ade7758 SPI aduino

These registers have a default settings use them to verify comms

Are you using the EVAL board or a board you built ? 

I using an eval board make sure you are providing power 

Use a scope and capture spi at the ADE7758 pins . 

Is the crystal running? 

Dave

I am using ade7758 IC not EVAL board.

I can read this 4 values. Is every value now reliable?

everything looks ok so you spi comms are working

If i will use adum1402 for SPI isolation, is it must to change the SPI clock? 

Because i am not getting correct values with this digital isolator.

If i will use adum1402 for SPI isolation, is it must to change the SPI clock? 

Because i am not getting correct values with this digital isolator.

How fast is your spi clk?  Can you verify logic levels with a scope? 

SPI clk is 125000. I am getting only FF output with this digital isolator. With scope i was measure HI (+5V) for 60-65ms. 

You will need to provide a schematic showing how the isolator is connected to the Arduino and the ADE7758