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====== Cb1 Making Embedded Linux With Buildroot ======

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//__About this Article__//
  * **Author**: Carlo Caione --- carlo.caione@gmail.com --- 2013/10/24 23:07
  * **Copyrights**: [[http://creativecommons.org/licenses/by-sa/3.0/|CC Attribution-Share Alike 3.0 Unported]]
  * **Contributors**: [[http://cubieboard.org/|Cubieboard Community]] : ...
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===== Abstract =====



===== Intro =====

====About Buildroot ====

Buildroot is a set of Makefiles and patches that makes it easy to generate a complete embedded Linux system. Buildroot can generate any or all of a cross-compilation toolchain, a root filesystem, a kernel image and a bootloader image. Buildroot is useful mainly for people working with small or embedded systems, using various CPU architectures (x86, ARM, MIPS, PowerPC, etc.) : it automates the building process of your embedded system and eases the cross-compilation process.

====Buildroot for Cubieboard====

To be able to use your cubieboard board with the images generated by
Buildroot you have to correctly setup the SD card.

For more information, please see http://linux-sunxi.org/FirstSteps

====Suitable Boards====
Cubieboard get included in Buildroot source recently, including two boards till now
  - Cubieboard1
  - Cubieboard2


===== How to build it =====


You need to use the cubieboard_defconfig or cubieboard2_defconfig, to do so:
 * make cubieboard_defconfig
or
 * make cubieboard2_defconfig

And to compile:
 * make

===== What is generated =====

After building, you should obtain this tree:

    output/images/
    +-- rootfs.tar
    +-- boot.scr
    +-- script.bin
    +-- sunxi-spl.bin
    +-- u-boot.bin
    +-- u-boot-sunxi-with-spl.bin (optional)
    `-- uImage


===== How setting up the SD card =====

Depending on the rootfs size, you might want to use a 2GB or larger SD-card.
The script mkcubiecard.sh will take care of partitioning and formatting
the SD-card.

BEWARE! This process will erase your SD card.

Use dmesg to find out where the SD card is attached in the /dev tree
(<device>) and then:

# sudo ./mkcubiecard.sh <images_dir> <device>

where:
 - <images_dir> is the directory containing the generated files (usually
   output/images)
 - <device> is the device file of the SD card (usually /dev/sdX)



--
Carlo Caione <carlo.caione@gmail.com>


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{{tag>Cubieboard Cubietruck}}
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