ADAS1000SDZ interfacing through SPI issue

I'm trying to interface the ADAS1000 eval board with the SAM E54 Xplained Pro Eval board. 

I took the below No OS driver code and added its functions and program flow into my project.

https://wiki.analog.com/_media/resources/tools-software/uc-drivers/renesas/adas1000_rx62n.zip

In the Init part I'm setting the SPI parameters. doing software reset, Setting Inactive Frame Words as 0 and setting the frame rate.

Then I'm trying to read the CMREFCTL register using the "ADAS1000_GetRegisterValue" function. The register value always returns as 0.

MCU Eval Board: SAM E54 Xplained Pro

AFE Eval board: ADAS1000SDZ

SPI Configurations:

• SPI Data order - MSB first
• SPI Speed - 1,300,000 Hz
• Data character size - 8 bits
• Phase - Data sampled on leading edge and changed on trailing SCK edge
• Polarity - SCK is high when idle

Framerate set is 2KHz.

Kindly, help me sort this issue. Thanks