Udoo

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Download and create uSD card

Create microSD from image

http://www.udoo.org/getting-started/creating-a-bootable-micro-sd-card-from-image/ 

sudo umount /dev/sdc*
sudo dd bs=4M if=~/Downloads/udoo_dual_ubuntu1204_v2.0.img of=/dev/sdc # take 15 minutes on a 32GB class 10 uSD card
sudo sync
df -h # find out <sd_label> in /media/<sd_label>
sudo umount /media/<sd_label>
  • Follow this post to extend the size of /dev/root to the SD card capacity. Note that the first command is fdisk /dev/mmcblk0 ('f' is lost there). The operations can be done in a live session (i.e. udoo is in action) similar to the Beaglebone case. Another way is to use the Udoo Configuration Tool. However, both methods do not work very well. The first method cannot boot and the second method can only extend up to 15GB. A better way is to use Gparted program (Linux OS) and work on this on another computer. Gparted allows me to fully use 32GB uSD card.

Create microSD from binaries

We first download the binaries from http://www.udoo.org/downloads/#tab2. Then we follow the instruction in http://elinux.org/UDOO#Creating_a_bootable_Micro_SD_card_from_binaries to create the microSD card. This method works for Debian, Ubuntu, Linaro OS.

Back up/Save to microSD card

Suppose my microSD card is on /dev/sdc. 

sudo dd bs=1M if=/dev/sdc of=~/Udoo-backup.bin
sudo dd bs=1M if=~/Udoo-backup.bin of=/dev/sdc

u-boot

http://www.linuxjournal.com/content/handy-u-boot-trick

Udoobuntu

For some reason, the system freezes about 25 minutes (shown on htop screen). Maybe it is because the version is beta.

(Update) The 1.0 stable looks better. No more freeze. Since v1.0 is based on Ubuntu 12.04, the gcc is quite old (v4.6.3).

If we want to create an image based on ubuntu 14.04, we can follow the following posts:

Android 4.3 Jelly Bean

Works fine. Installing gapps also works too. Youtube app does not work so don't bother to install it from Google app store.

Debian Wheezy armHF

The <udoo_dual_debian_wheezy_armhf_v1.1.zip> released on 2014-04-07 is based on debian wheezy 7.4. The gcc version is 4.6.3. The web browser is Iceweasel. Running sudo apt-get update and sudo apt-get install gcc-4.7 will result in an error.

Arduino Programming

http://www.elinux.org/UDOO_programming_the_embedded_Arduino_microcontroller

From Udoo itself

I can use dmesg | grep ttymxc3 to double check the device is attached.

Use sudo ln -sf /dev/ttymxc3 /dev/ttyS0 each time we boot the Ubuntu (or add it to the local.rc file to ensure it occurs on each boot) . See the forum discussion.

Simple LED sketch works well.

The Ethernet webServer sketch does not work. Why?

On an External computer

First I unplug J18 jumper, remove microSD card, and connect microUSB to CN6 in UDOO.

Download the official Arduino IDE 1.5.4.

I try to use dmesg | grep cp210x to check the device. The obstacle is the device is not found in Arduino IDE (No device found on ttyUSB0). If I try to follow 'Serial Driver' part to download and run 'make' , I will get an error 

Linux_3.x.x_VCP_Driver_Source/cp210x.c:164:12: Error： 'usb_serial_probe' undeclared here (not in a function)
Linux_3.x.x_VCP_Driver_Source/cp210x.c:165:16: Error :  'usb_serial_disconnect' undeclared here (not in a function)

Serial port monitor

http://www.udoo.org/ProjectsAndTutorials/connecting-via-serial-cable/

On Linux, I can use minicom program to monitor serial port. We can install it by using 'sudo apt-get install minicom'.

Use sudo minicom -s to configure minicom first. Make sure the serial port is correct. For example, use /dev/ttyS0 when we use UDOO and dev/ttyUSB0 when we use external PC. The baud rate is set to 9600 8N1 and that 'Hardware flow control' is set to 'no'. Once we are done with the settings, use 'Save setup as dfl' and minicom will start up with the correct settings next time.

We shall not launch minicom immediately. We shall let Arduino IDE to finish uploading a sketch and then we can launch minicom. We can quit minicom by using Ctrl+A and z and x. If we start minicom before Arduino IDE finishes uploading a sketch, Arduino IDE will not be able to upload successfully; it will show an error 'no device found on /dev/ttyS0'.

Misc

After installing Udoobuntu

  • Take a look at the Lubuntu wikipedia page to see what applications are suitable to use in a system like Udoo. Udoobuntu use LXDE desktop environment as Lubuntu.
  • Don't use Chromium browser. It is too heavy (use too several hundred MB memory). NetSurf is light and responsive. Ephphany looks more heavy and its responds are slower.

Disk partition for an Android system

The following image shows the partitions in microSD card with an Android OS (4.2.2?) installed.

AndroidMicroSD.png

and the partitions of a brand new microSD card

NewSD Partition.png

Install Gapps in Android

The real sdcX number can be found by using 'df -h' command (my computer already has 2 hard disks, so a USB drive goes to /dev/sdc). 

sudo umount /dev/sdc* 

# Unpack the zip in a local temp directory.
mkdir gapps
sudo unzip gapps-jb-20130812-signed.zip -d gapps
cd gapps

sudo mkdir /mnt/sdc5
df -h # find /media/brb/data1 partition

# Mount partition 5 
sudo mount /dev/sdc5 /mnt/sdc5

# See what's in /mnt/sdc5 before the operation (optional)
$ ls /mnt/sdc5
anr       app-lib      dalvik-cache  drm         media     resource-cache  user
app       app-private  data          local       misc      ssh
app-asec  backup       dontpanic     lost+found  property  system

# Rsync everything from the “system” folder in the zip file to the mounted partition.
sudo rsync -avu system/* /mnt/sdc5/

# See what's in /mnt/sdc5 after the operation (optional)
$ ls /mnt/sdc5
addon.d   app-lib       data       framework   media           ssh     usr
anr       app-private   dontpanic  lib         misc            system
app       backup        drm        local       property        tts
app-asec  dalvik-cache  etc        lost+found  resource-cache  user
brb@brb-P45T-A:~/Downloads/gapps$ 

# Unmount SD, put it in the UDOO, and voilà,
sudo umount /mnt/sdc5

Update: 

# Before doing rsync
$ ls /mnt/sdc5
app  bin  build.prop  etc  fonts  framework  lib  lost+found  media  usr  vendor  xbin

$ sudo rsync -avu system/* /mnt/sdc5/
sending incremental file list
addon.d/
addon.d/70-gapps.sh
app/
app/ChromeBookmarksSyncAdapter.apk
app/ConfigUpdater.apk
app/GenieWidget.apk
app/Gmail.apk
app/GmsCore.apk
app/GoogleBackupTransport.apk
app/GoogleCalendarSyncAdapter.apk
app/GoogleContactsSyncAdapter.apk
app/GoogleEars.apk
app/GoogleFeedback.apk
app/GoogleLoginService.apk
app/GooglePartnerSetup.apk
app/GooglePlus.apk
app/GoogleServicesFramework.apk
app/GoogleTTS.apk
app/LatinImeDictionaryPack.apk
app/MediaUploader.apk
app/NetworkLocation.apk
app/Phonesky.apk
app/SetupWizard.apk
app/TalkBack.apk
app/VoiceSearchStub.apk
etc/
etc/g.prop
etc/permissions/
etc/permissions/com.google.android.maps.xml
etc/permissions/com.google.android.media.effects.xml
etc/permissions/com.google.widevine.software.drm.xml
etc/permissions/features.xml
etc/preferred-apps/
etc/preferred-apps/google.xml
framework/
framework/com.google.android.maps.jar
framework/com.google.android.media.effects.jar
framework/com.google.widevine.software.drm.jar
lib/
lib/libAppDataSearch.so
lib/libRSSupport.so
lib/libfilterpack_facedetect.so
lib/libfrsdk.so
lib/libgames_rtmp_jni.so
lib/libgcomm_jni.so
lib/libgoogle_recognizer_jni.so
lib/libgoogle_recognizer_jni_l.so
lib/libgtalk_jni.so
lib/libgtalk_stabilize.so
lib/libpatts_engine_jni_api.so
lib/libplus_jni_v8.so
lib/librs.antblur.so
lib/librs.antblur_constant.so
lib/librs.antblur_drama.so
lib/librs.drama.so
lib/librs.film_base.so
lib/librs.fixedframe.so
lib/librs.grey.so
lib/librs.image_wrapper.so
lib/librs.retrolux.so
lib/librsjni.so
lib/libspeexwrapper.so
lib/libvcdecoder_jni.so
lib/libvorbisencoder.so
lib/libwebp_android.so
tts/
tts/lang_pico/
tts/lang_pico/de-DE_gl0_sg.bin
tts/lang_pico/de-DE_ta.bin
tts/lang_pico/es-ES_ta.bin
tts/lang_pico/es-ES_zl0_sg.bin
tts/lang_pico/fr-FR_nk0_sg.bin
tts/lang_pico/fr-FR_ta.bin
tts/lang_pico/it-IT_cm0_sg.bin
tts/lang_pico/it-IT_ta.bin
usr/
usr/srec/
usr/srec/en-US/
usr/srec/en-US/acoustic_model
usr/srec/en-US/c_fst
usr/srec/en-US/clg
usr/srec/en-US/compile_grammar.config
usr/srec/en-US/contacts.abnf
usr/srec/en-US/dict
usr/srec/en-US/dictation.config
usr/srec/en-US/embed_phone_nn_model
usr/srec/en-US/embed_phone_nn_state_sym
usr/srec/en-US/endpointer_dictation.config
usr/srec/en-US/endpointer_voicesearch.config
usr/srec/en-US/ep_acoustic_model
usr/srec/en-US/g2p_fst
usr/srec/en-US/google_hotword.config
usr/srec/en-US/google_hotword_clg
usr/srec/en-US/google_hotword_logistic
usr/srec/en-US/grammar.config
usr/srec/en-US/hmmsyms
usr/srec/en-US/hotword_symbols
usr/srec/en-US/lintrans_model
usr/srec/en-US/metadata
usr/srec/en-US/norm_fst
usr/srec/en-US/normalizer
usr/srec/en-US/offensive_word_normalizer
usr/srec/en-US/phonelist
usr/srec/en-US/rescoring_lm
usr/srec/en-US/symbols

sent 127,944,934 bytes  received 1,855 bytes  255,893,578.00 bytes/sec
total size is 142,001,100  speedup is 1.11

# After doing rsync
$ ls /mnt/sdc5
addon.d  app  bin  build.prop  etc  fonts  framework  lib  lost+found  media  tts  usr  vendor  xbin

flash video

It is better to not expect (too much) to play any flash videos on an ARM-based linux system. Android is an idea choice to play flash videos on an ARM-based operating system.

http://udoo.org/forum/viewtopic.php?f=17&t=137 

sudo apt-get install gnash
sudo apt-get install browser-plugin-gnash
sudo apt-get install firefox
sudo apt-get install gnome-system-tools

Display Size

http://udoo.org/forum/viewtopic.php?f=6&t=119

VNC

http://udoo.org/forum/viewtopic.php?f=6&t=110

This tutorial teaches how to add tightvncserver to rc.local file so it is available on booting. 

# Install tightvncserver
sudo apt-get install tightvncserver

sudo nano /etc/rc.local
# Add the following line before 'exit 0' line.
vncserver :1 -geometry 800x600 -depth 24

UdooThroughVnc.jpg

View Ubuntu 12.04 Desktop on Android (Galaxy tab 8.9) by using bVNC Free - Secure VNC Viewer app.

Look at the boot process via USB to serial interface

Check out this tutorial.

Speed comparison via C program

http://udoo.org/forum/viewtopic.php?f=2&t=470

Clonezilla image of Ubuntu 13.10 with ROS

http://udoo.org/forum/viewtopic.php?f=2&t=147&start=10

Node.js + GPIO

http://udoo.org/forum/viewtopic.php?f=8&t=391

http://udoo.org/forum/viewtopic.php?f=8&t=431 (Installation of Node.js)

Set up Qt

Change time zone

sudo dpkg-reconfigure tzdata
more /etc/timezone
# US/Eastern
sudo service cron stop
sudo service cron start
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