Arduino for STM32

Thank you fpiSTM!! You were correct.

I dusted off my oscilloscope to discover that the Adafruit library left the DC line floating. The floating DC line caused all sorts of issues: the display would work for a few seconds at most, and would work with some power supplies but not others, etc. When I ...

Thank you for your suggestion and link. The display initialization procedure requires 2 pins for device control and chip select, which in my case are A0 and A1. I use constants PA0 and PA1 for these. I also tried PIN_A0 and PIN_A1. Neither work. Should I be referring to these pins in a different way?

I am using a Blue Pill board (128K) with an ILI9341 display, running the Adafruit graphicstest example. It works great using Roger's core. However, when I switch to the official STM32 core, the display looks like it does not initialize (it stays white).

From trying other examples, I see that the ...