I wanted to add a lightweight heads-up display to the server, and I wanted a graphical application that could operate without X, the usual graphical system on Linux. This article is a summary of multiple sources I pieced together. Linux provides the concept of a framebuffer , a virtual device that can be read from and written to in order to display graphics. The contents of a framebuffer are then typically displayed on a screen. In this section, we will configure the framebuffers to allow for some convenient functionality.
Embedded GUI Using Linux Frame Buffer Device with LVGL
Linux framebuffer - WikiMili, The Best Wikipedia Reader
LVGL is a graphics library targeting microcontrollers with limited resources. However it possible to use it to create embedded GUIs with high-end microprocessors and boards running Linux operation system. NXP i. Raspbery PI 3. The frame buffer device is a very low-level interface to display something on the screen. Speaking about an embedded GUI there are several reasons to use the frame buffer directly instead of a Window manager:.
It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. I am not sure if it is the only possible way, but I read that in order to put a single pixel onto the screen at a location of your choice one has to write something into a place called framebuffer. So I became curious, if it is possible to enter into this place and write something into it in order to display a single pixel somewhere on the screen.
A framebuffer frame buffer , or sometimes framestore is a portion of random-access memory RAM  containing a bitmap that drives a video display. It is a memory buffer containing data representing all the pixels in a complete video frame. This circuitry converts an in-memory bitmap into a video signal that can be displayed on a computer monitor.