Generic SPI Screen for Coffee Machine

[Pesle]

Hey, I need some help. Im trying to make a generic SPI screen work on my old coffee machine as it broke and costs alot to replace it and pretty hard to track down in Australia. So far i have gotten very close. The image appears but is split in half (top and bottom row is in the middle). All the information i have on hacking this machine is here:
https://github.com/OpHaCo/smart_coffee_machine
This is the screen im using:
https://www.adafruit.com/product/250

I have tried Inverting the CS signal, but the screen stops working. Not much more I can think of other than maybe delaying the A0 Pin. Is there something else im missing?

[amyk]

That LCD is likely made by this company:

https://www.vitek.com.tw/cog-module.htm

I suspect the code is expecting an LCD with a slightly different scan direction. If you look at the datasheets some controllers have options to change the scan direction --- this is mainly to ease the COG layout.

[james_s]

It's actually surprising that it works that well, most of these displays have a bunch of initialization commands that have to be sent before it will do anything at all. It's entirely possible that this display requires a slightly different series of commands. Do you have a logic analyzer or bus pirate or something that can sniff the SPI lines to see what's happening?

[Pesle]

Yea, I've got a Siglent 1202x-e. Just gotta figure out how to use decoding on it. Probably wont be that hard

[james_s]

This seems like an excellent opportunity to try it out. Pay particular attention to the initialization at power up.