EV-RADAR-MMIC2 with ADF5901 Tx-TDD

Hi,

I am using EV-RADAR-MMIC2 to evaluate ADF5901, ADF5904 and ADF4159. I would like to do TDD with two Tx of ADF5901. I can see in order to switch the transmitters, I need to change the value of register R0. How can I achieve it automatically without accessing through GUI?

Thanks