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The HDL Reference Design for each supported Xilinx FPGA board contains a folder called SDK_Workspace which stores the Xilinx SDK project files needed to build the no-OS software and also the .bit files with the HDL design that must be programmed into the FPGA.
These are the steps that need to be followed to recreate the software project:
In SDK folder you'll find the SDK_Workspace folder. Make sure that the path where it is stored does not contain any spaces.
Open the Xilinx SDK. When the SDK starts, it asks you to provide a folder where to store the workspace. Any folder can be provided.
In the SDK select the File→Import menu option to import the software projects into the workspace.
Now the software must be added in your project. For downloading the software, you must use 3 links from Github given in Downloads section. From there you'll download the specific driver, the specific commands and the Xilinx Boards Common Drivers(which are commons for all Xilinx boards). All the software files downloaded must be copied in src folder from sw folder.
Before compilation you have to uncomment the name of the device that you currently use. In the picture below there is an example of this, which works only with AD5629R project. For another device, uncomment only the respective name. You can have one driver working on multiple devices, so the drivers's name and the uncommented name may not be the same for every project.