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

Zynq Design From Scratch
Started February 2014
Changes and updates
Zynq-7000 All Programmable SoC
ZedBoard and other boards
Computer platform and VirtualBox
Installing Ubuntu
Fixing Ubuntu
Installing Vivado
Starting Vivado
Using Vivado
Lab 1. Create a Zynq project
Lab 1. Build a hardware platform
Lab 1. Create a software application
Lab 1. Connect to ZedBoard
Lab 1. Run a software application
Lab 1. Benchmarking ARM Cortex-A9
Lab 2. Adding a GPIO peripheral
Lab 2. Create a custom HDL module
Lab 2. Connect package pins and implement
Lab 2. Create a software application and configure the PL
Lab 2. Debugging a software application
Running Linux from SD card
Installing PetaLinux
Booting PetaLinux
Connect to ZedBoad via ethernet
Rebuilding the PetaLinux kernel image
Running a DHCP server on the host
Running a TFTP server on the host
PetaLinux boot via U-boot
PetaLinux application development
Fixing the host computer
Running NFS servers
VirtualBox seamless mode
Mounting guest file system using sshfs
PetaLinux. Setting up a web server
PetaLinux. Using cgi scripts
PetaLinux. Web enabled application
Convert from VirtualBox to VMware
Running Linaro Ubuntu on ZedBoard
Running Android on ZedBoard
Lab2. Booting from SD card and SPI flash
Lab2. PetaLinux board bringup
Lab2. Writing userspace IO device driver
Lab2. Hardware debugging
MicroZed quick start
Installing Vivado 2014.1
Lab3. Adding push buttons to our Zynq system
Lab3. Adding an interrupt service routine
Installing Ubuntu 14.04
Installing Vivado and Petalinux 2014.2

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

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, February 20, 2014
Zynq design from scratch. Part 14.
Run a software application

After installing the JTAG cable drivers and having a working connection to the ZedBoard we are ready to run the "Hello World" program. We will use Xilinx SDK to configure the ARM processing system load and run the program. Before we start SDK let's setup a terminal emulator.

Terminal emulator setup

We need to connect a terminal to the Zynq Processing system to be able to print out the "Hello World" string. We could of course connect a real hardware terminal but i think that is overkill. We will connect a terminal emulator instead. I have been using GTKterm for many years and find it very easy to use. Let's install it:

sudo apt-get install gtkterm

Starting GTKterm

gtkterm &

First time we start GTKterm we will get an error and this window pops up:

Here is the explanation.

This can easily be fixed by adding us to the dialout group using the following command:

sudo addgroup svenand dialout

Logout and login for the group add to take place.

Select Configuration->Port

Select port: /dev/ttyACM0 and set the baud rate to 115200.

If this window pops up just try a few more times and all of sudden it works. I have no explanation why this happens. Executing this command before starting GTKterm seems to fix the problem:

fuser -k /dev/ttyACM0

Start SDK

xsdk &

Right-click on the HelloWorld application and select Run As-> Run Configuration.

Select Xilinx C/C++ application (GDB) and then click the New icon (the one with the +).

SDK creates a new Run Configuration and automatically assigns a name to the configuration HelloWorld Debug.

Run the application

Click RUN to initial the processing system (PS) and then load and run the application.

And finally the text "Hello World" is displayed on the terminal screen. Time to celebrate, let's have a beer together. After the beer here is one more example.

Calculate prime numbers

Here is  a simple program that will calculate all prime numbers between 1 and 2000.

Let's create a new application project called PrimeNumbers.

Choose an empty application.

Copy the file PrimeNumbers.c to the src directory.

Refresh, compile and run the application. Here is the result.

One observation, printf command works just fine. Now when we know how to run an application, let's try some of the other templates. Here is the print out from the Peripheral Tests.

Time to take a break

Top   Previous   Next

Posted at 08:15 by svenand

September 12, 2014   01:41 PM PDT
Instead of using Gtkterm you can also use a normal ubuntu terminal , runing:

$ sudo apt-get install minicom

$ sudo minicom -D /dev/ttyACM0 -b 115200

with the advantage that you don't need to reboot the terminal everytime the board is rebooted
John Mower
June 27, 2014   07:13 PM PDT
Hi, thanks for the great tutorials. I recently started in on the microzed board and could not get the system debugger to work! The xilinx documents showing how to do this use the built in terminal and SDK crashed everytime. I took your example and used CU terminal and the debugger works fine for me now!
Brandon J
June 27, 2014   03:31 PM PDT
djtgcfg enum also didn't work for me. I used minicom to monitor uart and it worked great.
June 25, 2014   11:56 AM PDT
Hi Svenand,
Eventhough i still can´t find the device with " djtgcfg enum", i have been able to complete this examples conecting the console to "/dev/ttyUSB0 " port.
Thanks for the great tutorial
June 18, 2014   08:13 PM PDT
Hi Huse,
I have used Vivado 2013.4 and 2014.1. Maybe something has changed in Vivado 2014.2. I will install Vivado 2014.2 and give it a try.
June 18, 2014   06:12 PM PDT
Hej Svenand.
I'm following your tutorial with Vivado 2014.2 and Microzed, but some steps don't come out as yours. The hardware manager locates the board but when i run "djtgcfg enum" it says that no device is found. in gtkterm, there is no ACM0, only ttyS0 to ttyS11.
So eventhough i can run HelloWorld i can't see the result, and SDK alerts me that "Process STDIO not connected to console".
I would truely apreciate a hint.

robert haris
May 15, 2014   05:54 AM PDT
The great and usefull article

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