Raptor Lake CRB


Raptor Lake Reference Board (RPL CRB) is an example implementation of a compact single board computer with high performance for IoT edge devices.

This board configuration enables kernel support for the RPL board.


This board configuration works on the variant of RPL boards containing Intel® Core™ SoC.


General information about the board can be found at the RPL website.

Supported Features

UART Serial Port Support

The Raptor Lake UARTs are NS16550-compatible. Baud rate of 115.2kbps is supported on uart0.

Connections and IOs

Refer to the RPL website for more information.

Programming and Debugging

Use the following procedures for booting an image on a RPL CRB board.

Build Zephyr application

  1. Build a Zephyr application; for instance, to build the hello_world application on Raptor Lake CRB:

    # From the root of the zephyr repository
    west build -b rpl_crb samples/hello_world


    A Zephyr EFI image file named zephyr.efi is automatically created in the build directory after the application is built.

Preparing the Boot Device

Prepare a USB flash drive to boot the Zephyr application image on an Raptor Lake CRB board.

  1. Format the USB flash drive as FAT32.

    On Windows, open File Explorer, and right-click on the USB flash drive. Select Format.... Make sure in File System, FAT32 is selected. Click on the Format button and wait for it to finish.

    On Linux, graphical utilities such as gparted can be used to format the USB flash drive as FAT32. Alternatively, under terminal, find out the corresponding device node for the USB flash drive (for example, /dev/sdd). Execute the following command:

    $ mkfs.vfat -F 32 <device-node>


    Make sure the device node is the actual device node for the USB flash drive. Or else you may erase other storage devices on your system, and will render the system unusable afterwards.

  2. Copy the Zephyr EFI image file zephyr/zephyr.efi to the USB drive.

Booting the Raptor Lake CRB Board

Boot the Raptor Lake CRB board to the EFI shell with USB flash drive connected.

  1. Insert the prepared boot device (USB flash drive) into the Raptor Lake CRB board.

  2. Connect the board to the host system using the serial cable and configure your host system to watch for serial data. See RPL website for more information.


    On Windows, PuTTY has an option to set up configuration for serial data. Use a baud rate of 115200.

  3. Power on the Raptor Lake CRB board.

  4. When the following output appears, press F7:

    Press <DEL> or <ESC> to enter setup.
  5. From the menu that appears, select the menu entry that describes that particular EFI shell.

  6. From the EFI shell select Zephyr EFI image to boot.

    Shell> fs0:zephyr.efi