I 'm trying to simulate in Proteus STM32F103C4 + LCD2x16 (1602). I 'm trying the simplest possible way, which is with logical gates and 'convert' it to code for the STM32.

[Panagiotis]

I took it from this video.

I 'm using STM32CubeMX 5.2.1 + Atollic TrueStudio 9.3.0 + Proteus 8.6.

Till now I haven't managed to make it work.

I think I'm making a mistake in pins setup or some clock 's setup.

I have tried any possible potion for pins: pull up, pull down, no pull up - no pull down, output level high, low...anything!!

Here are all the files (Proteus project + TrueStudio-CubeMX poject). Click on the green button 'Clone or download'->Download Zip.

Any help appreciated.

EDIT: is there a way to make a pin of the STM32 to source current instead of sinking current? I think this is the key in finding a solution to my problem.