Webinar On-Demand: Part 1 Introduction - Building Embedded Linux Images with the Yocto Project

[@kraznoxic]

hello - i am looking into building embedded linux images with the yocto project and i feel that this video is outdated. do you have any idea when the updated video will be? i ask because while there are so many documentations online on how to build one, it is very long and confusing and watching these webinars do help get me up to speed.

[@Toradexofficial]

Hi @kraznoxic We have updated instructions to build your custom image based on our latest releases on our Build with Yocto Project Guide": developer.toradex.com/linux-bsp/os-development/build-yocto/build-a-reference-image-with-yocto-projectopenembedded

[@انامسلموكفى]

Thank you for your nice video. I have the problem that the $CC hello.c -o hello give me no bin file after compiling the hello.c program, there is an error : cannot open output file hello : Permission denied. any help Thank you

[@Toradexofficial]

You can find instructions on: developer.toradex.com/linux-bsp/application-development/programming-languages/hello-world-application-on-embedded-linux-ccpp/ or visit our community page: community.toradex.com/

[@palomothings]

Could you share the link for install dependencies in my linux workstation? I'm newer with compile image and I would like the install all toolchain in my workstation. Many thanks.

[@Toradexofficial]

Hello Jesus Gualberto Palomo Garcia, Here is a link on setting up an environment for Embedded Linux application development: developer.toradex.com/knowledge-base/how-to-setup-environment-for-embedded-linux-application-development Please feel free to write in to [e-mail] if in case you need further help. Best regards, Team Toradex

[@ANKITKUMAR-qe9fs]

Hi, i am looking a way to specifically clean just a layer, if you could give an insight on that it would be very beneficial, Thanks.

[@Toradexofficial]

Hi Ankit, We're not 100% sure what do you mean by 'clean just a layer', but if you want to clean a recipe there are 3 commands: bitbake -c clean bitbake -c cleansstate bitbake -c cleanall If you want more information about the difference between each, please consult the 'Manually Called Tasks' section from the manual: www.yoctoproject.org/docs/1.8/mega-manual/mega-manual.html#manually-called-tasks

[@ANKITKUMAR-qe9fs]

Hi, I really appreciate the help. Im kind of stuck in a problem. Let me be very transparent. I'm building a project and it has various layers(set of recipes), and the process we were following to rebuild it, till now was to remove everything in the build directory(i.e bitbake.lock ,/sstatecache/, /tmp-glib/). So everytime we had to build it we had to build it from the scratch. Now what i found that in the new build, there was changes in a specific layer (i.e.- meta-bsp-layer/), now when i try to run bitbake -c clean meta-bsp-layer it throws a "NOTHING PROVIDES meta-bsp-layer". My problem statement is how do i delete only the files created by this layer,so when u rebuild only the changes get build, hence my build time gets reduced. Thanks in advance.

[@Toradexofficial]

Hi Ankit, If you want to clean all recipes from a layer, I'm not sure there is a specific command for that, but you could try scripting to automate the task, e.g.: for RECIPE in $(find ../layers/meta-toradex-nxp/ -name "*.bb" -printf "%f " | rev | cut -d '.' -f 2- | rev); do bitbake -c cleanall "$RECIPE"; done Best regards Team Toradex

[@sumitvaise5452]

Thank You so much for this tutorial it was really helpful. I had Linux wayland image with qt libraries installed and also to compile the programs i had meta-toolchain-qt5 which creates an SDK to compile the qt codes. Now i added opencv libraries on the same image. But again in order to compile opencv i need a SDK. If i do bitbake -c populate_sdk , will bitbake add opencv compiler in the same sdk or will it create a new SDK?And if it creates a new SDK will it have the compiling capability to compile QT codes? How to enable ethernet for my board to perform openssh? How can i create my own layer, what are the necessary steps we need to follow?

[@Toradexofficial]

Building meta-toolchain-qt5 will only provide the Qt5 libraries. Try adding “inherit populate_sdk_qt5” to the image recipe to use the “-c populate_sdk” method of generating the SDK. I believe that inheriting populate_sdk_qt5 will add the necessary Qt build support to the image SDK. Ethernet & SSH should be enabled by default - check that you have either dropbear or openssh are in the image recipe and check the device tree to ensure that Ethernet is properly configured. For layer creation, refer to Part 2 (Advanced) of the Yocto webinar: kzbin.info/www/bejne/nIa4mKunhMhmf6M

[@sumitvaise5452]

Toradex Thank you for your answer. I am just newbie into yocto, if you could provide some reference on how to check device tree foe Ethernet. I was also trying to connect my webcam into my board. When I do lsusb it shows my webcam name. So is that mean drivers for webcam is installed? Even when I do dmesg it shows uvcvideo found. if everything is there then when try to stream through gstreamer it throws an error of internal data flow and hangs. Kindly provide some knowledge over this. if drivers are not installed then how can I install them in my image.

[@Toradexofficial]

You can refer to the following article about device trees: developer.toradex.com/device-tree-customization. There should be a node specific to the Ethernet controller. Assuming the webcam is UVC compliant (which the kernel messages seem to indicate) then the Linux UVC driver should suffice in conjunction with Gstreamer. You may refer to the following article: developer.toradex.com/knowledge-base/webcam-(linux). We recommend using our community site for further questions: community.toradex.com. Thank you.

[@pawankumarideology]

hi I need a video about build appliance image in VMware workstation about network settings during bitbake

[@Toradexofficial]

Hi Pawan, In order to help with your question, we would need more information regarding the issues you are facing. A more appropriate channel to ask technical questions is community.toradex.com, where you can ask questions and also browse for solutions to similar questions. Best regards, Team Toradex

[@sathibabu5205]

can you please explain bitbake and how it works

[@Toradexofficial]

We recommend you to have a look here to learn more: www.yoctoproject.org/docs/2.0/bitbake-user-manual/bitbake-user-manual.html