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
KittelfjÀll 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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Saturday, April 05, 2014
Zynq design from scratch. Part 34.
Installing custom web server content

By default, system images built with PetaLinux SDK include a web application demo built using the uWeb (MicroWeb) framework from WorkWare Systems. If we prefer to create our own Embedded Web interfaces, PetaLinux also includes the BusyBox httpd server.  This tutorial describes how to configure the BusyBox web server and create/install our own custom web content into a PetaLinux system image.

Create a new application

We will create a dummy application to hold the web content. We call it TourSkating, you will soon see why.

->cd Projects/PetaLinux/Avnet-Digilent-ZedBoard-2013.3
->petalinux-create -t apps --name TourSkating

Building a new application

Once we have created the new application, the next step is to compile and build it. The required steps are shown below.

Select your new application to be included in the build process. The application is not enabled by default. Launch the rootfs configuration menu:

->petalinux-config -c rootfs

3. We will include the TourSkating app and exclude the uWeb app.

4. We need to include the built-in web server (httpd). It can be found in base->busybox->busybox-httpd

5. Exit and save the configuration.

Build a new PetaLinux kernel

6. Execute the command:


Create the index.html file

The web page will display two pictures.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <title>Tour skating in Sweden and around the world</title>
 <h3> The ice is like a mirror</h3>
 <img src="MirrorLike.png">
 <h3> On the ice</h3>
 <img src="TourStart.png">
 <a href="">For more information see my blog</a>

Boot PetaLinux

Follow the instructions in part 28 to boot PetaLinux.

Copying files to the PetaLinux installation

We will use the cURL command to transfer the files from our host to the guest. cURL is a command line tool for doing all sorts of interesting and essential URL manipulations and data transfers. The original goal of the program was to transfer files programmatically via protocols such as http, ftp, gopher, sftp, ftps, scp, tftp, and many others, via a command line interface. The main benefit of using the command line interface is that you can use the program in your Windows batch file or Linux shell scripts to automate many URL related processes. Here are the command to transfer the three files used to display our web page.

->curl -T index.html -u root:root
->curl -T MirrorLike.png -u root:root
->curl -T TourStart.png -u root:root

Moving the files to the httpd directory

The files will be copied to the directory: /var/ftp. We have to move them to the: /home/httpd directory:

->cd /var/ftp
->mv index.html /home/httpd/.
->mv MirrorLike.png /home/httpd/.
->mv TourStart.png /home/httpd/.

Displaying the web page

Enter the web address: in your web browser.

Include the files in the build process

We add the web page files to the httpd directory in the TourSkating apps directory.

We then modify the makefile to include the web page files during the build. Here is the modified makefile:

$(error "Error: PETALINUX environment variable not set.  Change to the root of your PetaLinux install, and source the file")


APP = TourSkating

# Add any other object files to this list below
APP_OBJS = TourSkating.o

all: build install

build: $(APP)

    $(CC) $(LDFLAGS) -o $@ $(APP_OBJS) $(LDLIBS)

    -rm -f $(APP) *.elf *.gdb *.o

.PHONY: install image

install: $(APP)
    $(TARGETINST) -d $(APP) /bin/$(APP)
    $(TARGETINST) httpd/index.html /home/httpd
    $(TARGETINST) httpd/MirrorLike.png /home/httpd
    $(TARGETINST) httpd/TourStart.png /home/httpd
%.o: %.c
    $(CC) -c $(CFLAGS) -o $@ $<

After building and booting PetaLinux we can access the web page without any modifications.

Top   Previous   Next

Posted at 16:15 by

December 11, 2015   09:16 PM PST
The busybox-httpd startup script is wrong. Have a look in your Petalinux build directory - there are 3 identical copies of it. Change DAEMON to /sbin/httpd (remove the /usr part) and change HTTPROOT="/home/httpd" and it will start automatically.
Carlos Moraes
January 4, 2015   07:12 PM PST
Hi Max,

I had the same problem. I created another project and appeared to me the directory and now the httpd works fine.

December 12, 2014   03:45 PM PST
I tried it under petalinux 2014.2. But there is no httpd folder at /home. In my petalatinux project folder in apps/TourSkating is also no httpd folder. i added the folder manually and changed the makefile as described but the build process failed.
at startup the busybox httpd server is not running, i have to run the command "httpd" first then i can run the manually loaded html file. something is very wrong with my petalinux project, do you have any idea? thank you

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