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This is a page about Atmel's SAM9x5 family of Development Boards.

Availability

Boards:
SAM9G15-EK at Digi-Key
SAM9G25-EK at Digi-Key
SAM9G35-EK at Digi-Key
SAM9X25-EK at Digi-Key
SAM9X35-EK at Digi-Key

Comparison

From: http://www.atmel.com/tools/SAM9X25-EK.aspx?tab=documents -> "SAM9G15-EK, SAM9G25-EK, SAM9G35-EK, SAM9X25-EK, SAM9X35-EK User Guide" Table 4-1

Peripheral

SO-DIMM Interface

Connector

SAM9G15

SAM9G25

SAM9G35

SAM9X25

SAM9X35

LAN

MII/RMII 10/100 with PHY

ETH0

 

X

X

X

X

LAN

RMII 10/100 with PHY

ETH1

 

 

 

X

 

USART/UART

RS232 4 wires/RS485 Shared

COM0

X

X

X

X

X

USART/UART

RS232 4 wires

COM3

 

X

 

X

 

USART/UART

RS232 2 wires

DBGU

X

X

X

X

X

CAN

CAN

CAN0

 

 

 

X

X

CAN

CAN

CAN1

 

 

 

X

X

USB

2 * USB 2.0 Host

 

X

X

X

X

X

USB

1 * USB 2.0 Host/Device

 

X

X

X

X

X

SMD

Software Modem Device

 

X

X

X

X

X

Memory Card Support

uSD Card Slot Onboard

HSMCI0

X

X

X

X

X

Memory Card Support

MMC/MMC+/SD/SDIO/CE-ATA

HSMCI1

X

X

X

X

X

ISI

 

 

 

X

 

 

 

LCD/Touch Screen

24-bit Output Mode

 

X

 

X

 

X

ZigBee

 

 

X

X

X

X

X

SPI

 

 

X

X

X

X

X

TWI

 

 

X

X

X

X

X

DEBUG

JTAG Test Access Point

 

X

X

X

X

X

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

Test Cross Compiler:

~/
${CC}gcc --version
arm-eabi-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 f05a4df -b tmp

Configure and Build:

~/at91bootstrap
make ARCH=arm CROSS_COMPILE=${CC} distclean
make ARCH=arm CROSS_COMPILE=${CC} at91sam9x5eksd_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
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 v2018.07 -b tmp

Patches:

~/u-boot
wget -c https://rcn-ee.com/repos/git/u-boot-patches/v2018.07/0001-at91sam9x5ek-uEnv.txt-bootz-n-fixes.patch
 
patch -p1 < 0001-at91sam9x5ek-uEnv.txt-bootz-n-fixes.patch

Configure and Build:

~/u-boot
make ARCH=arm CROSS_COMPILE=${CC} distclean
make ARCH=arm CROSS_COMPILE=${CC} at91sam9x5ek_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/armv5_devel
cd armv5_devel/

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

~/armv5_devel/
git checkout origin/v4.9.x -b tmp

For v4.14.x (Longterm 4.14.x):

~/armv5_devel/
git checkout origin/v4.14.x -b tmp

Build:

~/armv5_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-9.5-minimal-armel-2018-07-30.tar.xz

Verify:

~/
sha256sum debian-9.5-minimal-armel-2018-07-30.tar.xz
88ca6a738a7485c4c49185b01d2bd4af0a3d2a443ec8b74f77281018d3315fc2  debian-9.5-minimal-armel-2018-07-30.tar.xz

Extract:

~/
tar xf debian-9.5-minimal-armel-2018-07-30.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=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/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...

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/

Install Bootloader

Copy at91bootstrap/u-boot binaries to the boot partition

~/
sudo cp -v ./at91bootstrap/binaries/at91sam9x5ek-sdcardboot-uboot-3.8.9.bin /media/boot/BOOT.BIN
sudo cp -v ./u-boot/u-boot.bin /media/boot/

uEnv.txt based bootscript

Create "uEnv.txt" boot script: (nano uEnv.txt)
Make sure to un-comment which board you have with the fdtfile variable otherwise /dtbs/at91sam9g25ek.dtb will be used by default.

~/uEnv.txt
#ariag25 board
#fdtfile=/dtbs/at91-ariag25.dtb
 
#SAM9G15-EK
#fdtfile=/dtbs/at91sam9g15ek.dtb
 
#SAM9G25-EK
#fdtfile=/dtbs/at91sam9g25ek.dtb
 
#SAM9G35-EK
#fdtfile=/dtbs/at91sam9g35ek.dtb
 
#SAM9X25-EK
#fdtfile=/dtbs/at91sam9x25ek.dtb
 
#SAM9X35-EK
#fdtfile=/dtbs/at91sam9x35ek.dtb
 
#Default u-boot settings:
#console=ttyS0,115200
#optargs=console=tty0
 
#mmcroot=/dev/mmcblk0p2 ro
#mmcrootfstype=ext4 rootwait fixrtc
 
#Run custom u-boot commands early:
#uenvcmd=

Copy uEnv.txt to the boot partition:

~/
sudo cp -v ./uEnv.txt /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 ./debian-*-*-armel-*/armel-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 ./armv5_devel/deploy/${kernel_version}.zImage /media/boot/zImage

Copy Kernel Device Tree Binaries

~/
sudo mkdir -p /media/boot/dtbs/
sudo tar xfvo ./armv5_devel/deploy/${kernel_version}-dtbs.tar.gz -C /media/boot/dtbs/

Copy Kernel Modules

~/
sudo tar xfv ./armv5_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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