Free Range VHDL Bryan Mealy, Fabrizio Tappero
©
Free Range VHDL Copyright 2013 B. Mealy, F. Tappero Release: 1.17 Date: 21 June 2013 Book size: 160 mm by 240 mm Pages: approx. 190
The electronic version of this book can be downloaded free of charge from: http://www.freerangefactory.org The authors have taken great care in the preparation of this book, but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for incidental or consequential damages in connection with or arising out of the use of the information or programs contained in this book. This book is licensed under the Creative Commons Attribution-ShareAlike Unported License, which permits unrestricted use, distribution, adaptation and reproduction in any medium, provided the original work is properly cited. If you build upon this work, you may distribute the resulting work only under the same, similar or a compatible license. To view a copy of this license, visit: http://creativecommons.org/licenses/by-sa/3.0/
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Cover and Artwork by Robert Ash.
To everyone who helped
Table of Contents
Acknowledgments
ii
Purpose of this book
1
1 Introduction To VHDL 1.1 Golden Rules of VHDL 1.2 Tools Needed for VHDL Development
5 8 8
2 VHDL Invariants 2.1 Case Sensitivity 2.2 White Space 2.3 Comments 2.4 Parentheses 2.5 VHDL Statements 2.6 if, case and loop Statements 2.7 Identifiers 2.8 Reserved Words 2.9 VHDL Coding Style
11 11 11 12 12 13 13 14 15 15
3 VHDL Design Units 3.1 Entity 3.2 VHDL Standard Libraries
17 18 22
ii
3.3 3.4 3.5 3.6
Architecture Signal and Variable Assignments Summary Exercises
23 23 25 26
4 VHDL Programming Paradigm 4.1 Concurrent Statements 4.2 Signal Assignment Operator “
