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kbr-net / sdrive-max

Arduino based Atari 8-bit Floppy Emulator with Touchscreen
http://www.kbrnet.de/projekte/sdrive-max/index.html
GNU General Public License v3.0
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Strange behavior with VMA412 screen #54

Open cx1976 opened 1 year ago

cx1976 commented 1 year ago

Hello, i build a sdrive using a vma412 from Velleman. It's clearly described as using the ILI9341 chip. Strangely the screen remained white. I tested with other versions and the ILI9325 and RM68090 give some result (both give a corrupted but visible picture, 68090 add a correct touchscreen). Even more bizarre: Some peoples report the vma412 work fine with sdrive, other have the same problem. After some research it appear the vma (and other clones) can indeed use ILI9341 but some (mine included) use the Sitronix ST7781 chip but BOTH share the same reference... A pretty bad joke isn't? Do you think adding ST7781 support is doable/pertinent or should I find another screen?

kbr-net commented 1 year ago

This is not unrealistic, maybe this display needs some other initialization code. Maybe we could get some code from other arduino projects like https://github.com/yamsam/TFTLCD_ST7781.