SPI Protocol pattern used for communicating between rpi and the bridge

I am working on RTLS using MDEK kit. I am successfully able to achieve as per the quick start guideline and also the gateway part is successfully done.
As raspberry pi is host and dwm1001 is a slave , both are communicating using SPI.
I want to know about what data are being exchanged between rpi Master and DWM1001 slave. This would be of great help in connecting dwm1001 bridge to host other than rpi.
Kindly suggest.