Porting A2B functionality to other ARM platforms

Hello.

Please make a screenshots of TDM/I2S settings on each node.

Thank you for your reply, The configuration is as follows

Main Node

Subordinate Node 0

Subordinate Node 1

Hello.

Try to change setting of TDM on Master from "TDM8" to "TDM2".

WBR!

Sorry, the test is still failed.

Try to change setting "stream_0": only ONE destination - Master.

Sorry, the test is still failed.

Is there documentation on how to send A2B Slave data to SOC?

www.analog.com/.../AD242x_TRM_Rev1.1.pdf

Hi 

I2S/TDM settings predominantly should be aligned correctly between the Host and A2B Master. Here are few recommendations from A2B team:

--> TDM interface operates independently on Master and Slave nodes. So the TDM settings can be different at both ends, but the interfaced devices settings must match. 

Check the TDM settings between A2B Master and Host/SoC. Make sure the following settings are aligned correctly in your SW:

• TDM mode (TDM2/TDM4/TDM8/TDM16/TDM32) – should be same between SoC and A2B Master
• TDM channel size (16-bit/32-bit) - should be same
• Invert SYNC (Falling edge or rising edge) - should be same
• Early SYNC (1Bit delay / No delay) - should be same
• ALT SYNC (Pulse mode SYNC or 50% Duty cycle SYNC) - should be same
• Driving/Sampling edge settings : for e.g. If a signal (Data and SYNC) is driven at rising edge of BCLK, it must be sampled at opposite edge of BCLK (i.e. at falling edge of SYNC) at the interfaced device.

On the MIC Subordinate Node, since it is just a microphone node, all we need to take care is regarding the clock to PDM Microphones. The clock to PDM microphone should be 3.072 MHz. It can be sourced either from PDMCLK/I07 pin of A2B or it can be through BCLK which in turn should be set as TDM2 which generates 3.072 MHz clock. Please ensure you enable/select the correct clock line either IO7/BCLK in your slave configuration settings that is going to your microphones.

Please try above and let us know if it works for you. 

Best Regards, Swaroop.