The Ångström Linux distribution
The Ångström distribution contains four major components. They are shown below in the order in which you must copy them to the SD card, as the bootloaders must appear first on the card:
·First-stage bootloader
·Second-stage bootloader
·Linux boot image (uImage)
·Linux file system
The Beagle Board's firmware contains a first-stage bootloader called X-loader. X-loader can also be loaded from a removable storage space (such as an SD card) in a signed file called MLO. X-loader bootstraps the system only enough to load the second-stage bootloader, which otherwise would not fit into memory.
The second-stage bootloader provided in flash memory on the Beagle Board is U-boot, although most distributions provide their own version of U-boot in a file called u-boot.bin. U-boot initializes the system, then boots the Linux kernel. It can also be run from the console.
The Linux boot image, named uImage, finally boots the Linux kernel, which resides in the Linux file system in the /boot directory.
There are several ways to set up the file system; the method shown here requires a bit of work at the beginning but is flexible. Also note that this is the way the pre-built Ångström SD cards arrive if you order them from Special Computing.
5.4.2 Download the distribution
To assemble the Ångström distribution, the following files are needed:
·Angstrom-Beagleboard-demo-image-glibc-ipk-2009.X-test-20090326-beagleboard.rootfs.tar.bz2
·MLO
·README.txt
·md5sums
·u-boot.bin
·uImage
Double-check that each of the files has downloaded properly.
Navigate to the download directory in a terminal window, type md5sum *, then compare the values for each file with the contents of the file md5sum.
For further proceedings and source download log on to :
Browse packages for your beagleboard : http://www.angstrom-distribution.org/repo/
The Ångström distribution contains four major components. They are shown below in the order in which you must copy them to the SD card, as the bootloaders must appear first on the card:
·First-stage bootloader
·Second-stage bootloader
·Linux boot image (uImage)
·Linux file system
The Beagle Board's firmware contains a first-stage bootloader called X-loader. X-loader can also be loaded from a removable storage space (such as an SD card) in a signed file called MLO. X-loader bootstraps the system only enough to load the second-stage bootloader, which otherwise would not fit into memory.
The second-stage bootloader provided in flash memory on the Beagle Board is U-boot, although most distributions provide their own version of U-boot in a file called u-boot.bin. U-boot initializes the system, then boots the Linux kernel. It can also be run from the console.
The Linux boot image, named uImage, finally boots the Linux kernel, which resides in the Linux file system in the /boot directory.
There are several ways to set up the file system; the method shown here requires a bit of work at the beginning but is flexible. Also note that this is the way the pre-built Ångström SD cards arrive if you order them from Special Computing.
5.4.2 Download the distribution
To assemble the Ångström distribution, the following files are needed:
·Angstrom-Beagleboard-demo-image-glibc-ipk-2009.X-test-20090326-beagleboard.rootfs.tar.bz2
·MLO
·README.txt
·md5sums
·u-boot.bin
·uImage
Double-check that each of the files has downloaded properly.
Navigate to the download directory in a terminal window, type md5sum *, then compare the values for each file with the contents of the file md5sum.
For further proceedings and source download log on to :
Browse packages for your beagleboard : http://www.angstrom-distribution.org/repo/
