I am trying to talk to the AD9361 demo board thru the SPI port but I get no output from the DO pin. From the documentation
on power up I should be able to send continuous clocks on the SPI clock line and see register 0 output start on the 17th clock.
I have the enable pin always low. I am connected with a ZEDBoard thru the FMC connector with the interface voltage set to 1.8v.
I can see the SPI clocks at the terminating resistor on the demo board. Looking at the SPI output it is always is in the Hi Z state.
Is there something that I need to enable to get this interface to work?