I'm programming microcontroller to control the AD7779 development kit via SPI.
I'm trying to read the register of the AD7779. However, the data in the SDO line always 0xFF whenever I sent my read request to the board.
The data in SDI and SCK line are both perfect, I have checked those line by using oscillator. So are there any configurations of the EVAL-AD7779FMCZ board that I should take to recieve the data?
I'm looking forward to seeing the reply.
Thanks for help.