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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 v3.8.10 -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://github.com/eewiki/u-boot-patches/raw/master/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

For v4.19.x (Longterm 4.19.x):

~/armv5_devel/
git checkout origin/v4.19.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-9.6-minimal-armel-2018-11-26.tar.xz

Verify:

~/
sha256sum debian-9.6-minimal-armel-2018-11-26.tar.xz
7f93f169764664d60588c904e23acb5ac81b9e14f8023bb5bb2c548f9b33fe39  debian-9.6-minimal-armel-2018-11-26.tar.xz

Extract:

~/
tar xf debian-9.6-minimal-armel-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/at91sam9x5ek-sdcardboot-uboot-3.8.10.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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