3.2. Getting started with Linux#

3.2.1. Connect the Ethernet cable to the host computer’s 10G Ethernet port#

Please make sure you connect the ethernet cable to the port that has 10Gb compatibility. In this manual, we use eth1 port.

3.2.2. Configure the network#

3.2.2.2. Set MTU 9000#

Set the MTU to 9000 to achieve the intended network bandwidth. To do that, please use the following commands.

sudo ifconfig eth1 down
sudo ifconfig eth1 mtu 9000
sudo ifconfig eth1 up

After that, please confirm the mtu setting.

ifconfig

The output should look like the following.

ubuntu@EAC-5000:~$ ifconfig
...
eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 9000
        inet 10.42.0.1  netmask 255.255.255.0  broadcast 10.42.0.255
...

The setting is successful if mtu 9000 is displayed.

3.2.2.3. Setting IP address to the board#

You can set the IP address on the board in three ways.

  • Manually

  • Systemd network file

  • DHCP

To set the IP address manually or via a systemd network file, you first need to log in to the board via the serial console.

Setting it via a network file enables persistence across reboots.

3.2.2.3.1. Setting IP address via DHCP#

To assign the IP address for the ethernet port of the GMSL board, we configure network settings by using GUI.

  1. Open network settings (Settings -> Network).

  2. Select the Ethernet adopter that has 10Gb speed (Aquantia Ethernet is the one in this example)

    ../../_images/network_setting_1.png

    Fig. 3.3 Network setting window#

  3. Go to the detailed setting (Gear icon), select IPv4, and select “Shared to other computers”.

    ../../_images/network_setting_2.png

    Fig. 3.4 Front Network sharing setting#

    With the default, 10.42.0.1 will be set to this interface.

3.2.2.3.2. Manually set IP address on the board#

Use ifconfig to set eth0 to 10.42.0.3

sudo ifconfig eth0 10.42.0.3

After this, please confirm the IP address assigned. The result should be like below.

analog@kria-gmsl :~ $ ip a
1: lo: <LOOPBACK, UP, LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group
default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 :: 1/128 scope host
valid_lft forever preferred_lft forever
2: sit0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN group default qlen 1000
link/sit 0.0.0.0 brd 0.0.0.0
3: eth0: <BROADCAST, MULTICAST, UP, LOWER_UP> mtu 9000 qdisc mq state UP group
default qlen 1000
link/ether a2:c2:aa:da:45:73 brd ff : ff: ff:ff:ff:ff
inet 10.42.0.3/8 brd 10.255.255.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80 :: a0c2:aaff:feda:4573/64 scope link
valid_lft forever preferred_1ft forever

You can confirm that IP address is assigned as intended by checking inet 10.42.0.3.

3.2.2.3.3. Set a systemd network file#

Write the following file to /etc/systemd/network/10-static.network

[Match]
Name=eth0

[Network]
DHCP=no
Address=10.42.0.3

[Link]
MTUBytes=9000

This also fixes the eth0 IP address to 10.42.0.3.

3.2.3. Image output configuration#

To configure the GMSL board via CUI, you need to log in to the board. To do that, two methods are available.

  • Via SSH

  • Via serial Console

3.2.3.1. Login via SSH#

Two IP addresses are assigned to the GMSL board’s ethernet port.

  • IP address for image data output (fixed as 10.42.0.2 by default)

  • IP address for login (assigned randomly by default)

Here, we will log in to the GMSL board by using the IP address for login.

  1. In the case you assign the IP address via DHCP, the IP address will be assigned randomly. We will scan the available IP address by using arp command.

    arp

    will return a similar result as the following.

    ubuntu@EAC-5000:~$ arp
Address                  HWtype  HWaddress           Flags Mask            Iface
10.42.0.63               ether   66:4d:9a:96:5a:68   C                     eth1

    10.42.0.63 is the IP address assigned this time.

  2. Log in to the GMSL board by using SSH to configure image output settings, using the following user name and password.

    • Username: analog

    • Password: analog

    ssh analog@<assigned ip address>

  3. If successful, the output will be similar to the following:

    ubuntu@EAC-5000:~$ ssh analog@10.42.0.63
analog@10.42.0.63's password:(Put <analog> here)
Welcome to Ubuntu 22.04.3 LTS (GNU/Linux 6.1.5-g19e31fe4c1ae-dirty aarch64)

* Documentation:  https://help.ubuntu.com
* Management:     https://landscape.canonical.com
* Support:        https://ubuntu.com/advantage

This system has been minimized by removing packages and content that are
not required on a system that users do not log into.

...

See also

You can log-in to the board by using the hostname based on the mDNS. To do so, please login with the kria-gmsl.local. For instance, the command below should works.

ssh analog@kria-gmsl.local

3.2.3.2. Login via serial console#

In case you need to log in via the serial console, please follow this procedure:

  1. Connect the USB cable that is connected to the serial console to the HOST PC.

  2. Confirm if the serial port is recognized by PC. ls -al /dev/ttyUSB* should return ttyUSB device.

    ubuntu@EAC-5000:~$ ls -al /dev/ttyUSB*
crw-rw---- 1 root dialout 188, 0 Aug  8 04:07 /dev/ttyUSB0

  3. add read/write permission by using sudo chmod 666 /dev/ttyUSB0.

  4. There are some options to use the serial console. In this document, we use gtkterm for it. To install gtkterm, please follow the following.

    sudo apt update
sudo apt install gtkterm

  5. Open the gtkterm (by typing gtkterm in the terminal). Then select configuration. Select /dev/ttyUSB0 in the Port setting. Also, make sure the Baud Rate is set to 115200.

    ../../_images/serial_setting_1.png

    Fig. 3.5 Front Serial console setting (in the case of gtkterm)#

  6. Click OK.

  7. A login message should appear (if not, press ENTER).

  8. Enter analog as a login user and enter analog as a password.

    ../../_images/serial_setting_2.png

    Fig. 3.6 Output in case of successful connection#

3.2.4. Next Step#

Please proceed Image output settings via CUI or Image output settings via GUI to configure the board to display the image from the cameras.