Book Image

FPGA Programming for Beginners

By : Frank Bruno
5 (1)
Book Image

FPGA Programming for Beginners

5 (1)
By: Frank Bruno

Overview of this book

Field Programmable Gate Arrays (FPGAs) have now become a core part of most modern electronic and computer systems. However, to implement your ideas in the real world, you need to get your head around the FPGA architecture, its toolset, and critical design considerations. FPGA Programming for Beginners will help you bring your ideas to life by guiding you through the entire process of programming FPGAs and designing hardware circuits using SystemVerilog. The book will introduce you to the FPGA and Xilinx architectures and show you how to work on your first project, which includes toggling an LED. You’ll then cover SystemVerilog RTL designs and their implementations. Next, you’ll get to grips with using the combinational Boolean logic design and work on several projects, such as creating a calculator and updating it using FPGA resources. Later, the book will take you through the advanced concepts of AXI and show you how to create a keyboard using PS/2. Finally, you’ll be able to consolidate all the projects in the book to create a unified output using a Video Graphics Array (VGA) controller that you’ll design. By the end of this SystemVerilog FPGA book, you’ll have learned how to work with FPGA systems and be able to design hardware circuits and boards using SystemVerilog programming.
Table of Contents (16 chapters)
1
Section 1: Introduction to FPGAs and Xilinx Architectures
3
Section 2: Introduction to Verilog RTL Design, Simulation, and Implementation
9
Section 3: Interfacing with External Components

Project 6 – Using the temperature sensor

The Nexys A7 board has an Analog Device ADT7420 temperature sensor. This chip uses an industry-standard I2C interface to communicate with. This two-wire interface is used primarily for slower speed devices. It has the advantage of allowing multiple chips to be connected through the same interface and be addressed individually. In our case, we will be using it to simply read the current temperature from the device and display the value on the 7-segment display.

Our first step will be to design an I2C interface. In Chapter 7, Introduction to AXI, we'll be looking at designing a general-purpose I2C interface, but for now, we'll use the fact that the ADT7420 comes up in a mode where we can get temperature data by reading two locations. First, let's take a look at the timing diagram for the I2C bus and the read cycle we'll be using:

Figure 5.10 – I2C timing

We can see from the timing...