Creating a New Project
After exporting the hardware description file from Vivado, the next step is to create and initialize a new Petalinux project. This can be done using the petalinux-create tool, which sets up the basic project structure:
petalinux-create --type project --template <CPU_NAME> --name <PROJECT_NAME>
Here’s what each parameter means:
- --template: This specifies the type of CPU. Supported options include zynqMP, zynq, and microblaze.
- --name: This is the name you want to assign to your Petalinux project.
The petalinux-create command generates a default project directory based on the selected template. These settings will later be adjusted according to your specific hardware configuration.
Importing the Hardware Description File
Once the hardware description file is ready, it needs to be imported into the Petalinux project. Follow these steps:
- Navigate to the directory where the hardware description file was generated by Vivado. For example:
$ cd /path/to/hardware/description- Use the following command to import the hardware description:
$ petalinux-config --get-hw-description -p <project_directory>
The -p option tells Petalinux which project directory to update with the hardware description. Once this is done, the system-level menuconfig interface will appear. This interface is shown only when the project is first initialized. You can access it again at any time by running petalinux-config in the project directory.
Inside the menu, you’ll find several options such as Linux Components Selection, Auto Config Settings, Kernel Bootargs, U-Boot Configuration, Image Packaging, and Firmware Version Configuration.
Navigate to “Subsystem AUTO Hardware Settings†to configure hardware-specific settings. You'll see options like System Processor, Memory Settings, Serial Settings, Ethernet Settings, Flash Settings, SD/SDIO Settings, and more.
This section allows you to customize both hardware and software parameters for your system. After exiting the menu, the Petalinux tool will take a few minutes to process the changes, updating the device tree and kernel configuration files accordingly.
For example, if you select ps_ethernet_0 as your network interface, the corresponding Linux kernel driver will be automatically enabled. Similarly, if you enable automatic updates for U-Boot, the Ethernet controller settings will also be updated.
Configuring Project Components
To perform advanced configurations—such as enabling kernel features or modifying flash partitions—you can use the petalinux-config tool with the -c COMPONENT option. Here's how to do it:
- Navigate to the root directory of your Petalinux project:
$ cd <project_root>- Open the top-level configuration menu:
$ petalinux-config- Access the Linux kernel configuration menu:
$ petalinux-config -c kernel- Modify the root file system configuration:
$ petalinux-config -c rootfs
These commands allow you to fine-tune various aspects of your Petalinux project, ensuring it meets your specific requirements and hardware setup.
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