Zynq design from scratch. Part 29. « New Horizons Zynq Blog

Thursday, March 20, 2014

Zynq design from scratch. Part 29.

PetaLinux application development

PetaLinux provides an easy way to develop user applications for Zynq and MicroBlaze Linux systems, including building, installing, and debugging. This guide describes how to create and debug one application for Zynq-7000. Let's start by studying the PetaLinux SDK Application Development Guide.

Create a new application

PetaLinux provides a tool to create user application templates for either C or C++. These templates include application source code and Makefiles so that you can easily configure and compile applications for the target, and install them into the root file system. We will add the PrimeNumber application we have already used in our earlier experiments.

1. Create a user application by running petalinux-create -t apps from inside a PetaLinux project on our workstation.

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

2. Here is the result.

3. We will replace the empty PrimeNumbers.c file with the one we used in our earlier lab.

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.

4. 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

5. Press the down arrow key to scroll down the menu to Apps.

6. Press Enter to got into the Apps sub-menu.

7. Include the bullt-in app gpio-demo and the PrimeNumbers.

8. Exit and save the configuration.

Build a new PetaLinux kernel

9. Execute the command:

->petalinux-build

10. We can see that the apps gpio-demo and PrimeNumbers will be included in the build.

11. Follow the instructions from part 28 to netboot the new image.

12. Here is the result from running PrimeNumbers.

Running gpio-demo

gpio-demo is a program that can be used to send and read data to/from the GPIO port. Type
gpio-demo to find out more.

->gpio-demo

13. Use this command to turn on all eight LEDs on the board:

->gpio-demo -g 243 -o 255

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Posted at 09:46 by


	L30nardoSV November 9, 2015 04:48 PM PST Hello, I confirm what CArlos said. It happens with the 2014.04 version.


	Carlos Moraes January 2, 2015 01:10 AM PST Hi everybody!! My gpiochip number are differrent. LEDs 0 to 7 are gpiochip125 and LED 9 is gpiochip138. Unfortunately, i didn't find any docs related to that, as my revision of PETALINUX is 2014.4. Thanks so much for the blog Sven. Have a happy new year.

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