Graphic Editor: Creating a Hierarchical Design

This example describes how to create a hierarchical design using the Graphic Editor. This design is functionally equivalent to AHDL: Creating a Hierarchical Design. The top-level file, top.gdf, calls the two lower-level files bottom1.gdf and bottom2.gdf. See the figures below.

You must create the symbol files bottom1.sym and bottom2.sym so that the lower-level files can be instantiated into the top level. To create the symbol files:

1. Open one of the lower level files (bottom1.gdf or bottom2.gdf)
2. Specify the project name by choosing the Set Project to Current File command (File menu).
3. Choose Create Default Symbol (File menu). MAX+PLUS II creates the .sym file.

Download the Graphic Editor files used in this example:

• Download bottom1.gdf
• Download bottom2.gdf
• Download top.gdf

The use of this design is governed by, and subject to, the terms and conditions of the Altera Hardware Reference Design License Agreement.

For more information on using this example in your project, go to:

• How to Use Graphic Editor Examples
• AHDL: Creating a Hierarchical Design
• MAX+PLUS II Help

Design Examples Disclaimer

These design examples may only be used within Altera Corporation devices and remain the property of Altera. They are being provided on an “as-is” basis and as an accommodation; therefore, all warranties, representations, or guarantees of any kind (whether express, implied, or statutory) including, without limitation, warranties of merchantability, non-infringement, or fitness for a particular purpose, are specifically disclaimed. Altera expressly does not recommend, suggest, or require that these examples be used in combination with any other product not provided by Altera.