ECE 448 FPGA and ASIC Design with VHDL Spring 2008.

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ECE 448 FPGA and ASIC Design with VHDL Spring 2008

ECE 448 Team Course Instructor: Kris Gaj Lab Instructors (TAs): Tuesday & Wednesday sections: Danesh Esteki took ECE 448 in Spring 2007 Thursday section: Joe Burns MS CpE student, specializing in Digital Systems Design

ECE 448 Team – Division of Tasks Course Instructor – Primary Responsibilities - Lectures - Preparing and grading exams and quizzes - Coordination of work on development of new experiments - Instructions for the lab experiments - Coordination of work done by the TAs - Enforcing consistent policies and grading standards - Mid-semester student satisfaction survey - Resolving conflicts and providing feedback to the TAs - Holding office hours

ECE 448 Team – Division of Tasks Lab Instructors (TAs) – Primary Responsibilities - Teaching hands-on sessions on how to use software, hardware and testing equipment needed for experiments - Introductions to the lab experiments - Grading student demonstrations and reports - Holding office hours - Development and testing of new lab experiments

Course hours Lecture: Monday, Wednesday 3:00-4:15 PM, Krug Hall, room 242 Lab Sessions: Tuesday, Wednesday, Thursday 7:20-10:00 PM, S&T 2, room 203 There will be no lab meetings in the first week of classes Office hours: TBD and posted on the web

You are welcome to attend any of the multiple office hour sessions Please attend the class meetings of the other section only in case of emergency and give preference in access to the lab computers to the students attending their own section All experiment demonstrations need to be done in the presence of your TA, and can be done exclusively during the class time of your section ECE 448 Section Assignment Rules

Lab Access Rules and Behavior Code Please refer to the FPGA Design & Test Lab website:

Grading criteria First part of the semester (before the Spring break) Second part of the semester (after the Spring break) Lab experiments & homework - Part I 20% Final exam 25% Lab experiments & homework - Part II 20% Midterm exam for the lecture: 10% Midterm exam for the lab: 15% Quizzes: 5%

Required Textbooks Stephen Brown and Zvonko Vranesic, Fundamentals of Digital Logic with VHDL Design, McGraw-Hill © 2nd edition, 2005, ISBN: Mark Zwolinski, Digital System Design with VHDL, Prentice Hall © 2nd edition, 2004, ISBN: X

ECE 331 ECE 332 ECE 280  C ECE 445  C ECE 442 ECE 447  C ECE 448 Digital Systems & Computers PHYS 261PHYS 265 or Old Curriculum  C ECE 492 ECE 493 CS 367 BS EE BS CpE Color code:

ECE 331 ECE 332 ECE 280  C ECE 445  C ECE 447  C ECE 448 Digital Systems & Computers PHYS 261PHYS 265 or ECE 492 ECE 493 New Curriculum CS 222 CS 367 BS EE BS CpE Color code:  C

Transition from ECE 449 to ECE 448 starting in Spring 2006 ECE credit hour VHDL intro + FPGA intro + hands-on tools intro + experiment intro + lab time 4 credit hours Lecture Lab NEW COURSE, ECE 448 VHDL intro + FPGA intro + ASIC intro + more advanced lectures on applications and platforms hands-on tools intro + experiment intro + lab time Lab

VHDL: - writing synthesizable RTL level code in VHDL - writing test benches FPGAs: - architecture of FPGA devices - tools for the computer-aided design with FPGAs - current FPGA families & future trends Topics ECE 448, FPGA and ASIC Design with VHDL

Applications: - basics of computer arithmetic - applications from communications, cryptography, digital signal processing, bioengineering, etc. - FPGA boards - microprocessor board–FPGA board interfaces: PCI, PCI-X - reconfigurable computers High-level ASIC Design: - standard cell implementation approach - logic synthesis tools - differences between FPGA & standard-cell ASIC design flow New trends: - using high-level programming languages to design hardware - microprocessors embedded in FPGAs Platforms:

Tasks of the course Advanced course on digital system design with VHDL Comprehensive introduction to FPGA & front-end ASIC technology Testing equipment - writing VHDL code for synthesis - design using finite state machines and algorithmic state machines - test benches - hardware: Xilinx FPGAs, TSMC library of standard ASIC cells - software: VHDL simulators Synthesis tools Xilinx ISE - oscilloscopes - logic analyzer

VHDL for Specification VHDL for Simulation VHDL for Synthesis

Levels of design description Algorithmic level Register Transfer Level Logic (gate) level Circuit (transistor) level Physical (layout) level Level of description most suitable for synthesis

Register Transfer Level (RTL) Design Description Combinational Logic Combinational Logic Registers …

VHDL Design Styles Components and interconnects structural VHDL Design Styles dataflow Concurrent statements behavioral Registers, counters, etc. State machines Sequential statements Subset most suitable for synthesis Testbenches

Testbench Environment TB Processes Generating Stimuli Design Under Test (DUT) Stimuli All DUT Inputs Simulated Outputs

World of Integrated Circuits Integrated Circuits Full-Custom ASICs Semi-Custom ASICs User Programmable PLDFPGA PALPLAPML LUT (Look-Up Table) MUXGates

Block RAMs Configurable Logic Blocks I/O Blocks What is an FPGA? Block RAMs

designs must be sent for expensive and time consuming fabrication in semiconductor foundry bought off the shelf and reconfigured by designers themselves Two competing implementation approaches ASIC Application Specific Integrated Circuit FPGA Field Programmable Gate Array designed all the way from behavioral description to physical layout no physical layout design; design ends with a bitstream used to configure a device

FPGAs vs. ASICs ASICs FPGAs High performance Off-the-shelf Short time to the market Low development costs Reconfigurability Low power Low cost (but only in high volumes)

FPGA Design process (1) Design and implement a simple unit permitting to speed up encryption with RC5-similar cipher with fixed key set on 8031 microcontroller. Unlike in the experiment 5, this time your unit has to be able to perform an encryption algorithm by itself, executing 32 rounds….. Library IEEE; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity RC5_core is port( clock, reset, encr_decr: in std_logic; data_input: in std_logic_vector(31 downto 0); data_output: out std_logic_vector(31 downto 0); out_full: in std_logic; key_input: in std_logic_vector(31 downto 0); key_read: out std_logic; ); end AES_core; Specification (Lab Experiments) VHDL description (Your Source Files) Functional simulation Post-synthesis simulation Synthesis On-paper hardware design (Block diagram & ASM chart)

FPGA Design process (2) Implementation Configuration Timing simulation On chip testing

Simulation Tools

FPGA Synthesis Tools

architecture MLU_DATAFLOW of MLU is signal A1:STD_LOGIC; signal B1:STD_LOGIC; signal Y1:STD_LOGIC; signal MUX_0, MUX_1, MUX_2, MUX_3: STD_LOGIC; begin A1<=A when (NEG_A='0') else not A; B1<=B when (NEG_B='0') else not B; Y<=Y1 when (NEG_Y='0') else not Y1; MUX_0<=A1 and B1; MUX_1<=A1 or B1; MUX_2<=A1 xor B1; MUX_3<=A1 xnor B1; with (L1 & L0) select Y1<=MUX_0 when "00", MUX_1 when "01", MUX_2 when "10", MUX_3 when others; end MLU_DATAFLOW; VHDL description Circuit netlist Logic Synthesis

FPGA Implementation After synthesis the entire implementation process is performed by FPGA vendor tools

Design Process control from Active-HDL

Top Level ASIC Digital Design Flow RTL Design Place+Route Physical Verification Synthesis Design Inception Design Complete Macro Development

ASIC Simulation Tools

ASIC Synthesis Tools

Xilinx FPGA Tools Aldec Active HDL ModelSim Xilinx Edition Synplicity Synplify Pro Xilinx XST Xilinx ISE Xilinx XST (limited) Xilinx WebPACK ECE LabsHome Aldec Active HDL Student Edition Xilinx XST (limited) Xilinx WebPACK Windows

Altera FPGA Tools Altera Quartus II Lab Home for free Windows

ASIC Tools Synopsys Design Analyzerremote access Synopsys Design Analyzer Lab Home for free Unix

Celoxica RC10 Educational Board

FPGA available on the board Xilinx Spartan 3, XC3S1500 FPGA 1,500,000 equivalent logic gates 13,312 CLB slices Programmable Interconnects Configurable Logic Block slices (CLB slices) Block RAMs 576 kbits of memory in block RAMs

Digital system design technologies coverage in the CpE & EE programs at GMU Microprocessors ASICs FPGAs ECE 445 ECE 447 ECE 586 ECE 681 ECE 448 ECE 511 ECE 611 ECE 431 Computer Organization Single Chip Microcomputers FPGA and ASIC Design with VHDL Digital Circuit Design Microprocessors Advanced Microprocessors Digital Integrated Circuits VLSI Design Automation ECE 545 Introduction to VHDL ECE 645 Computer Arithmetic

Why ECE 448 is a challenging course? need to “relearn” VHDL need to learn new tools need to perform practical experiments time needed to complete experiments

ECE 448: Spring 2006 Student Survey Summary

Difficulties finding time to do the labs - 15 learning VHDL – 2 getting used to software – 1

Average time spent per one experiment

Self-evaluation 8 – worse than expected 16 – as well as expected 3 – better than expected

Why is this course worth taking? VHDL for synthesis: one of the most sought-after skills knowledge of state-of-the-art tools used in the industry knowledge of the modern FPGA & ASIC technologies knowledge of state-of-the-art testing equipment design portfolio that can be used during job interviews unique knowledge and practical skills that make you competitive at the job market