I've been able to send I2S stereo audio from a AD1401 eval board to a AD1940d board by connecting them as described in
Now I'd like to try sending TDM audio across the same interface, but cannot make it work. As far as I can tell, the wiring between the boards as well as the boards' jumper settings remain the same for I2S and TDM. After setting both chips' register controls for TDM, I find that the -1401 board is not sending any data to the -1940 board.
I attached the project file for each board:
1401 -- Two channels of analog in, straight to two used channels (out of eight) TDM
1940 -- TDM in, two channels out to analog
I'm hoping someone could look at the register settings therein and see what's wrong.