New Feature: Enumerated Values

Upon popular request, airhdl now supports enumerated values for register fields.

Enumerated values are a convenient was to give names to specific field values. As an example, we’ll take a two-bit mode field that is used to control a processing engine. This field supports the following values:

• 0: disabled
• 1: manual
• 2: automatic

To edit a field’s enumerated values, bring-up the Edit Field dialog and activate the Enumerated Values tab:

For each enumerated value, enter the name and the corresponding value in the input fields and click Add:

When you’re done entering all enumerated values for a field, click Save Field:

Once you have done that, airhdl knows about those values and corresponding symbols appear in the generated files. For example, in the generated C header, you’ll find them as preprocessor defines:


Of course, your enumerated values are available in the generated RTL code (VHDL and SystemVerilog) as constants too.

We hope you’ll find them useful.

Published by

Guy Eschemann

Founder and CEO at noasic GmbH.