Project Quickstart

This documentation explains how to quickly get started with the EWAOL project. For more information on building an image for the EWAOL project, see Image Builds.

Build Host Setup

A number of dependencies are required to build projects with Yocto. The Yocto Project documentation provides the list of essential packages to be installed on the Build Host.

meta-ewaol-config contains build configs for kas, a tool for easily setting up bitbake based projects. Each build config is a YAML file that specifies sources and parameter definitions which, when passed to kas, will be automatically downloaded and configured in preparation for a subsequent build. kas can also invoke the bitbake build process to condense everything necessary to produce an image from the build config files into a single step.

On the Build Host, install the kas setup tool:

sudo -H pip3 install kas

For more details on kas installation, see kas Dependencies & installation.

For more details on kas, see kas Introduction.


The Build Host machine should have at least 65 GBytes of free disk space for the next steps to work correctly.

Build configuration YAML files can then be built via kas by running:

kas build config.yml

Multiple build configurations can be chained via a colon (:) character to build an image with the sources and configuration defined in both, for example:

kas build config_one.yml:config_two.yml

Multiple distinct builds can be run in sequence by providing space-separated build config arguments to kas.

The build configurations and the distribution features available for EWAOL project builds within meta-ewaol repository are described in: Image Builds.

Minimal Image Build via kas

This section describes how to build images for the EWAOL project for the following machine:

  • The Neoverse N1 System Development Platform (N1SDP), corresponding to the n1sdp MACHINE implemented in meta-arm-bsp.

Checkout the meta-ewaol repository:

mkdir -p ~/ewaol
cd ~/ewaol
git clone -b v0.2.4
cd meta-ewaol

Running kas with the build configurations within meta-ewaol-config will build two images by default: one that includes the Docker container engine and another one that includes the Podman container engine.


To read documentation about the N1SDP board, check the N1SDP Technical Reference Manual.

Build for N1SDP

To build the images via kas for the N1SDP board:

kas build meta-ewaol-config/kas/n1sdp.yml

The resulting images will be produced:

  • build/tmp/deploy/images/n1sdp/ewaol-image-docker-n1sdp.*

  • build/tmp/deploy/images/n1sdp/ewaol-image-podman-n1sdp.*

To build only one image corresponding to a particular container engine, specify the --target (either ewaol-image-docker or ewaol-image-podman) as an option to the kas build command, as shown in the following example:

kas build --target ewaol-image-docker meta-ewaol-config/kas/n1sdp.yml

Deploy on N1SDP

To deploy the image on N1SDP you will need a tool to copy an image using its block map. In this tutorial, we will use bmap-tools which can be installed on your host via the following command (example on Ubuntu based host):

sudo apt install bmap-tools
USB Storage Device

The image is produced as files with the .wic.bmap and .wic.gz extensions. They are produced by building the default build target.

Prepare a USB disk (min size of 64 GB). Identify the USB storage device using lsblk command:

sdc      8:0    0    64G  0 disk


In this example, the USB storage device is the /dev/sdc device. Be extra careful when copying and pasting the following commands.

Use bmap-tools to copy the image to USB disk (docker image in this example):


All partitions and data on the USB disk will be erased. Please backup before continuing.

sudo umount /dev/sdc*
cd build/tmp/deploy/images/n1sdp/
sudo bmaptool copy --bmap ewaol-image-docker-n1sdp.wic.bmap ewaol-image-docker-n1sdp.wic.gz /dev/sdc

Safely eject the USB storage device from the host PC and plug it onto one of the USB 3.0 ports in the N1SDP.

Board’s MCC configuration microSD card


This process doesn’t need to be performed every time the USB Storage Device gets updated. You just need to update the MCC configuration microSD card when the EWAOL version changes.

  1. Connect the USB-B cable to the DBG USB port of the N1SDP back panel.

  2. Find four TTY USB devices in your /dev directory. Example:

ls /dev/ttyUSB*

By default the four ports are connected to the following devices:

  • ttyUSB<n> Motherboard Configuration Controller (MCC)

  • ttyUSB<n+1> Application processor (AP)

  • ttyUSB<n+2> System Control Processor (SCP)

  • ttyUSB<n+3> Manageability Control Processor (MCP)

In this guide the ports are:

  • ttyUSB0: MCC

  • ttyUSB1: AP

  • ttyUSB2: SCP

  • ttyUSB3: MCP

The ports are configured with the following settings:

  • 115200 Baud

  • 8N1

  • No hardware or software flow support

  1. Connect to the MCC console. Any terminal applications such as putty, screen or minicom will work. In this guide, we use the screen command:

sudo screen /dev/ttyUSB0 115200

4. Turn the main power switch on the power supply of the N1SDP tower. The MCC window will be shown. Type ? to see MCC firmware version and a list of commands:

Cmd> ?
 Arm N1SDP MCC Firmware v1.0.1
 Build Date: Sep  5 2019
 Build Time: 14:18:16
 + command ------------------+ function ---------------------------------+
 | CAP "fname" [/A]          | captures serial data to a file            |
 |                           |  [/A option appends data to a file]       |
 | FILL "fname" [nnnn]       | create a file filled with text            |
 |                           |  [nnnn - number of lines, default=1000]   |
 | TYPE "fname"              | displays the content of a text file       |
 | REN "fname1" "fname2"     | renames a file 'fname1' to 'fname2'       |
 | COPY "fin" ["fin2"] "fout"| copies a file 'fin' to 'fout' file        |
 |                           |  ['fin2' option merges 'fin' and 'fin2']  |
 | DEL "fname"               | deletes a file                            |
 | DIR "[mask]"              | displays a list of files in the directory |
 | FORMAT [label]            | formats Flash Memory Card                 |
 | USB_ON                    | Enable usb                                |
 | USB_OFF                   | Disable usb                               |
 | SHUTDOWN                  | Shutdown PSU (leave micro running)        |
 | REBOOT                    | Power cycle system and reboot             |
 | RESET                     | Reset Board using CB_nRST                 |
 | DEBUG                     | Enters debug menu                         |
 | EEPROM                    | Enters eeprom menu                        |
 | HELP  or  ?               | displays this help                        |
 |                                                                       |
 |                                                                       |
 | CASE_FAN_SPEED "SPEED"    | Choose from SLOW, MEDIUM, FAST            |
 | READ_AXI "fname"          | Read system memory to file 'fname'        |
 |          "address"        | from address to end address               |
 |          "end_address"    |                                           |
 | WRITE_AXI "fname"         | Write file 'fname' to system memory       |
 |           "address"       | at address                                |

Enable USB:


5. Mount the N1SDP’s internal microSD card over the DBG USB connection to your host PC and copy the required files.

The microSD card is visible on your host PC as a disk device after issuing the USB_ON command in the MCC console, as performed in the previous step. This can be found using the lsblk command:

sdb      8:0    0     2G  0 disk
└─sdb1   8:1    0     2G  0 part


In this example, we need to mount the /dev/sdb1 partition. Be extra careful when copying and pasting the following commands.

sudo umount /dev/sdb1
sudo mkdir -p /tmp/sdcard
sudo mount /dev/sdb1 /tmp/sdcard
ls /tmp/sdcard
config.txt   ee0316a.txt   LICENSES   LOG.TXT   MB   SOFTWARE

6. Wipe and extract the contents of build/tmp/deploy/images/n1sdp/n1sdp-board-firmware_primary.tar.gz onto the mounted microSD card:

sudo rm -rf /tmp/sdcard/*
sudo tar --no-same-owner -xf \
   build/tmp/deploy/images/n1sdp/n1sdp-board-firmware_primary.tar.gz -C \
   /tmp/sdcard/ && sync
sudo umount /tmp/sdcard
sudo rmdir /tmp/sdcard


If the N1SDP board was manufactured after November 2019 (Serial Number greater than 36253xxx), a different PMIC firmware image must be used to prevent potential damage to the board. More details can be found in Potential firmware damage notice. The MB/HBI0316A/io_v123f.txt file located in the microSD needs to be updated. To update it, set the PMIC image (300k_8c2.bin) to be used in the newer models by running the following commands on your host PC:

sudo umount /dev/sdb1
sudo mkdir -p /tmp/sdcard
sudo mount /dev/sdb1 /tmp/sdcard
sudo sed -i '/^MBPMIC: pms_0V85.bin/s/^/;/g' /tmp/sdcard/MB/HBI0316A/io_v123f.txt
sudo sed -i '/^;MBPMIC: 300k_8c2.bin/s/^;//g' /tmp/sdcard/MB/HBI0316A/io_v123f.txt
sudo umount /tmp/sdcard
sudo rmdir /tmp/sdcard
  1. Power on the main SoC using the MCC console:


Run on N1SDP

To run the image, connect to the AP console by running the following command from a terminal in your host PC:

sudo screen /dev/ttyUSB1 115200

Then, log-in as root without password.

Tests on N1SDP