How can i create an image of my linux configuration and flash it into emcc

There are many ways to do it.

Personally I'd probably boot from an 8GB sd card and dd the full content of the eMMC to a file on the card. You can then boot other boards from the same card and dd the file onto their eMMC.

Add combinations of storing the eMMC image on a USB hard drive, an NFS mount, or wherever is convenient.

To save some time / space, boot from SD and use tar with appropriate switches to create an archive of the eMMC filesystem. Then on the board you want to copy it onto you'd have to fdisk the eMMC, create a filesystem, untar the archive, and likely dd a u-boot.imx onto the eMMC in the proper place.  If you're familiar with the BBB that's more or less exactly what their flash process does..

I want to copy the same configuration on more riotboards.

If want to pull the available eMMC flash contents, then you need a SDCARD to which you can copy the eMMC image.

Insert SDCARD on J6 connector.

detect your eMMC and SDCARD using  command ll /dev/mmcblk*

for eMMC i got below

root@linaro-ubuntu-desktop:~# ll /dev/mmcblk*

brw-rw---- 1 root disk 179,  0 1970-01-01 00:00 /dev/mmcblk0

brw-rw---- 1 root disk 179,  8 1970-01-01 00:00 /dev/mmcblk0boot0

brw-rw---- 1 root disk 179, 16 1970-01-01 00:00 /dev/mmcblk0boot1

brw-rw---- 1 root disk 179,  1 1970-01-01 00:00 /dev/mmcblk0p1

root@linaro-ubuntu-desktop:~#

i got below after inserting SDCARD

root@linaro-ubuntu-desktop:~# ll /dev/mmcblk*

brw-rw---- 1 root disk 179,  0 1970-01-01 00:00 /dev/mmcblk0

brw-rw---- 1 root disk 179,  8 1970-01-01 00:00 /dev/mmcblk0boot0

brw-rw---- 1 root disk 179, 16 1970-01-01 00:00 /dev/mmcblk0boot1

brw-rw---- 1 root disk 179,  1 1970-01-01 00:00 /dev/mmcblk0p1

brw-rw---- 1 root disk 179, 24 1970-01-01 00:03 /dev/mmcblk1

brw-rw---- 1 root disk 179, 25 1970-01-01 00:03 /dev/mmcblk1p1

brw-rw---- 1 root disk 179, 26 1970-01-01 00:03 /dev/mmcblk1p2

root@linaro-ubuntu-desktop:~#

 

so my SDCARD is mmcblk1.

dd bs=4096 if=/dev/mmcblk0  of=/dev/mmcblk1

use above command to copy the existing Riotboard Image to SDCARD.

I guess you got the complete riot profile backup now.

How can i handle this with the emcc-flash not the sd-card?.

SDCARD will be a good choice to backup when using dd from eMMC flash.

let me know if this answers your question.

Thanks

Tushar

just for records:

block size can be determined using below command

blockdev --getbsz /dev/mmcblk1

In my case:

➜  ~ df -h

Filesystem      Size  Used Avail Use% Mounted on

/dev/mmcblk0p1   28G   18G  8.8G  67% /

none             16G     0   16G   0% /dev

tmpfs            16G   88K   16G   1% /dev/shm

tmpfs            16G   31M   16G   1% /run

tmpfs           5.0M  4.0K  5.0M   1% /run/lock

tmpfs            16G     0   16G   0% /sys/fs/cgroup

tmpfs           3.2G   12K  3.2G   1% /run/user/120

tmpfs           3.2G  116K  3.2G   1% /run/user/1000

/dev/mmcblk1p1   29G   29G     0 100% /media/lvision/AGX-SD

And I got the following No space left on device ERROR

➜  ~ sudo dd bs=1024 if=/dev/mmcblk0 of=/dev/mmcblk1

[sudo] password for lvision:

dd: error writing '/dev/mmcblk1': No space left on device

30318593+0 records in

30318592+0 records out

31046238208 bytes (31 GB, 29 GiB) copied, 4605.66 s, 6.7 MB/s

while I tried to dd mmcblk0 which is ONLY used 18G to mmcblk1 which is of 29G size.