EBC Exercise 03 Installing a Beagle OS

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Revision as of 18:33, 12 July 2012 by Yoder (talk | contribs) (Workshop Instructions: Added note about not needed at Rose)
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thumb‎ Embedded Linux Class by Mark A. Yoder

In this class we run The Ångström Distribution on the BeagleBoard. Ångström is a stable and user-friendly distribution of Linux for embedded devices like handhelds, set top boxes and network-attached storage devices and the BeagleBoard.

Here's how to load the Ångström image we'll be using on an SD card. First get a microSD card that holds at least 4G.

Download a copy of the Ångström image

Download a copy of the image here. You'll see several files here. You want to download ETC2012.img.bz2 and ETC2012.img.bz2.md5. The first is some 1.5G, so it will take a while. The second is a check sum file for the first.

Once you have the two files and the card, what you do with them depends on what OS you are running.

Writing an SD card via Linux

If you are running Linux type:

host$ md5sum ETC2012.img.bz2
host$ cat ETC2012.img.bz2.md5

The two command should show the same thing

6610e1ea35febc5e9016734213bdba68  ETC2012.img.bz2

If your results match you have successfully downloaded the image and can move on. If they don't match, try downloading again. If that doesn't work, contact me.

Next uncompress the image.

host$ bunzip2 -k ETC2012.img.bz2 

The -k says to keep the compressed file. This will take a few minutes.

Insert your microSD card in a reader/writer and find the path to it by running System:Administration:Disk Utility. You will see

Screenshot-Disk Utility.png

The path is in the upper right.

Then enter (if you're using Ubuntu, note the use of the sudo command):

host$ sudo dd if=ETC2012.img  of=/dev/sdX bs=256M
host$ sync

Where /dev/sdX is the path to your SD card. This may take 10 minutes. Mine took about 7.5.

An alternative recipe is to uncompress and write the content to your SD card all in one move (again, if you're using Ubuntu, note the need for sudo):

host$ bunzip2 -c ETC2012.img.bz2 | sudo dd of=/dev/sdX bs=256M

so that you don't have to uncompress the image file first.

Workshop Instructions (not needed at Rose)

If you are on the Rose campus you'll have DHCP and your beagle will be assigned an IP address. If you don't have DHCP you need to pick a static address for your beagle. Here's how you do it.

beagle$ gedit /etc/resolv.conf

Make it look like



beagle$ gedit /usr/networking/interfaces

Search for usb0 and change that section to:

# Ethernet/RNDIS gadget (g_ether) or LAN9514
auto usb0
iface usb0 inet static
address 192.168.70.XXX

Where XXX is the number printed on top of your Desktop computer.

Finally restart the network.

beagle$ /etc/init.d/network restart

Test it with:

beagle$ nslookup google.com

This should find the IP address for google. If not, get help.

Writing an SD card via Windows

The following instructions come from here.

To initialize your card under Windows, you can do the following:

  1. Download and install Ubuntu's Win32DiskImager (also known as the win32-image-writer).
  2. Download and install 7-zip compression software. (Or use winRAR)
  3. Decompress ETC2012.img.bz2 image file using 7-zip (or winRAR).
  4. Insert >=4GB SD card into the reader/writer.
  5. Start the Win32DiskImager.
  6. Select ETC2012.img and correct SD card location.
  7. Click on Write.

After the image writing is done (this will take some 10 minutes), eject the SD card.

Boot your Beagle

You should now have a functioning SD card image. Plug it into your BeagleBoard and boot it up.

While the root password used to be test, there appears to be no password on the root account in this image.

thumb‎ Embedded Linux Class by Mark A. Yoder