by S. M. Loo, Arlen Planting Department of Electrical and...

Boise State University

Digital Systems Laboratory

EE230L Introduction to Xilinx ISE 1

byS. M. Loo, Arlen Planting

Department of Electrical and Computer EngineeringBoise State University

First Released: Spring 2005 with ISE 6.3iUpdated: Fall 2006 with ISE 8.1i

Updated: Spring 2009 with ISE 10.1


Digital Systems Laboratory Introduction

• This tutorial will introduce the Xilinx ISE Computer-Aided

Design (CAD) Software

• The goal of this tutorial is to provide you with the skills to

use ISE to facilitate learning digital designs

• This software tool is capable of simulating any digital

design that you will attempt in this class and, more


design that you will attempt in this class and, more

importantly, in a real-world environment

• You will enter a logic circuit that implements the equal

function!• This tutorial has been prepared by your friendly neighborhood lab assistant and

course instructor


Digital Systems Laboratory Start Project Navigator

• Find the Xilinx ISE 10.1 icon on desktop to start Xilinx Project Navigator and double-click the icon

• This is the Xilinx ISE window


• This is the Xilinx ISE window

• ISE always opens the most recent project! If this sub-window contains data, then use FILE→Close Project.

• Note Project Navigator in Windows task bar.


Digital Systems Laboratory Create New Project

• To create a new project, File→New Project



Digital Systems Laboratory Name Schematic

• Give a name to the

project

• Make sure that the

project location is

where you want it.

The lab computer


The lab computer

has a D drive, and

can be used for

your designs.

• Top-Level Module

Type is Schematic

When all the fields have been filled, click Next.


Digital Systems Laboratory Target Device Specification

• This is important, and will be used later for FPGA designs.

• Make sure other values match what is shown

• This device specification is


specification is required for targeting the FPGA we have in the lab. This will be important when we download to the FPGA.


Digital Systems Laboratory Skip these Dialogs



Digital Systems Laboratory Lab1-Equals Project

• Note the

project name

and target


and target

FPGA ID


Digital Systems Laboratory Add Schematic Source to Project

• Now we

need to add

a schematic

source to the

project



Digital Systems Laboratory Name Schematic

• Select Schematic

• Name Schematic



Digital Systems Laboratory New Schematic Window

• A blank schematic sheet has been created and added to the project.

• Double click on

• You will get this


• You will get this schematic capture window. Re-size the window to optimize the working area. Try to close the middle window (the “Select Options” window)


Digital Systems Laboratory Change Page Size

• Since this is a

small design, we

will change the

page size to fit

an 11”x8.5”

sheet of paper.



Digital Systems Laboratory Set Page Size to 11”x8.5”


• You can always increase the page size by revisiting these steps.


Digital Systems Laboratory Add Symbols

• Now we want to add the component symbols to the schematic

• Select the Add Symbol button from the toolbar.


• Hitting the Esc key will cancel the Add Symbol mode.


Digital Systems Laboratory Add Title to Schematic Diagram

• Symbol

categories

• Symbols within

each category



Digital Systems Laboratory Add Inv Symbols

• Select “Logic” Category and find “Inv” (abbreviation for inverter)

• Place two “Inv” on the sheet, by clicking at the desired locations on the sheet


on the sheet

• Symbols can be moved by clicking once at the symbol. This turns the symbol to red, then it can be moved


Digital Systems Laboratory Add 2-input AND Symbols

• Select the

AND2 symbol

and click on

drawing where

you wish to

add symbol


• Add two

AND2

symbols


Digital Systems Laboratory Add 2-input OR Symbol

• Select the OR2 symbol and click on drawing where you wish to add symbol


• Add one OR2 symbol

• Organize the symbols as you see in this figure


Digital Systems Laboratory Label Symbols


• Right Click on symbol and select Object Properties– This step is to label the symbols to something that could be more

meaningful to you by changing to the Value of InstName

• This step is optional


Digital Systems Laboratory Set Symbol’s Properties

• Change InstName Value as you desire



Digital Systems Laboratory Add Wires

• Now add wires to connect the symbols

• Close the Source window by (pull-down menu) View → Source

• Open the Processes window by (pull-down menu) View →Processes

• Select the Add Wire button from the toolbar


the toolbar

• On the options tab, select the Use the Manual method …

• Hitting the Esc key will cancel the Add Wire mode and lead to this window that is very useful for selecting a wire


Digital Systems Laboratory Add Wire Step 1


• Connect these two segments as indicated by the green

arrows




• Hover over as indicated by the red arrow until the cursor

image changes to connection point indicator

• Connection point indicator




• Left click (hold the left button) and drag wire as shown in

figure

• Once connection indicator appears, release mouse button


Digital Systems Laboratory Schematic with Wires


• Repeat until you have connected all of the pins

• For pins that are connected to external devices such as switches and LEDs, just add wire and leave unconnected on that end

• Does your schematic look like the one above?


Digital Systems Laboratory Add I/O Markers (or I/O Pads)

• Select the Add

I/O Marker

button from the

toolbar



Digital Systems Laboratory Add Input/Output Markers

• Select “Add an input marker”

• Add input markers

• Select “Add an output marker”

• Add output marker



Digital Systems Laboratory Label I/O Markers

• Right Click I/O Markers

and select Rename

Port

• Input names should be

SW1 and SW2


SW1 and SW2

• Output name should

be LED1


Digital Systems Laboratory Save and Check Schematic

• Save the schematic diagram

• Activate the schematic check routine (pull-down menu), Tools→Check Schematic

• Fix any error you might have and run the check routine

– Observe the bottom window for these messages• “Start DRC …”

• “No error or warning is detected”

• You can print your schematic diagram (portrait or landscape) or even preview the printout before you print


preview the printout before you print

• Save the diagram before you exit the schematic capture tool (by clicking on the × on the top right hand corner of the schematic capture window)



Back to Project Design

Summary



Digital Systems Laboratory Add Test Bench Source

• The circuit entry is completed, but how do we know whether the design works?

• We will test our design using a test bench!



Digital Systems Laboratory Name Test Bench

• Select Test Bench

Waveform

• Name Test Bench



Digital Systems Laboratory Associate Test Bench With Schematic

• Select the schematic

that is to be used by this

Test Bench



Digital Systems Laboratory Test Bench Creation




Accept Default Timing

Values



Digital Systems Laboratory New Test Bench Window

• The waveform window is part of ISE



Digital Systems Laboratory Define Input Values


• Note the vertical blue line in column 1000 - this is the end of

test marker. It was set in the initial slide. You can reset this

number by positioning the pointer on top of the blue line

close to the time ruler and right clicking.

• Why are the values for SW1 and SW2 defined this way?

You need to understand.


Digital Systems Laboratory Save Test Bench Definition

• The Test Bench is not added to the project until you have

saved this file



Digital Systems Laboratory Test Bench & Project

• Note that the Test Bench

TB_Equals has been added

to the project

• Select the “Behavioral

Simulation” from the pull-

down menu as shown and

close the test bench


close the test bench

waveform window


Digital Systems Laboratory Activate Simulation

• Make sure that TB_Equals.tbw is selected

• Note the entries in figure

• We want to use Simulate Behavioral Model

• This will create a new set of windows that are


of windows that are separate from ISE


Digital Systems Laboratory Wave Default


• Multiple windows will appear on Xilinx ISE Simulation


Digital Systems Laboratory Zoom to View Wave


• You can move the blue cursor to observe the values at

different times.


Digital Systems Laboratory Close Windows

• Close Xilinx ISE 10.1



Digital Systems Laboratory Now wasn’t that simple ?



Digital Systems Laboratory And don’t you forget it !


by S. M. Loo, Arlen Planting Department of Electrical and...

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