www.tinhgiac.com Allegro Constraint Manager User Guide Generating and Viewing Constraints Differences

Allegro® Constraint Manager User Guide 8 Generating and Viewing Constraints Differences Topics in this chapter include Generating Constraint Difference Report Viewing Constraint Differ

Allegro® Constraint Manager User Guide

8

Generating and Viewing Constraints

Differences

Topics in this chapter include

Generating Constraint Difference Report

Viewing Constraint Difference Report

Representing Constraint Difference

Generating Constraint Difference Report

Managing design difference is critical to deliver a quality product with today's complex

PCB/SIP designs Design differences include connectivity (logical), implementation (physical), and constraint changes

Comparing Constraints using Differencing Utility

A utility is provided to compare two databases for constraint differences You can select any of the listed databases and compare them for constraint differences:

Schematic database (.cpm)

Layout database (.brd, sip, mcm)

Constraints Manager Database (.dcf, tcf)

This utility also compares

two different versions of the schematic databases

two different versions of the layout databases

the schematic database with the layout database

To compare the constraints, complete the following steps:

1 Run command cmDiffUtility

The Cadence Constraints Differencing Utility dialog box is displayed

2 Click the browser button to select the databases

The file selection dialog box is displayed The files are displayed based on the file type filter

By default the filter is set to Constraints Files (.dcf,.tcf)

3 Click Compare Files.

The comparison starts and a report is generated

Comparing Constraints using Allegro PCB Designer

You can compare constraint values from technology files in Allegro PCB Designer

To generate the Constraint Differences, complete the following steps:

1 Choose File - Import - Constraints or File - Import - Technology file

2 The Import Constraints dialog box is displayed Select Report Only check-box for

generating the constraint difference report

3 Choose and open the dcf file to compare.

The Constraint Report is displayed

Viewing Constraint Difference Report

You can open the report in a built-in report viewer

The report viewer supports a simple, intuitive graphical user interface for displaying constraint differences between the two databases.This viewer consists of a toolbar, and view window

Report Viewer Toolbar

The figure below displays the report viewer toolbar

The table below describes the function of each tool button

Table 8-1 Constraint Difference Report: Toolbar Description

Previous Selection shows previous view of the report

Next Selection shows next view of the report

Export report to HTML export report as HTML page

Print Preview shows printer-friendly view of the report

Exporting Report as HTML

You can export to share the constraint difference report as an HTML page

1 Choose Export report to HTML from toolbar.

The Export Report dialog box is displayed

2 Browse the directory to save the exported.

3 Specify the report folder name and choose OK.

The HTML page of the report is generated

Note: You can open the HTML report page in any browser

Printing Report

To print the report complete following steps:

1 Choose Print Preview from the toolbar.

The printer view is displayed for review

2 Choose Send to printer for printing the report.

Representing Constraint Difference

The Constraint Difference Report viewer is a two-frame, tree-view based representation You can navigate in the report by using following modes:

By Tree-view shows summary of the selected node in the tree-view

By following Links shows summary of an object when selected the object name

link

By previous and next selections show selections made forward and backward in the report

viewer

Viewing per-layer and array Changes

The Constraint Difference Report for per -layer changes is displayed

View Modes

There are three viewing modes:

Status/Summary only (S) Shows description only with the number of changes

Differences only(D) Shows Destination and Source constraints for each attribute

Unchanged layers are not shown

All values(A) Shows constraint at Destination and Source for all layers

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