https://raymii.org/s/tags/openembedded.xml RSS feed for tag openembedded on Raymii.org https://raymii.org/s/tutorials/Yocto_boot2qt_for_the_Seeed_reTerminal_qt6.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/tutorials/Yocto_boot2qt_for_the_Seeed_reTerminal_qt6.html In this guide we'll build a linux distribution for Seeed reTerminal, using the Yocto project and the `boot2qt` stack provided by Qt. This `boot2qt` image can be written to the internal eMMC and when booted up, the Seeed reTerminal runs a software stack that integrates nicely with Qt Creator (the Qt IDE), for example, one click deployment to the device. You can run your own Qt application on the reTerminal, full screen, it will boot right into it. This guide covers Qt 6.2. The guide also covers changing the default startup app to your own app, Qt Creator integration and rotating your Qt app, both Widgets and QML, the latter via Wayland and Weston. Fri, 18 Mar 2022 00:00:00 GMT Mon, 04 Apr 2022 00:00:00 GMT https://raymii.org/s/snippets/Execute_a_script_in_a_Yocto_package_on_every_image_build.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/snippets/Execute_a_script_in_a_Yocto_package_on_every_image_build.html This is a small snippet showing a Yocto recipe that executes a script on every build of an image that includes that recipe. I use it to write the build hosts date/time to a file on the image, but you could do anything you want inside the script. It's not recommended to do this, for example, if you want to place a binary on your image you should version it correctly. Yocto can build from a git repo, no need to copy binaries. If you include the `buildinfo` class your image or the `os-release` recipe, build info is also written to your image. Tue, 22 Feb 2022 00:00:00 GMT Tue, 22 Feb 2022 00:00:00 GMT https://raymii.org/s/tutorials/Yocto_boot2qt_for_the_Raspberry_Pi_4_both_Qt_6_and_Qt_5.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/tutorials/Yocto_boot2qt_for_the_Raspberry_Pi_4_both_Qt_6_and_Qt_5.html In this guide we'll build a linux distribution for Raspberry Pi 4, using the Yocto project and the `boot2qt` stack provided by Qt. This `boot2qt` image can be written to an SD card and when booted up, the Raspberry Pi runs a software stack that integrates nicely with Qt Creator (the Qt IDE), for example, one click deployment to the device. You can run your own Qt application on the Pi, full screen, it will boot right into it. This guide covers both Qt 5.15 and Qt 6.2. The 5.15 build process is a bit convoluted due to a few upstream issues. The guide also covers changing the default startup app to your own app and Qt Creator integration. Mon, 21 Feb 2022 00:00:00 GMT Mon, 21 Feb 2022 00:00:00 GMT https://raymii.org/s/snippets/connman_operstate_list.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/snippets/connman_operstate_list.html Recently I was debugging connection issues with a system that uses connman as it's network management software. In the log it was visible that the connection went away and came back, logged with 'operstate' $number $state. I couldn't easily find an overview of all the possible states, but since it's open source we can take a look at the code to find out. Publishing it here for future reference. Tue, 25 Jun 2019 00:00:00 GMT Tue, 25 Jun 2019 00:00:00 GMT https://raymii.org/s/tutorials/Building_IPK_packages_by_hand.html?utm_medium=rss&utm_source=raymii&utm_campaign=tagrss https://raymii.org/s/tutorials/Building_IPK_packages_by_hand.html .ipk packages are used by a variety of embedded linux systems, like routers running OpenWRT and appliances running on OpenEmbedded (Yocto). The opkg command installs these packages and OpenEmbedded comes with a set of tools to build .ipk packages. Recently I had to create ipk packages in a scripted fashion for a few hundred systems, all unique per system. The .ipk packages includes a few software changes for debugging, a systemd service and one precompiled binary. The yocto build tools were not available on the machine where these packages would be made so I had to figure out how to make them by hand, which means, automatically. The packages are actually just compressed files containing a few control files and the data to be extracted on the filesystem. This article will walk you through the steps of creating these packages by hand. Fri, 05 Apr 2019 00:00:00 GMT Fri, 05 Apr 2019 00:00:00 GMT