On Thursday, September 26, 2013 1:26:27 PM UTC-4, David Anders wrote: > http://elinux.org/BeagleBone_Black_Extracting_eMMC_contents >
Added. Feedback welcome. > > is a good place to start. i am working with bill traynor to organize > howto pages along with other specific category groups... > > Dave > > On 09/26/2013 12:23 PM, Jason Kridner wrote: > > On Thursday, September 26, 2013 1:20:18 PM UTC-4, David Anders wrote: > > > >> Jason, > >> > >> shouldn't this info go up on the elinux.org wiki? > >> > > Absolutely. Any recommendation on the page location? I will upload it > right > > away. > > > > > >> Dave > >> > >> On 09/26/2013 12:16 PM, Jason Kridner wrote: > >>> There are lots of ways to extract the contents of the eMMC to save off > >> and > >>> reuse. I'm proposing a method using Buildroot and an initramfs such > that > >>> you can simply drop a few files from a .zip onto a normal, > FAT-formatted > >> SD > >>> card to perform the extraction. There are several things really handy > >> here, > >>> such as the ability to edit autorun.sh to be whatever script you want > to > >>> run on your board at boot. In the archive, I only have the necessary > >>> autorun.sh for *saving* your eMMC content. The flip-side is provided > >> here > >>> in the text such that you need to go through a couple of steps before > >> you > >>> trash your eMMC. > >>> > >>> The steps for saving off your eMMC contents to a file: > >>> * Get a 4GB or larger uSD card that is FAT formatted. > >>> * Download > >> https://s3.amazonaws.com/beagle/beagleboneblack-save-emmc.zipand > >>> extract the contents onto your uSD card. > >>> * Eject uSD card from your computer, insert into powered-off > BeagleBone > >>> Black and apply power to your board. > >>> * You'll notice USR0 (the LED closest to the S1 button in the corner) > >> will > >>> (after about 20 seconds) start to blink steadily, rather than the > >>> double-pulse "heartbeat" pattern that is typical when your BeagleBone > >> Black > >>> is running the typical Linux kernel configuration. > >>> * It'll run for a bit under 10 minutes and then USR0 will stay ON > >> steady. > >>> That's your cue to remove power, remove the uSD card and put it back > >> into > >>> your computer. > >>> * You should see a file called BeagleBoneBlack-eMMC-image-XXXXX.img, > >> where > >>> XXXXX is a set of random numbers. Save off this file to use for > >> restoring > >>> your image later. > >>> > >>> Because the date won't be set on your board, you might want to adjust > >> the > >>> date on the file to remember when you made it. Delete the file if you > >> want > >>> to make room for a new backup image. For storage on your computer, > these > >>> images will typically compress very well, so use your favorite > >> compression > >>> tool. > >>> > >>> To restore the file, make sure there is a valid > >>> BeagleBoneBlack-eMMC-image-XXXX.img file on the uSD card and edit > >>> autorun.sh with your favorite text editor to contain the following: > >>> #!/bin/sh > >>> echo timer > /sys/class/leds/beaglebone\:green\:usr0/trigger > >>> dd if=/mnt/BeagleBoneBlack-eMMC-image-XXXXX.img of=/dev/mmcblk1 bs=10M > >>> sync > >>> echo default-on > /sys/class/leds/beaglebone\:green\:usr0/trigger > >>> > >>> *NOTE*: Be certain to replace the 'XXXXX' above with the proper name > of > >>> your image file. > >>> > >>> This image was built using Buildroot. The sources are at > >>> https://github.com/jadonk/buildroot with tag save-emmc-0.0.1. > Download > >> via > >>> https://github.com/jadonk/buildroot/releases/tag/save-emmc-0.0.1 or > >> clone > >>> the git repo. It is a small fork from > >>> git://git.buildroot.net/buildroottag > >>> e9f6011617528646768e69203e85fe64364b7efd. > >>> > >>> To build, 'make beagleboneblack_defconfig; make; ./mkuimage.sh'. > Output > >>> files (am335x-boneblack.dtb, MLO, u-boot.img and uImage) will be in > the > >>> output/images subdirectory. The following files were created manually. > >>> > >>> uEnv.txt: > >>> bootpart=0:1 > >>> bootdir= > >>> fdtaddr=0x81FF0000 > >>> optargs=quiet capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN > >>> uenvcmd=load mmc 0 ${loadaddr} uImage;run loadfdt;setenv bootargs > >>> console=${console} ${optargs};bootm ${loadaddr} - ${fdtaddr} > >>> > >>> autorun.sh: > >>> #!/bin/sh > >>> echo timer > /sys/class/leds/beaglebone\:green\:usr0/trigger > >>> dd if=/dev/mmcblk1 of=/mnt/BeagleBoneBlack-eMMC-image-$RANDOM.img > bs=10M > >>> sync > >>> echo default-on > /sys/class/leds/beaglebone\:green\:usr0/trigger > >>> > >>> The kernel is based on > >>> > >> > https://github.com/beagleboard/kernel/commit/9fdb452245a58158a4bea787cdc663c17681bcfe, > > > >> > >>> but I applied the patches, added firmware and uploaded it to > >>> > >> > https://github.com/beagleboard/linux/commit/ddd36e546e53d3c493075bbebd6188ee843208f9to > > >>> pull down in the Buildroot makefile. The link to the source for the > >>> firmware is in the commit. > >>> > >>> I've applied to join the Buildroot mailing list to send these patches > >>> upstream. The power management firmware is not yet loading properly, > but > >>> that is something I can look into. > >>> > >>> Happy hacking! > >>> > >> > > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
