Install Raspberry Pi
The xPL protocol is light enough to run on simple machines such as the Raspberry Pi.
Contents
[hide]Install Raspbian
Several distributions are available for the Raspberry Pi. This wiki bases on the console version of Raspbian.
On a computer, download it and write an SD card:
su cd /tmp wget https://downloads.raspberrypi.org/raspbian_lite_latest
Change root password
sudo su passwd apt-get update
Swap space
Create a swap file:
dd if=/dev/zero of=/root/swapfile bs=1M count=1024 chmod 600 /root/swapfile mkswap /root/swapfile
Enable the swapfile:
swapon /root/swapfile swapon -s free -k
To enable at reboot, edit /etc/fstab:
/root/swapfile swap swap defaults 0 0
Locales
Install locales (for PERL and others):
su locale-gen en_US.UTF-8
Then edit ~.bashrc and add:
export LC_ALL=C
Ethernet
Check the Ethernet connection:
ifconfig | grep inet ping google.com
Connect to the BeagleBone via SSH to continue working (on a larger window).
ssh root@192.168.1.165
Change host name:
nano /etc/hosts change: "127.0.1.1 ubuntu-armhf" to: "127.0.1.1 beagleBoneHostname" nano /etc/hostname
Set up a bonjour discovery:
apt-get install avahi-daemon libnss-mdns
Give a static address:
nano /etc/network/interfaces iface eth0 inet static address 192.168.1.14 gateway 192.168.1.1 netmask 255.255.255.0 dns-nameservers 192.168.1.1 /etc/init.d/networking restart
Set-up Apple FileProtocol (AFP) sharing:
apt-get install netatalk nano /etc/netatalk/AppleVolumes.default
Command-line editing
Enable history search and bash tab autocompletion:
nano .bashrc nano /etc/inputrc apt-get update && apt-get install bash-completion
Install manuals:
apt-get install man-db
Programming tools
Install compilation tools (make, gcc, …):
apt-get install build-essential
Install Perl documentation reader:
apt-get install perl-doc
Local time
Set local time:
ls -lr /usr/share/zoneinfo/Europe/ rm /etc/localtime ln -s /usr/share/zoneinfo/Europe/Zurich /etc/localtime
Update time on a daily basis
with the help of the script /etc/cron.daily/ntpdate containing:
#!/bin/sh ntpdate ntp.ubuntu.com
Make the script executable:
chmod 755 /etc/cron.daily/ntpdate
Control user
Create user
Add the control user:
useradd -m -g users -G users,dialout,audio -s /bin/bash control passwd control
Checks
CPU usage
Check CPU usage:
ps -eo pcpu,user,args | sort -k 1 -r | head -10 echo && ps -eo pcpu,user,args | grep -v ' 0.0 ' | grep -v '%CPU' | sort -k 1 -r | sed 's/[ ^I]\/.*\/perl//' | sed 's/.pl[ ^I].*/.pl/'
Process priorities
Check process priorities:
ps ax -o nice,pid,user,args | grep -v ' NI ' | sort
The lowest numbers correspond to the highest priorities.
Change the priority level of xPL devices:
ps ax -o nice,pid,user,args | grep -v ' grep ' | grep -i xpl-
USER='control'
NEW_LEVEL=-10
SYSTEM_IFS=$IFS; IFS=$'\n';
task_list=(`ps ax -o pid,user,args | grep -v ' grep ' | grep -i '/xpl-'`)
IFS=$SYSTEM_IFS
for item in "${task_list[@]}" ; do
task_id=`echo "${item}" | sed "s/$USER.*//"`
# echo $task_id
renice $NEW_LEVEL -p $task_id >/dev/null
done
ps ax -o nice,pid,user,args | grep -v ' grep ' | grep -i xpl-
Upstart daemons
Check the status of init daemons:
initctl list initctl list | grep xpl-
Links
Here some interesting pages for the installation process:
