Linux on the STM32F769I Discovery board with Buildroot

The project is a set of patches and configuration files to build a bootloader and a Linux based system image with a minimal root file system for the great STM32F769I Discovery board.

Build

Let's download, extract and patch Buildroot:

$ make bootstrap

Then build:

$ make build

After the build, the directory buildroot/output/images/ contains

• U-Boot images u-boot-spl.bin and u-boot.bin
• compressed Linux kernel with linked RAM filesystem zImage
• device tree blob stm32f769-disco.dtb

Run

Flash U-Boot:

$ make flash_bootloader

U-Boot is pre-configured to load a kernel file called /stm32f769/zImage and a DTB called /stm32f769/stm32f769-disco.dtb from the first partition of the micro SD card. If the user button (the blue one) is press when U-Boot starts, then those files are loaded over TFTP from a host with IP 192.168.201.6.

Changelog

• 0.2

  • Buildroot 2018.02
  • GCC 7.3.0
  • U-Boot v2018.03
  • Linux 4.15.10

• 0.1

  • Buildroot 2016.08.1
  • GCC 4.4.1 (external)
  • U-Boot from Emcraft
  • Linux 4.2 from Emcraft
  • Busybox
  • OpenOCD 0.10.0