The following content has been imported from Legacy Help systems and is in the process of being checked for accuracy.
Parent process: EditConstraints:AddConstraint
Applied parameters: Type=Part
Summary
This command is used to add or modify a constraint group targeting a specific part, within the active constraint file.
Details
First, ensure that the constraint file whose Part constraint group you wish to add or modify, is open as the active view in the main design window.
After launching the command, the
Choose Physical Device dialog will appear. Use this dialog to choose the particular device you wish the current constraint file to target (or a different device if one is already targeted in the file).
If you are adding the Part constraint group to the file, clicking
OK after you have chosen the device you wish to target will close the dialog and add the constraint group statement to the constraint file. The statement will appear in the following form:
Record=Constraint | TargetKind=Part | TargetId=Chosen Device (e.g. XC2S300E-6PQ208C)
If you are modifying an existing Part constraint group, clicking
OK after you have chosen the substitute device will close the dialog and the corresponding constraint group statement will be updated with the new device.
Notes
A constraint group is a single statement in a constraint file, targeting one or more objects and containing one or more specific constraints.
A constraint file can only target one physical FPGA device.
When adding the Part constraint group for the first time, the entry will appear below any other constraint group statements, where they exist, otherwise it will be the first statement following the header section of the file.
When modifying an existing Part constraint group, the text cursor can be placed anywhere within the document - you do not have to place the cursor within the relevant line for the statement.
The Part constraint group can be added/modified by typing directly within the constraint file.
For more information about constraint files, refer to the application note 'Design Portability, Configurations and Constraints' and the 'Constraint File Reference', both of which can be found in the main FPGA Design section of the Help System.