Adding ADC channels wth TDM

Following up on my previous threads. My goal is to add two channels of high quality ADC input to a configuration with the ADAU1701,

I have built and tested circuit boards using the following schematic:

The hardware basically works: the DSP downloads and runs programs, such as a simple four-channel function generator.

If I run the following simple program, using the configuration shown, I can see pass through signal from all channel except from channel two of my auxiliary ADC (channel 5 on the USBi). This is independent of the output DAC channel I have selected.

I have found no combination of configurations to the Serial Input that fixes this. However, if I switch the setting of the LRCLK polarity, I can see the output of channel 5 on the USBi, but not of channel 3. Thus, I imagine that this has to do with a problem in DSP frame reads for the TDM input.

I know from previous conversations that the TDM may not be integrated fully into this chip or the associated SigmaStudio code. However, if anyone can offer me guidance to use this input channel I would be very appreciative.

hardware

processors and dsp

Processors and Microcontrollers

adau1701