I am using the AD5683 for the first time. I am also new to SPI. Are there any code examples for writing over the SPI bus? Right now I am trying to write a simple test routine that will change the output voltage, wait 1 second and then change to another output voltage. My output is not responding at all. I am using the AD5683RACPZ-1RL7. I have attached a schematic for reference.