Compiling AT91bootstrap 3.10.4
AT91bootstrap is the 2nd level bootloader used by the Microchip ARM MPUs to initializate the internal
hardware (clocks, peripherals, DDR DRAM, etc) at startup and load the Linux Kernel image from the
first microSD partition.
This article is suggested for these boards:
For the other boards please use the following articles:
Toolchain installation
First of all you need to install the toolchain (cross compiler, linker, etc) on your Linux
Ubuntu PC following this article (tested on Ubuntu 18.04.4 LTS):
Download AT91bootstrap from Microchip GitHub repository:
wget https://github.com/linux4sam/at91bootstrap/archive/refs/tags/v3.10.4.zip
unzip v3.10.4.zip
cd at91bootstrap-3.10.4
Add the AcmeSystems patches:
wget https://www.acmesystems.it/www/at91bootstrap_3_10_4/acme.patch
patch -p1 < acme.patch
Set the board configuration
Aria
make acme-aria_defconfig
Arietta
make acme-arietta_defconfig
Change the default configuration
If you want to take a look to the at91bootstrap configuration run:
make menuconfig
This function could be useful to change for example the Kernel line passed by at91bootstrap
to the kernel.
Compiling
launch the compilation by typing:
make CROSS_COMPILE=arm-linux-gnueabihf-
it will generate a binary fine in ./binaries directory with a different name for any board type.
A symbolic link is generated automatically during the at91bootstrap compilation
so you can refer to it with the name boot.bin.
Copy boot.bin on a bootable class='acmetable' MicroSD
If your board boot everything from the MicroSD copy boot.bin on the first microSD partition by typing:
cp binaries/boot.bin /media/$USER/boot
File used
Features
Index
Buy
Low-power Linux System On Module
- CPU Microchip SAMA5D27
- Cortex A5 @ 500 MHz
- Low power consumption:
Suspend to RAM mode 10mW
Full speed: 396mW
- Debian, Buildroot and Yocto Linux
- Fully open source drivers
Features
Index
Buy
Linux System On Module
- CPU Microchip SAMA5D31
- Cortex A5 @ 536 MHz
- Armhf architecture
- DDR2 RAM 256/512 MB
- Nand FLASH 0/256 MB
- On-board uSD socket
- Size: 53x53 mm
- Plug-in module
- 150 pins 1.27 mm pitch
- TFT parallel interface
- Boot from internal uSD/NAND flash or external eMMC
- Debian, Buildroot and Yocto Linux
- Fully open source drivers
Features
Index
Buy
Linux System On Module
- CPU Microchip AT91SAMG25
- ARM9 @ 400 MHz
- Armel architecture
- DDR2 RAM 128/256 MB
- Size: 40x40 mm
- SMT module
- 96 pins 1.27 mm pitch
- Boot from external uSD or serial flash
- Linux Kernel 5.15 LTS
- Debian, Buildroot and Yocto Linux
- Fully open source drivers
Features
Index
Buy
Linux System On Module
- CPU Microchip AT91SAMG25
- ARM9 @ 400 MHz
- Armel architecture
- DDR2 RAM 128/256 MB
- Size: 53x25 mm
- Plug-in module
- 40 pins 2.54 mm pitch
- Boot from uSD
- Linux Kernel 5.15 LTS
- Debian, Buildroot and Yocto Linux
- Fully open source drivers