OctoPrint AND Marlin on a single 7" touchscreen
Experimental. Code and schematics will be uploaded to GitHub in a near future (after some cleaning !)
This project is part of a 3D printer controller running OctoPrint + TouchUI. I didn't want two displays (one for Marlin, the other for TouchUI).
The circuits convert the Marlin display signal into a video signal. The source can be selected on the LCD : the composite video signal from the midcrocontrollers, or the RaspBerry HDMI output.
More information on Arduino for STM32 forums : https://www.stm32duino.com/viewtopic....
Special thanks to the guys who helped me with SPI on STM32 !