Embear's Journal
Using SWUpdate with Qt
06 May 2023
An example integration for SWupdate into Qt for an embedded system
Concepts for updating embedded systems
12 Jun 2022
An overview of concepts to implement software updates for embedded systems
Accessing a DRM Framebuffer to display an image
19 Jul 2021
To test if a display interface works we often don't want to use a huge framework like GTK or Qt. This article shows an easy way on how we can use a framebuffer directly on a DRM graphics driver under Linux.
Booting RAM disk images over Ethernet
08 Jun 2021
To boot a system for the first time, it is often necessary to boot Linux using a RAM disk image. Here are some examples on how to use Ethernet to load and boot RAM disk images.
Why did my remote device reboot?
03 May 2021
When dealing with remote systems it is helpful to know why a system was restarting. Some possible reasons for a reboot are power-cycle, soft-reboot, kernel panic and watchdog. This article shows a concept of how we detect such scenarios by using reserved memory.
Use ramoops for logging under Linux
07 Apr 2021
Store the kernel log, console output and user messages persistent between reboots
Using the parent child relation in a kernel module
08 Mar 2021
This article shows based on an LED how we can gain access to a device, which isn't exposed direclty, by using the parent child relation of Linux kernel drivers
Cross compiling a kernel module
07 Mar 2021
This article shows how we can cross compile a kernel module for an embedded device without replacing the kernel
Containers and PIDs
17 Jan 2021
Processes inside a container have different numbers than processes outside a container
