# Cross Compile Download compiler according to your enviroment as the below link: https://github.com/sifive/freedom-tools/releases/tag/v2020.12.0 Add the compiler to your PATH: export PATH=/home/user/compiler/bin:$PATH # Build Enter the build directory, generate the bootloader-BEAGLEV-xxxxxx.bin.out file after make # Upgrade Follow the instruction as the below link to update the secondboot https://wiki.seeedstudio.com/BeagleV-Update-bootloader-ddr-init-boot-uboot-Recover-bootloader/