Constraints Bus Members Generation

You can choose a constraints delimiter format for a specified constraints type. To display the Constraints Bus dialog, click Setup > Settings + Constraints Bus Members Generation (the dialog is shown in Figure 11-6).

Figure 11-6. Constraints Bus Dialog: Default Values

The File Type column lists the type of constraints file. The Slice Format column shows the current format associated with the file in the adjacent field. Slice format determines the type of delimiters to be used for presenting constraints (for example, writing them to a file).

Initially, default settings populate the dialog table. A row highlighted in bold, indicates the format in the Slice Format column has been changed. When changes are applied, only changed settings are written to the local settings file (the IODesigner.xml file). Unchanged rows (that is, default rows) are always read from global settings.

To change a value, highlight the row, click the down arrow to display a drop-down list, and select the appropriate value. Click Apply to apply the new value and leave the dialog open or OK to save the new value and close the dialog. Figure 11-7 shows a modified entry (Lattice - PRF).

Figure 11-7. Constraints Bus Dialog: Modified Defaults

The default values can be restored selectively by choosing the appropriate value for a specific row. To restore all slice formats to their default values, click Default.

Some constraints delimiter formats can be set to Automatic. This option tells the system to determine the slice format from the appropriate database settings (for example, for a specific vendor or language option).