AM6442: Automatically bring up CAN network interfaces on boot

Hi,

In order to automate the process, you can use systemd service in linux to automatically run the required commands for establishing CAN communication.

An example: 

Unit
Description=My Server
StartLimitIntervalSec=0

Service
Type=Simple
ExecStart=/usr/sbin/1.sh
Restart=always
RestartSec=20

Install
WantedBy=multi-user.target

1.sh →
            
#!/bin/bash
<insert commands> 
reboot
sleep 1000
echo `date` >> /tmp/2

Regards,
Aparna

Hi Aparna Patra,

Can you show me how to add this to the yocto build?

Thanks!

Hi,

You don't need to add this into an Yocto build.

1. Please add your .service file into the following location:

root@am62xx-evm:/etc/systemd/system# ls                                         
basic.target.wants                      graphical.target.wants                  
bluetooth.target.wants                  local-fs.target.wants                   
ctrl-alt-del.target                     multi-user.target.wants                 
dbus-org.bluez.service                  network-online.target.wants             
dbus-org.freedesktop.Avahi.service      sockets.target.wants                    
dbus-org.freedesktop.network1.service   sync-clocks.service                     
dbus-org.freedesktop.resolve1.service   sysinit.target.wants                    
dbus-org.freedesktop.timesync1.service  systemd-hostnamed.service               
dbus.service                            systemd-random-seed.service.wants       
default.target                          systemd-udevd.service                   
getty.target.wants                      timers.target.wants                     
root@am62xx-evm:/etc/systemd/system# 

Then, you can auto run your service routine, by using the commands:

2. Now that the service file is in /etc/systemd/system folder, run the
following command to update System Daemon.
systemctl daemon-reload

3. To test that System Daemon, start the service by use the
following command:
systemctl start <name-of-sevice>.service

4. After test works, make the service autostart by using the following command:
systemctl enable <name-of-sevice>.service

Regards,
Aparna

Hi Aparna Patra,

Thank you for your answer!

But I have a large number of products, so I want to include it in the build so I can program it once into the product.

Hi,

Please refer: https://software-dl.ti.com/processor-sdk-linux/esd/AM62X/10_00_07_04/exports/docs/linux/Overview_Building_the_SDK.html

Regards,
Aparna