kumquat-buildroot

NetCube-Systems-Austria/kumquat-buildroot

History

Dario Binacchi 830e5227d4 configs/stm32f469_disco: enable Linux DRM support The patch [1], which is required for DRM to work properly, has been merged into Linux version 5.14-rc3. There's a 5.14.12 now in stable, so I took that one. After Linux boots, /dev/fb0 will be accessible. You can control the brightness of the display after enabling the framebuffer by running the following commands: ~ # echo 0 0 > /sys/class/graphics/fb0/pan ~ # echo 255 >/sys/class/backlight/40016c00.dsi.0/brightness The brightness ranges from 0 to 255, as you can see running the command: ~ # cat /sys/class/backlight/40016c00.dsi.0/max_brightness [1] 24b5b1978cd5 ("clk: stm32f4: fix post divisor setup for I2S/SAI PLLs") Signed-off-by: Dario Binacchi <dariobin@libero.it> Acked-by: Christophe Priouzeau <christophe.priouzeau@foss.st.com> [Arnout: add explanation to readme.txt] Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>		2021-10-26 21:34:03 +02:00
..
patches	configs/stm32f469_disco_xip_defconfig: alternative defconfig for XIP	2021-08-28 16:58:21 +02:00
extlinux.conf
flash_xip.sh	configs/stm32f469_disco_xip_defconfig: alternative defconfig for XIP	2021-08-28 16:58:21 +02:00
flash.sh
genimage.cfg
linux-xip.config	configs/stm32f469_disco_xip_defconfig: alternative defconfig for XIP	2021-08-28 16:58:21 +02:00
linux.fragment	configs/stm32f469_disco: enable Linux DRM support	2021-10-26 21:34:03 +02:00
post-build.sh
readme_xip.txt	configs/stm32f469_disco_xip_defconfig: alternative defconfig for XIP	2021-08-28 16:58:21 +02:00
readme.txt	configs/stm32f469_disco: enable Linux DRM support	2021-10-26 21:34:03 +02:00

readme.txt

STM32F469 Discovery
===================

This tutorial describes how to use the predefined Buildroot
configuration for the STM32F469 Discovery evaluation platform.

Building
--------

  make stm32f469_disco_defconfig
  make

Flashing
--------

  ./board/stmicroelectronics/stm32f469-disco/flash.sh output/

It will flash the U-boot bootloader.

Creating SD card
----------------

Buildroot prepares an"sdcard.img" image in the output/images/ directory,
ready to be dumped on a SD card. Launch the following command as root:

  dd if=output/images/sdcard.img of=/dev/<your-sd-device>

*** WARNING! This will destroy all the card content. Use with care! ***

For details about the medium image layout and its content, see the
definition in board/stmicroelectronics/stm32f469-disco/genimage.cfg.

Framebuffer
-----------
After Linux boots, /dev/fb0 will be accessible. You can control the
brightness of the display after enabling the framebuffer by running the
following commands:

   # echo 0 0 > /sys/class/graphics/fb0/pan
   # echo 255 >/sys/class/backlight/40016c00.dsi.0/brightness

The brightness ranges from 0 to 255, as you can see running the
command:

   # cat /sys/class/backlight/40016c00.dsi.0/max_brightness