the enet to do communication between the different RT chip, if just pin to pin connection between the different RT chip, I think that is not supported.

To the USB, it's OK to use it.

Best Regards,

kerry

Re: 【MIXMRT1061DVL6B】AVB Daisy chain connection of MIXMRT1061DVL6B

bobhi009 — Wed, 11 Aug 2021 07:13:58 GMT

kerryzhou：

Yes ,need to connect the PHY. the other question is do we need additional third-party libraries to achieve audio synchronization between different devices? Is there any reference material？And I noticed that this chip does not have a DMIC interface， Do you need to use SPI to simulate receiving PDM data, and then do the PDM to PCM conversion on the software？Any suggestions in this ？

Re: 【MIXMRT1061DVL6B】AVB Daisy chain connection of MIXMRT1061DVL6B

kerryzhou — Wed, 11 Aug 2021 07:19:55 GMT

Hi @bobhi009

All the audio code, you can find it in the SDK USB area, or the sai driver project. we didn't provide 3rd part lib.

Yes, no directly DMIC, RT600/500 contains it. Normally, to record the audio, we use the I2S in the SAI module.

Wish it helps you!

Best Regards,

Kerry