i.MX8 - iMX8MEVK - Yocto - Installing an Image

i.MX8
Introduction
SoC Overview Carrier Boards i.MX6 vs i.MX8
iMX8M Evaluation Kit (EVK)
Overview Getting Started Selecting Boot Mode System Setup Software Support Android_SD_Partitions_RidgeRun_Script Loading pre-built images Yocto Support Building Yocto Installing an Image Alternative image loading Android Support Building Android Installing an Image System Recovery
Nitrogen8M
Overview Getting Started Selecting Boot Mode System Setup Software Support Loading pre-built images Yocto Support Building Yocto Installing an Image Alternative image loading Customizing Boot Sequence Android Support Building Android Installing an image System Recovery
Multimedia
GPU OpenGL OpenCL OpenVX OpenVG Vulkan VPU Encoding System Decoding System ISP Support V4L2 Drivers Porting Guide GStreamer Support Package Installation Pipeline Examples Hardware-accelerated plugins RidgeRun Products GstRtspSink GstWebRTC GstPTZR GstQtOverlay
Reference Documentation
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In order to install an image, you must identify your device ID. Check it as follows:

blkid -o list

This is an output example:

user@laptop:~$ blkid -o list
device                     fs_type         label            mount point                     UUID
--------------------------------------------------------------------------------------------------------------------------------
/dev/sda1                  ext4                             /                               819c76f8-187f-46e9-b0c0-350032625bb3
/dev/sda3                  ext4            data             /media/user/data                571e7aea-202e-4daa-8071-a1fc1207f458
/dev/sda5                  swap                             [SWAP]                          4018cfb5-4201-4656-a005-4fe04d06dde1
/dev/sdb1                  ext4            sdcard           (not mounted)                   fe2353ea-7436-457e-9447-8e3f721b0c43
/dev/sdb2                         

Considerations

Each device has numbers at the end, those numbers are related to partitions and they must not be specified to install the image. As example, instead of /dev/sdb1, use /dev/sdb.

Also, the device must be not mounted to successfully write the image.

Installing

Yocto supports several image formats, as example ext4, img, sdcard and wic.

Those files will be created in <Yocto_Dir>/build/tmp/deploy/images/imx8mevk.

In old Yocto versions, the most common image type was sdcard, use dd with this image type.

IMAGE=sdcard.img
DEVICE=/dev/sdb # The device may change in your system
sudo dd if=$IMAGE of=$DEVICE bs=4M && sync 

Recent Yocto versions have wic image type as default format, use bmaptool as follows:

sudo bmaptool copy <image.wic> /dev/<device> --nobmap