My First Nios II Software Tutorial 101 Innovation Drive San Jose, CA 95134 (408) 544-7000 http://www.altera.com Document Date: July 2008 TU-01003-1.4 Copyright © 2008 Altera Corporation. All rights reserved. Altera, The Programmable Solutions Company, the stylized Altera logo, specific device des- ignations, and all other words and logos that are identified as trademarks and/or service marks are, unless noted otherwise, the trademarks and service marks of Altera Corporation in the U.S. and other countries. All other product or service names are the property of their respective holders. Al- tera products are protected under numerous U.S. and foreign patents and pending applications, maskwork rights, and copyrights. Altera warrants performance of its semiconductor products to current specifications in accordance with Altera's standard warranty, but reserves the right to make changes to any products and services at any time without notice. Altera assumes no responsibility or liability arising out of the ap- plication or use of any information, product, or service described herein except as expressly agreed to in writing by Altera Corporation. Altera customers are advised to obtain the latest version of device specifications before relying on any published in- formation and before placing orders for products or services. Printed on recycled paper ii Altera Corporation Contents How to Contact Altera .............................................................................................................................. v Typographic Conventions ........................................................................................................................ v Introduction ............................................................................................................................................ 1–1 Software and Hardware Requirements ........................................................................................ 1–1 Download Hardware Design to Target FPGA .................................................................................. 1–4 Nios II IDE Build Flow .......................................................................................................................... 1–6 Create the hello_world Example Project ....................................................................................... 1–7 Build and Run the Program .......................................................................................................... 1–10 Edit and Re-Run the Program ...................................................................................................... 1–12 Why the LED Blinks ....................................................................................................................... 1–13 Debugging the Application .......................................................................................................... 1–15 Configure System Library .................................................................................................................. 1–15 Next Steps ............................................................................................................................................. 1–17 Altera Corporation iii Contents iv Altera Corporation My First Nios II Software Tutorial About this Tutorial This tutorial provides comprehensive information that will help you understand how to create an Altera® FPGA design and run it on your development board. How to Contact For the most up-to-date information about Altera products, refer to the Altera following table. Information Type Contact (1) Technical support www.altera.com/mysupport/ Technical training www.altera.com/training/ [email protected] Product literature www.altera.com/literature/ Altera literature services [email protected] FTP site ftp.altera.com Note to table: (1) You can also contact your local Altera sales office or sales representative. Typographic This document uses the typographic conventions shown below. Conventions Visual Cue Meaning Bold Type with Initial Command names, dialog box titles, checkbox options, and dialog box options are Capital Letters shown in bold, initial capital letters. Example: Save As dialog box. bold type External timing parameters, directory names, project names, disk drive names, filenames, filename extensions, and software utility names are shown in bold type. Examples: fMAX, \qdesigns directory, d: drive, chiptrip.gdf file. Italic Type with Initial Capital Document titles are shown in italic type with initial capital letters. Example: AN 75: Letters High-Speed Board Design. Italic type Internal timing parameters and variables are shown in italic type. Examples: tPIA, n + 1. Variable names are enclosed in angle brackets (< >) and shown in italic type. Example: <file name>, <project name>.pof file. Altera Corporation v Typographic Conventions My First Nios II Software Tutorial Visual Cue Meaning Initial Capital Letters Keyboard keys and menu names are shown with initial capital letters. Examples: Delete key, the Options menu. “Subheading Title” References to sections within a document and titles of on-line help topics are shown in quotation marks. Example: “Typographic Conventions.” Courier type Signal and port names are shown in lowercase Courier type. Examples: data1, tdi, input. Active-low signals are denoted by suffix n, e.g., resetn. Anything that must be typed exactly as it appears is shown in Courier type. For example: c:\qdesigns\tutorial\chiptrip.gdf. Also, sections of an actual file, such as a Report File, references to parts of files (e.g., the AHDL keyword SUBDESIGN), as well as logic function names (e.g., TRI) are shown in Courier. 1., 2., 3., and Numbered steps are used in a list of items when the sequence of the items is a., b., c., etc. important, such as the steps listed in a procedure. ■ ● • Bullets are used in a list of items when the sequence of the items is not important. v The checkmark indicates a procedure that consists of one step only. 1 The hand points to information that requires special attention. The caution indicates required information that needs special consideration and c understanding and should be read prior to starting or continuing with the procedure or process. w The warning indicates information that should be read prior to starting or continuing the procedure or processes r The angled arrow indicates you should press the Enter key. f The feet direct you to more information on a particular topic. vi Altera Corporation 1. My First Nios II Software Design July 2008 Introduction The Nios® II processor core is a soft-core central processing unit (CPU) that you program (along with other hardware components that comprise the Nios II system) onto an Altera® field programmable gate array (FPGA). This tutorial introduces you to the basic software development flow for the Nios II processor. You will use a simple pre-generated Nios II standard hardware system and create a software program to run on it. The example Nios II standard hardware system provides the following necessary components: ■ Nios II processor core ■ Off-chip memory interface to store and run the software ■ JTAG link for communication between the host computer and target hardware (typically using a USB-Blaster cable) ■ LED peripheral I/O (PIO) Software and Hardware Requirements This section assumes you have already installed the Quartus® II design software, the Nios II Embedded Design Suite and your development kit CD-ROM software. Figure 1–1 shows an example of the default installation directories. Altera Corporation 1–1 Introduction Figure 1–1. Default Nios II Embedded Evaluation Kit Installation Directory Contains Quartus II Project Files for the Nios II Standard System: ● SOF ● PTF ● SOPC You Use the hello_world Application in this Tutorial. 1 As you go through the tutorial, <installation directory> represents \altera\<version number>\kits\<kit name>. For example, using the example in Figure 1–1, <installation directory> is \altera\<version number>\kits\cycloneIII_3c25_niosII. 1–2 Altera Corporation My First Nios II Software Tutorial My First Nios II Software Design This document describes how to use the Nios II tools with different development kits. Table 1–1 describes the kit-specific information, which is referenced throughout the text. Table 1–1. Project Directories and Filenames Kit Description Arria GX Nios II Standard Design <installation directory>\examples\ArriaGX_PCIe_Nios_Standard Development FPGA Programming File <Nios II standard design>\Nios_Standard_time_limited.sof Kit PTF File <Nios II standard design>\Arria_GX_Standard.ptf Cyclone III Nios II Standard Design <installation Starter Kit directory>\examples\cycloneIII_3c25_start_niosII_standard FPGA Programming File <Nios II standard design>\cycloneIII_3c25_start_niosII_standard.sof PTF File <Nios II standard design>\cycloneIII_3c25_start_niosII_standard.sof Nios II Nios II Standard Design <installation directory>\examples\standard Embedded FPGA Programming File <Nios II standard Evaluation design>\cycloneIII_embedded_evaluation_kit_standard.sof Kit PTF File <Nios II standard design>\cycloneIII_embedded_evaluation_kit_standard.ptf Cyclone III Nios II Standard Design <installation Development directory>\examples\cycloneIII_3c120_dev_niosII_standard Kit Project Filename <Nios II standard design>\cycloneIII_3c120_dev_niosII_standard.sof PTF File <Nios II standard design>\cycloneIII_3c120_dev_niosII_standard.ptf Stratix III Nios II Standard Design <installation Development