Article original : home of the Linux on ARM space Créé par Robert Nelson

This is a page about Olimex’s Allwinner based A20 Boards; A20-OLinuXino-LIME, A20-OLinuXino-LIME2, A20-OLinuXino_MICRO.

Availability

Boards:
A20-OLinuXino-LIME at Digi-Key
A20-OLinuXino-MICRO at Digi-Key
A20-OLinuXino-MICRO-4GB at Digi-Key

Accessories:
USB-SERIAL-CABLE-F at Digi-Key
A10-OLinuXino-LIME-BOX at Digi-Key

Notes

Power via standard dc wall jack, there doesn’t seem to be enough power via usb.

Vendor Documentation

Basic Requirements

ARM Cross Compiler: GCC

This is a pre-built (64bit) version of Linaro GCC that runs on generic linux, sorry (32bit) x86 users, it’s time to upgrade…
Download/Extract:

~/
wget -c https://releases.linaro.org/components/toolchain/binaries/5.3-2016.05/arm-linux-gnueabihf/gcc-linaro-5.3.1-2016.05-x86_64_arm-linux-gnueabihf.tar.xz
tar xf gcc-linaro-5.3.1-2016.05-x86_64_arm-linux-gnueabihf.tar.xz
export CC=`pwd`/gcc-linaro-5.3.1-2016.05-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-

Test:

~/
${CC}gcc --version
arm-linux-gnueabihf-gcc (Linaro GCC 5.3-2016.05) 5.3.1 20160412
Copyright (C) 2015 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.

Bootloader: U-Boot

Das U-Boot – the Universal Boot Loader: [http://www.denx.de/wiki/U-Boot] Download:

~/
git clone https://github.com/u-boot/u-boot
cd u-boot/
git checkout v2017.01-rc1 -b tmp

Configure and Build:
A20-OLinuXino-Lime

~/u-boot
make ARCH=arm CROSS_COMPILE=${CC} distclean
make ARCH=arm CROSS_COMPILE=${CC} A20-OLinuXino-Lime_defconfig
make ARCH=arm CROSS_COMPILE=${CC}

A20-OLinuXino-Lime2

~/u-boot
make ARCH=arm CROSS_COMPILE=${CC} distclean
make ARCH=arm CROSS_COMPILE=${CC} A20-OLinuXino-Lime2_defconfig
make ARCH=arm CROSS_COMPILE=${CC}

A20-OLinuXino-MICRO

~/u-boot
make ARCH=arm CROSS_COMPILE=${CC} distclean
make ARCH=arm CROSS_COMPILE=${CC} A20-OLinuXino_MICRO_defconfig
make ARCH=arm CROSS_COMPILE=${CC}

Linux Kernel

This script will build the kernel, modules, device tree binaries and copy them to the deploy directory. Download:

~/
git clone https://github.com/RobertCNelson/armv7-lpae-multiplatform
cd armv7-lpae-multiplatform/

For v4.4.x (Longterm 4.4.x):

~/armv7-lpae-multiplatform
git checkout origin/v4.4.x -b tmp

For v4.9.x (Longterm 4.9.x):

~/armv7-lpae-multiplatform
git checkout origin/v4.9.x -b tmp

For v4.8.x (Stable):

~/armv7-lpae-multiplatform
git checkout origin/v4.8.x -b tmp

Build:

./build_kernel.sh

Root File System

Debian 8

User Password
debian temppwd
root root

Download:

~/
wget -c https://rcn-ee.com/rootfs/eewiki/minfs/debian-8.6-minimal-armhf-2016-09-17.tar.xz

Verify:

~/
sha256sum debian-8.6-minimal-armhf-2016-09-17.tar.xz
1058e733f245ac0476b96d9583b3c185e3c151d3eebcedc286576ea81ccdd907  debian-8.6-minimal-armhf-2016-09-17.tar.xz

Extract:

~/
tar xf debian-8.6-minimal-armhf-2016-09-17.tar.xz

Ubuntu 16.04 LTS

User Password
ubuntu temppwd

Download:

~/
wget -c https://rcn-ee.com/rootfs/eewiki/minfs/ubuntu-16.04.1-minimal-armhf-2016-09-17.tar.xz

Verify:

~/
sha256sum ubuntu-16.04.1-minimal-armhf-2016-09-17.tar.xz
2883cdd3416e0bd5988aa351c88db72ca089a184c5a670662d750568ca0869d8  ubuntu-16.04.1-minimal-armhf-2016-09-17.tar.xz

Extract:

~/
tar xf ubuntu-16.04.1-minimal-armhf-2016-09-17.tar.xz

Root File System (small flash)

A Root File System around 100Mb in size, for flash applications.

Debian 8 (small flash)

User Password
debian temppwd
root root

Download:

~/
wget -c https://rcn-ee.com/rootfs/eewiki/barefs/debian-8.6-bare-armhf-2016-09-17.tar.xz

Verify:

~/
sha256sum debian-8.6-bare-armhf-2016-09-17.tar.xz
93f88fe892adf8cb01d3e8829f02827a3d991f68497aeb929770dc3a21400614  debian-8.6-bare-armhf-2016-09-17.tar.xz

Extract:

~/
tar xf debian-8.6-bare-armhf-2016-09-17.tar.xz

Setup microSD card

For these instruction we are assuming, DISK=/dev/mmcblk0, lsblk is very useful for determining the device id.

export DISK=/dev/mmcblk0

Erase partition table/labels on microSD card:

sudo dd if=/dev/zero of=${DISK} bs=1M count=10

Install Bootloader:

~/
sudo dd if=./u-boot/u-boot-sunxi-with-spl.bin of=${DISK} seek=8 bs=1024

Create Partition Layout: With util-linux v2.26, sfdisk was rewritten and is now based on libfdisk.
sfdisk

sudo sfdisk --version
sfdisk from util-linux 2.27.1

sfdisk >= 2.26.x

sudo sfdisk ${DISK} <<-__EOF__
1M,,L,*
__EOF__

sfdisk <= 2.25.x

sudo sfdisk --unit M ${DISK} <<-__EOF__
1,,L,*
__EOF__

Format Partition:

# for: DISK=/dev/mmcblk0
sudo mkfs.ext4 -L rootfs ${DISK}p1
 
# for: DISK=/dev/sdX
sudo mkfs.ext4 -L rootfs ${DISK}1

Mount Partition:
On most systems these partitions may will be auto-mounted…

sudo mkdir -p /media/rootfs/
 
# for: DISK=/dev/mmcblk0
sudo mount ${DISK}p1 /media/rootfs/
 
# for: DISK=/dev/sdX
sudo mount ${DISK}1 /media/rootfs/

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.

-----------------------------
Script Complete
eewiki.net: [user@localhost:~$ export kernel_version=4.X.Y-Z]
-----------------------------

Copy and paste that “export kernel_version=4.X.Y-Z” exactly as shown in your own build/desktop environment and hit enter to create an environment variable to be used later.

cat armv7-lpae-multiplatform/kernel_version   # pour avoir la version du kernel compilé
export kernel_version=$(cat armv7-lpae-multiplatform/kernel_version) 

Copy Root File System

A ou B
A-Root File System

#sudo tar xfvp ./*-*-*-armhf-*/armhf-rootfs-*.tar -C /media/rootfs/
sudo tar xfvp debian-8.6-minimal-armhf-2016-09-17/armhf-rootfs-debian-jessie.tar -C /media/rootfs

B-Root File System Small Flash

sudo tar xfvp debian-8.6-bare-armhf-2016-09-17/armhf-rootfs-debian-jessie.tar -C /media/rootfs

Setup extlinux.conf

~/
sudo mkdir -p /media/rootfs/boot/extlinux/
sudo sh -c "echo 'label Linux ${kernel_version}' > /media/rootfs/boot/extlinux/extlinux.conf"
sudo sh -c "echo '    kernel /boot/vmlinuz-${kernel_version}' >> /media/rootfs/boot/extlinux/extlinux.conf"
sudo sh -c "echo '    append root=/dev/mmcblk0p1 ro rootwait quiet' >> /media/rootfs/boot/extlinux/extlinux.conf"
sudo sh -c "echo '    fdtdir /boot/dtbs/${kernel_version}/' >> /media/rootfs/boot/extlinux/extlinux.conf"

Copy Kernel Image

Kernel Image:

~/
sudo cp -v ./armv7-lpae-multiplatform/deploy/${kernel_version}.zImage /media/rootfs/boot/vmlinuz-${kernel_version}

Copy Kernel Device Tree Binaries

~/
sudo mkdir -p /media/rootfs/boot/dtbs/${kernel_version}/
sudo tar xfv ./armv7-lpae-multiplatform/deploy/${kernel_version}-dtbs.tar.gz -C /media/rootfs/boot/dtbs/${kernel_version}/

Copy Kernel Modules

~/
sudo tar xfv ./armv7-lpae-multiplatform/deploy/${kernel_version}-modules.tar.gz -C /media/rootfs/

File Systems Table (/etc/fstab)

/etc/fstab
sudo sh -c "echo '/dev/mmcblk0p1  /  auto  errors=remount-ro  0  1' >> /media/rootfs/etc/fstab"

Remove microSD/SD card

sync
sudo umount /media/rootfs

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