Build yocto system offline for i.mx8mmini development board

because yocto Most of the required software packages are stored on foreign websites , Domestic download is slow , In order to facilitate everyone to build a file system , We will

The software package downloaded online before construction is packaged in advance . Directory is “i.MX8MM Development board \02-i.MX8MM Development board network disk

Data summary ( No CD content )\08_i.MX8MM Development board Yocto System construction materials \Yocto System source code package ”, Here, the volume is compressed into several

Parts of , Download and decompress and use . If you don't need it, you don't need to download it for the time being . As shown in the figure below ：

（1） adopt SSH Send the compressed package to ubuntu Of “/home” Under the table of contents . As shown in the figure below ：

（2） Then use the command “tar xvf Yocto_20210715.tar.gz” Command decompression Yocto Source code , As shown in the figure below ：

（3） Then execute the following command to modify the permissions of the specified file , As shown in the figure below ：

sudo chmod -R 777 imx-yocto-bsp/

（4） Finally, use the following command to enter the extracted Yocto Source folder . As shown in the figure below ：

cd imx-yocto-bsp/

（5）i.MX A script is provided fsl-setup-release.sh, Can be simplified i.MX Machine settings . The script sets the directory and refers to

Set the configuration files of the machine and the backend . Let's enter the following command ：

DISTRO=fsl-imx-xwayland MACHINE=imx8mmevk source fsl-setup-release.sh -b build-xwayland

（6） We choose to compile an image , Enter the following command . This process takes a long time , Please be patient , There will be more than ten hours , And the net

speed , electric brain with Set up , virtual quasi machine with Set up Yes Turn off , in between Yes Out wrong love condition can use , Ctrl+C end stop , Again Time send use “ bitbake

fsl-image-qt5-validation-imx” structure ,yocto Will skip the work that has been completed before , Go ahead with the task .

bitbake fsl-image-qt5-validation-imx

Entering the following command will rebuild the image , The rebuild process takes a long time , Please be patient .

bitbake fsl-image-qt5-validation-imx -c compile

(7) The images generated by compilation are “imx-yocto-bsp/build-xwayland/tmp/deploy/images/imx8mmevk” Under the table of contents , We

Use command “cd tmp/deploy/images/imx8mmevk” You can view it , As shown in the figure below ：

In the generated file , Some are linked files , Here are the purposes of different documents ：

file name purpose

*.rootfs.manifest   ⽂ List of software in the system

*.rootfs.ext4    Pack it up ext4 Format ⽂ Piece system

*.rootfs.sdcard    Can be directly to write ⼊ SD card , from SD Card started image

*.rootfs.tar.bz2    Pack it up tar.bz2 Format ⽂ Piece system

*.rootfs.tar.xz    Pack it up tar.xz Format ⽂ Piece system

imx-boot-imx8mmevk-sd.bin    Suitable for SD and emmc Starting up u-boot Mirror image

There are different formats uboot, kernel , Device tree , File system mirroring . We only use “tar.bz2” The format is just .

We will fsl-image-qt5-validation-imx-imx8mmevk-20210715012231.rootfs.tar.bz2 File copy to Linux Source code rootfs Compile under directory .