bogus105:
Dear ZinggJM,could you tell us more how to use 2.9inch Waveshare display with Arduino Nano/Uno. Let's leave 5V-3.3V voltage conversion issues.
I don't know pin assignments and library usage:/I tried to figure out pinout shown in i.e. GxGDEH029A1.cpp file but it is for DESTM32-S2 connection board for STM32 system not for Arduino:/
Please put some light how to talk to WaveShare e-papers from Arduino.
One of the problems i found during compilation is that variable used to store screen resolution is uint8_t. 2.9inch screen has 296 x 128 pixels so 296 is greater that uint8_t can handle so overflow errors appeard. This is just one of the errors.
I have decided that I will look at your problems as soon as your post is more specific, more clearly stated, and more correct.
My code is generic as far as possible, with target processor specific default values for the constructor.
The DESTM32-S2 connection board is NOT STM32 specific, but its pinout matches the DESTM32-S1 STM32 demo board from Good Display.
Please state which uint8_t variable (name it!) you mean, and what other errors you refer to.