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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Monday, March 24, 2014
Zynq design from scratch. Part 31.
Running an NFS sever on the Mac OS X

Network File System (NFS) is a distributed file system protocol originally developed by Sun Microsystems in 1984, allowing a user on a client computer to access files over a network much like local storage is accessed.

NFS server

An 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.

Windows PC solution

FreeNFS is a solution for all of you using a Windows PC.

Create a directory to share

We will add a directory called NFSshare in our home directory:

mkdir NFSshare

Create the exports file

We will create a file named exports and add the following text line:

/Users/zoocad/NFSshare -mapall=zoocad -network -mask

XXX -mapall=YYY -network ZZZ -mask

XXX = Path name of our shared directory
yyy = Name of the user account
ZZZ = IP of our network segment, e.g. if the Mac IP Address is so our segnent is

If we like we can add more directory to share. When finished we copy this file to the /etc directory:

sudo cp exports /etc/.

Starting the NFS server

There are only a few commands needed to start the built-in NFS server on the Mac host.

To start:

sudo nfsd update

To show status:

sudo nfsd status

To show exported file systems:

showmount -e

The NFS server is up and running.

Mounting NFSshare in PetaLinux

After booting PetaLinux we can mount the NFSshare directory into the PetaLinux file system. Here is the command to mount it under the /mnt directory:

mount -o nolock -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 /Users/zoocad/NFSshare
  • 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

Running an NFS sever on Ubuntu

We also want to run an NFS server on our Ubuntu Linux OS to enable export of directories to the MaC OS X. First let's make sure we have the following package installed in Ubuntu:

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

Here is information on how to setup a Ubuntu server and here is a how-to document.

Edit exports file

In order to export a file system in our host, we need to edit a file called /etc/exports. The file /etc/exports serves as the access control list for file systems which may be exported to NFS clients.

->sudo gedit /etc/exports



Each line contains an export point and a clients allowed to mount the file system at that point. Each listed client may be immediately followed by a parenthesized, comma-separated list of export options for that client.
  • rw
  • sync
  • insecure (must be used when exporting to Mac OS X)
  • no_subtree_check
The notation means that all IP addresses between and are allowed clients.

Start NFS sever

Use this command to start the NFS server:

->sudo service nfs-kernel-server start

Mount the exported file system

We will mount the file system in our Mac OS X client. Open a terminal and type the following commands:

->mkdir /Users/zoocad/linux-vm
->sudo mount -t nfs /Users/zoocad/linux-vm

  • - IP address of NFS server
  • /home/svenand - File system on the NFS server
  • /Users/zoocad/linux-vm - Mount point on the client

Here is the Finder window showing the svenand file system mounted.

Setting up the TFTP server

Now when we have the Ubuntu file system mounted in Mac OS X we can setup the TFTP server to access the exported file system. Like this:

This means that we never ever have to copy kernel images when we rebuild PetaLinux.

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