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

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Table of Contents
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styledisc

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 GCC that runs on generic linux, sorry (32bit) x86 users, it's time to upgrade...
Download/Extract:

Code Block
titleuser@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-

Test Cross Compiler:

Code Block
titleuser@localhost:~$
${CC}gcc --version
Code Block
titleTest 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.

Bootloader: AT91Bootstrap

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

Code Block
titleuser@localhost:~$
git clone https://github.com/linux4sam/at91bootstrap
cd at91bootstrap/
git checkout v3.8.10 -b tmp

Configure and Build:

Code Block
titleuser@localhost:~/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:

Code Block
titleuser@localhost:~$
git clone https://github.com/u-boot/u-boot
cd u-boot/
git checkout v2019.01 -b tmp

Patches:

Code Block
titleuser@localhost:~/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:

Code Block
titleuser@localhost:~/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:

Code Block
titleuser@localhost:~$
git clone https://github.com/RobertCNelson/armv7_devel
cd armv7_devel/

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

Code Block
titleuser@localhost:~/armv7_devel$
git checkout origin/v4.14.x-sama5-armv7 -b tmp

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

Code Block
titleuser@localhost:~/armv7_devel$
git checkout origin/v4.19.x-sama5-armv7 -b tmp

Build:

Code Block
titleuser@localhost:~/armv7_devel$
./build_kernel.sh

Root File System

Debian 10

User

Password

debian

temppwd

root

root

Download:

Code Block
titleuser@localhost:~$
wget -c https://rcn-ee.com/rootfs/eewiki/minfs/debian-10.3-minimal-armhf-2020-02-10.tar.xz

Verify:

Code Block
titleuser@localhost:~$
sha256sum debian-10.3-minimal-armhf-2020-02-10.tar.xz
Code Block
titlesha256sum output:
a6645dfb49795bbe809dfc3c2b7dff53ad4daab24a654edd29bab29ae007cc40  debian-10.3-minimal-armhf-2020-02-10.tar.xz

Extract:

Code Block
titleuser@localhost:~$
tar xf debian-10.3-minimal-armhf-2020-02-10.tar.xz

Ubuntu 18.04 LTS

User

Password

ubuntu

temppwd

Download:

Code Block
titleuser@localhost:~$
wget -c https://rcn-ee.com/rootfs/eewiki/minfs/ubuntu-18.04.3-minimal-armhf-2020-02-10.tar.xz

Verify:

Code Block
titleuser@localhost:~$
sha256sum ubuntu-18.04.3-minimal-armhf-2020-02-10.tar.xz
Code Block
titlesha256sum output:
b28b356d75153bfb3beb5c96bf8eabe92025cf5e665e1a564b469bc70e5a363b  ubuntu-18.04.3-minimal-armhf-2020-02-10.tar.xz

Extract:

Code Block
titleuser@localhost:~$
tar xf ubuntu-18.04.3-minimal-armhf-2020-02-10.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.

Code Block
titleExample: 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 Block
titleThus you would use:
export DISK=/dev/sdb
Code Block
titleExample: 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 Block
titleThus you would use:
export DISK=/dev/mmcblk0

Erase partition table/labels on microSD card:

Code Block
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.

Code Block
titleCheck the version of sfdisk installed on your pc
sudo sfdisk --version
Code Block
titleExample Output
sfdisk from util-linux 2.27.1
Code Block
titlesfdisk >= 2.26.x
sudo sfdisk ${DISK} <<-__EOF__
1M,48M,0xE,*
49M,,,-
__EOF__
Code Block
titlesfdisk <= 2.25.x
sudo sfdisk --unit M ${DISK} <<-__EOF__
1,48,0xE,*
49,,,-
__EOF__

Format Partition:

Code Block
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 be auto-mounted...

Code Block
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

Code Block
title~/
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.

Code Block
-----------------------------
Script Complete
eewiki.net: [user@localhost:~$ export kernel_version=5.X.Y-Z]
-----------------------------

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 Block
export kernel_version=5.X.Y-Z

Copy Root File System

Code Block
titleuser@localhost:~$
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:

Code Block
titleuser@localhost:~$
sudo cp -v ./armv7_devel/deploy/${kernel_version}.zImage /media/boot/zImage

Copy Kernel Device Tree Binaries

Code Block
titleuser@localhost:~$
sudo mkdir -p /media/boot/dtbs/
sudo tar xfvo ./armv7_devel/deploy/${kernel_version}-dtbs.tar.gz -C /media/boot/dtbs/

Copy Kernel Modules

Code Block
titleuser@localhost:~$
sudo tar xfv ./armv7_devel/deploy/${kernel_version}-modules.tar.gz -C /media/rootfs/

File Systems Table (/etc/fstab)

Code Block
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

Code Block
sync
sudo umount /media/boot
sudo umount /media/rootfs

Comments

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