DWM3000 with arduino

Hello, I am trying to connect arduino and dwm 3000 with the help of your API from the official website, but there is no file called deca_interface.c. Could anybody send it, please, or, if you have done the things presented in this file yourself, please also send them.

Hi, I am also busy with a similar project. Did you manage? I need some help in increasing the range of my modules