Forum Post: ADS1299 SPI Interface

Hi,

I am trying to use an Arduino UNO and Xilinx Spartan 3E FPGA board to communicate with the ADS1299 Eval board via SPI. However, I am just reading a bunch of 1s in all my registers. Upon checking my SCLK line, seems that it is not 50% duty cycle (as attached). I am wondering if this is the cause?

Looking forward to receive some help from the community!

Regards,

Inez