SAMA5D27 SOM1 Evaluation Kit

---

SoC Features

The SAMA5D2 series is a high-performance, ultra-low-power ARM Cortex-A5 processor based MPU. The Cortex A5 processor runs up to 500MHz and features the ARM NEON SIMD engine a 128kB L2 cache and a floating point unit. It supports multiple memories, including latest-generation technologies such as DDR3, LPDDR3, and QSPI Flash. It integrates powerful peripherals for connectivity (EMAC, USB, dual CAN, up to 10 UARTs, etc.) and user interface applications (TFT LCD controller, embedded capacitive touch controller, class D amplifier, audio PLL, CMOS sensor interface, etc.). The devices offer advanced security functions to protect customer code and secure external data transfers. These include ARM TrustZone, tamper detection, secure data storage, hardware encryption engines including private keys, on-the-fly decryption of code stored in external DDR or QSPI memory and a secure boot loader.

Kit Information

Kit Overview

Access the console

The usual serial communication parameters are 115200 8-N-1 :

Baud rate 115200 Data 8 bits Parity None Stop 1 bit Flow control None

Access the console on JLINK micro-A USB connector (J10)

The serial console can be accessed from the micro-A USB connector that gives access to the on-board serial-to-USB converter (marked as J10 JLINK). In fact, the ATSAM3U chip on the Evaluation Kit acts as a serial-to-USB converter and is loaded with a firmware that is able to talk USB-CDC protocol.

• For Microsoft Windows users: Install the J-Link CDC USB driver. No need to install a driver on any regular Linux distribution.
• Connect the USB cable to the board (J10 JLINK)
  • For Microsoft Windows users: identify the USB connection that is established
    JLINK CDC UART Port should appear in Device Manager. The COMxx number will be used to configure the terminal emulator.
    
     
  • For Linux users: identify the USB connection by monitoring the last lines of dmesg command. The /dev/ttyACMx number will be used to configure the terminal emulator:

    usb 1-1.2.2.4: new high-speed USB device number 33 using ehci-pci
    usb 1-1.2.2.4: config 1 interface 1 altsetting 0 bulk endpoint 0x83 has invalid maxpacket 64
    usb 1-1.2.2.4: config 1 interface 1 altsetting 0 bulk endpoint 0x4 has invalid maxpacket 64
    usb 1-1.2.2.4: New USB device found, idVendor=1366, idProduct=0105
    usb 1-1.2.2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
    usb 1-1.2.2.4: Product: J-Link
    usb 1-1.2.2.4: Manufacturer: SEGGER
    usb 1-1.2.2.4: SerialNumber: 000483029109
    cdc_acm 1-1.2.2.4:1.0: ttyACM0: USB ACM device
    

• Now open your favorite terminal emulator with appropriate settings

Demo

Demo archives

Media type Board Features Binary Description Yocto Project / Poky based demo SD Card image SAMA5D27 SOM1 EK Headless linux4sam-poky-sama5d27_som1_ek-headless-2024.04.img.bz2 (~ 111 MB) md5: 625517f877369df8153e33573be86ad6 Linux4SAM Yocto Project / Poky based demo compiled from tag linux4sam-2024.04 Follow procedure: #Create_a_SD_card_with_the_demo OP-TEE Headless linux4sam-poky-sama5d27_som1_ek-optee-headless-2024.04.img.bz2 (~ 115 MB) md5: 11d7bca48e33086dcfc11e27b442c736 Graphics linux4sam-poky-sama5d27_som1_ek-graphics-2024.04.img.bz2 (~ 192 MB) md5: 4aabd9a0721b4814662acf2f0820feee OP-TEE Graphics linux4sam-poky-sama5d27_som1_ek-optee-graphics-2024.04.img.bz2 (~ 196 MB) md5: e90adad557461e764662017524533620 BuildRoot based demo SD Card image SAMA5D27 SOM1 EK Headless linux4sam-buildroot-sama5d27_som1_ek-headless-2024.04.img.bz2 (~ 81 MB) md5: 93c5ed36f220d9b9a3e1a7b103b4a558 Linux4SAM BuildRoot based demo compiled from tag linux4sam-2024.04 Follow procedure: #Create_a_SD_card_with_the_demo OP-TEE Headless linux4sam-buildroot-sama5d27_som1_ek-optee-headless-2024.04.img.bz2 (~ 82 MB) md5: 325ee692ccb95ca8d140ea755b27ac28 Graphics linux4sam-buildroot-sama5d27_som1_ek-graphics-2024.04.img.bz2 (~ 204 MB) md5: 9adf2f848ce4363b823971ec35d351ed OP-TEE Graphics linux4sam-buildroot-sama5d27_som1_ek-optee-headless-2024.04.img.bz2 (~ 82 MB) md5: 325ee692ccb95ca8d140ea755b27ac28

Create a SD card with the demo

You need a 1 GB SD card (or more) and to download the image of the demo. The image is compressed to reduce the amount of data to download. This image contains:

• a FAT32 partition with the AT91Bootstrap, U-Boot and the Linux Kernel (zImage and dtb).
• an EXT4 partition for the rootfs.

Multi-platform procedure

To write the compressed image on the SD card, you will have to download and install balenaEtcher. This tool, which is an Open Source software, is useful since it allows to get a compressed image as input. More information and extra help available on the balenaEtcher website.

• Insert your SD card and launch Etcher:

1. Select the demo image. They are marked as "SD Card image" in the demo table above.
   Note that you can select a compressed image (like the demos available here). The tool is able to decompress files on the fly
2. Select the device corresponding to your SD card (Etcher proposes you the devices that are removable to avoid erasing your system disk)
3. Click on the Flash! button
4. On Linux, Etcher finally asks you to enter your root password because it needs access to the hardware (your SD card reader or USB to SD card converter)
5. then the flashing process begins followed by a verification phase (optional)

• Once writing done, Etcher asks you if you want to burn another demo image:

• Your SD card is ready!

Build From source code

Setup ARM Cross Compiler

• First step is to dowload the ARM GNU Toolchain:
  

  wget -c https://developer.arm.com/-/media/Files/downloads/gnu/13.2.rel1/binrel/arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-linux-gnueabihf.tar.xz
     

• Next step is to add the ARM GNU Toolchain into your system:
  

  tar -xf arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-linux-gnueabihf.tar.xz
  export CROSS_COMPILE=`pwd`/arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-linux-gnueabihf/bin/arm-none-linux-gnueabihf-
      

  or

  tar -xf arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-linux-gnueabihf.tar.xz
  export CROSS_COMPILE=arm-none-linux-gnueabihf-
  export PATH=$PATH:/YOUR/PATH/TO/arm-gnu-toolchain-13.2.Rel1-x86_64-arm-none-linux-gnueabihf/bin/
     

• !Note: If you already have an old ARM GNU Toolchain need to clean up the PATH with:
  

  export PATH=${PATH/':/YOUR/PATH/TO/arm-gnu-toolchain-VERSION-x86_64-arm-none-linux-gnueabihf/bin/'/}
      

Build AT91Bootstrap from sources

This section describes how to get source code from the git repository, how to configure with the default configuration, how to customize AT91Bootstrap based on the default configuration and finally to build AT91Bootstrap to produce the binary. take the default configuration to download U-Boot from NandFlash for example.

Get AT91Bootstrap Source Code

You can easily download AT91Bootstrap source code on the at91bootstrap git repository.

To get the source code, you should clone the repository by doing:

$ git clone https://github.com/linux4sam/at91bootstrap.git
Cloning into 'at91bootstrap'...
remote: Enumerating objects: 17621, done.
remote: Counting objects: 100% (3324/3324), done.
remote: Compressing objects: 100% (1029/1029), done.
remote: Total 17621 (delta 2465), reused 3102 (delta 2285), pack-reused 14297
Receiving objects: 100% (17621/17621), 5.65 MiB | 4.65 MiB/s, done.
Resolving deltas: 100% (13459/13459), done.
$ cd at91bootstrap/

Configure AT91Bootstrap

Assuming you are at the AT91Bootstrap root directory, you will find a configs folder which contains several default configuration files:

sama5d27_som1_ekqspi_uboot_defconfig
sama5d27_som1_eksd_uboot_defconfig

Tips: qspi means to read quad-SPI serial flash, sd means to read mmc card.

You can configure AT91Bootstrap to load U-Boot binary from SD Card by doing:

$ make mrproper
$ make sama5d27_som1_eksd_uboot_defconfig

If the configuring process is successful, the .config file can be found at AT91Bootstrap root directory.

Customize AT91Bootstrap

If the default configuration doesn't meet your need, after configuring with the default configuration, you can customize it by doing:

$ make menuconfig

Now, in the menuconfig dialog, you can easily add or remove some features to/from AT91Bootstrap as the same way as kernel configuration.
Move to <Exit> with arrows and press this button hitting the Enter key to exit from this screen.

Build AT91Bootstrap

Then you can build the AT91Bootstrap binary by doing:

$ make

If the building process is successful, the final .bin image is build/binaries/at91bootstrap.bin.

Build U-Boot from sources

Getting U-Boot sources

Dedicated page on U-Boot wiki: http://www.denx.de/wiki/U-Boot/SourceCode

You can easily download U-Boot source code from Linux4Microchip GitHub U-Boot repository:

• clone the Linux4microchip GitHub U-Boot repository

     $ git clone https://github.com/linux4microchip/u-boot-mchp.git
   Cloning into 'u-boot-mchp'...
   remote: Enumerating objects: 951876, done.
   remote: Counting objects: 100% (17718/17718), done.
   remote: Compressing objects: 100% (5735/5735), done.
   remote: Total 951876 (delta 12391), reused 15314 (delta 11846), pack-reused 934158
   Receiving objects: 100% (951876/951876), 164.77 MiB | 401.00 KiB/s, done.
   Resolving deltas: 100% (790362/790362), done.
     $ cd u-boot-mchp/
     

• The source code has been taken from the master branch which is pointing to the latest branch we use. If you want to use the other branch, you can list them and use one of them by doing:

     $ git branch -r
    origin/HEAD -> origin/master
    origin/dev/tony/sama7g5ek_optee
    origin/master
    origin/sam9x60_curiosity_early
    origin/sam9x60_early
    origin/sam9x60_iar
    origin/sam9x7_early
    origin/sama5d27wlsom1ek_ear
    origin/sama7g5_early
    origin/u-boot-2012.10-at91
    origin/u-boot-2013.07-at91
    origin/u-boot-2014.07-at91
    origin/u-boot-2015.01-at91
    origin/u-boot-2016.01-at91
    origin/u-boot-2016.03-at91
    origin/u-boot-2017.03-at91
    origin/u-boot-2018.07-at91
    origin/u-boot-2019.04-at91
    origin/u-boot-2020.01-at91
    origin/u-boot-2021.04-at91
    origin/u-boot-2022.01-at91
    origin/u-boot-2023.07-mchp
    origin/uboot_5series_1.x
  
     $ git checkout origin/u-boot-2023.07-mchp -b u-boot-2023.07-mchp
    Branch 'u-boot-2023.07-mchp' set up to track remote branch 'u-boot-2023.07-mchp' from 'origin'.
    Switched to a new branch 'u-boot-2023.07-mchp'
     

Cross-compiling U-Boot

Before compiling the U-Boot, you need setup cross compile toolchain in the section.

Latest versions of U-boot (2018.07 and newer) have a minimum requirement of 6.0 version of the GCC toolchain. We always recommend to use the latest versions.

Once the AT91 U-Boot sources available, cross-compile U-Boot is made in two steps: configuration and compiling. Check the Configuration chapter in U-Boot reference manual.

Go to the configs/ to find the exact target when invoking make.

The U-Boot environment variables can be stored in different media, above config files can specify where to store the U-Boot environment.

   # To put environment variables in quad-SPI serial flash:
   sama5d27_som1_ek_qspiflash_defconfig
   # To put environment variables in SD/MMC card:
   sama5d27_som1_ek_mmc_defconfig

Here are the building steps for the SAMA5D27-SOM1-EK board:

# You can change the config according to your needs.
make sama5d27_som1_ek_mmc_defconfig
make

The result of these operations is a fresh U-Boot binary called u-boot.bin corresponding to the binary ELF file u-boot.

• u-boot.bin is the file you should store on the board
• u-boot is the ELF format binary file you may use to debug U-Boot through a JTag link for instance.

Build Kernel from sources

Required packages

You must install essential host packages on your build host. These requirements are listed in the Linux kernel documentation with the chapter Install build requirements. You must follow this process which includes, but not limited to, the following packages:

• build-essential
  
• flex
  
• bison
  
• git
  
• perl-base
  
• libssl-dev
  
• libncurses5-dev
  
• libncursesw5-dev
  
• ncurses-dev
  

Getting Kernel sources

To get the source code, you have to clone the repository:

$ git clone https://github.com/linux4microchip/linux.git
Cloning into 'linux'...
remote: Enumerating objects: 8587836, done.
remote: Total 8587836 (delta 0), reused 0 (delta 0), pack-reused 8587836
Receiving objects: 100% (8587836/8587836), 3.49 GiB | 13.44 MiB/s, done.
Resolving deltas: 100% (7117887/7117887), done.
Updating files: 100% (70687/70687), done.
$ cd linux

The source code has been taken from the master branch which is pointing on the latest branch we use.

Note that you can also add this Linux4SAM repository as a remote GIT repository to your usual Linux git tree. It will save you a lot of bandwidth and download time:

$ git remote add linux4microchip https://github.com/linux4microchip/linux.git
$ git remote update linux4microchip
Fetching linux4microchip
From https://github.com/linux4microchip/linux
 * [new branch]                linux-6.1-mchp -> linux4microchip/linux-6.1-mchp
 * [new branch]                linux-6.6-mchp -> linux4microchip/linux-6.6-mchp
 * [new branch]                master     -> linux4microchip/master

If you want to use another branch, you can list them and use one of them by doing this:

$ git branch -r
  linux4microchip/linux-5.10-mchp
  linux4microchip/linux-5.15-mchp
  linux4microchip/linux-5.15-mchp+fpga
  linux4microchip/linux-6.1-mchp
  linux4microchip/linux-6.1-mchp+fpga
  linux4microchip/linux-6.6-mchp
  linux4microchip/linux-6.6-mchp+fpga
  linux4microchip/master
$ git checkout -b linux-6.6-mchp --track remotes/linux4microchip/linux-6.6-mchp
Branch linux-6.6-mchp set up to track remote branch linux-6.6-mchp from linux4microchip.
Switched to a new branch 'linux-6.6-mchp'

Setup ARM Cross Compiler

• First step is to dowload the ARM GNU Toolchain:
  

  wget -c https://developer.arm.com/-/media/Files/downloads/gnu/13.2.rel1/binrel/arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-linux-gnueabihf.tar.xz
     

• Next step is to add the ARM GNU Toolchain into your system:
  

  tar -xf arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-linux-gnueabihf.tar.xz
  export CROSS_COMPILE=`pwd`/arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-linux-gnueabihf/bin/arm-none-linux-gnueabihf-
      

  or

  tar -xf arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-linux-gnueabihf.tar.xz
  export CROSS_COMPILE=arm-none-linux-gnueabihf-
  export PATH=$PATH:/YOUR/PATH/TO/arm-gnu-toolchain-13.2.Rel1-x86_64-arm-none-linux-gnueabihf/bin/
     

• !Note: If you already have an old ARM GNU Toolchain need to clean up the PATH with:
  

  export PATH=${PATH/':/YOUR/PATH/TO/arm-gnu-toolchain-VERSION-x86_64-arm-none-linux-gnueabihf/bin/'/}
      

Configure and Build the Linux kernel

Now you have to configure the Linux kernel according to your hardware. We have two default configuration at91 SoC in arch/arm/configs

arch/arm/configs/at91_dt_defconfig
arch/arm/configs/sama5_defconfig
arch/arm/configs/sama7_defconfig

• at91_dt_defconfig: for SAM9 (ARM926) series chips
• sama5_defconfig: for SAMA5 series chips
• sama7_defconfig: for SAMA7 series chips

Now we Configure and Build kernel for sama5d27_som1_ek board:

$ make ARCH=arm sama5_defconfig
  HOSTCC  scripts/basic/fixdep
  HOSTCC  scripts/kconfig/conf.o
  SHIPPED scripts/kconfig/zconf.tab.c
  SHIPPED scripts/kconfig/zconf.lex.c
  SHIPPED scripts/kconfig/zconf.hash.c
  HOSTCC  scripts/kconfig/zconf.tab.o
  HOSTLD  scripts/kconfig/conf
#
# configuration written to .config
#

At this step, you can modify default configuration using the menuconfig

$ make ARCH=arm menuconfig

Now, in the menuconfig dialog, you can easily add or remove some features. Once done, Move to <Exit> with arrows and press this button hitting the Enter key to exit from this screen.

Build the Linux kernel image, before you build you need set up the cross compile toolchain, check this section.

$ make ARCH=arm

[..]

  Kernel: arch/arm/boot/Image is ready
  Kernel: arch/arm/boot/zImage is ready

Now you have an usable compressed kernel image zImage.

If you need an uImage you can run this additional step:

make ARCH=arm uImage LOADADDR=0x20008000

[..]

  Kernel: arch/arm/boot/zImage is ready
  UIMAGE  arch/arm/boot/uImage
  Image Name:   Linux-6.6.23-linux4microchip-202
  Created:      Thu May 16 14:36:06 2024
  Image Type:   ARM Linux Kernel Image (uncompressed)
  Data Size:    5221704 Bytes = 5099.32 KiB = 4.98 MiB
  Load Address: 20008000
  Entry Point:  20008000
  Kernel: arch/arm/boot/uImage is ready

make ARCH=arm dtbs

[..]

  DTC     arch/arm/boot/dts/microchip/at91-sam9x60_curiosity.dtb
  DTC     arch/arm/boot/dts/microchip/at91-sam9x60ek.dtb
  DTC     arch/arm/boot/dts/microchip/at91-sam9x75_curiosity.dtb
  DTC     arch/arm/boot/dts/microchip/at91-sam9x75eb.dtb  
  DTC     arch/arm/boot/dts/microchip/at91-sama5d27_som1_ek.dtb
  DTC     arch/arm/boot/dts/microchip/at91-sama5d27_wlsom1_ek.dtb
  DTC     arch/arm/boot/dts/microchip/at91-sama5d29_curiosity.dtb
  DTC     arch/arm/boot/dts/microchip/at91-sama5d2_icp.dtb
  DTC     arch/arm/boot/dts/microchip/at91-sama5d2_ptc_ek.dtb
  DTC     arch/arm/boot/dts/microchip/at91-sama5d2_xplained.dtb
  DTC     arch/arm/boot/dts/microchip/at91-sama7d65_curiosity.dtb
  DTC     arch/arm/boot/dts/microchip/at91-sama7g5ek.dtb

[..]

If the building process is successful, the final images can be found under arch/arm/boot/ directory.

Build Yocto/Poky rootfs from sources

Note that building an entire distribution is a long process. It also requires a big amount of free disk space.

The support for Microchip AT91 SoC family is included in a particular Yocto Project layer: meta-atmel. The source for this layer are hosted on Linux4SAM GitHub account: https://github.com/linux4sam/meta-atmel

Building environment

A step-by-step comprehensive installation is explained in the Yocto Project Quick Build. The following lines have to be considered as an add-on that is AT91 specific or that can facilitate your setup.

Prerequisite

Here are the reference pages for setting up a Yocto Project building environment: What You Need and How You Get It.

add git-lfs to the package requirement list from whichever Linux distribution you use.

For instance, on Ubuntu or debian, these packages need to be installed on your development host:

sudo apt-get install gawk wget git-core git-lfs diffstat unzip texinfo gcc-multilib \
     build-essential chrpath socat cpio python3 python3-pip python3-pexpect \
     xz-utils debianutils iputils-ping python3-git python3-jinja2 libegl1-mesa libsdl1.2-dev \
     pylint3 xterm

Step by step build procedure

here is a copy of the README procedure available directly in the meta-atmel layer. This file in the meta-atmel layer repository must be considered as the reference and the following copy can be out-of-sync.

starting with Linux4SAM 2021.04 release, the meta-atmel layer supports Yocto Project templates, so make sure you create a new build environment using oe-init-build-env

This layer provides support for Microchip microprocessors (aka AT91)
====================================================================

For more information about the Microchip MPU product line see:
http://www.microchip.com/design-centers/32-bit-mpus
Linux & Open Source on Microchip microprocessors:
http://www.linux4sam.org


Supported SoCs / MACHINE names
==============================
Note that most of the machine names below, have a SD Card variant that can be
built by adding an "-sd" suffix to the machine name.
- SAMA5D2 product family / sama5d2-xplained, sama5d2-xplained-emmc, sama5d27-som1-ek-sd, sama5d27-som1-ek-optee-sd, sama5d2-ptc-ek, sama5d2-icp, sama5d27-wlsom1-ek-sd, sama5d29-curiosity-sd
- SAMA5D4 product family / sama5d4ek, sama5d4-xplained
- SAMA5D3 product family / sama5d3xek, sama5d3-xplained
- AT91SAM9x5 product family (AT91SAM9G15, AT91SAM9G25, AT91SAM9X25, AT91SAM9G35 and AT91SAM9X35) / at91sam9x5ek
- AT91SAM9RL / at91sam9rlek
- AT91SAM9G45 / at91sam9m10g45ek
- SAM9X60 / sam9x60ek, sam9x60-curiosity
- SAMA7G5 / sama7g5ek-sd, sama7g5ek-emmc, sama7g5ek-ospi
- SAM9X75 / sam9x75eb, sam9x75-curiosity


Sources
=======
- meta-atmel
URI: https://github.com/linux4sam/meta-atmel.git
Branch: kirkstone
Tag: linux4microchip-2024.04

Dependencies
============
This Layer depends on :
- poky
URI: https://git.yoctoproject.org/poky
Branch: kirkstone
Tag: yocto-4.0.17

- meta-openembedded
URI: https://git.openembedded.org/meta-openembedded
Branch: kirkstone
Tag/commit: 8bb16533532b6abc2eded7d9961ab2a108fd7a5b

- meta-arm (for optee components)
URI: https://git.yoctoproject.org/meta-arm
Branch: kirkstone
Tag: yocto-4.0.2

Build procedure
===============

0/ Create a directory
mkdir my_dir
cd my_dir

1/ Clone yocto/poky git repository with the proper branch ready
git clone https://git.yoctoproject.org/poky && cd poky && \
git checkout -b kirkstone yocto-4.0.17 && cd -

2/ Clone meta-openembedded git repository with the proper branch ready
git clone git://git.openembedded.org/meta-openembedded && \
cd meta-openembedded && git checkout -b kirkstone 8bb165 && cd -

3/ Clone meta-atmel layer with the proper branch ready
git clone https://github.com/linux4sam/meta-atmel.git
git checkout -b kirkstone linux4microchip-2024.04 && cd -

4/ Clone meta-arm layer with the proper branch ready
git clone https://git.yoctoproject.org/meta-arm && cd meta-arm && \
git checkout -b kirkstone yocto-4.0.2 && cd -

5/ Enter the poky directory to configure the build system and start the build process
cd poky
If not created yet, add a new "build-microchip" directory:
mkdir build-microchip
Else, if it's the first time you use Yocto Project templates, and if the
build-microchip directory remains from a previous use, we advise you to start
from a fresh directory. Keep your build-microchip/conf/local.conf file for
reference.

6/ Inside the .templateconf file, you will need to modify the TEMPLATECONF
variable to match the path to the meta-atmel layer "conf" directory:
export TEMPLATECONF=${TEMPLATECONF:-../meta-atmel/conf}

7/ Initialize build directory
source oe-init-build-env build-microchip

8/ To build a small image provided by Yocto Project:
[MACHINE=] bitbake core-image-minimal

Example for sama5d2-xplained-sd SD card image:
MACHINE=sama5d2-xplained-sd bitbake core-image-minimal

9/ To build the microchip image with no graphics support:
[MACHINE=] bitbake microchip-headless-image

Example for sama5d2-xplained-sd SD card image:
MACHINE=sama5d2-xplained-sd bitbake microchip-headless-image

10/ To build the microchip image with graphics support (EGT):
[MACHINE=] bitbake microchip-graphics-image

Example for sama5d2-xplained-sd SD card image:
MACHINE=sama5d2-xplained-sd bitbake microchip-graphics-image

Typical bitbake output
======================
Build Configuration:
BB_VERSION           = "2.0.0"
BUILD_SYS            = "x86_64-linux"
NATIVELSBSTRING      = "universal"
TARGET_SYS           = "arm-poky-linux-gnueabi"
MACHINE              = "sam9x75-curiosity-sd"
DISTRO               = "poky-atmel"
DISTRO_VERSION       = "4.0.17"
TUNE_FEATURES        = "arm armv5 thumb dsp"
TARGET_FPU           = "soft"
meta                 
meta-poky            
meta-yocto-bsp       = "heads/kirkstone-4.0.17:6d1a878bbf24c66f7186b270f823fcdf82e35383"
meta-oe
meta-networking
meta-webserver
meta-python
meta-initramfs       = "8bb16533532b6abc2eded7d9961ab2a108fd7a5b:8bb16533532b6abc2eded7d9961ab2a108fd7a5b"
meta-atmel           = "heads/linux4microchip-2024.04-rc2:fd6500c866002b78e8ec752e11e34cff0acbc044"
meta-multimedia      = "8bb16533532b6abc2eded7d9961ab2a108fd7a5b:8bb16533532b6abc2eded7d9961ab2a108fd7a5b"
meta-arm
meta-arm-toolchain   = "heads/yocto-4.0.2:96aad3b29aa7a5ee4df5cf617a6336e5218fa9bd"


Contributing
============
To contribute to this layer you should submit the patches for review to:
the github pull-request facility directly or the forum. Anyway, don't forget to
Cc the maintainers.

Microchip Forum:
https://www.microchip.com/forums/f542.aspx

for some useful guidelines to be followed when submitting patches:
http://www.openembedded.org/wiki/How_to_submit_a_patch_to_OpenEmbedded

Maintainers:
Hari Prasath G E 
Nicolas Ferre 

When creating patches insert the [meta-atmel] tag in the subject, for example
use something like:
git format-patch -s --subject-prefix='meta-atmel][PATCH' 

eMMC support on SDMMC0

The board is equipped with 8bit connector on SDMMC0 slot, which allows eMMC memories to be connected with an SD-Card adapter. Also the PCB is capable of switching the voltage to 1.8v (from backwards compatible 3.3V which is default).
This page contains information about which eMMCs were tested and the result, also how to configure the software to be able to boot and use eMMC on adapter boards.

Recent FAQ

Sama5d27Som1EK

• Using Atmel DRMDriver: Using Atmel KMS/DRM LCD driver. (Kernel, linux-3.18-at91, linux-4.1-at91, linux-4.4-at91, linux-4.9-at91, linux-4.14-at91, linux-4.19-at91, linux-5.4-at91, linux-5.10-at91, linux-5.15-mchp, linux-6.1-mchp, linux-6.6-mchp)
• U-Boot FAQ: Some U-Boot FAQ entries. (U-Boot)
• Using FITwith Overlays: How to use U-boot with FIT image to load overlays. (U-Boot, Kernel)
• Patching DTin Uboot: How to apply DTBOs in U-boot. (U-Boot, Kernel)
• Using Systemd: Basic systemd user guide. (linux-6.1-mchp, linux-6.6-mchp, BuildRoot, YoctoProject)
• Using SAMA 5 D 2 ADCDevice: Using the SAMA5D2-compatible ADC device. (Kernel, linux-5.15-mchp, linux-6.1-mchp, linux-6.6-mchp)
• Connect Module From PDA: How to connect LCD module from PDA to the Boards. (Kernel)
• Convert SAMBAScript: SAM-BA API revisions. (SAM-BA)
• Crypto Config: How to configure Crypto driver. (Kernel, linux-3.18-at91, linux-4.1-at91, linux-4.4-at91, linux-4.9-at91, linux-4.14-at91, linux-4.19-at91, linux-5.4-at91, linux-5.10-at91, linux-5.15-mchp, linux-6.1-mchp, linux-6.6-mchp)
• USBGadget Config: Configure AT91 USB Gadget on Linux and Endpoint order management (composite USB). (Kernel, linux-4.4-at91, linux-4.9-at91, linux-4.14-at91, linux-4.19-at91, linux-5.4-at91, linux-5.10-at91, linux-5.15-mchp, linux-6.1-mchp, linux-6.6-mchp)
• Pwm Faq: PWM Driver. (Kernel, linux-3.10-at91, linux-3.18-at91, linux-4.1-at91, linux-4.4-at91, linux-4.9-at91, linux-4.14-at91, linux-4.19-at91, linux-5.4-at91, linux-5.10-at91, linux-5.15-mchp, linux-6.1-mchp, linux-6.6-mchp)
• Media Controller: What is Media controller and how to use it with SAM products.. (linux-5.15-mchp, linux-6.1-mchp, linux-6.6-mchp)
• ISCWhite Balance Features: White balance features of the Image sensor controller.. (Kernel, linux-4.19-at91, linux-5.4-at91, linux-5.10-at91, linux-5.15-mchp, linux-6.1-mchp, linux-6.6-mchp)
• External Component On EBI: Connecting an external component on the External Bus Interface. (Kernel, linux-4.14-at91, linux-4.19-at91, linux-5.4-at91, linux-5.10-at91, linux-5.15-mchp, linux-6.1-mchp, linux-6.6-mchp)
• Build Issue Buildroot G 1: Buildroot gst1-at91-gstreamer. (BuildRoot)
• SDCard Boot Notice: How to boot up the board from SD card. (AT91Bootstrap)