New Horizons

Welcome to my blog

My name is Sven Andersson and I
work as a consultant in embedded
system design, implemented in ASIC
and FPGA.
In my spare time I write this blog
and I hope it will inspire others to
learn more about this fantastic field.
I live in Stockholm Sweden and have
my own company


You are welcome to contact me
and ask questions or make comments
about my blog.


New Horizons
What's new
Starting a blog
Writing a blog
Using an RSS reader

Zynq Design From Scratch
Started February 2014
1 Introduction
Changes and updates
2 Zynq-7000 All Programmable SoC
3 ZedBoard and other boards
4 Computer platform and VirtualBox
5 Installing Ubuntu
6 Fixing Ubuntu
7 Installing Vivado
8 Starting Vivado
9 Using Vivado
10 Lab 1. Create a Zynq project
11 Lab 1. Build a hardware platform
12 Lab 1. Create a software application
13 Lab 1. Connect to ZedBoard
14 Lab 1. Run a software application
15 Lab 1. Benchmarking ARM Cortex-A9
16 Lab 2. Adding a GPIO peripheral
17 Lab 2. Create a custom HDL module
18 Lab 2. Connect package pins and implement
19 Lab 2. Create a software application and configure the PL
20 Lab 2. Debugging a software application
21 Running Linux from SD card
22 Installing PetaLinux
23 Booting PetaLinux
24 Connect to ZedBoad via ethernet
25 Rebuilding the PetaLinux kernel image
26 Running a DHCP server on the host
27 Running a TFTP server on the host
28 PetaLinux boot via U-boot
29 PetaLinux application development
30 Fixing the host computer
31 Running NFS servers
32 VirtualBox seamless mode
33 Mounting guest file system using sshfs
34 PetaLinux. Setting up a web server
35 PetaLinux. Using cgi scripts
36 PetaLinux. Web enabled application
37 Convert from VirtualBox to VMware
38 Running Linaro Ubuntu on ZedBoard
39 Running Android on ZedBoard
40 Lab2. Booting from SD card and SPI flash
41 Lab2. PetaLinux board bringup
42 Lab2. Writing userspace IO device driver
43 Lab2. Hardware debugging
44 MicroZed quick start
45 Installing Vivado 2014.1
46 Lab3. Adding push buttons to our Zynq system
47 Lab3. Adding an interrupt service routine
48 Installing Ubuntu 14.04
49 Installing Vivado and Petalinux 2014.2
50 Using Vivado 2014.2
51 Upgrading to Ubuntu 14.04
52 Using Petalinux 2014.2
53 Booting from SD card and SPI flash
54 Booting Petalinux 2014.2 from SD card
55 Booting Petalinux 2014.2 from SPI flash
56 Installing Vivado 2014.3

Chipotle Verification System

EE Times Retrospective Series
It all started more than 40 years ago
My first job as an electrical engineer
The Memory (R)evolution
The Microprocessor (R)evolution

Four soft-core processors
Started January 2012
Table of contents
OpenRISC 1200
Nios II

Using the Spartan-6 LX9 MicroBoard
Started August 2011
Table of contents
Problems, fixes and solutions

FPGA Design From Scratch
Started December 2006
Table of contents
Acronyms and abbreviations

Actel FPGA design
Designing with an Actel FPGA. Part 1
Designing with an Actel FPGA. Part 2
Designing with an Actel FPGA. Part 3
Designing with an Actel FPGA. Part 4
Designing with an Actel FPGA. Part 5

A hardware designer's best friend
Zoo Design Platform

Installing Cobra Command Tool
A processor benchmark

Porting a Unix program to Mac OS X
Fixing a HyperTerminal in Mac OS X
A dream come true

Stockholm by bike

The New York City Marathon

Kittelfjall Lappland

Tour skating in Sweden and around the world
Wild skating
Tour day
Safety equipment
A look at the equipment you need
Skate maintenance
Books, photos, films and videos
Weather forecasts

38000 feet above see level
A trip to Spain
Florida the sunshine state

Photo Albums
Seaside Florida
Ronda Spain
Sevilla Spain
Cordoba Spain
Alhambra Spain
Kittelfjäll Lapland
Landsort Art Walk
Skating on thin ice

100 Power Tips for FPGA Designers

Adventures in ASIC
Computer History Museum
Design & Reuse
d9 Tech Blog
EDA Cafe
EDA DesignLine
Eli's tech Blog
FPGA Arcade
FPGA Central
FPGA developer
FPGA Journal
FPGA World
Lesley Shannon Courses
Mac 2 Ubuntu
Programmable Logic DesignLine
World of ASIC

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Thursday, November 10, 2011
FPGA design from scratch. Part 77
Writing our first application program

PetaLinux provides an easy way to develop user applications for MicroBlaze Linux systems, including building, installing, and debugging. This tutorial will describe how to create and debug these applications. We will use the document PetaLinux SDK Application Development and Debugging Guide from PetaLogix as the base for this tutorial.

Creating a new application

PetaLinux provides a tool to create user applications for either C or C++ based templates. These templates include application source code and Makefiles so that you can easily configure and compile applications for PetaLinux systems, and install them into the root file system. The basic steps are as follows:

  1. Goto to PetaLinux SDK install directory (cd ....../petalinux-v.2.1-final-full).
  2. Source the settings file (source
  3. Use the command petalinux-new-app to create a user application (petalinux-new-app -l c HelloWorld)
  4. The new application can be found in the user-apps directory (see below)


--> petalinux-new-app -l c HelloWorld

Here is a table describing the template-generated files.

Building the application

Once we have created the new application, the next step is to compile and build it. To include it in the PetaLinux build process we use the command <make appconfig>

--> cd $PETALINUX/software/petalinux-dist

--> make appconfig

The PetaLinux Configuration menu will show up:

Press the down arrow key to scroll down the menu to Customer User Applications and hit Enter.

Hit the Space bar to include HelloWorld in the new build. Exit appconfig and select <Yes> to save the new kernel configuration.

It will take a few seconds for PetaLinux to apply the configuration change, please wait until we see the shell prompt shows again on the command console where we ran "make appconfig".

Rebuild the PetaLinux software image

Run make in the $PETALINUX/software/petalinux-dist directory will rebuild the PetaLinux software image including the selected user application—HelloWorld.

--> cd $PETALINUX/software/petalinux-dist

--> make

For more ways to build our application see the document PetaLinux SDK Application Development and Debugging Guide.

Test our new application

Now it is time to test our new application. We will use the QEMU emulator at first.


--> petalinux-qemu-boot

Our HelloWorld program shows up in the bin directory and we can run it.

Application development

When developing a new application it is very time consuming to every time build a new PetaLinux image and download it to the development board to test it. A much more efficient way is to mount the host application development directory inside the PetaLinux file system and run the application directly. Here is a description how it can be done.

Here is the our host application development directory structure. We will mount the user-apps directory in the PetaLinux /mnt directory using the NFS server described in part 74.

We will start by adding the following line in the /etc/exports file:


We have to restart the NFS server for this change to take effect. Now we can mount the user-apps directory in PetaLinux using the following command:

mount -t nfs /mnt -otcp,rsize=4096,wsize=4096

This what we will see:

To run the Hello World program execute the following command:

--> cd HelloWorld

--> ./HelloWorld

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