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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Sunday, November 06, 2011
FPGA design from scratch. Part 74

Networking configuration procedures

This tutorial will show us how to setup communication channels between PetaLinux running in the MicroBlaze processor and the host system we use for all our program development and hardware generation. We will look at setting up a TFTP server and a NFS server. We will use this document as a starting point. We will also look at how to use telnet and ftp for communication with our board.

Setup a TFTP server

Trivial File Transfer Protocol (TFTP) is a very simple file transfer protocol, with the functionality of a very basic form of FTP. We will install the server in a Debian 64 bit Linux system.

Installing the TFTP server

We will install the following packages if not already installed.

--> sudo apg-get install tftp

--> sudo apt-get install xinetd

--> sudo apt-get install tftpd

Setting up the transfer directory

We will create a directory called /tftpboot in our host machine and allow everyone full access. Files put in this directory can be grabbed from other machines connected to the network.

--> sudo mkdir /tftpboot

--> sudo chmod -R 777 /tftpboot

--> sudo chown -R nobody /tftpboot

Setting up the configuration file

Create a file /etc/xinetd.d/tftp and include the following:

Starting the TFTP server

Use the following command to restart the server:

--> sudo /etc/init.d/xinetd stop

--> sudo /etc/init.d/xinetd start

Testing the TFTP server

Ensure the tftpd service is up and running.

We will put a small text file called test in the /tftpboot directory and try to grab it using tftp.

Setup a NFS server

NFS server allows NFS-mount root file system (or NFS mount) on the targeting board. This is normally used during application development stage. The main idea here is to provide application/software developers a rapid turnaround during testing and development environment, because downloading the modified file system image to the target hardware is not necessary.

Installing software

The following packages must be installed:

--> sudo apt-get install portmap

--> sudo apt-get install nfs-kernel-server

Setting up a configuration file for PetaLinux environment

The main configuration file we will need to edit to set up an NFS server is:  /etc/exports. This file contains a list of entries; each entry indicates a volume that is shared and how it is shared. 

/opt/home/svan/petaLinux/hardware is the path that will be exported. The IP address is the address of the host machine. Use the command to find the IP address:

--> /sbin/ifconfig

Starting NFS and portmap services

Use the following command to start the NFS server and portmap:

--> sudo /etc/init.d/portmap start

--> sudo /etc/init.d/nfs-kernel-server start

To find out if the NFS server and portmapper is up and running execute the following command:

--> rpcinfo -p

Congratulations! We are all set.

Mounting the shared directory

Use this command to mount the shared directories in our PetaLinux file system in the /mnt directory:

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

This is telling mount that

  • we want to mount a file system of NFS type (-t NFS)
  • the host of this file system has IP address
  • the directory on that host we wish to mount is /home/svan..../hardware
  • we want this file system to be mounted underneath the local /mnt directory
  • data transfer uses TCP protocol (-otcp)
  • the read and write operations should use block size of 4096

Here is the result.

Using the TFTP server

The tftp command used in PetaLinux is implemented in BusyBox.


BusyBox combines tiny versions of many common UNIX utilities into a single small executable. It provides minimalist replacements for most of the utilities you usually find in GNU coreutils, util-linux, etc. The utilities in BusyBox generally have fewer options than their full-featured GNU cousins; however, the options that are included provide the expected functionality and behave very much like their GNU counterparts.

Get a file

To transfer a file from the Debian Linux host to the PetaLinux directory /home/svan execute the following command in the PetaLinux terminal:

Put a file

To transfer a file from the PetaLinux host to the Debian host execute the following command in the PetaLinux terminal:

Telnet to the board

PeatLinux supports the standard telnet protocol directly. Let's try it. First we have to find out the IP address to our MicroBlaze board. In the terminal window execute the command:

--> ifconfig

Execute this command on the host:

--> telnet

Using FTP

FTP is another frequently used network feature. Our MicroBlaze Linux system is pre-configured with a FTP server. Here is a tutorial describing the FTP command. Here are the steps to use FTP:

If we prefer we may also use a graphical FTP program like FileZilla or gftp. Here is an example using FileZilla.

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