AR# 4715: Foundation F1.4, F1.5: Constraints in UCF appear to be ignored after copying project in Foundation
AR# 4715
Foundation F1.4, F1.5: Constraints in UCF appear to be ignored after copying project in Foundation
描述
KEYWORDS: constraints, ucf, copy project, new location
URGENCY: standard
PROBLEM DESCRIPTION: Some customers may find that after copying a project and giving it a new name in Foundation, their design constraints appear to be ignored.
This is due to the fact that on copying a project using the File-> Copy Project command from the Project Manager, the old UCF file is copied to the new location, but a new constraints file of the same name as the new project is also created. This new constraints file contains examples of constraints which are all commented out.
By default the Xilinx Design Manager will pick up a constraints file of the same name as the input netlist.
In other words, the new, empty constraints file will by default be selected above the proper constraints file copied over from the original project.
解决方案
1
RESOULTION 1:
In the design manager, check that the original constraints file is listed in the Implement -> options -> control files (constraint file) section.
2
RESOLUTION 2:
Copy the constraints from the original UCF file into the new UCF file and remove the original constraints file (if wished) from the new project.