# ATSAMA5D27-SOM1-EK1 Getting Started

**URL:** <https://forum.digikey.com/t/atsama5d27-som1-ek1-getting-started/1113>\
**Category:** Linux Discussions\
**Created:** [January 18, 2018, 7:45pm UTC](https://forum.digikey.com/t/atsama5d27-som1-ek1-getting-started/1113 "2018-01-18T19:45:55Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![RobertCNelson](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/robertcnelson/32/12_2.png) [@RobertCNelson](https://forum.digikey.com/u/RobertCNelson)\
**Post date:** [January 18, 2018, 7:45pm UTC](https://forum.digikey.com/t/atsama5d27-som1-ek1-getting-started/1113/1 "2018-01-18T19:45:55Z")

</div>

This is a page about Microchip’s Cortex-A5 SMART SAMA5D27-SOM1 based evaluation platform (ATSAMA5D27-SOM1-EK1).

# Availability

Boards:

- [ATSAMA5D27-SOM1-EK1-ND](https://www.digikey.com/product-search/en?keywords=ATSAMA5D27-SOM1-EK1-ND) at DigiKey

# Basic Requirements

- Running a recent release of Debian, Fedora or Ubuntu; without OS Virtualization Software.
- ARM Cross Compiler – Linaro: [https://www.linaro.org](https://www.linaro.org)
  - Linaro Toolchain Binaries: [https://www.linaro.org/downloads/](https://www.linaro.org/downloads/)

- Bootloader
  - Das U-Boot – the Universal Boot Loader: [http://www.denx.de/wiki/U-Boot](http://www.denx.de/wiki/U-Boot)
  - Source: [https://github.com/u-boot/u-boot/](https://github.com/u-boot/u-boot/)

- Linux Kernel
  - Linus’s Mainline tree: [https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git](https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git)

- ARM based rootfs
  - Debian: [https://www.debian.org](https://www.debian.org)
  - Ubuntu: [https://www.ubuntu.com](https://www.ubuntu.com)

# 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:

```bash
#~/
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:

```bash
#~/
${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](http://www.at91.com/linux4sam/bin/view/Linux4SAM/AT91Bootstrap)  
Source: [https://github.com/linux4sam/at91bootstrap](https://github.com/linux4sam/at91bootstrap)  
Download:

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

```

Configure and Build:

```bash
#~/at91bootstrap
make ARCH=arm CROSS_COMPILE=${CC} distclean
make ARCH=arm CROSS_COMPILE=${CC} sama5d27_som1_eksd_uboot_defconfig
make ARCH=arm CROSS_COMPILE=${CC}

```

# Bootloader: U-Boot

Das U-Boot – the Universal Boot Loader: [http://www.denx.de/wiki/U-Boot](http://www.denx.de/wiki/U-Boot)  
[eewiki.net](http://eewiki.net) patch archive: [https://github.com/eewiki/u-boot-patches](https://github.com/eewiki/u-boot-patches)  
Download:

```bash
#~/
git clone https://github.com/u-boot/u-boot
cd u-boot/
git checkout v2019.01-rc3 -b tmp

```

Patches:

```bash
#~/u-boot
wget -c https://github.com/eewiki/u-boot-patches/raw/master/v2019.01-rc3/0001-ARM-at91-Convert-SPL_GENERATE_ATMEL_PMECC_HEADER-to-.patch
wget -c https://github.com/eewiki/u-boot-patches/raw/master/v2019.01-rc3/0001-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:

```bash
#~/u-boot
make ARCH=arm CROSS_COMPILE=${CC} distclean
make ARCH=arm CROSS_COMPILE=${CC} sama5d27_som1_ek_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:

```bash
#~/
git clone https://github.com/RobertCNelson/armv7_devel
cd armv7_devel/

```

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

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

```

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

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

```

Build:

```bash
#~/armv7_devel/
./build_kernel.sh

```

# Root File System

## Debian 9

| User | Password |
| --- | --- |
| debian | temppwd |
| root | root |

Download:

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

```

Verify:

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

```

Extract:

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

```

## Ubuntu 18.04 LTS

| User | Password |
| --- | --- |
| ubuntu | temppwd |

Download:

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

```

Verify:

```bash
#~/
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:

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

```

# Setup microSD card

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

```bash
export DISK=/dev/mmcblk0

```

Erase partition table/labels on microSD card:

```bash
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.**

```bash
sudo sfdisk --version
sfdisk from util-linux 2.27.1

```

```bash
#sfdisk >= 2.26.x
sudo sfdisk ${DISK} <<- __EOF__
1M,48M,0xE,*
49M,,,-
__EOF__

```

```bash
#sfdisk <= 2.25.x
sudo sfdisk --unit M ${DISK} <<- __EOF__
1,48,0xE,*
49,,,-
__EOF__

```

Format Partition:

```auto
for: DISK=/dev/mmcblk0
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…**

```bash
sudo mkdir -p /media/boot/
sudo mkdir -p /media/rootfs/
 
for: DISK=/dev/mmcblk0
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/

```

```bash
#~/

```

# 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.

```bash
-----------------------------
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.

```bash
export kernel_version=4.X.Y-Z

```

## Copy Root File System

```bash
#~/
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:

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

```

## Copy Kernel Device Tree Binaries

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

```

## Copy Kernel Modules

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

```

## File Systems Table (/etc/fstab)

```bash
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

```bash
sync
sudo umount /media/boot
sudo umount /media/rootfs

```

---

<div class="post-metadata">

**Author:** ![RobertCNelson](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/robertcnelson/32/12_2.png) [@RobertCNelson](https://forum.digikey.com/u/RobertCNelson)\
**Post date:** [January 4, 2019, 2:51pm UTC](https://forum.digikey.com/t/atsama5d27-som1-ek1-getting-started/1113/2 "2019-01-04T14:51:09Z")

</div>

Split this topic on January 4, 2019, 2:51pm UTC

A post was split to a new topic: [ATSAMA5D27-SOM1-EK1 Getting Started - OS Virtualization](https://forum.digikey.com/t/atsama5d27-som1-ek1-getting-started-os-virtualization/2505)