For the FOX Board G20 users please read: AcmeBoot - A tiny bootloader for the FOX Board G20
The at91bootstrap binary is called boot.bin and is saved on the first microSD partition. This partition must be FAT16 or FAT32.
At startup RomBOOT, that is the 1st levet booloader saved in the Atmel MPU ROM, searches and loads boot.ini from microSD card to the SRAM located inside the MPU itself and runs it from there.
First of all you need to install the toolchain (cross compiler, linker, etc) on your Linux Ubuntu PC following this article (tested on Ubuntu 15.04):
Download from GitHub the Atmel AT91boostrap version 3.7 sources:
Uncompress it by typing:
$ unzip at91bootstrap-3.7.zip
Move inside the new directory and download the patch from our GitHub repository:
Applying the patch:
~/at91bootstrap-3.7 $ patch -p1 < at91bootstrap-3.7.patch
Check which is the defconfig filename of your board. Form the right column it is possible to download the binary file for your board to save on the first partition and rename as boot.bin.
Board | Ram size | defconfig | binary files (to rename in boot.bin) |
---|---|---|---|
Acqua A5 | 256 MB | acqua-256m_defconfig | acqua-256m-boot.bin |
Acqua A5 | 512 MB | acqua-512m_defconfig | acqua-512m-boot.bin |
Aria G25 | 128 MB | aria-128m_defconfig | aria-128m-boot.bin |
Aria G25 | 256 MB | aria-256m_defconfig | aria-256m-boot.bin |
Arietta G25 | 128 MB | arietta-128m_defconfig | arietta-128m-boot.bin |
Arietta G25 | 256 MB | arietta-256m_defconfig | arietta-256m-boot.bin |
and use it on the following command:
~/at91bootstrap-3.7 $ make defconfig
If you want to take a look to the at91bootstrap config launch:
~/at91bootstrap-3.7 $ make menuconfig
then save and exit.
To launch the compilation type:
~/at91bootstrap-3.7 $ make CROSS_COMPILE=arm-linux-gnueabi- ...
Copy the binary just created on the first partition of SD card renaming it in boot.bin. These exaamples are valid if you are using a zImage format for your Linux image:
For Acqua A5:
~/at91bootstrap-3.7 $ cp binaries/sama5d3_acqua-sdcardboot-linux-zimage-dt-3.7.bin /media/$USER/boot/boot.bin
For Aria G25:
~/at91bootstrap-3.7 $ cp binaries/at91sam9x5_aria-sdcardboot-linux-zimage-dt-3.7.bin /media/$USER/boot/boot.bin
For Arietta G25:
~/at91bootstrap-3.7 $ cp binaries/at91sam9x5_arietta-sdcardboot-linux-zimage-dt-3.7.bin /media/$USER/boot/boot.bin