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ADAU1442 XMOS problem


I  am trying to interface an xmos usb to adau1442. My setup is.  Xmos usb connected to serial data input 0 ant serial data out 0 i have an external dac as asynchronous . So far i have tested the output section with a sinewave generator in the schematic and it working fine. The problem is that when i send data through usb xmos i get nothing. I dont know how to procced to this issue.