Embedded SoPC Design with Nios II Processor and VHDL Examples
The book is divided into four major parts. Part I covers HDL constructs and synthesis of basic digital circuits. Part II provides an overview of embedded software development with the emphasis on low-level I/O access and drivers. Part III demonstrates the design and development of hardware and software for several complex I/O peripherals, including PS2 keyboard and mouse, a graphic video controller, an audio codec, and an SD (secure digital) card. Part IV provides three case studies of the integration of hardware accelerators, including a custom GCD (greatest common divisor) circuit, a Mandelbrot set fractal circuit, and an audio synthesizer based on DDFS (direct digital frequency synthesis) methodology.
The book utilizes FPGA devices, Nios II soft-core processor, and development platform from Altera Co., which is one of the two main FPGA manufactures. Altera has a generous university program that provides free software and discounted prototyping boards for educational institutions (details at http://www.altera.com/university). The two main educational prototyping boards are known as DE1 ($99) and DE2 ($269). All experiments can be implemented and tested with these boards. A board combined with this book becomes a “turn-key” solution for the SoPC design experiments and projects. Most HDL and C codes in the book are device independent and can be adapted by other prototyping boards as long as a board has similar I/O configuration.
Why Read This Book
You will get a hands‑on, project‑driven guide to building complete SoPC (system‑on‑programmable‑chip) designs around the Nios II soft processor using VHDL; the book takes you from HDL basics through low‑level drivers to several full hardware/software peripheral examples and accelerator integrations. If you want practical recipes for integrating custom hardware with embedded software on Altera/Intel FPGAs, you will appreciate the clear examples, downloadable code, and real board‑level case studies.
Who Will Benefit
FPGA engineers, embedded developers, and graduate students with some digital logic experience who want to learn practical hardware/software co‑design using the Nios II soft processor and VHDL examples.
Level: Intermediate — Prerequisites: Basic digital logic and synchronous design concepts, familiarity with VHDL (or willingness to pick it up quickly), basic C programming for embedded systems, and some exposure to FPGA toolchains and development boards.
Key Takeaways
- Implement synthesizable VHDL modules for combinational and sequential circuits and map them to Altera/Intel FPGAs.
- Integrate a Nios II soft processor with custom peripherals using SOPC Builder/Qsys and produce a working hardware/software system.
- Develop low‑level C drivers and I/O access routines to interface software with HDL peripherals (PS/2, VGA, audio codec, SD card).
- Design and connect hardware accelerators (GCD unit, Mandelbrot fractal engine, DDFS audio synthesizer) and evaluate HW/SW partitioning.
- Debug and simulate mixed HDL and software components using common FPGA toolchains (ModelSim, Quartus, Nios II EDS) and on‑board testing.
Topics Covered
- Part I: HDL Fundamentals and Synthesis — VHDL constructs, combinational and sequential design, synthesis guidelines
- HDL Design Examples and Testbenches — writing testbenches and simulation practices
- Part II: Introduction to SoPC and Nios II — Nios II architecture, SOPC Builder/Qsys, toolchain overview
- Embedded Software Development for Nios II — C runtime, BSPs, interrupts, and low‑level I/O access
- Part III: Complex I/O Peripherals — PS/2 keyboard/mouse, graphic video (VGA) controller, audio codec interface
- SD Card Interface and File I/O — SPI/SD protocol basics and integration with Nios II
- Part IV: Hardware Accelerators and Case Studies — custom GCD circuit, Mandelbrot accelerator, DDFS audio synthesizer
- System Integration and Performance Considerations — HW/SW partitioning, bus arbitration, timing and resource tradeoffs
- Practical Board Examples and Test Procedures — development boards, pin assignments, and on‑board debugging
- Appendices — Quartus/SOPC Builder (Qsys) walkthroughs, ModelSim tips, reference code listings
Languages, Platforms & Tools
How It Compares
Compared with Pong P. Chu's FPGA Prototyping books, this title is more focused on SoPC integration with the Nios II and hands‑on peripheral/software examples; compared to Wayne Wolf's 'FPGA‑Based System Design', it is more tutorial and example driven rather than surveying high‑level architectural topics.
