You're reading from FPGA Programming for Beginners Bring your ideas to life by creating hardware designs and electronic circuits with SystemVerilog

Product type Paperback

Published in Mar 2021

Publisher Packt

ISBN-13 9781789805413

Length 368 pages

Edition 1st Edition

Languages

Assembly

Tools

FPGA

Concepts

Embedded Systems

Author (1):

Frank Bruno

View More author details

Table of Contents (16) Chapters

Preface

1. Section 1: Introduction to FPGAs and Xilinx Architectures

2. Chapter 1: Introduction to FPGA Architectures and Xilinx Vivado FREE CHAPTER

3. Section 2: Introduction to Verilog RTL Design, Simulation, and Implementation

4. Chapter 2: Combinational Logic

5. Chapter 3: Counting Button Presses

6. Chapter 4: Let's Build a Calculator

7. Chapter 5: FPGA Resources and How to Use Them

8. Chapter 6: Math, Parallelism, and Pipelined Design

9. Section 3: Interfacing with External Components

10. Chapter 7: Introduction to AXI

11. Chapter 8: Lots of Data? MIG and DDR2

12. Chapter 9: A Better Way to Display – VGA

13. Chapter 10: Bringing It All Together

14. Chapter 11: Advanced Topics

15. Other Books You May Enjoy

Project 7 – Using fixed-point arithmetic in our temperature sensor

Let's take a look at how we can optimize our temperature averaging to handle the 16 seconds where the temperature is incorrectly calculated. This happens because we are dividing an invalid temperature over the first 15 clock cycles.

There are cases where either a delay or inaccurate results can't occur. I was actually asked a job interview question regarding how to make sure that the output from this type of filter was valid during the bring-up time, so this really is a practical question that you may need to address someday.

Using fixed-point arithmetic to clean up the bring-up time

First, let's take a look at what a fixed-point scaling factor looks like. In the end, we want to scale to that of a single value from the sensor. To do this, we want to scale by a fraction. The following table shows the first 15 cycles, plus the steady state of the accumulator. I've populated the following...