46 lines
1.2 KiB
Plaintext
46 lines
1.2 KiB
Plaintext
|
STM32F469 Discovery
|
||
|
|
===================
|
||
|
|
|
||
|
|
This tutorial describes how to use the predefined Buildroot
|
||
|
|
configuration for the STM32F469 Discovery evaluation platform.
|
||
|
|
|
||
|
|
Building
|
||
|
|
--------
|
||
|
|
|
||
|
|
make stm32f469_disco_sd_defconfig
|
||
|
|
make
|
||
|
|
|
||
|
|
Flashing
|
||
|
|
--------
|
||
|
|
|
||
|
|
./board/stmicroelectronics/stm32f469-disco/flash_sd.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
|