Month: June 2022

Graphics libraries for embedded systems

This is a small list of GUI for embedded system, mainly for microcontrollers, but some for Linux as well.

FBGraphics: https://github.com/grz0zrg/fbg

FLKT: https://www.fltk.org

GUIslice: https://github.com/ImpulseAdventure/GUIslice

imGUI: https://github.com/ocornut/imgui

LVGL: https://lvgl.io

micro-gui: https://github.com/ryankurte/micro-gui

Nano-X (previously known as Microwindows) : http://www.microwindows.org

NanoSVG: https://github.com/memononen/nanosvg

Nuklear: https://github.com/Immediate-Mode-UI/Nuklear

TIGR: https://github.com/erkkah/tigr

TouchGFX: https://www.touchgfx.com

u8glib: https://github.com/olikraus/u8glib

uGFX: https://ugfx.io/

uGUI: https://github.com/achimdoebler/UGUI

Converting SVG to PDF

This is how I convert SVG to PDF:

$ sudo apt-get install librsvg2-bin
$ rsvg-convert -f pdf -o t.pdf t.svg

Source: https://superuser.com/questions/381125/how-do-i-convert-an-svg-to-a-pdf-on-linux

Cloning and configuring the Meadow private repository

$ git clone git@github.com:WildernessLabs/Meadow.git

$ cd Meadow

$ git submodule update --init ./mbedtls ./mono/external/*

$ ./build.sh

Compiling pic30-gcc on Linux

Some people don’t know, but Microchip uses GCC compiler on their MPLAB, they are using it for more than 15 years and never contributed back to mainline. Even worst: they have some non-free optimization that they don’t release as open-source. But don’t worry, Darwin is implacable, they are losing marketing share year after year (even after spent Billions to buy Atmel).

Now the good news is someone created some script to compile pic30-gcc to Linux (or Cygwin) with the patches that Microchip was obligated to release as open-source because the GPL license and put it here: https://github.com/makes/c30-linux but it is outdated for about 11 years.

Even so I decided to try to compile it and after some small modifications I succeeded, these are the steps:

$ git clone https://github.com/makes/c30-linux
$ cd c30-linux
$ git am /path/to/0001-Fix-pic30-linux-compilation-on-Ubuntu-21.10.patch
$ ./configure
$ make
$ sudo make install
$ sudo cp -a /usr/local/pic30/* /usr/local/

I don’t have plans to use it and I suggest you to avoid using it. It is better to use a microcontroller with a well supported GCC compiler from a company that contribute back to the open-source community.

Note: the above patch can be downloaded from here: https://pastebin.com/raw/9N7CiBYX

Update: PIC24 gcc is also available: https://github.com/fabio-d/xc16plusplus