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AD9081 No-OS DAC data source

It looks like the AD9081 no-OS project defaults to using a DDS for the DAC. I'm trying to drive data in real-time from within the FPGA, not via DMA. I thought I would hook my source data to the following interface (highlighted):

I assume this interface is the same one the DMA would use. If so, I also assume I need to set the channels to AXI_DAC_DATA_SEL_DMA. Is this correct and could anyone guide me on where this should be set in the software? The project doesn't appear to have a #define for a DMA example.

Thanks.