1*4882a593SmuzhiyunSTM32F469 Discovery 2*4882a593Smuzhiyun=================== 3*4882a593Smuzhiyun 4*4882a593SmuzhiyunThis tutorial describes how to use the predefined Buildroot 5*4882a593Smuzhiyunconfiguration for the STM32F469 Discovery evaluation platform. 6*4882a593Smuzhiyun 7*4882a593SmuzhiyunBuilding 8*4882a593Smuzhiyun-------- 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun make stm32f469_disco_defconfig 11*4882a593Smuzhiyun make 12*4882a593Smuzhiyun 13*4882a593SmuzhiyunFlashing 14*4882a593Smuzhiyun-------- 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun ./board/stmicroelectronics/stm32f469-disco/flash.sh output/ 17*4882a593Smuzhiyun 18*4882a593SmuzhiyunIt will flash the U-boot bootloader. 19*4882a593Smuzhiyun 20*4882a593SmuzhiyunCreating SD card 21*4882a593Smuzhiyun---------------- 22*4882a593Smuzhiyun 23*4882a593SmuzhiyunBuildroot prepares an"sdcard.img" image in the output/images/ directory, 24*4882a593Smuzhiyunready to be dumped on a SD card. Launch the following command as root: 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun dd if=output/images/sdcard.img of=/dev/<your-sd-device> 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun*** WARNING! This will destroy all the card content. Use with care! *** 29*4882a593Smuzhiyun 30*4882a593SmuzhiyunFor details about the medium image layout and its content, see the 31*4882a593Smuzhiyundefinition in board/stmicroelectronics/stm32f469-disco/genimage.cfg. 32*4882a593Smuzhiyun 33*4882a593SmuzhiyunFramebuffer 34*4882a593Smuzhiyun----------- 35*4882a593SmuzhiyunAfter Linux boots, /dev/fb0 will be accessible. You can control the 36*4882a593Smuzhiyunbrightness of the display after enabling the framebuffer by running the 37*4882a593Smuzhiyunfollowing commands: 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun # echo 0 0 > /sys/class/graphics/fb0/pan 40*4882a593Smuzhiyun # echo 255 >/sys/class/backlight/40016c00.dsi.0/brightness 41*4882a593Smuzhiyun 42*4882a593SmuzhiyunThe brightness ranges from 0 to 255, as you can see running the 43*4882a593Smuzhiyuncommand: 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun # cat /sys/class/backlight/40016c00.dsi.0/max_brightness 46