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Wiki Markup
This is a page about TI's Cortex-A8 based; BeagleBone Blue.
{hide-comments}
{toc:indent=20px|style=disc}
 
h2. Availability
Boards:
[BeagleBone Blue|https://www.digikey.com/product-search/en?keywords=BBBLE-SC-568-ND] at Digi-Key
 
h2. Basic Requirements
* Running a recent supported release of Debian, Fedora or Ubuntu on a x86 64bit based PC; without OS Virtualization Software.
* Many of the listed commands assume /bin/bash as the default shell.
* ARM Cross Compiler -- Linaro: [https://www.linaro.org]
** Linaro Toolchain Binaries: [https://www.linaro.org/downloads/]
* Bootloader
** Das U-Boot -- the Universal Boot Loader: [http://www.denx.de/wiki/U-Boot]
** Source: [https://github.com/u-boot/u-boot/]
* Linux Kernel
** Linus's Mainline tree: [https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git]
* ARM based rootfs
** Debian: [https://www.debian.org]
** Ubuntu: [https://www.ubuntu.com]
 
h2. ARM Cross Compiler: GCC
This is a pre-built (64bit) version of GCC that runs on generic linux, sorry (32bit) x86 users, it's time to upgrade...
Download/Extract:
{code:title=user@localhost:~$}
wget -c https://releases.linaro.org/components/toolchain/binaries/6.5-2018.12/arm-linux-gnueabihf/gcc-linaro-6.5.0-2018.12-x86_64_arm-linux-gnueabihf.tar.xz
tar xf gcc-linaro-6.5.0-2018.12-x86_64_arm-linux-gnueabihf.tar.xz
export CC=`pwd`/gcc-linaro-6.5.0-2018.12-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-
{code}
Test Cross Compiler:
{code:title=user@localhost:~$}
${CC}gcc --version
{code}
{code:title=Test Output:}
arm-linux-gnueabihf-gcc (Linaro GCC 6.5-2018.12) 6.5.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
{code}
 
h2. Bootloader: U-Boot
Das U-Boot -- the Universal Boot Loader: [http://www.denx.de/wiki/U-Boot]
eewiki.net patch archive: [https://github.com/eewiki/u-boot-patches]
Download:
{code:title=user@localhost:~$}
git clone -b v2019.04 https://github.com/u-boot/u-boot --depth=1
cd u-boot/
{code}
Patches:
{code:title=user@localhost:~/u-boot$}
wget -c https://github.com/eewiki/u-boot-patches/raw/master/v2019.04/0001-am335x_evm-uEnv.txt-bootz-n-fixes.patch
wget -c https://github.com/eewiki/u-boot-patches/raw/master/v2019.04/0002-U-Boot-BeagleBone-Cape-Manager.patch
 
patch -p1 < 0001-am335x_evm-uEnv.txt-bootz-n-fixes.patch
patch -p1 < 0002-U-Boot-BeagleBone-Cape-Manager.patch
{code}
Configure and Build:
{code:title=user@localhost:~/u-boot$}
make ARCH=arm CROSS_COMPILE=${CC} distclean
make ARCH=arm CROSS_COMPILE=${CC} am335x_evm_defconfig
make ARCH=arm CROSS_COMPILE=${CC}
{code}
 
h2. Linux Kernel
This script will build the kernel, modules, device tree binaries and copy them to the deploy directory.
h3. TI BSP
Download:
{code:title=~/}
git clone https://github.com/RobertCNelson/ti-linux-kernel-dev.git
cd ti-linux-kernel-dev/
{code}
For TI v4.14.x:
{code:title=~/ti-linux-kernel-dev/}
git checkout origin/ti-linux-4.14.y -b tmp
{code}
For TI v4.14.x: Real-Time
{code:title=~/ti-linux-kernel-dev/}
git checkout origin/ti-linux-rt-4.14.y -b tmp
{code}
For TI v4.19.x:
{code:title=~/ti-linux-kernel-dev/}
git checkout origin/ti-linux-4.19.y -b tmp
{code}
For TI v4.19.x: Real-Time
{code:title=~/ti-linux-kernel-dev/}
git checkout origin/ti-linux-rt-4.19.y -b tmp
{code}
For TI v5.4.x:
{code:title=~/ti-linux-kernel-dev/}
git checkout origin/ti-linux-5.4.y -b tmp
{code}
For TI v5.4.x: Real-Time
{code:title=~/ti-linux-kernel-dev/}
git checkout origin/ti-linux-rt-5.4.y -b tmp
{code}
Build:
{code:title=user@localhost:~/ti-linux-kernel-dev$}
./build_kernel.sh
{code}
 
h2. Root File System
h3. Debian 10
|| User || Password ||
| debian | temppwd |
| root | root |
Download:
{code:title=user@localhost:~$}
wget -c https://rcn-ee.com/rootfs/eewiki/minfs/debian-10.4-minimal-armhf-2020-05-10.tar.xz
{code}
 
Verify:
{code:title=user@localhost:~$}
sha256sum debian-10.4-minimal-armhf-2020-05-10.tar.xz
{code}
{code:title=sha256sum output:}
cd598e42850cbef87602bf15ee343abfbf0d8c6ba81028c741672b5f24263534  debian-10.4-minimal-armhf-2020-05-10.tar.xz
{code}
 
Extract:
{code:title=user@localhost:~$}
tar xf debian-10.4-minimal-armhf-2020-05-10.tar.xz
{code}
 
h3. Ubuntu 20.04 LTS
|| User || Password ||
| ubuntu | temppwd |
Download:
{code:title=user@localhost:~$}
wget -c https://rcn-ee.com/rootfs/eewiki/minfs/ubuntu-20.04-minimal-armhf-2020-05-10.tar.xz
{code}
 
Verify:
{code:title=user@localhost:~$}
sha256sum ubuntu-20.04-minimal-armhf-2020-05-10.tar.xz
{code}
{code:title=sha256sum output:}
de0177ac9259fdbcc626ee239f4258b64070c0921dbc38c45fab6925a5becaa1  ubuntu-20.04-minimal-armhf-2020-05-10.tar.xz
{code}
 
Extract:
{code:title=user@localhost:~$}
tar xf ubuntu-20.04-minimal-armhf-2020-05-10.tar.xz
{code}
 
h2. Setup microSD card
We need to access the External Drive to be utilized by the target device. Run lsblk to help figure out what linux device has been reserved for your External Drive.
{code:title=Example: for DISK=/dev/sdX}
lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0 465.8G  0 disk
├─sda1   8:1    0   512M  0 part /boot/efi
└─sda2   8:2    0 465.3G  0 part /                <- Development Machine Root Partition
sdb      8:16   1   962M  0 disk                  <- microSD/USB Storage Device
└─sdb1   8:17   1   961M  0 part                  <- microSD/USB Storage Partition
{code}
{code:title=Thus you would use:}
export DISK=/dev/sdb
{code}
{code:title=Example: for DISK=/dev/mmcblkX}
lsblk
NAME      MAJ:MIN   RM   SIZE RO TYPE MOUNTPOINT
sda         8:0      0 465.8G  0 disk
├─sda1      8:1      0   512M  0 part /boot/efi
└─sda2      8:2      0 465.3G  0 part /                <- Development Machine Root Partition
mmcblk0     179:0    0   962M  0 disk                  <- microSD/USB Storage Device
└─mmcblk0p1 179:1    0   961M  0 part                  <- microSD/USB Storage Partition
{code}
{code:title=Thus you would use:}
export DISK=/dev/mmcblk0
{code}
 
Erase partition table/labels on microSD card:
{code}
sudo dd if=/dev/zero of=${DISK} bs=1M count=10
{code}
 
Install Bootloader:
{code:title=user@localhost:~$}
sudo dd if=./u-boot/MLO of=${DISK} count=1 seek=1 bs=128k
sudo dd if=./u-boot/u-boot.img of=${DISK} count=2 seek=1 bs=384k
{code}
Create Partition Layout:
With util-linux v2.26, sfdisk was rewritten and is now based on libfdisk.
{code:title=Check the version of sfdisk installed on your pc}
sudo sfdisk --version
{code}
{code:title=Example Output}
sfdisk from util-linux 2.27.1
{code}
{code:title=sfdisk >= 2.26.x}
sudo sfdisk ${DISK} <<-__EOF__
4M,,L,*
__EOF__
{code}
{code:title=sfdisk <= 2.25.x}
sudo sfdisk --unit M ${DISK} <<-__EOF__
4,,L,*
__EOF__
{code}
 
Format Partition:
{code}
for: DISK=/dev/mmcblkX
sudo mkfs.ext4 -L rootfs ${DISK}p1
 
for: DISK=/dev/sdX
sudo mkfs.ext4 -L rootfs ${DISK}1
{code}
Mount Partition:
*On most systems these partitions may be auto-mounted...*
{code}
sudo mkdir -p /media/rootfs/
 
for: DISK=/dev/mmcblkX
sudo mount ${DISK}p1 /media/rootfs/
 
for: DISK=/dev/sdX
sudo mount ${DISK}1 /media/rootfs/
{code}
 
h2. Install Kernel and Root File System
To help new users, since the kernel version can change on a daily basis. The kernel building scripts listed on this page will now give you a hint of what kernel version was built.
{code}
-----------------------------
Script Complete
eewiki.net: [user@localhost:~$ export kernel_version=5.X.Y-Z]
-----------------------------
{code}
 
Copy and paste that "export kernel_version=5.X.Y-Z" exactly as shown in your own build/desktop environment and hit enter to create an environment variable to be used later.
{code}
export kernel_version=5.X.Y-Z
{code}
 
h3. Copy Root File System
{code:title=user@localhost:~$}
sudo tar xfvp ./*-*-*-armhf-*/armhf-rootfs-*.tar -C /media/rootfs/
sync
sudo chown root:root /media/rootfs/
sudo chmod 755 /media/rootfs/
{code}
 
h3. Set uname_r in /boot/uEnv.txt
{code:title=user@localhost:~$}
sudo sh -c "echo 'uname_r=${kernel_version}' >> /media/rootfs/boot/uEnv.txt"
{code}
 
h3. Copy Kernel Image
Kernel Image:
{code:title=user@localhost:~$}
sudo cp -v ./ti-linux-kernel-dev/deploy/${kernel_version}.zImage /media/rootfs/boot/vmlinuz-${kernel_version}
{code}
 
h3. Copy Kernel Device Tree Binaries
{code:title=user@localhost:~$}
sudo mkdir -p /media/rootfs/boot/dtbs/${kernel_version}/
sudo tar xfv ./ti-linux-kernel-dev/deploy/${kernel_version}-dtbs.tar.gz -C /media/rootfs/boot/dtbs/${kernel_version}/
{code}
 
h3. Copy Kernel Modules
{code:title=user@localhost:~$}
sudo tar xfv ./ti-linux-kernel-dev/deploy/${kernel_version}-modules.tar.gz -C /media/rootfs/
{code}
 
h3. File Systems Table (/etc/fstab)
{code:title=user@localhost:~/$}
sudo sh -c "echo '/dev/mmcblk0p1  /  auto  errors=remount-ro  0  1' >> /media/rootfs/etc/fstab"
{code}
 
h3. Remove microSD/SD card
{code}
sync
sudo umount /media/rootfs
{code}
 
h2. Comments
Any questions or comments please go to our TechForum: [TechForum|https://forum.digikey.com/c/linux-on-arm/]

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