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This is a page about Microchip's Cortex-A5 SMART SAMA5D4 Xplained Ultra evaluation kit (ATSAMA5D4-XULT).

Availability

Boards:
ATSAMA5D4-XULT-ND at Digi-Key

(USB to serial adapter) TTL-232R-3V3 at Digi-Key

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/6.4-2018.05/arm-linux-gnueabihf/gcc-linaro-6.4.1-2018.05-x86_64_arm-linux-gnueabihf.tar.xz
tar xf gcc-linaro-6.4.1-2018.05-x86_64_arm-linux-gnueabihf.tar.xz
export CC=`pwd`/gcc-linaro-6.4.1-2018.05-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf-

Test Cross Compiler:

~/
${CC}gcc --version
arm-linux-gnueabihf-gcc (Linaro GCC 6.4-2018.05) 6.4.1 20180425 [linaro-6.4-2018.05 revision 7b15d0869c096fe39603ad63dc19ab7cf035eb70]
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.

Bootloader: AT91Bootstrap

AT91Bootstrap – Microchip's first step bootloader: http://www.at91.com/linux4sam/bin/view/Linux4SAM/AT91Bootstrap
Source: https://github.com/linux4sam/at91bootstrap
Download:

~/
git clone https://github.com/linux4sam/at91bootstrap
cd at91bootstrap/
git checkout v3.8.10 -b tmp

Configure and Build:

~/at91bootstrap
make ARCH=arm CROSS_COMPILE=${CC} distclean
make ARCH=arm CROSS_COMPILE=${CC} sama5d4_xplainedsd_uboot_secure_defconfig
make ARCH=arm CROSS_COMPILE=${CC}

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:

~/
git clone https://github.com/u-boot/u-boot
cd u-boot/
git checkout v2019.01 -b tmp

Patches:

~/u-boot
wget -c https://github.com/eewiki/u-boot-patches/raw/master/v2019.01/0001-ARM-at91-Convert-SPL_GENERATE_ATMEL_PMECC_HEADER-to-.patch
wget -c https://github.com/eewiki/u-boot-patches/raw/master/v2019.01/0001-sama5dX-fixes.patch
 
patch -p1 < 0001-ARM-at91-Convert-SPL_GENERATE_ATMEL_PMECC_HEADER-to-.patch
patch -p1 < 0001-sama5dX-fixes.patch

Configure and Build:

~/u-boot
make ARCH=arm CROSS_COMPILE=${CC} distclean
make ARCH=arm CROSS_COMPILE=${CC} sama5d4_xplained_mmc_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_devel
cd armv7_devel/

For v4.9.x-sama5-armv7 (Longterm 4.9.x):

~/armv7_devel/
git checkout origin/v4.9.x-sama5-armv7 -b tmp

For v4.14.x-sama5-armv7 (Longterm 4.14.x):

~/armv7_devel/
git checkout origin/v4.14.x-sama5-armv7 -b tmp

For v4.19.x-sama5-armv7 (Longterm 4.19.x):

~/armv7_devel/
git checkout origin/v4.19.x-sama5-armv7 -b tmp

Build:

~/armv7_devel/
./build_kernel.sh

Root File System

Debian 9

User

Password

debian

temppwd

root

root

Download:

~/
wget -c https://rcn-ee.com/rootfs/eewiki/minfs/debian-9.6-minimal-armhf-2018-11-26.tar.xz

Verify:

~/
sha256sum debian-9.6-minimal-armhf-2018-11-26.tar.xz
c9d9b2623131829eeeefa153274219d89887a1984b8dde72cfbfe29f29c7a10d  debian-9.6-minimal-armhf-2018-11-26.tar.xz

Extract:

~/
tar xf debian-9.6-minimal-armhf-2018-11-26.tar.xz

Ubuntu 18.04 LTS

User

Password

ubuntu

temppwd

Download:

~/
wget -c https://rcn-ee.com/rootfs/eewiki/minfs/ubuntu-18.04.1-minimal-armhf-2018-11-26.tar.xz

Verify:

~/
sha256sum ubuntu-18.04.1-minimal-armhf-2018-11-26.tar.xz
d8190bc858bab9db83bec03707b2636dc23646fca2a0420fb49adbedf7d492c5  ubuntu-18.04.1-minimal-armhf-2018-11-26.tar.xz

Extract:

~/
tar xf ubuntu-18.04.1-minimal-armhf-2018-11-26.tar.xz

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.

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
Thus you would use:
export DISK=/dev/sdb
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
Thus you would use:
export DISK=/dev/mmcblk0

Erase partition table/labels on microSD card:

sudo dd if=/dev/zero of=${DISK} bs=1M count=50

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

sudo sfdisk --version
sfdisk from util-linux 2.27.1
sfdisk >= 2.26.x
sudo sfdisk ${DISK} <<-__EOF__
1M,48M,0xE,*
49M,,,-
__EOF__
sfdisk <= 2.25.x
sudo sfdisk --unit M ${DISK} <<-__EOF__
1,48,0xE,*
49,,,-
__EOF__

Format Partition:

for: DISK=/dev/mmcblkX
sudo mkfs.vfat -F 16 -n BOOT ${DISK}p1
sudo mkfs.ext4 -L rootfs ${DISK}p2
 
for: DISK=/dev/sdX
sudo mkfs.vfat -F 16 -n BOOT ${DISK}1
sudo mkfs.ext4 -L rootfs ${DISK}2

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

sudo mkdir -p /media/boot/
sudo mkdir -p /media/rootfs/
 
for: DISK=/dev/mmcblkX
sudo mount ${DISK}p1 /media/boot/
sudo mount ${DISK}p2 /media/rootfs/
 
for: DISK=/dev/sdX
sudo mount ${DISK}1 /media/boot/
sudo mount ${DISK}2 /media/rootfs/

Install Bootloader

Copy at91bootstrap/u-boot binaries to the boot partition

~/
sudo cp -v ./at91bootstrap/binaries/sama5d4_xplained-sdcardboot-uboot-3.8.10.bin /media/boot/BOOT.BIN
sudo cp -v ./u-boot/u-boot.bin /media/boot/

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.

export kernel_version=4.X.Y-Z

Copy Root File System

~/
sudo tar xfvp ./*-*-*-armhf-*/armhf-rootfs-*.tar -C /media/rootfs/
sync
sudo chown root:root /media/rootfs/
sudo chmod 755 /media/rootfs/

Copy Kernel Image

Kernel Image:

~/
sudo cp -v ./armv7_devel/deploy/${kernel_version}.zImage /media/boot/zImage

Copy Kernel Device Tree Binaries

~/
sudo mkdir -p /media/boot/dtbs/
sudo tar xfvo ./armv7_devel/deploy/${kernel_version}-dtbs.tar.gz -C /media/boot/dtbs/

Copy Kernel Modules

~/
sudo tar xfv ./armv7_devel/deploy/${kernel_version}-modules.tar.gz -C /media/rootfs/

File Systems Table (/etc/fstab)

sudo sh -c "echo '/dev/mmcblk0p2  /  auto  errors=remount-ro  0  1' >> /media/rootfs/etc/fstab"
sudo sh -c "echo '/dev/mmcblk0p1  /boot/uboot  auto  defaults  0  2' >> /media/rootfs/etc/fstab"

Remove microSD/SD card

sync
sudo umount /media/boot
sudo umount /media/rootfs

Comments

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