Add display init code for Lilygo TTGO T8 ESP32-S2

[m4tk]

No description provided.

[netroy]

i'll test and leave my comments later. thanks for doing this :)

[tannewt]

Code looks good! Will approve and merge after @netroy tests. Thanks!

[skieast]

I don't believe IO4 is connected to MISO on the board. When I was working on the UF2 bootloader I attempted to query the ST7789 using this and couldn't get it to work. It also is not shown on the schematic on LilyGo Github.
https://github.com/Xinyuan-LilyGO/LilyGo-T-Display-S2/blob/master/schematic/ESP32_S2-Display.pdf

[m4tk]

@skieast thanks for pointing this out. I had just taken this over from the Lilygo example app :-) Ok, I removed MISO from the code.

[netroy]

I was able to replace my FourWire/ST7789 initialization code with simply board.DISPLAY, and everything worked as expected. ❤️

[m4tk]

@netroy thanks for testing this :-)

[netroy]

Not sure if this is the ticket to discuss this, but I installed the latest tinyuf2, to test out @skieast's PR.
While both these PRs work as expected individually, once I have both installed on the board, I'm seeing some ghosting when using displayio (the slightly dark text at the top and the bottom of the screen).

is there some kinda of display-reset that I need to do, to flush out the previous graphics completely?
or is that something that needs to happen in this code?

[skieast]

Not sure if this is the ticket to discuss this, but I installed the latest tinyuf2, to test out @skieast's PR.
While both these PRs work as expected individually, once I have both installed on the board, I'm seeing some ghosting when using displayio (the slightly dark text at the top and the bottom of the screen).

is there some kinda of display-reset that I need to do, to flush out the previous graphics completely?
or is that something that needs to happen in this code?

I'm out most of today but I'm guessing we should probably coordinate the init code in both apps (TinyUF2 and CPY) It's interesting though. I had tried some test code but didn't notice this. Thanks,

[m4tk]

hmm strange, I also have the tinyuf2 installed…but didn’t experienced such ghosting effects yet…

[m4tk]

@netroy can you provide your test script please? Then I will check if this ghosting is also visible on my board.

[netroy]

@m4tk the more I try to reproduce this, the weaker the ghosting gets. it's at a point where I can't see it anymore.
I'll ping you back, if I manage to consistently reproduce it.

[tannewt]

One pin suggestion.

[tannewt]

Thank you!