Multiple HDL Constraints Files

BP
Brian Padalino
Tue, Mar 16, 2021 3:09 AM

Are multiple HDL constraints files (xdc files for Vivado) supported?

I want to have my IO fixed and placed, but have a different xdc for timing
based on what I am building.

Is this supported, or should I just put everything into a single xdc file?

Thanks,
Brian

Are multiple HDL constraints files (xdc files for Vivado) supported? I want to have my IO fixed and placed, but have a different xdc for timing based on what I am building. Is this supported, or should I just put everything into a single xdc file? Thanks, Brian
JK
James Kulp
Tue, Mar 16, 2021 11:41 AM

We are lookiing at this for 2.2, but remember that the Vivado constraint files are TCL and thus can be "included" by one another.

A platform has a default constraint file, and platform configurations and HDL containers can also indicate constraint files.

But there is only one used to build the bitstream at this point.

On 3/15/21 11:09 PM, Brian Padalino wrote:

Are multiple HDL constraints files (xdc files for Vivado) supported?

I want to have my IO fixed and placed, but have a different xdc for timing based on what I am building.

Is this supported, or should I just put everything into a single xdc file?

Thanks,

Brian

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