Sama5d3 Xplained
SoC Features
Operating at 850DMIPS at under 150mW, the SAMA5D3 MPU is ideal for any high-performance, low-power and cost-sensitive industrial application. Think of it for control panels, smart grid devices and bar code scanners—anything that needs high levels of connectivity, enhanced user interfaces, robust security or is battery powered. The SAMA5D3 is also an ideal fit for wearable computing and mobile applications where low power and a small footprint are critical. The SAMA5D3 series includes devices supporting a -40/+105°C temperature range as well as 12x12mm BGA324 package (in 0.5mm pitch).
Kit Information
Kit Overview
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Access the console
The usual serial communication parameters are 115200 8-N-1 :
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Access the console
You can access the serial console through two ways:
- the DBGU port with the help of a USB TTL serial cable,
- the USB CDC device once Linux has started.
DBGU port
- For Microsoft Windows users: Install the driver of your USB TTL serial cable. FTDI-based ones are the most popular, have a look to this page to get the driver: http://www.ftdichip.com/Drivers/VCP.htm
- Connect the cable to the board (J23)
- For Microsoft Windows users: Identify the USB connection that is established, USB Serial Port should appear in Device Manager. The COMxx number will be used to configure the terminal emulator.
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- For Linux users: Identify the serial USB connection by monitoring the last lines of dmesg command. The /dev/ttyUSBx number will be used to configure the terminal emulator.
[605576.562740] usb 1-1.1.2: new full-speed USB device number 17 using ehci-pci [605576.660920] usb 1-1.1.2: New USB device found, idVendor=0403, idProduct=6001 [605576.660933] usb 1-1.1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [605576.660939] usb 1-1.1.2: Product: TTL232R-3V3 [605576.660944] usb 1-1.1.2: Manufacturer: FTDI [605576.660958] usb 1-1.1.2: SerialNumber: FTGNVZ04 [605576.663092] ftdi_sio 1-1.1.2:1.0: FTDI USB Serial Device converter detected [605576.663120] usb 1-1.1.2: Detected FT232RL [605576.663122] usb 1-1.1.2: Number of endpoints 2 [605576.663124] usb 1-1.1.2: Endpoint 1 MaxPacketSize 64 [605576.663126] usb 1-1.1.2: Endpoint 2 MaxPacketSize 64 [605576.663128] usb 1-1.1.2: Setting MaxPacketSize 64 [605576.663483] usb 1-1.1.2: FTDI USB Serial Device converter now attached to ttyUSB0
A /dev/ttyUSB0 node has been created.
- Now open your favorite terminal emulator with appropriate settings
USB device port
Once Linux started, the serial USB gadget module is probed. Then you can get a serial console through the USB device interface.
- For Windows users: You may have to install a driver for the USB-CDC device that corresponds to the SAMA5D3 Xplained board. The official .inf file needed to configure the USB-CDC driver: https://www.kernel.org/doc/Documentation/usb/linux-cdc-acm.inf
- For Windows users: Identify the USB connection that is established, Gadget Serial should appear in Device Manager. The COMxx number will be used to configure the terminal emulator.
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- 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.
[609470.350006] usb 2-1.2: new high-speed USB device number 17 using ehci-pci [609470.443102] usb 2-1.2: New USB device found, idVendor=0525, idProduct=a4a7 [609470.443107] usb 2-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [609470.443111] usb 2-1.2: Product: Gadget Serial v2.4 [609470.443113] usb 2-1.2: Manufacturer: Linux 3.10.0-yocto-standard with atmel_usba_udc [609470.450258] cdc_acm 2-1.2:2.0: This device cannot do calls on its own. It is not a modem. [609470.450314] cdc_acm 2-1.2:2.0: ttyACM0: USB ACM device
- Now open your favorite terminal emulator with appropriate settings
Demo
Demo archives
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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 Etcher. 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 Etcher website.
- Insert your SD card and launch Etcher:
- 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 uncompress files on the fly - Select the device corresponding to your SD card (Etcher proposes you the devices that are removable to avoid erasing your system disk)
- Click on the Flash! button
- 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)
- 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!
Flash the demo
use SAM-BA 3.5.y onwards. You can download it here: SAM-BA 3.x release page.
Connect the USB to the board before launching SAM-BA
- Open JP5 to disable NAND Flash memory access
- Press BP2 reset button to boot from on-chip Boot ROM
- Close JP5 to enable NAND Flash memory access
- For Microsoft Windows users: verify that the USB connection is well established
AT91 USB to Serial Converter should appear in Device Manager. If it shows a unknown device you need to download and install the driver: AT91SAM USB CDC driver
- For Linux users: check /dev/ttyACMx by monitoring the last lines of dmesg command:
- For Microsoft Windows users: verify that the USB connection is well established
[172677.700868] usb 2-1.4.4: new full-speed USB device number 31 using ehci-pci [172677.792677] usb 2-1.4.4: not running at top speed; connect to a high speed hub [172677.793418] usb 2-1.4.4: New USB device found, idVendor=03eb, idProduct=6124 [172677.793424] usb 2-1.4.4: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [172677.793897] cdc_acm 2-1.4.4:1.0: This device cannot do calls on its own. It is not a modem. [172677.793924] cdc_acm 2-1.4.4:1.0: ttyACM0: USB ACM device
idVendor=03eb, idProduct=6124: from this message you can see it's Microchip board USB connection.
Run script to flash the demo
- download the demo package for the board. They are marked as "Media type: NAND Flash " in the table above
- extract the demo package
- run your usual terminal emulator and enter the demo directory
- make sure that the sam-ba application is in your Operating System path so that you can reach it from your demo package directory
- for Microsoft Windows users: Launch the demo_linux_nandflash.bat file
- for Linux users: Launch the demo_linux_nandflash.sh file
- this script runs SAM-BA 3 and the associated QML sam-ba script (demo_linux_nandflash_usb.qml) with proper parameters
- when you reach the end of the flashing process (this will take a few minutes), the following line is written:
-I- === Done. ===
- connect a serial link on DBGU and open the terminal emulator program as explained just above
- power cycle the board
- monitor the system while it's booting on the LCD screen or through the serial line
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:
sama5d3_xplainednf_linux_uimage_dt_defconfig sama5d3_xplainednf_linux_zimage_dt_defconfig sama5d3_xplainednf_uboot_defconfig sama5d3_xplainedsd_linux_uimage_dt_defconfig sama5d3_xplainedsd_linux_zimage_dt_defconfig sama5d3_xplainedsd_uboot_defconfig
Tips: nf means to read nandflash, df means to read serial flash, sd means to read mmc card. Tips: linux means to load linux kernel to RAM, android means to load android kernel to RAM, uboot means to load u-boot to RAM, dt means to load dtb to RAM.
You can configure AT91Bootstrap to load U-Boot binary from NAND flash by doing:
$ make mrproper $ make sama5d3_xplainednf_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 Linux4SAM GitHub U-Boot repository:
- clone the Linux4sam 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 nandflash (default): sama5d3_xplained_nandflash_defconfig # To put environment variables in SD/MMC card: sama5d3_xplained_mmc_defconfig
Here are the building steps for the SAMA5D3-Xplained board:
# You can change the config according to your needs. make sama5d3_xplained_nandflash_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 sama5d3_xplained 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-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 Atmel AT91 SoC family is included in a particular Yocto 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 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 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'
Using SAM-BA to flash components to board
NAND Flash demo - Memory map
Install SAM-BA software in your PC
In addition to the official SAM-BA pages on http://www.microchip.com, we maintain information about SAM-BA in the SoftwareTools page.
use SAM-BA 3.5.y onwards. You can download it here: SAM-BA 3.x release page.
Launch SAM-BA tools
- According to this section make sure that the chip can execute the SAM-BA Monitor.
In addition to the Qt5 QML language for scripting used for flashing the demos, most common SAM-BA action can be done using SAM-BA command line.
For browsing information on the SAM-BA command line usage, please see the Command Line Documentation that is available in the SAM-BA installation directory: doc/index.html or doc/cmdline.html .
SAM-BA includes command line interface that provides support for the most common actions:
- reading / writing to arbitrary memory addresses and/or peripherals
- uploading applets and using them to erase/read/write external memories
The command line interface is designed to be self-documenting.
The main commands can be listed using the "sam-ba --help" command:
SAM-BA Command Line Tool v3.5
Copyright 2018 Microchip Technology
Usage: ./sam-ba [options]
SAM-BA Command Line Tool
Options:
-v, --version Displays version information.
-h, --help Displays this help.
-t, --tracelevel <trace_level> Set trace level to <trace_level>.
-L, --applet-buffer-limit <SIZE> Set applet buffer limit to <SIZE>
bytes (default 131072).
-x, --execute <script.qml> Execute script <script.qml>.
-p, --port <port[:options:...]> Communicate with device using <port>.
-d, --device <device[:options:...]> Connected device is <device>.
-b, --board <board[:options:...]> Connected board is <board>.
-m, --monitor <command[:options:...]> Run monitor command <command>.
-a, --applet <applet[:options:...]> Load and initialize applet <applet>.
-c, --command <command[:args:...]> Run command <command>.
-w, --working-directory <DIR> Set working directory to <DIR>.
Additional help can be obtained for most commands by supplying a "help" parameter that will display their usage.
For example "sam-ba --port help" will display:
Known ports: j-link, serial, secure
Command that take an argument with options (port, monitor, applet) will display even more documentation when called with "help" as option value.
For example "sam-ba --port serial:help" will display:
Syntax:
serial:[<port>]:[<baudrate>]
Examples:
serial serial port (will use first AT91 USB if found otherwise first serial port)
serial:COM80 serial port on COM80
serial:ttyUSB0:57600 serial port on /dev/ttyUSB0, baudrate 57600Configure NAND ECC
Using default PMECC parameters
when choosing the board variant with the -b parameter of SAM-BA, the default PMECC configuration for the NAND populated on the board is valid. You can verify its value by running the command that reads one byte in a dummy file (named test.bin in the following command):
# sam-ba -p serial -b sama5d3-xplained -a nandflash -c read:test.bin:0:1 Opening serial port 'ttyACM0' Connection opened. Detected memory size is 536870912 bytes. Page size is 4096 bytes. Buffer is 20480 bytes (5 pages) at address 0x0020a240. NAND header value is 0xc1e04e07. Supported erase block sizes: 256KB Executing command 'read:test.bin:0:1' Read 1 bytes at address 0x00000000 (100.00%) Connection closed.
You can figure out that the default PMECC parameter for this sama5d3-xplained board is 0xc1e04e07.
: Note that if you connect a serial console to the SoC RomCode default UART, you can see even more details about the NAND ECC parameters given by the SAM-BA Applet:
Applet 'NAND Flash' from softpack 3.5 (v3.5). Initializing NAND ioSet1 Bus Width 8 PMECC configuration: 0xc1e04e07 Sector size: 512 Sectors per page: 8 Spare size: 224 ECC bits: 8 ECC offset: 120 ECC size: 104 PMECC enabled Buffer Address: 0x0020a240 Buffer Size: 20480 bytes NAND applet initialized successfully.
If you want to change the default PMECC parameters you can simply specify another value on the SAM-BA command line with the -a nandflash argument as shown below:
# sam-ba -p serial -b sama5d3-xplained -a nandflash:help
Syntax: nandflash:[<ioset>]:[<bus_width>]:[<header>]
Parameters:
ioset I/O set
bus_width NAND bus width (8/16)
header NAND header value
Examples:
nandflash use default board settings
nandflash:2:8:0xc0098da5 use fully custom settings (IOSET2, 8-bit bus, header is 0xc0098da5)
nandflash:::0xc0098da5 use default board settings but force header to 0xc0098da5
For information on NAND header values, please refer to SAMA5D4 datasheet section "12.4.4 Detailed Memory Boot Procedures".
By reading this in-line documentation we can specify the NAND PMECC parameter with this command:
# sam-ba -p serial -b sama5d3-xplained -a nandflash:::0xc1e04e07 Opening serial port 'ttyACM0' Connection opened. Detected memory size is 536870912 bytes. Page size is 4096 bytes. Buffer is 20480 bytes (5 pages) at address 0x0020a240. NAND header value is 0xc1e04e07. Supported erase block sizes: 256KB Connection closed.
Programming components into NAND
Program AT91Bootstrap binary
Run SAM-BA with USB connection (equivalent to serial) and erase the beginning of the NAND flash and then write AT91Bootstrap binary:
# sam-ba -p serial -b sama5d3-xplained -a nandflash -c erase::0x40000 -c writeboot:at91bootstrap-sama5d3_xplained.bin Opening serial port 'ttyACM0' Connection opened. Detected memory size is 536870912 bytes. Page size is 4096 bytes. Buffer is 20480 bytes (5 pages) at address 0x0020a240. NAND header value is 0xc1e04e07. Supported erase block sizes: 256KB Executing command 'erase::0x40000' Erased 262144 bytes at address 0x00000000 (100.00%) Executing command 'writeboot:at91bootstrap-sama5d3_xplained.bin' Prepended NAND header prefix (0xc1e04e07) Appending 4008 bytes of padding to fill the last written page Wrote 20480 bytes at address 0x00000000 (83.33%) Wrote 4096 bytes at address 0x00005000 (100.00%) Connection closed.
Program U-Boot binary
Run SAM-BA with USB connection (equivalent to serial) and erase the U-Boot section in the NAND flash memory map and then write U-Boot binary:
# sam-ba -p serial -b sama5d3-xplained -a nandflash -c erase:0x40000:0x80000 -c write:u-boot-sama5d3-xplained.bin:0x40000 Opening serial port 'ttyACM0' Connection opened. Detected memory size is 536870912 bytes. Page size is 4096 bytes. Buffer is 20480 bytes (5 pages) at address 0x0020a240. NAND header value is 0xc1e04e07. Supported erase block sizes: 256KB Executing command 'erase:0x40000:0x80000' Erased 262144 bytes at address 0x00040000 (50.00%) Erased 262144 bytes at address 0x00080000 (100.00%) Executing command 'write:u-boot-sama5d3-xplained.bin:0x40000' Appending 3137 bytes of padding to fill the last written page Wrote 20480 bytes at address 0x00040000 (4.59%) Wrote 20480 bytes at address 0x00045000 (9.17%) Wrote 20480 bytes at address 0x0004a000 (13.76%) [..] Wrote 20480 bytes at address 0x00094000 (81.65%) Wrote 20480 bytes at address 0x00099000 (86.24%) Wrote 20480 bytes at address 0x0009e000 (90.83%) Wrote 20480 bytes at address 0x000a3000 (95.41%) Wrote 20480 bytes at address 0x000a8000 (100.00%) Connection closed.
Related Topics
- Convert SAM-BA scripts
- How to configure Crypto driver
- USB Gadget Configuration
- How to use Pulse Width Modulation driver
- How to use the Atmel KMS/DRM LCD driver
- External Component on External Bus Interface
- SD card boot for AT91SAM SoC
- Hash error when booting FIT image
- Using FIT Image and Device Tree Overlays
- U-Boot FAQ
- Use of the AT91 ADC driver
- Connect Module From PDA
- Enable and Configure PMECC (Programmable Multibit ECC) in AT91SAM SoC
- Compiling Linux Kernel fails looking at OpenSSL header files
- PDA detection at boot time
- How to manually select (or enforce) the PDA at boot time