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McASP single channel TDM output not working.

Expert 2875 points

Hi,

We have an existing system that passing audio using I2S through McASP is working well.

Now I changed it to TDM (8 time slots), using one active serializer and one acctive TDM channel.  It does not work.

I see data in receive DMA buffer.  We copies the data to transmit DMA buffer.  But I don't see data in output serializer by scope.   The output serializer control register has value 0x00000011.  I can see transmit DMA is continuously moving data from the buffer to McASP.

What might be the problem?

Thank you.

Regards,

Steve